PC2 Series - KevinChant.com · PC2R Rear Panel..... 1-6 Rear Panel Features ... Kurzweil PC2 Series...

PC2 Series
Service Manual
©2004 All rights reserved. Kurzweil is a product line of Young Chang Co.; Kurzweil is atrademark of Young Chang Co. All other products and brand names are trademarks orregistered trademarks of their respective companies. Product features and specificationsare subject to change without notice.

Part Number: 910395 Rev. A

The lightning flash with the arrowhead symbol,within an equilateral triangle is intended to alertthe user to the presence of uninsulated"dangerous voltage" within the product'senclosure that may be of sufficient magnitudeto constitute a risk of electric shock to persons.

The exclamation point within an equilateraltriangle is intended to alert the user to thepresence of important operating andmaintenance (servicing) instructions in theliterature accompanying the product.

CAUTIONRISK OF ELECTRIC SHOCK

DO NOT OPEN

REFER SERVICING TO QUALIFIED SERVICE PERSONNELNO USER SERVICEABLE PARTS INSIDE

DO NOT REMOVE THE COVER

CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,

IMPORTANT SAFETY & INSTALLATION INSTRUCTIONSINSTRUCTIONS PERTAINING TO THE RISK OF FIRE, ELECTRIC SHOCK, OR INJURY TO PERSONS

WARNING: When using electric products, basic precautions shouldalways be followed, including the following:

1. Read all of the Safety and Installation Instructions and Explanationof Graphic Symbols before using the product.

2. Do not use this product near water—for example, near a bathtub,washbowl, kitchen sink, in a wet basement, or near a swimmingpool, or the like.

3. This product should be used only with a stand or cart that isrecommended by the manufacturer.

4. This product, either alone or in combination with an amplifier andspeakers or headphones, may be capable of producing soundlevels that could cause permanent hearing loss. Do not operate fora long period of time at a high volume level or at a level that isuncomfortable. If you experience any hearing loss or ringing in theears, you should consult an audiologist.

5. The product should be located so that its location or position doesnot interfere with its proper ventilation.

6. The product should be located away from heat sources such asradiators, heat registers, or other products that produce heat.

7. The product should be connected to a power supply only of the typedescribed in the operating instructions or as marked on the product.

8. This product may be equipped with a polarized line plug (one bladewider than the other). This is a safety feature. If you are unable toinsert the plug into the outlet, contact an electrician to replace yourobsolete outlet. Do not defeat the safety purpose of the plug.

ii

9. The power supply cord of the product should be unplugged from theoutlet when left unused for a long period of time. When unpluggingthe power supply cord, do not pull on the cord, but grasp it by theplug.

10. Care should be taken so that objects do not fall and liquids are notspilled into the enclosure through openings.

11. The product should be serviced by qualified service personnelwhen:

A. The power supply cord or the plug has been damaged;

B. Objects have fallen onto, or liquid has been spilled into theproduct;

C. The product has been exposed to rain;

D. The product does not appear to be operating normally orexhibits a marked change in performance;

E. The product has been dropped, or the enclosure damaged.

12. Do not attempt to service the product beyond that described in theuser maintenance instructions. All other servicing should bereferred to qualified service personnel.

13. WARNING: Do not place objects on the product’s power supplycord, or place the product in a position where anyone could tripover, walk on, or roll anything over cords of any type. Do not allowthe product to rest on or be installed over cords of any type.Improper installations of this type create the possibility of a firehazard and/or personal injury.

RADIO AND TELEVISION INTERFERENCE
WARNING: Changes or modifications to this instrument not expresslyapproved by Young Chang could void your authority to operate theinstrument.
IMPORTANT: When connecting this product to accessories and/or otherequipment use only high quality shielded cables.

NOTE: This instrument has been tested and found to comply with thelimits for a Class A digital device, pursuant to Part 15 of the FCC Rules.These limits are designed to provide reasonable protection againstharmful interference when the instrument is used in a commercialenvironment. This instrument generates, uses, and can radiate radiofrequency energy and, if not installed and used in accordance with theinstruction manual, may cause harmful interference to radiocommunications. Operation of this instrument in a residential area islikely to cause harmful interference, in which case the user will berequired to correct the interference at his or her own expense.

Changes and modifications not expressly approved by the manufacturer

or registrant of this instrument can void the user’s authority to operatethis instrument under Federal Communications Commission rules.

In order to maintain compliance with FCC regulations, shielded cablesmust be used with this instrument. Operation with unapprovedequipment or unshielded cables is likely to result in harmful interferenceto radio and television reception.

NOTICE This apparatus does not exceed the Class A limits for radio noiseemissions from digital apparatus set out in the Radio InterferenceRegulations of the Canadian Department of Communications.

AVIS Le present appareil numerique n’emet pas de bruits radioelectriquesdepassant les limites applicables aux appareils numeriques de laclass A prescrites dans le Reglement sur le brouillage radioelectriqueedicte par le ministere des Communications du Canada.

SAVE THESE INSTRUCTIONS

Young Chang DistributorsContact the nearest Young Chang office listed below to locate your local Young Chang/Kurzweil representative.

A N D Music Corp.

P.O. Box 99995Lakewood, WA 98499-0995Tel: (253) 589-3200Fax: (253) 984-0245

Young Chang Akki Co., Ltd.

178-55 Gajwa-DongSeo-Ku, InchonKorea 404-250Tel: 011-82-32-570-1380Fax: 011-82-32-570-1218

Young Chang America, Inc. (Canadian Division)

P.O. Box 615159350 Yonge StreetRichmond Hill, OntarioCanada L4C 3N0Tel: (905) 508-0531Fax: (905) 508 1308

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ContentsYoung Chang Distributors ............................................................................................................................................... iii

Chapter 1 IntroductionModels ....................................................................................................................................................................... 1-1Notes, Cautions, Warnings ..................................................................................................................................... 1-1

PC2/PC2X ........................................................................................................................................................................ 1-2PC2/PC2X Rear Panel ............................................................................................................................................. 1-2Rear Panel Features.................................................................................................................................................. 1-2PC2/PC2X Front Panel............................................................................................................................................ 1-3Front Panel Features ................................................................................................................................................ 1-3

PC2R.................................................................................................................................................................................. 1-6PC2R Rear Panel....................................................................................................................................................... 1-6Rear Panel Features.................................................................................................................................................. 1-6PC2R Front Panel ..................................................................................................................................................... 1-6Front Panel Features ................................................................................................................................................ 1-7

Chapter 2 DiagnosticsDiagnostic Tests ............................................................................................................................................................... 2-1Entering Diagnostics....................................................................................................................................................... 2-2Diagnostic Test Modes.................................................................................................................................................... 2-2

Run One Test............................................................................................................................................................. 2-2Run Burn-in............................................................................................................................................................... 2-3

Test Results....................................................................................................................................................................... 2-3Description of Tests......................................................................................................................................................... 2-4

ROM........................................................................................................................................................................... 2-4Read-write................................................................................................................................................................. 2-4RAM........................................................................................................................................................................... 2-4MABEL ...................................................................................................................................................................... 2-4LISA ........................................................................................................................................................................... 2-4Sound ROM .............................................................................................................................................................. 2-4ZRAM ........................................................................................................................................................................ 2-5MIDI........................................................................................................................................................................... 2-5LED............................................................................................................................................................................. 2-5PCX-1 ROM............................................................................................................................................................... 2-5PCX-1 RW.................................................................................................................................................................. 2-5PCX-1 RAM............................................................................................................................................................... 2-5PCX-1 MABEL .......................................................................................................................................................... 2-6PCX-1 SROM............................................................................................................................................................. 2-6

Chapter 3 PC2R Disassembly/AssemblyIntroduction ..................................................................................................................................................................... 3-1

Cables, Connectors................................................................................................................................................... 3-1Flat Ribbon Cables ............................................................................................................................................ 3-1Cable Routing.................................................................................................................................................... 3-1

Required Tools and Materials................................................................................................................................. 3-1Opening the PC2R........................................................................................................................................................... 3-2

Kurzweil PC2 Series Service Manual

Contents

Removing the Top Cover ........................................................................................................................................ 3-2Replacing the Top Cover......................................................................................................................................... 3-2Removing the Connector Board............................................................................................................................. 3-3Replacing the Connector Board ............................................................................................................................. 3-4Removing the Polyphony Expansion Board (PCX-1) ......................................................................................... 3-5Replacing the Polyphony Expansion Board (PCX-1).......................................................................................... 3-5Removing the Engine Board................................................................................................................................... 3-6Replacing the Engine Board ................................................................................................................................... 3-6

Front Panel Assembly..................................................................................................................................................... 3-8Removing the Front Panel Assembly.................................................................................................................... 3-8Replacing the Front Panel Assembly..................................................................................................................... 3-8Removing the Front Panel Faceplate..................................................................................................................... 3-9Replacing the Front Panel Faceplate ..................................................................................................................... 3-9Front Panel Boards................................................................................................................................................... 3-9Removing the Right Front Panel Board .............................................................................................................. 3-10Replacing the Right Front Panel Board................................................................................................................3-11Removing the LCD Board......................................................................................................................................3-11Replacing the LCD Board ..................................................................................................................................... 3-12Removing the Left Front Panel Board................................................................................................................. 3-12Replacing the Left Front Panel Board ................................................................................................................. 3-13Removing the Headphone/Volume/Power Switch Board ............................................................................. 3-14Replacing the Headphone/Volume/Power Switch Board.............................................................................. 3-14

Chapter 4 PC2/PC2X Disassembly/AssemblyIntroduction ..................................................................................................................................................................... 4-1

Notes, Cautions, Warnings ..................................................................................................................................... 4-1Cables, Connectors................................................................................................................................................... 4-1

Flat Ribbon Cables ............................................................................................................................................ 4-1Cable Routing.................................................................................................................................................... 4-1

Required Tools and Materials................................................................................................................................. 4-1Opening the PC2/PC2X ................................................................................................................................................. 4-2

PC2 Bottom ............................................................................................................................................................... 4-2PC2X Bottom............................................................................................................................................................. 4-3Removing the Top Enclosure.................................................................................................................................. 4-4Replacing the Top Enclosure .................................................................................................................................. 4-6Closing the PC2/PC2X............................................................................................................................................ 4-6

Top Enclosure................................................................................................................................................................... 4-7Removing the Enclosure Support Walls ............................................................................................................... 4-8

Left Enclosure Support Wall............................................................................................................................ 4-8Right Enclosure Support Wall......................................................................................................................... 4-8

Replacing the Enclosure Support Walls................................................................................................................ 4-8Left Enclosure Support Wall............................................................................................................................ 4-8Right Enclosure Support Wall......................................................................................................................... 4-8

Removing the Connector Board............................................................................................................................. 4-8Replacing the Connector Board ........................................................................................................................... 4-10Removing the Front Panel Board......................................................................................................................... 4-10Replacing the Front Panel Board ......................................................................................................................... 4-12Removing the LCD Board..................................................................................................................................... 4-13Replacing the LCD Board ..................................................................................................................................... 4-13Removing the Polyphony Expansion Board (PCX-1) ....................................................................................... 4-13Replacing the Polyphony Expansion Board (PCX-1)........................................................................................ 4-14

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Contents

Removing the Slider Board................................................................................................................................... 4-14Replacing the Slider Board ................................................................................................................................... 4-15Removing the Engine Board................................................................................................................................. 4-15Replacing the Engine Board ................................................................................................................................. 4-17Removing the Mod Wheel Assembly.................................................................................................................. 4-17Replacing the Mod Wheel Assembly .................................................................................................................. 4-18

PC2 Keyboard Assembly.............................................................................................................................................. 4-19Removing the PC2 Keyboard Assembly............................................................................................................. 4-19Replacing the PC2 Keyboard Assembly ............................................................................................................. 4-20Disconnecting the PC2 Keyboard ........................................................................................................................ 4-21Connecting the Keyboard ..................................................................................................................................... 4-21Removing Keys ...................................................................................................................................................... 4-22

Natural/White Key ........................................................................................................................................ 4-22Natural/White Keys.............................................................................................................................................. 4-23Sharp/Black Keys .................................................................................................................................................. 4-23Replacing a Key...................................................................................................................................................... 4-24Servicing the Keyboard Contact Boards ............................................................................................................. 4-24

Removing the Treble Contact Board ............................................................................................................ 4-24Replacing the Treble Contact Board ............................................................................................................. 4-24Removing the Bass Contact Board ............................................................................................................... 4-24Replacing the Bass Contact Board ................................................................................................................ 4-24

Removing the Keyboard Contact Strips ............................................................................................................. 4-25Replacing the Keyboard Contact Strips .............................................................................................................. 4-25

PC2X Keyboard Assembly ........................................................................................................................................... 4-26Removing the PC2X Keyboard Assembly .......................................................................................................... 4-26Replacing the PC2X Keyboard Assembly........................................................................................................... 4-27Removing Keys ...................................................................................................................................................... 4-27

Natural/White Key ........................................................................................................................................ 4-28Natural/White Keys.............................................................................................................................................. 4-28Sharp/Black Keys .................................................................................................................................................. 4-29Replacing a Key...................................................................................................................................................... 4-30Servicing the Keyboard Contact Boards ............................................................................................................. 4-30

Removing the Treble Contact Board ............................................................................................................ 4-30Replacing the Treble Contact Board ............................................................................................................. 4-30Removing the Bass Contact Board ............................................................................................................... 4-30Replacing the Bass Contact Board ................................................................................................................ 4-31

Removing the Keyboard Contact Strips ............................................................................................................. 4-31Replacing the Keyboard Contact Strips .............................................................................................................. 4-32Removing a Key Weight........................................................................................................................................ 4-32Replacing a Key Weight ........................................................................................................................................ 4-33

Chapter 5 TroubleshootingIntroduction ..................................................................................................................................................................... 5-1

Cables, Connectors................................................................................................................................................... 5-1Flat Ribbon Cables ............................................................................................................................................ 5-1Cable Routing.................................................................................................................................................... 5-1

Surface-Mount Devices ........................................................................................................................................... 5-1Saving User Data...................................................................................................................................................... 5-1

Boot Block......................................................................................................................................................................... 5-2Entering the Boot Block........................................................................................................................................... 5-2

Resets................................................................................................................................................................................. 5-2

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Contents

Hard Reset................................................................................................................................................................. 5-2Soft Reset ................................................................................................................................................................... 5-2

Software Updates ............................................................................................................................................................ 5-3File Formats............................................................................................................................................................... 5-3Installing the Operating System or Setups........................................................................................................... 5-3Installing a New Boot Block ................................................................................................................................... 5-4Installing Sound ROM Options.............................................................................................................................. 5-4

Replacing the Battery...................................................................................................................................................... 5-5PC2 Keyboard Models............................................................................................................................................. 5-5

Accessing the Battery ....................................................................................................................................... 5-5Removing the Battery....................................................................................................................................... 5-5Installing the Battery ........................................................................................................................................ 5-5

PC2R Rack Models................................................................................................................................................... 5-6Accessing the Battery ....................................................................................................................................... 5-6Removing the Battery....................................................................................................................................... 5-6Installing the Battery ........................................................................................................................................ 5-6

Scanner Tests .................................................................................................................................................................... 5-7PC2R Rack Models................................................................................................................................................... 5-7

Front Panel Buttons .......................................................................................................................................... 5-7Alpha Wheel ...................................................................................................................................................... 5-7Front Panel Knobs............................................................................................................................................. 5-7

PC2 Keyboard Models............................................................................................................................................. 5-8Front Panel Buttons .......................................................................................................................................... 5-8Alpha Wheel ...................................................................................................................................................... 5-8Front Panel Sliders............................................................................................................................................ 5-8Wheels ................................................................................................................................................................ 5-9Keyboard............................................................................................................................................................ 5-9Switch Pedals 1, 2, and 3.................................................................................................................................. 5-9Continuous Pedals 1 and 2 .............................................................................................................................. 5-9

Power Problems............................................................................................................................................................. 5-10Dead ......................................................................................................................................................................... 5-10

Audio Problems............................................................................................................................................................. 5-10No Audio................................................................................................................................................................. 5-10

Front Panel Problems.....................................................................................................................................................5-11LCD not lit................................................................................................................................................................5-11Buttons, Sliders or Controllers not working .......................................................................................................5-11

Keyboard Problems....................................................................................................................................................... 5-12Dead Keyboard....................................................................................................................................................... 5-12Dead Note(s) ........................................................................................................................................................... 5-12

One or More in a Section................................................................................................................................ 5-12Mechanical Noise............................................................................................................................................ 5-12

PC2R Interconnect Diagram ........................................................................................................................................ 5-13PC2 Interconnect Diagram........................................................................................................................................... 5-14

Chapter 6 Parts ListsIntroduction ..................................................................................................................................................................... 6-1

PC2/PC2X Printed Circuit Boards and Assemblies............................................................................................ 6-1PC2R Printed Circuit Boards and Assemblies ..................................................................................................... 6-2

PC2R/PC2/PC2X............................................................................................................................................................ 6-3Engine Board, N012300051 ..................................................................................................................................... 6-3

PC2/PC2X ........................................................................................................................................................................ 6-5

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Contents

Front Panel Board, N012400052 ............................................................................................................................. 6-5Connector Board, N012300061 ............................................................................................................................... 6-6LCD Board, N012103800 ......................................................................................................................................... 6-8Pitch & Mod Wheel Assembly, N012300053 ........................................................................................................ 6-8Slider Board, N012400051 ....................................................................................................................................... 6-9

PC2 .................................................................................................................................................................................... 6-9Final Assembly, N012000150 .................................................................................................................................. 6-9Keyboard Assembly, N215040311 ........................................................................................................................ 6-10

PC2X.................................................................................................................................................................................6-11Final Assembly N012000151..................................................................................................................................6-11Keyboard Assembly, N215040413........................................................................................................................ 6-12

PC2R................................................................................................................................................................................ 6-13Connector Board, N01230004 ............................................................................................................................... 6-13Front Panel Assembly, N012300070..................................................................................................................... 6-14Left Front Panel Board, N012300080 ................................................................................................................... 6-14Right Front Panel Board, N012300090................................................................................................................. 6-15Headphone/Volume/Power Switch Board, N012700019................................................................................ 6-15LCD Board, N012103802 ....................................................................................................................................... 6-15Final Assembly, N012000153 ................................................................................................................................ 6-16

Chapter 7 SchematicsEngine Board–Microprocessor (page 1 of 5)................................................................................................................ 7-3Engine Board–Master/Slave Mabels (page 2 of 5) ..................................................................................................... 7-4Engine Board–Lisa F/X 128Ch Option, Clocks (page 3 of 5).................................................................................... 7-5Engine Board–Sound ROM, Uart, Glue, Decoupling (page 4 of 5).......................................................................... 7-6Engine Board–Audio Channel, Muting Control (page 5 of 5) .................................................................................. 7-7Front Panel and IBBB Board (keyboard models)–FP Buttons and LEDs (page 1 of 2).......................................... 7-8Front Panel and IBBB Board (keyboard models)–IBBB Buttons and LEDs (page 2 of 2) ..................................... 7-9Connector Board (keyboard models)–Scanner (page 1 of 3)................................................................................... 7-10Connector Board (keyboard models)–Digital Interface (page 2 of 3) .....................................................................7-11Connector Board (keyboard models)–Power Supply/Audio (page 3 of 3).......................................................... 7-12Slider Board (keyboard models)–Sliders ................................................................................................................... 7-13Right Front Panel Board (rack models)–FP Buttons and LEDs (page 1 of 2) ....................................................... 7-14Left Front Panel Board (rack models)–Controllers, FP Buttons and LEDs (page 2 of 2) .................................... 7-15Connector Board (rack models)–Scanner (page 1 of 3)............................................................................................ 7-16Connector Board (rack models)–Digital Interface (page 2 of 3) ............................................................................. 7-17Connector Board (rack models)–Power Supply/Audio (page 3 of 3) ................................................................... 7-18Power/Volume/Headphone Board (rack models) .................................................................................................. 7-19

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Contents

vi

Chapter 1Introduction

This chapter provides the service technician with a layout of the front and rear panel features, as well as a brief explanation of thier functions. For in-depth descriptions of the many features the PC2 Series instruments include, consult the Musician’s Guide.

This chapter also includes a description of the models available in the PC2 Series and a description of the symbols used throughout this manual.

Note: If possible, all user programs and setups should be saved prior to opening the unit, entering the Boot Block to run diagnostics or to perform a hard reset. For instructions to save all user programs and setups, see Saving User Data in Chapter 5, page 5-1.

ModelsThere are three models in the PC2 series. The available models are listed below.

• PC2, 76-note keyboard• PC2X, 88-note keyboard• PC2R, rack-mount

Notes, Cautions, WarningsPlease pay special attention to all Notes, Cautions, and Warnings used throughout this manual as they not only point out specific instructions, but also alert you to differences between the PC2R rack units, the 76-note PC2 keyboard, and the 88-note PC2X keyboard. Certain chapters and sections are solely for the rack or keyboard units. Other chapters combine both the rack and keyboard units.

A brief description of these symbols follows:

Note: Provides additional information, indicates differences between models, and emphasizes specific instructions.

Caution: Instructs you to proceed cautiously so that damage does not occur to the unit or individual components.

Warning: Alerts you so that damage does not occur to yourself, others, or external devices.

1-1

Introduction

PC2/PC2X

PC2/PC2X

PC2/PC2X Rear Panel

Figure 1-1 PC2 rear panel features

Rear Panel FeaturesPower Switch—Rocker switch to turn the power on and off.

Power Connector—Keyed four-pin connector to attach the Kurzweil 9VDC power adapter.

MIDI Select Switch—Slide switch to select the operation of the MIDI Thru/Out port. This switch is recessed into the rear panel so that it cannot be accidentally changed.

MIDI Ports—In, Thru/Out, and Out ports to connect the PC2 to other MIDI devices to receive, pass, and send MIDI data.

LCD Contrast—Rotary potentiometer to adjust the LCD for the best visibility.

Digital Out—RCA jack to connect to digital recorders and mixers.

Switch Pedals—Three 1/4” jacks to connect switch pedals that can be assigned to control operations such as sustain, sostenuto, etc. (use 1/4” tip/sleeve).

Continuous Control Pedals—Two 1/4” jacks to connect pedals that can be assigned to control operations such as volume, expression, etc. (use 10KΩ linear taper potentiometer, 1/4” tip/ring/sleeve).

Breath Input—A 3.5mm jack to connect a standard breath controller.

Ribbon Input—Modular jack to connect the Kurzweil Ribbon Controller option.

Audio Outs—Balanced 1/4” left and right audio output jacks to connect to an amplifier, mixer or sound system.

Headphones—Standard 1/4” jack to connect headphones.

Thru / OutThru / Out In

Digital

ContrastLCDOut

SwitchOut1

Continuous

132

Breath

2 Right

Ribbon

Left Headphones

Power MIDI Pedals Inputs Audio OutsI / 0 Adapter In

9.0V 2.0A14.0V~0.25A

SwitchPedals

LCDContrast

MIDIPorts

MIDISelect Switch

BreathInput

DigitalOut

AudioOuts

ContinuousControl Pedals

Headphones

PowerConnector

PowerSwitch

RibbonInput

1-2

Introduction

PC2/PC2X

PC2/PC2X Front PanelFigure 1-2 is an illustration of the front panel for the PC2 and the PC2X. Enlargements of sections of this illustration follow, as well as a brief description of the front panel features.

Figure 1-2 PC2/PC2X Front Panel layout

Front Panel Features

Figure 1-3 Master Volume, Zone Select and Assignable Controllers section

Demo

1 2 3

4 5 6

7 8 9

+ / - 0 Clear

Cancel Enter1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

Solo

EQ

Zone 1 Zone 2 Zone 3 Zone 4

SW1

SW2

SW3

MasterVolume

Internal

MIDI Xmit Program Key Range Timbre Envelope LFO

Compare Copy Store

Global MIDI Recv Panic

Velocity Controllers Arpeggiator

Transpose

User Exp 1 Exp 2

InternalVoices

PreviousGroup

NextGroup VoicesStrings

Piano 2Piano 1

Guitar

E Piano 1

Bass Drums

E Piano 2

Percussion

Pop Keys Clavier Organ

Synths

Brass

Pads

FX-A Select Wet / Dry

FX-B Select FX ModeLow

Mid

High

Main Layer Split Split Layer

Octave Shift

Split Point

Mute A

Mute B

Zone Select and Assignable Controllers

Sound / Setup Select

Zone Parameters

Sound Source

Sound Parameters

Functions

System

Effects and Reverb

Data Entry

16'2 2/3'

Perc On / Off Volume Decay Pitch

RotaryFast / Slow

DrawbarToggle

Chorus / VibOn / Off

Chorus / VibDepth

5 1/3'2'

8'1 3/5'

4'1 1/3'

KB3Mode

UPPER / lower 0 - 9 Space

No Yes

S T U V W X Y Z

J K L M N O P Q R

A B C D E F G H I

A B C D

MIDISetups

Effectsand

Reverb

ZoneParameters

SoundParameters

Sound/SetupSelect

System

SoundSource

Sound/SetupSelect

LCD andcursor buttons

MasterVolume

Alpha Wheel, Minus (-) and Plus (+) buttons,

Alphanumeric keypad

Solo

EQ

Zone 1 Zone 2 Zone 3 Zone 4

SW1

SW2

SW3

MasterVolume

Low

Mid

High

Main Layer Split Split Layer

Octave Shift

Split Point

Zone Select and Assignable Controllers

16'2 2/3'

Perc On / Off Volume Decay Pitch

RotaryFast / Slow

DrawbarToggle


Chorus / VibDepth

5 1/3'2'

8'1 3/5'

4'1 1/3'

A B C D

1-3

Introduction

PC2/PC2X

Master Volume—Slidepot to adjust the overall volume.

Zone Select and Assignable Controllers—The operation of the buttons and sliders in this section depends on which of the three performance modes is active. Their labelling is color-coded to identify their function in each of the performance modes. They are labelled as follows: white–Internal Voices mode, blue–MIDI Setups mode, and orange–KB3 mode.

Figure 1-4 PC2 Front Panel, center section

LCD—Forty-character, two-line liquid crystal display.

Cursor buttons—These buttons move the cursor bar in the LCD. Generally, they select bank and program ID parameters and some KB3 settings.

Zone Parameters—Each button in this section represents a menu of available parameters for use while editing setups.

Sound Source—Each button in this section selects a bank of programs or setups for each of the performance modes.

Sound Parameters—Each button in this section represents a menu of available parameters for use while editing programs in the Internal Voices and KB3 modes.

Functions—Use the buttons in this section while editing programs or settings to compare between an original and a modified setup or program, copy sections from one setup to another, and begin the process to store the changes.

System—The three buttons in this section select parameters that affect the entire unit. The Global button opens a menu of parameters such as: checking the version of the operating system, available memory, performing a reset, dumping all objects, and running MIDIScope. The MIDI Receive button opens a menu to configure individual MIDI channels. The Panic button sends an All Notes Off message to the PC2 and the MIDI Out port. On power up, the Panic button is also used to enter the boot block to perform diagnostics, operating system updates, etc.

Internal

MIDI Xmit Program Key Range Timbre Envelope LFO

Compare Copy Store

Global MIDI Recv Panic

Velocity Controllers Arpeggiator

Transpose

User Exp 1 Exp 2

Zone Parameters

Sound Source

Sound Parameters

Functions

System

1-4

Introduction

PC2/PC2X

Figure 1-5 Sound/Setup Select and Effects and Reverb sections

Sound/Setup Select—Three groups of buttons are included in this section. Use the buttons in the first group to select one of the three performance modes: Internal Voices, MIDI Setups, or KB3 Mode. The second group, Previous Group and Next Group, is for use in the Internal Voices and MIDI Setups modes only. Depending on which mode you’re in, they select the previous or next group of programs or setups. Use the buttons in the third group, labelled 1–16, to select a category of Internal Voice programs or MIDI setups. In KB3 Mode, use these buttons to select one of the 16 KB3 programs.

Effects and Reverb—Use the buttons in this section to select from two blocks of effects to apply effects and reverb to programs and setups.

Figure 1-6 Data Entry section

Data Entry—This section contains the Alpha Wheel, Minus (-) and Plus (+) buttons, and the Alphanumeric keypad. Use the Alpha Wheel or the Minus (-) and Plus (+) buttons to increase or decrease a value. Use the buttons in the Alphanumeric keypad to enter text, numbers, spaces, etc. This section also includes the Cancel (No) and Enter (Yes) buttons.

Mod/Pitch Wheel Assembly (not shown)—Use the two wheels to vary modulation and pitch. Also included on the assembly is the SW4 and SW5 switches for use in the Internal Voices and MIDI Setups modes.

Demo

1 2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

InternalVoices

PreviousGroup

NextGroup VoicesStrings

Piano 2Piano 1

Guitar

E Piano 1

Bass Drums

E Piano 2

Percussion

Pop Keys Clavier Organ

Synths

Brass

Pads

FX-A Select Wet / Dry

FX-B Select FX ModeMute A

Mute B

Sound / Setup Select Effects and ReverbKB3

ModeMIDI

Setups

1 2 3

4 5 6

7 8 9

+ / - 0 Clear

Cancel Enter

Data Entry

UPPER / lower 0 - 9 Space

No Yes

S T U V W X Y Z

J K L M N O P Q R

A B C D E F G H I

1-5

Introduction

PC2R

PC2R

PC2R Rear Panel

Figure 1-7 PC2R rear panel

Rear Panel FeaturesAudio Outs—Balanced 1/4” left and right audio output jacks to connect to an amplifier, mixer or sound system.

Digital Out—RCA jack to connect to digital recorders and mixers.

MIDI Ports—In, Thru/Out, and Out ports to connect the PC2 to other MIDI devices to receive, pass, and send MIDI data.

MIDI Select Switch—Slide switch to select the operation of the MIDI Thru/Out port.

Power In—Keyed four-pin connector to attach the Kurzweil 9VDC power adapter.

PC2R Front PanelFigure 1-8 is an illustration of the front panel for the PC2R. Enlargements of sections of this illustration follow, as well as a brief description of the front panel features.

Figure 1-8 PC2R Front Panel

Digital OutIn Thru Out

Thru / Out

L R

MIDIAudio OutsManufacturer: Young Chang Co., Ltd.

Serial No.

Designed in USA Made in R.O.K.

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE(2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING

Power In

9.0V 2.0A14.0V~0.25A

Model: PC2R PC2R®

MIDIPorts

MIDISelect Switch

PowerIn

DigitalOut

AudioOuts

Demo

Performance

Rotary Fast / Slow Perc On / Off Volume Decay Pitch

Edit ModesKB3

16'

2 2/3'

5 1/3'

2'

8'

1 3/5'

4'

1 1/3'


Pre-AmpDrawbar Toggle 1' Chorus / VibDepth

Edit / Store Group / Menu Compare Copy

Cancel Enter FX MIDI Receive Global

YesNo

Internal VoicesSplit Split LayerSolo

Shift

Main LayerVOLPWRPUSH PC2R

MIDI SetupsZone 1 Zone 2 Zone 3 Zone 4

Panic

A B C D

LCDHeadphones

Power/Volume Edit ModesPerformance

LCDContrast

1-6

Introduction

PC2R

Front Panel FeaturesPower/Volume—Push to turn the power on/off and turn it to adjust the volume.

Headphones—Standard 1/4” jack to connect headphones.

Performance section—The buttons and knobs in this section are multi-function and their operation depends on which performance mode is active (Internal Voices, KB3, or MIDI Setups). Their labelling is color-coded to identify their operation for each of the performance modes. They are labelled as follows: white–Internal Voices mode, blue–MIDI Setups mode, and orange–KB3 mode.

Figure 1-9 Power/Volume, Headphones and Performance section

The top row of buttons are for use in each of the three performance modes. The button LEDs are tri-colored: Red, Green, and Amber. The function of a button depends on which performance mode is active and the LED color. In the Internal Voices mode, use these buttons to enter AutoSplit mode to add layers and splits. In MIDI Setups mode, use these buttons to solo a zone or select a zone for viewing or editing. In KB3 mode, these buttons control the effects for the current KB3 program. Figure 1-9 is an enlargement of the Performance section. An example of the operation of the Split button in each performance mode follows:

Internal Voices mode, selecting the Split button switches to AutoSplit mode and adds a new sound below a preset split point.

