Brother MFC4450, MFC7550MC, MFC7650MC, FAX8000P, FAX8200P Service Manual

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FACSIMILE EQUIPMENT

SERVICE MANUAL

MODEL: FAX3550/3650/8000P/8200P

MFC4450/4550/4550plus MFC6550MC/7550MC/7650MC MFC9000/9500

form or by any means without permission in writing from the publisher.

Specifications are subject to change without notice.

PREFACE

This publication is a Service Manual covering the specifications, construction, theory of operation, and maintenance of the Brother facsimile equipment. It includes information required for field troubleshooting and repair—disassembly, reassembly, and adjustment—so that service personnel will be able to understand equipment function, to rapidly repair the equipment and order any necessary spare parts.

T o perform appropriate maintenance so that the facsimile equipment is always in best condition for 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. DISASSEMBL Y/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 specifications and functions are subject to change depending upon each destination.

SAFETY INFORMATION

Laser Safety (110 - 120V Model only)

This printer is certified as a Class 1 laser product under the US Department of Health and Human Services (DHHS) Radiation Performance Standard according to the Radiation Control for Health and Safety Act of 1968. This means that the printer does not produce hazardous laser radiation.

Since radiation emitted inside the printer is completely confined within the protective housings and external covers, the laser beam cannot escape from the machine during any phase of user operation.

CDRH Regulations (110 - 120V Model only)

The Center for Device and Radiological Health (CDRH) of the US Food and Drug Administration implemented regulations for laser products on August 2, 1976. These regulations apply to laser products manufactured from August 1, 1976. Compliance is mandatory for products marketed in the United States. The label shown below indicates compliance with the CDRH regulations and must be attached to laser products marketed in the United States.

The label for Japanese products

MANUFACTURED: AUGUST 1998 K BROTHER INDUSTRIES, LTD. 15-1 Naeshiro-cho Mizuho-ku Nagoya 467-8561, Japan. This product complies with FDA radiation performance standards, 21 CFR Subchapter J.

CHAPTER I.

GENERAL DESCRIPTION

CONTENTS

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

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

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

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

I – 1

1. EQUIPMENT OUTLINE

1.1 External Appearance and Weight

The figure below shows the equipment appearance and approximate dimensions.

251 (H)

452 (D)

383 (W)

(excluding the handset)

(Unit: mm)

Weight: Machine proper Approx. 8.5 kg (excluding the drum unit and toner cartridge)

In package Approx. 13.5 kg (FAX3550/3650/8000P/8200P)

Approx. 14 kg (MFC4450/4550/4550plus/6550MC/7550MC/

7650MC/9000/9500)

1.2 Components

The equipment consists of the following major components:

Top cover

High-voltage power supply ASSY

Relay PCB

Main PCB

NCU PCB ASSY

Scanner frame ASSY

Main cover

Control panel ASSY

Heat-fixing unit

Inner cover

Multi-purpose sheet feeder

Drum unit with toner cartridge loaded

Laser unit

Handset

Gear drive unit

Low-voltage power supply ASSY

Bottom plate

I – 2

2. SPECIFICATIONS

MODEL FAX3550 MFC4550 MFC6550MC MFC7550MC COLOR 1267 1138 1138 1138 PRINTER Option

Engine — HL-720 HL-730 HL-730 PPM — 6 6 6 dpi — 600 x 600 600 x 600 600 x 600 Paper Capacity 200 200 200 200 Standards — Windows GDI (600x600) Windows GDI (600x600) Windows GDI (600x600) Emulation — No PCL4 (300x300) PCL4 (300x300) Memory (Typical) — 512 KB 512 KB 1 MB Memory (Min.) — 300 KB 400 KB 1 MB Fonts Resident — No 24-bit map (PCL4 Comp) 24-bit map (PCL4 Comp) Fonts Disk Based — No Yes Yes Paper Handling LTR, LGL, A4 LTR, LGL, EXE, A4, B5, A5 LTR, LGL, EXE, A4, B5, A5 LTR, LGL, EXE, A4, B5, A5

Multi-purpose Sheet Custom Size (2.85x5-8x14) Custom Size (2.85x5-8x14) Custom Size (2.85x5-8x14) Custom Size (2.85x5-8x14) Feeder

Envelope (BL/C5/COM 10/Mona) Envelope (BL/C5/COM 10/Mona) Envelope (BL/C5/COM 10/Mona) Envelope (BL/C5/COM 10/Mona)

