sony hcd-gtx88

1Ver. 1.0 2007. 06

Model Name Using Similar Mechanism NEWCD

CD Mechanism Type CDM74KF-K6BD91UR-WOD//MSection

Optical Pick-up Name KSM-213DCP/C2NPTape Deck Model Name Using Similar Machanism HCD-GN1100DSection

SERVICE MANUAL E ModelAustralian Model

HCD-GTX88

Amplifier sectionBrazil model onlyThe following are measured at

AC 127 V or 220 V, 50/60 Hz

Front/Surround speakerRMS output power: 205 W + 205 W

(at 8 , 1 kHz, 10% THD)SubwooferRMS output power: 130 W + 130 W

(at 6 , 100 Hz, 10% THD)

Other modelsThe following are measured atMexican model: AC 127 V, 60 HzOther models: AC 120, 220, 240 V, 50/60 Hz

Front/Surround speakerPower Output (rated): 175 W + 175 W

(at 8 , 1 kHz, 1% THD)RMS output power (reference):

255 W + 255 W(per channel at 8 , 1 kHz,10% THD)

SubwooferRMS output power (reference):

130 W + 130 W(at 6 , 100 Hz, 10% THD)

SPECIFICATIONSInputsVIDEO (AUDIO IN) L/R:

Voltage 250 mV,impedance 47 kilohms

AUDIO (AUDIO IN) L/R:Voltage 450 mV,impedance 47 kilohms

MIC: Sensitivity 1 mV,impedance 10 kilohms

(USB) port: Type AOutputsPHONES: accepts headphones of

8 ohms or more

Disc player sectionSystem Compact disc and digital

audio systemLaser Semiconductor laser

(=770 810 nm)Emission duration:continuous

Laser Output Max. 44.6 W** This output is the value measured at a distance of 200 mm from the objective lens surface on the Optical Pick-up Block with 7 mm aperture.

Sony CorporationPersonal Audio DivisionPublished by Sony Techno Create Corporation

9-887-753-012007F04-1 2007. 06

Continued on next page

CD DECK RECEIVER

HCD-GTX88 is the tuner, deck,CD and amplifier section inMHC-GTX88.

2HCD-GTX88

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINEWITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND INTHE PARTS LIST ARE CRITICAL TO SAFE OPERATION.REPLACE THESE COMPONENTS WITH SONY PARTS WHOSEPART NUMBERS APPEAR AS SHOWN IN THIS MANUAL ORIN SUPPLEMENTS PUBLISHED BY SONY.

Frequency response 20 Hz 20 kHzWave length 770 810 nmSignal-to-noise ratio More than 90 dBDynamic range More than 88 dB

Tape deck sectionRecording system 4-track 2-channel stereoFrequency response 50 13,000 Hz (3 dB),

using Sony TYPE I tape

Tuner sectionFM stereo, FM/AM superheterodyne tuner

FM tuner sectionTuning rangeBrazil model: 87.5 108.0 MHz

(100 kHz step)Other models: 87.5 108.0 MHz

(50 kHz step)Antenna FM lead antennaAntenna terminals 75 ohm unbalancedIntermediate frequency 10.7 MHz

AM tuner sectionTuning rangeLatin American and Oceanian models:

530 1,710 kHz (with theinterval set at 10 kHz)531 1,710 kHz (with theinterval set at 9 kHz)

Other models: 531 1,602 kHz (with theinterval set at 9 kHz)530 1,610 kHz (with theinterval set at 10 kHz)

Antenna AM loop antennaAntenna terminals External antenna terminalIntermediate frequency 450 kHz

USB sectionSupported bit rate MP3 (MPEG 1 Audio Layer 3):

32 320 kbps, VBRSampling frequencies MP3 (MPEG 1 Audio Layer 3):

32/44.1/48 kHzTransfer speed Full-SpeedSupported USB device Mass Storage ClassMaximum current 500 mA

GeneralPower requirementsMexican model: 127 V AC, 60 HzBrazil model: 127 V or 220 V AC, 50/60 Hz,

Adjustable with voltageselector

Oceanian model: 230 240 V AC, 50/60 HzArgentina model: 220 V AC, 50/60 HzOther models: 120 V, 220 V or 230 240 V AC,

50/60 Hz, adjustable withvoltage selector

Power consumption 430 W

Dimensions (w/h/d) (Approx.)281 361 417 mm

Mass (Approx.) 14.2 kg

Design and specifications are subject to change withoutnotice.

3CAUTIONUse of controls or adjustments or performance of proceduresother than those specified herein may result in hazardousradiation exposure.

HCD-GTX88

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCKOR BASE UNIT

The laser diode in the optical pick-up block may suffer electrostaticbreakdown because of the potential difference generated by thecharged electrostatic load, etc. on clothing and the human body.During repair, pay attention to electrostatic break-down and alsouse the procedure in the printed matter which is included in therepair parts.The flexible board is easily damaged and should be handled withcare.

Notes on Chip Component Replacement Never reuse a disconnected chip component. Notice that the minus side of a tantalum capacitor may be

damaged by heat.

Flexible Circuit Board Repairing Keep the temperature of soldering iron around 270C during

repairing. Do not touch the soldering iron on the same conductor of the

circuit board (within 3 times). Be careful not to apply force on the conductor when soldering

or unsoldering.

UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher than

ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set to about350 C.Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful! Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow) thanordinary solder so use caution not to let solder bridges occur suchas on IC pins, etc.

Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder may alsobe added to ordinary solder.

This appliance isclaassified as a CLASS 1LASER product. Thislabel is located on therear exterior.

NOTES ON LASER DIODE EMISSION CHECKThe laser beam on this model is concentrated so as to be focused onthe disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emission,observe from more than 30 cm away from the objective lens.

Laser component in this product is capableof emitting radiation exceeding the limit forClass 1.

4HCD-GTX88

MODEL IDENTIFICATION

MODEL NUMBER LABEL

MODEL PARTS No.GTX88: E2 3-113-126-0sGTX88: E51 3-198-009-0sGTX88: AUS 3-197-997-0sGTX88: AR 3-198-001-0s

AbbreviationE2 : 120V AC area in E modelE51 : Chilean and Peruvian modelAR : Argentina modelAUS : Australian modelPART No.

5TABLE OF CONTENTS

HCD-GTX88

1. GENERALGuide to parts and controls ...................................................... 6

2. DISASSEMBLY2-1. Case (Top) ......................................................................... 132-2. Loading Panel .................................................................... 132-3. Tuner Pack ......................................................................... 142-4. CD Block Section .............................................................. 142-5. Front Panel Section ........................................................... 152-6. Tape Mechanism Deck, Mic Board, USB Connector Board ....................................................... 152-7. Panel Board, Function Board, Jog Board .......................... 162-8. CD-SW Board ................................................................... 162-9. Cover (CDM) .................................................................... 172-10. Back Panel Section ............................................................ 172-11. Power Board Section ......................................................... 182-12. Main Board ....................................................................... 182-13. Subwoofer Board, Power Board ........................................ 192-14. Power Transformer (T1200) .............................................. 192-15. BD91 Board ...................................................................... 202-16. Driver Board, SW Board, USB Board .............................. 202-17. Optical Pick-up ................................................................. 212-18. Sensor Board ..................................................................... 212-19. Motor (TB) Board ............................................................. 222-20. Motor (LD) Board ............................................................. 22

3. TEST MODE ..................................................................... 23

4. MECHANICAL ADJUSTMENTS ............................... 27

5. ELECTRICAL ADJUSTMENTS ................................. 28

6. DIAGRAMS6-1. Block Diagram RF/Servo Section ........................... 316-2. Block Diagram Tape/Tuner Section ........................ 326-3. Block Diagram Main Section .................................. 336-4. Block Diagram USB Section .................................. 346-5. Block Diagram AMP/Subwoofer Section ............... 356-6. Block Diagram Display/Power Section .................. 36

6-7. Circuit Boards Location .................................................... 376-8. Printed Wiring Board BD91 Section ....................... 406-9. Schematic Diagram BD91 Section .......................... 416-10. Printed Wiring Boards Driver Section ..................... 426-11. Schematic Diagram Driver Section ......................... 436-12. Schematic Diagram Main Section (1/4) .................. 446-13. Schematic Diagram Main Section (2/4) .................. 456-14. Schematic Diagram Main Section (3/4) .................. 466-15. Schematic Diagram Main Section (4/4) .................. 476-16. Printed Wiring Board Main Section ........................ 486-17. Printed Wiring Board USB Connector Section ....... 496-18. Schematic Diagram USB Connector Section .......... 496-19. Printed Wiring Board USB Section ......................... 506-20. Schematic Diagram USB Section ........................... 516-21. Printed Wiring Board Effector Section ................... 526-22. Schematic Diagram Effector Section ...................... 536-23. Printed Wiring Board Panel Section ........................ 546-24. Schematic Diagram Panel Section .......................... 556-25. Printed Wiring Boards Function Section ................. 566-26. Schematic Diagram Function Section ..................... 576-27. Printed Wiring Board Power Amp Section ............. 586-28. Schematic Diagram Power Amp Section ................ 596-29. Printed Wiring Board Subwoofer Section ............... 606-30. Schematic Diagram Subwoofer Section .................. 616-31. Printed Wiring Boards Trans Section ...................... 626-32. Schematic Diagram Trans Section .......................... 63

7. EXPLODED VIEWS7-1. Main Section ..................................................................... 787-2. Front Panel Section (1) ...................................................... 797-3. Front Panel Section (2) ...................................................... 807-4. Front Panel Section (3) ...................................................... 817-5. Chassis Section ................................................................. 827-6. CD Mechanism Section (1) ............................................... 837-7. CD Mechanism Section (2) ............................................... 84

8. ELECTRICAL PARTS LIST ........................................ 85

6HCD-GTX88SECTION 1GENERAL This section is extracted

from instruction manual.

6GB

Guide to parts and controlsThis manual mainly explains operations using the buttons on the unit, but the same operations can also be performed using the buttons on the remote having the same or similar names.

Unit

Front view

Top view

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7HCD-GTX88

7GB

Guide

to parts and controls

1 FLANGER (pages 35, 43, 48)DELAY (pages 35, 43, 48)CHORUS (pages 36, 43, 48)SOUND FLASH (page 35)Press to create a party atmosphere.

B Display (pages 9, 38, 39, 48)C SURROUND SPEAKER MODE

(MHC-GTX88 only) (page 34)Press to select the sound system.

SURROUND(MHC-GTX77/MHC-GTX66 only) (page 34)Press to select the surround effect.

D Disc tray (pages 9, 17, 44, 48)E AMP MENU (page 38)

Press to change the spectrum analyser display or to adjust the brightness of the display.

F RETURN (pages 17, 25)Press to return to the parent folder.