MIDI Setups mode (Zone 3), selecting the Split button selects Zone 3.

KB3 mode (Decay), selecting the Split button switches between fast and slow decay for the percussion effect.

The bottom row includes the Shift button and Knobs A–D. The Shift button controls the operation of Knobs A–D. The Shift button LED is also tri-colored (green, amber, and red). The function of Knobs A–D depends on which performance mode is active and the LED color. In Internal Voices or MIDI Setups mode, Knobs A–D control parameters and settings. In KB3 Mode, Knobs A–D control such functions as drawbar lengths, etc.

Edit section—Use the eight buttons and the Alpha Wheel in this section to select programs and setups, and editing functions. Turn the Alpha Wheel to scroll through menus and categories to select a program or parameter. In Internal Voices and KB3 mode, use the Left and Right cursor buttons to select bank and program ID parameters, as well as some KB3 settings. While editing use these buttons to make selections.

Performance

Rotary Fast / Slow Perc On / Off Volume Decay Pitch

16'

2 2/3'

5 1/3'

2'

8'

1 3/5'

4'

1 1/3'


Pre-AmpDrawbar Toggle 1' Chorus / VibDepth

Split Split LayerSolo

Shift

Main LayerVOLPWRPUSH Zone 1 Zone 2 Zone 3 Zone 4

A B C D

1-7

Introduction

PC2R

Figure 1-10 Edit section

Select the Edit/Store button to enter the edit mode for the current performance mode to edit programs, setups, etc. To save the changes, press the Edit/Store button again to enter the save dialog. In a performance mode, press the Group/Menu button to select a category of programs or setups. In edit mode, press the Group/Menu button to view the menu of parameters.

When editing, the Compare button lets you hear the difference between an original and a modified setup or program. The Copy button allows you to copy sections from one setup to another. The Cancel (No) button exits an edit mode or answers no. In a performance mode, the Enter (Yes) button selects a program or setup and answers yes. In an edit mode, press Enter to enter menus for editing.

Modes section—Use the buttons in this section to select one of the three performance modes: Internal Voices, KB3, or MIDI Setups. Three special mode buttons (FX, MIDI Receive, and Global) are also included in this section. The special mode buttons perform as follows: press the FX button to enter the effect edit mode, press the MIDI Receive button to configure individual MIDI channels, and press the Global button to select parameters that change the entire PC2R. Many helpful parameters are included in the Global menu such as: the operating system version, available memory, reset, dumping all objects, and MIDIScope.

Figure 1-11 Modes section and LCD Contrast

The Modes section also contains buttons to select the Panic function and Demo mode. These buttons are not individual buttons. They are selected by simultaneously pressing two buttons. To select the Panic function to send an All Notes Off message, simultaneously press the KB3 and the MIDI Setups buttons. To enter the Demo mode, simultaneously press the MIDI Receive and the Global buttons. Flashing LEDs in the Performance section indicate the location of the stored demos.

LCD Contrast—Rotary potentiometer to adjust the LCD for the best visibility.

EditEdit / Store Group / Menu Compare Copy

Cancel Enter

YesNo

Demo

ModesKB3

FX MIDI Receive Global

Internal Voices MIDI Setups

Panic

1-8

Chapter 2Diagnostics

Diagnostic TestsThe following lists the diagnostic tests available for the PC2 Series.

• ROM• Read-write• RAM• MABEL• LISA• Sound ROM• ZRAM• MIDI• LED

If a PCX-1 Board is installed, the following tests are also available:

• PCX-1 ROM• PCX-1 RW• PCX-1 RAM• PCX-1 MABEL• PCX-1 SROM

Warning: Some diagnostic tests erase user programs and setups. If possible, be sure to save all user programs and setups, before entering diagnostics. For instructions, refer to Saving User Data in Chapter 5, page 5-1.

2-1

Diagnostics

Entering Diagnostics

Entering Diagnostics1. Apply power to the unit. When the Please wait... message appears in the LCD,

quickly press and release the Panic button for PC2 keyboard units or the Edit button for PC2R rack units. The LCD should display the following:

Figure 2-1 LCD example, entering diagnostics

2. Press either the Left or Right cursor button until Run diagnostics appears in the LCD.

3. Press the Enter button.

4. The LCD displays the following:

Figure 2-2 LCD example, diagnostic main menu

5. Press Enter to select the run one test mode. To select the run burn-in test mode, press either the Left or Right cursor button then press the Enter button to begin the tests.

Diagnostic Test Modes

Run One TestRun One Test allows you to select an individual test, or to step through and run each available test. To step through the different tests, use the Left or Right cursor button. Press the Enter button to select the test.

Figure 2-3 LCD example, Run One Test

Main menu

Install engine

Main menu

Run one test

Select test to run

ROM test

2-2

Diagnostics

Test Results

At the completion of a test, whether pass or fail, press the Cancel button to exit the test. Press either the Left of Right cursor button to advance to the next test or another test in the sequence.

At the completion of a test, press the Cancel button to return to the test menu. To exit diagnostics, turn the power off and on to return to normal operation.

Run Burn-inBurn-in continuously runs the following sequence of tests.

• ROM• Read-write• Sound ROM• ZRAM• MIDI

If a PCX-1 Board is installed, the sequence of tests is as follows:

• ROM• Read-write• MIDI• PCX-1 ROM• PCX-1 read

The LCD displays the test results at the completion of each test. To stop the burn-in process and view the test results for each test run, press the Cancel button. Use the Left or Right cursor button to scroll through the results of each test.

To exit Run Burn-in and return to the main menu, press the Cancel button. To exit diagnostics, turn the power off and on to return to normal operation.

Note: If a PCX-1 Board is installed, you must cycle the power after running the SROM or PCX-1 SROM tests. If you do not cycle the power, some tests may not run properly.

Test ResultsThe top line of the LCD displays the test name to the left and test result to the right. Additional information, if any, is displayed on the bottom line of the LCD.

At the completion of an individual test, the LCD displays the test results. An expected result is Pass, Fail, or Not Run.

If a failure occurs, the LCD displays Fail. To the right of Fail, two characters can be displayed in parenthesis. These characters indicate the type of failure. If the test fails a (t) is displayed. If a hardware error occurs an (H) is displayed.

2-3

Diagnostics

Description of Tests


ROMThis test checks the software data (engine, boot, and setups) stored in FlashROM on the Engine Board.

A failure of this test may indicate a problem with the Flash ROM chip (U5 on the Engine Board), associated circuitry, or the Engine Board.

Read-writeThis test is a combination of the RAM, MABEL and LISA tests. The Read-write test writes data to RAM and the MABEL and LISA registers then confirms that the data written can be read back successfully.

A failure of this test indicates a problem with the Engine Board.

RAMThe RAM test writes to the microprocessor RAM space and verifies that the write was successful.

A failure of this test may indicate a problem with the RAM or related circuitry on the Engine Board.

MABELThis test performs a read-write of the MABEL registers and verifies that the data written can be read back successfully.

A failure of this test may indicate a problem with a MABEL, related circuitry or the Engine Board.

LISAThis test confirms that the Lisa chip (U15) is properly installed and successfully interfacing with the microprocessor.

A failure of this test indicates a problem with Lisa, related circuitry or the Engine Board.

Sound ROMThis test confirms that the Sound ROMs can be read by the MABELs by performing a checksum of the Sound ROMs. The computed checksum is then compared to the stored checksum.

A failure of this test may indicate a problem with a Sound ROM (U19 or U20), or the Engine Board.

2-4

Diagnostics


ZRAMThis test performs a quick read-write of the internal RAM and verifies that the data was successfully written and retained.

A failure of this test may indicate a problem with the RAM or the Engine Board.

MIDIThe MIDI test performs a loop-back of the serial port by sending a 23-byte pattern over the external MIDI link. This test requires a MIDI loop (a MIDI cable that connects two MIDI jacks). The test will fail if a MIDI cable is not connected between two MIDI jacks. Be sure to run this test with MIDI cables connected as follows:

Note: Be sure to use a known working MIDI cable!

1. Connect a MIDI cable to the MIDI In and MIDI out jacks and run the test.

2. Connect a MIDI cable to the MIDI In and MIDI Out/Thru jack and set the Out/Thru switch on the rear panel to Out. Run the test.

A failure of this test could be caused by failure of the serial port, other MIDI circuitry, or a problem on the Connector Board or the Engine Board.

LEDThis test lights all the front panel LEDs. To complete the test and obtain the test result, press the Cancel button. When the Cancel button is pressed the LEDs shut off and the test result is shown.

A failure of this test may indicate a problem with the Front Panel Board(s), related circuitry or the Connector Board.

PCX-1 ROMThis test checks the software data (engine, boot, and setups) stored in FlashROM on the PCX-1 Board.

Failure of this test may indicate a problem with the Flash ROM chip (U5 on the PCX-1 Board), associated circuitry, or the PCX-1 Board.

PCX-1 RWThis test is a combination of the RAM, MABEL and LISA tests. This test writes data to RAM and the MABEL and LISA registers then confirms that the data written can be read back successfully.

A failure of this test indicates a problem with the PCX-1 Board.

PCX-1 RAMThe PCX-1 RAM test writes to the microprocessor RAM space and verifies that the write was successful.

A failure of this test may indicate a problem with the RAM or related circuitry on the PCX-1 Board.

2-5

Diagnostics


PCX-1 MABELThis test performs a read-write of the MABEL registers and verifies that the data written can be read back successfully.

A failure of this test may indicate a problem with a MABEL, associated circuitry or the PCX-1 Board.

PCX-1 SROMThe PCX-1 SROM test verifies that the PCX-1 MABELs can read the Sound ROMs by performing a checksum of the Sound ROMs. The computed checksum is then compared to the stored checksum.

A failure of this test indicates a problem with a Sound ROM (U15 or U16) or the PCX-1 Board.

2-6

Chapter 3PC2R Disassembly/Assembly

IntroductionThis chapter contains all the procedures for the disassembly and reassembly for the PC2R—as well as instruments with factory-installed or after-market options.

Warning: If possible, save all user programs and setups before disassembly. For instructions, refer to Saving User Data in Chapter 5, page 5-1.

Cables, Connectors

Flat Ribbon CablesAll flat ribbon cables with connectors are keyed, and therefore cannot be reversed. Most flat ribbon cables have locking cable clips. Be sure to reapply the clips when connecting cables. Flat ribbon cables that connect to picoflex connectors do not have locking cable clips.

Some flat ribbon cables have exposed wires that insert directly into a wire trap connector. When disconnecting and connecting these cables, you must look for the marking on the edge of the cable denoting Pin 1 and be sure that you match it correctly with Pin 1 on the board.

Cable RoutingIn some cases, tape secures cable connections or fastens cables to the bottom enclosure. Always peel back the tape from one side when disconnecting cables so that the tape remains properly positioned.

Required Tools and Materials• No. 1 Phillips head screwdriver• No. 2 Phillips head screwdriver• Small flat screwdriver• Needle-nose pliers

3-1

PC2R Disassembly/Assembly

Opening the PC2R

Opening the PC2R

Removing the Top CoverBefore you begin disassembly, please be sure that the power is off, and that the AC power adapter and all other cables are disconnected.

The top cover is secured to the PC2R with seven screws: three on the top, one on each side, and two on the rear. See Figure 3-1.

Figure 3-1 PC2R top cover

1. Remove the seven screws that secure the top cover.

Figure 3-2 Removing the top cover

2. Refer to Figure 3-2. Slide the top cover back from the Front Panel Assembly to release the top cover from the bottom enclosure, and place the top cover safely aside to avoid damage.

Replacing the Top Cover1. Place the top cover in position and slide it toward the Front Panel Assembly.

2. Install the seven screws that secure the top cover. See Figure 3-1.

3-2


Opening the PC2R

Removing the Connector Board1. Following Steps 2– 5, disconnect the cables listed in Table 3-1.

2. Disconnect the stranded wire cable from J301 on the Connector Board.

3. Remove the cable locking clip and disconnect the flat ribbon cable from J304. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

4. Disconnect the stranded wire cable from J322.

5. The flat ribbon cables connected to J302 and J303 use wire trap connectors. The shielding has been removed from these cables to expose the wires. The wires are directly inserted into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Connector Board.

6. Remove the two screws that secure the MIDI jacks to the rear panel.

7. Remove the two nuts that secure the 1/4” audio out jacks to the rear panel.

8. Remove the three screws that secure the Connector Board to the bottom enclosure.

Caution: VR1 on the Connector Board is attached to the heat sink. When you remove the Connector Board and heat sink, be sure to keep the board and heat sink stable so that you do not damage VR1 or its connection.

9. Remove the four screws that secure the heat sink to the bottom enclosure.

10. Slide the Connector Board and heat sink away from the rear panel and toward the Front Panel Assembly. This will free the jacks and MIDI switch from their positions on the rear panel.

11. Tilt up the rear panel edge of the Connector Board and heat sink. Carefully lift the board and heat sink out of the PC2R, and place them on a flat protected surface.

Ref. Name Cable Type Destination

J301 PC2 Power stranded wire Engine Board

J302 PC2R Audio In flat ribbon Engine Board

J303 MIDI/CPU flat ribbon Engine Board

J304 Front Panel flat ribbon Right Front Panel Board

J322 FP/Vol/Pwr/Hp stranded wire Headphone/Vol/Pwr Sw Board

Table 3-1 Connector Board cables

3-3


Opening the PC2R

Replacing the Connector Board1. Tilt down the inner edge (closest to the Front Panel Assembly) of the Connector Board and

heat sink, and place it flat on to the bottom enclosure.

2. Slide the Connector Board and heat sink toward the rear panel so that the jacks and MIDI switch are positioned through their openings in the rear panel.

3. Install the four screws that secure the heat sink to the bottom enclosure.

4. Install the three screws that secure the Connector Board to the bottom enclosure.

5. Install the two screws that secure the MIDI jacks to the rear panel.

6. Install the two nuts that secure the 1/4” audio out jacks to the rear panel.

7. Connect the wire trap flat ribbon cables in the following order.

Caution: Be sure to look for the marking on the edge of the cable denoting Pin 1 and that you match it correctly with Pin 1 on the board. Make certain that the wires are straight prior to inserting them into the connector and that each wire is correctly inserted into its respective position.

Note: Be sure the sides of the connector are lifted. Insert the flat ribbon cables into the wire trap connectors and push down the sides of each connector to lock the cable into the connector. Gently pull each cable to verify that it is locked into its connector.

Insert the five-wire flat ribbon cable from the Engine Board into the wire trap connector at J302 on the Connector Board.

Insert the ten-wire flat ribbon cable from the Engine Board into the wire trap connector at J303 on the Connector Board.

8. Connect the stranded wire cable from the Headphone/Volume/Power Switch Board to J322.

9. Connect the flat ribbon cable from the Right Front Panel Board to J304. Be sure to install the cable locking clip.

10. Connect the stranded wire cable from the Engine Board to J301.

3-4


Opening the PC2R

Removing the Polyphony Expansion Board (PCX-1)The Polyphony Expansion Board is mounted onto the Engine Board and held in place with four nylon PC board standoffs and a 24-pin female connector on the underside of the board. It is also secured to the bottom enclosure with two screws.

1. Remove the two screws that secure the PCX-1 Board to the bottom enclosure.

2. Squeeze the top of one of the four nylon PC board standoffs, and lift the corner of the board until it clears that standoff. Repeat for the other three standoffs.

3. When the board is free of the standoffs, lift the board straight up to disconnect the 24-pin connector from the Engine Board.

Figure 3-3 Removing the Polyphony Expansion Board (PCX-1)

Replacing the Polyphony Expansion Board (PCX-1)There are two cables routed underneath the PCX-1 Board: a flat ribbon cable from the LCD to the Engine Board, and a stranded wire cable from the Headphone/Volume/Power Switch Board to the Connector Board. Before you replace the PCX-1 Board, be certain that these cables are properly positioned.

1. Place the PCX-1 Board over the four standoffs. This should properly position the 24-pin connector over the 24-pin header on the Engine Board.

2. Press the PCX-1 Board down, securing the 24-pin connector, and snapping the board onto the standoffs.

Note: If you are installing a new PCX-1 Board, check the old board for Sound ROM options. If the unit has Sound ROM options, be sure to install them on the new board.

3. Install the two screws that secure the PCX-1 Board to the bottom enclosure.

24-pin male headeron Engine board

24-pin female connectoron PCX-1 board

3-5


Opening the PC2R

Removing the Engine Board1. If the PC2R you are servicing has a PCX-1 Board installed, remove it following the

procedure described on page 3-5.

2. Following Steps 3–6, disconnect the cables listed in Table 3-2.

3. Remove the cable locking clip and disconnect the flat ribbon cable from J304 on the Connector Board. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

4. The flat ribbon cables connected to J403 and J412 use wire trap connectors. The shielding has been removed from these cables to expose the wires. The wires are directly inserted into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Engine Board.

5. Remove the cable locking clip and disconnect the flat ribbon cable from location J406 on the Engine Board. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

6. Disconnect the stranded wire cables from locations J402 and J405 on the Engine Board.

7. Remove the five screws that secure the Engine Board to the bottom enclosure and remove the Engine Board.

Replacing the Engine Board1. Place the Engine Board on the bottom enclosure.

2. Install the five screws that secure the Engine Board to the bottom enclosure.

3. Connect the stranded wire cable from the Connector Board to J402.

4. Connect the stranded wire cable from the LCD Board to J405.

5. Connect the flat ribbon cable from the LCD Board to J406. Be sure to install the cable locking clip.



J304 Front Panel flat ribbon RIght Front Panel to Connector

J402 PC2 Power stranded wire Connector Board

J403 MIDI/CPU flat ribbon Connector Board

J405 Backlight stranded wire LCD Board

J406 LCD flat ribbon LCD Board

J412 PC2 Audio Out flat ribbon Connector Board

Table 3-2 Engine Board cables

3-6


Opening the PC2R



Insert the five-wire flat ribbon cable from the Connector Board into the wire trap connector at J412 on the Engine Board.

Insert the ten-wire flat ribbon cable from the Connector Board into the wire trap connector at J403 on the Engine Board.

7. Connect the flat ribbon cable from the Right Front Panel Board to J304 on the Connector Board. Be sure to install the cable locking clip.

8. If you removed a PCX-1 Board, install it following the procedure on page 3-5.

3-7


Front Panel Assembly

Front Panel AssemblyThe Front Panel Assembly consists of the front panel faceplate, a mounting bracket for the front panel boards, and four printed circuit boards. The boards mounted on the Front Panel Assembly are the Right Front Panel, LCD, Left Front Panel, and Headphone/Volume/Power Switch.

Removing the Front Panel AssemblyRefer to Figure 3-4. The bottom edge of the Front Panel Assembly and front edge of the bottom enclosure connect to form a lip.

Figure 3-4 Front Panel Assembly and bottom enclosure

1. Tilt up the front edge of the PC2R.

2. Using a #1 screwdriver, remove the four screws that secure the Front Panel Assembly to the bottom enclosure.

Note: Before continuing, be sure that you have a soft surface to rest the Front Panel Assembly on so that the front panel switches, jacks, and rotary potentiometers are not damaged.

3. Slide the Front Panel Assembly forward and away from the bottom enclosure.

Caution: There are four cables connected to the Front Panel Assembly. You do not need to disconnect these cables.

Replacing the Front Panel Assembly1. Position the Front Panel Assembly so that its bottom edge is under the front edge of the

bottom enclosure.

2. Tilt up the front edge of the PC2R and install the four black flat head machine screws.

Lip

3-8



Removing the Front Panel Faceplate

Note: If the service you are performing only requires that you have access to the front panel boards for component testing, component replacement or installing a replacement board, it is not necessary to remove the front panel faceplate. Refer to the procedure for the front panel board you need to remove and follow the steps described.

1. Follow the procedure to remove the Front Panel Assembly.

2. Refer to Figure 3-5 on page 3-10. Four flat head machine screws secure the front panel faceplate to the Front Panel Assembly. These screws are located along the top of the Front Panel Assembly.

Using a #1 screwdriver, remove the four screws.

3. Place the front panel faceplate safely aside to avoid accidental damage.

Replacing the Front Panel Faceplate1. Position the front panel faceplate onto the Front Panel Assembly.

Note: Verify that the rotary potentiometers, jacks, and switch button caps are correctly positioned through their openings in the front panel faceplate. Turn the rotary potentiometers to be sure that they move freely; and push the switch button caps to be sure that their corresponding switches click.

2. Install the four flat head machine screws that secure the front panel faceplate to the Front Panel Assembly.

Front Panel BoardsThe front panel boards are secured to a mounting bracket. This bracket is secured to the front panel faceplate.

If the service you are performing only requires that you have access to the front panel boards for component testing, component replacement or installing a replacement board, it is not necessary to remove the front panel faceplate or remove the boards from the mounting bracket.

Figure 3-5 shows the position of the boards on the Front Panel Assembly and the placement of the front panel faceplate screws located above the boards. Refer to the procedure for the front panel board you need to remove and follow the steps described.

3-9



Figure 3-5 Front panel faceplate screw locations

Removing the Right Front Panel Board1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to

disconnect all the cables that connect the Front Panel Assembly boards to boards located on the bottom enclosure.

2. Remove the cable locking clip and disconnect the flat ribbon cable from J601 on the Right Front Panel Board.

3. Disconnect the flat ribbon cable from J602. This cable uses a picoflex molex connector. To disconnect it, grip the connector and pull it out straight.

Caution: Do not wiggle the connector back and forth. Doing so, could cause damage to the header.

Note: Be aware of the marking (red or black) on the cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the board.

4. It is not necessary to remove the front panel faceplate to remove the Right Front Panel Board. Two of the screws that secure the front panel faceplate to the Front Panel Assembly are located above the Right Front Panel Board. Refer to Figure 3-5 and remove the two screws.

5. Remove the three screws that secure the Right Front Panel Board to the mounting bracket, and remove the Right Front Panel Board.

Right FrontPanel Board

LCDBoard

Left FrontPanel Board

Headphone/Volume/Power Switch Board

faceplate screws

3-10



Replacing the Right Front Panel Board1. Place the Right Front Panel Board in position on the mounting bracket and line up the

screw holes.

Note: Verify that the rotary potentiometers and switch button caps are correctly positioned through their openings in the front panel faceplate. Turn the rotary potentiometers to be sure that they move freely; and push the switch button caps to be sure that their corresponding switches click.

2. Install the three screws that secure the board to the mounting bracket.

3. Install the two screws that secure the front panel faceplate.

4. Connect the flat ribbon cable from the Connector Board to Right Front Panel Board, location J601. Be sure to install the cable locking clip.

5. Connect the flat ribbon cable from the Left Front Panel Board to the Right Front Panel Board, location J602.

Caution: The side walls of the picoflex header are different. The Pin 1 side is slightly wider than the other side; and the corresponding sides of the connector incorporate the differences. When you connect the cable, be sure to orient the marking (red or black) on the cable that indicates the connection to Pin 1 on the board to prevent damage to the header or a failure caused by an improper connection.

6. Follow the procedure on page 3-8 to install the Front Panel Assembly.

Removing the LCD Board1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to


2. Disconnect the stranded wire cable soldered to the LCD Board from location J405 on the Engine Board.

3. Remove the locking cable clip and disconnect the flat ribbon cable soldered to the LCD Board from location J406 on the Engine Board. If the unit you are servicing has a PCX-1 Board installed, this cable is routed underneath the PCX-1 Board.

After you disconnect the cable, carefully slide it so that it is positioned close to the left edge of the PCX-1 Board (left edge as viewed standing at the front panel). Gently pull the cable toward the Front Panel Assembly to completely free it from underneath the PCX-1 Board.

4. It is not necessary to remove the front panel faceplate to remove the LCD Board. One screw that secures the faceplate to the Front Panel Assembly is located above the LCD Board. Refer to Figure 3-5 and remove the screw.

5. Remove the two screws that secure the LCD Board to the mounting bracket, and remove the LCD.

3-11



Replacing the LCD Board1. Place the LCD Board in position over the mounting standoffs on the mounting bracket.

2. Install the two screws that secure the LCD Board to the mounting bracket.

3. Install the screw that secures the front panel faceplate to the Front Panel Assembly.

4. Connect the stranded wire cable from the LCD Board to location J405 on the Engine Board.

5. If the unit you are servicing has a PCX-1 Board installed, route the flat ribbon cable beneath the board and connect it to location J406 on the Engine Board. Be sure to install the cable locking clip.


Removing the Left Front Panel Board1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to


2. Disconnect the flat ribbon cable from J603. This cable uses a picoflex molex connector. To disconnect it, grip the connector and pull it out straight.

Caution: Do not wiggle the connector back and forth. Doing so, could cause damage to the header.

Note: Be aware of the marking (red or black) on the cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the board.

3. It is not necessary to remove the front panel faceplate to remove the Left Front Panel Board. One screw that secures the front panel faceplate to the Front Panel Assembly is located above the Left Front Panel Board. Refer to Figure 3-5 and remove the screw.

4. Remove the two screws that secure the Left Front Panel Board to the mounting bracket.

5. Refer to Figure 3-6. This illustration shows the location of a soldered connection between the Left Front Panel and Headphone/Volume/Power Switch Boards. To remove the board, desolder this connection from the Left Front Panel Board.

Note: This illustration shows the Headphone/Volume/Power Switch Board lying flat to indicate the connection between it and the Left Front Panel Board. In its normal position, it is perpendicular to the Left Front Panel Board.

3-12



Figure 3-6 Left Front Panel and Headphone/Volume/Power Switch Board connection

6. Remove the Left Front Panel Board.

Replacing the Left Front Panel Board1. Place the Left Front Panel Board in position on the mounting bracket and line up the

screw holes.

2. Install the two screws that secure the board to the mounting bracket.

Note: Verify that the rotary potentiometers and switch button caps are correctly positioned through their openings in the front panel faceplate. Turn the rotary potentiometers to be sure that they move freely; and push the switch button caps to be sure that their corresponding switches click.

3. Install the screw that secures the front panel faceplate.

4. Connect the flat ribbon cable from the Right Front Panel Board to the Left Front Panel Board, location J603.

Caution: The side walls of the picoflex header are different. The Pin 1 side is slightly wider than the other side; and the corresponding sides of the connector incorporate the differences. When you connect the cable, be sure to orient the marking (red or black) on the cable that indicates the connection to Pin 1 on the board to prevent damage to the header, connector or a failure caused by an improper connection.

5. Refer to Figure 3-6. Solder the wire connection from the Headphone/Volume/Power Switch Board to the location indicated on the Left Front Panel Board.


J604

J603

Circuit side

1

Left Front Panel Board HP/Vol/Pwr SwBoard

1J2J1

solderedconnection

3-13



Removing the Headphone/Volume/Power Switch Board1. Remove the Front Panel Assembly, as described on page 3-8. It is not necessary to


2. Follow the procedure on page 3-9 to remove the front panel faceplate.

3. Disconnect the stranded wire cable that connects the Headphone/Volume/Power Switch Board to the Connector Board.

4. Remove the nut and flat washer that secure the headphone jack to the front panel mounting plate.

5. Remove the volume knob.

6. Remove the nut and flat washer that secure the volume/power switch to the front panel mounting plate.

7. Refer to Figure 3-6. This illustration shows the location of a soldered connection between the Left Front Panel and Headphone/Volume/Power Switch Boards. To remove the board, desolder this connection from the Headphone/Volume/Power Switch Board.

Note: This illustration shows the Headphone/Volume/Power Switch Board lying flat to indicate the connection between it and the Left Front Panel Board. In its normal position, it is perpendicular to the Left Front Panel Board.

8. Remove the Headphone/Volume/Power Switch Board.

Replacing the Headphone/Volume/Power Switch Board1. Position the Headphone/Volume/Power Switch Board on the mounting bracket.

2. Install the nut and washer that secure the headphone jack to the mounting bracket.

3. Install the nut and washer that secure the volume/power switch to the mounting bracket.

4. Install the volume knob.

5. Refer to Figure 3-6. Solder the wire connection from the Left Front Panel Board to Pin 5 of J2 on the Headphone/Volume/Power Switch Board.

6. Follow the procedure on page 3-9 to install the front panel faceplate.

Note: Be sure that the Volume/Power Switch moves freely.


3-14

Chapter 4PC2/PC2X Disassembly/Assembly

IntroductionThis chapter contains all the procedures for the disassembly and reassembly of both the 76-note PC2 and the 88-note PC2X—as well as instruments with factory-installed or after-market options. There are five main sections: Opening the PC2/PC2X, Top Enclosure, PC2 Keyboard Assembly, and PC2X Keyboard Assembly.

Warning: If possible, save all user programs and setups before disassembly. For instructions, refer to Saving User Data in Chapter 5, page 5-1.

Notes, Cautions, WarningsPlease pay special attention to all Notes, Cautions, and Warnings as they not only point out specific instructions, but also alert you to differences between the 76-note PC2 keyboard and the 88-note PC2X keyboard.

Cables, Connectors

Flat Ribbon CablesAll flat ribbon cables with connectors are keyed, and therefore cannot be reversed. Most flat ribbon cables have locking cable clips. Be sure to reapply the clips when connecting cables.



Required Tools and Materials• No. 1 Phillips head screwdriver• No. 2 Phillips head screwdriver• Small flat screwdriver• Dowel (3mm diameter)• Needle-nose pliers• Small blunt-end tool (Q-Tip, toothpick, etc.)• Foam blocks

4-1

PC2/PC2X Disassembly/Assembly

Opening the PC2/PC2X


PC2 BottomRefer to Figure 4-1. Arrows indicate the locations of the enclosure support wall, endcap and rear panel screws.

Figure 4-1 PC2 bottom enclosure

Caution: Do not remove the endcap or rear panel screws at this point of the procedure.

1. Tilt the PC2 up and remove the eight enclosure support wall screws.

2. Place the unit flat on your work surface.

3. Move the unit so that the rear panel portion of the unit hangs over the edge of your work surface. This gives you access to the seven screws that secure the rear panel portion of the top enclosure to the bottom enclosure. Remove the seven screws.

Note: Two of the rear panel screws also secure the rear panel portion of the access panel. It is not necessary to remove the five remaining access panel screws.

4. Slide the unit back onto the work surface.

Enclosure support wall screws

Rear panel screws

Rear panel

Keyboard

End

cap

scre

ws

Endcap screw

s

* *

*Endcap locking bracket screws

Access panel

4-2



PC2X BottomRefer to Figure 4-2. Arrows indicate the locations of the enclosure support wall, endcap and rear panel screws.

Figure 4-2 PC2X bottom enclosure

Caution: Do not remove the endcap or rear panel screws at this point of the procedure.

1. Tilt the PC2X up and remove the eight enclosure support wall screws.

2. Place the unit flat on your work surface.

3. Move the unit so that the rear panel portion of the unit hangs over the edge of your work surface. This gives you access to the nine screws that secure the rear panel portion of the top enclosure to the bottom enclosure. Remove the nine screws.

Note: Two of the rear panel screws also secure the rear panel edge of the access panel. It is not necessary to remove the five remaining access panel screws.

4. Slide the unit back onto the work surface.

Access panel

Rear panel screws

Rear panel

Keyboard

Endcap screw

s

*

End

cap

scre

ws

*

*Endcap locking bracket screws

Enclosure support wall screws

4-3



Removing the Top Enclosure1. Depending on the unit you are servicing, follow the procedures described on page 4-2 for

the PC2 bottom or page 4-3 for the PC2X bottom.

2. Refer to Figure 4-3.

Note: Figure 4-3 is an illustration of the PC2 rear panel. An illustration of the PC2X has not been included because the difference between the two is minimal. The quantity and position of the endcap screws is identical.

3. Remove the four screws that secure the endcaps to the rear panel.

Figure 4-3 PC2 rear panel

Caution: The following steps describe removing the left and right endcaps. To avoid damage to the endcaps, be sure to hold onto each endcap when removing the screws. When the endcap screws are removed, the endcap is free of the unit.

4. Refer to Figure 4-1 for the PC2 or Figure 4-2 for the PC2X. Move the unit so that one end hangs over the edge of your work surface. Remove the four endcap screws from the bottom enclosure. One of these screws secures the endcap locking bracket. When you remove the endcap locking bracket screw, the bracket remains loosely in the endcap assembly. Set the endcap safely aside. Repeat for the other endcap.

