Brother Fax 1010, 1020, 1030, 1170, 1270, 1570mc, MFC-1770, 1870mc, 1970mc Service Manual

7/30/2019 Brother Fax 1010, 1020, 1030, 1170, 1270, 1570mc, MFC-1770, 1870mc, 1970mc Service Manual

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FACSIMILE EQUIPMENT

SERVICE MANUAL

M ODEL: FAX1170/ 1270/ 1570M C

FAX1010/ 1020/ 1030

M FC1770/ 1870MC/ 1970M C


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Copyright Brother 1997

All rights reserved.

No part of this publication may be reproduced in anyform or by any means without permission in writingfrom the publisher.

Specifications are subject to change without notice.


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PREFACE

This publication is a Service Manual covering the specifications, construction, theory of opera-tion, and maintenance of the Brother facsimile equipment. It includes information required forfield troubleshooting and repairdisassembly, reassembly, and adjustmentso that servicepersonnel will be able to understand equipment function, to rapidly repair the equipment andorder any necessary spare parts.

To perform appropriate maintenance so that the facsimile equipment is always in best conditionfor the customer, the service personnel must adequately understand and apply this manual.

This manual is made up of six chapters and appendices.

CHAPTER I. GENERAL DESCRIPTION

CHAPTER II. INSTALLATION

CHAPTER III. THEORY OF OPERATION

CHAPTER IV. DISASSEMBLY/REASSEMBLY AND LUBRICATION

CHAPTER V. MAINTENANCE MODE

CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING

APPENDICES Circuit Diagrams

This manual describes the model and its versions to be destined for major countries. The specificationsand functions are subject to change depending upon each destination.


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CHAPTER I.

GENERAL DESCRIPTION


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CONTENTS

1. EQUIPMENT OUTLINE ................................................................................. I-1

1.1 External Appearance and Weight ........................................................... I-1

1.2 Components............................................................................................ I-1

2. SPECIFICATIONS .......................................................................................... I-2


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I 1

1. EQUIPMENT OUTLINE

1.1 External Appearance and Weight

The figure below shows the equipment appearance and approximate dimensions.

12

ABC

Hook

Hold

Function Tel/IndexResolution ModeSuper

O. ScanHelp

Redial/Pause

SpeedDial

3

DEF01

0203

0413

1415

16

0506

070817

1819

20

0910

111221

2223

24

4

GHI

5

JKL

6

MNO

7

PRS

8

TUV

9

WXYZ

* 0 # Shift

SetClear

Copy

Enlarge/Reduce

Sort

StopStart

IntelliFAX-1270PLAINPAPERFACSIMILE

A48.5"

A48.5"

(Unit: mm)

213 (H)

385 (D)* 317 mm for FAX1010 which has

no handset mount385.5 (W)*

Weight: Machine proper FAX1010: Approx. 5.0 kg (excluding a ribbon cartridge)Other models: Approx. 5.2 kg (excluding a ribbon cartridge)

In package FAX1010: Approx. 8.7 kgOther models: Approx. 8.9 kg

1.2 Components

The equipment consists of the following major components:

Recording paper cover ASSY

Control panelASSY

Inner cover

Recording headASSY

Main frame

Handset(Not provided onthe FAX1010)

Main cover

CIS unit

Documentejection tray

Bottom plate

Modular PCB

Power supply PCB

NCU PCB

Main PCB

Handset mount(Not provided onthe FAX1010)

Side cover(Provided only onthe FAX1010)


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I 2

2. SPECIFICATIONS

FAX Retrieval No Yes Yes

PCI (Missing link) Ready Ready Ready

Message Center No No Yes

Caller ID Yes Yes Yes

Fax-/Voice-on-demand No No Voice-on-demand

Mail Box No No Yes

Remote Control Yes Yes Yes

Toll Saver No No Yes

Memo/2-Way Recording No No Yes

Auto Reduction Yes Yes Yes

Confidential Mailbox No No No

Optional Memory No No No

Model FAX1170 FAX1270 FAX1570MC

Color Gray (1395) White (1397) White (1397)

Modem Speed 9600 bps 9600 bps 14400 bps

CCITT Group G3 G3 G3

Coding Method MH MH MHTransmission Speed 15 sec. 15 sec. 9 sec.

Input/Output Width 8.5"/8.5" 8.5"/8.5" 8.5"/8.5"

ADF Capacity (pages) 20 20 20

Recording Paper Loadable 200 sheets 200 sheets 200 sheets

Paper Size Letter/Legal/A4 Letter/Legal/A4 Letter/Legal/A4

Ribbon Life (Letter-size print) 450 pages 450 pages 450 pages

Handset Yes Yes Yes

LCD Size 16 x 1 16 x 1 16 x 1

On-screen Programming Yes Yes Yes

Gray Scale 64 by Dithered 64 by Dithered 64 by E/D

Smoothing Yes Yes Yes

One-touch Dial 12 x 2 12 x 2 12 x 2

Speed Dial 26 36 100Telephone Index Yes Yes Yes

Multi-resolution Transmission Yes Yes Yes

FAX/TEL Switch Yes Yes Yes

Distinctive Ringing Yes Yes Yes

Next Fax-reservation Yes Yes Yes

Help Yes Yes Yes

TAD Interface Yes Yes Yes

Coverpage Yes, Super Yes, Super Yes, Super

Polling Type Sim/Del/Seq Sim/Del/Seq Sim/Del/Seq

Receive Password (password plus) Yes Yes Yes

Delayed Transmission 3, timers 3, timers 3, timers

Call Reservation Yes Yes Yes

Call-back Message Yes Yes YesSpeaker Phone Monitor Monitor Yes, Full-duplex

Activity Report Yes Yes Yes

Transmission Verification Report Yes Yes Yes

Page Memory 512 KB (20 pages) 512 KB (20 pages) 1 MB (50 pages)

Out-of-paper Reception Yes Yes Yes

Quick Scan Yes Yes Yes

Super Quick Scan No No No

Broadcasting Yes Yes Yes

ECM Yes Yes Yes

Multi-transmission Yes Yes Yes

Multi-copying w/Sorting Yes Yes Yes

Enlargement/Reduction Ratio Yes (50-150%) Yes (50-150%) Yes (50-150%)

TAD Type No No DSP

OGM No No Yes

ICM Recording Time No No Yes, 30 min.

FAX Forwarding/Paging No Yes Yes


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I 3

FAX Retrieval Yes Yes Yes

PCI (Missing link) Ready Ready Ready

Message Center No No Yes

Caller ID UK, Sw., Holland (Ready for France) UK, Sw., Holland (Ready for France) UK, Sw., Holland (Ready for France)

Fax-/Voice-on-demand No No Voice-on-demand

Mail Box No No Yes, 5


Toll Saver No No Yes

Memo/2-Way Recording No No Yes




Model FAX1010 FAX1020 FAX1030

Color White (1138) White (1138) White (1138)




Input/Output Width A4/A4 A4/A4 A4/A4




Ribbon Life (A4-size print) 420 pages 420 pages 420 pages

Handset No Yes Yes

LCD Size 16 x 1 16 x 1 16 x 1





Speed Dial 36 36 100Telephone Index Yes (Not Super) Yes (Not Super) Yes (Not Super)





Help Yes, Simple Yes, Simple Yes, Simple



Polling Type Std/Sec/Del/Seq Std/Sec/Del/Seq Std/Sec/Del/Seq




Call-back Message Yes Yes YesSpeaker Phone Monitor Monitor Yes, Full-duplex




Out-of-paper Reception Yes (20 pages) Yes (20 pages) Yes (50 pages)

Quick Scan Yes (18 pages) Yes (18 pages) Yes (18 pages)


Broadcasting Yes, 60 locations Yes, 60 locations Yes, 124 locations

ECM Yes Yes Yes




TAD Type No No DSP

OGM No No Yes

ICM Recording Time No No Yes, 30 min.

FAX Forwarding/Paging Yes/No Yes/No Yes


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I 4

FAX Retrieval Yes Yes Yes

PCI (Missing link) Included (MFL3) Included (MFL3) Included (MFL3)

Message Center No Yes Yes

Caller ID Yes Yes Yes

Fax-/Voice-on-demand No Voice-on-demand Voice-on-demand

Mail Box No Yes Yes


Toll Saver No Yes Yes

Memo/2-Way Recording No Yes Yes




Model MFC1770 MFC1870MC MFC1970MC

Color White (1138) White (1138) White (1138)




Input/Output Width 8.5"/8.5" 8.5"/8.5" 8.5"/8.5"




Ribbon Life (Letter-size print) 450 pages 450 pages 450 pages

Handset Yes Yes Yes

LCD Size 16 x 1 16 x 1 16 x 1





Speed Dial 36 36 100Telephone Index Yes Yes Yes





Help Yes Yes Yes



Polling Type Sim/Del/Seq Sim/Del/Seq Sim/Del/Seq




Call-back Message Yes Yes YesSpeaker Phone Monitor Yes, Full-duplex Yes, Full-duplex




Out-of-paper Reception Yes Yes Yes

Quick Scan Yes Yes Yes


Broadcasting Yes Yes Yes

ECM Yes Yes Yes




TAD Type No DSP DSP

OGM No Yes Yes

ICM Recording Time No Yes, 15 min. Yes, 30 min.