G NX (play/pause) (pages 17, 22, 24, 30, 44)Press to start or pause playback.

x (stop) (pages 17, 23, 25, 28, 29, 30, 32, 44)Press to stop playback or recording.

./> (go forward/go backward) (pages 17, 20, 23, 25, 27, 31, 48)Press to select a track.

TUNING +/ (pages 28, 29)Press to tune in a radio station.

+/ (pages 17, 20, 23, 25, 27, 31)Press to select a folder.

m/M (rewind/fast forward) (page 30)Press to fast forward or rewind.

H CD- SYNC/REC 1 (page 22)Press to record from a disc onto the connected optional USB device (Digital music player or USB storage media).

CD-TAPE SYNC (page 31)TAPE REC PAUSE/START (page 31)Press to record onto a tape.

I PUSH OPEN/CLOSE Z (Deck B)(page 30)Press to insert or eject a tape.

Deck B (pages 30, 31, 37, 48)J ENTER (pages 23, 29, 33, 48)

Press to enter the selection.

K ERASE (page 23)Press to erase MP3 audio tracks or folders on the connected optional USB device (Digital music player or USB storage media).

L MASTER VOLUME (pages 17, 24, 39, 43)Turn to adjust the volume.

M MIC (jack) (pages 36, 43, 52)Connect an optional microphone.

MIC LEVEL (pages 32, 36, 43)Turn to adjust the microphone volume.

USB

Continuedl

8HCD-GTX88

8GB

N REC/ERASE (indicator) (pages 23, 25)Lights up when recording from a disc onto the connected optional USB device (Digital music player or USB storage media). Lights up when erasing MP3 audio tracks from the connected optional USB device (Digital music player or USB storage media).

O (USB) port (pages 22, 23, 24, 41, 52)Connect an optional USB device (Digital music player or USB storage media).

P PHONES (jack) (pages 43, 52)Connect the headphones.

Q Power illuminator (pages 35, 39)R PRESET EQ (page 33)

Press to select a preset sound effect.

S Z PUSH OPEN/CLOSE (Deck A)(page 30)Press to insert or eject a tape.

Deck A (pages 30, 48)T Function buttons:

CD (pages 14, 17, 22, 29, 31, 38)TUNER/BAND (pages 29, 38)TAPE A/B (pages 30, 38)AUDIO (pages 38, 41)VIDEO (pages 38, 41)

(pages 23, 24, 26, 38)Press to select a function.

U "/1 (on/standby) (pages 13, 14, 29, 43, 48)Press to turn the system on or off.

V GROOVE (page 33)Press to reinforce the bass.

W IR Receptor (page 43)

X EQ BAND/MEMORY (page 33)Press to select a frequency band when adjusting the graphic equalizer.

Y DISPLAY (pages 38, 39, 40)Press to change the information in the display.

Z OPERATION DIAL (pages 17, 25, 33, 35, 38)Turn to select a track or folder.Turn to select a setting.

wj ILLUMINATION (page 39)Press to change the power illuminator pattern.

wk DISC SKIP/EX-CHANGE (pages 14, 17, 18, 20)Press to skip a disc.Press to exchange other discs during playback.

Z OPEN/CLOSE (pages 14, 17, 44)Press to load or eject a disc.

DISC 1 ~ 3 (pages 18, 20)Press to select a disc.Press to switch to CD function from other function.

USB

9HCD-GTX88

9GB

Guide


Display

A Lights up when the USB function is selected (page 24).

B MP3 lights up when an MP3 audio track is recognized. CD lights up when a disc is recognized.

C Indicates the type of MP3 audio track information that displayed (page 39). lights up when a track name is displayed. lights up when an artist name is displayed. lights up when a folder name is displayed.

D Indicates the tuner band (page 28).E Lights up when the MP3 audio track

contains ID3 tag information.F Displays the current status and

information (page 39).G Indicators for the TUNER function

(page 28).H Lights up when the Play Timer or

Recording Timer is set (page 37).I Lights up when the Sleep Timer is

activated (page 37).J Lights up during recording (pages 22,

31).

K Indicators for the TAPE function (page 30). and lights up when the system is turned on. lights up when there is a tape in the deck.

L Lights up when an optional USB device (Digital music player or USB storage media) is recognized (page 22).

M Indicates the selected play mode (pages 19, 26).

N Indicators for the disc tray (page 17). lights up when the disc is selected. lights up when there is a disc on the disc tray. 1, 2 and 3 light up when the system is turned on.

O Indicates the activated sound effect (pages 33, 35).NoteLINK, MATRIX SUR 1 and MATRIX SUR 2 light up for MHC-GTX88 only.

FM AM ID3 AUTO PRESET STMONO

MHzkHz

TUNED

RECPLAY

SLEEP

CDUSB

MP3 BOOSTER

SUR

FLANGER CHORUS DELAYMATRIX SUR 12

LINKZ GROOVE

SHUF TAPE USB

USB MEMORY

PGMALL 1 DISCS

REP 1SYNC

A B1 2 3

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MP3

REC

A B

Continuedl

10

HCD-GTX88

10GB

Subwoofer A (SS-WG88A)

1 SUBWOOFER ON/OFF (page 13)Press to turn the subwoofer on or off.

2 SUBWOOFER LEVEL (page 13)Turn to adjust the subwoofer level.

Remote

1 "/1 (on/standby) (pages 13, 16, 43)Press to turn the system on or off.

B CLOCK/TIMER SELECT(page 38) CLOCK/TIMER SET (pages 16, 37) Press to set the clock and the timers.

C REPEAT/FM MODE (pages 21, 27, 29, 47)Press to change the Repeat Play setting.Press to select the FM monaural or stereo reception.

D USB (page 24)Press to select the USB function.

CD (page 17)Press to select the CD function.

TUNER/BAND (page 28)Press to select the TUNER function.Press to select FM or AM band.

FUNCTION (pages 30, 41)Press to select a function.

21

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11

HCD-GTX88

11GB

Guide


E ./> (go forward/go backward) (pages 17, 20, 23, 25, 27, 31, 37, 48)Press to select a track.

+/ (tuning) (pages 28, 29)Press to tune in a radio station.

m/M (rewind/fast forward) (pages 17, 25, 30)Press to find a point in a track.

(play) (pages 17, 24, 30, 44)X (pause) (pages 17, 30)x (stop) (pages 17, 25, 28, 30, 32)Press to start, pause or stop playback.

F ENTER (pages 16, 23, 28, 33, 37)Press to enter the selection.

G DISC SKIP (pages 18, 20)Press to skip a disc.

H +/ (pages 17, 20, 23, 25, 27, 31)Press to select a folder.

I VOLUME +/* (pages 17, 24, 39, 43)Press to adjust the volume.* The VOLUME + button has a tactile dot.

Use the tactile dot as a reference when operating the system.

J EQ (page 33) Press to select a preset sound effect.

K CLEAR (pages 21, 27)Press to delete a pre-programmed track.

L PLAY MODE/TUNING MODE (pages 19, 26, 28, 29, 44)Press to select the play mode of CD or USB function.Press to select the tuning mode.

qd TUNER MEMORY (page 28)Press to preset a radio station.

qf DISPLAY (pages 38, 39, 40)Press to change the information on the display.

qg SLEEP (page 37)Press to activate the Sleep Timer.

12

HCD-GTX88SECTION 2

DISASSEMBLYNote : Disassemble the unit in the order as shown below.

2-19. MOTOR (TB) BOARD(Page 22)

2-20. MOTOR (LD) BOARD(Page 22)

2-1. CASE (TOP)(Page 13)

2-2. LOADING PANEL(Page 13)

SET

2-3. TUNER PACK(Page 14)

2-16. DRIVER BOARD,SW BOARD,USB BOARD(Page 20)

2-15. BD91 BOARD(Page 20)

2-17. OPTICAL PICK-UP(Page 21)

2-4. CD BLOCK SECTION(Page 14)

2-10. BACK PANEL SECTION(Page 17)

2-5. FRONT PANEL SECTION(Page 15)

2-18. SENSOR BOARD(Page 21)

2-9. COVER (CDM)(Page 17)

2-11. POWER BOARD SECTION(Page 18)

2-13. SUBWOOFER BOARD,POWER BOARD(Page 19)

2-14. POWER TRANSFORMER(T1200)(Page 19)

2-12. MAIN BOARD(Page 18)

2-6. TAPE MECHANISM DECK,MIC BOARD,USB CONNECTOR BOARD(Page 15)

2-8. CD-SW BOARD(Page 16)

2-7. PANEL BOARD,FUNCTION BOARD,JOG BOARD(Page 16)

13

HCD-GTX88

2-2. LOADING PANEL

Note : Follow the disassembly procedure in the numerical order given.2-1. CASE (TOP)

1 screw (case 3 TP2)

6 screw (case 3 TP2)

2 two screws (case 3 TP2)

7 two screws (case 3 TP2)

4

9

qs

3 two screws (+BVTP 3 10)

8 two screws (+BVTP 3 10) qa two screws

(+BVTP 3 10)

qd case (top)

5 panel (side-R)

0 panel (side-L)

3 loading panel

2 Pull-out the disc tray.

1 Turn the pulley to the direction of the arrow.

pulley

Front panel side

CD mechanism deck (CDM74KF)

14

HCD-GTX88

2-3. TUNER PACK

2-4. CD BLOCK SECTION

3 tuner pack2 wire (flat type) (9 core) (CN1)


1 screw (+BVTP 3 8)

5 three screws (+BVTP 3 12)

2 lug

3 tapping screw

4 tapping screw

6 wire (flat type) (13 core) (CN701)

qs CD block section

7


0 CN903 (5P)

qa CN901 (2P)


15

HCD-GTX88

2-6. TAPE MECHANISM DECK, MIC BOARD, USB CONNECTOR BOARD

2-5. FRONT PANEL SECTION

0 front panel section

3

2 three screws (+BVTP 3 8)1 three screws

(+BVTP 3 8)



7 CN503 (3P)8 CN507 (8P)

9 CN903 (3P)

6 CN100 (4P)

1 three screws (+BVTP 2.6 (3CR))

2 three screws (+BVTP 2.6 (3CR))

5 two screws (+BVTP 2.6 (3CR))



0 USB CONNECTOR board

bracket (MIC shield)

8 MIC board

6

3 tape mechanism deck

4 knob (MIC)

16

HCD-GTX88

2-7. PANEL BOARD, FUNCTION BOARD, JOG BOARD

2-8. CD-SW BOARD

2 two screws (+BVTP 2.6 (3CR))3 two screws (+BVTP 2.6 (3CR))

8 five screws (+BVTP 2.6 (3CR))

9 four screws (+BVTP 2.6 (3CR))

0 six screws (+BVTP 2.6 (3CR))

qj three screws (+BVTP 2.6 (3CR))