Printer Driver — Windows 3.1, 95 Driver with Windows 3.1, 95 Driver with Windows 3.1, 95 Driver with

Auto Installer Program Auto Installer Program Auto Installer Program

Toner Life (5%/page) 2200 pages 2200 pages 2200 pages 2200 pages Utility Software — — RPC RPC

SCANNER Option

Color/Mono — Mono Mono Mono Gray Scale — 64 256 256 dpi — 400 x 400 600 x 600 600 x 600 Twain — Yes Yes Yes ADF Capacity (pages) (30) 30 30 30 Formats — TIFF/BMP (by M/L) TIFF/BMP (by M/L) TIFF/BMP (by M/L) OCR — Option Yes Yes

COPY

dpi 200 x 400 200 x 400 600 class 600 class No. of Copies 1-99 1-99 1-99 1-99 Sorting No No Y e s Yes Reduction/Enlargement 50-200% 50-200% 50-200% 50-200%

FAX

Modem ROCKWELL V12 ROCKWELL V12 ROCKWELL V24 ROCKWELL V24 Modem Speed 14400 bps (FAX only) 14400 bps (FAX only) 14400 bps (FAX only) 14400 bps (FAX only) CCITT Group G3 G3 G3 G3 Coding Method MH/MR/MMR MH/MR/MMR MH/MR/MMR MH/MR/MMR Transmission Speed 6 sec. 6 sec. 6 sec. 6 sec. Input/Output Width 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" LCD Size 16 x 1 16 x 2 16 x 2 16 x 2 Super Fine Yes (Send only) Yes (Send only) Yes (Send only) Yes Gray Scale 64 64 64 64 Smoothing Yes Yes Yes Yes Handset Yes Yes Yes Yes One-touch Dial 20 x 2 12 x 2 12 x 2 12 x 2 Speed Dial 100 36 36 100 Telephone Index Yes Yes Yes Yes Contrast Super L/Auto/Super D Super L/Auto/Super D Super L/Auto/Super D Super L/Auto/Super D Multi-resolution Transmission

Yes Yes Yes Yes FAX/TEL Switch Yes Yes Yes Yes Distinctive Ringing Yes Yes Yes Yes Caller ID Yes Yes Yes Yes Next FAX-reservation Yes Yes Yes Yes Help Yes Yes Yes Yes TAD Interface Yes Yes Yes Yes

(1/2)

I – 3

MODEL FAX3650 MFC4450 MFC4550plus MFC7650MC COLOR 1267 1138 1138 1138 PRINTER Option

Engine — HL-720 HL-720 HL-730 PPM — 6 6 6 dpi 200 x 200 600 x 600 600 x 600 600 x 600 Paper Capacity 200 200 200 200 Standards Windows GDI (200x200) Windows GDI (600x600) Windows GDI (600x600) Windows GDI (600x600) Emulation — No PCL4 (300x300) PCL4 (300x300) Memory (Typical) — 512 KB 512 KB 1 MB Memory (Min.) — 300 KB 400 KB 600 KB Fonts Resident — No 24-bit map (PCL4 Comp) 24-bit map (PCL4 Comp) Fonts Disk Based — No Yes Yes Paper Handling LTR, LGL, A4 LTR, LGL, A4, B5, A5 LTR, LGL, A4, B5, A5 LTR, LGL, A4, B5, A5

Multi-purpose Sheet — Custom Size (2.85x5-8x14) Custom Size (2.85x5-8x14) Custom Size (2.85x5-8x14) Feeder

Envelope (BL/C5/COM 10/Mona) Envelope (BL/C5/COM 10/Mona) Envelope (BL/C5/COM 10/Mona)

Printer Driver — Windows 3.1, 95 Driver with Windows 3.1, 95 Driver with Windows 3.1, 95 Driver with

Auto Installer Program Auto Installer Program Auto Installer Program

Toner Life (5%/page) 2200 pages 2200 pages 2200 pages 2200 pages Utility Software — — RPC RPC

SCANNER Option

Color/Mono — Mono Mono Mono Gray Scale — 64 64 256 dpi — 400 x 400 400 x 400 600 x 600 Twain — Yes Yes Yes ADF Capacity (pages) — 30 30 30 Formats (Import) —