FAX Forwarding/Paging Yes Yes Yes


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CHAPTER II.

INSTALLATION


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CHAPTER III.

THEORY OF OPERATION


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CONTENTS

1. OVERVIEW..................................................................................................... III-1

1.1 Functional Block Diagram ...................................................................... III-1

2. MECHANISMS................................................................................................ III-2

2.1 Transmitting Mechanism (Feeding and scanning documents) ............... III-2

2.1.1 Automatic document feeder (ADF).................................................. III-2

2.1.2 Scanner ........................................................................................... III-3

2.2 Receiving Mechanism (Feeding paper and printing data) ...................... III-4

2.3 Power Transmission Mechanism ........................................................... III-5

2.3.1 Structure of the gear train ............................................................... III-5

2.3.2 Description of planetary gear system .............................................. III-6

2.3.3 Power transmission for four operation modes ................................. III-7

[ 1 ] Scanning mode (Solenoid: OFF, Motor rotation : Reverse)...................... III-8

[ 2 ] Paper feeding/ejection mode (Solenoid: ON, Motor rotation : Reverse) III-9

[ 3 ] Recording mode (Solenoid: OFF, Motor rotation : Forward) .................... III-10

[ 4 ] Copying mode (Solenoid: ON, Motor rotation : Forward) ......................... III-12

2.3.4 Power transmission route ............................................................... III-14

2.4 Sensors and Actuators ........................................................................... III-16

3. CONTROL ELECTRONICS........................................................................... III-19

3.1 Configuration........................................................................................... III-19

3.2 Main PCB................................................................................................ III-20

3.3 NCU PCB................................................................................................ III-27

3.4 Control Panel PCB ................................................................................. III-29

3.5 Power Supply PCB ................................................................................ III-30


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III 1

1. OVERVIEW

1.1 Functional Block Diagram

LCD

Control Panel

Main frame

Ribbon sensor

Recorder

Recording head

Ribbon cartridge

Motor

Scanner

To PC

CIS unit

Modular PCB(Cover sensor)

Main PCB(Document frontand rear sensors)

NCU PCB Line

ACPower supplyPCB

Sensor PCB(Paper-edgesensor and paperejection sensor)

Handset

Hook switchsensor

Documentejection tray


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III 2

2. MECHANISMS

The equipment is classified into the following mechanisms:

s Transmitting Mechanism Feeding and scanning documents

s Receiving Mechanism Feeding paper and printing data

s Power Transmission Mechanism Switching the power transmission route

s Sensors and Actuators

2.1 Transmitting Mechanism (Feeding and scanning documents)

The transmitting mechanism consists of the document stacker, automatic document feeder(ADF), document feeding related rollers, scanner, and document sensors. (For details aboutthe sensors, refer to Section 2.4.)

For the drive power source, refer to Section 2.3.

2.1.1 Automatic document feeder (ADF)

If the operator sets documents on the stacker and starts the transmitting operation, the ADF

(consisting of the separation roller and ADF parts) feeds those documents into the equip-ment, starting from the bottom sheet to the top, page by page. Each document advances tothe scanner, and then it is fed with the white pressure roller and document ejection roller.

Document

Documentstacker

Scanner(CIS unit)

Pressure roller,front

White pressureroller

Pressure roller,rear

ADF parts

Separation roller

Documentejection roller

(Front)

Documentsupport


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III 3

2.1.2 Scanner

The scanner uses a contact image sensor (CIS) unit which consists of an LED array illumi-nating documents, a self-focus lens array collecting the reflected light, a CIS PCB carrying

out photoelectric conversion to output picture element data, and a cover glass on which adocument advances. When the document passes between the white pressure roller and thecover glass, it is scanned.


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III 4

2.2 Receiving Mechanism (Feeding paper and printing data)

The receiving mechanism consists of the recording paper cover ASSY, paper feed rollerASSY, platen, thermal recording head, paper ejection roller, and sensors. (For details about

the sensors, refer to Section 2.4.)

STEP 1: In the paper feeding mode

If the equipment receives data, the control electronics activates the solenoid and rotates themotor counterclockwise to drive the paper feed roller (and paper ejection roller). This pulls ina sheet of paper and feeds it until its leading edge reaches the point just before the printingposition.

STEP 2: In the recording (platen drive & ribbon take-up) mode

The control electronics deactivates the solenoid and rotates the motor clockwise to drive theplaten gear and the ribbon take-up gear as well as the paper ejection roller. This feeds thepaper up to the printing position where the thermal recording head prints, as well as feedingthe thermal ink ribbon.

STEP 3: In the paper ejecting mode

The same operation as for STEP 1 takes place so as to eject the paper.

Paper

Paper feed roller ASSY

Paper ejection roller

Platen

Chute ASSY

Thermal ink ribbon

Recording head

(Front)

Recordingpaper coverASSY


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III 5

2.3 Power Transmission Mechanism

The equipment has a single drive motor whose power transmission route can be switched bythe planetary gear systems and the solenoid. This switching allows the equipment to func-

tion in four operation modes (scanning, paper feeding/ejecting, recording, and copyingmodes). For the details about the planetary gear systems, refer to Subsection 2.3.2.

2.3.1 Structure of the gear train

At the left side of the equipment, the rotational torque of the motor on the main frame istransmitted to the gears on the main frame and then to the gears on the platen frame. Thesegears drive the document feeding/ejecting related rollers, paper feeding/ejecting related roll-ers, and the platen.

If the platen gear ("a" in the figure below) on the left end of the platen shaft rotates, the gear33RB ("b") on the right end also rotates. This way, the rotational torque is transmitted to thegears on the right side of the equipment.

At the right side of the equipment, the rotational torque is further transmitted via the friction

torque transmission ASSY to the ribbon drive gear ("e") which drives the ribbon take-up gearin the ribbon cartridge.

Gear Train

: Gears on the main frame

: Gears on the platen frame

Main frameQ (Gear 33)

P (Gear 18)

B (Sun gear 20/90)

(Front)

F (Separation roller gear)

D (Gear 33)

C (Planet gear 20B of Arm B ASSY)

M (Gear 39)

Z (Gear 33/45)

UV

T (Paper feed roller gear, Gear 55)

Platen frame

G H JE (Gear20/40)

K (Documentejection rollergear)

I (White pressureroller gear)

R (Sun gear39/24)

N (Sun gear36/27)

Y (Planet gear 44 ofArm C ASSY)

O (Gear 39)

A (Motor gear)L (Planet gear 20A of Arm A ASSY)

Clutch lever (Gears 14/20)

(Gears 18/41)

Right side

Left side

Main frame

Platen frame

e (Gear 46 of Friction torquetransmission ASSY)

d (Gear 18)

c (Gear 20/40)

b (Gear 33RB)

e (Ribbon drive gear, Gear 24)

a (Platen gear, Gear 23)

X (Paper ejection roller gear, Gear 40)W (Clutch gear ASSY)

S (Planet gear34 of Arm PASSY)


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III 6

2.3.2 Description of planetary gear system

The equipment uses the following three planetary gear systems:

- Sun gear 20/90 ("B" in the figure given on the previous page) and its planet gears

- Sun gear 36/27 ("N") and its planet gear

- Sun gear 39/24 ("R") and its planet gear

This section describes the planetary gear system of the sun gear 20/90 ("B"). It consists ofthe sun gear 20/90, two planet gears 20, arm A, and arm B, as shown below.

Planetary Gear System

If the motor rotates, the sun gear 20/90 rotates so that the rotational torque is transmitted tothe engagement between the sun gear and the planet gears 20. Since the arms and planetgears are so designed that the moment of the arms is less than that of the planet gears, thearms turn around the center shaft in the same direction as the sun gear 20/90.

If the planet gear(s) becomes engaged with any other gear so that the arm cannot turn fur-thermore, the rotational torque of the sun gear 20/90 is transmitted to that planet gear. Ac-cordingly, the planet gear starts rotation in the opposite direction of the sun gear 20/90.

Arm A

Motor gear

Arm B

Planet gear 20B

Sun gear 20/90

Planet gear 20A


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III 7

2.3.3 Power transmission for four operation modes

Depending upon the solenoid ON/OFF state and the motor rotation direction, the planetarygear train switches the power transmission route for the four operation modes.

Solenoid ON/OFF state Motor rotation direction

Solenoid: OFF

Arm A

ForwardReversePlanet gear 20B

Planet gear20A

Sun gear20/90

Arm B

Solenoid

Clutch lever

Spring

Cutoutx (engagedwith the stopper of

arm A)

Solenoid: ON

Clutch lever

Spring

Cutoutx (engagedwith the stopper ofarm A)

Solenoid

Sectiony (to block thestoppper of arm B)

Sectiony (to block thestoppper of arm B)

Motorgear

Stopperof arm A

Stopper ofarm B


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III 8

[ 1 ] Scanning mode (Solenoid: OFF, Motor rotation: Reverse)

In the scanning mode, the control electronics deactivates the solenoid. When the motor ro-tates in the reverse direction, the clutch lever turns counterclockwise with the spring so that

its cutout x becomes engaged with the stopper of arm A. Once arm A is locked, the planetgear 20A ("L") will not be engaged with any other gear but simply idle.