4 PANEL board

qa PANEL board

qs knob (volume)

qd nut

qf holder (jog)

qg knob jog assy

qh gear (encoder)

qk JOG board

1 CN956 (2P) 6 CN905 (2P)

7 CN904 (3P)


2


3 two screws (+BTTP (M2.6))

4 three screws (+BTTP (M2.6))

5 CD-SW board

6 escucheon (CD)

17

HCD-GTX88

2-10. BACK PANEL SECTION

2-9. COVER (CDM)


3 cover (CDM)

CD mechanism deck

2 screw (+BVTP 3 10)

5 four screws (+BVTP 3 10)





1 CN1200 (3P)

2 CN1204 (4P)

3 CN1202 (2P)

9 CN580 (3P)

0 back panel section

18

HCD-GTX88

2-11. POWER BOARD SECTION

2-12. MAIN BOARD

2 two screws (+BV3 (3-CR))


8 screw (+BV3 (3-CR))


3 DC fan(M892)



qa POWER board section

1 CN581 (3P)

4 CN1214 (6P)5 CN1212 (7P)

1 screw (+BVTP 3 10)

2 MAIN board

POWER board assy

CN600

CN601

CN700

19

HCD-GTX88

2-14. POWER TRANSFORMER (T1200)

2-13. SUBWOOFER BOARD, POWER BOARD

1 two screws (transistor)

9 two screws (transistor)

qd screw (+BVTP 3 10)

qf bracket

qg POWER board

qs heat sink assy


7 holder


8 two screws (+BVTP 3 10)0 two screws

(+BVTP 3 10)

qa

5 CN607 (5P)

4 SUBWOOFER board



7 three screws

8 power transfomer (T1200)

TRANS board

6 three screws

3 DC fan(M892)

4 CN1214 (6P)

5 CN1212 (7P)

1 CN581 (3P)

20

HCD-GTX88

2-15. BD91 BOARD

2-16. DRIVER BOARD, SW BOARD, USB BOARD

3 BD91 board

2 Remove the four solders. 1 wire (flat type) (16 core) (CN301)

2 CN703 (4P)

3 CN704 (2P)

5 DRIVER board

7 SW board

1 two screws (+BVTT (M2.6))

6 screw (+BVTT (M2.6))

8 two screws (+BVTP2.6 (3CR))

9 USB board


21

HCD-GTX88

2-17. OPTICAL PICK-UP

2-18. SENSOR BOARD

3 two coil springs (insulator)5 two coil springs

(insulator)

4 two insulators 6 two insulators

7 optical pick-up (BU-K6BD91UR)

1 two floating screws (+PTPWH M2.6)

2 two floating screws (+PTPWH M2.6)

2 tray

3 belt (table)

5 pulley (table)

8 screw (+BTTP (M2.6))

0 SENSOR board

7 gear (geneva)

9 CN731(3P)

1 floating screw (+PTPWH M2.6)



22

HCD-GTX88

2-19. MOTOR (TB) BOARD

2-20. MOTOR (LD) BOARD

6 Remove the two solderings of motor.

8 MOTOR (TB) board

7 table motor assy (M741)


4

1 stopper

2 stopper

table


2 Remove the two solderings of motor.

4 MOTOR (LD) board

1 belt (loading)

5 loading motor assy (M751)


23

HCD-GTX88SECTION 3TEST MODE

4. When the [MASTER VOLUME] knob is turned clockwise evenslightly, the sound volume increases to its maximum and amessage VOLUME MAX appears on the fluorescent indicatortube.

5. When the [MASTER VOLUME] knob is turned counter-clockwiseeven slightly, the sound volume decreases to its minimum and amessage VOLUME MIN appears on the fluorescent indicatortube.

* Tape function1. Insert a tape in dack B. The function is changed to VIDEO

automatically when the recording is started by pressing [CD-TAPE SYNC] then press [TAPE REC PAUSE/START] button.During recording the ALC (Automatic Logic Control) is turnedon.

2. During recording, press m button will stop the recordingand the function is changed to TAPE B and rewind the tape inDeck B until the recording start position and playback of thetape in Deck B is started. If the [TAPE REC PAUSE/ START]button is pressed for a pause and pressed again to resumerecording during recording time, when the tape is rewind, thetape will be rewind until the position where the pause is applied.

* To release from MC Test mode1. To release from this mode, press ?/1 button.2. The cold reset is enforced at the same time.

[COLD RESET] The cold reset clears all data including preset data stored in the

RAM to initial conditions. Execute this mode when returningthe set to the customer.

Procedure:1. Press ?/1 button to turn on the system.2. Press x button, [ENTER] button and ?/1 button

simultaneously.3. The message COLD RESET appears on the fluorescent

indicator tube. Then, the fluorescent indicator tube becomesblank for while, and the set is reset.

[VACS ON/OFF] This mode is used to switch ON and OFF the VACS (Variable

Attenuation Control System).

Procedure:1. Press ?/1 button to turn on the system.2. Press x button and [ILLUMINATION] button simultaneously.

The message VACS OFF or VACS ON appears on thefluorescent indicator tube.

[TUNER STEP CHANGE] The step interval of AM channels can be toggled between 9 kHz

and 10 kHz.This mode is not available for Saudi Arabia model.

Procedure:1. Press ?/1 button to turn on the system.2. Press [TUNER/BAND] button repeatedly to select the AM.3. Press ?/1 button to turn off the system.4. Press [ENTER] button and ?/1 button simultaneously. The

system will turn on automatically. The message AM 9K STEPor AM 10K STEP appears on the fluorescent indicator tubeand thus the channel step is changed.

[GC TEST MODE] This mode is used to check the fluorescent indicator tube, LEDs,

buttons, MASTER VOLUME knob, OPERATION DIAL knob,model, destination, software version.

Procedure:1. Press x button, [ENTER] button and [DISC 2] button

simultaneously.2. All LEDs and segments in fluorescent indicator tube are lighted

up.All LEDs are lighted up in red color except for NX LEDwhere the LED is lighted up in green color.

3. When you want to enter to the model version and destinationdisplay mode, press [DISC 1] button. The model informationappears on the fluorescent indicator tube.

4. Each time [DISC 1] button is pressed, the display changes todisplay software version and date of the software creation. Thesequence is MC version, GC version, SYS version, CD version,CDDM version, CDMA version, CDMB version, BDA version,BDB version, ST version, TC version, TA version, TM version,MM1 version and MM2 version in this order, and returns to themodel version display.

5. Press [DISC 2] button, the key check mode is activated.6. In the key check mode, the fluorescent indicator tube displays

K 0 J0 V0.Turn the [OPERATIONAL DIAL] clockwise; J value increasesby one. Turn the [OPERATIONAL DIAL] counterclockwise; Jvalue decreases by one. Each time a button is pressed, K valueincreases. Press other keys on main unit to check whether thekey is detected. However, once a button has been pressed, it isno longer taken into account.V value increases in the manner of 0, 1, 2, 3 ... if [MASTERVOLUME] knob is turned clockwise, or it decreases in the mannerof 0, 9, 8, 7 ... if [MASTER VOLUME] knob is turnedcounterclockwise.

7. When [DISC SKIP/EX-CHANGE] button is pressed after all LEDsand segments in fluorescent indicator tube light up, alternatesegments in fluorescent indicator tube and LED would light up.If you press [DISC SKIP/EX-CHANGE] button again, another halfof alternate segments in fluorescent indicator tube and LEDswould light up. Pressing [DISC SKIP/EX-CHANGE] button againwould cause all LED and segments lights up.

8. To release from this mode, press three buttons in the samemanner as step 1, or disconnect the power cord.

[MC TEST MODE] This mode is used to check operations of the respective sections

of Amplifier, Tuner and Tape.

Procedure: To enter MC Test Mode1. Press x button, [ENTER] button and [DISC 3] button

simultaneously.2. The CD ring indicators and TAPE A and B indicators flash on

the fluorescent indicator tube. The function is changed toVIDEO.

* Check of Amplifier1. Press [EQ BAND/MEMORY] button repeatedly until a message

GEQ MAX appears on the fluorescent indicator tube. GEQincreases to its maximum.

2. Press [EQ BAND/MEMORY] button repeatedly until a messageGEQ MIN appears on the fluorescent indicator tube. GEQdecreases to its minimum.

3. Press [EQ BAND/MEMORY] button repeatedly until a messageGEQ FLAT appears on the fluorescent indicator tube. GEQis set to flat.

24

HCD-GTX88

[CD SERVICE MODE] This mode let you move the CD sled motor freely. Use this mode

when you want to clean the optical pick-up.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Press x button, [ENTER] button and [OPEN/CLOSE] button

simultaneously.4. The CD service mode is activated. The message SERVICE

MODE appears on the fluorescent indicator tube.5. With the CD in stop status, press M to move the optical

pick-up to outside track, or turn m to move to inside track.The message SLED OUT or SLED IN appears on thefluorescent indicator tube.

6. To turn on or off the laser, press [FLANGER] button. The messageLD ON or LD OFF appears on the fluorescent indicatortube.

7. To release from this mode, press ?/1 button to turn off thesystem.

[CD AGING MODE] This mode can be used for operation check of CD section. If an

error occurs, the aging operation would stops and the status isdisplayed. If there were no error occurs, the aging operationwould continue repeatedly.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Load three discs on disc tray.4. Press [PLAY MODE/TUNING MODE] button on the remote control

repeatedly to select the ALL DISCS mode, and press the[REPEAT/FM MODE] button on the remode control repeatedlyto select repeat mode off.

5. Press x button, [ENTER] button and [DISC SKIP/EX-CHANGE]button simultaneously.

6. Aging operation is started.7. To release from this mode, press ?/1 button or disconnect the

power cord to turn the power OFF.

Aging mode sequence:

DISC CHUCKING

TOC READING

PLAY FIRST TRACK FOR 2SECONDS

OPEN THE DISC TRAY

DISC SKIP

CLOSE THE DISC TRAY

START

PLAY LAST TRACK FOR 2SECONDS

EX-CHANGE OPEN/CLOSE

CHANGE THE NEXT DISC

25

HCD-GTX88

[CD ERROR CODE MODE] Display the CD error code when an error occurred.

Procedure:1. Press x button, [ENTER] button and [DISC 1] button

simultaneously to enter the error code display mode.2. The fluorescent indicator tube display the number of total error.3. Each time m button and M button are turned, display

change as below.

%% : The process when trouble occurs 01 : Process ejecting DISC 02 : Process waiting for inserting DISC 03 : Process sending request to insert a disc to upper

layer. 04 : Process sending request to eject a disc to upper

layer. 05 : Process pulling a DISC in. 06 : Chucking process 07 : Re-chucking process 08 : Process cancelling chucking

&& : The operation when trouble occurs 00 : Waiting for operation. 10/11/12/13: During eject operation 20 : While pulling a disc in 30 : While cancelling chucking 40/41/42/43: During eject operation due to error.