TIFF/BMP/PCX/DCX/BTF/BTX/UNI TIFF/BMP/PCX/DCX/BTF/BTX/MAX TIFF/BMP/PCX/DCX/BTF/BTX/MAX Formats (Export) — TIFF/BMP/UNI TIFF/BMP/MAX TIFF/BMP/MAX OCR — Option Yes Yes

COPY

dpi 200 x 400 200 x 400 200 x 400 600 class No. of Copies 1-99 1-99 1-99 1-99 Sorting Ye s No No Yes Reduction/Enlargement 50-200% 50-200% 50-200% 50-200%

FAX

Modem ROCKWELL V12 Toshiba ROCKWELL V12 ROCKWELL V24 Modem Speed 14400 bps (FAX only) 9600 bps (FAX only) 14400 bps (FAX only) 14400 bps (FAX only) CCITT Group G3 G3 G3 G3 Coding Method MH/MR/MMR MH/MR/MMR MH/MR/MMR MH/MR/MMR Transmission Speed 6 sec. 9 sec. 6 sec. 6 sec. Input/Output Width 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" LCD Size 16 x 1 16 x 2 16 x 2 16 x 2 Super Fine Yes Yes Yes Yes Gray Scale 64 64 64 64 Smoothing Yes Yes Yes Yes Handset Yes No Yes Yes One-touch Dial 20 x 2 12 x 2 12 x 2 12 x 2 Speed Dial 100 36 36 100 Telephone Index Yes Yes Yes Yes Contrast Super L/Auto/Super D Super L/Auto/Super D Super L/Auto/Super D Super L/Auto/Super D Multi-resolution Transmission

Yes Yes Yes Yes FAX/TEL Switch Yes Yes (with External) Yes Yes Distinctive Ringing Yes Yes (with External) Yes Yes Caller ID Yes No Yes Yes Next FAX-reservation Yes Yes Yes Yes Help Yes Yes Yes Yes TAD Interface Yes Yes Yes Yes

(1/2)

I – 4

MODEL FAX8000P MFC9000 MFC9500 FAX8200P COLOR 1138 1138 1138 1138 PRINTER Option Option

Engine — HL-730 HL-730 — PPM — 6 6 — dpi —

600 x 600 (GDI) / 300 x 300 (PCL4) 600 x 600 (GDI) / 300 x 300 (PCL4)

— Paper Capacity 200 200 200 200 Standards — Windows GDI Windows GDI — Emulation — PCL4 PCL4 — Memory (Typical) — 512 KB 512 KB — Memory (Min.) — 400 KB 400 KB — Fonts Resident — 24-bit map (PCL4 Comp) 24-bit map (PCL4 Comp) — Fonts Disk Based — Yes Yes — Paper Handling A4, B5, A5 A4, B5, A5 A4, B5, A5 A4

Multi-purpose Tray

Custom Size (73x127-126x350 mm) Custom Size (73x127-216x350 mm) Custom Size (73x127-216x350 mm)

—

Envelope (DL/C5/COM 10/Mona) Envelope (DL/C5/COM 10/Mona) Envelope (DL/C5/COM 10/Mona)

Printer Driver — Windows 3.1, 95 Driver with Windows 3.1, 95 Driver with

—

Auto Installer Program Auto Installer Program

Mac Driver (Option) Mac Driver (Option)

Toner Life (5%/page) 2200 pages 2200 pages 2200 pages 2200 pages Utility Software —

Remote Priter Console (RPC) Remote Printer Console (RPC)

—

SCANNER Option Option

Color/Mono — Mono Mono — Gray Scale — 256 256 — dpi — 600 x 600 600 x 600 — Twain — Yes Yes — ADF Capacity (pages) 30 30 30 — Formats — TIFF/BMP TIFF/BMP — OCR — Option Yes —

COPY

dpi 200 x 400 300 x 400 300 x 400 200 x 400 No. of Copies 1-99 1-99 1-99 1-99 Sorting

Available with optional memory

Yes Yes Yes

Reduction/Enlargement 50-200% 50-200% 50-200% 50-200%

FAX

Modem ROCKWELL V12 ROCKWELL V12 ROCKWELL V24 ROCKWELL V12 Modem Speed 14400 bps (FAX only) 14400 bps (FAX only) 14400 bps (FAX only) 14400 bps (FAX only) CCITT Group G3 G3 G3 G3 Coding Method MH/MR/MMR MH/MR/MMR MH/MR/MMR MH/MR/MMR Transmission Speed 6 sec. 6 sec. 6 sec. 6 sec. Input/Output Width 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" 8.5"/8.5" LCD Size 16 x 1 16 x 2 (STN) 16 x 2 (STN) 16 x 1 Super Fine (Send) Yes Yes Yes Yes Super Fine (Receive)