The motor's rotational torque turns the sun gear 20/90 ("B") clockwise so that the planet gear20B ("C") transmits the torque to the separation roller gear ("F"), white pressure roller gear("I") and document ejection roller gear ("K") via the several gears.

Arm A Locked by Cutout xxxxx of Clutch Lever

E

GH

J

D

L


F (Separationroller gear)B (Sun gear 20/90)

C (Planet gear 20B)

(Front)

SolenoidA (Motor gear)

Clutch leverK (Documentejection rollergear)

Active Gears

L (Planet gear 20A)

Solenoid

Clutch lever

Stopper of arm A

Cutoutx of clutch lever

C (Planet gear 20B)

B (Sun gear 20/90)


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III 9

[ 2 ] Paper feeding/ejecting mode (Solenoid: ON, Motor rotation: Reverse)

In the paper feeding/ejecting mode, the control electronics activates the solenoid to releasethe stopper of arm A. When the motor rotates in the reverse direction, the sun gear 20/90

("B") rotates clockwise so that the planet gear 20A ("L") transmits the torque via the gear 39("M") and other gears to the paper feed roller gear ("T") and paper ejection roller gear ("X").

Since the stopper of arm B is blocked by the section y of the clutch lever, the planet gear20B ("C") is merely idle without engaging with any other gear.

(Front)

Arm B Blocked by Section y of Clutch Lever

Q P

O

U V

W

N

M

C

Y

L (Planet gear 20A) Solenoid

A (Motor gear)

Clutch leverR (Sun gear 39/24)

S (Planetgear 34)

B (Sun gear 20/90)

X (Paper ejection roller gear)

T (Paper feed roller gear)

Active Gears

Solenoid

L (Planet gear 20A)

B (Sun gear 20/90)

C (Planet gear 20B)

Stopper of arm A

Clutch lever

Sectiony of clutch lever

Stopper of arm B


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III 10

[ 3 ] Recording mode (Solenoid: OFF, Motor rotation: Forward)

In the recording mode, the control electronics deactivates the solenoid. When the motor ro-tates in the forward direction, the clutch lever turns counterclockwise with the spring so that

its cutout x becomes engaged with the stopper of arm A. Once arm A is locked, the planetgear 20A ("L") will not be engaged with any other gear but simply idle.

The motor's rotational torque turns the sun gear 20/90 ("B") counterclockwise so that theplanet gear 20B ("C") transmits the torque via the gear 39 ("M") and other gears to the platengear ("a") as well as the paper ejection roller gear ("X").

The platen advances recording paper and its paper movement rotates the paper feed roller.Consequently, the paper feed roller shaft rotates faster than the paper feed roller gear ("T").

If the platen gear ("a" in the figure below) on the left end of the platen shaft rotates, the gear33RB ("b") on the right end also rotates so as to drive the friction torque transmission ASSYand ribbon drive gear ("e") that rotates the ribbon take-up gear ("f") in the ribbon cartridge, asshown on the next page.

Arm A Locked by Cutout xxxxx of Clutch Lever

C (Planet gear 20B)

B (Sun gear 20/90)

L (Planet gear 20A)

Solenoid

Cutoutx of clutch lever

Clutch lever

Stopper of arm A

Active Gears on the Left Side

U V

W

Q

P

O

Z

M

L

B (Sun gear 20/90)

S (Planetgear 34) R (Sun gear 39/24)

C (Planet gear 20B)

a (Platen gear)


T (Paper feed roller gear)

Y (Planet gear 44)

N (Sun gear 36/27)

A (Motor gear)

Clutch leverSolenoid

(Front)


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III 11

Active Gears on the Right Side

c

d

Platen frame

b (Gear 33RB)

Main frame

f (Ribbon take-up gearin the ribbon cartridge)

(Front)

e

Ribbondrive gear(Gear 24)

Friction torquetransmissionASSY (Gear 46)


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III 12

[ 4 ] Copying mode (Solenoid: ON, Motor rotation: Forward)

The control electronics activates the solenoid to release the stopper of arm A from the clutchlever. When the motor rotates in the forward direction, the sun gear 20/90 ("B") rotates

counterclockwise so that the planet gear 20A ("L") transmits the torque to the documentscanner mechanism (e.g., the separation roller gear ("F"), white pressure roller gear ("I") anddocument ejection roller gear ("K")) and the planet gear 20B ("C") transmits the torque to therecording mechanism (e.g., the platen gear ("a"), paper feed roller gear ("T"), and paperejection roller gear ("X")).

If the platen gear ("a" in the figure below) on the left end of the platen shaft rotates, the gear33RB ("b") on the right end also rotates so as to drive the friction torque transmission ASSYand ribbon drive gear ("e") that rotates the ribbon take-up gear ("f") in the ribbon cartridge, asshown on the next page.

Active Gears on the Left Side

U V

W

Q

P

O

Z

M LE

GH

J

a

Y (Planet gear 44)

N (Sun gear 36/27)

S (Planetgear 34)

(Front)

K (Documentejection rollergear)

Clutch lever

A (Motor gear)

L (Planet gear 20A)

B (Sun gear20/90)

Solenoid

R (Sun gear 39/24)


T (Paper feed roller gear) a (Platen gear)

C (Planet gear 20B)

F (Separation roller gear)


Arm A Released from Coutout XXXXX of Clutch Lever

C (Planet gear 20B)

B (Sun gear 20/90)

L (Planet gear 20A)

Solenoid

Stopper of arm B

Stopper of arm A

Cutoutx

of clutch lever

Clutch lever


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III 13

Active Gears on the Right Side

c

d

Platen frame

b (Gear 33RB)

Main frame

f (Ribbon take-up gearin the ribbon cartridge)

(Front)

Friction torquetransmissionASSY (Gear 46)

e

Ribbondrive gear(Gear 24)


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III 14

2.3.4 Power transmission route

Rotation of the motor gear is transmitted as shown below.

b

c

de

f

Gears on the Right Side

A: Motor gearB: Sun gear 20/90C: Planet gear 20BD: Gear 33E: Gear 20/40F: Separation roller gearG: Gear 14/20H: Gear 14/20I: White pressure roller gearJ: Gear 14/20K: Document ejection roller gearL: Planet gear 20AM: Gear 39

N: Sun gear 36/27O: Gear 39P: Gear 18

Q: Gear 33R: Sun gear 39/24S: Planet gear 34T: Paper feed roller gearU: Gear 18/41V: Gear 18/41W: Clutch gearX: Paper ejection roller gear, Gear 40Y: Planet gear 44Z: Gear 33/45a: Platen gear, Gear 23b: Gear 33RBc: Gear 20/40

d: Gear 18e: Friction torque transmission ASSY (Gear 46)

and ribbon drive gear (Gear 24)f: Ribbon take-up gear in the ribbon cartridge

[ 1 ] Scanning Mode (Solenoid: OFF, Motor rotation: reverse)

A B C D E F G HI (White pressure roller)

L (Idling)J K

[ 2 ] Paper Feeding/Ejecting Mode (Solenoid: ON, Motor rotation: reverse)

C (Idling)

A B L M N O P Q R S T U VW X

Y (Idling)

(Documentejection roller)

(Separationroller)

(Motor)

(Motor) (Paper feedroller)

(Paper ejectionroller)

Gears on the Left Side

a

O

Y

B

LA

E

G

J

U

S

P

Q

R

TV

X

W

Z

N

M

C

D F

K

I

H


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III 15

[ 3 ] Recording Mode (Solenoid: OFF, Motor rotation: forward)

A B C M NY Z a (Platen) b c d e f (Ribbon take-up gear)

L (Idling)O P Q R S W X (Paper ejection roller)

V U T

[ 4 ] Copying Mode (Solenoid: ON, Motor rotation: forward)

Y Z a (Platen) b c d e f (Ribbon take-up gear)C M N

O P Q R S W X (Paper ejection roller)A BL E F G H I (White pressure roller) V U T

J K

(Motor)

(Motor)

(Separationroller)

(Documentejection roller)

(Paper feedroller)

(Paper feedroller, Idling)


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III 16

2.4 Sensors and Actuators

This equipment has four photosensors and three mechanical switches (two for the FAX1010)as described below.

Sensor name Type Located on

Document front sensor Photosensor (PH1) Main PCB

Document rear sensor Photosensor (PH2) Main PCB

Paper ejection sensor Photosensor (PH1) Sensor PCB

Paper-edge sensor Photosensor (PH2) Sensor PCB

Cover sensor Mechanical switch (SW1) Modular PCB

Ribbon sensor Mechanical switch (SW1) Recording head

Hook switch sensor* Mechanical switch (SW1) Hook switch PCB

Document front sensor which detects the presence of documents.