0000 : Not used (Value is fixed to 0000).

Display of BD error. It is shown with D and 11 digitsnumber.

DISPLAY OFTOTAL ERROR

DISPLAY OFMECHANICAL

ERRORS

BUTTONM m BUTTON

DISPLAY OFNO DISCERRORS

BUTTONM m BUTTON

M

M

M

M

4. To clear the error record, operate the cold reset. (Refer to theMC COLD RESET.)

5. To release from this mode, press the ?/1 button or disconnectthe power OFF.

Display of total error

Em** : The number of times for CDM (mechanical) errors.Ed** : The number of times for BD error (after chucking the

disc.).

Display of CDM (mechanical) error. It is show with M and11 digit number.

Em**Ed**

M*$$%%&&0000

M* : The number of history error for mechanical. (0 is latest one) (Turn > button to display next error.)

$$ : Mechanical errors occur in the operation. FF : Mechanical error during normal operation. Other: Mechanical error during initializing operation.

D*$$%%

D* : The number of error history (0 is latest one) (Press > button to display next error.)

$$ : The detail of trouble 01 : Can not focus 02 : GFS error 03 : Start-up time over 04 : Continuously out of focus 05 : Q code is not input for certain time 06 : Tracking on is impossible 07 : Blank disc

%% : The process when trouble occurs 01 : While SHIP process is performed 02 : While POWER OFF is processed 03 : While INITIALIZE (POWER ON) is processed. 04 : While oscillation stops 05 : From stopping oscillation to start oscillation 06 : During stop 07 : During STOP operation 08 : While start-up is processed 09 : While TOC reading is processed 0a : During search operation 0b : During PLAY operation 0c : During pause operation 0d : During PLAY manual search operation 0e : During PAUSE manual search operation

&& : Processing operation when trouble occurs Show each STEP mentioned in %% digits.

## : Disc speed when trouble occurs. 01 : x1 speed 02 : x2 speed (for models which support x2 speed) 04 : x4 speed

00 : Not used (value is fixed to 00).

26

HCD-GTX88

[CD REPEAT 5 LIMIT OFF MODE] The number of repeat for CD playback is 5 times when the re-

peat mode is REPEAT ALL. This mode enables CD to repeatplayback for limitless times.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Press x button, [CD] button and [DISC 1] button simultaneously

to enter the CD repeat 5 limit off mode and the fluorescentindicator tube displays LIMIT OFF.

To release from this mode, operate the cold reset.(Refer to the MC COLD RESET.)

[CD SHIP MODE (WITH MEMORY CLEAR)] This mode moves the optical pick-up to the position durable to

vibration and clears all data including preset data stored in theRAM to initial conditions. Use this mode when returning the setto the customer after repair.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Press x button, [SOUND FLASH] button and ?/1 button

simultaneously. The system will turn off automatically.4. After the STANDBY blinking display finishes, a message

MECHA LOCK is displayed on the fluorescent indicator tubeand the CD ship mode is set.

5. The Memory is clear after AC Power OFF.

[CD SHIP MODE (WITHOUT MEMORY CLEAR)] This mode moves the optical pick-up to the position durable to

vibration. Use this mode when returning the set to the customerafter repair.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Press [CD] button and ?/1 button button simultaneously. The

system will turn off automatically.4. After the STANDBY blinking display finishes, a message

MECHA LOCK is displayed on the fluorescent indicator tubeand the CD ship mode is set.

[CD/USB POWER MANAGE] This mode let you switch on or off power supply to the BU and

USB Micom during TUNER function.

When CD and USB POWER is set to OFF, the power supply tothe BU and USB Micom is cut off during TUNER function. Itwill increase the time taken to access CD and USB when functionchange from TUNER to CD or USB but it will improve tunerreception.

When CD and USB POWER is set to ON, the power supply tothe BU and USB Micom is not cut off during TUNER function.It will reduce the time taken to access CD or USB when functionchange from TUNER to CD or USB but it will decrease tunerreception performance.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD section.3. Press ?/1 button to turn off the system.4. When demonstration appear, press x button and ?/1 button

simultaneously. The set will power on automatically.5. The message CD/USB POWER ON or CD/USB POWER

OFF will be displayed on the fluorescent indicator tube.

[CD TRAY LOCK MODE] This mode let you lock the disc tray. When this mode is activated,

the disc tray will not open when [OPEN/CLOSE] button or [DISCSKIP/EX-CHANGE] button is pressed. The message LOCKEDwill be displayed on the fluorescent indicator tube.

Procedure:1. Press ?/1 button to turn on the system.2. Select CD function.3. Press x button, [OPEN/CLOSE] button simultaneously and

hold down until LOCKED or UNLOCKED displayed onthe fluorescent indicator tube (around 5 seconds).

[TCM OFFLINE MODE] This mode is used to prevent the system from turning off auto-

matically when TCM is not connected. Therefore, measurementscan be done even when TCM is not connected during produc-tion.

Procedure:1. When the system is turned off, press [EQ BAND/MEMORY]

button, [TAPE A/B] button and ?/1 button simultaneously. Thesystem will turn on automatically.

2. The message TCM OFFLINE will be displayed on thefluorescent indicator tube.

To release from TCM Offline Mode, perform COLD RESETor turn off the power supply.

[VACS DISPLAY] This mode is used to check the VACS level.

Procedure:1. Press ?/1 button to turn on the system.2. Press x button, [CHORUS] button and [DISC SKIP/EX-

CHANGE] button simultaneously.3. The VACS Level Display, the fluorescent indicator tube displays

VATB F APC. V represent VACS, A represent VACS levelwhich is triggered by signal level, T represent Thermal VACSNEO, B represent VACS level which is triggered by temperature,F represent FAN is triggered by software to turn in to highspeed, AP represent APVACS (Abuse Protection VACS) andC represent APVACS level which is triggered.

27

HCD-GTX88

[ERROR MESSAGE]1. GC error message

Display

Display on fluorescent indicator tube,

GC ERR01

When GC ERR01 message appears, all LEDs lights up andset becomes hang.Set does not respond to any main unit keys or remote controllerkeys.

What to do

1. Please check the model resistor value and replace with correctparts.

2. Plug in the set. The error message shall not be appear.

Precaution1. Clean the following parts with a denatured alcohol-moistened

swab:record/playback heads pinch rollerserase head rubber beltscapstan idlers

2. Demagnetize the record/playback head with a headdemagnetizer.

3. Do not use a magnetized screwdriver for the adjustments.4. After the adjustments, apply suitable locking compound to

the parts adjusted.5. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.

Torque Measurement

2.9m N m to 6.9m N mFWD CQ-102C 30 to 70 g cm

(0.42 0.97 oz inch)

FWD0.15m N m to 0.59m N m

back tensionCQ-102C 2 to 6 g cm

(0.03 0.08 oz inch) 2.9m N m to 6.9m N m

REV CQ-102RC 30 to 70 g cm(0.42 0.97 oz inch)

0.15m N m to 0.59m N mREVCQ-102RC 2 to 6 g cmback tension

(0.03 0.08 oz inch)4.8m N m to 16.7m N m

FF/REW CQ-201B 49 to 170 g cm(0.68 2.36 oz inch)

Mode Torque meter Meter reading

SECTION 4MECHANICAL ADJUSTMENTS

28

HCD-GTX88

[FM Tune Level Check]

Procedure:1. Turn the power on.2. Input the following signal from Signal Generator to FM

antenna input directly.

* Carrier Freq : A = 87.5 MHz, B = 98 MHz, C = 108 MHzDeviation : 75 kHzModulation : 1 kHzANT input : 35 dBu (EMF)

Note: Please use 75 ohm coaxial cable to connect SG and the set. Youcannot use video cable for checking.Please use SG whose output impedance is 75 ohm.

3. Set to FM tuner function and tune A, B and C signals.4. Confirm TUNED is lit on the display for A, B and C signals.

The mark of TUNED means The selected station signal isreceived in good condition.

FM signal generator

OUT (75 )SET

SECTION 5ELECTRICAL ADJUSTMENTS

1. Demagnetize the record/playback head with a headdemagnetizer.

2. Do not use a magnetized screwdriver for the adjustments.3. After the adjustments, apply suitable locking compound to the

parts adjust.4. The adjustments should be performed with the rated power

supply voltage unless otherwise noted.5. The adjustments should be performed in the order given in

this service manual. (As a general rule, playback circuitadjustment should be completed before performing recordingcircuit adjustment.)

6. The adjustments should be performed for both L-CH and R-CH.

7. Switches and controls should be set as follows unless otherwisespecified.

Test Tape

[RECORD/PLAYBACK HEAD AZIMUTHADJUST-MENT]DECK A DECK B

Note: Perform this adjustments for both decksProcedure:

1. Mode: Playback

2. Turn the adjustment screw and check output peaks. If the peaksdo not match for L-CH and R-CH, turn the adjustment screwso that outputs match within 1dB of peak.

Tape Signal Used forP-4-A100 10 kHz, 10 dB Azimuth Adjustment

set

MAIN boardCN510Pin 1 (L-CH)Pin 3 (R-CH)

MAIN boardCN510Pin 2 (GND)

+

level meter

test tapeP-4-A100(10 kHz, 10 dB)

screwposition

L-CHpeak

within1dB

outputlevel

L-CHpeak

R-CHpeak

within1dB

screwposition

R-CHpeak

TUNER SECTION 0 dB = 1 V DECK SECTION 0 dB = 0.775 V

29

HCD-GTX88

CD SECTION

[TEST DISC LIST]Use the following test disc on test mode. CD: YEDS-18 (PART No. 3-702-101-01)

or

PATD-012 (PART No. 4-225-203-01)

Note:1. CD Block is basically designed to operate without adjustment.

Therefore, check each item in order given.2. Use YEDS-18 (3-702-101-01) unless otherwise indicated.3. Use an oscilloscope with more than 10MW impedance.4. Clean the object lens by an applicator with neutral detergent

when the signal level is low than specified value with thefollowing checks.

[S-CURVE CHECK]

Procedure :1. Connect an oscilloscope to TP106 (FE) and TP124 (VC).2. Turn the power on.3. Load a disc (YEDS-18) and actuate the focus search. (In

consequence of open and close the disc tray, actuate the focussearch)

4. Confirm that the oscilloscope waveform (S-curve) issymmetrical between A and B. And confirm peak to peak levelwithin 3 0.5 Vp-p.

Note: Try to measure several times to make sure than the ratioof A : B or B : A is more than 10 : 7.

Take sweep time as long as possible and light up thebrightness to obtain best waveform.