5. Refer to Figure 4-4. The bottom edge of the rear panel and back edge of the bottom enclosure connect to form a lip. The rear panel screws secure the lip.

Note: Figure 4-4 is an illustration of the PC2. An illustration of the PC2X has not been included because the difference between the two is minimal. The only difference is the spacing and quantity of the rear panel screws. If you are servicing a PC2, there are seven screws securing the rear panel portion of the top enclosure to the bottom enclosure. If you are servicing a PC2X, there are nine screws.

PC2Thru / OutThru / Out In

Digital

ContrastLCDOut

SwitchOut1

Continuous

132

Breath

2 Right

Ribbon

Left Headphones


9.0V 2.0A14.0V~0.25A

THIS DEVICE COMPLIES WITH PART 15 OF THE FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS: (1) THIS DEVICE MAY NOT CAUSE HARMFULINTERFERENCE, AND (2) THIS DEVICE MUST ACCEPT ANY INTERFERENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

Manufacturer: Young Chang Co., LTD.Made in ROK Serial No.

Endcap screws

Endcap screws

4-4



Figure 4-4 Top cover and bottom enclosure

Warning: Be sure to have your work surface prepared. This includes placing foam blocks behind the unit. When the top enclosure is removed, place it on the foam blocks to avoid damaging the Alpha Wheel, control panel buttons, and sliders. The following procedure requires enough room behind the rear of the unit to place the top enclosure face down on your work surface.

6. Grip each end of the top enclosure and rotate it back approximately two inches. This separates the bottom edges of the top enclosure and bottom enclosure.

7. Lift the top enclosure straight up.

8. Turn the top enclosure over and place it face down onto your work surface.

Caution: Table 4-1 lists the cables, by board location, from the top enclosure to the assembly they connect to on the bottom enclosure. You do not need to disconnect these cables.

Top cover Assembly Bottom Enclosure

Connector Board Keyboard Assembly

Connector Board Keyboard Assembly

FP Board Button Board/Wheel Assembly

Connector Board Mod Wheel Assembly

Table 4-1 Top cover and bottom enclosure cables

Rear panel screw locations

Lip

4-5



Replacing the Top Enclosure1. Position the top enclosure behind the bottom enclosure.

2. Move the top enclosure so that the bottom edge of the rear panel is positioned under the bottom enclosure edge. See Figure 4-4 on page 4-5.

Note: Verify that the cables listed in Table 4-1 are lying flat on the bottom enclosure. Be sure that all other cables are tucked between the top enclosure and the enclosure support walls.

3. Hold the top enclosure safely in place and move the unit so that one end of the rear panel edge hangs over the edge of your work surface and install the rear panel screw at that end. Slide the unit back onto your work surface. Repeat for other end. Refer to Figure 4-1 for the PC2 or Figure 4-2 for the PC2X.

Warning: Perform Steps 3 and 4 separately. Combining these steps could cause the top enclosure to flip away from the bottom enclosure or off of your work surface.

4. Move the unit so that the rear panel edge of the unit hangs over the edge of your work surface and install the remaining screws.

Note: If you are servicing a PC2, there are five remaining rear panel screws to install. If you are servicing a PC2X, there are seven remaining screws.

Closing the PC2/PC2X

Warning: The following procedure assumes that you have completed Steps 3 and 4 in Replacing the Top Enclosure. If you have not completed these steps, do so before continuing.

1. Refer to Figure 4-1 for the PC2 or Figure 4-2 for the PC2X. Tilt the unit up and install the eight enclosure support wall screws.

2. Slide one side of the unit off of your work surface and hold the appropriate endcap in position. Install the four endcap screws in the bottom enclosure. Repeat for the other endcap.

3. Refer to Figure 4-3. Install the four endcap screws in the rear panel.

4-6


Top Enclosure

Top EnclosureThe top enclosure includes five boards: Connector, Front Panel, LCD, Slider, and Engine. The Right and Left Enclosure Support Walls are also included on the top enclosure. Figure 4-5 shows the placement of the enclosure support walls. Figure 4-6 shows the placement of the boards.

Figure 4-5 Top enclosure, enclosure support walls

Figure 4-6 Top enclosure, board locations

Left Enclosure Support Wall

Right Enclosure Support Wall

LCD Board

Front Panel Board

Engine Board

Slider Board

Connector Board

4-7


Top Enclosure

Removing the Enclosure Support Walls

Left Enclosure Support Wall1. Remove the four screws that secure the left enclosure support wall to the top enclosure,

and remove the left enclosure support wall.

Right Enclosure Support Wall1. Remove the six screws that secure the right enclosure support wall to the top enclosure,

and remove the right enclosure support wall.

Replacing the Enclosure Support Walls

Left Enclosure Support Wall1. Align the center screw holes of the three-hole groupings in the left enclosure support wall

with the thread marks in the extrusion.

2. Install the four screws that secure the left enclosure support wall to the top enclosure.

Right Enclosure Support Wall1. Align the center screw holes of the three-hole groupings in the right enclosure support

wall with the thread marks in the extrusion.

2. Install the six screws that secure the right enclosure support wall to the top enclosure.

Removing the Connector Board1. Follow the procedure described on page 4-8 to remove the right enclosure support wall.


3. Disconnect the stranded wire cable from J301 on the Connector Board.


J301 PC2 Power stranded wire Engine Board

J302 Audio flat ribbon Engine Board

J303 MIDI/CPU flat ribbon Engine Board

J304 Front Panel flat ribbon Front Panel Board

J305 Slider flat ribbon Slider Board

J306 Treble flat ribbon Keyboard Assembly

J307 Bass flat ribbon Keyboard Assembly

J308 Wheels flat ribbon Mod Wheel Assembly

Table 4-2 Connector Board cables

4-8


Top Enclosure

4. Remove the cable locking clips and disconnect the flat ribbon cables from J304, J306, and J307. Be sure to set the cable locking clips safely aside so that you can install them when you reconnect the cables.

Note: The cables used throughout the PC2/PC2X are bundled and routed so that their locations and destinations seem obvious. However, to avoid reversing the Bass and Treble cables when reconnecting, mark one or both cables designating B for Bass and T for Treble.

5. The flat ribbon cables connected to J302, J303, J305, and J308 use wire trap connectors. The shielding has been removed from the end of these cables to expose the wires. The wires are directly inserted into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Connector Board.

6. Remove the five screws that secure the Connector Board to the rear panel. Two of these screws are longer than the others and have spacers located between the screw and the rear panel. See Figure 4-7 for the locations of the screws and spacers.

Note: Do not remove any other hardware from this portion of the rear panel.

Figure 4-7 Rear panel hardware locations

7. Remove the two screws that secure the MIDI jacks to the rear panel. See Figure 4-7.

8. Remove the Connector Board.

Thru / OutThru / Out In

Digital

ContrastLCDOut

SwitchOut1

Continuous

132

Breath

2 Right

Ribbon

Left Headphones


9.0V 2.0A14.0V~0.25A

longer screws with spacers

MIDI jack screws

*

* *

4-9


Top Enclosure

Replacing the Connector Board1. Hold the Connector Board and position it so that the power switch, LCD Contrast

potentiometer, and the rear panel jacks are correctly positioned through the rear panel portion of the top enclosure.

2. Install the two screws that secure the MIDI jacks to the rear panel. See Figure 4-7.

3. Install the five screws that secure the Connector Board to the rear panel. Be sure to place a spacer and use one of the longer screws at the locations noted in Figure 4-7.




Insert the five-wire flat ribbon cable from the Engine Board into the wire trap connector at J302 on the Connector Board.

Insert the seven-wire flat ribbon cable from the Slider Board into the wire trap connector at J305 on the Connector Board.

Insert the six-wire flat ribbon cable from the Mod Wheel Assembly into the wire trap connector at J308 on the Connector Board.

Insert the ten-wire flat ribbon cable from the Engine Board into the wire trap connector at J303 on the Connector Board.

5. Connect the flat ribbon cables from the Keyboard Assembly to J306 and J307. Be sure to install a cable locking clip on each connector.

6. Connect the flat ribbon cable from the Front Panel Board to J304 on the Connector Board. Be sure to install a cable locking clip on the connector.

7. Connect the stranded wire cable from the Engine Board to J301 on the Connector Board.

8. Follow the procedure on page 4-8 to install the right enclosure support wall.

Removing the Front Panel Board1. Follow the procedure described on page 4-8 to remove the right enclosure support wall.

2. Follow the procedure described on page 4-8 to remove the Connector Board.

3. Following Steps 4 and 5, disconnect the cables listed in Table 4-3.

4-10


Top Enclosure

4. The flat ribbon cables connected to J601 and J602 use wire trap connectors. The shielding has been removed from the end of these cables to expose the wires. The wires are directly inserted into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Front Panel Board.

5. Remove the cable locking clip and disconnect the flat ribbon cable at J604 on the Front Panel Board. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

Note: The flat ribbon cable at location J604 was disconnected following the procedure to remove the Connector Board. It is not necessary to disconnect it from the Front Panel Board. However, if you are replacing the Front Panel Board with a replacement board, be sure to disconnect the cable and connect it to the replacement board.

6. Five of the screws that secure the right enclosure support wall also secure the front panel edge of the Front Panel Board. You have already removed the enclosure support wall, but two screws remain securing this edge of the board. See Figure 4-8, and remove the two remaining screws.

Figure 4-8 Front Panel Board, screw locations

7. Remove the six screws that secure the three PC board clamps (two screws per clamp). These screws also secure the rear panel edge of the Front Panel Board.


J601 IBBB flat ribbon Button Board/Wheel Assembly

J602 FP Bridge flat ribbon Slider Board

Table 4-3 Front Panel Board cables

PC board clamps and screws

Front panel edge screws

J604

J601

J602

4-11


Top Enclosure

The LCD is mounted onto a bezel that is secured to the Front Panel Board with small pegs that snap into holes on the Front Panel Board. Removing the LCD requires cutting the tie wraps that bundle the LCD cables to cable mounts positioned along the rear panel. It is not necessary to remove the LCD from the unit. Remove the four screws that secure the LCD to the front panel bezel. Lift the LCD up from the bezel and fold it over so that the circuit side of the LCD is positioned above the Slider Board. For protection, place a piece of anti-static material between the LCD and Slider Boards.

8. Lift the Front Panel Board up from the top enclosure. The spinknob and switch button caps should remain in place.

Caution: Each switch button cap uses a set of small pegs to mount the cap to the Front Panel Board. The button caps are mounted individually or in clusters. If a cap becomes separated from the board, be careful that a peg is not inadvertently broken.

Replacing the Front Panel Board1. Position the Front Panel Board onto the top enclosure, then raise the top enclosure up

slightly to verify that the spinknob and switch button caps are correctly positioned through their openings in the top enclosure.

2. Align the center screw holes of the three-hole groupings on the front panel edge of the board with the thread marks in the extrusion and install the two screws that secure the front panel edge. See Figure 4-8.

3. Place a PC board clamp in position. Align the center screw holes of the clamp with the thread marks in the extrusion and install the two screws that secure the clamp. Repeat for the other two clamps.

4. Position the LCD onto the front panel bezel and install the four screws that secure it to the bezel.




Insert the five-wire flat ribbon cable from the Button Board into the wire trap connector at J601 on the Front Panel Board.

Insert the eight-wire flat ribbon cable from the Slider Board into the wire trap connector at J602 on the Front Panel Board.

6. If you have disconnected the flat ribbon cable from J604, reconnect it. Be sure to install the cable locking clip.

7. Follow the procedure on page 4-10 to install the Connector Board.


4-12


Top Enclosure

Removing the LCD Board1. Follow the procedure described on page 4-8 to remove the right enclosure support wall.

2. Disconnect the stranded wire from location J405 on the Engine Board.

3. Remove the cable locking clip and disconnect the flat ribbon cable from J406 on the Engine Board. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

4. Removing the LCD Board requires cutting the tie wraps that bundle the LCD cables to cable mounts positioned along the rear panel. Cut the tie wraps at the cable mounts that the two LCD cables pass through.

5. Remove the four screws that secure the LCD to the front panel bezel.

6. Lift the LCD Board up and remove it.

Caution: Be sure that the LCD cables are not tangled with other cables routed along the rear panel.

Replacing the LCD Board1. Place the LCD Board in position face down onto the front panel bezel.

2. Install the four screws that secure it to the front panel bezel.

3. Connect the stranded wire cable to J405 on the Engine Board.

4. Connect the flat ribbon cable to J406 on the Engine Board. Be sure to install the cable locking clip.

5. Position the LCD cables at the cable mounts on the rear panel and install new tie wraps through the cable mounts to bundle the cables.

Caution: Be sure that you have bundled the LCD cables with the other cables positioned at the cable mounts.


Removing the Polyphony Expansion Board (PCX-1)The Polyphony Expansion Board is mounted on to the Engine Board and held in place with four nylon PC board standoffs and a 24-pin female header on the underside of the board.

1. Follow the procedure described on page 4-8 to remove the left enclosure support wall.

2. Squeeze the top of one of the four nylon PC board standoffs, and lift the corner of the board until it clears that standoff. Repeat for the other three standoffs.

3. When the board is free of the standoffs, lift the board straight up to disconnect the 24-pin connector from the Engine Board.

4-13


Top Enclosure

Replacing the Polyphony Expansion Board (PCX-1)1. Place the PCX-1 Board over the four standoffs. This should properly position the 24-pin

connector over the 24-pin header on the Engine Board.

2. Press the PCX-1 Board down, securing the 24-pin connector, and snapping the board onto the standoffs.

Note: If you are installing a new PCX-1 Board, check the old board for Sound ROM options. If the unit has Sound ROM options, be sure to install them on the new board.

3. Follow the procedure described on page 4-8 to install the left enclosure support wall.

Removing the Slider Board1. Follow the procedure described on page 4-8 to remove the left enclosure support wall.

2. If the unit you are servicing has a PCX-1 Board installed, follow the procedure on page 4-13 to remove it.

3. The flat ribbon cables connected to J101 and J102 use wire trap connectors. The shielding has been removed from the end of these cables to expose the wires. The wires are inserted directly into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Slider Board.

4. Two of the screws that secure the left enclosure support wall also secure the front panel edge of the Slider Board. You have already removed the enclosure support wall, but one screw remains securing this edge of the board. See Figure 4-9, and remove the remaining screw.

Figure 4-9 Slider Board, screw locations

5. Remove the two screws that secure the PC board clamp and rear panel edge of the Slider Board to the top enclosure.

6. Remove the Slider Board. The slider knobs, slider bezels, and switch button caps should remain in place.

PC board clamp and screws

Front panel edge screw

J101

J102

4-14


Top Enclosure

Caution: Each switch button cap uses a set of small pegs to mount the cap to the Slider Board. The button caps are mounted individually or in clusters. If a cap becomes separated from the board, be careful that a peg is not inadvertently broken.

Replacing the Slider Board1. Position the Slider Board onto the top enclosure. Raise the top enclosure up slightly to

verify that the slider knobs and switch button caps are correctly positioned through their openings in the top enclosure.

2. Align the center screw hole on front panel edge with the thread marks in the extrusion and install the screw that secures the front panel edge of the Slider Board. See Figure 4-9.

3. Place the PC board clamp in position. Align the center screw holes of the PC board clamp with the thread marks in the extrusion and install the two screws that secure the PC board clamp.




Insert the seven-wire flat ribbon cable from the Connector Board into the wire trap connector at J101 on the Slider Board.

Insert the eight-wire flat ribbon cable from the Front Panel Board into the wire trap connector at J102 on the Slider Board.

5. If the unit you are servicing has a PCX-1 Board, follow the procedure on page 4-13 to install it.

6. Follow the procedure on page 4-8 to install the left enclosure support wall.

Removing the Engine Board1. Follow the procedure described on page 4-8 to remove the left enclosure support wall.

2. If the unit you are servicing has a PCX-1 Board installed, remove it following the procedure described on page 4-13.


4-15


Top Enclosure

4. The flat ribbon cables connected to J403 and J412 use wire trap connectors. The shielding has been removed from the end of these cables to expose the wires. The wires are inserted directly into these connectors.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Engine Board.

5. Disconnect the stranded wire cables from J402 and J405.

6. Remove the cable locking clip and disconnect the flat ribbon cable from J406. Be sure to set the cable locking clip safely aside so that you can install it when you reconnect the cable.

7. Two of the screws that secure the left enclosure support wall also secure the front panel edge of the Engine Board. You have already removed the enclosure support wall, but one screw remains securing this edge of the board. See Figure 4-10, and remove the remaining screw.

Figure 4-10 Engine Board, screw locations

8. Remove the two screws that secure the PC board clamp and rear panel edge of the Engine Board to the top enclosure.

9. Remove the Engine Board.


J402 PC2 PWR stranded wire Connector Board

J403 MIDI & CPU flat ribbon Connector Board

J405 Backlight stranded wire LCD Board

J406 LCD flat ribbon LCD Board

J412 PC2 Audio Out flat ribbon Connector Board

Table 4-4 Engine Board cables

PC board clamp and screws

Front panel edge screw

J412J406

J405 J402

J403

4-16


Top Enclosure

Replacing the Engine Board1. Place the Engine Board in position on the top enclosure.

2. Align the center screw hole on the front panel edge with the thread marks in the extrusion and install the screw that secures the front panel edge. See Figure 4-10.

3. Place the PC board clamp in position. Align the center screw holes of the PC board clamp with the thread marks in the extrusion and install the two screws that secure the PC board clamp.

4. Connect the flat ribbon cable from the LCD to J406 on the Engine Board. Be sure to install the cable locking clip.

5. Connect the stranded wire cable from the LCD to J405 on the Engine Board.

6. Connect the stranded wire cable from the Connector Board to J402 on the Engine Board.




Insert the ten-wire flat ribbon cable from the Connector Board into the wire trap connector at J403 on the Engine Board.

Insert the five-wire flat ribbon cable from the Connector Board into the wire trap connector at J412 on the Engine Board.

8. If the unit you are servicing has a PCX-1 Board, follow the procedure on page 4-13 to install it.

9. Follow the procedure on page 4-8 to install the left enclosure support wall.

Removing the Mod Wheel Assembly1. Refer to Figure 4-11 on page 4-19. Slide the left side of the unit forward off of your work

surface so that you can access the four screws and washers securing the assembly to the bottom enclosure. Remove the four screws and washers.

2. Slide the unit back onto your work surface.

3. Lift the Mod Wheel Assembly up, approximately two inches. Nylon reinforced tape secures the Aftertouch flex cable(s) to the bottom enclosure. Peel back the tape from one side and disconnect the cable(s).

Note: If you are servicing a PC2, one flat flex cable attaches to the Mod Wheel Assembly, location J202. If you are servicing a PC2X, two flat flex cables attach to the Mod Wheel Assembly, locations J202 and J203.

4-17


Top Enclosure

4. The flat ribbon cables connected to the two boards on the Mod Wheel Assembly use wire trap connectors. The shielding has been removed from the end of these cables to expose the wires. The wires are inserted directly into these connectors.

From the Mod Wheel Assembly, disconnect the flat ribbon cable from J201 on the Wheels Board. This cable connects to J308 on the Connector Board.

From the Mod Wheel Assembly, disconnect the flat ribbon cable from J701 on the IBBB Board. This cable connects to J601 on the Front Panel Board.

Lift up the sides of each connector. This unlocks the trap to free the cable wires. Gently pull each cable up out of the connector. Note the marking (red or black) on each cable that indicates the connection to Pin 1; you’ll need to reconnect the marked edge of the cable to Pin 1 when you replace the Mod Wheel Assembly.

5. Remove the Mod Wheel Assembly.

Replacing the Mod Wheel Assembly1. Hold the Mod Wheel Assembly in position over the bottom enclosure.




Insert the six-wire flat ribbon cable from the Connector Board into the wire trap connector at J201 on the Wheels Board.

Insert the five-wire flat ribbon cable from the Front Panel Board into the wire trap connector at J701 on the IBBB Board.

3. Connect the flat flex cable(s).

Note: If you are servicing a PC2, connect the flat flex cable to location J202 on the Mod Wheel Assembly. If you are servicing a PC2X, connect the two flat flex cables to locations J202 and J203 on the Mod Wheel Assembly.

4. Reapply the nylon reinforced tape to the flat flex cable(s).

5. Lower the Mod Wheel Assembly into position.

6. Slide the unit forward and install the four screws and washers to secure the Mod Wheel Assembly to the bottom enclosure.

4-18


PC2 Keyboard Assembly

PC2 Keyboard AssemblyThis section describes the removal and replacement of the PC2 (76-note) Keyboard Assembly. See page 4-26 for the corresponding procedures for the PC2X (88-note) Keyboard Assembly.

Removing the PC2 Keyboard AssemblyThe following procedure assumes that the PC2 is open and that you have followed the instructions on page 4-4 to remove the top enclosure.

The PC2 keyboard is mounted onto a wooden spacer and is secured to the wooden spacer with 16 screws. The Keyboard Assembly refers to the keyboard and the wooden spacer. The assembly is secured to the bottom enclosure with eight screws.

Note: The following steps describe the procedure to remove the keyboard from the PC2 and the wooden spacer to gain access to the keys, contacts, contact boards, and key weights. If you need to gain access to the keys only (i.e. key replacement), you can do so by following the procedure described on page 4-21, Disconnecting the PC2 Keyboard.

1. Refer to Figure 4-11. This illustration shows the locations of the keyboard and keyboard wooden spacer screws. Both sets of screws are accessible from the bottom enclosure.

Figure 4-11 PC2 76-note keyboard bottom

2. Tilt the PC2 up and remove the four keyboard rear screws, then lay the PC2 flat on your work surface.

3. Move the PC2 forward so that the front hangs over the edge of your work surface, giving you access to the remaining screws.

4. Remove the four keyboard front screws.

5. Remove the four Mod Wheel screws and washers. At this point the keyboard is loose in the bottom enclosure, but it has cables connected to the Mod Wheel Assembly, the Connector Board, and the Front Panel Board.

6. Slide the PC2 back onto your work surface.

Rear panel

Keyboard

Access panel

front

wooden spacer screws

rear

keyboard rear screws

keyboard front screws

4-19



7. Lift the Mod Wheel Assembly and disconnect the Aftertouch flex cable. This cable has nylon reinforced tape securing it to the bottom enclosure. Peel back the tape from one side to free the cable.

8. Place the Mod Wheel Assembly in its position on the bottom enclosure.

9. Remove the cable locking clips and disconnect the flat ribbon cables from locations J306 (Treble) and J307 (Bass) on the Connector Board. These cables are also secured to the bottom enclosure with nylon reinforced tape. Peel back the tape from one side to free the cables.

10. Remove the Keyboard Assembly.

11. The keyboard is mounted onto a wooden spacer. Sixteen screws secure the spacer to the keyboard.

12. Lay the Keyboard Assembly upside down on a flat protected surface and remove the 16 screws and remove the spacer. You can now access the components of the Keyboard Assembly.

Replacing the PC2 Keyboard Assembly

Note: If you have disconnected the Bass and Treble ends of the flat ribbon cables from the keyboard contact boards during service, be sure that you have reconnected them and reapplied the tape to secure the connectors.

1. Place the keyboard upside down on a flat protected surface and position the wooden spacer over the keyboard. Install the 16 screws that secure the wooden spacer to the keyboard.

2. Place the Keyboard Assembly on the bottom enclosure. Be sure that the flat ribbon cables from the keyboard are correctly positioned.

3. Connect the flat ribbon cables to the Connector Board and reapply the cable locking clips. Be sure to reapply the nylon reinforced tape that secures the flat ribbon cable to the bottom enclosure.

4. Lift the Mod Wheel Assembly and connect the Aftertouch flex cable. Be sure to reapply the nylon reinforced tape that secures the flex cable to the bottom enclosure. Place the Mod Wheel Assembly in its position on the bottom enclosure.

5. Move the PC2 forward so that the front hangs over the edge of your work surface, and install the four keyboard front screws.

6. Install the four Mod Wheel Assembly screws and washers.


8. Tilt the PC2 up and install the four keyboard rear screws.

4-20



Disconnecting the PC2 KeyboardFollow this procedure if you are merely replacing one or more keys.


2. Tilt the PC2 up and remove the four keyboard rear screws, then lay the PC2 flat on your work surface.

3. Move the PC2 forward so that the front hangs over the edge of your work surface, giving you access to the remaining screws.

4. Remove the four keyboard front screws.

Caution: The keyboard Aftertouch flex cable from the keyboard is connected to the Mod Wheel Assembly and is secured to the bottom enclosure with reinforced tape. When following the instructions below, be certain that you only slightly lift or move the Keyboard Assembly to avoid damage to the flex cable.

5. The 16 screws that secure the keyboard to the wooden spacer rest in holes provided for them on the bottom enclosure. To move the keyboard, lift the keyboard up slightly to free the 16 screws from their positions on the bottom enclosure.

6. Lift the keyboard up and move it approximately one inch to the right (as viewed standing at the keyboard).

7. You can now move the keyboard back approximately one inch toward the rear so that you can remove keys for replacement. See page 4-22 for the procedure to remove and replace keys.

Connecting the Keyboard1. Position the keyboard so that the 16 screws that secure the wooden spacer to the keyboard

are resting in the holes provided for them on the bottom enclosure.

Caution: Be certain that the Aftertouch flex cable is correctly positioned and that the nylon reinforced tape securing it to the bottom enclosure is still properly applied.


3. Move the PC2 forward so that the front hangs over the edge of your work surface, and install the four keyboard front screws.


5. Tilt the PC2 up and install the four keyboard rear screws.

4-21



Removing KeysThe following procedure assumes you have removed the top enclosure from the PC2.

1. Follow the procedure for removing the keyboard (page 4-19) or disconnecting the keyboard (page 4-21).

2. The following diagrams illustrate the outlines of the natural and sharp keys and the locations and functions of the components described in the following procedures.

Natural/White Key

Figure 4-12 Natural/White key, 76-note keyboard

Figure 4-13 Sharp/Black key, 76-note keyboard

Strikes the front and rear keycontact on key depression

Mounts through thekeyboard chassis

Key springlocation

Pivotlocation

Strikes the front and rear keycontact on key depression Mounts through the

keyboard chassis

Key springlocation

Pivotlocation

4-22



Natural/White Keys1. Each key has a spring located at the rear of the key. Using needle-nose pliers, slightly pull

up the top portion of the spring to release it from the key.

Caution: Be careful not to pull up too much, which could damage the spring.

2. Unlock the key from the pivot anchoring the key to the keyboard chassis. To do this, insert a small flat screwdriver at the back end of the pivot and press toward the front edge of the keyboard. While doing so, lift the back end of the key (where the spring was positioned).

Figure 4-14 Key spring location, 76-note keyboard

3. The key should now be free of the pivot. Remove the screwdriver.

4. Lift the key up slightly, then forward. You should be able to feel when the key is free of the pivot. A portion of the key hooks onto the keyboard chassis (see Figure 4-12). Lifting the back end of the key forward unhooks the key from the keyboard chassis.

Sharp/Black Keys1. To remove a sharp key, first remove the adjacent natural keys, as described in the previous

procedure.

2. Each key has a spring located at the rear of the key. Using needle-nose pliers, slightly pull up the top portion of the spring to release from the key.

Caution: Be careful not to pull up too much, which could damage the spring.



5. Lift the key up slightly, then forward. You should be able to feel when the key is free of the pivot. A portion of the key hooks onto the keyboard chassis (see Figure 4-13). Lifting the back end of the key forward unhooks the key from the keyboard chassis.

Keyboardchassis section

Spring

Pivot - After the spring is removed,insert a small flat screwdriver here to remove the key.

Use needle-nose pliers topull up the top portion of thespring.

4-23



Replacing a KeyThe following instructions apply to both natural and sharp keys.

Note: Always replace a sharp key before replacing the adjacent natural keys.

1. Place the key on the keyboard chassis and lower the key into position.

2. Align the pivot with the hole at the rear of the key. Push down on the key. It should snap into position on the pivot.

3. Install the spring.

Servicing the Keyboard Contact BoardsFollow the procedure on page 4-19 to remove the Keyboard Assembly.

1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on a soft surface to avoid scratching or other damage. The Treble and Bass Contact Boards are now visible.

Removing the Treble Contact Board1. Peel back the nylon tape securing the connector, and disconnect the flat ribbon cable from

the Treble Contact Board.

2. Remove the 24 screws that secure the Treble Contact Board to the keyboard chassis, and remove the Treble Contact Board.

Replacing the Treble Contact Board1. Position the Treble Contact Board on the keyboard chassis. Be sure that the rubber key

contacts line up properly through the holes in the keyboard chassis.

2. Install the 24 screws that secure the board to the keyboard chassis.

3. Connect the treble end of the flat ribbon cable and reapply the nylon tape to the connector.

Removing the Bass Contact Board1. Peel back the nylon tape securing the connector, and disconnect the flat ribbon cable from

the Bass Contact Board.

2. Remove the 18 screws that secure the board to the keyboard chassis, and remove the Bass Contact Board.

Replacing the Bass Contact Board1. Position the Bass Contact Board on the keyboard chassis. Be sure that the rubber key



3. Connect the bass end of the flat ribbon cable and reapply the nylon tape to the connector.

4-24



Removing the Keyboard Contact Strips1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on

a soft surface to avoid scratching or other damage.

2. Follow the procedure for removing the Bass and Treble Keyboard Contact Boards on page 4-24.

3. Examine the keyboard contact strips and look at the design of an individual contact. The top portion of the contact has two indentations. One indentation is deeper than the other. When replacing the keyboard contact strips, the deeper indentation is always positioned toward the rear of the key.

4. The keyboard contact strips have mounting pegs that secure the contact strips to the keyboard contact boards.

5. To remove a keyboard contact strip, gently lift and free the strip from its position. Be careful not to rip or damage any contact in the process.

Figure 4-15 Side view of the natural/white key, 76-note keyboard

Replacing the Keyboard Contact Strips1. Position the contact strip on the keyboard contact board.

Note: Be sure that the deeper indentation is positioned toward the rear of the key.

2. Line up the contact strip mounting pegs with their respective mounting holes on the keyboard contact board.

3. Using a small blunt-end tool (Q-Tip, toothpick, etc.), gently push the mounting pegs through the holes. Do not use too much force or use a tool that can poke a hole through the mounting pegs. However, be sure that the mounting pegs are installed through the holes.

Key contacts (side view)

Deeper contact to back

Mounting pegs

PC board

Key contacts(top view)


Key springlocation

Pivotlocation

Front of key

4-25


PC2X Keyboard Assembly


Removing the PC2X Keyboard AssemblyThe following procedure assumes that the PC2X is open and that you have followed the instructions to remove the top enclosure.

1. The keyboard is secured to the bottom enclosure using ten screws. Refer to Figure 4-16 for the position of the screws. Arrows identify the locations of the ten screws.

2. Tilt the PC2X up and remove the five keyboard rear screws, then lay the PC2X flat on your work surface.

3. Move the PC2X forward so that the front hangs over the edge of your work surface to access the remaining screws, and remove the five keyboard front screws.

4. Remove the four Mod Wheel screws and washers. At this point the keyboard is loose in the bottom enclosure, but it has cables connected to the Mod Wheel Assembly and the Connector Board.

Figure 4-16 PC2X 88-note keyboard bottom

5. Slide the PC2X back onto your work surface.

6. Lift the Mod Wheel Assembly and disconnect the Aftertouch flex cables. These cables have nylon reinforced tape securing them to the bottom enclosure. Peel back the tape from one side to free the cables.

7. Place the Mod Wheel Assembly in its position on the bottom enclosure.

8. Remove the cable locking clips and disconnect the flat ribbon cables from locations J306 and J307 on the Connector Board. These cables are also secured to the bottom enclosure with nylon reinforced tape. Peel back the tape from one side to free the cables.

Note: If you are merely replacing one or more keys, it is not necessary to entirely remove the Keyboard Assembly from the PC2X. Follow the procedure on page 4-27.

9. Remove the Keyboard Assembly.

Mod Wheel screws

Keyboard rear screws

Keyboard front screwsKeyboard

Rear panel

Access panel

4-26



Replacing the PC2X Keyboard Assembly1. Place the keyboard on the bottom enclosure. Be sure that the flat ribbon cables from the

keyboard are correctly positioned to connect them to the Connector Board.