Document rear sensor which detects the leading and trailing edges of pages to tell thecontrol circuitry when the leading edge of a new page has reached the starting positionand when the scan for that page is over.

Paper ejection sensor which detects whether a paper jam has occurred.

Paper-edge sensor which detects the leading and trailing edges of paper and the pres-ence of paper as well as detecting whether the paper front cover is closed.

These photosensors are of a reflection type consisting of a light-emitting diode and a light-sensitive transistor. Each of them has an actuator separately arranged (see the next page),

except that the paper-edge sensor has two actuators for sensing the paper and the paperfront cover. When an actuator is not activated, its white end lies in the path of light issuedfrom the light-emitting diode and reflects its light so that the reflected light enters the light-sensitive transistor. If a document or paper comes in so as to activate the actuator, theactuator's white end goes out of the light path and no reflected light enters the light-sensitivetransistor. This way, the sensor detects the presence of documents or paper.

Cover sensor which detects whether the recording paper cover ASSY is closed.

Ribbon sensor which detects whether the ink ribbon is loaded.

Hook switch sensor* which detects whether the handset is placed on the handset mount.

The cover sensor has an actuator separately arranged (see page III-18). If the actuator is

activated, its lower end releases the cover sensor lever so that the sensor signals the detec-tion.

* Not provided on the FAX1010

Light-

sensitivetransistor

Light-

emittingdiode

GlassApprox. 0.7 mm

Path of actuator's end


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III 17

Document rear sensor actuatorDocument rear sensor

Main PCB

Paper-edge sensor actuator

Paper-edge sensor

Paper ejection sensor

Paper ejection sensoractuator

Ribbon sensor actuator

Ribbon sensor

Recording head

Sensor PCB

(Front)

(Front)

Document front sensorDocument front sensor actuator

Front coversensing actuator

Location of Sensors and Actuators (1)


30/193

III 18

Cover sensor actuator

Modular PCBCover sensor lever

Cover sensor

Location of Sensors and Actuators (2)

Handset mount*

* Not provided on the FAX1010

** Not provided on the FAX1010 or those versions equipped with a Binatone handset

Hook switch sensor actuator**

Hook switch sensor**

Hook switch PCB**


31/193

III 19

3. CONTROL ELECTRONICS

3.1 Configuration

The hardware configuration of the facsimile equipment is shown below.

Line

Externaltelephone

(Note)

P2

8-pinPC I/F ModularPCB

Speaker 2-pin

6-pin

2-pin

11-pin

Motor

Solenoid

ASIC

NCU PCB

(Note)

12-pin: U.S.A. versions18-pin: European versions

2-pin 2-pin

4-pin

5-pin

Controlpanel PCB

COG

14-pin

7-pin CIS unit 14-pin

FPC key

Micro-phone

5-pin 2-pin 4-pin 2-pin

2-pin

SensorPCB

HookswitchPCB

4-pin

Ni-MHbattery

*3 *4

Recording head*5

Power supply PCB

Main PCB*1

*2

Configuration of Facsimile Equipment

*1 On the main PCB are these sensors:

Document front sensor (PH1)

Document rear sensor (PH2)

*2 On the modular PCB is the cover sensor.

*3 On the sensor PCB are these sensors:

Paper ejection sensor (PH1)

Paper-edge sensor (PH2)

*4 On the hook switch PCB* is the hook switch sensor (SW1).

*5 On the recording head is the ribbon sensor (SW1).

(Only on the FAX1570MC/1030/MFC1870MC/1970MC)

Handset*

*

* Not provided onthe FAX1010


32/193

III 20

3.2 Main PCB

The main PCB, which is the nucleus controlling the entire operation of the equipment, con-sists of a FAX engine (ASIC), memories, MODEM, motor drive circuitry, sensor detection cir-

cuitry, and analog circuits for scanning, recording, and power transmission shifting.

ROM

E2PROM

FAXengine

(ASIC)Motordriver

Sensors

Recording head

Control panel

Motor

CIS

DRAM

Speaker

Powersupply

NCU

ModularPCB (forPC I/F)

Hook

switchsensor*

Sensors

E2PROM: Electrically Erasable Programmable Read-only MemoryDRAM: Dynamic Random Access Memory

Microphone

Ni-MH battery

Block Diagram of Main PCB

On the following pages, the main PCB circuit diagrams are described on the basis of theFAX1570MC/1030/MFC1870MC/1970MC.

** Not provided on theFAX1010 or thoseversions equippedwith a Binatonehandset


33/193

III 21

P I O 1

S E O N ( O D )

S P S L ( S M C )

C I

T L O F

H O O K

S T D

C M L

D P S

P L S

L N C R ( C O M P )

T E L

R S T

S O L ( O D )

S E N 2

S E N 3

S E N 4

S E N 5

S E N 6

S E N 7

S E N 8

E X T L

X T L

I O R D

I O W E

P I O 2

E I T 1

A V D D

C P 1 I

C P 3 I

C P 4 I

C P N N

R D A 6

R E F H

R E F L

A V D D

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

V D D

V D D

V D D

V D D

V D D

V D D

P I O 5

E 2 C S

R D A T

T G

D I F

C L 1

C L 2

R B

R D A 6 1

S T 1

S T 2

H D C

D I N

D O U T

R M 1

C T X D

L I G T ( P W M )

P I O 6

P I O 4 ( O D )

P I O 3 ( S R A M )

P 0 3 ( O D )

P C L K

S D O U T

R A S 0

C A S

R M R D

R M W E

R O M C

C R X D

C K S

T X D

R X D

C T S

P W O N

R T C C O N

R V D D

D M T

D M K

A D M D

A A M D

C 0

C 1

C 2

A M U T

D 0

D 1

D 2

D 3

D 4

D 5

D 6

D 7

V S S

V S S

V S S

V S S

V S S

V S S

V S S

V S S

V S S

# 9

T 7 D 6 0

4 4

1 4 3

1 4 1

7 0

7 5

1 2 4

1 2 3

1 2 2

1 7 7

1 7 6

1 7 5

1 2 1

1 8 4

1 6 6

1 6 7

1 8 3

8 8

1 9 3

1 9 4

1 9 2

1 9 5

1 8 7

1 8 8

1 8 9

5 7

1 9 1

8 0

1 0 7

8 2

8 3

1 8

1 7

2 0 8

2 3

2 0

2 0 4

2 6

2 0 3

1 0 3

6 9

4 1

1 0 8

1 8 6

9 2

9 1

9 4

9 0

1 0 2

1 0 4

1 0 1

9 8

9 5

1 0 0

5 2

1 8 2

5 1

5 6

5 5

5 4

5 3

5 0

4 9

4 8

5 8

1 5

3 8

6 0

8 1

9 6

1 0 5

1 1 9

1 4 2

1 0

4 3

9 7

1 1 4

1 3 2

2 0 1

1 2 7

1 2 8

1 2 9

1 3 0

1 3 1

1 3 3

1 3 4

1 3 5

1 3

1 2

1 1

1 6

1 4

6

5

1 3 6

1 3 7

1 3 8

1 3 9

1 4 8

1 4 9

1 5 0

1 5 1

1 5 2

1 5 3

1 5 4

1 5 5

1 5 7

1 5 8

1 5 9

1 6 0

1 6 1

1 6 2

1 6 3

4 5

4 6

1 6 9

1 7 1

1 7 0

1 6 8

1 7 2

1 7 3

1 7 4

1 2 5

1 2 6

1 4 5

1 4 6

1 4 0

1 4 4

6 4

6 1

2 0 2

1 9 9

1 9 6

1 9 7

1 9 8

C T S E L 5 3 A , 5 3 B

A B U S 2 6 B , 3 4 D

T B U S 4 8 A , 5 8 D

G N D

G N D

G N D

A M U T E

D A 1

D A 2

D A 3

D A 4

D A 5

D A 6

D A 7

D A 8

D A 9

D 0 0

D 0 1

D 0 2

D 0 3

D 0 4

D 0 5

D 0 6

D 0 7

T S T B

I N T

B S R Q

B S A K

N M I

W A I T

R F S H

M 1

I O R Q

M R E Q

R D

WR

C K 1 6

C K 8 M

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

A 1 2

A 1 3

A 1 4

A 1 5

M A 1 6

M A 1 7

M A 1 8

T S T A

R V D D

2 7 B R M R D

4 6 D R N G L

3 3 C C L M P

3 4 C , 3 2 A T G

3 2 E S T 1

3 2 E S T 2

3 3 A L I G T

E 5 V

3 3 B V I D

3 3 D C P 3 I

4 3 A T E L L

1 5 B P C L K

3 2 F R I B O N

4 2 F T L O F 2

3 7 B F S E N

1 7 B C S E N

4 2 F E A T

4 2 D O T O

5 3 B C L S E L

2 5 B E P C K

S P O N4 0

E 1 C S1 0 6

4 2 F C I

4 2 F T L O F

X T 1

C S A 1 6 M X

X T 3

C - 0 0 1 R

C L C I

O D P I O 0

O D P I O 1

O D P I O 2

F C S 2

1 7 8

1 7 9

1 8 0

3 7

R S T L 1 4 A

C L R S T

C L C K

C L T X S

2 3 F S O L R M 32 8

R M 42 9

3 9R I N G

R 9 1

0

C 7 5

C C 1 0 P

C 7 4

C C 1 2 P

R 8 0 1 M

R 8 2

0

C 6 2

C C 3 0 P

L 4

0

C 6 0

C C 1 0 4

C 4 3

C C 1 0 4

C 5 1

C C 1 0 4

C 5 9

C C 1 0 4

8 9P O 1

V D D

1 4 7

V D D1 6 5

4 7A G N D V S S

1 5 6

P O 2

M O N M D C K

M I O 3

M I O 1 1

M V S S

D A 0

C 1

C 2

A A P D M D

A D P D M D

D P D M C K

D P D M D T

M I O 0 ( P W M )