3. Mode: Playback

4. After the adjustments, apply suitable locking compound tothe pats adjusted.

Adjustment Location: Playback Head (Deck A).Record/Playback/Erase Head (Deck B).

MAINboardCN510

test tapeP-4-A100(10 kHz, 10 dB)

pin 3

oscilloscopeL-CH

R-CH

V H

waveform of oscilloscope

in phase 45 90 135 180good wrong

pin 2pin 1

L

R

forwardreverse

+

TP106(FE)TP124(VC)

oscilloscope

BD91 board

symmetryS-curve waveform

within 3 0.5Vp-pA

B

30

HCD-GTX88

[RF LEVEL CHECK]

Procedure :1. Connect an oscilloscope to TP123 (RFO) and TP124 (VC).2. Turn the power on.3. Load a disc (YEDS-18) and playback.4. Confirm that oscilloscope waveform is clear and check if RF

signal level is correct or not.

Note: Clear RF signal waveform means that the shape can beclearly distinguished at the center of the waveform.

Connecting Location: CD board

+

TP123(RFO)TP124(VC)

oscilloscope

BD91 board

VOLT/DIV: 200 mVTIME/DIV: 500 ns

RF signal waveform

level: 1.3 0.3 Vp-p

IC401

BD91 Board (SIDE B)

TP124(VC)

TP123(RFO)

TP106(FE)

IC101

1

1

14

1528

2526

505175

76

100

31 31

HCD-GTX88

HCD-GTX88

6-1. BLOCK DIAGRAM RF/SERVO SECTION

(Page 34)

SECTION 6DIAGRAMS

DETECTOR

9795

9496

98

100

FNI1FPI1FNI2FPI2

TPI

TNI

LD0

MDI

CD RF AMP,FOCUS/TRACKING ERROR AMP,DIGITAL SIGNAL PROCESSOR,DIGITAL SERVO PROCESSOR,

DIGITAL FILTER,D/A CONVERTERIC101

OPTICAL PICK-UPBLOCK

(KSM-213DCP)

2AXISDEVICEFOCUS/

TRACKINGCOIL

91

92

2627 24

AUTOMATIC POWER

CONTROLQ301

LASERDIODE

FOCUS COILDRIVE

1817 20

TRACKING COILDRIVE

129

1310

FOCUS/TRACKING COIL DRIVER,SPINDLE, SLED MOTOR DRIVER

IC401

21

SPINDLE MOTORDRIVEMM

M401(SPINDLE)

MMM402

(SLED)

FMOFOO

DNDTRO

23 XI

24 XO

VREF

FOO

BCD

F

E

LD

PD

FCS+FCS

SL

SL+

SP+

SP

TRK+TRK

VC

VREF

VREF11PREF77VRO84

SLED MOTORDRIVE

23

7

XRST1 24

SBSY19

BIAS

MUTE

MMUTE2

4I/O11

TRO

FMOFOO

DMOTRO

FMODMO

30

27

CD+1.5V REGIC201 DVDD+3.3VCD+1.5V

LO

RO

CD LCH

CD RCH

47AOUT2(PO5) DATA63BCK(PO8) CLK51PIO3 GATE49PIO1 ST REQ65AIN(PI4) AIN66BCKI(PI5) BCKIN67LRCKI(PI6)

SELECT112

1B31Y

4C

3C

2C

1C

4

2Y 7

1A2

2A5

2B6

3A11

6

5

13

4O/I

3I/O3O/I

2I/O

2O/I

1I/O1O/I

10

232221

6

39

35

38BUS0

98

39BUS1

34

40BUS2 (SO)

12

1110

98

34

12

41BUS3 (SI)

48PIO1

LRCKINBUS3BUS2BUS1BUS0

3Y 9

4Y 12

REQCCE

3B10

4A14

4B13

BUCK

VM+7V

20 IO0(/HSO)

USBSECTIONB

MAINSECTIONA

Signal Path

1112

93

93CCE

BUS0BUS1

BUS2BUS3

SEL SW

CDCLKCDCCE

MP3IREQ

42BUCK

37RST

54SBSY

4I/O 124C

3C

2C

1C

6

5

13

4O/I

3I/O

3O/I

2I/O

2O/I

1I/O1O/I

21

22

X10216.934MHz

S201(LIMIT)

DVDD+3.3V

SYSTEM CONTROLIC401 (1/6)

SELECT SWITCHIC567

SELECT SWITCHIC566

SELECT SWITCHIC568

SELECTSWITCH

Q602

A

: CD PLAY

: DIGITAL

: USB

(Page 33)

3232

HCD-GTX88

HCD-GTX88

6-2. BLOCK DIAGRAM TAPE/TUNER SECTION

(Page 33)

(Page 33)

(Page 33)

ST-L E MAINSECTION

REC-OUT-LREC-OUT-L D MAINSECTION

TAPEMECHANISM

BLOCK

32

A TRIGGER DRIVEQ340,343

R-CH

TU901FM/AM TUNER UNIT

ANTENNA

ST-L

FM ANT

AM ANT

AM ANT

ST-R

ST-DIN/MC-DOUTST-DOUT

ST-CLKST-CE

FM 75 COAXIAL

CAP M+

BTRGM+

ATRGM+

AHALFBHALF

B SHUTA SHUT

REC(FWD)

CAPM-CONT

B-TRIG

A-TRIGTC-RELAY

A-HALFB-HALF

B-SHUTA-SHUT

REC BIASPB-A/B

ALCREC-MUTETC-MUTE

AM

EQ OUT1A

B

ST-DIN/MC-OUTSY-DOUT/MC-DINST-CLKST-CE

34

28 27 26

2421

5557

585960

42 3

9089

91525651

54

53

E-1 45E-2 44E-3 43

8684

8587

13 11 15 14

PB OUT1TAI1

REC IN1

AIN1

BIN1

A/B

ALC

ON/O

FF

REC

MUT

E ON

/OFF

MUT

E ON

/OFF

DECK A/B SELECT,PB/REC EQUALIZER AMP

IC301

SYSTEM CONTROL(TAPE MECHANISM CONTROL)

IC401 (2/6)

REC-OUT1EQ

TC-PB-L

TESTCONNECTOR

CN510

R-CH R

L

C MAINSECTIONPB

HEAD

DECK-A

DECK-B

BIAS OSCQ370

BIASTRAP

MUTE CONTROLSWITCH

Q377, 379

TC PB MUTECONTROL SWITCH

Q382.383

R-CH

R-CH

Q376

Q373,374

Q381

L CH

R CH

R-CH

BIAS+9V

REC/PBHEAD

ERASEHEAD Q378,380

T301

L CH

R CH

R-CH is omitted due to same as L-CH.

A TRIGGER DRIVEQ342,345

CAPSTAN MOTOR DRIVEQ341,344

4

1

2

TABLE ADDRESS SENSORIC731

LD MOTOR DRIVERIC701

TBL MOTOR DRIVERIC712

M+9V

Q731

MOTORDRIVE

M751(TABLE LOADING)M

RE701ROTARY ENCODER

DISC TRAYADDRESS DETECT

S751OPEN/CLOSE

DETECT

LM-F

TBL SENS

FINRIN

48

OPENSW 41

LM-R 4979

OUT2OUT1

24

MOTORDRIVE

M741(TABLE)

MTM-FFINRIN

46TM-R 47

79

OUT2OUT1

24

: TAPE PLAY (DECK B): TAPE PLAY (DECK A): TUNER

: RECORD (DECK B)

Signal Path: AUDIO

33 33

HCD-GTX88

HCD-GTX88

6-3. BLOCK DIAGRAM MAIN SECTION

(Page 31)

(Page 35)

(Page 32)

(Page 35)

(Page 32)

(Page 36)

(Page 32)

(Page 35)J101

RCH

L

CD LCH

CD RCH

R

AUDIOIN

CD RCH

11109

3

RCH

MIXERIC1500

MULTIPLEXERIC1503

DIGITAL DELAYIC1501

SIGNAL SELECTERIC564

SURROUND VOLUME CONTROLIC201

INPUT SELECT SWITCH,GRAPHIC EQUALIZER CONTROL,

ELECTRICAL VOLUMEIC101

SIGNAL SELECTERIC563

MIC AMPIC1100(1/2)

MIC AMPIC1100(2/2)

RV1150MIC

LEVEL

LPF1IN

ABC

COM

CDA-MUTE

SOURCESEL 2

SOURCESEL 1

CTRL1

CTRL3

DATA CLK ZGROOVE

FREQ

LINEMUTE

EFFECTOR


S0 S1 S2 SEL

9LPF2OUT

19SAOUT

A+9V

L+R

SPEANAJ1100 (2/2)

10LPF2IN

11OP2OUT

12OP2IN

LPF1OUT

CLOCK14

3

2

25 26 2771865 28 78 77 81 82 75 80 79 66

RCH

L

R

VIDEOIN

MIXERIC1505

BUFFERQ1513

MUTEQ250

CD MUTEQ540

DBFBSWITCH

Q101SELECTSWITCH

Q596

SELECTSWITCH

Q597

BUFFERQ1509

EFFECTORSELECTSWITCH

Q598

XRF/SERVOSECTION A

ST L

TC PB L

XTAPE/TUNERSECTION

TAPE/TUNERSECTION

E

X DISPLAY/POWERSECTION

G

X AMP/SUBWOOFERSECTIONI

REC OUT L X TAPE/TUNERSECTION

D

X AMP/SUBWOOFERSECTION

F

X AMP/SUBWOOFERSECTION

H

XC

4 IMB1

DBFB F/B

SWITCHQ608

SWITCHQ591

3 INA1

6 IND1

14 LFE VOL IN

2 MIC

8RECB1

FL18OUT1

24SWOUT

16BB A117BB B1

11TCA1

21DATA22CLOCK

12TCB1

SW OUT34FL OUT

17DATA18CLOCK

MUTEQ180

D+4V REGQ325

MUTEQ607

LINE MUTEQ544

1

53

10

Y0

Y1Y

A

D101,102

J103

EXCEPT AUS MODEL

D-LIGHTSYNC OUT

3

2

9

10

Y1

Y2

Y3

A

B

Y

5

4

J1100(1/2)

MIC

Q1500

Q1508

Q1506

Q1502

RCH

M61529

DATACLK

M61530

7

13

5

3

: AUDIO

: CD PLAY

: TAPE PLAY (DECK A)

: TAPE PLAY (DECK B)

: MIC

: TUNER

Signal Path R-CH is omitted due to same as L-CH.