Note: If you have disconnected the Bass and Treble ends of the flat ribbon cables from the keyboard contact boards during service, be sure that you have reconnected them and secured them with tape. Be sure that the small ribbon cable connecting the Bass and Treble Contact Boards is connected.

2. Connect the flat ribbon cables to J306 and J307 on the Connector Board and reapply the cable locking clips.

3. Secure the flat ribbon cables to the bottom enclosure. Be sure to reapply the nylon reinforced tape that secures the cables to the bottom enclosure.

4. Lift the Mod Wheel Assembly and connect the Aftertouch flex cables. Be sure to reapply the nylon reinforced tape that secures the flex cables to the bottom enclosure.

5. Slide the PC2X forward so that you can install the five keyboard front screws.

6. Install the four Mod Wheel Assembly screws and washers.

7. Slide the PC2X back on to your work surface.

8. Tilt the PC2X up and install the five keyboard rear screws.

Removing KeysThe following procedure assumes you have removed the top enclosure from the PC2X.

1. Follow the procedure for removing the keyboard.

Note: If you are merely replacing one or more keys, it is not necessary to entirely remove the keyboard from the PC2X. Once the keyboard is loose, you can slide it toward the rear panel to give you enough access to remove keys.

2. The following diagrams illustrate the outlines of the natural and sharp keys and the location and functions of the components described in the following procedures.

4-27



Natural/White Key

Figure 4-17 Natural/white key, 88-note keyboard

Figure 4-18 Sharp/black key, 88-note keyboard

Natural/White Keys1. Remove the silver key spring located at the rear of the key. You will notice that the bottom

of the spring is secured to the keyboard chassis by a hook.

You can remove the spring by inserting a dowel (3mm diameter) into the spring, and pushing down on it slightly. Then pull the top of the dowel toward the front of the keyboard. This will unhook the spring from the keyboard chassis.



Key springlocation

Pivotlocation

Hooks under the frontof the keyboard chassis



Key springlocation

Pivotlocation

Hooks under the frontof the keyboard chassis

4-28



Figure 4-19 Key spring



4. Lift the key up slightly, then forward. You should be able to feel when the key is free of the pivot. The front edge of each key hooks under the keyboard chassis. Be sure the key is not hooked under the keyboard chassis prior to lifting the key off.

Sharp/Black Keys1. To remove a sharp key, first remove the adjacent natural keys, as described in the previous

procedure.

2. Remove the gold key spring located at the rear of the sharp key. You will notice that the bottom of the spring is secured to the keyboard chassis by a hook.

Refer to Figure 4-19. You can remove the spring by inserting a dowel (3mm diameter) into the spring, and pushing down on it slightly. Then pull the top of the dowel toward the front of the keyboard. This will unhook the spring from the keyboard chassis.

3. Unlock the key from the pivot anchoring the key to the keyboard chassis. To do this, insert a small flat screwdriver at the bottom of the pivot and press toward the front edge of the keyboard. While doing so, lift the back end of the key (where the spring was positioned).


5. Lift the key up slightly, then forward. You should be able to feel when the key is free of the pivot. The front edge of each key hooks under the keyboard chassis. Be sure the key is not hooked under the keyboard chassis prior to lifting the key completely off.

Pivot

Hook

Insert the screwdriver here

Keyboardchassis section

Insert a 3mm dia. dowel into the spring and push down slightly.

Then move the top of the doweltoward the front of the keyboardto remove the spring from the hook.

4-29



Replacing a Key1. The following instructions apply to both natural and sharp keys.

Note: Always replace a sharp key before replacing the adjacent natural keys.

2. Hook the front end of the key under the keyboard chassis.

3. Check that the mounting peg is correctly positioned.

4. Lower the key into position. Align the pivot with the hole at the rear of the key.

5. Push down on the key. It should snap into position onto the pivot.

6. Install the spring.

Servicing the Keyboard Contact Boards1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on

a soft surface to avoid scratching or other damage. The Treble and Bass Contact Boards are now visible.

Removing the Treble Contact Board1. Disconnect the flat ribbon cable that connects the Treble Contact Board to the Connector

Board. The connector is secured with tape. Peel back the tape to free the cable.

2. Disconnect the small ribbon cable that connects the Treble and Bass Contact Boards.

3. Remove the 26 screws that secure the Treble Contact Board to the keyboard chassis, and remove the Treble Contact Board.

Replacing the Treble Contact Board1. Position the Treble Contact Board on the keyboard chassis. Be sure that the rubber key



3. Connect the small ribbon cable that connects the Treble to the Bass Contact Board.

4. Connect the flat ribbon cable that connects the Treble Contact Board to the Connector Board. Be sure to reapply the tape to secure the connector.

Removing the Bass Contact Board1. Disconnect the flat ribbon cable that connects the Bass Contact Board to the Connector

Board. The connector is secured with tape. Peel back the tape to free the cable.

2. Disconnect the small ribbon cable that connects the Bass and Treble Contact Boards.

3. Remove the 22 screws that secure the board to the keyboard chassis, and remove the Bass Contact Board.

4-30



Replacing the Bass Contact Board1. Position the Bass Contact Board on the keyboard chassis. Be sure that the rubber key



3. Connect the small ribbon cable that connects the Bass to the Treble Contact Board.

4. Connect the flat ribbon cable that connects the Bass Contact Board to the Connector Board. Be sure to reapply the tape to secure the connector.

Removing the Keyboard Contact Strips1. Place the keyboard upside down on a flat soft surface. Be sure that the keys are resting on

a soft surface to avoid scratching or other damage.

2. Follow the procedure to remove the Bass and Treble Keyboard Contact Boards.

3. Examine the keyboard contact strips and look at the design of an individual contact. The top portion of the contact has two indentations. One indentation is deeper than the other. When replacing the keyboard contact strips, the deeper indentation is always positioned toward the rear of the key.

4. The keyboard contact strips have mounting pegs that secure the contact strips to the keyboard contact boards.

5. To remove a keyboard contact strip, gently lift and free the strip from its position. Be careful not to rip or damage any contact in the process.

Figure 4-20 Side view of the natural/white key, 88-note keyboard

Key contacts (side view)

Deeper contact to back

Mounting pegs

PC board

Key contacts(top view)

Strikes the front and rear keycontact on key depressionKey spring

location

Pivotlocation

Front of key

4-31



Replacing the Keyboard Contact Strips1. Position the contact strip on the Keyboard Contact Board that you are servicing.

Note: Be sure that the deeper indentation is positioned toward the rear of the key.

2. Line up the contact strip mounting pegs with their respective mounting holes on the keyboard contact board.

3. Using a small blunt-end tool (Q-Tip, toothpick, etc.), gently push the mounting pegs through the holes. Do not use too much force or use a tool that can poke a hole through the mounting pegs. However, be sure that the mounting pegs are installed through the holes.

Removing a Key Weight1. The main components of the weighted-key action consist of the following: the 88 keys,

two rods, 88 key weights, and support brackets for the key weights and rods. There are seven 12-position brackets and one 4-position bracket.

Note: Key weights are attached to one of the two rods that span the length of the keyboard. The first rod is referred to as the bass rod and the second rod is referred to as the treble rod. The first rod (the bass rod) begins at low A and extends to G# above Middle C. The second rod (the treble rod) begins at A above Middle C and extends to High C.

2. To replace a key weight, identify the section with the broken key weight and remove all the keys from that section. The key weights, rods, and support brackets are now visible.

3. There is a locking clip at each end of the keyboard. To remove the locking clips, use a standard screwdriver to pry the locking clips off.

4. Pry the rod up from the support bracket. The key weights remain attached to the rod.

5. To remove the key weights from the rod, move the key weight side to side and pull it away from the rod. The key weight should easily pop off the rod.

Note: The natural and sharp key weights are physically different. The sharp key weights are smaller. When you remove multiple key weights, do so in a way that you will be able to place the new natural and sharp key weights in their correct positions.

Figure 4-21 Natural/White and Sharp/Black key weights

6. Remove the broken key weight(s) and inspect the other key weights for reliability.

Sharpkey weight

Natural/Whitekey weight

4-32



Replacing a Key Weight1. Each key weight has a strip of red felt attached with pliable adhesive. Be sure the red felt

extends onto the upper surface of the top of the key weight.

2. Place the key weight in position against the rod and snap it onto the rod with slight pressure.

Note: Be sure to place the sharp key weights in the correct positions.

3. Place the rod and key weights into position over the support brackets and snap the rod into the support brackets. Be certain that the rod is pressed securely into the support brackets.

4. Prior to replacing the keys, check that each key weight moves freely. To do this, position a screwdriver at the back end of the key weight (on the red felt), press down and remove the screwdriver. The key weight should move up and down freely.

5. Install the keys and key springs.

4-33



4-34

Chapter 5Troubleshooting

Introduction

Cables, Connectors

Flat Ribbon CablesAll flat ribbon cables with connectors are keyed, and therefore cannot be reversed. Most flat ribbon cables have locking cable clips. Be sure to reapply the clips when connecting cables. Flat ribbon cables that connect to picoflex connectors do not have locking cable clips.



Surface-Mount DevicesThe removal and replacement of surface-mount devices requires training and the proper equipment. If you do not have the training or equipment to remove or replace surface-mount devices, contact the service department to order a board replacement. International service technicians should contact their appropriate Young Chang Distributor.

Saving User Data1. Set up a MIDI recording device.

2. Connect the a MIDI cable to the MIDI Out port of the PC2 to the MIDI In port on the external device.

3. Press the Global button on the PC2. Press the Right cursor button until the LCD displays Dump all Objects?

4. Begin recording on the MIDI recording device.

5. Press Enter on the PC2. The LCD shows the objects being saved. When all objects are saved, Dump all Objects? will appear in the LCD.

6. To reload the saved objects, connect a MIDI cable from the MIDI Out port of the recording device to the PC2’s MIDI In port.

7. From the external device, begin the playback of the file.

Troubleshooting

Boot Block

Boot BlockUse the PC2’s Boot Loader to enter Diagnostics or perform a Hard Reset to the unit. You can also install operating system updates and ROM objects into Flash ROM.

Entering the Boot BlockApply power to the unit. When the Please wait... message appears in the LCD, quickly press and release the Panic button for PC2 keyboard units or Edit button for PC2R rack units.

The LCD displays the main menu of the Boot Loader and the first available option. Use the Left or Right cursor button to advance to the next option. The menu options are as follows:

Install Engine—Installs new operating system software upgrades.

Install ROM option—Loads Sound ROM presets after installing a Sound ROM option.

Update boot block—Installs boot block updates.

Run diagnostics—Enters the diagnostic test menu. For a complete list of tests and the procedure to execute the diagnostic tests, refer to Chapter 2, Diagnostics.

Run engine—Exits the boot block and returns the unit to normal operation.

Hard RESET—Clears the memory to factory default settings.

Resets

Hard ResetThere are two ways to perform a Hard Reset to the PC2.

1. Press the Global button and press the Right cursor button to step through the Global parameters to Reset PC2? and press the Enter/Yes button. The LCD displays an Are you sure? message. Press the Enter/Yes button to continue or the Cancel/No.

2. Enter the Boot Loader and press either the Left or Right cursor button to scroll through the menu. Press Enter to select Hard Reset. The LCD displays an Erase RAM objects? message. Press the Right button to execute the hard reset. Press the Left button to cancel.

Soft ResetThe Soft Reset does not erase user programs and setups and is equivalent to turning the power off and on. To Soft Reset a PC2R, simultaneously press the FX, MIDI Receive and Global buttons. To Soft Reset a PC2, simultaneously press the +/-, 0 and Clear buttons.

5-2

Troubleshooting

Software Updates

Software UpdatesA computer with a MIDI interface and sequencer is necessary to transfer software to your PC2 units MIDI Sysex.

File FormatsSoftware upgrades are stored as standard MIDI files. Filenames are in the format PC2XVV.MID, where X is the software block and VVV is the version number (V.VV). The following lists the possible values for X. Never install files with names that don’t conform to this format; it won’t work.

bk—boot block for keyboard models

br—boot block for rack models

bp—boot block for Polyphone Expansion (PCX-1) option (keyboard and rack units)

k—operating system software for keyboard models

r—operating system software for rack models

p—operating system for Polyphony Expansion (PCX-1) option (keyboard and rack models)

s—soundware data for keyboard and rack models

sp—soundware data for Polyphony Expansion (PCX-1) option (keyboard and rack models)

Installing the Operating System or Setups

Warning: This procedure requires performing a hard reset. All user programs and setups will be erased. Before continuing, be sure to save all user programs and setups.

1. Connect a MIDI cable from the MIDI Out port of the computer interface or sequencer to the MIDI In port on the PC2.

2. Open the first .MID file using the sequencer program.

3. Turn on the PC2 and follow the procedure to enter the Boot Block.

4. Press the Enter button to select Install engine.

5. Press the Enter button to select via MIDI.

6. The LCD shows Waiting for MIDI. Start playing the MIDI file from the sequencer. While a file is loading, the bottom line of the display shows the progress. If the display continues to show Waiting for MIDI after starting the sequencer, stop and restart the sequence.

7. After the file is loaded, the display will show done.

8. If you have additional files to load, open the file from the sequencer and begin playing it.

9. Press the Cancel button twice to return to the main menu. Scroll to Hard Reset and select Yes.

5-3

Troubleshooting

Software Updates

Installing a New Boot Block

Warning: This procedure performs a hard reset. All user programs and setups will be erased. Before continuing, be sure to save all user programs and setups.

1. Connect a MIDI cable from the MIDI Out port of the computer interface or sequencer to the MIDI In port on the PC2.

2. Using the sequencer program, open the first .MID file.


4. Press the Enter button to select Update boot block.

5. Press the Enter button to select via MIDI.

6. The LCD shows Waiting for MIDI. Start playing the MIDI file from the sequencer. While a file is loading, the bottom line of the display shows the progress. If the display continues to show Waiting for MIDI after starting the sequencer, stop and restart the sequence.

7. After the file is loaded, the unit will reset.

Installing Sound ROM OptionsAfter installing a Sound ROM option, the presets need to be transferred into Flash ROM.

Warning: This procedure requires performing a hard reset. All user programs and setups will be erased. Before continuing, be sure to save all user programs and setups.


2. Use the Left or Right cursor button to scroll to Install ROM option, and press the Enter button.

3. Use the Left or Right cursor button to select the appropriate option for the card you are installing, card 1 or card 2.

4. Press the Enter button. The LCD indicates Installing as the presets transfer into Flash ROM.

Note: If you are installing a second ROM option repeat Steps 3 and 4.

5. Use the Left or Right cursor button to scroll to Hard Reset, and press the Enter button.

6. Select Yes to hard reset the unit. The unit now has the additional ROM option setups installed.

5-4

Troubleshooting

Replacing the Battery

Replacing the BatteryThe PC2 uses a flat three volt Lithium coincell battery. When the battery voltage runs low, the unit boots up with a low battery message.

Note: The battery voltage can be checked at anytime using the Scanner Diagnostics. See page 5-7 for more information.

PC2 Keyboard Models

Accessing the Battery1. Place the PC2 upside down on a flat protected surface.

2. Remove the seven screws that secure the access panel and set it safely aside.

3. If the unit has Sound ROM options installed, remove them.

Removing the BatteryThe battery (CR2032) in the PC2 keyboard is mounted into a holder on the Engine Board and is accessible when the access panel is removed.

1. Insert a flat plastic tool (plastic knife, pen cap, etc.) into one of the openings between the battery and the holder to lift the battery.

Figure 5-1 Battery and holder

2. Ease the battery out of the holder. If necessary, insert the plastic tool at the bottom of the holder (closest to the Engine Board) to remove the battery.

Installing the Battery1. Position the battery over the holder so that the positive terminal is pointing to the Engine

Board.

2. Slide the battery into the holder and apply slight pressure until it snaps into place.

3. If the unit has Sound ROM options, install them.

4. Install the seven screws to secure the access panel.

Insert the tool hereto lift the battery.

Insert the tool betweenthe holder and the battery to ease the battery outof the holder.

CR2032

5-5

Troubleshooting

Replacing the Battery

PC2R Rack Models

Accessing the Battery1. Remove the seven screws that secure the top cover.

2. Slide the top cover back from the Front Panel Assembly to release the top cover from the bottom enclosure, and place the top cover safely aside to avoid damage.

3. If the unit has Sound ROM options installed, remove them.

Removing the BatteryThe battery (CR2032) in the PC2 keyboard is mounted into a holder on the Engine Board and is accessible when the access panel is removed.

1. Refer to Figure 5-1. Insert a flat plastic tool (plastic knife, pen cap, etc.) into one of the openings between the battery and the holder to lift the battery.

2. Ease the battery out of the holder. If necessary, insert the plastic tool at the bottom of the holder (closest to the Engine Board) to remove the battery.

Installing the Battery1. Position the battery over the holder so that the positive terminal is pointing to the Engine

Board.

2. Slide the battery into the holder and apply slight pressure until it snaps into place.

3. If the unit has Sound ROM options, install them.

4. Place the top cover in position and slide it toward the Front Panel Assembly.

5. Install the seven screws that secure the top cover.

5-6

Troubleshooting

Scanner Tests

Scanner Tests

PC2R Rack ModelsThe Scanner Tests for the PC2R rack model include separate tests for the front panel buttons and LEDs, rotary potentiometers including Knobs A–D and Volume, and the Alpha Wheel.

To enter the Scanner Tests, first turn on the PC2R. Once the PC2R is on and ready to play, simultaneously hold down the three buttons located in the top row of the Modes section (Internal Voices, KB3 and MIDI Setups). All front panel LEDs will light in a sequence and the LCD will display the following:

Figure 5-2 LCD example, PC2R scanner tests

The first line of the display shows the scanner software version, the battery voltage and the current value for the Mod Wheel position. Disregard the Mod Wheel value; it is applicable only to keyboard units. The second line shows the results of the current test. Figure 5-2 shows the result of the volume potentiometer test.

To exit the Scanner Tests and return to normal operation, simultaneously press the Cancel and Enter buttons.

Front Panel ButtonsTo test a button, press any front panel button.

An example of the expected test result for the Solo button follows: BUTTON Solo

Alpha WheelTo test the Alpha Wheel, turn it to increase or decrease the value by one. The expected test result when the Alpha Wheel is turned is one of four values–0, 1, 2, or 3:

SPINKNOB = 3

Front Panel KnobsTo test Knobs A–D or the Volume potentiometer, turn a knob to check its value at the bottom (zero, far left) and at the top (far right).

An example of the normal test results for the Knob A follows (your results may vary slightly):

At zero (far left): SLIDER 1 = 0

At top (far right): SLIDER 1 = 255

SCAN1.3 B=3.0 W=128

VOL SLIDER = 255

5-7

Troubleshooting

Scanner Tests

PC2 Keyboard ModelsThe Scanner Tests for the PC2 keyboard models include separate tests for the front panel buttons and LEDs, front panel sliders including the Master Volume slider, the Alpha Wheel, the Mod and Pitch wheels, the keyboard, and the pedals.

To enter the Scanner Tests, first turn on the PC2. Once the PC2 is on and ready to play, simultaneously hold down the 4, 5 and 6 buttons. All front panel LEDs will flash and the LCD will display the following:

Figure 5-3 LCD example, PC2 scanner tests

The first line of the display shows the scanner software version, as well as the battery voltage and the current value for the Mod Wheel position. The second line shows the results of the current test. Figure 5-3 shows the result of a key test—in this case striking the key C4 on the keyboard.

To exit the Scanner Tests and return to normal operation, simultaneously press the Cancel and Enter buttons.

Front Panel ButtonsTo test a button, press any front panel button. An example of the expected test result for the Solo button follows:

BUTTON Solo

Alpha WheelTo test the Alpha Wheel, turn it to increase or decrease the value by one. The expected test result when the Alpha Wheel is turned is one of four values–0, 1, 2, or 3:

SPINKNOB = 3

Front Panel SlidersTo test the front panel sliders, move a slider to check its value at the bottom, center, and top. An example of the normal test results for the Slider A follows (your results may vary slightly):

At bottom: SLIDER 1 = 0

At center: SLIDER 1 = 128

At top: SLIDER 1 = 255

SCAN1.3 B=2.9 W=128

KEY C4 60 C4 60

5-8

Troubleshooting

Scanner Tests

WheelsTo test the pitch and mod wheels, move the wheel up and down. An example of the expected test results for the pitch wheel follows (your results may vary slightly):

At bottom: PITCH WHEEL = 0

At center: PITCH WHEEL = 128

At top: PITCH WHEEL = 255

KeyboardTo test the keyboard, press any key. The key name and number will be displayed twice in the LCD. The first set of name and number is the test result for the front key contact switch and the second is for the rear switch. An example of the expected test result for the Middle C key follows:

KEY C4 60 C4 60

Pressing harder the display will change and show the pressure value.

PRESSURE = 255

Switch Pedals 1, 2, and 3To test a switch pedal, press the pedal. An example of the expected test result for the switch pedal 1 follows:

Full depression: PEDAL 1

Continuous Pedals 1 and 2To test the continuous control pedal, press the pedal. An example of the expected test result for the continuous control pedal follows:

No depression: CTRL PEDAL = 255

Full depression: CTRL PEDAL = 0

5-9

Troubleshooting

Power Problems

Power Problems

Dead1. Before opening the unit, verify the following:

• The AC outlet is supplying power.

• The AC adapter is properly connected to the unit.

2. Check the power switch, power jack and AC adapter.

3. Refer to the Interconnect Diagram. See page 5-13 for rack models or page 5-14 for keyboard models. Check all related connections.

4. Refer to the Connector Board schematics and check all supply voltages.

Audio Problems

No Audio

Note: If you are diagnosing a PC2R rack unit, you can check for audio without having a controller connected. Connect a pair of headphones, turn the power on. When the unit is on and ready to play, simultaneously press the MIDI Receive and Global buttons to play one of the stored demos. Flashing LEDs in the Performance section indicate the locations of the stored demos. Select one to play to check the audio. Press the Cancel button to exit.

1. Run the Scanner Diagnostics to check the volume slider operation.

2. Refer to the Interconnect Diagram. See page 5-13 for rack models or page 5-14 for keyboard models.

3. Check the flat ribbon cable from J412 on the Engine Board to J302 on the Connector Board.

4. Check the solder connections at the connectors.

5. Refer to the Engine Board schematics and check the signal activity on the DAC, U23.

6. Trace the signal path.

5-10

Troubleshooting

Front Panel Problems

Front Panel Problems

LCD not lit1. Check the LCD contrast potentiometer. Turn the pot to see if there is any change.

Note: If you are servicing a PC2R rack unit, the LCD Contrast is located on the front panel. If you are servicing a PC2 keyboard, it is located on the rear panel.

2. Check the stranded wire cable from the LCD Board to J405 on the Engine Board. Disconnect and reseat the cable.

3. Check the flat ribbon cable from the LCD Board to J406 on the Engine Board. Disconnect and reseat the cable.

4. Check the solder connections on the LCD and Engine Boards.

5. Refer to the Engine Board schematics and check the signal path.

Buttons, Sliders or Controllers not working1. Run the Scanner Tests.

Note: If you are servicing a PC2R rack unit, simultaneously press the Internal Voices, KB3 and MIDI Setups buttons located in the top row of the Modes section. If you are servicing a PC2 keyboard, simultaneously press the 4, 5 and 6 buttons.

2. Refer to the Interconnect Diagram. See page 5-13 for rack models or page 5-14 for keyboard models.

3. Check all related cables.

4. Disconnect and reseat the cables.

5. Check the solder connections at the connectors.

6. Check front panel ribbon cable(s).

7. Refer to the Connector Board schematics and check U1, IC Scanner 37451, for signal activity.

5-11

Troubleshooting

Keyboard Problems

Keyboard Problems

Dead Keyboard1. Check the flat ribbon cables connecting the keyboard Bass and Treble Contact Boards to

the Connector Board, locations J306 and J307. Be certain that the cables are not loose or damaged.

2. Disconnect and reseat the cables.

3. Refer to the Connector Board schematics.

4. Check U1, IC Scanner 37451 on the Connector Board for keyboard signals.

5. Trace signal path.

6. Find and replace bad component(s) or order a board replacement.

Dead Note(s)

One or More in a Section1. Remove related contact board.

2. Check contact strip for dirt, damage or wearing. Clean dirty contacts with denatured alcohol. Replace damaged or worn contact strip.

3. Install contact strip.

4. If section is still dead, remove strip and check contact board for shorts, cold solder joints, etc.

5. Find and replace bad component(s) or order replacement board.

Mechanical Noise1. Check keyboard for broken key weights, support brackets, or ripped contacts.

5-12

Troubleshooting

PC2R Interconnect Diagram

PC2R Interconnect Diagram

J403MIDI & CPU

J402PC2 PWR

J412Audio OutJ405

Backlight

J406LCD

J322Vol/Pwr/Hp

J301PC2 Power

J303MIDI & CPU

J304Front Panel

J302Power In

LCD

Connector Board

EngineBoard

Hp/Vol/Pwr SwBoard

J601Front Panel

J602FP Bridge

J603FP Bridge

J604FP Bridge 2

Left FrontPanel Board

Right FrontPanel Board

J3FP Bridge 2

J2Vol/Pwr/Hp

J410, Expansion Sound ROM 1


128

Chn

l Opt

J404, EPROM Board

J408

5-13

Troubleshooting

PC2 Interconnect Diagram

PC2 Interconnect Diagram

J301PC2 Power

J303MIDI & CPU

J304Front Panel

J305Slider

ConnectorBoard

J306Treble

J307Bass

J308Wheels

J302Audio

J602FP Bridge

J601IBBB

J604Front Panel

Wheels

J202J205 Mod

J204 Pitch

J201

J203

Wheels Board

88-note keyboards only

Button Board

J101Slider

J102FP Bridge

LCD

J403MIDI & CPU

J402PC2 PWR J412

Audio OutJ405

Backlight

J406LCDEngine

Board



128

Chn

l Opt

J404, EPROM Board

J408

SliderBoard

Front PanelBoard

J701

5-14

Chapter 6Parts Lists

IntroductionThe parts lists included in this chapter cover all models of the PC2 series. Some printed circuit boards and assemblies are used in more than one model. Therefore, the parts lists on the following pages are listed under these headings:

The following two tables list the printed circuit boards and assemblies by model.

Note: The PC2 and PC2X have been combined as these two models share most printed circuit boards and assemblies in common. The exceptions are the parts lists for the Final and Keyboard Assemblies.

PC2/PC2X Printed Circuit Boards and Assemblies

PC2R/PC2/PC2X All Models

PC2/PC2X Keyboard Models

PC2R Rack Model

Part No. Description Page

N012000150 Final Assembly, PC2 page 6-9

N012000151 Final Assembly, PC2X page 6-11

N012103800 LCD Board page 6-8

N012300051 Engine Board page 6-3

N012300053 Pitch & Mod Wheel Assembly page 6-8

N012300061 Connector Board page 6-6

N012400051 Slider Board page 6-9

N012400052 Front Panel Board page 6-5

N215040311 Keyboard TP-8R AFT 76 Note page 6-10

N215040413 Keyboard TP-10MDF AFT 88 Note page 6-12

Parts Lists

Introduction

PC2R Printed Circuit Boards and Assemblies

Part No. Description Page

N012000153 Final Assembly page 6-16

N012103802 LCD Board page 6-15

N012300040 Connector Board page 6-13

N012300051 Engine Board page 6-3

N012300070 Front Panel Assembly page 6-14

N012300080 Left Front Panel Board page 6-14

N012300090 Right Front Panel Board page 6-15

N012700019 Headphone/Volume/Power Switch Board page 6-15

6-2

Parts Lists

PC2R/PC2/PC2X

PC2R/PC2/PC2X

Engine Board, N012300051

Part No. Description Qty. Reference Designation

N035040201 BATTERY HOLDER TOSHIBA (BV-32) PC-88 1 J411

N041010401 SHUNTS JUMPER 2mm DIGI-KEY SPE1302-ND 1 @JP1

N041021264 SOCKET SIMM 22.5D TIN 64P LEFT METAL 2 J409, 410

N041025308 HEADER .156” SP 8P (09-65-2088) 1 J402

N041030040 HEADER 2mm SQR 3P R/A SAMTEC 1 JP1

N041030124 HEADER DUAL 2.0mm 24P MOLEX 87089-2416 1 J408

N041030150 HEADER DUAL 0.1" SQR 50POS DIGIKEY 1 J404

N041031210 CONN .1" SP DUAL ROW 14P (057-014-153) 1 J406

N041032305 CONN WIRE TRAP 2.00mmSP 5P (52147-0510) 1 J412


N041034002 HEADER .098" SP 2P (22-03-5025) 1 J405

N042005422 JUMPER WIRE 2.5MM 1 JP2 PINS 1 & 2

N051102103 RELAY 5V DPDT (G6H-2-DC5) 2 RY1-2

N064003502 IC LINEAR +5V LM78M05 500mA TO-220 1 VR1

N051064004 RES TF 47Ω 5% 1/16W 0603 T&R 4 R1, 26, 27, 39

N051064010 RES TF 100Ω 5% 1/16W 0603 T&R 1 R38

N051064011 RES TF 110Ω 5% 1/16W 0603 T&R 1 R28

N051064015 RES TF 1.5KΩ 5% 1/16W 0603 2 R64, 65

N051064025 RES TF 330Ω 5% 1/16W 0603 1 R32

N051064100 RES TF 1KΩ 5% 1/16W 0603 T&R 4 R5, 8, 34, 68

N051064109 RES TF 1MΩ 5% 1/16W 0603 T&R 2 R15, 16

N051064110 RES TF 10KΩ 5% 1/16W 0603 T&R 10 R7, 14, 17-18, 23-25, 29, 36-37

N051064130 RES TF 1.3KΩ 5% 1/16W 0603 T&R 1 R4

N051064220 RES TF 2.2KΩ 5% 1/16W 0603 T& 2 R6, 9

N051064470 RES TF 4.7KΩ 5% 1/16W 0603 T&R 3 R2, 10, 30

N051064472 RES TF 470Ω 5% 1/16W 0603 2 R31, 33

N051064820 RES TF 820Ω 5% 1/16W 0603 1 R3

N051066124 RES TF 1.24KΩ 1% 1/16W 0603 4 R60, 61, 66, 67

N051066453 RES TF 453Ω 1% 1/16W 0603 4 R56, 57, 62, 63

N051066464 RES TF 464Ω 1% 1/16W 0603 4 R48-51

N051066475 RES TF 475Ω 1% 1/16W 0603 4 R52-55

N051066487 RES TF 487Ω 1% 1/16W 0603 4 R40-43

N051066499 RES TF 499Ω 1% 1/16W 0603 4 R44-47

N051100010 RES NET QUAD ISO 10KΩ 5% 1/16W 11 RP1-4, 6-12

N051100047 RES NET QUAD ISO 47Ω 5% 1/16W 9 RP13-21

N051101701 RES TF 36Ω 5% 1/8W 1206 1 R35

N051101706 RES CF 47Ω 5% 1/8W 1206 1 R70

N051130082 RES TF 8.2Ω 5% 1/4W 1210 1 R13

N051130220 RES TF 220Ω 5% 1/4W 1210 2 R19, 21

N051130330 RES TF 330Ω 5% 1/4W 1210 2 R20, 22

N052007006 CAP CER NPO 6.8PF 50V 5% 1206 2 C11, 13

6-3

Parts Lists

PC2R/PC2/PC2X

N052007406 CAP CER N90 2200PF 50V 5% 1206 4 C71, 72, 75, 76

N052007503 CAP CER X7R 0.1UF 50V 10% 1206 46 C5, 615-38, 41-43, 47, 60-63, 69, 70, 73, 74, 77-81, 86, 87, 91

N052007809 CAP CER NPO 100PF 50V 5% 0603 1 C1

N052007833 CAP CER NPO 33PF 50V 5% 0603 4 C9, 10, 12, 14

N052080010 CAP CER NPO 1000PF 50V 5% 0805 2 C2, 7

N052900747 CAP ELE GP 47UF 35V SZE SMT 5 C48-51, 68

N052901610 CAP ELECT GP 10UF 16V 20% SZB SMT 8 C39, 44-46, 64-67

N052901622 CAP ELCCT GP 220UF 10V 20% SZE SMT 1 C3

N052902522 CAP ELECT GP 22UF 35V 20% SZD SMT 1 C40

N053000703 DIODE RECT GP SMT 1A S1A SMA 1N4001 1206 1 D5

N053000802 DIODE SWITCH 1N4148 SMT DL-35 2 D2, 3

N054000102 TRANSISTOR KST3904 SOT-23 1 Q1

N054000802 TRANSISTOR MMBT2222L SOT-23 1 Q2

N054002906 TRANSISTOR MMBT2907L SOT-23 2 Q3, 4

N055001505 IND FE BD 2.5-TURN SMT 2 L1, 2

N055001509 IND FE BD SMT 200mA 600Ω 100MHZ 0805 2 R11, 12

N059010060 XTL 20.0000MHz +/-50PPM FND PAR 18PF SMT 1 Y1

N059010061 XTL 24.576MHz +/-50PPM FND FAR 18PF SMT 1 Y2

N061000802 IC LOGIC FAIRCHILD (TI) SN74AHCIGO8DBVR 3 U3, 4, 18

N061000912 IC LOGIC INV TINY UHS UNBUF SOT23-5 2 U12, 13

N061007139 IC LOGIC 74VHC139 SOP16 1 U10

N061007144 IC LOGIC 74VHC14 SOP14-150 1 U1

N061011008 IC LOGIC 74AC08 SOP14-150 2 U6, 14

N061011245 IC LOGIC 74HC245 SOP20 1 U8

N062004905 IC IF UART ST16C550 W/FIFO'S PLCC 44P 1 U22

N062004913 IC IF DAC AK4393VF DL 24B DS +5VS VSOP28 1 U23

N062005525 IC MEM FLSH ROM 1MX16 70nS SSOP56-525 5V 1 U5

N062005704 IC GAL 16V8A-15QJ SMT PLCC20 1 U21

N062100410 IC MEM SRAM 256kX16 55nS TSOP44-400 LO\ PWR 1 U7

N062100416 IC MEMORY DRAM 1MX16 70nS(max) SOJ42 2 U16, 17

N064003508 IC ANA OPAMP DL BIP LO-NOIS NE5532A 4 U24-27

N083016001 IC MASKROM PC2 BASE HI 830160-001 1 U19

N083016101 IC MASKROM PC2 BASE LO 830161-001 1 U20

N252007456 CAP CER NPO 5600PF 50V 5% 1206 8 C52-59

N253000702 DIODE SHTKY SIG 5NS LO-C SL BAS40 SOT-23 2 D1, 4

N262001301 IC MC 68331CPV25 MOTOROLA 1 U2

N266000412 IC CUSTOM MABEL-2 2 U9, 11

N266000801 IC LISA VY06514 PLCC84 1 U15

N035040105 BATTERY COINCELL 3V 195mah CR2032 TOSHIBA 1


6-4

Parts Lists

PC2/PC2X

PC2/PC2X

Front Panel Board, N012400052


N032009401 FRONT PANEL PCB SUPPORT BRACKET PC-88 1

N035026011 BUTTON SM W/LED (3GANG) 5

N035026012 BUTTON SM W/LED RED PC2/X 1

N035026101 BUTTON LG W/LED PC-88 13

N035026141 BUTTON LG W/LED (1,2,3,4) PC2/X 1




N035026145 BUTTON LG NO LED(3) (1,2,3) PC2/X 1



N035026148 BUTTON LG NO LED(3) (+/-,0,CLEAR) 1

N035026149 BUTTON LG NO LED(1) (CANCEL) PC2/X 1

N035026150 BUTTON LG NO LED(1) (ENTER) PC2/X 1

N035026151 BUTTON LG W/LED (SOLO) PC2/X 1

N035026152 BUTTON LG W/LED (EQ) PC2/X 1

N035026153 BUTTON LG W/LED (SW1) PC2/X 1





N035026217 BUTTON LG NO LED 6

N035026611 LCD SUPPORT BEZEL 1

N035026711 SPIN KNOB BEZEL 1

N041031220 HEADER .1” SP DUAL ROW 20P 1 J604

N041032205 CONN WIRE TRAP 2.00mmSP 5P R/A 1 J701

N041032305 CONN WIRE TRAP 2.00mmSP 5P R/A 1 J601

N041032308 CONN WIRE TRAP 2.00mmSP 8P 1 J602

N043003703 SWITCH TACT SPST 6mmX6mm 160GF 72 S1-72

N044010501 ENCODER 36 STEP 2BIT 1 SP1

N045010111 LED T1 RED HI EFF DIFFUSED LTL-422 49 D1-7, 9-12, 14-16, 20-24, 26-29, 32, 34-38, 40, 42-44, 48, 50-53, 55-60, 63, 66-69