M I O 1 ( P W M )

1 8 5

7 6

7 7

7 8

7 9

3 0

3 1

3 2

1 0 9

1 1 0

1 1 1

1 1 2

1 1 3

1 1 5

1 1 6

1 1 7

1 1 8

1 2 0

C 7 7

C C 1 0 4

C 7 6

C C 1 0 4

P A N E L

P 1 1

B 5 B - P H

W H I T E

G N D

+ 5 V

G N D

G N D

5

1

3

2

4

R 9 4 7 0

C 1 5

C 1 0 1

C 1 6

C C 1 0 4

# 9

T 7 D 6 0

E 0 V

C 0

R E X T

4

6 2

D A B U S

2 6 B , 2 6 E

D A 0

D A 4

D A 5

D A 6

D A 7

D A 8

D A 9

2 0 7

C 0 V

X T 2

D 5 7 . 6 D 6

R 6 1

2 2 0

C 4 2

C C 5 P

C 4 1

C C 5 P

M T X L2 0 6

M E X T L

G N D

P 7 *

S H O R T - 2

+ 5 B

G N D

Q 6

R H 5 V A 4 3

V C C

O U T

G N D

R S T L 1 6 A , 4 7 B , 1 4 B , 5 7 E

D A 3

D A 2

D A 1

R 9 0

1 . 5 K

C 6 9

C C 1 0 4

C 7 2

C C 1 0 4

C 7 3

C C 1 0 4

9 3

2 3 C M T I 0

D B U S 2 5 E , 3 6 D

L 5 V

R 7 0

R 6 6

2 0 0

P B U S

1 7 B

C 6 5

C C 1 0 4

E 5 V

R 8

*

+ 5 V

G N D

4 3 B T A D H

4 3 E P L S

G N D

C 6 1

C C 3 0 P

3 7 B R S E N

G N D

E 0 V

3 3 C C P WM

3 2 F L A T C

3 8 E P W O N

1 5 B S D I N

3 6 C R D A T

2 7R M 2

R 7 4 7 0

C 1 3

C 1 0 1

C 6 8

*

4 2 F D A S T

3 4 C S M C

R X T6 3

4 3 D D A R E C

R 8 7 1 0 K

R 6 8 1 0 k 1 9M I O 2 ( P W M )

3 8 C R E A R

5 2 C C L B S Y

2 3 E M T V R

1 7 C H O O K

R 7 8 *

R 1 3 1 1 0 K

R 1 1 4 1 0 02 5 D R A S

2 5 D C A S

R 1 1 6 1 0 0

C 0 V

3 7 D S E O N

4 2 E R D P S

4 2 B , 3 8 E C M L H

L 5 V

L 2 1 0 0

G N D F G

C R X D

C K S

T X D

R X D

C T S

+ 5 V

E 0 V

R 9 4

7 5 F

C 7 8

C C 1 0 4

R 1 3 2

1 0 K

R 9 3

1 0 0 F

C R X D

C T S

R X D

T X D

C K S+ 5 V

G N D

C 1 7

*

R 1 0

4 . 7 K

+ 5 V

G N DP 1 5

I M S A - 9 1 1 0 S - 0 8 L

8

5

P C I

7

2

4

1 6 B P B U S

1 2 D C S E N

3

1

6

3 2 E H D C

2 3 C M T I 1

3 2 A R B

3 4 C S R A M

4 6 E V O L 3

2 5 C B A R M R D

C 1 4

C 1 0 1

1 6 4

2 0 0

V S S

V D D1 9 0

A G N D5 9

C 53

2

1

C 4

C 3C 5

C 4

C 3

1 4 A R S T L

4 6 E V O L 1

1 5 B S D O T

1 2 B S D I N

1 2 B P C L K

1 2 B S D O U T

A P D M D T

A P D M C KA M K

A M T

9

8

M U T E7 M U T

R 6 7

9 9C L B

4 2 F D A S N O

R 5 9 1 0 k

2 2M I O 5

2 4M I O 1 2

C 3 8

0

G N D

2 1M I O 4

4 6 E S P O N

4 5 D H A F H

4 4 D T X S L

3 8 C F R N T

5 2 D C L R X S

S D I N

2 5 C B A R M W E

1 4 A R S T L

7 3B A E N B

6 6C K 3 2

6 8B A K C L K

7 4B A V D D

6 5B A K S E L

7 2B A R M R D

2 5M I O 1 3

2 0 5M V D D

L 5 V

+ 5 V

M M 3

R B U S 3 4 D

M M 2

M M 1

M M 2

M M 3

M M 4

8 4

8 5

8 6

8 7

WR

M M 4

7 1B A R M W E

L 5

M M Z Y 6 0 1 B

G N D

7 4 V H C U 0 4 F S

# 1 2

5 1 3 7

1 4

C 1 0 8

C C 1 0 4

+ 5 V

1 19

# 1 2 7 4 V H C U 0 4 F S

14 3 2

R 6 0 4 . 7 K

O D P I O 31 8 1

O D P I O 44 2

F D C L K3 3

F D O U T3 4

F D I N3 5

F C S 13 6

6 7C K 3 2 O N

2 7 B R O M C

4 2 F A D L C

+ 2 6 V

E 0 V

R 9 6

7 5 K

R 9 5

1 0 K FC 7 9

C C 1 0 4

R 8 4

2 2 K

R 1 3 3 1 0 k

R 8 5 *

C L B U S 5 1 CV O L 2 4 6 E

M M 1

I O R Q

C K 1 6

R D

M B U S 2 3 C

M R E Q

R 8 1 2 0 0

2 5 B E P D O

C 3 9

C C 1 0 4

3 2 E D O U T

3 4 C E 1 C S

3 2 E D I N

L 5 V

+ 5 V

G N D

C 1 8

C C 1 0 1

G N D

+ 5 B

D 1

*R 1 2 5

0

G N D

R 1 1

4 . 7 K

G N DP 1 4

B 2 B - P H

W H I T E

1

H O O K

2

1 5 C H O O K

R 1 2 7

*

+ 5 V

L X

0

R 8 3 1 0 K

R 6 4

R 1 1 7 2 0 0

R 1 1 8

2 0 0

R A 12 0 0

L 5 V

G N D

G N D

C 6 7

C C 1 0 4

+ 5 V

R 8 8 1 0 0

G N D

C 7 1

C C 1 0 2 B

+ 5 B

4 5 E R N G O

C 6

*

R A 2

2 0 0

C 7 0

C C 1 0 4

C 5 0

0

c 6 3

C C 1 0 4

C 6 6

C C 1 0 4

R V D D

G N D

R 7 9 *

R 8 6 *

L 3 0

C 4 0

C C 1 0 4

E 5 V

R 9 2

7 5 F

2 0 0

3 0 0

3 0 0

+ 5 V

L 1

0

L 5 V

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

6

5

2

8

4

1

7

3

9

:

A

Main PCB Circuit Diagram 1/5

1 FAX engine (ASIC) which integrates a CPU, digital portion of MODEM and gate arrayfor managing the I/Os, memories, and drivers.

2 XT1, oscillator for the CPU.

3 XT3, oscillator for the calendar clock.

4 XT2, oscillator for the MODEM.

5 Reset IC which turns on at the powering-on sequence and at any of the reset opera-tions.

6 Connector for the control panel

7 Recording head drive voltage detector

8 Inverters

9 Connector for the modular PCB

: Connector for the hook switch PCB

A Backup circuit for the calendar clock


34/193

III 22


1 Connector for the power supply PCB which supplies 25V and 8V.

2 3-terminal regulator which eliminates unstabilized components of the +8V source togenerate stabilized +5V source.

3 Connector for the Ni-MH battery which supplies approx. 5V.(Provided on the FAX1570MC/1030/MFC1870MC/1970MC)

4 3-terminal regulator which generates +5B source from +8V to back up the DRAM(that stores received data).(Provided on the FAX1570MC/1030/MFC1870MC/1970MC)

5 Connector for the motor6 Motor driver

7 Connector for the clutch solenoid (that switches the power transmission).

8 E2PROM (32-kilobit for the FAX1570MC/1030/MFC1970MC, 16-kilobit for other mod-els.)

9 ROM (2-megabit. Note that the qualification machines for demonstration have a 4-megabit ROM.)

: DRAMs (1-megabyte, two 4-megabit chips) provided on the FAX1570MC/1030/MFC1970MC.