Abbreviation AUS : Australian model

3434

HCD-GTX88

HCD-GTX88

6-4. BLOCK DIAGRAM USB SECTION

(Page 31)

7778

3

45

VBUS+5V

USB CONTROLIC901

VBUSPOWER ON/OFF

SWITCHIC915


S-RAMIC921

CN952

1

4(USB)

VBUS

D

D+

GND

OUT

P75/USBOCP76/USBPON

D

OE

A0I

A2

A3I

A6

A7I

A10

A11I

A15

WELBUB

CE

D+

IN

FLGEN 1

80

79

PF1/RXDODATA 85PF2/SCLK0/CTSO/CLK/TB0OUT0CLK 86PN5/HSS1/SCL1GATE 94

PN4/HSS0/SDA1A IN 93PN3/HSCLKBCK IN 92P83/CS3/WAIT/TA5OUTLRCKIN 71

P64/A20

P63/A19P62/A18P61/A17

USBRST

USB SERIAL TXDOUSB SERIAL RXDO

USB SERIAL RTSOUSB SERIAL CTSO

BUS3 58BUS2 57BUS1 56BUS0 55

P66/A22CCE 60P65/A21BUCK 59

PG3REQ 96

PG2ST REQ 97

P70/RDP71/SRWR

18I

25

28I

35

64 411765

P72/SRLLBP73/SRLUB

66 394067

P82/CS2 70 16

RESETPC0/INT0

1 31382

PF0/TXD0PF4/RXD1/SPDI

84 343588

PF3/TXD1/SPD0 87

X1 75

X2 73

36

P00/D0I

P07/D7

P10/D8I

P17/D15

37I

43

46I

54

44I

42

27I

24

21I

185I1

I/O0I

I/O3

I/O4I

I/O7

I/O8I

I/O11

I/O12I

I/O15

7I

10

13I

16

29I

32

35I

38

P41/A1I

P47/A7

P50/A8I

P60/A16

RF/SERVOSECTION B

X9019kHz

Signal Path

: USB

: DIGITAL

35 35

HCD-GTX88

HCD-GTX88

6-5. BLOCK DIAGRAM AMP/SUBWOOFER SECTION

(Page 33)

(Page 33)

(Page 36)(Page 36)

(Page 33)

MUTINGQ604, 606, 610

F-R

DBFB F/B

F-L

67

STK

MUT

E

12OVER LOAD

DETECTQ668, 618

+ + +

MUTEQ640, 641

MUTECONTROL

Q634,682,684

71

LINK

REL

AY

88

FAN

HI S

PEED

97

SW V

OL L

ED

100

HP D

ET

95

SW V

OL IN

RELAY DRIVEQ644, 647

+VLVL

IN1

ST BY

+RE1RE1

+RE2RE2

+VCCVCC

SW OUT

+-

-+

FRONT SPEAKER

SUB WOOFEROUT

L

R

PHONESJ1101

RY646

RY862+-

-+

L

R

FAN MOTORDRIVE

Q579, 585 DC FANM891

M

M

FAN MOTORDRIVE

Q586588

FAN CONTROLSWITCH

Q584

FAN DETECTQ580582

DC FANM892

TH629

THERMALDETECT

Q628, 630

94

THER

MAL

VAC

S

TB001

TM600

D624

D550

18 1110

914 8

SIGNAL PATH

POWER AMPIC601

69

PROT

ECTO

R

70

FRON

T RE

LAY

68

HP M

UTE

HMAINSECTION

FMAINSECTION

MAINSECTION I

DISPLAY/POWERSECTION

KDISPLAY/POWER

SECTIONJ

TH630

11

45

67

32

13

OCP CTOUT

VL(AC)

1

VP2

43

STK MUTEQ812

SUBWOOFER POWER AMPIC800


OVER CURRENTPROTECTOR

IC550

OVERLOADDETECT

Q850

AC OUTDETECT

Q815

UNDER VOLTAGEDETECT SWITCH

Q506

RELAYDRIVEQ814

OVERLOADDETECT

Q800

OVERLOADDETECTSWITCH

Q648

RY665

FAN CONTROL

HI SPEEDSWITCH

Q581

SYSTEMCONTROL

+9V

CN102

+-

-+

SURROUND SPEAKER

L

R

TM601

RELAY DRIVEQ666

72

SW S

PK R

ELAY

61

UNDE

R VO

LTAG

E DE

T

R-CH is omitted due to same as L-CH.

: AUDIO

3636

HCD-GTX88

HCD-GTX88

6-6. BLOCK DIAGRAM DISPLAY/POWER SECTION

USB +5V

ND900VACUUM

FLUORESCENTDISPLAY

9, 1

0, 1

2

22,

24

41,

43

47

1

6, 8

7-10

0

P1

36

G2

21

64

66

7, 8

, 86

BF4

1

SPECTRUMANALYZER

IC902

67

6816

2

15 69

71

48

80

ALL BAND

BF3

BF1

IN2

IN1

VKK

LED SELECTOR

G1,22,23G1,22,23

G2-21

13

17

73 VOLUMEMASTERVOLUME

SPEANA

P1 36

VF1VF2

D900VG

(32V)

FUN CONTROL

X9004MHz

83 XI

82 XO

52

59,

75,7

6,78

,79

LED DRIVEQ906911, 913916

920,921

D906, 908, 910, 913, 917, 921, 929, 923, 925, 927

D905, 907, 909, 912, 914, 916, 922, 924, 926.955

LED+9V

Q903

Q902

Q901

Q900

D904(R)

D930(G)

KEY2 |

KEY0

S901 914,916 933

60I2C DATA61I2C CLK77RESET

30 IIC-DATA29 IIC-CLK

IIC-DATA

IIC-CLK

37 GC-RESET

74 POWER-KEY

73 DISPLAY-KEY

S934

S900DISPLAY

33 STBY-LED/FAN CONTROL

4 SIRCS RESET

X4025MHz

15 X-IN

13 X-OUT

X40132.768kHz

10 XC-IN

11 XC-OUT


50STBY-RELAY

12RESET

20AC-CUT

D671

D402

D501,504

POWERSWITCHING

LED DRIVEQ904,905

RECTD658

RECTD656

+VL

VL(AC)

F1261 VL

VL

VH

VH

VP

VF

VF

GNDF1271

F1241

F1251

R1292

VL

+VHVH

33VREGULATOR

Q1264

POWER ON/OFFRELAY DRIVE

Q1200

VG(-32V) D1292

RECT

VF1

VF2

ND900VACUUM

FRUORESCENTDISPLAY

RY1200

AC IN

T1200POWER

TRANSFORMER

RESETSWITCH

Q501

REMOTE CONTROLSIGNAL RECEIVER

IC901EVER +4V

D+3.3V

DISPLAY CONTROL,KEY CONTROL

IC900

BUFFERQ917, 918, 919

70 BF214

72 OPERATION DIALROTARYENCODER

ROTARYENCODER

OPERATIONDIAL

NO402

(FOR CHECK)

CN402(3/3)

(FOR CHECK)

40USB-POWER

63OVER VOLTAGE DET

32CD POWER

USB POWERCONTROLSWITCH

Q590,603

RECTD540

M +9VVM +7V

LED +9V

A +9VST +9V

OVER VOLTAGEDETECT SWITCH

Q550

AC3

AC3F1281

AUDIO +9VBIAS +9V

UNREG

S1200

S1200

230 240V|

220V|

120V

VOLTAGESELECTOR

AUS,AR MODEL

E2,E51 MODEL

S936

S935

XMAINSECTION G

XAMP/SUBWOOFERSECTION K

XAMP/SUBWOOFERSECTION J

LEVELDETECTIC402

USB+5V REGIC565

+9V REGIC560

+9V REGIC561

DVDD+3.3VREG

IC562

D592

D561,562

D590,594

E2,E51MODEL

D593

DVSS +3.3V

D +3.3V

AVDD +3.3V

DVDD +3.3V

USB POWERCONTROLSWITCH

Q604606

CD POWERCONTROLSWITCH

Q560,561

USB+9V REGIC570

D+4V REGIC569

Abbreviation AR : Argentina model AUS : Australian model E2 : 120V AC area in E model E51 : Chilean and Peruvian model

(Page 33)

(Page 35)

(Page 35)

37

HCD-GTX88

6-7. CIRCUIT BOARDS LOCATION

MOTOR (LD) board

SENSOR board

SW board

MOTOR (TB) board

DRIVER board

MAIN boardMIC board

JOG board

FUNCTION board

PANEL board

BD91 board

USB board

USB CONNECTOR board

POWER board

TRANS board

PRIMARY board

CD-SW board

TUNER PACK

EFFECTOR board

SWITCHING POWER

SUBWOOFER board

38

HCD-GTX88

Note For Printed Wiring Boards And Schematic Diagrams

Note on Printed Wiring Board: X : parts extracted from the component side. Y : parts extracted from the conductor side. : Pattern from the side which enables seeing.

(The other layers patterns are not indicated.)Caution:Pattern face side: Parts on the pattern face side seen from(Conductor Side) the pattern face are indicated.Parts face side: Parts on the parts face side seen from(Component Side) the parts face are indicated.

Indication of transistor. A : B+ Line. B : B Line. Voltage and waveforms are dc with respect to ground

under no-signal (detuned) conditions. BD91 and Driver sections.

no mark : CD PLAY Except BD91 and Driver sections.

no mark : FM( ) : CD PLAY< > : TAPE PLAY[ ] : TAPE REC : Impossible to measure

Voltages are taken with a VOM (Input impedance 10 M).Voltage variations may be noted due to normal produc-tion tolerances.

Waveforms are taken with a oscilloscope.Voltage variations may be noted due to normal produc-tion tolerances.

Circled numbers refer to waveforms. Signal path.F : AUDIOf : TUNERE : TAPE PLAY (DECK A)d : TAPE PLAY (DECK B)G : TAPE REC (DECK B)N : MICJ : CD PLAYc : DIGITALI : USB

AbbreviationAR : Argentina modelAUS : Australian modelE2 : 120V AC area in E modelE51 : Chilean and Peruvian model

Note: The components identified by mark 0 or dotted linewith mark 0 are critical for safety.Replace only with part number specified.

UNLEADED SOLDERBoards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead.(Caution: Some printed circuit boards may not come printed with

the lead free mark due to their particular size)

: LEAD FREE MARKUnleaded solder has the following characteristics. Unleaded solder melts at a temperature about 40 C higher than

ordinary solder.Ordinary soldering irons can be used but the iron tip has to beapplied to the solder joint for a slightly longer time.Soldering irons using a temperature regulator should be set to about350 C.Caution: The printed pattern (copper foil) may peel away if the

heated tip is applied for too long, so be careful! Strong viscosity

Unleaded solder is more viscou-s (sticky, less prone to flow) thanordinary solder so use caution not to let solder bridges occur suchas on IC pins, etc.

Usable with ordinary solderIt is best to use only unleaded solder but unleaded solder may alsobe added to ordinary solder.

C

BThese are omitted.

EQ

B

These are omitted.