N045010612 LED MINI GREEN DIFUSSED T1 3 D33, 41, 49

N051005010 RES CF 1Ω 5% 1/8W 1 R8

N051100102 RES CF 15Ω 5% 1/8W 7 R1-7

6-5

Parts Lists

PC2/PC2X

Connector Board, N012300061

N051100157 RES CF 10KΩ 5% 1/8W 18 R9-26

N052001204 CAP CER MONO Z5U .1UF 50V 20% .3AX 3 C2-4

N054000801 TRANSISTOR PN2222 TO-92 7 Q1-7

N054001201 TRANSISTOR PNP KTA1271(KSA643CY) TO-9 10 Q8-17

N061000301 IC LOGIC 74LS145 DIP16-300 1 U2

N061014001 IC LOGIC 74HC541 DIP20 1 U1

N061020501 IC LOGIC 74HC373 DIP20 1 U3

N252003102 CAP ELECT ECE-BOJU471 470UF 6.3V VERT AX 2 C1, 6


RES TF 7.5KΩ 5% 1/8W 1206 1 R19

N025224508 TAPPING SCREW-2 BH 3.5X8 WHITE W/WASHER 3

N025323308 MACHINE SCREW BH M3X8 BLK 1

N032038811 BRACKET SUPPORT I/O PCB PC2/X 1

N032038816 BRACKET SUPPORT POWER JACK PC2/X 1

N032064801 EXTRUSION HEAT TRANSFER 1

N041006503 CONN PWR JACK 4P W/SHIELD UNITOP 1 J321

N041021903 JACK PHONE RCA TYPE TA PCMT 1 J300

N041025308 HEADER .156” SP 8P (09-65-2088) 1 J301

N041030033 MODULAR JACK 6P R/A AMP 555163-1 1 J316

N041030310 CONN MIDI JACK 3-GANG YKF 51-5041(JALCO) 1 J320

N041031220 HEADER .1” SP DUAL ROW 20P (057-020-153) 3 J304, 306, 307





N041034401 PHONE JACK MONO 1/4” RA49C-12A MONO 3 J317-319

N041034411 CONN STEREO 1/8” W/SWITCH UNITOP 1 J315

N041034501 PHONE JACK STEREO 1/4” RA49C-14B 5 J310-314

N043003702 SWITCH POWER DPDT NKK M2022TXW30-DA 1 S2

N043010510 SWITCH SLIDER R/A 2.5mmSP SPDT 1 S1

N051064005 RES TF 56Ω 5% 1/16W 0603 4 R93, 96, 99, 102

N051064011 RES TF 110Ω 5% 1/16W 0603 12 R17, 20, 65, 68, 69, 73-75, 94, 95, 97, 98

N051064015 RES TF 1.5KΩ 5% 1/16W 0603 1 R22

N051064022 RES TF 220Ω 5% 1/16W 0603 4 R100, 101, 126, 128

N051064110 RES TF 10KΩ 5% 1/16W 0603 21 R1-3, 9, 10, 12-14, 24, 70, 77, 84-86, 108, 109, 121, 144, 146, 147, 149

N051064150 RES TF 150Ω 5% 1/16W 0603 1 R81

N051064470 RES TF 470Ω 5% 1/16W 0603 1 R118

N051100010 RES NET QUAD ISO 10KΩ 5% 1/16W 3.2mmX1.6mm 5 RP9-13


N051101706 RES CF 47Ω 5% 1/8W 1206 2 R134, 137

N051101708 RES TF 56Ω 5% 1/8W 1206 2 R4, 5


6-6

Parts Lists

PC2/PC2X

N051101721 RES CF 270Ω 5% 1/8W 1206 2 R6, 83

N051101724 RES 470 5% 1/8W 1206 2 R18, 117

N051101730 RES CF 1.0KΩ 5% 1/8W 1206 3 R87, 120, 148

N051101734 RES TF 1.5KΩ 5% 1/8W 1206 1 R82

N051101738 RES CF 2.2KΩ 5% 1/8W 1206 2 R8, 66

N051101760 RES CF 20KΩ 5% 1/8W 1206 1 R80

N051101768 RES TF 680KΩ 5% 1/8W 1206 3 R76, 78, 79

N051101780 RES CF 100KΩ 5% 1/8W 1206 7 R7, 15, 88-91, 150

N051101783 RES TF 200KΩ 5% 1/8W 1206 1 R145

N051101790 RES CF 1.0MΩ 5% 1/8W 1206 5 R11, 16, 71, 72, 119

N051101794 RES CF 1.5MΩ 5% 1/8W 1206 1 R63

N051102302 POT R/A 10K 12RV03 (JUNG POONG) 1 R107

N051103073 RES CF 165KΩ 1% 1/8W 1206 1 R64

N051103121 RES TF 121KΩ 1% 1/8W 1206 1 R67

N051103151 RES TF 15.00KΩ 1% 1/8W 1206 8 R122, 123, 132, 133, 135, 136, 138, 142

N051120030 RES TF 3.0KΩ 5% 1/8W 1206 3 R106, 127, 129

N051125201 RES TF 200Ω 1% 1/4W 1210 4 R124, 130, 139, 141

N052001223 CAP CER MONO 0.22UF 50V 20% AX 1 C39

N052001712 CAP ELECT 1000UF 25V RAD 1 C30

N052002412 CAP ELECT 470UF 25V 20% .2SP 1 C31

N052007401 CAP CER NPO 100PF 50V 5% 1206 2 C46, 55

N052007503 CAP CER X7R 0.1UF 50V 10% 1206 21 C12, 13, 23, 24, 29, 32, 33, 35, 38, 41, 42, 44, 45, 48-54, 56

N052007810 CAP CER X7R 1000PF 50V 10% 0603 21 C1-3, 6, 8-11, 14-22, 25-27, 47

N052007833 CAP CER NPO 33PF 50V 5% 0603 2 C4, 5

N052901601 CAP ELECT GP 100UF 16V 20% SZC SMT 4 C28, 34, 36, 37

N052901602 CAP ELECT GP 0.197” SP RAD 1000UF 16V 20% 1 C40

N052901610 CAP ELECT GP 10UF 16V 20% SZB SMT 1 C7

N053000703 DIODE RECT GP SMT 1A S1A SMA 1N4001 1206 5 D12, 14, 15, 17, 22

N053000802 DIODE SWITCH 1N4148 SMT DL-35 14 D1-11, 13, 16, 21

N054000802 TRANSISTOR MMBT2222L SOT-23 4 Q2, 7, 9, 18

N054002906 TRANSISTOR MMBT2907L SOT-23 6 Q1, 3, 4, 8, 12, 13

N054010301 TRANSISTOR NPN KSC2331-Y 2 Q14, 15

N055001505 IND FE BD 2.5-TURN SMT 2 L3, 4

N055001509 IND FE BD SMT 200mA 600Ω 100MHz 0805 2 L1, 2


N061010302 IC LOGIC 74HCU04 SOP14 1 U5

N061014002 IC LOGIC 74HC4051 SOP16-200 1 U11

N061014003 IC LOGIC MC74HC541DW SOP-20 1 U2

N063002302 IC OPT COUPLER PC410 1 U7

N064001602 IC LINEAR OPAMP TL072 SOP8-160 1 U3

N064003508 IC ANA OPAMP DL BIP LO-NOIS NE5532A 1 U9

N064010031 IC COMPARATOR QUAD LM339 SOIC14/14W 1 U4

N064010804 IC LINEAR -12V LM79L12 SOP8 1 VR3

N064010805 IC LINEAR +5V KA78T05 5V 3A TO-220 1 VR1

N064010806 IC LINEAR +12V LM78M12 TO-220 1 VR2

N215000105 SCHOTT TRANSFORMER 67129600 1 L5

N262100608 IC MICROCONTROLLER M37451M8-731FP 1 U1


6-7

Parts Lists

PC2/PC2X

LCD Board, N012103800

Pitch & Mod Wheel Assembly, N012300053


N013040112 CABLE ENGINE TO LCD 14P RIBBON 1

N013042601 CABLE ENGINE TO LCD BACKLIGHT 2P PC2/X 1

N045010302 LCD UC-20212BLANO SAMSUNG PC-88/MX 1


N013040122 CABLE POT TO WHEEL BD 3P #26 AWG 4 2

N041030007 HEADER 0.1” SP 4P (22-03-2041) 2 J202, 203


N051100118 RES CF 220Ω 5% 1/8W 2 R18, 19

N051100132 RES CF 1KΩ 5% 1/8W 1 R17

N051100310 RES MF 1KΩ 1% 1/8W 1 R12

N051100316 RES MF 1.5KΩ 1% 1/8W 1 R13

N051100336 RES MF 4.99KΩ 1% 1/8W 2 R16, 20

N051100354 RES MF 10KΩ 1% 1/8W 2 R9, 10

N051100379 RES 110K 1/8W 1% 2 R6, 7

N051100439 RES MF 30.1KΩ 1% 1/8W 3 R4, 5, 8

N051100850 RES MF 2.49KΩ 1% 1/8W 1 R11

N051101401 RES POT 100K 3/4 TURN 2 R14, 15

N051101410 RES TRIMPOT 50K 3/4 TURN 1 R3

N051102301 POT ROTARY 10K (K2000) 2 R1, 2

N052001204 CAP CER MONO Z5U .1UF 50V 20% .3AX 6 C1-6

N064001903 IC LINEAR OPAMP TLC2272CP DIP8 3 U1-3

N025223410 TAPPING SCREW-2 BH 3X10 BLK 1


N031053800 BRACKET MOUNTING PITCH & MOD WHEEL PC2 1

N032021811 BUSHING 8.0X26 K2000 1

N032021911 SPRING TORSION MUSIC WIRE 1

N035020311 PITCH & MOD WHEEL 35 2

N035027013 PITCH & MOD WHEEL CHEEK 1

6-8

Parts Lists

PC2

Slider Board, N012400051

PC2

Final Assembly, N012000150


N035026158 BUTTON LG W/LED (ZONE1,3,4) PC2 4

N035026321 SLIDER KNOB PC-88 5

N035026411 SLIDER BEZEL PC-88 5

N039000701 SLIDE VOLUME FELT 0.3TX12X70 5



N043003703 SW TACT SPST 6mmX6mm 160GF ALPS SKHWAC 4 S1-4

N045010610 LED MINI RED/GREEN DIFUSSED T1 DKL-30RGM 4 D1-4

N051101502 SLIDER VOLUME SINGLE 10KB-LIN 45mm 5 R1-5

N053000801 DIODE 1N4148 DO-35 4 D5-8


E207407181 DOUBLE SIDE TAPE 3M (5MMX50M) #467 0.01

N013030951 CABLE TIE 13

N013041601 CABLE SLIDER TO FRONT PANEL 8P PC2/X 1

N013041701 CABLE SLIDER TO CONN BD 7P PC2/X 1

N013041801 CABLE ENGINE TO CONN BD 10P PC2/X 1

N013041901 CABLE ENGINE TO CONN BD 5P PC2/X 1

N013042001 CABLE WHEEL TO CONN BD 6P PC2/X 1

N013042101 CABLE BUTTON BD TO FRONT PANEL 5P PC2/X 1

N013042201 CABLE ENGINE TO CONN BD POWER PC2/X 1

N013042301 CABLE KEYBOARD BASS & TREBLE PC2/X 1

N013042302 CABLE KEYBOARD BASS PC2 1

N013042401 CABLE FRONT PANEL TO CONN BD PC2/X 1

N015048232 FELT 2TX20X1200 BLK KEYBOARD K2500/S 1

N022002703 SPACER PUSH LOCKING 8.0MM TALL 4

N022003714 CABLE CLAMP 14P 1


N025153512 TAPPING SCREW-1 TH 3.5X12 BLK 8

N025153520 TAPPING SCREW-1 TH 3.5X20 BLK 16




N025323414 MACHINE SCREW BH 4X14 BLK 2

N025328310 MACHINE SCREW BH 3X10 BLK W/WASHER 4

N032033632 BOTTOM PC2 1

N032037732 LEFT SUPPORT WALL PC2/X 1

N032037822 RIGHT SUPPORT WALL PC2/X 1

6-9

Parts Lists

PC2

Keyboard Assembly, N215040311

N032038813 CLAMP PCB PC2/X 5

N032038814 BRACKET CLAMPING ENCLOSURE TOP PC2/X 2

N032038815 BRACKET LOCKING ENDCAP PC2/X 2

N032038950 SPACER (BLK) 2

N032059011 PLATE COVER PCB PC2/X 1

N035020711 KNOB ENCODER 52 1

N035026511 LCD DISPLAY LENS PC-88 1

N039004322 CABLE MOUNT BASE (DAMD-10) 9

N125223408 TAPPING SCREW-2 BH 3X8 BLK (PLASTIC) 4

N125223410 TAPPING SCREW-2 BH 3X10 AN (PLASTIC) 2

N032033521 TOP COVER PC2 1

N039040004 BUMPON 3M 4

N052001022 ADAPTER 1

N035027013 CHECK PITCH & MOD WHEEL 1

N032033713 ENDCAP LEFT 1

N032033813 ENDCAP RIGHT 1

N125223408 TAPPING SCREW-2 BH 3X8 BLK (PLASTIC) 14 FOR ENDCAPS

N215040311 KEYBOARD TP-8R AFT STRIP 76 NOTE 1


PCB KEY CONTACT LOW

PCB KEY CONTACT HIGH

KEY CONTACT STRIP (12 NOTE)

BRACKET ROD/KEY WEIGHT SUPPORT 12 PO

KEY PIVOT

BRACKET ROD/KEY WEIGHT SUPPORT 4 POS

KEY NATURAL A

KEY NATURAL B

KEY NATURAL C

KEY NATURAL D

KEY NATURAL E

KEY NATURAL F

KEY NATURAL G

KEY NATURAL LOW A

KEY NATURAL HIGH C

KEY SHARP

KEY WEIGHT NATURAL

KEY WEIGHT SHARP

FELT RED

AFTER TOUCH STRIP


6-10

Parts Lists

PC2X

PC2X

Final Assembly N012000151


E207407181 DOUBLE SIDE TAPE 3M(5MMX50M)#4670.01

N013030951 CABLE TIE 13

N013041601 CABLE SLIDER TO FRONT PANEL 8P PC2/X 1

N013041701 CABLE SLIDER TO CONNECTOR BD 7P PC2/X 1

N013041801 CABLE ENGINE TO CONNECTOR BD 10P PC2/X 1

N013041901 CABLE ENGINE TO CONNECTOR BD 5P PC2/X 1

N013042001 CABLE WHEEL TO CONNECTOR BD 6P PC2/X 1

N013042101 CABLE BUTTON BD TO FRONT PANEL 5P PC2/X 1

N013042201 CABLE ENGINE TO CONN BD POWER PC2/X 1

N013042301 CABLE KEYBOARD BASS & TREBLE PC2/X 1

N013042303 CABLE KEYBOARD BASS PC2X 1

N013042401 CABLE FRONT PANEL TO CONNECTOR B/D PC2/X 1

N015047014 FELT (W/ ONE SIDE ADHESIVE) 1TX10X1000 BLK 2

N015048236 FELT 2TX17X1300 BLK KRYBOARD K2500X/XS/AES 1

N022002703 SPACER PUSH LOCKING 8.0MM TALL 4




N025226508 TAPPING SCREW-2 BH 3.5X8 BLK W/WASHER 2





N025328310 MACHINE SCREW BH 3X10 BLK W/WASHER 4

N025328610 MACHINE SCREW BH 4X10 W/SFWASHER BLK 8

N032033633 BOTTOM PC2X 1

N032037732 LEFT SUPPORT WALL PC2/X 1

N032037822 RIGHT SUPPORT WALL PC2/X 1

N032038813 CLAMP PCB PC2/X 5

N032038814 BRACKET CLAMPING ENCLOSURE TOP PC2/X 2

N032038815 BRACKET LOCKING ENDCAP PC2/X 2

N032038950 SPACER (BLK) 2

N032059011 PLATE COVER PCB PC2/X 1

N035020711 KNOB ENCODER 1

N035026511 LCD DISPLAY LENS PC-88 1

N039004322 CABLE MOUNT BASE (DAMD-10) 9


N032033522 TOP COVER PC2X 1

6-11

Parts Lists

PC2X

Keyboard Assembly, N215040413

N039040004 BUMPON 3M 4

N052001022 ADAPTER 1

N035027013 CHECK PITCH & MOD WHEEL 1

N032033713 ENDCAP LEFT 1

N032033813 ENDCAP RIGHT 1

N125223408 TAPPING SCREW-2 BH 3X8 BLK (PLASTIC) 14 FOR ENDCAPS

N125223410 TAPPING SCREW-2 BH 3X10 AN (PLASTIC) 2

N215040413 KEYBOARD TP-10MDF AFT (ABS) 1


PCB KEY CONTACT LOW

PCB KEY CONTACT HIGH

KEY CONTACT STRIP (12 NOTE)


KEY PIVOT


KEY NATURAL A

KEY NATURAL B

KEY NATURAL C

KEY NATURAL D

KEY NATURAL E

KEY NATURAL F

KEY NATURAL G

KEY NATURAL LOW A

KEY NATURAL HIGH C

KEY SHARP

KEY WEIGHT NATURAL

KEY WEIGHT SHARP

FELT RED

AFTER TOUCH STRIP


6-12

Parts Lists

PC2R

PC2R

Connector Board, N01230004


RES TF 7.5KΩ 5% 1/8W 1206 1 R19

N041006503 CONN PWR JACK 4P W/SHIELD UNITOP 1 J321

N041021903 JACK PHONE RCA TYPE TA PCMT 1 J300

N041025308 HEADER .156" SP 8P (09-65-2088) 1 J301

N041030326 HEADER .1" SP DUAL ROW 26P (057-026-153) 1 J304

N041031104 JACK 1/4" STEREO (EPJ-BBB-P) BELTON 2 J311-312

N041032305 CONN WIRE TRAP 2.00mm SP 5P (52147-0510) 1 J302


N041034010 HEADER .098" SP 10P (22-03-5105) 1 J322

N041034031 CONN MIDI TRIPLE R/A PCMT (YKF51-5046) 1 J320

N043010510 SWITCH SLIDER R/A 2.5mmSP SPDT 1 S1

N051064005 RES TF 56Ω 5% 1/16W 0603 T&R 4 R93, 96, 99, 102

N051064011 RES TF 110Ω 5% 1/16W 0603 T&R 6 R17, 20, 94-95, 97-98

N051064016 RES TF 1.6KΩ 5% 1/16W 0603 1 R118

N051064022 RES TF 220Ω 5% 1/16W 0603 2 R100-101

N051064110 RES TF 10Ω 5% 1/16W 0603 T&R 13 R1-3, 12, 14, 24, 108-109, 121, 126, 128, 144, 147

N051100010 RES NET QUAD ISO 10KΩ 5% 1/16W 4 RP9-12


N051101706 RES CF 47Ω 5% 1/8W 1206 2 R134, 137

N051101708 RES CF 56Ω 5% 1/8W 1206 2 R4-5

N051101721 RES CF 270Ω 5% 1/8W 1206 1 R6

N051101724 RES 470 5% THICK FILM 1206 2 R18, 117

N051101730 RES CF 1.0KΩ 5% 1/8W 1206 2 R120, 148

N051101734 RES TF 1.5KΩ 5% 1/8W 1206 1 R22

N051101780 RES CF 100KΩ 5% 1/8W 1206 1 R15

N051101790 RES CF 1.0MΩ 5% 1/8W 1206 3 R11, 16, 119

N051102103 RELAY 5V DPDT (G6H-2-DC5) 1 RY1

N051103151 RES TF 15.00KΩ 1% 1/8W 1206 8 R122-123, 132-133, 135-136, 138, 142

N051120030 RES TF 3.0KΩ 5% 1/8W 1206 3 R106, 127, 129

N051120056 RES TF 5.6KΩ 5% 1/8W 1206 1 R8

N051125201 RES TF 200Ω 5% 1/4W 1210 4 R124, 130, 139, 141

N052001204 CAP CER MONO Z5U 0.1UF 50V 20% 3AX 3 C1-3

N052001223 CAP CER MONO 0.22UF 50V 20% AX 1 C39

N052001711 CAP ELECT 100UF 25V 20% RAD 4 C28, 34, 36, 37

N052001712 CAP ELECT 1000UF 25V RAD 1 C30

N052002412 CAP ELECT 470UF 25V 20% .2SP 1 C31

N052007401 CAP CER NPO 100PF 50V 5% 1206 2 C46, 55

N052007503 CAP CER X7R 0.1UF 50V 10% 1206 16 C29, 32-33, 35, 38, 41-42, 44-45, 49-54, 56

N052007810 CAP CER X7R 1000PF 50V 10% 0603 10 C17-22, 25-27, 47

N052007833 CAP CER NPO 33PF 50V 5% 0603 2 C4-5

N052901602 CAP ELECT GP 0.197" SP RAD 1000UF 16V 20% 1 C40

6-13

Parts Lists

PC2R

Front Panel Assembly, N012300070

Left Front Panel Board, N012300080

N053000703 DIODE RECT GP SMT 1A S1A SMA 1N4001 1206 4 D14-15, 17, 22

N053000802 DIODE SWITCH 1N4148 SMT DL-35 2 D13, 21

N054000802 TRANSISTOR MMBT2222L SOT-23 3 Q7, 9, 18

N054002906 TRANSISTOR MMBT2907L SOT-23 4 Q4, 8, 12-13

N054010301 TRANSISTOR NPN KSC2331-Y 2 Q14-15

N055001505 IND FE BD 2.5 TURN SMT 4 L1-4


N061010302 IC LOGIC 74HCU04 SOP14 1 U5

N061014002 IC LOGIC 74HC4051 SOP16-200 1 U11

N063002302 IC OPT COUPLER PC410 SOP6-170 1 U7

N064003508 IC ANA OPAMP DL BIP LO-NOIS NE5532A 1 U9

N064010804 IC LINEAR -12V LM79L12 SOP8 1 VR3

N064010805 IC LINEAR +5V KA78T05 5V 3A TO-220 1 VR1

N064010806 IC LINEAR +12V LM78M12 TO-220 1 VR2

N215000105 SCHOTT TRANSFORMER 67129600 1 L5

N262100608 IC MICROCONTROLLER M37451M8-731FP 1 U1


N025323306 MACHINE SCREW BH 3X6 BLK 7 BRACKET CLAMPING PCB & FRONT LEFT & RIGHT

N025383306 MACHINE SCREW FH M3X6 (SMALL) 4 FRONT PANEL & BRACKET CLAMPING PCB

N031063100 BRACKET CLAMPING PCB PC2R 1

N035033900 LCD DISPLAY LEN PC2R 1

N032027426 FRONT PANEL PC2R 1


N013035412 CABLE FRONT PANEL PC2R 200mm 1

N041030036 HEADER 16P PICOFLEX MOLEX 90325-0016 1 J603

N041034002 HEADER .098" SP 2P (22-03-5025) 1 J604

N043003704 SW TACT SPST 6mmX6mm 160gf ALPS SKHHDA 6 S15-20

N045010111 LED T1 RED HI EFF DIFFUSED LTL-4221 1 D10

N045010610 LED MINI RED/GREEN DIFUSSED T1 DKL-30RGM 5 D11, 13, 15, 17, 19

N035033800 KEYCAP W/LED PC2R 6 @15-20

N051102304 POT 10K 15mmLx6mmD FLAT ELEC 4 R19-22

N035025813 POWER SWITCH VOLUME KNOB PC2R 4 @R19-22

N051101702 RES CF 15Ω 5% 1/8W 1206 2 R17, 18

N052007503 CAP CER X7R 0.1UF 50V 10% 1206 1 C7

N053000802 DIODE SWITCH 1N4148 SMT DL-35 4 D12, 14, 16, 18

N054000802 TRANSISTOR MMBT2222L SOT-23 2 Q9-10


6-14

Parts Lists

PC2R

Right Front Panel Board, N012300090

Headphone/Volume/Power Switch Board, N012700019

LCD Board, N012103802


N041030036 HEADER 16P PICOFLEX MOLEX 90325-0016 1 J602

N041030326 HEADER .1" SP DUAL ROW 26P (057-026-153) 1 J601

N043003704 SW TACT SPST 6mmX6mm 160gf ALPS SKHHDA 14 S1-14

N045010111 LED T1 RED HI EFF DIFFUSED LTL-4221 8 D1-8

N045010610 LED MINI RED/GREEN DIFUSSED T1 DKL-30RGM 1 D9

N051004710 POT 36STEP 2BIT GRAY 1 SP1

N051102303 POT 10K 20mmLX6mmD KNURLED ELEC 1 R1

N052002422 CAP ELECT 470UF 6.3V 3.5mm SP.11mm 2 C1-2

N035033800 KEYCAP W/LED PC2R 9 @S3-8, 10, 11, 12

N035033600 KEYCAP NO LED PC2R 5 @S1, 2, 9, 13, 14

N035034000 KNOB ENCODER PC2R 1 @SP1

N051101702 RES CF 15Ω 5% 1/8W 1206 2 R9, 10

N051101703 RES CF 1Ω 5% 1/8W 1206 1 R2

N051101757 RES CF 10KΩ 5% 1/8W 1206 12 R3-8, 11-16

N052007503 CAP CER X7R 0.1UF 50V 10% 1206 7 C3-6, 8-10

N054000802 TRANSISTOR MMBT2222L SOT-23 2 Q1, 2

N054002906 TRANSISTOR MMBT2907L SOT-23 6 Q3-8

N061000302 IC LOGIC 74LS145 SOP16 1 U1

N061014003 IC LOGIC MC74HC541DW SOP-20 1 U3

N061020502 IC 74HC373A OCTAL LATCH SOIC20 1 U2


N041021007 HEADPHONE JACK (HTJ-064-05) MARK-XXX 1 J1

N041034110 HEADER 10P 1 ROW .098" SP R/A 1 J2

N251102305 POT 10K LIN PUSH SW PC2R 1 R1


N013042502 CABLE ENG TO LCD 14P PC2R 330mm 1

N013042603 CABLE ENG TO LCD BACKLIGHT 2P PC2R 1

N245010320 LCD DISPLAY 20X2 Tinama (TM202JFF6) 1

6-15

Parts Lists

PC2R

Final Assembly, N012000153


N013041802 CABLE ENG TO CONN BD 10P PC2R 160mm 1

N013042202 CABLE ENG TO CONN BD POWER PC2R 200mm 1

N032062700 FRONT PANEL 1

N039040001 BUMPON (BLACK) 3M SJ-5508 4

N052001021 ADAPTER (YCA) PC2 1

N013042801 CABLE CONN TO HEADPHONE PC2R 270mm 1

N013042901 CABLE CONN TO FRONT PANEL 26P PC2R 320mm 1

N013043001 CABLE CONN TO ENG AUDIO 5P PC2R 105mm 1

N022002703 BUTTON SUPPORT DONG-A DABS 8R 4




N025383306 MACHINE SCREW FH M3X6 (SMALL) 4

N032062301 ENCLOSURE BOTTOM PC2R 1

N032062500 ENCLOSURE TOP PC2R 1

N032064900 HEAT SINK PC2R 1


N039020700 PRESSURE STRIP BOTTOM EDGE PCB PC2R 1

6-16

Chapter 7Schematics

Description Page No.