Available with optional memory Available with optional memory Available with optional memory

Yes Gray Scale 64 64 64 64 Smoothing Yes Yes Yes Yes Handset No No No No One-touch Dial 20 x 2 12 x 2 12 x 2 20 x 2 Speed Dial 100 100 100 100 Telephone Index Yes Yes Yes Yes Contrast Light/Auto/Dark Light/Auto/Dark Light/Auto/Dark Light/Auto/Dark Multi-resolution Transmission

Yes Yes Yes Yes FAX/TEL Switch Yes Yes Yes Yes Distinctive Ringing Yes Yes Yes — Caller ID

Yes (U.K., Sweden, Holland and France) Yes (U.K., Sweden, Holland and France) Yes (U.K., Sweden, Holland and France) Yes (U.K., Sweden, Holland and France) Next FAX-reservation Yes Yes Yes Yes Help Yes Yes Yes Yes TAD Interface Yes Yes Yes Yes

(1/2)

I – 5

MODEL FAX3550 MFC4550 MFC6550MC MFC7550MC FAX

Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq Std/Del/Seq Std/Del/Seq Std/Del/Seq Receive password Yes Yes Yes Yes Delayed Transmission Yes, 3 timings Yes, 3 timings Yes, 3 timings Yes, 3 timings Call Reservation Yes Yes Yes Yes Callback Message Yes Yes Yes Yes Page Memory (TX)* 300 KB (30 pgs: MMR) 200 KB (20 pgs: MMR) 300 KB (30 pgs: MMR) 700 KB (70 pgs: MMR) Out-of-paper Reception* 400 KB (40 pgs: MMR) 400 KB (40 pgs: MMR) 600 KB (60 pgs: MMR) 1.5 MB (150 pgs: MMR) Super Quick Scan Yes Yes Yes Yes Auto Reduction Yes Yes Yes Yes ECM Yes Yes Yes Yes Broadcasting Yes Yes Yes Yes Multi Transmission Yes Yes Yes Yes

MESSAGE CENTER

TAD Feature No No Yes (Hardware & PC) Yes (Hardware & PC) ICM Recording Time No No Hardware: 15 min. Hardware: 30 min. Paging No No Yes (Hardware & PC) Yes (Hardware & PC) Toll Saver No No Yes (Hardware & PC) Yes (Hardware & PC) OGM No No Yes (Hardware & PC) Yes (Hardware & PC) Mail Box No No Yes (PC only) Yes (PC only) Fax-on-demand No No Yes (PC only) Yes (PC only) Voice-on-demand No No Yes (PC only) Yes (PC only) FAX Forwarding Yes Yes Yes Yes FAX Retrieval Yes Yes Yes Yes

MACHINE MEMORY 0.75 MB 0.75 MB 1 MB 2 MB

OPTIONAL MEMORY 1 or 2 MB 1 or 2 MB 1 or 2 MB 1 or 2 MB

(FAX & PRINTER FLEX)

PC FAX (Send/Receive) Option Yes (by M/L) Yes (by M/L) Yes (by M/L)

Standard — Class 1, 2 Class 1, 2 Class 1, 2

DATA MODEM No No No No

INTERFACE

Printer Interface —

Centronics parallel (w/o cable) Centronics parallel (w/o cable) Centronics parallel (w/o cable) MULTI-FUNCTION LINK PRO MULTI-FUNCTION LINK PRO MULTI-FUNCTION LINK PRO

PC Interface

RS-232C

———

(8-pin modular connector)

MULTI-FUNCTION LINK

Extended I/O Interface — —

RS-232C and RS-422 RS-232C and RS-422 (supported by an optional serial (supported by an optional serial interface board RS-100M) interface board RS-100M)

Simultaneous

Sends FAX and Prints — Yes Yes Yes Receives FAX and Prints

— Yes Yes Yes

Receives FAX and Scans

— Yes Yes Yes Prints and Scans — Yes Yes Yes Receives FAX and Copies

— Yes Yes Yes Prints and Copies — Yes Yes Yes

* CCITT#1 Chart in the Standard Mode, MMR

(2/2)