A DRAM (512-kilobyte) provided on the MFC1870MC. The FAX1170/1270/1010/1020/MFC1770 has its equivalent DRAM on location #7.

1 4 E D B A S

1 5 A R A S

1 5 A C A S

1 5 B B A R M W E

1 5 B B A R M R D

1 4 D D A B U S

G N D+ 5 V

8

6

7

4

1

2

3

V C C V S S

S C L

S D A

T E S T A 2

A 1

A 0

# 4

2 4 L C 1 6 ( 1 8 7 0 M C )

2 4 L C 3 2 ( 1 9 7 0 M C )

1 5 D E P C K

1 5 D E P D O

C 9 5

C C 1 0 4

1 6 D A B U S

1 4 D D A B U S

+ 5 V

D A 9

V P P

- C E

- O E

- P G M

D A 8

D A 7

D A 6

D A 5

D A 4

D A 3

A 1 1

A 1 0

A 9

A 8

A 7

A 6

A 5

A 4

A 3

A 2

A 1

A 0

D 7

D 6

D 5

D 4

D 3

D 2

D 1

D 0

V C C

G N D

G N D+ 5 V

1 5 A R O M C

1 5 A R M R D

1

3 2

2 2

2 4

1 2

1 1

1 0

9

8

7

6

5

2 7

2 6

2 3

2 5

4

2 8

2 9

1 6

1 3

1 4

1 5

1 7

1 8

3 1

3

2

3 0

1 9

2 0

2 1

# 8

P D 2 7 C 2 0 0 1 B - 1 5

A 0

A 1

A 2

A 3

A 4

A 5

A 6

A 7

A 8

A 9

A 1 0

A 1 1

A 1 2

A 1 3

A 1 4

A 1 5

A 1 6

A 1 7 D 7

D 6

D 5

D 4

D 3

D 2

D 1

D 0

C 5 8

C C 1 0 4

R 7 6 S T D M O D E L = 0

D . S M O D E L = *

R 7 7 S T D M O D E L = *

D . S M O D E L = 0

5

R 1 2 04 . 7 k

O U T 3

I 0

I N 3

C / R

O U T 2

8 1 7

2 5

7

2 1

1

1 5

2 8

2 9

3 0

# 1

M T D 2 0 0 3 F

1 1

2 0

V S A

R S A

V S B

R S B

2 3

4

2 2V R

I N 1

I N 2

M M 4

2 6

I 11 8

I N 41 6

+ 2 6 V

1 3

3

5

6

9

1 0

1 2

1 9

2 4

O U T 4

N C

C 1 0 5

C C 1 0 4

P 0 V

B A T

1

2

P 6

B 2 B - P H

B L A C K

C 9 0

C C 1 0 4

G N D

V M M

V M M

V C C

V C C

G N D

R 2

1 / 2 W

1

R 1 1 2

*

R 1 1 0

0

R 1 3 0

2 0 K

R 1 1 1

*

1 4

2O U T 1

2 7 M M 1

M M 3

M M 2

M B U S 1 6 B

M T I 0 1 2 E

M T V R 1 5 D

N C

N C

N C

N C

N C

N C

N C

M T I 1 1 2 E

+ 2 6 VS O L

1

2

P 1 3

B 2 B - P H

B L U E

P 0 V

S O L 1 5 D

Q 1 1 *

G N D

Q 2

D T D 1 1 3 Z KD 3

1 S S 1 2 0

P 2

B 6 B - P H

M O T O R

3

4

2

6

5

1

C 1

3 5 V / 2 2 0

1 0 5 C

C 1 0 7

5 0 v

C C 1 0 4

+ 5 V

+ 5 B

P 0 V

C 9 1

C C 1 0 4

+ 5 V

I N O U T

G N D

Q 1 2 R H 5 R A 4 7

+ 5 V

R 1

1 / 2 W

1

C 1 0 6

C C 3 3 2 B

D A 9

D A 8

D A 7

D A 6

D A 5

D A 4

D A 3

D A 2

D A 1

D A 0 D 0

D 1

D 2

D 3

A 9

A 8

A 7

A 6

A 5

A 4

A 3

A 2

A 1

A 0

N C

V C C

D Q 5

D Q 7

D Q 8

D Q 6

- R A S

- C A S

- WE

- O E

D A 9

D A 8

D A 7

D A 6

D A 5

D A 4

D A 3

D A 2

D A 1

D A 0

D 4

D 5

D 6

D 7

1 4

8

2 3

7

2 2

1 0

1 1

1 2

1 3

1 6

1 7

1 8

1 9

2 0

9

2 7

2 6

2 5

2 4

2 1

G N D+ 5 B

# 6 ( 1 8 7 0 M C )

H M 5 1 4 8 0 0 J P

C 6 4

C C 1 0 4

2

3D Q 1

D Q 3

D Q 4

D Q 2

D 0

D 1

D 2

D 35

4

1V C C

1 5V S S

V S S

N C

2 8

6

A 9

A 8

A 7

A 6

A 5

A 4

A 3

A 2

A 1

A 0

- R A S

- C A S

- WE

- O E

D A 9

D A 8

D A 7

D A 6

D A 5

D A 4

D A 3

D A 2

D A 1

D A 0

4

2 3

3

2 2

9

1 0

1 1

1 2

1 4

1 5

1 6

1 7

1 8

5

G N D+ 5 B

# 7 ( 1 9 7 0 M C )

H M 5 1 4 4 0 0

C 9 4

C C 1 0 4

1

2D Q 1

D Q 3

D Q 4

D Q 2

D 4

D 5

D 6

D 72 5

2 4

1 3V C C

2 6V S S

A 9

A 8

A 7

A 6

A 5

A 4

A 3

A 2

A 1

A 0

- R A S

- C A S

- WE

- O E

4

2 3

3

2 2

9

1 0

1 1

1 2

1 4

1 5

1 6

1 7

1 8

5

G N D+ 5 B

# 5 ( 1 9 7 0 M C )

H M 5 1 4 4 0 0

C 9 3

C C 1 0 4

1

2D Q 1

D Q 3

D Q 4

D Q 2

2 5

2 4

1 3V C C

2 6V S S

C 5

1 6 V 4 7

P S

4

1

3

2

P 3

B 4 B - P H

P 0 V

+ 2 6 V

+ 5 V

C 3

1 6 V 4 7

C 9 6

C C 1 0 4

C 9 7

C C 1 0 4

+ 9 V

I N O U T

G N D

# 3 K I A 7 8 0 5

G N D

D A 1

1 S S 3 7 8

R 1 1 9

*

G N D

R 1 1 3

1 K

+ 9 V

C 4

1 6 V 4 7

G N D

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

12

4

3

5

6

7

8

9

A

:


35/193

III 23


1 Connector for the CIS

1-1: Power for the CIS LED array

1-2: Clock output

1-3: Trigger signal output. One shot of this signal triggers a line of scan.

1-4 LED control signal output circuit which controls the intensity of the CIS LED array.

1-5: Input of video data (VID) to the FAX engine

1-6: Clamp circuitry that gives the bias level to the amplifier of the VID input circuit according tothe CLMP and CPWM signals issued by the CPU (that monitors the current video data

input) for compensating the DC component of video signals for the next scan line.

Working with the FAX engine, this circuitry carries out the standard scanning. (This

circuitry is provided on the FAX1170/1270/1010/1020/MFC1770/1870MC.)

1-7 SANYO LSI that carries out the high-quality scanning. (Provided on the FAX1570MC/1030/MFC1970MC)

2 Connector for the thermal recording head

2-1: Power 5V for the thermal recording head

2-2: Thermister signals which are normalized by the resistor network and fed to the FAX engine