Engine Board–Microprocessor (page 1 of 5) page 7-3

Engine Board–Master/Slave Mabels (page 2 of 5) page 7-4

Engine Board–Lisa F/X 128Ch Option, Clocks (page 3 of 5) page 7-5

Engine Board–Sound ROM, Uart, Glue, Decoupling (page 4 of 5) page 7-6

Engine Board–Audio Channel, Muting Control (page 5 of 5) page 7-7

Front Panel and IBBB Board (keyboard models)–FP Buttons and LEDs (page 1 of 2) page 7-8

Front Panel and IBBB Board (keyboard models)–IBBB Buttons and LEDs (page 2 of 2) page 7-9

Connector Board (keyboard models)–Scanner (page 1 of 3) page 7-10

Connector Board (keyboard models)–Digital Interface (page 2 of 3) page 7-11

Connector Board (keyboard models)–Power Supply/Audio (page 3 of 3) page 7-12

Slider Board (keyboard models)–Sliders page 7-13

Right Front Panel Board (rack models)–FP Buttons and LEDs (page 1 of 2) page 7-14

Left Front Panel Board (rack models)–Controllers, FP Buttons and LEDs (page 2 of 2) page 7-15

Connector Board (rack models)–Scanner (page 1 of 3) page 7-16

Connector Board (rack models)–Digital Interface (page 2 of 3) page 7-17

Connector Board (rack models)–Power Supply/Audio (page 3 of 3) page 7-18

Power/Volume/Headphone Board (rack models) page 7-19

Chapter 71 2

Engine Board–Microprocessor (page 1 of 5)
3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

L5

FE

BE

AD

2 1

L4

FE

BE

AD

2 1

NCGNDVCC

U2

MC68331CPV25

11 19 25 37 47 61 72 86 89 109 121 135 1442 12 20 26 35 48 54 62 74 82 91 107 120 128 1341 16 17 18 21 27 34 36 38 53 55 59 73 88 108 123 126 129

94 BERR

92 RESET

115A0

79 BKPT_L/DSCLK

85 EXTAL

78 IFETCH_L/DSI

22 PAI

13 PCLK

114 PE0/DSACK0_L

113 PE1/DSACK1_L

112 PE2/AVEC_L105PE6/SIZ0

102 PF0/MODCLK

101 PF1/IRQ1_L

100 PF2/IRQ2_L

99 PF3/IRQ3_L

98 PF4/IRQ4_L

97 PF5/IRQ5_L

96 PF6/IRQ6_L

95 PF7/IRQ7_L

76 RXD

80 TSC

84 VDDSYN

87 XFC

93 HALT

139 D0

138 D1

124 D10

122 D11

119 D12

118 D13

117 D14

116 D15

137 D2

136 D3

133 D4

132 D5

131 D6

130 D7

127 D8

125 D9

33 PGP0/IC1

32 PGP1/IC2

31 PGP2/IC3

30 PGP3/OC1

29 PGP4/OC2/OC1

28 PGP5/OC3/OC1

24 PGP6/OC4

23 PGP7/IC4/OC5

65 PQS0/MISO66 PQS1/MOSI67 PQS2/SCK68 PQS3/PCS0/SS_L69 PQS4/PCS170 PQS5/PCS271 PQS6/PCS3

75PQS7/TXD

39A1

50A10

51A11

52A12

56A13

57A14

58A15

60A16

63A17

64A18

6A19/CS6_L

40A2

7A20/CS7_L

8A21/CS8_L

9A22/CS9_L

10A23/CS10_L

41A3

42A4

43A5

44A6

45A7

46A8

49A9

142BG/CS1_L

143BGACK_L/CS2_L

141BR/CS0_L

90CLKOUT

140CSBOOT_L

3FC0/CS3_L

4FC1/CS4_L

5FC2/CS5_L

81FREEZE/QUOT

77IPIPE_L/DSO

111PE3/RMC_L

110PE4/DS_L106PE5/AS_L

104PE7/SIZ1

15PWMA

14PWMB

103R/W

83XTAL

J406

20x2 LCD

7 D008 D019 D02

10 D0311 D0412 D0513 D0614 D07

6 E

5 R/W

4 RS

2 Vdd3 VEE

1 Vss

D6DNS

12

J401

Do_Not_Install

2 BERR 1DS

7RESET9VCC

3VSEE15VSEE2

4 BKPT

8 IFTECH10 IPIPE

6 FREEZE

J403MIDI & CPU

10 +VBAT

5 IACK

4 IRQ

2 CONT

8 DIG_OUT9 GND

6 INT_RxD7 INT_TxD

1 MIDI_RxD

3 MIDI_TxD

U674AC08

45 6

U674AC08

12

3

J405

BACKLIGHT

2 GND

1 VCC

D1BAS40

13

L1S

MT

2.5T

12

L2S

MT

2.5T

12

U874HC245

2A[1]3A[2]4A[3]5A[4]6A[5]7A[6]8A[7]9A[8]

1

DIR

19

G

18 B[1]17 B[2]16 B[3]15 B[4]14 B[5]13 B[6]12 B[7]11 B[8]

J402

PC2 POWER

5+12V

3-12V25V_DIG

6MUTE

8PWRUPRST

4AGND

7BUVdd

1DGND

RP410K

1234 5

678

RP310K

1234 5

678

RP110K

1234 5

678

RP210K

1234 5

678

J404

9 A00

10 A01

11 A02

12 A03

13 A04

14 A05

15 A06

16 A07

17 A08

18 A09

19 A10

20 A11

21 A12

22 A13

23 A14

24 A15

25 A16

27 A17

28 A18

29 A19

30 A20

31 A21

2 GND18 GND2

26 GND338 GND450 GND5

1VCC149VCC2

7 CE

4 HB3 LB

5 OE

6 WE

32D00

33D01

34D02

35D03

36D04

37D05

39D06

40D07

41D08

42D09

43D10

44D11

45D12

46D13

47D14

48D15

GNDVCC

U3NC7SZ08

53

12 4

GNDVCC

U4NC7SZ08

53

12 4

+C6847uF 35V

12

+C3220uF

12

U174VHC14

3 4

U174VHC14

11 10

U1

74VHC14

13 12

U174VHC14

12

U174VHC14

5 6

GND

U7

256KX16 SRAM12 34

6 CS40 HB39 LB41 OE17 WE

5 A00

4 A01

3 A02

2 A03

1 A04

44 A05

43 A06

42 A07

27 A08

26 A09

25 A10

24 A11

23 A12

22 A13

21 A14

20 A15

19 A16

18 A17 11VCC133VCC2

7D00

8D01

9D02

10D03

13D04

14D05

15D06

16D07

29D08

30D09

31D10

32D11

35D12

36D13

37D14

38D15

DGNDVCC

U51M/2MX16 FLASH ROM

14 28 4215 29 44

37 A00

51 A01

50 A02

49 A03

48 A04

47 A05

46 A06

45 A07

43 A08

52 A09

53 A10

54 A11

2 A12

3 A13

4 A14

5 A15

13 A16

12 A17

11 A18

10 A19

9 A20

38D00

40D01

33D02

31D03

27D04

25D05

16D06

18D07

39D08

41D09

32D10

30D11

26D12

24D13

17D14

19D15

8 NC/A21

20STATUS

56VPP

36BYTE1 CE07 CE1

21 OE

55 PWD

22 WE23 WP

JP1BOOT Select 2mm

JMP

123

XJ1(DNS) BOOT Select 0.1"

JMP

123

R59100

12

R58100

12

R24.7K

12

R41.3K

12

R3820

12

R104.7K

12

R51K

12

R92.2K

12

R81K

12

Q1MMBT3904

B

C

E

C21000PF

12

C1100pF

12

C4DNS

12

C71000PF

12

C60.1 uF

12

C50.1 uF

12

R69DNS

1 2

R710K

1 2

R147

1 2

R62.2K

1 2

R138.2, 1/4W

1 2

YOUNG CHANG CO., LTD.

of Young Chang Co., Ltd. is prohibited.Reproduction without the express written consent

Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II ENGINEMICROPROCESSOR

T. THOMPSON

021197 D V4

P82RDV4 9/19/2000

1 5

VCC VCCCD[15:00] 2-C1,3-A1,4-C6

CA[20:00] 2-A1,3-A1,4-B5

BUVDD

VCC

SIZ1 4-C6DSACK1 2-A1,3-A1 SIZ0 4-C6DSACK0 CA[20]

DS CA[19]VCCCA[20] CA[18] CA[18]

CRESET CA[19] CA[17] CA[17]

BERR CA[18] CA[16] CA[16]CWEHALT CA[17] CA[15] CD[15] CA[15] CD[15]

CA[16] CD[15] CA[14] CD[14] CA[14] CD[14]COE CA[15] CD[14] CA[13] CD[13] CA[13] CD[13]CD[15] CA[14] CD[13] CA[12] CD[12] CA[12] CD[12]CD[14] E 4-C6 CA[13] CD[12] CA[11] CD[11] CA[11] CD[11]CD[13] IAK7 CA[12] CD[11] CA[10] CD[10] CA[10] CD[10]CD[12] ASICS 2-B4 CA[11] CD[10] CA[09] CD[09] CA[09] CD[09]CD[11] CA[20] CA[10] CD[09] CA[08] CD[08] CA[08] CD[08]CD[10] CA[19]

CA[09] CD[08] CA[07] CD[07] CA[07] CD[07]CD[09] CA[18] CA[08] CD[07] CA[06] CD[06] CA[06] CD[06]CD[08] CA[17]CA[07] CD[06] CA[05] CD[05] CA[05] CD[05]CD[07] CA[16] CA[06] CD[05] CA[04] CD[04] CA[04] CD[04]CD[06] CA[15] VCCCA[05] CD[04] CA[03] CD[03] CA[03] CD[03]CD[05] CA[14] CA[04] CD[03] CA[02] CD[02] CA[02] CD[02]CD[04] CA[13]CA[03] CD[02] CA[01] CD[01] CA[01] CD[01]CD[03] CA[12] VCCCA[02] CD[01] CD[00] CD[00]CD[02] CA[11] CA[01] CD[00]

CD[01] CA[10] BUVDDCD[00] CA[09]

CA[08] RESET 2-A1,3-D1,4-D6,5-C1CA[07]CA[06]

IRQ7 CA[05]IRQ6 4-C7 CA[04]

IRQ5 CA[03]IRQ4 4-C8 CA[02]

IRQ3 CA[01]IRQ2 CA[00]IRQ1

MISO 3-D6MOSI 3-D6

LCDCS 4-C6VCC

SCK 3-C6 SCKOUARTCS 4-B5SS 3-C6

CS2VCC ERAMCSCS1CS0VCC VCC FLASHCSBOOTCS

CRXD COEIFETCH RAMCS

CTXDBKPT RESETDLDIPIPE CWE 2-A1,3-A1,4-C6PAI CHB 4-C7

FREEZE CLB 4-C7

VCCDACMUTE 5-D1

MUTECA[01] 2,3,4ROM1PR 4-D5

ROM0PR 4-D5 VCC VCCOPRSNT 3-D7

PCLK BERR CWE 2,3,4 CWE 02,03,04VCCIRQ7 DSACK0

IRQ6 4-C7 CS0 CD[00]CLK25 2-A1,3-D8,5-C1

IRQ5 BOOTCS CD[01]CD[02]CD[03]CD[04]

IRQ4 4-C8 DACMUTE 5-D1 CD[05]MUTE 5-C1 IRQ3 MUTE

VCC CD[06]

IRQ2 PAI CD[07]

BERR DS IRQ1 PCLK HALTBKPT

FREEZEVCC

PWRUPRSTVCCIFETCH

CRESETIPIPE LCDCS 4-C6

LCDE 4-C7CRESET RESET 2-A1,3-D1,4-D6,5-C1

BUVDD +12VRESET 4-C6 MRXD 4-B6

MTXD 4-B7IRQ7MUTE 5-C1IAK7

CRXD+VBATCTXD

AESO 2-A8RESETDLD

~12V

2-A1,3-A1,4-C6

7-3

7-4

Engine Board–Master/Slave Mabels (page 2 of 5)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J407

ADC

12 +5Vana14 -5Vana 13AGND

4 BITCLK

9DGND

6 L/R8 MCLK

11NC

1SGND13SGND25SGND37SGND4

10 VCC

2 DATA

L3S

MT

2.5T

12

TS4

1

TS3

1

TS2

1

TS1

1

U1074VHC139

2 A3 B

1 G

4Y05Y16Y27Y3

RP710K

1234 5

8

RP1210K

1234 5

678

RP1110K

1234 5

76

8

RP810K

1234 5

678

RP610K

1234 5

678

RP910K

1234 5

6

RP5100

1234 5

678

RP1010K

1234 5

678

VCC

DGND

U11

MABEL-2

18 54 57 88 90 92 124 125 128

17 55 58 87 89 91 123 126 129

4A

DC

CT

RL0

3A

DC

CT

RL1

2A

DC

CT

RL2

127

AD

CI

7 BIAU12

21 BIUA00

20 BIUA01

19 BIUA02

16 BIUA03

15 BIUA04

14 BIUA05

13 BIUA06

12 BIUA07

11 BIUA08

10 BIUA09

9 BIUA10

8 BIUA11

6 BIUA13

5 BIUA14

122 BIUD00

121 BIUD01

120 BIUD02

119 BIUD03

118 BIUD04

117 BIUD05

116 BIUD06

115 BIUD07

94 BIUD08

95 BIUD09

96 BIUD10

97 BIUD11

98 BIUD12

99 BIUD13

100 BIUD14

101 BIUD15

56 CLK

63D

AC

CT

RL0

62D

AC

CT

RL1

61D

AC

CT

RL2

142

DA

CO

0

141

DA

CO

1

140

DA

CO

2

139

DA

CO

313

8D

MA

00

137

DM

A01

136

DM

A02

135

DM

A03

134

DM

A04

133

DM

A05

132

DM

A06

131

DM

A07

130

DM

A08

113

DM

D00

112

DM

D01

111

DM

D02

110

DM

D03

109

DM

D04

108

DM

D05

107

DM

D06

106

DM

D07

105

DM

D08

104

DM

D09

103

DM

D10

102

DM

D11

144

DM

R/W

67M

DA

TA

I64

MD

AT

AO

53SMA01

52SMA02

51SMA03

50SMA04

49SMA05

48SMA06

47SMA07

46SMA08

45SMA09

44SMA10

43SMA11

42SMA12

41SMA13

40SMA14

39SMA15

38SMA16

37SMA17

36SMA18

35SMA19

34SMA20

33SMA21

32SMA22

31SMA23

30SMA24

85SMD00

84SMD01

83SMD02

82SMD03

81SMD04

80SMD05

79SMD06

78SMD07

77SMD08

76SMD09

75SMD10

74SMD11

73SMD12

72SMD13

71SMD14

70SMD15

69SMR/W22 TCK23 TDI24 TDO25 TMS

26A

DC

_RD

Y

65 CS

1D

MC

AS

143

DM

RA

S

114 DTACK

59M

SY

NC

66 RD

86 RESET

60SMAV

29S

MF

IFO

LO

68SMRAS

28SMRCS

27SMREF

93 WR

VCC

DGND

U9

MABEL-2

18 54 57 88 90 92 124 125 128

17 55 58 87 89 91 123 126 129

4A

DC

CT

RL0

3A

DC

CT

RL1

2A

DC

CT

RL2

127

AD

CI

7BIAU12

21BIUA00

20BIUA01

19BIUA02

16BIUA03

15BIUA04

14BIUA05

13BIUA06

12BIUA07

11BIUA08

10BIUA09

9BIUA10

8BIUA11

6BIUA13

5BIUA14

122BIUD00

121BIUD01

120BIUD02

119BIUD03

118BIUD04

117BIUD05

116BIUD06

115BIUD07

94BIUD08

95BIUD09

96BIUD10

97BIUD11

98BIUD12

99BIUD13

100BIUD14

101BIUD15

56CLK

63D

AC

CT

RL0

62D

AC

CT

RL1

61D

AC

CT

RL2

142

DA

CO

014

1D

AC

O1

140

DA

CO

213

9D

AC

O3

138

DM

A00

137

DM

A01

136

DM

A02

135

DM

A03

134

DM

A04

133

DM

A05

132

DM

A06

131

DM

A07

130

DM

A08

113

DM

D00

112

DM

D01

111

DM

D02

110

DM

D03

109

DM

D04

108

DM

D05

107

DM

D06

106

DM

D07

105

DM

D08

104

DM

D09

103

DM

D10

102

DM

D11

144

DM

R/W

67M

DA

TA

I

64M

DA

TA

O

53 SMA01

52 SMA02

51 SMA03

50 SMA04

49 SMA05

48 SMA06

47 SMA07

46 SMA08

45 SMA09

44 SMA10

43 SMA11

42 SMA12

41 SMA13

40 SMA14

39 SMA15

38 SMA16

37 SMA17

36 SMA18

35 SMA19

34 SMA20

33 SMA21

32 SMA22

31 SMA23

30 SMA24

85 SMD00

84 SMD01

83 SMD02

82 SMD03

81 SMD04

80 SMD05

79 SMD06

78 SMD07

77 SMD08

76 SMD09

75 SMD10

74 SMD11

73 SMD12

72 SMD13

71 SMD14

70 SMD15

69 SMR/W22TCK23TDI24TDO25TMS

26A

DC

_RD

Y

65CS

1D

MC

AS

143

DM

RA

S

114DTACK

59M

SY

NC

66RD

86RESET

60 SMAV

29S

MF

IFO

LO

68 SMRAS

28 SMRCS

27 SMREF

93WR

R3610K

12

R1410K

12

C81000PF

12



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II ENGINEMASTER/SLAVE MABELS

T. THOMPSON

021197 D V4

P82RDV4 9/19/2000

2 5

KISI 3-D8DSACK1 1-A1,3-A1

CWE 1-A3,C4,C5;3-A1;4-C6 VCCKISO 3-A1

CA[20:00] 1-A8,3-A1,4-B5 TOPO 3-A1,D6SMWE 4-D1 CLK20 3-D8,4-D6CLK25 1-C1,3-D8,5-C1RESET 1-B4,D5;3-D1;4-D6;5-C1 DACBCLK 5-D1

JTAGMODE DACL_R 5-D1JTAGIN JTAGOUT DACDATA 5-D1

ADCMCLK JTAGCLK AESO 1-D6

SSMRCS 4-A1

SMA[25:01] 4-B1ADCDATAADCBCLK

ADCL_RSMA[25] SMA[25]

SMOE 4-A1,D1SMWE 4-D1

MSMRCS 4-A1

SMA[24] SMA[24]SMA[23] SMA[23]SMA[22] SMA[22]SMA[21] SMA[21]SMA[20] SMA[20]SMA[19] SMA[19]SMA[18] SMA[18]SMA[17] SMA[17]SMA[16] SMA[16]SMA[15] CA[14] CA[14] SMA[15]SMA[14] CA[13] VCC CA[13] SMA[14]SMA[13] CA[12] CA[12] SMA[13]SMA[12] CA[11] CA[11] SMA[12]SMA[11] CA[10] CA[10] SMA[11]SMA[10] CA[09] CA[09] SMA[10]SMA[09] CA[08] CA[08] SMA[09]SMA[08] CA[07] CA[15] MMABELCS CA[07] SMA[08]SMA[07] CA[06] CA[16] SMABELCS CA[06] SMA[07]SMA[06] CA[05] LISACS 3-A1 CA[05] SMA[06]SMA[05] CA[04] ASICS 1-B3 CA[04] SMA[05]SMA[04] CA[03] CA[03] SMA[04]SMA[03] CA[02] CA[02] SMA[03]SMA[02] CA[01] CA[01] SMA[02]SMA[01] SMA[01]

SMD[15] CD[15] CD[15] SMD[15]SMD[14] CD[14] CD[14] SMD[14]SMD[13] CD[13] CD[13] SMD[13]SMD[12] CD[12] CD[12] SMD[12]SMD[11] CD[11] CD[11] SMD[11]SMD[10] CD[10] CD[10] SMD[10]SMD[09] CD[09] CD[09] SMD[09]SMD[08] CD[08] CD[08] SMD[08]SMD[07] CD[07] CD[07] SMD[07]SMD[06] CD[06] CD[06] SMD[06]SMD[05] CD[05] CD[05] SMD[05]SMD[04] CD[04] CD[04] SMD[04]SMD[03] CD[03] CD[03] SMD[03]SMD[02] CD[02] CD[02] SMD[02]SMD[01] CD[01] CD[01] SMD[01]SMD[00] CD[00] CD[00] SMD[00]

SD

MD

[00]

SD

MD

[01]

SD

MD

[02]

SD

MD

[03]

SD

MD

[04]

SD

MD

[05]

SD

MD

[06]

SD

MD

[07]

SD

MD

[08]

SD

MD

[09]

SD

MD

[10]

SD

MD

[11]

MD

MD

[11]

MD

MD

[10]

MD

MD

[09]

MD

MD

[08]

MD

MD

[07]

MD

MD

[06]

MD

MD

[05]

MD

MD

[04]

MD

MD

[03]

MD

MD

[02]

MD

MD

[01]

MD

MD

[00]

CD[15:00] 1-A8,3-A1,4-C6SMD[15:00] 4-C1

VCC VCCSDMD[05] MDMD[05]SDMD[03] MDMD[03]SDMD[02] MDMD[02]SDMD[01] MDMD[01]

ADCDATA VCC VCC+12V SDMD[11] MDMD[11]

SDMD[10] MDMD[10]SDMD[09] MDMD[09]

ADCBCLK SDMD[08] MDMD[08]ADCL_R

ADCMCLK

SDMD[07] MDMD[07]SDMD[06] MDMD[06]

~12VSDMD[04] MDMD[04]SDMD[00] MDMD[00]

DO NOT INSTALL DO NOT INSTALL

FOUR DECOUPLING CAPS ON U9 & U11, ONE ON EACH SIDE

DO NOT INSTALL

DO NOT INSTALL

SLAVE MASTER

67

87

Engine Board–Lisa F/X 128Ch Option, Clocks (page 3 of 5)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

DGND

U321M/4Mx16 DRAM

26 39 45 50

21 A0/A2

22 A1/A3

23 A2/A4

24 A3/A5

27 A4/A6

28 A5/A7

29 A6/A8

30 A7/A9

31 A8/A10

32 A9/A11

2D00

3D01

4D02

5D03

7D04

8D05

9D06

10D07

41D08

42D09

43D10

44D11

46D12

47D13

48D14

49D15

19 NC/A0

20 NC/A1

1VCC16VCC212VCC325VCC4

35 LCAS1M38 LCAS4M

33 OE1M36 OE4M

18 RAS1M14 RAS4M34 UCAS1M37 UCAS4M

17 W1M13 W4M

DGND

U311M/4Mx16 DRAM

26 39 45 50

21 A0/A2

22 A1/A3

23 A2/A4

24 A3/A5

27 A4/A6

28 A5/A7

29 A6/A8

30 A7/A9

31 A8/A10

32 A9/A11

2D00

3D01

4D02

5D03

7D04

8D05

9D06

10D07

41D08

42D09

43D10

44D11

46D12

47D13

48D14

49D15

19 NC/A0

20 NC/A1

1VCC16VCC212VCC325VCC4

35 LCAS1M38 LCAS4M

33 OE1M36 OE4M

18 RAS1M14 RAS4M34 UCAS1M37 UCAS4M

17 W1M13 W4M

DGND

U171Mx16 DRAM

22 37 42

31 LCAS

29 OE

14 RAS30 UCAS

13 W

17 A0

18 A1

19 A2

20 A3

23 A4

24 A5

25 A6

26 A7

27 A8

28 A9

2D00

3D01

4D02

5D03

7D04

8D05

9D06

10D07

33D08

34D09

35D10

36D11

38D12

39D13

40D14

41D15

1VCC16VCC221 VCC3

DGND

U161Mx16 DRAM

22 37 42

31 LCAS

29 OE

14 RAS30 UCAS

13 W

17 A0

18 A1

19 A2

20 A3

23 A4

24 A5

25 A6

26 A7

27 A8

28 A9

2D00

3D01

4D02

5D03

7D04

8D05

9D06

10D07

33D08

34D09

35D10

36D11

38D12

39D13

40D14

41D15

1VCC16VCC221 VCC3

VR2

LM3940IS-3.3

2

GND

1 IN 3OUT

JP25V/3V

21 3

U2874LCX2245

2A[1]3A[2]4A[3]5A[4]6A[5]7A[6]8A[7]9A[8]

1

DIR

10GND

19

G

18 B[1]17 B[2]16 B[3]15 B[4]14 B[5]13 B[6]12 B[7]11 B[8]20 VCC

DGND

U2974LCX162245

4 10 15 21 28 34 39 45

48G1

25

G2

47A1[1]46A1[2]44A1[3]43A1[4]41A1[5]40A1[6]38A1[7]37A1[8]

36A2[1]35A2[2]33A2[3]32A2[4]30A2[5]29A2[6]27A2[7]26A2[8]

24

DIR2

18VCC1

7VCC231 VCC3

42 VCC4

2 B1[1]3 B1[2]5 B1[3]6 B1[4]8 B1[5]9 B1[6]

11 B1[7]12 B1[8]

13 B2[1]14 B2[2]16 B2[3]17 B2[4]19 B2[5]20 B2[6]22 B2[7]23 B2[8]

1 DIR1

DGND

U3074LCX162245

4 10 15 21 28 34 39 45

48G1

25

G2

47A1[1]46A1[2]44A1[3]43A1[4]41A1[5]40A1[6]38A1[7]37A1[8]

36A2[1]35A2[2]33A2[3]32A2[4]30A2[5]29A2[6]27A2[7]26A2[8]

24

DIR2

18VCC1

7VCC231 VCC3

42 VCC4

2 B1[1]3 B1[2]5 B1[3]6 B1[4]8 B1[5]9 B1[6]

11 B1[7]12 B1[8]

13 B2[1]14 B2[2]16 B2[3]17 B2[4]19 B2[5]20 B2[6]22 B2[7]23 B2[8]

1 DIR1

U1474AC08

1213 11

U1474AC08

910 8

U1474AC08

12 3

U1474AC08

45 6

U674AC08

910

8

U674AC08

1213 11

U13NC7SZU04

2 4

U12NC7SZU04

2 4

C88.47uF

12

C870.1 uF

12

C860.1 uF

12

C230.1 uF

12

C220.1 uF

12

C810.1 uF

12

C800.1 uF

12

C790.1 uF

12

C850.1 uF

12

C840.1 uF

12

C830.1 uF

12

C820.1 uF

12

C900.1 uF

12

TS5

1

TS6

1

J408128 CHANNEL OPTION

17 RESET

3 SS

15 CLK20

19 CLK2521 GND3

11 KISI

7 MISO9 MOSI

5 SCK

13 TOPO

1 VCC1

23 VCC3

8PRSNT

4GND2

22GND4

6SGND1

10SGND212SGND314SGND416SGND518SGND620SGND7

2VCC2

24VCC4

RP2147

1234 5

678

RP19471234 5

678

RP2047

1234 5

678

RP1647

1234 5

678

RP15471234 5

678

RP1447

1234 5

678

RP13471234 5

678

RP18 47

12345

678

RP17 4712345

678

+C8933uF, TANT

12

DGNDVCC

U15 LISA

4 17 41 51 71 805 18 42 52 73 81

6 A[0]

7 A[1]

8 A[2]

9 A[3]

10 A[4]

11 A[5]

12 A[6]

13 A[7]

14 A[8]

15 A[9]

72 CLK

67 D[00]

68 D[01]

69 D[02]

70 D[03]

74 D[04]

75 D[05]

76 D[06]

77 D[07]

78 D[08]

79 D[09]

82 D[10]

83 D[11]

84 D[12]

1 D[13]

2 D[14]

3 D[15]

24 KISI027 KISI1

26KISO

21 R/W

30SMR/W

20 CS

23 DTACK

22 RESET

29SMCAS

28SMRAS25 TOP

31DMA[0]

32DMA[1]

33DMA[2]

34DMA[3]

35DMA[4]

36DMA[5]

37DMA[6]

38DMA[7]

39DMA[8]

40DMA[9]

66DMD[00]

65DMD[01]

19DMD[02]

16DMD[03]

43DMD[04]

44DMD[05]

45DMD[06]

46DMD[07]

47DMD[08]

48DMD[09]

49DMD[10]

50DMD[11]

53DMD[12]

54DMD[13]

55DMD[14]

56DMD[15]

57DMD[16]

58DMD[17]

59DMD[18]

60DMD[19]

61DMD[20]

62DMD[21]

63DMD[22]

64DMD[23]

R641.5K

12

R651.5K

12

R1810K

12

R20330, 1/4W

12

R19220, 1/4W

12

R22330, 1/4W

12

R21220, 1/4W

12

R2310K

12

R3710K

12

R1710K

12

Y2

24.5760MHz

12

Y1

20.0000MHZ

12

C1433PF

12

C1033PF

12

C136.8pF,50V,NPO

12

C1233PF

12

C933PF

12

C116.8pF,50V,NPO

12

R39471 2

R38

100

1 2

R151M

1 2

R161M

1 2



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II ENGINELISA F/X, 128CH OPTION, CLOCKS

T. THOMPSON

021197 D V4

P82RDV4 9/19/2000

3 5

3VCCTOPO 2-A8 SMRAS BSMRASKISO 2-A8SMCAS BSMCASSMR/W BSMR/WDMDD[23] VCCDMDD[22]

RESET 1-B4,D5;2-A1;4-D6;5-C1 DMDD[21]DMDD[20] DMDD[23] DMD[23] DMD[23] DMD[07]

LISACS 2-B5 DMDD[19] DMDD[22] DMD[22] DMD[22] DMD[06]CWE 1-A3,C4,C5;2-A1;4-C6 DMDD[18] DMDD[21] DMD[21] DMDD[23] DMD[23] DMD[21] DMD[05]

DSACK1 1-A1,2-A1 DMDD[17] DMDD[20] DMD[20] DMDD[22] DMD[22] DMD[20] DMD[04]CA[20:00] 1-A8,2-A1,4-B5 CA[09] DMDD[16] DMDD[19] DMD[19] DMDD[21] DMD[21] DMD[19] DMD[03]

CA[08] DMDD[15] DMDD[18] DMD[18] DMDD[20] DMD[20] DMD[18] DMD[02]CA[07] DMDD[14] DMDD[17] DMD[17] DMDD[19] DMD[19] DMA[09] DMD[17] DMA[09] DMD[01]CA[06] DMDD[13] DMDD[16] DMD[16] DMDD[18] DMD[18] DMA[08] DMD[16] DMA[08] DMD[00]CA[05] DMDD[12] DMDD[17] DMD[17] DMA[07] DMD[15] DMA[07]CA[04] DMDD[11] DMDD[16] DMD[16] DMA[06] DMD[14] DMA[06]CA[03] DMDD[10] DMDD[15] DMD[15] DMA[05] DMD[13] DMA[05]CA[02] DMDD[09] DMDD[14] DMD[14] DMA[04] DMD[12] DMA[04]CA[01] DMDD[08] DMDD[13] DMD[13] DMDD[15] DMD[15] DMA[03] DMD[11] DMA[03]

DMDD[07] DMDD[12] DMD[12] DMDD[14] DMD[14] DMA[02] DMD[10] DMA[02]

CD[15:00] 1-A8,2-C1,4-C6 DMDD[06] DMDD[11] DMD[11] DMDD[13] DMD[13] DMA[01] DMD[09] DMA[01]CD[15] DMDD[05] DMDD[10] DMD[10] DMDD[12] DMD[12] DMA[00] DMD[08] DMA[00]CD[14]DMDD[04] DMDD[09] DMD[09] DMDD[11] DMD[11]CD[13] DMDD[03] DMDD[08] DMD[08] DMDD[10] DMD[10]CD[12]DMDD[02] DMDD[09] DMD[09]CD[11] DMDD[01] DMDD[08] DMD[08]CD[10]DMDD[00]CD[09]

CD[08] DMAA[09]DMDD[07] DMD[07]CD[07] DMAA[08] DMDD[06] DMD[06]CD[06] DMAA[07]DMDD[05] DMD[05]CD[05] DMAA[06] DMDD[04] DMD[04]CD[04] DMAA[05] DMDD[07] DMD[07] DMDD[03] DMD[03]

CD[03] DMAA[04] DRAM_PWR DRAM_PWRDMDD[06] DMD[06] DMDD[02] DMD[02]CD[02] DMAA[03] DMDD[05] DMD[05] DMDD[01] DMD[01]CD[01] DMAA[02] DMDD[04] DMD[04] DMDD[00] DMD[00]CD[00] DMAA[01] DMDD[03] DMD[03]