C E

Q

B

These are omitted.

C E

Q

Note on Schematic Diagram: All capacitors are in F unless otherwise noted. (p: pF)

50 WV or less are not indicated except for electrolyticsand tantalums.

All resistors are in and 1/4

W or less unless otherwisespecified.

2 : nonflammable resistor. C : panel designation.

39 39

HCD-GTX88

HCD-GTX88

Waveforms

BD91 BOARD (CD PLAY)

USB BOARD

MAIN BOARD

PANEL BOARD

1.4 Vp-p

9 MHz

1 IC901 ug

1 V/DIV, 0.1 sec/DIV

(X1)

3.1 Vp-p

1V/DIV, 0.2 sec/DIV

4MHz

1 IC900 is XO

1 Vp-p

32.768 kHz

1 IC401 q; (XC-IN)

0.5 V/DIV, 0.1 sec/DIV

1.5 Vp-p

5 MHz

2 IC401 qg (X IN)


1 IC101 5 (FEI)

2 IC101 6 (TEI)

100 mV/DIV, 0.2 msec/DIV

50 mV/DIV, 0.1 sec/DIV

3 IC101 wf (XO)

100 mV/DIV, 5 msec/DIV


2.4 Vp-p

4 IC101 og(FNI1(A))

Approx.150 mVp-p

16.934 MHz

Approx.200 mVp-p

Approx.200 mVp-p

4040

HCD-GTX88

HCD-GTX88

6-8. PRINTED WIRING BOARD BD91 SECTION Refer to page 37 for Circuit Boards Location. : Uses unleaded solder.

(Page 48)

1

A

B

C

D

E

F

G

H

I

2 3 4 5 6 7 8 9 10 11 12 13 14

MAINBOARDCN5051

A

R216R214

R213

R155

C128

C106

C201

R30

4R30

2

C309

C205

C207

C307

X102

R201

R303

C133

R111

R112

C115

R21

1

Q301

R30

1

C204

C202

C206

C306

R212

C401

C405

C130

IC201

X102

R11

9

R121

R114

C153R118

R41

5

C112

C108

M401(SPINDLE)

M402(SLED)C4

28

R150R149

R148

R15

4

R153

C148

C110

C109

C301

C303

C302

C104

R11

0

C116

C404

R203R204R205R206R207R208

R209R210

R219

R223R222

R147 R221

R218

R146 R145

C150

C403

R202

C151

C105

C147

C146

C145

C152

C118

C117

C144

C101

C125

TP124(VC)

TP123 (RFO)

TP106(FE)

C143

C120

R14

4

R157

C142

C141

C140

C100

C107 R40

8

R156

C124

IC401

C127C126

CN301

OPTICAL PICK-UP BLOCK

R101

C119

C102

IC101

C103

R40

5

C113

R102

R402

R10

5

R106C132

C138C137 R

135

R13

4

R13

6

R128

R12

9

R143

R14

2

R13

9

C136

C149

C139

R140

R15

1

C122

C123

R220

R104

R224

R109 R108

CN20

2

R41

4

S201(LIMIT)

M

M

1-872-620- (12)12

1-872-620- (12)12

1

3 4

5

41 41

HCD-GTX88

HCD-GTX88

(Page 45)

Refer to page 39 for Waveforms. Refer to page 64 IC Block Diagrams.

6-9. SCHEMATIC DIAGRAM BD91 SECTION Refer to page 70 for IC Pin Description of IC101.

IC B/D

IC B/D

Q301

R304

R303

IC201

C202

R140

R144

R110

R101

R157

R156

R114

C201 R201

R202

R211

R203

R204R205

R206R207R208

R209R210

R212

R213R214

R216

TP205

TP211TP212

TP213TP214TP215

TP216TP217

TP218TP219

TP208

TP209

TP204TP203

TP202TP201

TP221

TP222

TP108

TP109

TP110

TP111

TP112

TP113

TP226

TP225

TP224

TP210

TP220

TP206TP207

TP119

TP117

TP118

TP121

TP116

TP115

TP114R301

R111

TP104

TP223

TP103

TP101

TP102 R151

TP315

R223

R222R221

R220R219R218

TP124

R145

R146R147

R148R149

R150

TP125 TP228

TP227R224R109

R143

R139

C106

C401R415

R129

R142

R153

R154

R155

CN202

TP305TP304

TP301TP302

TP303TP306

TP307

TP313TP308

TP310TP311

TP309

C307

C309

C301

C100

C140

C141C142

C105

C143 C144C146

C145C148C147

C149C104

C150

C118

C117

C120

C119

C102 C127

C126

C103

C113

C101

C132

C128 C130

C110

C133

C153

C151C152

C205

C204

C403C404

C405

C115

C116

R112

C206

C109C207

R121

TP120

TP122

TP123

C139

TP312

C302

C303

TP314

C306

R302

C137 C138

R118 C108

R119

C112

R134

R135R136

C136

R130

R128

C107

IC101

R104

R105 R106

R102

TP107

TP106

TP105

C122

C123

C125

C124

R405

R402

R408R414TP407

TP408

TP409

TP410

X102

S201

M401

M402

CN301

IC401

R108

4242

HCD-GTX88

HCD-GTX88

6-10. PRINTED WIRING BOARDS DRIVER SECTION Refer to page 37 for Circuit Boards Location. : Uses unleaded solder.

1

A

B

C

D

E

F

G

H

2 3 4 5 6 7 8 9 10 11 12 13 14

(OPEN/CLOSE DETECT)

(DISC TRAY ADDRESS DETECT)

1

9

1

9

1

4

1

21 2

CN751S751

IC731

CN731

CN741

CN74

2

CN72

1

MAINBOARDCN511

B

C715

C731

C735

C736

R70

1

R711

R731

R721

R722

R723

R73

6R

732

R733

R73

4

D70

1

D71

1

C751

IC712IC701

CN704

C737

R71

3

R712

C741

R70

2

JW702

JW703

JW704

JW705

JW706

JW707

JW70

8

JW711CN703

CN702 CN705

R751

C752

JW712

JW701

JW70

9

JW710

JW713

JW714

CN70

1

Q731

B E

(Page 48)

43 43

HCD-GTX88

HCD-GTX88

6-11. SCHEMATIC DIAGRAM DRIVER SECTION Refer to page 64 for IC Block Diagrams.

(Page 44)

IC B/D

IC B/D

MAINBOARD (1/4) CN511

B

390

R751

C752CN705

CN704CN721

CN751

C751

IC701

IC712

R701

R713

R711

R723 R721R722

C735C736C737

R736

R733R731

C731

Q731

C741

CN703

IC731CN731 CN741

CN742

C715

R702

R712

R732R734

D711

M751

M741

S751

CN701

D701

CN702

CN711

RE701

4444

HCD-GTX88

HCD-GTX88

Refer to page 39 for Waveforms. Refer to page 64 IC Block Diagrams.

6-12. SCHEMATIC DIAGRAM MAIN SECTION (1/4) Refer to page 72 for IC Pin Description of IC401.

(Page 57)

(Page 63)

(Page 46) (Page 47)

(Page 45)

(Page 45)

(Page 43)

1312

B

754 11

E

10

I

H

D

9

G

6

A

14

F

2

J

C

31 8

IC B/D

3.20

3.7

3.7

4 15 1515

6.2

3.20.1

15 3.3

1.9

1.3

1.3

3.2

2.5

3.2

0.2

-0.2

3.1

3.4

3.3

3.2

3.2

3.2

3.3

3.2

3.3

3.3

3.2

3.2

3.4

3.4

3.4

0

0

0(3.2)

0(3.2)

0

0

3.2

0.1

3.3

3.4

3.3

3.1

3.1

2.8

0.8

3.4[0]

3.4[ ]

3.4< >

2.9

3.2

0.1

0

0

0

00

3.4

0 0

0[3.

2]

0[3.

2] 3.3

3.3

0[3.

3]

3.3 0.1

3.3

3.4

0(3.

3) 3.3

3.2

2.7

3.4

3.2

3.2

3.2

3.4

3.4

3.2

3.2

3.2 0 0

9.1

9.1

9.1

0

0

0 9.1

9.1

9.1

0

9.1

0[3.2]

0.9[9.1]

9.1[0.1]

9.1[8.3]

0(3.2)

3.2

3.2(-6.8)

3.3

3.2

-6.6

0.1

1.3

3.4

0[3.4]

3.2

0 0 0 0 000 3.7

0 3.2

3.3

3.3

1.5

1.8

3.2

1.3

0.6

0 3.2(

0)

0 3.3

3.3

3.3

0(3.

3)

3.3

2(AUS)(EXCEPT AUS)

3

(E2,E51)(AUS)

2 2

(AR)

E2,E51MODEL

AUS,ARMODEL

(EXCEPT E2)(E2)

1

1

1

E2MODEL

MAIN BOARD

1

2

3

4

5

6

7

8

9

10

11

12

13

13PCN511

OPEN SW

D+3.3V

TBL ADD SW

E-3

E-2

E-1

TM-F

TM-R

LMF

LMR

MGND

MGND

M+9V

123456789101112131415161718192021222324252627282930

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

IC401M30622MGP-A57FPU0

XRST

MM

UTE

CD C

CE

SIR

CS

CD C

LK

MP3

IREQ

SOU

RCE

SEL

1

BYTE

CNVs

sXC

-IN

XC-O

UT

RES

ET

X-O

UT

VSS

X-IN

VCC

NM

I

SOU

RCE

SEL

2

SBSY

AC-C

UT

BUS3

BUS2

BUS1

BUS0

EFFE

CTO

R-S

0

EFFE

CTO

R-S

1

EFFE

CTO

R-S

2

EFFE

CTO

R S

EL

IIC-C

LK

IIC-D

ATA

USBRST

CD-POWER

STBY LED/ FAN CONTROL

USB SERIAL CTS0

USB SERIAL TxD0

USB SERIAL RxD0

GC RESET

USB SERIAL RTS0

SEL_SW

USB PWR

OPEN-SW

TBL-SENSE

E-3

E-2

E-1

TMF

TMR

LMF

LMR

STBY RELAYAT

RIG

A-H

ALF

CAPM

+

BTR

IG

REC

BIA

S

TC-R

ELAY

PB-A

B

ALC

REC

MU

TE

TC M

UTE

UN

DER

VO

LTAG

E D

ET

VCC

OVE

R V

OLT

AGE

DET

VSS

CD U

SB M

UTE

LIN

E M

UTE

STK

MU

TE

HP

MU

TE

PORT

ECTO

RFR

ON

T R

ELAY

LIN

K R

ELAY

SW-S

PK-R

ELAY

DIS

PLAY

-KEY

POW

ER-K

EY

Z G

RO

OVE

FR

EQ

NO

USE

CTR

L3

CTR

L1M

6153

0-D

ATA

M61530-CLK

M61529-DATAM61529-CLK

NO USE

ST-CE

ST-DIN/MC-DOUT

ST-CLK

ST-DOUT/MC-DIN

FAN HI SPEED

A SHUT

B SHUT

B-HALF

MODEL-IN

DEST-IN

THERMAL VACS

SW VOL IN

AVSS

SW-VOL-LED

VREF

AVCC

HP DET

1

2

3

4

5

6

7

8

9

10

11

11PCN509

ATRGM+

A SHUT

AHALF

CAPM+

REC(FWD)

TCM MGND

TC DGND

B SHUT

BHALF

NC

BTRGM+

10kR273

22kR272

4.7k

R29

4

3.3k

R29

7

4.7k

R29

6

47k

R29

3

3.3k

R29

5

2SB1132-T100-QRQ340

2SB1132-T100-QRQ341

2SB1132-T100-QRQ342

2.2k

R34

32.