2-3: Strobe signals

2-4: Data signals

2-5: Ribbon sensor signal

3 Connector for the sensor PCB

3-1: Paper-edge sensor signal

3-2: Paper ejection sensor signal

4 Document front and rear sensor circuitry that is active only while the SEON signal is on.

4-1:PH2, document rear sensor

4-2:PH1, document front sensor

+ 2 6 V

+ 5 V

R B 1 2 E

L A T C 1 5 C

H R L Y 3 6 E

C P 3 I 1 2 F

H D C 1 2 D

G N D

+ 5 V

C I S

P 9

B 7 B - P H

1

2

9

4

3

S T 1 1 2 D

R I B O N 1 2 D

T M

1

4

1 0

P 5

B 1 1 B - P H

R 1 0 7

3 3 K F

R 1 0 8

1 0 0 K F

R 1 0 5

1 0 K

T G 1 2 E

+ 5 V

G N D

R 5 V

7

V I D 1 2 E

Q 8

2 S C 3 0 5 2

G N D

Q 1 0

K R C 1 0 7 S

R 0 V

Q 1

2 S D 1 8 5 8

R 3

1 W

3 0

C P WM 1 5 D

R 1 0 2

1 0 K

R 1 0 0

2 . 2 K

R 0 V

R 0 V

R 5 V

R 1 0 1

1 0 K

R 5 V

L I G T 1 1 C

R 5 V

R 0 V6

5

C 8 2

C C 1 0 4

G N D

C 8 5

C C 1 0 1

C 8 6

*

1 1

6

C 8 7

*

S T 2 1 2 D

D O U T 1 2 E

D I N 1 2 E

8

C 8 3

*

R 1 0 6 1 0 0

R 1 0 4 2 0 0

C 8 8

C C 1 0 1

C 8 4

C C 1 0 1

C 8 9

C C 1 0 1

7

2

3

5

G N D

R 0 V

R 1 0 9

1 0 K F

Q 9

2 S K 1 3 9 9

Q 7

2 S C 3 0 5 2

C 8 1 6 V / 1 0

R 9 7 4 7 0

R 9 8 2 7 0

R 5 V

C L M P 1 5 D

R 1 0 3 1 K

R 9 9 2 2 K

C 8 0

C C 1 0 4

R 0 V

R S T H V D D

V D D

V D D

T E M P

A T A P

P O R T 2

P O R T 3

T R I G

D G N D

M T P

S D / P D 7

P D 6

P D 5

P D 1

D 0

D 1

D 2

D 3

D 4

D 5

D 6

D 7

A 0

A 2

A 3

A 4

A G N D

A G N D

A V D D

4 2

4 0

4 1

3 5

3 4

3 1

4 3

1 0

2 4

5 6

9

1 7

2 6

4 9

6 4

4 7

4 8

5 0

5 4

5 9

3 6

4 6

2 0

1 8

1 6

1 5

8

7

6

5

4

3

2

1

R 0 V

R 5 V

R 0 V

# 1 0

L C 8 2 1 0 2 W

D B U S 1 4 E

1 1

1 2

A 5

A 6

A 7

A 8

1 4

1 3

1 9A 1

P D 4

P D 3

P D 2

5 1

5 2

5 3

S A M P

R S

3 3

6 2

S H

C L K 1

6 3

6 1

C L K 26 0

P D 05 5

D A C K5 7

D R E Q5 8

R D A T 1 2 E

+ 5 V

3 0

2 9

2 8

2 7

2 3

2 2

2 1

2 5

3 2

I C L K

I O C S

M C S

I O E

M E

R D

WR

C L K I N

R E S E T

1 5 D S R A M

3 9

R S T L

A I N

3 8

4 5

4 4

P O R T 0

P O R T 1

3 7A D R E F L

R 0 V

C 9 9

C C 1 0 4

C 9 8

C C 1 0 4

C 1 0 1

C C 1 0 4

C 8 1

C C 1 0 4

C 7

1 6 v

1 0

R 1 2 3

3 0 0

R 1 2 1

0

R 1 2 2

2 0 0

C 1 0 2

C C 1 0 4

C 1 0 0

*

A 8

R D

WR

C K 1 6

D 7

D 0

D 1

D 2

D 3

D 4

D 5

D 6

D G N D

D G N D

D G N D

D G N D

G N D

M R E Q

I O R Q

R 5 V

1 6 D A B U S

G N D

A 5

A 6

A 7

A 4

A 0

A 2

A 3

A 1

1 4 A R S T L1 6 B R B U S

1 2 E T G

1 2 E S M C

1 2 E E 1 C S

3 3 F H R L Y

+ 5 V

F R N T 1 2 D

P W O N 1 5 D

C M L H 1 5 B

P H 1

S G - 1 0 5 F 3 0 8

+ 2 6 V

R E A R 1 2 D

P H 2

S G - 1 0 5 F 3 0 8

# 1 3

U M G 5 N

1

3

6

4

2

R 1 2 4

1 0 0 K

R 1 2 8

1 0 0 K

G N D

P 1

B 5 B - P H

B L A C K

1

S E N S O R

3

4

2

G N D

1 2 D F S E N

1 2 D R S E N

4 2 E C M L L

R 1 2 9

1 0 0 K

+ 5 V

G N D

C 1 0 3

C C 1 0 2 B

C 1 0 4

C C 1 0 2 B

R 1 2 6

1 0 0 K

+ 5 V

G N D

C 1 0 9

C C 1 0 2

5

1 2 E S E O N

G N D

Q 1 3

K R C 1 0 7 S

C 1 1 2

*

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

4

4 -1

4 -2

3 -1

3 -2

1 -7

3

1 -4

1 -5

1 -6

1 -1

1 -21 -3

1

2

2 -1

2 -2

2 -32 -42 -3

2 -5


36/193

III 24


1 Connector for the NCU

2 Analog signal selectors

2-1: Selects either input signals from the handset or those from the MODEM.

2-2: Selects either RL1 or RL2 signals inputted from the communications network.

2-3: Selects either sound signals (e.g., alarm beeps, key clicks and ringer sounds)generated by the FAX engine or signals selected by2-2.

3 Voice switching analog selectors

3-1: Switches between the output line and input line for monitoring. When

switched to the output line, this selector allows FAX sending operation to bemonitored; when switched to the input line, it allows received voices to bemonitored.

3-2: Selects either voice signals inputted from the communications network or re-corded voice signals inputted from the microphone or handset through theMODEM.

4 Amplifier circuit for signals outputted from the MODEM.

5 Analog front end IC which processes the analog I/O signals from/to the MODEM.

6 Amplifier & shaper circuit for signals inputted from the communications network.

7 Telephone circuit for transmitting signals.

8 Speaker amplifier circuit which amplifies sounds issued from the above analog signalselector2-3 and feeds them to the speaker.

-

+

C

0

1

C N T

4 0 5 3

-

+

G N D

1 2 D S P O N

C

1

0

C N T

4 0 5 3

M O V

S L

+ 5 V

M 0 V

4 0 5 3

# 1 7

+ 2 6 v

M 0 V

K I 3 2 4

# 1 8

6 7 8

1 6 4

1 1

N C U

D A R E C 1 1 C

R N G L 1 5 C

1

2

S P

P 4

B 2 B - P H

W H I T E

P 1 0

I M S A - 9 1 1 0 S - 1 8 L

# 1 8

K I 3 2 4

# 1 8

K I 3 2 4

+ 5 V

C 2

1 0 V 1 0 0

4 0 5 3

C N T

C T S L 5 3 BC

0

1

# 1 9

# 1 9

# 1 7

R 3 7

2 2 K

R 1 8 0

C 2 2 C C 1 0 3 B

R 3 3 1 . 5 K

R 2 0

*

C 5 7

C C 1 0 4

R 2 8 4 3 K

R 1 1 5

3 3 K

R 8 9

3 . 3 K

T X O U T

R X I N B

V B I A S

3

1 6

2

M 0 V

C 9

1 6 V 1 0

R 6 3 1 K

C 4 5

C C 1 0 4

C 4 6

C C 1 0 3 B

R 6 2

1 0 0 K

C 4 8

C C 1 0 4

C 4 4

C C 2 2 1

1 5R X I N A

A P D M D T

D P D M C K

D P D M D T

A P D M C K

5

6

7

9

1 0

1 1

1 2

1 3

# 1 5

T C 3 5 1 3 3 F

C 3

C 4

C 5

M U T E

T B U S 1 4 D

V D D

V S S

V S S

- P D8

1

4

1 4

M O V

R S T L 1 4 A

M U T

D M K

D M T

A M K

A M T

C 3

C 4

C 5

-

+

5

76

2

3

4

1

# 2

N J M 3 8 6 M

C 9 2

C C 1 0 3 B

G N D

R 3 5

1 2 K

C 2 3 *

C 1 2

C C 1 0 3 B

C 2 8

C C 1 0 5 ( 2 1 2 5 C H I P )