DMAA[00] DMDD[02] DMD[02]DMDD[01] DMD[01] SMRAS BSMRASDMDD[00] DMD[00]

SMCAS BSMCASSMR/W BSMR/W

VCCDMAA[09] DMA[09]DMAA[08] DMA[08]

SMR/WSMCAS

DMD[23] DMD[07]DMAA[07] DMA[07] DMD[22] DMD[06]DMAA[06] DMA[06]VCC DMD[21] DMD[05]DMAA[05] DMA[05] DMD[20] DMD[04]DMAA[04] DMA[04] DMD[19] DMD[03]DMAA[03] DMA[03] DMD[18] DMD[02]DMAA[02] DMA[02] DMD[17] DMD[01]DMAA[01] DMA[01] DMD[16] DMD[00]

SMRAS BSMRAS DMAA[00] DMA[00] DMD[15]SMCAS BSMCAS DMA[09] DMA[09]DMD[14]SMR/W BSMR/W DMA[08] DMA[08]DMD[13]DMA[07] DMA[07]DMD[12]

DMA[06] DMA[06]DMD[11]DMA[05] DMA[05]DMD[10]DMAA[09] DMA[09] DMA[04] DMA[04]DMD[09]DMAA[08] DMA[08] DMA[03] DMA[03]DMD[08]VCC DMA[02] DMA[02]

DMA[01] DMA[01]3VCCDMAA[07] DMA[07] DMA[00] DMA[00]

DMAA[06] DMA[06] DMA[09] DMA[09]DMAA[05] DMA[05] DMA[08] DMA[08]DMAA[04] DMA[04]DMAA[03] DMA[03] VCCDMAA[02] DMA[02] VCC VCCDMAA[01] DMA[01]VCCDMAA[00] DMA[00] 3VCC

DRAM_PWRVCC

VCC VCC VCC

SS 1-C1SCK 1-C1

MISO 1-B1,C3MOSI 1-B1,C3 KISI 2-A1

OPRSNT CLK20 2-A8,4-D6TOPO 2-A8 CLK25 1-C1,

RESET 1-B4,D5;2-A1;4-D6;5-C1VCC

3VCC 3VCC 3VCC

3V ONLY

3V ONLY

3V ONLY

3V ONLY

3V ONLY

RP's Share Footprint Area with U28 - U30

Use Dual Footprint for DRAM's

LOCATE 220/330 RESISTORS AT FARTHEST POINT FROM DRIVER

LISA/MABEL Decoupling Caps

DRAM Decoupling CapsDRAM Decoupling Caps

U28 Decoupling Cap

3VCC and DRAM_PWR need fat traces

U29 Decoupling Caps U30 Decoupling Caps

DECOUPLING CAPS NEAR VCC PINS, ONE CAP ON EACH SIDEDECOUPLING CAPS NEAR PINS 1 AND 21

1-C1

2-A1,5-C1

7-5

7-6

Engine Board–Sound ROM, Uart, Glue, Decoupling (page 4 of 5)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

DGNDVCC

U20ROM4MX16

2313 32

11 A00

10 A01

9 A02

8 A03

7 A04

6 A05

5 A06

4 A07

42 A08

41 A09

40 A10

39 A11

38 A12

37 A13

36 A14

35 A15

34 A16

3 A17

2 A18

43 A19

44 A20

1 A2133BHE

15D00

17D01

19D02

21D03

24D04

26D05

28D06

30D07

16D08

18D09

20D10

22D11

25D12

27D13

29D14

31D15/A-1

12CE

14OE

DGNDVCC

U19ROM4MX16

2313 32

11 A00

10 A01

9 A02

8 A03

7 A04

6 A05

5 A06

4 A07

42 A08

41 A09

40 A10

39 A11

38 A12

37 A13

36 A14

35 A15

34 A16

3 A17

2 A18

43 A19

44 A20

1 A2133BHE

15D00

17D01

19D02

21D03

24D04

26D05

28D06

30D07

16D08

18D09

20D10

22D11

25D12

27D13

29D14

31D15/A-1

12CE

14OE

DGND:

J409ROM Option

1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 59 61 63

32 A01

31 A02

30 A03

28 A04

27 A05

26 A06

24 A07

23 A08

22 A09

20 A10

19 A11

18 A12

16 A13

15 A14

14 A15

12 A16

11 A17

10 A18

8 A19

7 A20

6 A21

4 A22

3 A23

55D00

54D01

52D02

51D03

50D04

48D05

47D06

46D07

44D08

43D09

42D10

40D11

39D12

38D13

36D14

35D15

2VCC134VCC264VCC3

58 CS

62 OE

56PRSNT60 WE

DGND:

J410ROM Option

1 5 9 13 17 21 25 29 33 37 41 45 49 53 57 59 61 63

32 A01

31 A02

30 A03

28 A04

27 A05

26 A06

24 A07

23 A08

22 A09

20 A10

19 A11

18 A12

16 A13

15 A14

14 A15

12 A16

11 A17

10 A18

8 A19

7 A20

6 A21

4 A22

3 A23

55D00

54D01

52D02

51D03

50D04

48D05

47D06

46D07

44D08

43D09

42D10

40D11

39D12

38D13

36D14

35D15

2VCC134VCC264VCC3

58 CS

62 OE

56PRSNT60 WE

U2116V8-15

16V8

11OE1 CLK

2 I13 I24 I35 I46 I57 I68 I79 I8

12O113O214O315O416O517O618O719O8

VCC: 44 GND: 22

U22ST16C550CJ44

31 A0

30 A1

29 A2

14 CS0

15 CS1

39 MR

10RCLK

25 RD

11SIN

21 WR

18XIN

28 ADS

16 CS2

40CTS

42DCD

41DSR24 RD43RI20 WR

2 D0

3 D1

4 D2

5 D3

6 D4

7 D5

8 D6

9 D7

26DDIS

33INTR

13SOUT

19XOUT

17BAUDOUT

37DTR

38OUT135OUT2

36RTS

32RXRDY

27TXRDY

C910.1 uF

12

C210.1 uF

12

C380.1 uF

12

C360.1 uF

12

C340.1 uF

12

C320.1 uF

12

C300.1 uF

12

C280.1 uF

12

C260.1 uF

12

C240.1 uF

12

C200.1 uF

12

C180.1 uF

12

C160.1 uF

12

C370.1 uF

12

C350.1 uF

12

C330.1 uF

12

C310.1 uF

12

C290.1 uF

12

C270.1 uF

12

C250.1 uF

12

C190.1 uF

12

C170.1 uF

12

C150.1 uF

12

U1074VHC139

14 A13 B

15 G

12Y011Y110Y29Y3

GNDVCC

U18NC7SZ08

53

12 4



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II ENGINESOUND ROM, UART, GLUE, DECOUPLING

T. THOMPSON

021197 D V4

P82RDV4 9/19/2000

4 5

U174VHC14

9 8

R28110

12

R2510K

12

R2410K

12

R2747

1 2

R681K

1 2

R2647

1 2

VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC

SMA[24] SROMCSSMA[25]

EXROM0CSSSMRCS 2-A8 EXROM1CSMSMRCS 2-B8 VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC

SMOE 2-A8

SMA[01] SMA[01]

SMA[23] SMA[23]SMA[22] SMA[22]SMA[21] SMA[21]SMA[20] SMA[20]SMA[19] SMA[19]SMA[18] SMA[18]SMA[17] SMA[17]SMA[16] SMA[16]SMA[15] SMA[15]SMA[14] SMA[14]SMA[13] SMA[13]SMA[12] SMA[12]SMA[11] SMA[11]SMA[10] SMA[10] MRXD 1-D6SMA[09] SMD[15] SMA[09] SMD[07]SMA[08] SMD[14] SMA[08] SMD[06]SMA[07] SMD[13] SMA[07] SMD[05]SMA[06] SMD[12] SMA[06] SMD[04]SMA[05] SMD[11] SMA[05] SMD[03] VCCSMA[04] SMD[10] SMA[04] SMD[02] CA[20:00] 1-A8,2-A1,3-A1SMA[03] SMD[09] SMA[03] SMD[01]

CA[02]SMA[02] SMD[08] SMA[02] SMD[00] CA[01]CA[00]

UARTCS 1-C3SMA[25:01] 2-A8 MTXD 1-D6

SMD[15:00] 2-D8

CWE 1-A3,C4,C5;2-A1;3-A1

CD[15:00] 1-A8,2-C1,3-A1VCC VCCCD[15]

SMA[23] SMA[23] CD[14]SMA[22] SMA[22] CD[13]SMA[21] SMA[21] CD[12] IRQ6 1-B1,C3SMA[20] SMA[20] CD[11]SMA[19] SMA[19] CD[10]SMA[18] SMA[18] CD[09]

IRQ4 1-B1,C3SMA[17] SMA[17] CD[08]SMA[16] SMD[15] SMA[16] SMD[15]

RESET 1-D5SMA[15] SMD[14] SMA[15] SMD[14]SMA[14] SMD[13] SMA[14] SMD[13]SMA[13] SMD[12] SMA[13] SMD[12]SMA[12] SMD[11] SMA[12] SMD[11]SMA[11] SMD[10] SMA[11] SMD[10]SMA[10] SMD[09] SMA[10] SMD[09]

LCDE 1-D6SMA[09] SMD[08] SMA[09] SMD[08] E 1-A3SMA[08] SMD[07] SMA[08] SMD[07] LCDCS 1-B3,D6 CHB 1-C4SMA[07] SMD[06] SMA[07] SMD[06] SIZ1 1-A3 CLB 1-C4SMA[06] SMD[05] SMA[06] SMD[05] SIZ0 1-A3 CD[04]VCC VCCSMA[05] SMD[04] SMA[05] SMD[04] CA[00]SMA[04] SMD[03] SMA[04] SMD[03]SMA[03] SMD[02] SMA[03] SMD[02]SMA[02] SMD[01] SMA[02] SMD[01] RESET 1-B4,D5;2-A1;3-D1;5-C1 CLK5SMA[01] SMD[00] SMA[01] SMD[00]

CLK20 2-A8,3-D8EXROM0CS

SMWE 2-A6,B8 ROM1PR 1-C1SMOE 2-A8

EXROM1CSROM0PR 1-C1

DECOUPLING

Engine Board–Audio Channel, Muting Control (page 5 of 5)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

GJ1Ground Join

2 1

VR178M05

2

GND

1 IN 3OUT

+

-U27NE5532

3

2

84

1

+

- U26NE5532

3

2

84

1

J411

BV-32

2+13+2

1-

J412

PC2 AUDIO OUT

2 LOUT~

4 ROUT+

5 ROUT~

3 AGND

1 LOUT+

C545600pF 5% NPO

1 2

C555600pF 5% NPO

1 2

C535600pF 5% NPO

1 2

C525600pF 5% NPO

1 2

C700.1 uF

12

C690.1 uF

12

C470.1 uF

12

C410.1 uF

12

C585600pF 5% NPO

12

C595600pF 5% NPO

12

C76

2200pF 5% NPO

12

C75

2200pF 5% NPO

12

C575600pF 5% NPO

12

C565600pF 5% NPO

12

C71

2200pF 5% NPO

12

C72

2200pF 5% NPO

12

C420.1 uF

12

C430.1 uF

12

U23

AK4393

4 PD

18AVDD

19AVSS

5 BICK

26CKS0

27CKS1

28CKS2

10 DEM011 DEM1

9 DFS

12 DIF013 DIF114 DIF2

2 DVDD

1 DVSS

7 LRCK

3 MCLK25P/_S

6 SDATA

8 SMUTE

15SVSS

17VREFH16VREFL

23AOUTL+

22AOUTL-

21AOUTR+

20AOUTR-

24VCOM

+

- U27NE5532

5

67 +

- U25

NE5532

5

67

+

- U24

NE5532

5

67

+

- U26NE5532

5

67

D5S1A (1N4001)

21

Q3MMBT2907AB

CE

Q4MMBT2907AB

CE

Q2MMBT2222A

B

CE

D2LL4148

21

D3LL41482 1

- +

NO

NO

NC

NC

RY2DPDT

110

8

3

9

2

7

4

- +

NO

NO

NC

NC

RY1DPDT

110

8

3

9

2

7

4

+C6410UF

12

+C6610UF

12

C770.1 uF

12

C780.1 uF

12

C600.1 uF

12

C610.1 uF

12

C740.1 uF

12

C730.1 uF

12 C62

0.1 uF

12

C630.1 uF

12

+

C5147uF 35V

1 2

+

C5047uF 35V

1 2

+

C4947uF 35V

1 2

+

C4847uF 35V

1 2

+

- U25

NE5532

3

2

48

1

+

- U24

NE5532

3

2

48

1

R32330

1 2

R3536 1/8W

1 2

R46499, 1%, 1/16W

1 2

R42487, 1%, 1/16W

1 2

R47499, 1%, 1/16W

1 2

R43487, 1%, 1/16W

1 2R63

453, 1%, 1/16W1 2

R671.24K, 1%, 1/16W

1 2

R62453, 1%, 1/16W

1 2

R661.24K, 1%, 1/16W

1 2

R55475, 1%, 1/16W

1 2

R54475, 1%, 1/16W

1 2

R45499, 1%, 1/16W

1 2

R41487, 1%, 1/16W

1 2

R53475, 1%, 1/16W

1 2

R44499, 1%, 1/16W

1 2

R40487, 1%, 1/16W

1 2

R601.24K, 1%, 1/16W

1 2

R56453, 1%, 1/16W

1 2

R52475, 1%, 1/16W

1 2

R57453, 1%, 1/16W

1 2

R611.24K, 1%, 1/16W

1 2

R2910K

1 2

D4BAS40

1 3

+C921000uF, 16V

12

+C4410UF

12

+C3910UF

12

+C6510UF

12

+C6710UF

12

+C4022UF 16V

12

+C4510UF

12

+C4610UF

12



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II ENGINEAUDIO CHANNEL, MUTING CONTROL

D. O'NEILL

021197 D V4

P82RDV4 9/19/2000

5 5

R50464, 1%, 1/16W

12

R51464, 1%, 1/16W

12

R49464, 1%, 1/16W

12

R48464, 1%, 1/16W

12

R31470

12

R33470

12

R341K

12

R304.7K

12

R7047

1 2

+12V

+12V+VBAT BUVDD

~12V~12V

+12V +5V

AN

A

VCC

VCC VCC

VCC

+12VRESET 1-B4,D5;2-A1;

+12V

MUTE 1-D1,D3

VCC

~12V~12VVCC

CLK25 1-C1,2-A1,3-D8

RESET 1-B4,D5;2-A1;3-D1;4-D6

DACBCLK 2-A8

DACDATA 2-A8

DACL_R 2-A8

DACMUTE 1-C1,C4

+5V

AN

A

DNS

To Coils

IMPORTANT! - PLACE GJ1 AS CLOSE AS POSSIBLE TO U23-14,15

3-D1;4-D6

7-7

7-8

Front Panel and IBBB Board (keyboard models)–FP Buttons and LEDs (page 1 of 2)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J602FP BRIDGE

4COL05COL16COL27COL3

1LEDROW12LEDROW2

8NC

3SWROW

U274HC145

15 A

14 B

13 C

12 D

1021324354657697108119

J604FRONT PANEL

20+5V

12COLA

9COLB

10COLC

11COLD

15DGND1

16DGND2

19DGND3

13DRIVE

17PHASEA

18PHASEB

1ROW0

2ROW1

3ROW2

4ROW3

5ROW4

6ROW5

7ROW6

8ROW7

14SENSE

J601IBBB

5COL4

1LEDROW02LEDROW13SWROW04SWROW1

C40.1uF

12

C30.1uF

12

C20.1uF

12

R26 10K1 2

R25 10K1 2

R23 10K1 2

R24 10K1 2

R22 10K1 2

R21 10K1 2

R20 10K1 2

R18 10K1 2

R19 10K1 2

R17 10K1 2

R1010K

1 2

R1410K

1 2

R1510K

1 2

R1310K

1 2

R1210K

1 2

R1110K

1 2

R910K

1 2 R1610K

1 2

R715

1 2

R115

1 2

R215

1 2

R315

1 2

R415

1 2

R515

1 2

R615

1 2

+C6470uF 6V

12

+C1470uF 6V

12

R81

12

D38RED

12

D5RED

12

D63RED

12

D12RED

12

D11RED

12

D10RED

12

D9RED

12

D16RED

12

D15RED

12

D14RED

12

D24RED

12

D23RED

12

D22RED

12

D21RED

12

D20RED

12

D32RED

12

D37RED

12

D36RED

12

D35RED

12

D34RED

12

D33GREEN

12

D44RED

12

D43RED

12

D42RED

12

D41GREEN

12

D40RED

12

D53RED

12

D52RED

12

D51RED

12

D50RED

12

D49GREEN

12

D48RED

12

D66RED

12

D69RED

12

D68RED

12

D67RED

12

D57RED

12

D60RED

12

D59RED

12

D58RED

12

D56RED

12

D55RED

12

D29RED

12

D28RED

12

D27RED

12

D26RED

12

D4RED

12

D3RED

12

D2RED

12

D1RED

12

Q92SA1271

B

E C

Q102SA1271

B

E C

Q112SA1271

B

E C

Q132SA1271

B

E C

Q142SA1271

B

E C

Q152SA1271

B

E C

Q172SA1271

B

E C

Q162SA1271

B

E C

Q122SA1271

B

E C

Q82SA1271

B

E C

Q12N2222

B

C E

Q22N2222

B

C E

Q32N2222

B

C E

Q42N2222

B

C E

Q72N2222

B

C E

Q52N2222

B

C E

Q62N2222

B

C E

U174HC541

2A[1]3A[2]4A[3]5A[4]6A[5]7A[6]8A[7]9A[8]

1

G1

19

G2

18 B[1]17 B[2]16 B[3]15 B[4]14 B[5]13 B[6]12 B[7]11 B[8]

U374HC373

3 D[1]4 D[2]7 D[3]8 D[4]

13 D[5]14 D[6]17 D[7]18 D[8]

11 G

1 OE

2Q[1]5Q[2]6Q[3]9Q[4]12Q[5]15Q[6]16Q[7]19Q[8]

SP1

SW ROTARY

2COMMON

1PHASEA

3PHASEB

S53TACT

3 2

S54TACT

3 2

S45TACT

3 2

S63TACT

3 2

S64TACT

3 2

S68TACT

3 2

S67TACT

3 2

S70TACT

3 2

S69TACT

3 2

S65TACT

3 2

S66TACT

3 2

S59TACT

3 2

S58TACT

3 2

S61TACT

3 2

S60TACT

3 2

S55TACT

3 2

S56TACT

3 2

S57TACT

3 2

S62TACT

3 2

S52TACT

3 2

S48TACT

3 2

S49TACT

3 2

S50TACT

3 2

S51TACT

3 2

S37TACT

3 2

S32TACT

3 2

S33TACT

3 2

S34TACT

3 2

S35TACT

3 2

S36TACT

3 2

S38TACT

3 2

S39TACT

3 2

S20TACT

3 2

S21TACT

3 2

S22TACT

3 2

S23TACT

3 2

S24TACT

3 2

S25TACT

3 2

S14TACT

3 2

S15TACT

3 2

S16TACT

3 2

S17TACT

3 2

S18TACT

3 2

S19TACT

3 2

S8TACT

3 2

S7TACT

3 2

S12TACT

3 2

S9TACT

3 2

S10TACT

3 2

S11TACT

3 2

S13TACT

3 2

S44TACT

3 2

S40TACT

3 2

S41TACT

3 2

S42TACT

3 2

S43TACT

3 2

S46TACT

3 2

S47TACT

3 2

S5TACT

3 2

S26TACT

3 2

S27TACT

3 2

S28TACT

3 2

S29TACT

3 2

S30TACT

3 2

S31TACT

3 2

S1TACT

3 2

S2TACT

3 2

S3TACT

3 2

S4TACT

3 2

S6TACT

3 2



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC 88 II FRONT PANEL and IBBBFP Buttons and LEDs

DMHDMH

021199-000 B V1

021199B1 11/29/99

1 2

COL0

CO

L0

CO

L1

CO

L2

CO

L3

CO

L4

CO

L5

CO

L6

CO

L7

CO

L8

CO

L9

COL1COL2COL3COL4COL5COL6COL7COL8COL9

VCC

COL0VCC

COL1

COL2

COL3

COL4

COL5

COL6

COL7

COL8

COL9

ROW7ROW6ROW5ROW4ROW3ROW2ROW1ROW0

ROW0ROW1ROW2ROW3ROW4ROW5ROW6 VCC

ROW0ROW1ROW2ROW3ROW4ROW5ROW6ROW7

VCC

Legend

ZPt4

IBBB 1

IBBB 2

Et1

CANCELSPb3SPt3

SPt2

SPb2

ZPt4SPt1

Eb1Et1

SPb3SPt3

SPt2

SPb2

SPt1

321

MPt3

MPt2 MPt1

6

5

4

ZPb3

SS1 SSSt9 SSSt8 SSSb8

SSSt11 SSSt10 SSSb10 SSSb11

SSSb7

SSSb3

SSSb1

GFEEQ

FEEQ

MPt1MPt2

MPt3

SSSt11 SSSt10 SSSb10 SSSb11ZPb3

SS1 SSSt9 SSSt8 SSSb8 SSSb7

CLEAR

column # left to right

Stand Alone Effects LEDsEffects

Midi ParametersSound Parameters

Sound SourceZone Parameters

middle row

top row

bottom row

Sound/Setup/Select

ELED

EMPSPSSZP

1-11mb

tSSS

GREEN

RED

ZPt3

ZONE 2

ZONE 2

GREEN

RED

ZPb2

ZPb1

ZONE 3

ZONE 3

GREEN

RED

SPb1

SSSt6

ZONE 4

ZONE 4

Et3

SS4

SSSt4

SSSt3

SOLO

SSSb5

SSSt2

SSSt7

SSSt1

Eb3

Eb2

G

ENTER

Eb3

Eb2

-

+

Eb1

SSSb9

SSSb6

SSSb4

SSSt7

SSSt1

9

Et3

SS4

SSSt4

SOLO

SSSt3

SPb1

SSSt6

ZONE 4

ZPb2

ZPb1

ZONE 3

ZPt3

>>>

<<<

ZONE 2

0

+/-

SSSb5

SSSt2

GREEN

RED

8

7

Et2

SS3

ZPt2 SS2

SSSt5ZPt1

ZONE 1

Et2

SS3

SSSb9SS2ZPt2

ZPt1 SSSt5 SSSb6

SSSb4

IBBB 2

IBBB 1

ZONE 1

ZONE 1

Front Panel and IBBB Board (keyboard models)–IBBB Buttons and LEDs (page 2 of 2)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J701IBBB

5COL4

1LEDROW02LEDROW13SWROW04SWROW1

D7RED

12

D6RED

12

S72TACT

3 2

S71TACT

3 2



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC 88 II FRONT PANEL and IBBBIBBB Buttons and LEDs

DMHDMH

021199-000 B V1

021199B1 11/29/99

2 2

Eb3

7-9

7-10

Connector Board (keyboard models)–Scanner (page 1 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

TP11

J308WHEELS

1+5VREF

5AGND6NC

4PRESSR

2WHEEL13WHEEL2

RP1310K

12345

678

RP910K

1234 5

678

RP8100

1234 5

678

RP7100

1234 5

678

RP12 10K

1234 5

678

RP10 10K

1234 5

678

RP11 10K

1234 5

678

RP5 100

1234 5

678

RP61001234 5

678

RP1100

1234 5

678

RP4 100

1234 5

678

RP3 100

1234 5

678

RP2100

1234 5

678

J304FRONT PANEL

20+5V

12COLA

9COLB

10COLC

11COLD

15DGND1

16DGND2

19DGND3

13DRIVE

17PHASEA

18PHASEB

1ROW0

2ROW1

3ROW2

4ROW3

5ROW4

6ROW5

7ROW6

8ROW7

14SENSE

L1

FE BEAD

21

L2FE BEAD

1 2

C450.1uF

12

C31000pF

12

C21000pF

12

C11000pF

12

C533pF NPO

12

C433pF NPO

12

C61000pF

12

Y1

12.2880MHz1 2

J306

FATAR_88_TREBLE

18 BR10

3 BR5

7 BR6

11 BR7

15 BR8

19 BR9

20 MK10

1 MK5

5 MK6

9 MK7

13 MK8

17 MK9

2 T0

4 T1

6 T2

8 T3

10 T4

12 T5

14 T6

16 T7

J307

FATAR_88_BASS

3 BR0

7 BR1

11 BR2

15 BR3

19 BR4

1 MK0

5 MK1

9 MK2

13 MK3

17 MK4

20 NC1

18 NC2

2 T0

4 T1

6 T2

8 T3

10 T4

12 T5

14 T6

16 T7

U274HC541

2 A[1]3 A[2]4 A[3]5 A[4]6 A[5]7 A[6]8 A[7]9 A[8]

1

G1

19

G2

18B[1]17B[2]16B[3]15B[4]14B[5]13B[6]12B[7]11B[8]

INT1/

D0/D1/D2/D3/D4/D5/D6/D7/

WE/RD/

WR/

CS/A0/

RDY/INT3/INT2/

E/

A00/A01/A02/A03/A04/A05/A06/A07/

TxD/

PWM/

A08/A09/A10/A11/A12/A13/A14/A15/

EV1/EV2/EV3/

RxD/

/SLD0/SLD1/SLD2/SLD3/SLD4/SLD5/SLD6/SLD7

U1M37451

CPU

21 RD

26 RESET

20 WR

65 AIN[0]

64 AIN[1]

63 AIN[2]

62 AIN[3]

61 AIN[4]

60 AIN[5]

59 AIN[6]

58 AIN[7]

71 AVCC70 AVSS

31 CLKOUT

25 MODE

11 P[50]

10 P[51]

9 P[52]

8 P[53]

7 P[54]

6 P[55]

5 P[56]

4 P[57]

22 R/W

24 RESETOUT

23 SYNC

72 VCC

69 VREFADC68 VREFDAC

32 VSS1

73 VSS2

28 XIN

29 XOUT

67DAC1

66DAC2

57P[00]

56P[01]

55P[02]

54P[03]

53P[04]

52P[05]

51P[06]

50P[07]

49P[10]

48P[11]

47P[12]

46P[13]

45P[14]

44P[15]

43P[16]

42P[17]

40P[20]

39P[21]

38P[22]

37P[23]

36P[24]

35P[25]

34P[26]

33P[27]

3P[30]

2P[31]

79P[32]

78P[33]

77P[34]

76P[35]

75P[36]

74P[37]

19P[60]

18P[61]

17P[62]

16P[63]

15P[64]

14P[65]

13P[66]

12P[67]

C490.1uF

12

R221.5K

12

R2410K

12

R32DNS

12

R34DNS

12

R33DNS

12

R111M

1 2

R1210K

1 2

R110K

1 2

R161M

1 2

R14710K

1 2

R14410K

1 2

R1410K

1 2

R20110

1 2

R210K

1 2

R17110

1 2



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II CONNECTOR PCBScanner

DMH

021221-000 C V4

021221C4 9/29/00

1 3

PWRUPRST 3-A8

RESET 3-B1

INTMIDIRxD 2-B8TOUCHSENS 2-D5 INTMIDITxD 2-B8

IRQ 2-C8

VCC+VBAT

+5Vref 2-A1,C3

EXPDL2 2-B3 MUXA2 2-C5MUXA1 2-C5EXPDL1 2-A3 MUXA0 2-C5

RIBN_SLDR 2-C5 PORT57PORT56

BREATH 2-C3 PORT55 PORT67PORT54 PORT66PORT53 PORT65PORT52 PORT64PORT51

VCC PORT50VCCPORT63

PORT57 VCC PORT62PORT56 PORT61PORT55 PORT60PORT54

VCC

PORT53PORT52PORT51PORT50

PORT67PORT66VCCPORT65PORT64PORT63

MONOSENS 3-D1 PORT62PORT61

FTSW3 2-D8 +5Vref 02 PORT60

FTSW2 2-C8

FTSW1 2-C8 PORT60 VCCPORT61 VCC

IACK 2-B8 PORT62 PORT67PORT63PORT63 PORT66 BASS7PORT62

TOUCH1 2-D5 PORT64 PORT65 BASS6PORT61PORT65 PORT64 BASS5PORT60

TOUCH2 2-D5 PORT66 BASS4PORT67 BASS3

TOUCH3 2-D5 BASS2BASS1BASS0

VCCVCC

BASS7 BASS7 PORT57BASS6 BASS6 PORT56BASS5 BASS5 PORT55BASS4 BASS4 PORT54BASS3BASS2 BASS3 PORT53BASS1 BASS2 PORT52BASS0 BASS1 PORT51

BASS0 PORT50

COMPONENTS TO KEEP NEARCONNECTORSCONNECTOR COMPONENTSJ304 L2, R117, R20, RP6-8J306 RP1-3J307 RP4-5J308 RP11,C1-3

Connector Board (keyboard models)–Digital Interface (page 2 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

L5AES XFRMR

3

1

4

62 5

J303MIDI & CPU

10 +VBAT

5 IACK

4 IRQ

2 CONT

8 DIG_OUT9 GND

6 INT_RxD7 INT_TxD

1 MIDI_RxD

3 MIDI_TxDS1

312

535353 4 14 14 1

IN

222

OUT/THRUOUT

J320MIDI

2522 23 2411 13 14 129 18 20 21 19162 5764 1 3 8 10 15 17

J315JACK

135

24

U6PC910

23

75

6

8

J300

SPDIF OUT

1

23

4

J305SLIDER

1+5VREF

7AGND

2CTRL13CTRL24CTRL35CTRL46VSLDR

U1174HC4051

11 A

10 B

9 C 16VDD

7VEE

8VSS

3Y13 Y014 Y115 Y212 Y3

1 Y45 Y52 Y64 Y7 6G

U7PC41013

5

U574HCU04

98

U574HCU04

34

U574HCU04

1110

U574HCU04

12

U574HCU04

1312

R10710K

13

2

C471000pF

12

C560.1uF

12

C251000pF

12

C221000pF

12

C141000pF

12

C151000pF

12

C161000pF

12

C211000pF

12

C201000pF

12

C191000pF

12

C171000pF

12

C181000pF

12

C120.1uF

12

C130.1uF

12

C111000pF

12

C101000pF

12

C81000pF

12

D16LL4148

12

D5LL4148

12

D3LL4148

12

D13LL4148

12

D4LL4148

12

D1LL4148

12

D2LL4148

12

R1310K

12

R1010K

12

R910K

12

R1063K

12

R556 5%

12

R456 5%

12

R1481K

12

R310K

1 2

R68110

1 2

R6270 5%

1 2

R97110

1 2

R9656

1 2

R73110

1 2

R74110

1 2

R75110

1 2

R10810K

1 2

R10910K

1 2

R101220

1 2

R100220

1 2

R98110

1 2

R95110

1 2

R9356

1 2

R9956

1 2

R10256

1 2

R94110

1 2R69110

1 2

R662.2K

1 2Q1MMBT2907

C

B

E

J314JACK

16

25

34

J313JACK

16

25

34

J317JACK

16

34

J318JACK

16

34

J319JACK

16

34

+

C710uF 16V

1 2

C91000pF1 2

D12S1A

21

D9LL4148

21

D11LL4148

21

D10LL4148

21

D8LL4148

21

D7LL4148

21

D6LL4148

21

R711M

12

R721M

12

R81150

12

R7710K

12

R79680K

12

R78680K

12

R76680K

12 R90

100K

12

R8410K

1 2

R65110

1 2

R8510K

1 2

R8610K

1 2

R64165K 1%

1 2

R631.5M

1 2

R7010K

1 2

R67121.0K 1%

12

R8020K

12

R871K

1 2

R88100K

12

R91100K

12

R89100K

12R821.5K

1 2

R83270

12

Q3

MMBT2907

B

C E

Q18MMBT2222

B

CE

Q2MMBT2222

B

CE

RBN/XYZ

J316

TELMOD6PIN

2REF+

1REF-

6SENSE

5SEC1/X

3SEC2/Y4SEC3

+

-U4LM339

9

814

+

- U4LM339

7

61

+

- U4LM339

5

42

+

- U3TL072

3

21



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II CONNECTOR PCBDigital Interfaces