2kR

347

2.2k

R34

02.

2kR

342

3.3k

R34

5

3.3k

R34

9

3.3k

R34

147

00p

C341

4700

pC3

40

1kR502

0R503

220R501

50V

22C501

0.1C503 TP502

100

R43

0

100

R42

9

100

R42

8

100

R42

1

100

R42

2

100

R42

3

100

R42

4

100

R42

5

100

R42

6

100

R42

7

100

R41

9

100R400

100

R40

1

100

R40

2

100

R40

3

100

R40

4

100

R40

5

100

R40

6

100

R40

710

kR

409

330k

R41

1

0R

413

10k

R41

7

220

R41

8

100k

R41

2

1kR

420 32

.768

kHz

X401

22p

C411

22p

C410

6.3V

2200

C416

0.1

C412

0.1

C417

100R432

100R433

100R436

100R438

100R439

100R440

100

R441

100R442

100R443

100R444

100R445

100R446

100R448

100R449

100R435

100

R47

8

100

R47

7

100

R47

510

kR

574

10k

R57

3

100

R46

8

100

R46

9

100

R47

0

100

R47

2

100

R47

3

100

R47

4

10V

100

C462

0.1

C464

10k

R46

3

10kR500

0.1C499

0.1C497

50V10

C498

4.7kR592

R593

1.5kR492R493

100R490

100R489

100R488

100R486

100R485

100R484

1kR497

RT1P137P-TP-1Q560

2.7k

R56

0

2.7k

R56

2

2.7k

R56

3

R56

11k

0.1

C567

6.3V

1000C

568

I OG

TA78033LSIC562

0.1C539

R58115k

R5311k

1

2

3

4

4PCN100

MIC GND

MIC SIG

A+9VHP DET

0.1C149

1

2

3

4

5

6

7

8

9

10

10PCN402

D-GND

TXD1

RTS1

NC

MCU VCC

CLK1

RXD1

CN VSS

RESET

GND

1

2

3

4

4PNO402

D-GND

D+3.3V

11C-CLK

11C-DATA

10kR508

10kR509

1

2

3

3PNO401

STBY RLY

D-GND

EVER+4V0.1C405

0.1

C502

JR13

1

TP501

6.3V

470C5

84

1

2

3

4

5

6

7

8

9

9PCN506

ST-L

ST+9V

ST-R

GND

TUNED

ST-CE

ST-DIN

ST-CLK

ST-DOUT

150kR548

150kR542

2.2k

R54

7

22k

R54

622k

R54

0

MC2

836

D40

2

MC2836D585

100R491

10kR586

10k

R537

100R447

100

R47

1

100

R46

7

R495

1k

100R431

100R434

MA1

11-T

XD

340

MA1

11-T

XD

342

MA111-TXD504

MA111-TXD501

MA1

11-T

XD

502

IOG

TA7804LSIC569

0.1

C614

MA1

11-T

XD

503

MA111-TXD593

10EDB40-TB3D592

10ED

B40-

TB3

D59

410ED

B40-

TB3

D59

0

10k

R66

3

1kR66

0

22kR661

10kR662 C

608

0.1

JW57

0

JW56

1

JW56

8

10kR541

10k

R67

2

2.2k

R67

3

10k

R34

410

kR

348

10k

R34

6

2SB1690TLQ604

100R487

R582

R532

10kR587

50V

4.7C

545

50V

4.7C5

44

5.6kR510

50V

10C51

1

RT1N430C-TP-1Q506

RT1P241C-TP-1Q544

RT1P241C-TP-1Q540

RT1N141C-TP-1Q344

RT1N141C-TP-1Q345

RT1N141C-TP-1Q343

RT1N141C-TP-1Q606

RT1N141C-TP-1Q561

Q6052SC2712-YG-TE85L

RT1N241C-TP-1Q501

RESET SWITCH

RT1P241C-TP-1Q583

STANDBY LED/FAN CONTROLSWITCH

1M

R595

50V

4.7

C540

50V

4.7C5

41

4.7k

R52

9

4.7k

R53

0

A1

A2

A5

A6

A7

A8

A9

A10

A11

A12

A14

A15

A16

A3

A4

A13

B2B1

A17

E2E3E4E5E6E7E8E9E10

E1

5MHzX402

5 4

321

BD49

29G

-TR

IC40

2

54

51

41

42

43

44

45

46

6866585756555453 65

82

12

9

32

33

34

31

73 74

80

79

81

6665

47

49

48

47

46

45

44

43

42

41

48

49

91

90

89

595251 70 71 7267 69

38

35

28 27 26 25

39

24 23 22 21 5 3 2 14718

95

87

86

85

84

85

86

87

77 78 75

37

32 32

53

3434

36

19 6

60

88

31

31

4040

3301

30

29

29

33

33

94

97

9

84

40

32

12

89

90

91

52

29

30

DVDD+3.3V REG

IC562

D+4V REG

IC569

LEVEL DETECT

IC402

SYSTEM CONTROL

IC401

(1/4)

2 1

TAPEMECHANISM

DECK

FM/AMTUNERPACK

BDRIVERBOARDCN701

TESTPIN

PINTEST

Q341,344CAPSTAN MOTOR DRIVE

Q342,345B TRIGGER DRIVE

Q340,343A TRIGGER DRIVE

CD MUTEQ540

LINE MUTEQ544

UNDER VOLTAGE DETECT SWITCHQ506

CD POWER CONTROL SWITCHQ560,561

USB POWER CONTROL SWITCHQ604-606

ANTENNA

FM 75COAXIAL

AM

TU901

BOARDMAIN

(2/4)1

BOARDMIC

CN902G

BOARDPRIMARY

CN1200J

BOARDMAIN

(2/4)2

MAIN BOARD (4/4)4

MAIN BOARD (3/4)3

R4931.5k4.7k

R593

1k4.7k

680

0

R532,582680

3

2

11

2

3

45 45

HCD-GTX88

HCD-GTX88

6-13. SCHEMATIC DIAGRAM MAIN SECTION (2/4) Refer to page 64 for IC Block Diagrams.

(Page 51)

(Page 46) (Page 47)

(Page 41) (Page 53)

(Page 44)

(Page 44)

12

K

3 4

A

6

D

9

J

F

E

2

C

51

G

I

138

B

157 141110

H

16

1BOARD(1/4)

MAIN

2BOARD(1/4)

MAIN

USB BOARD

DCN907

BD91 BOARD

ACN202

EFFECTOR BOARD

ECN1502

5MAIN BOARD (3/4)

6MAIN BOARD (4/4)

IC B/D IC B/D IC B/D

IC B/D

IC B/D

IC B/D

IC B/D

3.2 3.2 3.2 0 0 0 0

0 0 0 0 3.2 3.2 0 0.1 0 0.1 0 0

3.2 0 0 0 0 0 0.1 3.2 0.1 3.3 3.2 0.1 3.3 3.2

3.2 0 0 0 0 0 0

0 0

0.60.6

3.2

3.2(0)

00(9)

9 4.5 4.5 4.5 4.5 4.5 0(9) 0

4.5 4.5 4.5 4.5 4.5

9 4.4 4.5 4.4 4.5 4.4 0

4.5 4.4 4.5 4.5 4.5

0

3.2

4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 0

4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.5 4.2 9 0

4.5

0

0

4.54.5

4.1

0

4.5

0

4.1

3.2

04.5

4.5

4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6

4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 4.6 9 0 0 4.6

3.2

0

100k

RT1N141C-TP-1

G

L1

R1

L2

R2

J101

220p

C263

220p

C260

220p

C261

220p

C262

0R261

0R262

42 41 37383940

1 2 3 4 5

343536

6 7 8 9

30313233

10 11 12 13

29 28 27

14 15 16

26 25

17 18

24 23 22

19 20 21

M61

530F

P-D

60G

IC20

1

FR L

PFO

UT

FR L

PFIN

SL E

XTIN

SL V

OLI

N

SL L

PFO

UT

SL L

FPIN

SR E

XTIN

SR V

OLI

N

SR L

PFO

UT

SR L

PFIN

C VO

LIN

C LF

POU

T

C LP

FIN

LFE

VOLI

N

SW IN

VCC

DAT

A

CLO

CK

GN

D

TEST

AGCSW

LPF

OU

T

SW L

PFIN

SW O

UT

C O

UT

SR O

UT

SR B

B2

SR B

B1

SL O

UT

SL B

B2

SL B

B1

FR O

UT

FR IN

FL O

UT

REF

OU

T

REF

IN

L LP

FIN

L LP

FOU

T

R L

PFO

UT

R L

PFIN

FL L

PFIN

FL L

PFO

UT

R22

96.

8k

6.8k

R22

8

0.1C2310.

1C2

20

10V

100

C222 10V

100C223

0.1

C221

12k

R22

1 100k

R22

0

C230

0.1

50V

1C20

7

220p

C206

0.1

C205

220p

C203

1kR

204

1kR

205

10V

220

C204

0R

203

50V

10C202

10V

1000

C535

0.1C520

42 41 37383940

1 2 3 4 5

343536

6 7 8 9

30313233

10 11 12 13

29 28 27

14 15 16

26 25

17 18

24 23 22

19 20 21

M61

529F

P-D

60G

IC10

1

REF

MIC

INA1

INB1

INC1

IND

1

REC

A1/N

ex1

REC

B1

TMI1

TMO

1

TCA1

TCB1

TCC1

TOU

T1

VILI

N1

BB_A

1

BB_B

1

OU

T1

SAO

UT

VCC

DAT

ACL

OCK

GN

D

SWO

UT

OU

T2

BB_B

2

BB_A

2

VOLI

N2

TOU

T2

TCC2

TCB2

TCA2

TMO

2

TMI2

REC

B2

REC

A2/IN

ex2

IND

2

INC2

INB2

sony hcd-gtx88

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