C 5 6

C C 1 0 4

C 2 4

5 0 V

C C 1 0 4

M 0 V

+ 5 V

R 7 1

2 7 K

G N D

T L O F 1 5 C

T L O F 2 1 2 D

D A S N D 1 1 C

C 4 7

C C 1 0 4R 7 4

1 0 0 K

R 3 4

3 0 0

1 5 B V O L 1

1 5 C V O L 3

Q 3

K R C 1 0 7 S

T L R L 5 3 A

-

+

# 1 8

I 3 2 4

R 2 6 7 5 K

C 2 5 C C 2 2 1

R 6 5

5 6 K

R 3 0

4 . 7 K

M 0 V

R 2 9 5 6 K

C 4 9

C C 1 0 2 B

R 5 1 K

C 2 1 C C 6 8 1

R 1 7

*

+ 9 V

A R E F

R L 1

-

+

# 1 8K I 3 2 4

R 2 3 5 6 K

C 2 7 C C 1 0 4

R 2 1 1 0 K

C 2 0 C C 6 8 1

+ 2 6 V

R 2 2

1 / 1 0 W

1 K

M 0 V

R 2 4 1 5 0 K

R 1 3 0

R 1 4

4 . 7 K

R 1 6

0

M 0 V

M 0 V

A R E F

A R E F

A R E F

C 1 1

3 5 V 1 0

A R E F

R L 2

R 7 3 1 . 5 K

C I 1 5 C

D A S T 1 1 D

R D P S 1 5 C

C M L L 3 6 E

E A T 1 5 B

+ 2 6 V

+ 5 V

G N D

P L S 1 5 C

5

9

6

7

1

1 2

1 0

1 1

3

8

1 3

2

1 5

4

1 4

1 7

1 8

M 0 V

Q 5 K R C 1 0 7 S

M 0 V

1 6

T L S L 5 1 B , 5 3 B

Q 4 *

D 2

H Z S 5 C

G N D

R 1 5 1 . 5 K

R 1 9 *

D 4 * D 7 1 S S 1 2 0

D 5 *

D 6 1 S S 1 2 0

R 4

1 K

R 3 6

1 K

1 5 E V O L 2

4 0 5 3

C M L H 1 5 C

# 1 9

C

1

0

C N T

5 3 B C T S L

C N T

4 0 5 3

T A D H 1 2 C

# 1 7

C

0

1

A D L C 1 5 B

T E L L 1 5 C

C

C N T

4 0 5 3

# 1 7

C T R L 5 1 A , 5 3 B

1

0

H A F H 1 2 C

R 2 5 2 0 0 K

R 7 2 1 . 5 K

T X S L 1 2 C

R 6

2 2 K

+ 5 V

A R E F

R 2 7

4 . 7 K

R 3 1 1 0 K

R 3 2

1 0 0 K

1 5 C R N G O

+ 5 V

M 0 V

4 0 5 3

# 1 9

6 7 8

1 6

C 2 6

C C 1 0 4

R 7 5

1 . 5 K

5 5 D H F R L

C 1 1 0

C C 1 0 4

M 0 V

O T O 1 5 C

R 1 2 1 0 0 K

M 0 V

D 8

*

5

3

9

43

5

9

41 2

1 3

1 1

1 4

1

2

1 0

1 51 2

1 3

1 1

1 4

1 5

1 0

2

1

8

9

1 0

1 4

1 3

1 2

7

6

5

3

2

1

C 1 9

C C 1 0 4

+ 2 6 V

D 9

1 S S 1 2 0

G N D

C 1 1 1

C C 1 0 4

C 1 1 3

1 6 V 1 0 ( 5 m m )

G N D

R 1 3 4

1 K

D 1 0

1 S S 1 2 0

8

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

1

: -1: -2: -3

8 9

:

7

3 -13 -2

2 -3

4 5

6

2 -1

2 -2


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III 25

9 Connector for the speaker

: Speaker volume control circuit

:-1: VOL1 OFF ON ON

:-2: VOL2 OFF OFF ON:-3: VOL3 OFF OFF ON

Speaker volume High Medium Low (ON: Closed OFF: Opened)


38/193

III 26


1 Connector for the microphone

2 Voice signal amplifier circuitThese are provided on the FAX1570MC/

3 Analog portion of MODEM1030/MFC1870MC/1970MC.

+ 5 V

+ 5 V

M 0 V

4 0 5 3

# 1 1

+ 5 V

M 0 V

B A 1 0 3 5 8 F

# 1 4

6 7 8

1 6 8

4

# 1 4

B A 1 0 3 5 8 F

R 4 3

1 0 K

C 3 2

C C 1 0 4

R 5 7 1 0 0 K

T X O U T

R X I N B

V B I A S

3

1 6

2

H R E F

C 1 0

1 6 V 1 0

R 5 3 *

C 5 2

C C 1 0 4

R 5 4

1 0 0 K

C 3 3

C C 6 8 1 B

1 5R X I N A

A P D M D T

D P D M C K

D P D M D T

A P D M C K

5

6

7

9

1 0

1 1

1 2

1 3

# 1 6

T C 3 5 1 3 3 F

C 3

C 4

C 5

M U T E

T B U S 1 4 D

V D D

V S S

V S S

- P D8

1

4

1 4

M O V

R S T L 1 4 A

A M U T

D M K

A D M D

A M K

A A M D

C 0

C 1

C 2

-

+

C 3 7 6 8 1 B

C 2 9

C C 1 0 4

C 3 4

C C 1 0 4

+ 5 V

R 4 5

8 . 2 K

C 5 4

C C 1 0 4

-

+

# 1 4

B A 1 0 3 5 8 F

R 5 5 7 5 K

C 3 5 C C 2 2 1

R 5 6

5 6 K

R 4 7

4 . 7 K

M 0 V

R 4 8 5 6 K

C 3 6

C C 1 0 2 B

H R E F

H R E F

H R E F

T L S L 5 1 B , 5 3 B

R L 16

7

C 3 1

C C 1 0 4

R 4 4

8 . 2 K

M O V

R 4 6

1 0 K

R 5 8

4 . 7 K

M O V

M 0 V

C 5 5

C C 1 0 4

C 5 3

C C 2 2 1

R 6 9

1 0 0 K

R L 2

P 1 2

B 2 B - P H

R E D

4 4 D H F R L

M I C

7

6

5

3

2

1

1 2 3 4 5 6 7 8

21 3 4 5 6 7 8

A

B

C

D

E

F

A

B

C

D

E

F

1

3

2


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III 27

3.3 NCU PCB

The NCU PCB switches the communications line to telephone or built-in MODEM, under thecontrol of the main PCB.

5

R E F

4

S 0 V

R A 3 5 1 X 2

+ 2 6 V

P 1

6 0 3 3 B - 1 2 Z

S 0 V

+ 5 V

8

4

S 0 V

6 3 1

4 21

R E F

4

3

4

3

S 0 V

+ 2 6 V

C M L

C R 1

M Z F - 2 4 H G

o r

O U A Z - S S - 1 2 4 D

F G

2

5

+ 5 V

S 0 V

S R E F

4 2

5 3

4

3

1

2

P L S

S 0 V

+

-

2

1 4

3S 0 V

R L 2

2 1

43

T E L O F F

R E F

4

5

C I

S 0 V

S 0 V

N C U S L

S 0 V

+ 2 6 V

C M L

R L 2

C I

T E L O F F

P L S

T E L R L

R L 1

T E L S L

V 1

4 - 4 P M J

T E L S L4

3

2

S R E F

S 0 V

S 0 V

+ 5 V

C

E BT E L R L

1

+ 2 6 V

S 0 V

F GF G

+ 5 V+ 5 V

R E F

3 . C O M P O N E N T S I N P A R E N T H E S I S N O T T O B E M O U N T E D .

R 2 4

J W

J W9

J W 1 6

o r

B A 1 0 3 5 8

S B T 0 2 6 0 X 4

o r

F L 5 R 2 0 0 P N X 4

S B T 0 2 6 0 X 2

o r

F L 5 R 2 0 0 P N X 2

A

B

1 2 3

C

D

1 2 3 5 6

A

B

C

D

6

4

4 5

NCU PCB Circuit Diagram (U.S.A. versions)

1 Surge absorbers

2 Line relay (CML relay)

3 Line transformer

4 Circuit related to the line transformer

5 High-impedance transformer circuit

6 Calling signal detector

7 Loop current detector

8 Dial pulse generator

9 Telephone circuit

: Reference voltage generation circuit for the operational amplifiers in 4 and9

A Noise filters (provided on the FAX1570MC/MFC1870MC/1970MC)

1

2

3 4

5

6

7

8

9:A

A

A

A


40/193

III 28

T A D

B I N A T O N E

L I N E

S

E

M

BC

-

1 2

4

A - O U T

7

3

1

3

6

4

R D P S

D A S N D

-

+

R L 2

P L S

3

6

4

+ 2 6 V

+ 5 V

S 0 V

5

6T E L O F F 1

1

R E F

P O L

C H 2

F G

4

3

1

2

+

M

BC

M

BC

CB

M

E

R E F

-

+

S 0 V

A - O U T

R 2 7

1 0 K

C M L

S 0 V

D A S T

T E L O F F 1

A D L C

C M L

2

S 0 V

C N 3

4 - 4 P M J

+ 5 V

+

-

S 0 V

S O V

DG

S

D A S N D

T E L R L

S 0 V

R E F

+ 5 V

R E F

S 0 VS 0 V

+ 5 V

+ 5 V

S 0 V

E

J W9

( 1 0 )

J W 1 0

( 1 0 )

J W 1 1

( 1 0 )

J W8

( 1 0 )

T E L R L

R L 1

+ 5 V

S 0 V

S 0 V

-+

+ -

P 2

I M S A - 6 0 3 3 B

- 1 8 Z

1

2P 1

B 2 B - P H

1 2

1 1

1 0

8

3

2

5

1

9

6

7

2 0

1 3

1 8

1 7

1 5

4

1 6

1 9

E A R T H1 4

S 0 V

S 0 V

12

3

-

+

R E F

41 41

R D P S

S 0 V

S 0 V

R D P S

+ 5 V

3322 32

41

S 0 V


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7/30/2019 Brother Fax 1010, 1020, 1030, 1170, 1270, 1

Brother Fax 1010, 1020, 1030, 1170, 1270, 1570mc, MFC-1770, 1870mc, 1970mc Service Manual

Documents

Transcript of Brother Fax 1010, 1020, 1030, 1170, 1270, 1570mc, MFC-1770, 1870mc, 1970mc Service Manual