DMH

021221-000 C V4

021221C4 9/29/00

2 3

+5Vref 1-A1

VCC

VCC

EXPDL1 1-B1

VCC

EXPDL2 1-B1 DIGITAL_OUT

MIDI_RxD

MIDI_TxD

VCC +VBAT

+12V

INTMIDITxD 1-A8

INTMIDIRxD 1-A8

BREATH 1-B1 IACK 1-C1

IRQ 1-A8

+5Vref 1-A1MUXA0 1-B8

MUXA1 1-B8

MUXA2 1-B8

~12V ~12VVCC

VCC

RIBN_SLDR 1-B1

VCCFTSW1 1-C1

+5Vref 1-A1

FTSW2 1-C1TOUCH2 1-C1

TOUCH1 1-C1

TOUCH3 1-C1 FTSW3 1-C1

~12V

TOUCHSENS 1-A1

~12V

THRUOUT

OUT/THRU SELECT

Use either U6 or U7

CONTROLBREATH

FOOTSWITCH "1"

FOOTSWITCH "2"

FOOTSWITCH "3"

LCD Contrast Adjust

SUPERRIBBON

EXPRESSIONPEDAL "2"

EXPRESSIONPEDAL "1"

7-11

7-12

Connector Board (keyboard models)–Power Supply/Audio (page 3 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

+C30

1000uF, 25V

123

+C31

470uF, 25V 12

3

GJ1

JUMPER

21

J321

PC88II PWR

154

23

S2

5 6

32

4

1

D17S1A

12

D15S1A

1 2

D14S1A

12

J302

PC88II AUDIO OUT

2LOUT~

4ROUT+5ROUT~

3AGND

1LOUT+

VR278M12

2

GND

1 IN 3OUT

VR178T05

2

GND

1 IN 3OUT

+

-U4LM339

11

10

312

13

J301

PC88 II POWER

5 +12V

3 -12V2 5V_DIG

6 MUTE

8 PWRUPRST

4 AGND

7 BUVdd

1 DGND

L3FB2.5TSMT

1 2

L4FB2.5TSMT

1 2

U574HCU04

5 6

C410.1uF

12

C420.1uF

12

C240.1uF

12

C230.1uF

12

C480.1uF

12

VR379L12ACM

5

GND

2 I13 I26 I37 I4

1OUT

C330.1uF

12

C320.1uF

12

C261000PF

12

C271000PF

12

C380.1uF

12

C350.1uF

12

C440.1uF

12

C390.22uF

12

C290.1uF

12

C540.1uF

12

C530.1uF

12

C520.1uF

12

C510.1uF

12

C500.1uF

12

C55100pF1 2

C46100pF1 2

C43DNS

1 2

+C36100uF 16V

12

+C37100uF 16V

12

+C401000uF 16V

12

+C34100uF 16V

12

+C28100UF 16V

12

Q15KSC2331

B

C

E

Q14KSC2331

B

C

E

Q7MMBT2222

B

C

E

Q9MMBT2222

B

C

E

+

- U9NE5532

3

2

84

1

+

-U3

TL072

5

6

84

7

D21LL4148

12

D22S1A

12

R1181.6K

12

R195.6K

12

R18470

12

R117470

12

R12215.0K 1%

12

R85.6K

12

R1191M

12 R129

3K

12

R1273K

12

R150100K

12

R14910K

12

R14610K

12

R151DNS

12

R128220

12

R1201K

12

R126220

12

R12315.0K 1%

12

R139200 1% 1/3W

1 2

R141200 1% 1/3W

1 2

R130200 1% 1/3W

1 2R124200 1% 1/3W

1 2

R13315.0K 1%

1 2

R13447

1 2

R14215.0K 1%

12

R13215.0K 1%

1 2

R15100K

12

R12110K

1 2

R13747

1 2

R13815.0K 1%

12

R13515.0K 1%

1 2

R13615.0K 1%

1 2

Q4MMBT2907

C

B

E

Q12MMBT2907

C

B

E

Q13MMBT2907

C

B

E

Q8MMBT2907

C

B

E

J312JACK

16

25

34

J311JACK

16

25

34

J310JACK

16

25

34

R7100K

12

R92DNS

12

R145200K

12

+

- U9NE5532

5

67



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC88 II CONNECTOR PCBPOWER SUPPLY/AUDIO

DMH

021221-000 C V4

021221C4 9/29/00

3 3

+12V+17V

PWRUPRST 1-A8

VCC

+12V

~17V

~12V

+9V VCC~12V

+12V

+9V VCC +9V

VCC +12V

~12V

RESET 1-A1

BUVdd

VCC

+12V

MONOSENS 1-C1

VCC

~12V

~12V

Switch is in ON Position

GJ1 connects directly to C28.2 in a star ground pattern

RIGHT

LEFT/MONO

HEADPHONES

ONE EACH AT GROUND PINS OF U1, U2, U5, U7, U11

Slider Board (keyboard models)–Sliders
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

D81N4148

21

D71N4148

21

D61N4148

21

D51N41482 1

R510K LIN

2

13

R410K LIN

2

13

R310K LIN

2

13

R210K LIN

2

13

R110K LIN

2

13

J102FP BRIDGE

4COL0 5COL1 6COL2 7COL3

1LEDROW12LEDROW2

8NC

3SWROW

J101SLIDER

1+5VREF

7AGND

2CTRL1 3CTRL2 4CTRL3 5CTRL4 6VSLDR

S4TACT

3 2S3

TACT

3 2S2

TACT

3 2S1

TACT

3 2

D4DUAL COLOR

2

31

D3DUAL COLOR

2

31

D2DUAL COLOR

2

31

D1DUAL COLOR

2

31



Filename:

Doc:Mfg::

ShtBy:

ofRev:

PC88 II SLIDER PCBSliders See Table Buttons

DMH

A V1

121198B1 10/26/99

: 1 1

+5V

ref

VOLUMESLIDER AUPUP

SLIDER BUP

SLIDER CUP

SLIDER D

GREEN

RED

ZONE 4

ZONE 4

ZONE 3

ZONE 3

ZONE 2

ZONE 2

ZONE 1

ZONE 1

Date:Eng:

7-13

7-14

Right Front Panel Board (rack models)–FP Buttons and LEDs (page 1 of 2)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

S14

3 124

S13

3 124

S12

3 124

S11

3 124

S10

3 124

S9

3 124

S8

3 124

S7

3 124

S6

3 124

S5

3 124

S4

3 124

S3

3 124

S2

3 124

S1

3 124

+C1470uF 6V

123

+C2470uF 6V

123

R110K

13

2

J602Front Panel Bridge

1 COL1

2 COL2

3 COL3

4 COL6

5 COL7

6 COL9

9 CTRL1

10 CTRL2

11 CTRL3

12 CTRL4

15 DGND

8 DROW07 DROW1

16 RDRPWR

14 SROW013 SROW1

J601FRONT PANEL

17+5V

10COLA

7COLB

8COLC

9COLD

26CONTHI

24CONTLO

22CTRL121CTRL220CTRL319CTRL4

13DGND1

16DGND2

18DGND3

23DGND4

11DRIVE

14PHASEA

15PHASEB

1ROW0

2ROW1

3ROW2

4ROW5

5ROW6

6ROW7

12SENSE

25WPR

D9DUAL COLOR

2

31

U174HC145

15 A

14 B

13 C

12 D

1021324354657697108119

C40.1uF 50V 20%

12

C60.1uF 50V 20%

12

C50.1uF 50V 20%

12

R1210K

1 2

R1110K

1 2

R8 10K1 2

R7 10K1 2

R1015

1 2

R915

1 2

R1610K

1 2

R1510K

1 2

R1410K

1 2

R1310K

1 2

R6 10K1 2

R4 10K1 2

R5 10K1 2

R3 10K1 2

+C100.1uF 50V 20%

12

+C90.1uF 50V 20%

12

+C80.1uF 50V 20%

12

+C30.1uF 50V 20%

12

R21

12

D1RED

12

D7RED

12

D3RED

12

D5RED

12

D8RED

12

D4RED

12

D6RED

12

D2RED

12

Q8MMBT2907

B

E C

Q6MMBT2907

B

E C

Q7MMBT2907

B

E C

Q3MMBT2907

B

E C

Q4MMBT2907

B

E C

Q5MMBT2907

B

E C

Q2MMBT2222A

B

C E

Q1MMBT2222A

B

C E

U374HC541

2A[1]3A[2]4A[3]5A[4]6A[5]7A[6]8A[7]9A[8]

1

G1

19

G2

18 B[1]17 B[2]16 B[3]15 B[4]14 B[5]13 B[6]12 B[7]11 B[8]

U274HC373

3 D[1]4 D[2]7 D[3]8 D[4]

13 D[5]14 D[6]17 D[7]18 D[8]

11 G

1 OE

2Q[1]5Q[2]6Q[3]9Q[4]12Q[5]15Q[6]16Q[7]19Q[8]

SP1

SW ROTARY

2COMMON

1PHASEA

3PHASEB



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

RIGHT PC2 RACK FRONT PANELFP Buttons and LEDs

DODAON

021251-000 C v1

021251C1 12/20/2000

1 2

CO

L1

CO

L2

CO

L3

CO

L6

CO

L7

CO

L9

COL1COL2COL3

COL6COL7

VCCCOL9

ROWDRVPWR

VCC

COL1

COL2

COL3

CNTRLR4COL6 CNTRLR3

CNTRLR2COL7 CNTRLR1

COL9

ROWDRVPWR

CNTRLR1CNTRLR2CNTRLR3 ROW0

CNTRLR4 ROW1ROW2ROW5

VCC

ROW0ROW1ROW2ROW7 ROW5

ROW6 ROW6ROW5 ROW7ROW2ROW1ROW0

VCC

Note: From RevB to RevC, no schematic changes made.

SOLO

SHIFTZONE 2ZONE 1ZONE 4ZONE 3

FRONT PANEL RIGHT

FRONT PANEL RIGHT

MIDI RCV

FX

GLOBAL

KB3

MIDI SETUPS

INT VOX

COPY

COMPARE

EDIT

MIDI RCV

ENTER

CANCEL

FX

GLOBAL

COMPARE

COPYINT VOX

MIDI SET

KB3

EDIT

MENU>>>

<<<

Left Front Panel Board (rack models)–Controllers, FP Buttons and LEDs (page 2 of 2)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J604

Front Panel Bridge 22 +5vref1 AVSS

S20

312 4

S19

312 4

S18

312 4

S17

312 4

S16

312 4

S15

312 4

J603Front Panel Bridge

1COL1

2COL2

3COL3

4COL6

5COL7

6COL9

9CTRL1

10CTRL2

11CTRL3

12CTRL4

15DGND

8DROW07DROW1

16RDRPWR

14SROW013SROW1

D16LL4148

21

D18LL4148

21

D14LL4148

21

D12LL4148

21

R2110K LIN2

13

R2210K LIN2

13

R2010K LIN2

13

R1910K LIN2

13

D11DUAL COLOR

2

31

D19DUAL COLOR

2

31

D17DUAL COLOR

2

31

D15DUAL COLOR

2

31

D13DUAL COLOR

2

31

R1715

1 2

R1815

1 2

+C7

0.1uF 50V 20%

12

D10RED

12

Q10MMBT2222A

B

C E

Q9MMBT2222A

B

C E



Filename:

Doc:

Eng:ShtBy:

ofRev:

LEFT PC2 RACK FRONT PANELControllers, FP Buttons and LEDs

DAONDAON

021261-001 C v1

021251C1 12/20/2000

2 2


Mfg:

Date:

ROWDRIVERPOWER

POT APOT BPOT C

CW CW CW

POT D

CW

ZONE 2ZONE 1ZONE 4

SHIFTZONE 2ZONE 1ZONE 4ZONE 3SOLO

SOLO

SHIFTZONE 3

7-15

7-16

Connector Board (rack models)–Scanner (page 1 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J304FRONT PANEL

17+5V

10COLA

7COLB

8COLC

9COLD

26CONTHI

24CONTLO

22CTRL121CTRL220CTRL319CTRL4

13DGND1

16DGND2

18DGND3

23DGND4

11DRIVE

14PHASEA

15PHASEB

1ROW0

2ROW1

3ROW2

4ROW5

5ROW6

6ROW7

12SENSE

25WPR

U1174HC4051

11 A

10 B

9 C 16VDD

7VEE

8VSS

3Y13 Y014 Y115 Y212 Y3

1 Y45 Y52 Y64 Y7 6G

TP31TP21

TP11

RP910K

1234 5

678

RP11 10K

1234 5

678

RP10 10K

1234 5

678

RP12 10K

1234 5

678

RP61001234 5

678

RP8100

1234 5

678

RP7100

1234 5

678

L1F

B2.

5TS

MT

12

L2FB2.5TSMT

1 2

C450.1uF

12

C533pF NPO

12

C433pF NPO

12

Y1

12.2880MHz1 2

INT1/

D0/D1/D2/D3/D4/D5/D6/D7/

WE/RD/

WR/

CS/A0/

RDY/INT3/INT2/

E/

A00/A01/A02/A03/A04/A05/A06/A07/

TxD/

PWM/

A08/A09/A10/A11/A12/A13/A14/A15/

EV1/EV2/EV3/

RxD/

/SLD0/SLD1/SLD2/SLD3/SLD4/SLD5/SLD6/SLD7

U1M37451

CPU

21 RD

26 RESET

20 WR

65 AIN[0]

64 AIN[1]

63 AIN[2]

62 AIN[3]

61 AIN[4]

60 AIN[5]

59 AIN[6]

58 AIN[7]

71 AVCC70 AVSS

31 CLKOUT

25 MODE

11 P[50]

10 P[51]

9 P[52]

8 P[53]

7 P[54]

6 P[55]

5 P[56]

4 P[57]

22 R/W

24 RESETOUT

23 SYNC

72 VCC

69 VREFADC68 VREFDAC

32 VSS1

73 VSS2

28 XIN

29 XOUT

67DAC1

66DAC2

57P[00]

56P[01]

55P[02]

54P[03]

53P[04]

52P[05]

51P[06]

50P[07]

49P[10]

48P[11]

47P[12]

46P[13]

45P[14]

44P[15]

43P[16]

42P[17]

40P[20]

39P[21]

38P[22]

37P[23]

36P[24]

35P[25]

34P[26]

33P[27]

3P[30]

2P[31]

79P[32]

78P[33]

77P[34]

76P[35]

75P[36]

74P[37]

19P[60]

18P[61]

17P[62]

16P[63]

15P[64]

14P[65]

13P[66]

12P[67]

C30.1uF

12

C10.1uF

12

C20.1uF

12

C490.1uF

12

R1481K

1 2

R2410K

12

R32DNS

12

R34DNS

12

R33DNS

12

R221.5K

12

R111M

1 2

R10810K

1 2

R10910K

1 2

R20110

1 2

R310K

1 2

R110K

1 2

R210K

1 2

R1210K

1 2

R14710K

1 2

R14410K

1 2

R1410K

1 2

R161M

1 2

R17110

1 2

Q18MMBT2222

B

CE



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC2 Rack Connector PCBScanner

D. O'Neill

021250-000 B V3

021250B3 9/29/2000

1 3

+VBAT

RESET 3-C1 PWRUPRST 3-A8

INTMIDIRxD 2-C7

INTMIDITxD 2-C7

IRQ 2-C7

VCC

VCC

UNUSED

RIBN_SLDR

PORT57PORT56PORT55PORT54PORT53 VCCPORT52PORT51

VCC PORT50VCC

RIBN_SLDRPORT57 VCCPORT56PORT55PORT54

VOLUME 3-A3

VCCPORT27PORT26

PORT53 PORT25PORT52 PORT24PORT51 UNUSEDPORT23PORT50 PORT22

VCCVCC

PORT64PORT64 PORT63

VCC VCC PORT63 PORT62PORT62 PORT61PORT61

+5Vref 3-A3

+12V

CONTRAST 2-C6

~12V

PORT26PORT27

PORT22PORT25PORT24PORT23

BASS7BASS7 PORT57BASS6 BASS6 PORT56BASS5 BASS5 PORT55

BASS2BASS1BASS0 PORT64 2-C7

BASS2 PORT52BASS1 PORT51BASS0 PORT50

COMPONENTS TO KEEP NEAR CONNECTORSCONNECTOR COMPONENTSJ304 L2, R117, R20, RP6-8

Connector Board (rack models)–Digital Interface (page 2 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

IN OUT

45 3 2 145 3 2 145 3 2 1

OUT/THRU

J320MIDI

5 7 6 42 16 182021199 11131412 242322 25

L5AES XFRMR

3

1

4

62 5

J303MIDI & CPU

10 +VBAT

5 IACK

4 IRQ

2 CONT

8 DIG_OUT9 GND

6 INT_RxD7 INT_TxD

1 MIDI_RxD

3 MIDI_TxD

S1312

U6PC910

23

75

6

8

J300

SPDIF OUT

1

2

3

4U7PC41013 5

U574HCU04

98

U574HCU04

34

U574HCU04

1110

U574HCU04

12

U574HCU04

1312

C471000pF

12

C560.1uF

12

C251000pF

12

C221000pF

12

C211000pF

12

C201000pF

12

C191000pF

12

C171000pF

12

C181000pF

12

D13LL4148

12

R1063K

12

R556 5%

12

R456 5%

12

R6270 5%

1 2

R97110

1 2

R9656

1 2

R101220

1 2

R100220

1 2

R98110

1 2

R95110

1 2

R9356

1 2

R9956

1 2

R10256

1 2

R94110

1 2



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC2 Rack Connector PCBDigital Interfaces

D. O'Neill

021250-000 B V3

021250B3 9/29/2000

2 3

VCC

VCC

VCC

DIGITAL_OUT

MIDI_RxD

MIDI_TxD

VCC+VBAT

INTMIDITxD 1-A8

INTMIDIRxD 1-A8

PORT64 1-D6

CONTRAST 1-C8 IRQ 1-A8

OUT

THRU

OUT/THRU SELECT

Use either U6 or U7

7-17

7-18

Connector Board (rack models)–Power Supply/Audio (page 3 of 3)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

AGNDRIGHTLEFT

J322

PC2R FRONT PANEL VOL/PWR/HPhones

5 +5Vref

1 14VAC2 14VACSW3 9VDC4 9VDCSW

10

7 DGND89

6 WPR

- +

NO

NO

NC

NC

RY1DPDT

110

8

3

9

2

7

4

+C30

1000uF, 25V

123

+C31

470uF, 25V 12

3

GJ1

JUMPER

21

J321

PC88II PWR

154

23

D17S1A

12

D14S1A

12

D15S1A

1 2

J302

PC88II AUDIO OUT

2LOUT~

4ROUT+5ROUT~

3AGND

1LOUT+

VR178T05

2

GND

1 IN 3OUT

VR278M12

2

GND

1 IN 3OUTJ301

PC88 II POWER

5 +12V

3 -12V2 5V_DIG

6 MUTE

8 PWRUPRST

4 AGND

7 BUVdd

1 DGND

L3FB2.5TSMT

1 2

L4FB2.5TSMT

1 2

U574HCU04

5 6

C410.1uF

12

C420.1uF

12

VR379L12ACM

5

GND

2 I13 I26 I37 I4

1OUT

C540.1uF

12

C530.1uF

12

C520.1uF

12

C510.1uF

12

C500.1uF

12

C350.1uF

12

C290.1uF

12

C261000PF

12

C271000PF

12

C390.22uF

12

C330.1uF

12

C320.1uF

12

C380.1uF

12

C440.1uF

12

C55100pF1 2

C46100pF1 2

+C28100uF 16V

12

+C34100uF 16V

12

+C401000uF 16V

12

+C36100uF 16V

12

+C37100uF 16V

12

Q7MMBT2222

B

C

E Q15KSC2331

B

C

E

Q14KSC2331

B

C

E

Q9MMBT2222

B

C

E

+

- U9NE5532

3

2

84

1

D21LL4148

12

D22S1A

12

R1181.6K

12

R195.6K

12

R18470

12

R117470

12

R85.6K

12

R1191M

12

R12215.0K 1%

12

R1293K

12

R1273K

12

R128220

12

R1201K

12

R126220

12

R12315.0K 1%

12

R130200 1% 1/3W

1 2 R124200 1% 1/3W

1 2

R139200 1% 1/3W

1 2

R141200 1% 1/3W

1 2

R13315.0K 1%

1 2

R13447

1 2

R14215.0K 1%

12

R13215.0K 1%

1 2

R15100K

12

R12110K

1 2

R13747

1 2

R13815.0K 1%

12

R13515.0K 1%

1 2

R13615.0K 1%

1 2

Q4MMBT2907

C

B

E

Q12MMBT2907

C

B

E

Q13MMBT2907

C

B

E

Q8MMBT2907

C

B

E

J312JACK

16

25

34

J311JACK

16

25

34

+

- U9NE5532

5

67



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC2 Rack Connector PCBPOWER SUPPLY/AUDIO

D. O'Neill

021250-000 B V3

021250B3 9/29/2000

3 3

+12V+17V

PWRUPRST 1-A8

VCC

+12V

~17V

~12VVCC

~12V+5Vref 1-C5VOLUME 1-B7

HPLEFTHPRIGHT

+12V

+9V VCC

+12V

BUVdd

+9V VCC +9V

~12V

VCC

HPLEFT HPLEFT

HPRIGHT HPRIGHT

RESET 1-A1

VCC

Note on signal polarity; Line out TIP, Headphone out and Digital out = positive going signal. The Digital out is inverted with respect to the output of the DAC

ONE EACH AT GROUND PINS OF U1, U2, U5, U7, U11

RING = -

RING = -

TIP = +

TIP = +RIGHT

LEFT/MONO

LEFT/MONO

Power/Volume/Headphone Board (rack models)
1 2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

A

B

C

D

A

B

C

D

J3

Front Panel Bridge 22 +5vref1 AVSS

VR1Power sw / Volume control

1

45

3

67

2

AGNDRIGHTLEFT

J2

PC2R FRONT PANEL VOL/PWR/HPhones

5 +5Vref

1 14VAC2 14VACSW3 9VDC4 9VDCSW

10

7 DGND89

6 WPR

J1Headphone

19

873

245

6



Filename:

Doc:Mfg:Eng:

ShtBy:Date:

ofRev:

PC2RPower / Volume / Headphone PCB

Fran Turner

021262 BV1

121262B1 12/7/2000

1 1

Do not connect these pins

7-19

7-20



AAlpha Wheel Test

scanner tests, PC2 5-8scanner tests, PC2R 5-7

Assembly instructions, 76-note Keyboard Assemblyconnecting the keyboard 4-21contact boards 4-24replacing contact strips 4-25replacing keys 4-24replacing the keyboard 4-20

Assembly instructions, 88-note Keyboard Assemblycontact boards 4-30, 4-31removing a key weight 4-33replacing contact strips 4-32replacing keys 4-30replacing the keyboard 4-27

Assembly instructions, keyboard modelsbottom enclosure 4-6Connector Board 4-10Enclosure Support Walls 4-8Engine Board 4-17Front Panel Board 4-12LCD Board 4-13Mod Wheel Assembly 4-18Polyphony Expansion Board (PCX-1) 4-14Slider Board 4-15top enclosure 4-6

Assembly instructions, rack modelsConnector Board 3-4Engine Board 3-6Headphone/Volume/Power Switch Board 3-14LCD Board 3-12Left Front Panel Board 3-13Polyphony Expansion Board (PCX-1) 3-5removing the front panel faceplate 3-9replacing the front panel faceplate 3-8Right Front Panel Board 3-11Top Cover 3-2

BBattery

removing, PC2 5-5removing, PC2R 5-6replacing, PC2 5-5replacing, PC2R 5-6

Boot Blockentering 5-2installing 5-4

Boot blockinstalling the Sound ROM Option 5-4

Bottom Enclosureclosing, keyboard models 4-6diagram 76-note keyboard 4-2, 4-19diagram 88-note keyboard 4-3, 4-26opening, 76-note keyboard 4-2opening, 88-note keyboard 4-3

Burn-in Testsdiagnostics 2-3

Button Testscanner tests, PC2 5-8scanner tests, PC2R 5-7

CCables, keyboard models

Connector Board 4-8Engine Board 4-16Front Panel Board 4-11

Cables, rack modelsConnector Board 3-3Engine Board 3-6

Connector Boardcables, keyboard models 4-8cables, rack models 3-3diagram, hardware 4-9parts list, keyboard models 6-6parts list, rack models 6-13removing, keyboard models 4-8removing, rack models 3-3replacing, keyboard models 4-10replacing, rack models 3-4

Contact Boardsremoving, 76-note keyboard models 4-24removing, 88-note keyboard models 4-30replacing, 76-note keyboard models 4-24replacing, 88-note keyboard models 4-30, 4-31

Contactstroubleshooting 5-12

DDiagnostic Test Modes: description 2-2Diagnostic Tests

LED 2-5LISA 2-4MABEL 2-4MIDI 2-5PCX-1 MABEL 2-6PCX-1 RAM 2-5PCX-1 ROM 2-5PCX-1 RW 2-5PCX-1 SROM 2-6RAM 2-4Read-write 2-4ROM 2-4Sound ROM 2-4ZRAM 2-5

DiagnosticsBurn-in Tests 2-3entering tests 2-2list of tests 2-1test results 2-3

Diagram, keyboard modelsbottom enclosure 76-note keyboard 4-2, 4-19bottom enclosure 88-note keyboard 4-3, 4-26Connector Board hardware 4-9Engine Board 4-16Front Panel Board 4-11front panel layout 1-3, 1-4, 1-5Interconnect 5-14key spring, 76-note keyboard 4-23key spring, 88-note keyboard 4-29key weights 88-note keyboard models 4-32rear panel 1-2, 4-4Slider Board 4-14

i


top cover and bottom enclosure 4-5top enclosure, board locations 4-7top enclosure, enclosure support wall locations 4-7

Diagram, rack modelsfront panel 1-6, 1-7, 1-8front panel assembly 3-8front panel faceplate 3-10Headphone/Vol/Pwr Sw Board connection 3-13Interconnect 5-13rear panel 1-6removing the Polyphony Expansion Board (PCX-1) 3-5removing the top cover 3-2

Disassembly instructions, 76-note Keyboard Assemblycontact boards 4-24disconnecting the keyboard 4-21removing contact strips 4-25removing keys 4-22removing the keyboard 4-19

Disassembly instructions, 88-note Keyboard Assemblycontact boards 4-30removing a key weight 4-32removing contact strips 4-31removing keys 4-27removing the keyboard 4-26

Disassembly instructions, keyboard modelsbottom enclosure 76-note keyboard 4-2bottom enclosure 88-note keyboard 4-3Connector Board 4-8Enclosure Support Walls 4-8Engine Board 4-15Front Panel Board 4-10LCD Board 4-13Mod Wheel Assembly 4-17Polyphony Expansion Board (PCX-1) 4-13Slider Board 4-14top enclosure 4-4

Disassembly instructions, rack modelsConnector Board 3-3Engine Board 3-6Headphone/Volume/Power Switch Board 3-14LCD Board 3-11Left Front Panel Board 3-12Polyphony Expansion Board (PCX-1) 3-5removing the front panel assembly 3-8removing the front panel faceplate 3-9Right Front Panel Board 3-10Top Cover 3-2

EEnclosure Support Walls

removing, keyboard models 4-8replacing, keyboard models 4-8

Engine Boardcables, keyboard models 4-16cables, rack models 3-6diagram, keyboard models 4-16parts list 6-3removing, keyboard models 4-15removing, rack models 3-6replacing, keyboard models 4-17replacing, rack models 3-6

Entering Diagnostic Tests 2-2

FFinal Assembly

parts list, 76-note keyboard models 6-9parts list, 88-note keyboard models 6-11parts list, rack models 6-16

Front Paneldiagram, keyboard models 1-3, 1-4, 1-5diagram, rack models 1-6, 1-7, 1-8features, keyboard models 1-3features, rack models 1-7

Front Panel Assembly, rack modelsdescription, front panel boards 3-9diagram 3-8diagram, front panel faceplate 3-10diagram, Headphone/Vol/Pwr Sw Board connection 3-13parts list 6-14removing the front panel assembly 3-8removing the front panel faceplate 3-9replacing the front panel assembly 3-8replacing the front panel faceplate 3-9

Front Panel Boardcables, keyboard models 4-11diagram, keyboard models 4-11parts list 6-5removing, keyboard models 4-10replacing, keyboard models 4-12

Front Panel Knobs Testscanner tests, PC2R 5-7

HHeadphone & Power Switch Assembly

parts list 6-15Headphone/Volume/Power Switch Board

removing, rack models 3-14replacing, rack models 3-14

KKeyboard

Dead 5-12Dead Note(s) 5-12noise 5-12scanner testsPC2 5-9

Keyboard Assemblyparts list, 76-note keyboard models 6-10parts list, 88-note keyboard models 6-12

Keyboard Assembly, 76-note keyboard modelsconnecting the keyboard 4-21contact boards 4-24disconnecting the keyboard 4-21key spring, diagram 4-23natural/white keys description 4-23removing contact strips 4-25removing keys 4-22removing the keyboard 4-19replacing contact strips 4-25replacing keys 4-24replacing the keyboard 4-20sharp/black keys description 4-23

Keyboard Assembly, 88-note keyboard modelscontact boards 4-30, 4-31

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diagram, key weights 4-32key spring, diagram 4-29natural/white keys description 4-28removing a key weight 4-32removing contact strips 4-31removing keys 4-27removing the keyboard 4-26replacing a key weight 4-33replacing contact strips 4-32replacing keys 4-30replacing the keyboard 4-27sharp/black keys description 4-29

LLCD Board

parts list, keyboard models 6-8parts list, rack models 6-15removing, keyboard models 4-13removing, rack models 3-11replacing, keyboard models 4-13replacing, rack models 3-12

LED: diagnostic test 2-5Left Front Panel Board

parts list 6-14removing, rack models 3-12replacing, rack models 3-13

LISA: diagnostic test 2-4

MMABEL: diagnostic test 2-4MIDI: diagnostic test 2-5Mod Wheel

scanner tests, PC2 5-9Mod Wheel Assembly

parts list 6-8removing, keyboard models 4-17replacing, keyboard models 4-18

PPCX-1 MABEL: diagnostic test 2-6PCX-1 RAM: diagnostic test 2-5PCX-1 ROM: diagnostic test 2-5PCX-1 RW: diagnostic test 2-5PCX-1 SROM: diagnostic test 2-6Pedals

continuous, scanner tests, PC2 5-9switch, scanner tests, PC2 5-9

Polyphony Expansion Board (PCX-1)diagram 3-5removing, keyboard models 4-13removing, rack models 3-5replacing, keyboard models 4-14replacing, rack models 3-5

RRAM: diagnostic test 2-4Read-write: diagnostic test 2-4Rear Panel

diagram, keyboard models 1-2, 4-4diagram, rack models 1-6features, keyboard models 1-2features, rack models 1-6

ResetsHard Reset 5-2Soft Reset 5-2

Right Front Panel Boardparts list 6-15removing, rack models 3-10replacing, rack models 3-11

ROM: diagnostic test 2-4

SScanner Tests, PC2

Alpha Wheel 5-8Buttons 5-8Front Panel Sliders 5-8Keyboard 5-9Mod Wheels 5-9Pedals, continuous 5-9Pedals, switch 5-9

Scanner Tests, PC2RAlpha Wheel 5-7Buttons 5-7Front Panel Knobs 5-7

Slider Boarddiagram, keyboard models 4-14parts list 6-9removing, keyboard models 4-14replacing, keyboard models 4-15

Slider Testscanner tests, PC2 5-8

Software Updatesfile formats 5-3installing 5-3

Sound ROM: diagnostic test 2-4

TTop Cover

removing, rack models 3-2replacing, rack models 3-2

Top Enclosure, keyboard modelsdescription 4-7diagram, board locations 4-7diagram, enclosure support wall locations 4-7removing 4-4replacing 4-6

TroubleshootingAudio Problems 5-10Front Panel Problems 5-11Keyboard Problems 5-12Power Problems 5-10

UUser data

saving 5-1

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YYoung Chang Distributors iii

ZZRAM: diagnostic test 2-5

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