I – 6

MODEL FAX3650 MFC4450 MFC4550plus MFC7650MC FAX

Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq Std/Del/Seq Std/Del/Seq Std/Del/Seq Delayed Transmission Yes, 13 timings Yes, 3 timings Yes, 3 timings Yes, 13 timings Call Reservation Yes Yes (with External) Yes Yes Callback Message Yes Yes Yes Yes Page Memory (TX)* 1 MB (100 pgs: MMR) 300 KB (30 pgs: MMR) 300 KB (30 pgs: MMR) 800 KB (80 pgs: MMR) Out-of-paper Reception* 1.1 MB (110 pgs: MMR) 600 KB (60 pgs: MMR) 600 KB (60 pgs: MMR) 1.0 MB (100 pgs: MMR) Super Quick Scan Yes Yes Yes Yes ECM Yes Yes Yes Yes Broadcasting Yes Yes Yes Yes Multi Transmission No Yes Y es No

MESSAGE CENTER

ICM Recording Time No No No Hardware: 30 min. Paging Yes (Hardware & PC) Yes (Hardware & PC) Yes (Hardware & PC) Yes (Hardware & PC) Toll Saver No No No Yes (Hardware & PC) OGM No No No Yes (Hardware & PC) Mail Box No No Yes (PC only) Yes (PC only) Fax-on-demand No No No Yes (PC only) Voice-on-demand No No No Yes (PC only) FAX Forwarding Yes Yes Yes Yes FAX Retrieval Yes Yes Yes Yes

MACHINE MEMORY 2 MB 1 MB 1 MB 2 MB

OPTIONAL MEMORY 1 or 2 MB No 1 or 2 MB 1 or 2 MB

(FAX & PRINTER FLEX)

PC FAX (Send/Receive) Option Yes (by M/L) Yes (by M/L) Yes (by M/L)

Standard — SMSI SMSI SMSI

DATA MODEM No No No No

INTERFACE

Printer Interface —

Centronics parallel (w/o cable) Centronics parallel (w/o cable) Centronics parallel (w/o cable) MULTI-FUNCTION LINK PRO MULTI-FUNCTION LINK PRO MULTI-FUNCTION LINK PRO

PC Interface

RS-232C

———

(8-pin modular connector)

MULTI-FUNCTION LINK

Extended I/O Interface — — —

RS-232C and RS-422 (supported by an optional serial interface board RS-100M)

Simultaneous

Sends FAX and Prints — Yes Yes Yes Receives FAX and Prints

— Yes Yes Yes Receives FAX and Scans

— Yes Yes Yes Prints and Scans — Yes Yes Yes Receives FAX and Copies

— Yes Yes Yes Prints and Copies — Yes Yes Yes

* CCITT#1 Chart in the Standard Mode, MMR

(2/2)

I – 7

MODEL FAX8000P MFC9000 MFC9500 FAX8200P FAX

Coverpage Yes, Super Yes, Super Yes, Super Yes, Super Polling Type Std/Del/Seq/Sec Std/Del/Seq/Sec Std/Del/Seq/Sec Std/Del/Seq/Sec Receive password Yes/Plus Yes/Plus Yes/Plus Yes/Plus Delayed Transmission Yes, 3 timings Yes, 3 timings Yes, 3 timings Yes, 3 timings Call Reservation Yes Yes Yes Yes Callback Message Yes Yes Yes Yes Page Memory (TX)* 300 KB (30 pgs: MMR) 300 KB (30 pgs: MMR) 300 KB (30 pgs: MMR) 1 MB (100 pgs: MMR) Out-of-paper Reception* 400 KB (40 pgs: MMR) 600 KB (40 pgs: MMR) 600 KB (60 pgs: MMR) 1.1 MB (110 pgs: MMR) Super Quick Scan Yes Yes Yes Yes Auto Reduction Yes Yes Yes Yes ECM Yes Yes Yes Yes Broadcasting Up to 140 destinations Up to 124 destinations Up to 124 destinations Up to 190 destinations Multi Transmission Yes Yes Yes Yes

MESSAGE CENTER

TAD Feature No No Yes (Hardware & PC) No ICM Recording Time No No Hardware: 15 min. No Paging No No Yes (Hardware & PC) No Toll Saver No No Yes (Hardware & PC) No OGM UK/SWISS/AUS/GER UK/SWISS Yes (Hardware & PC) UK/SWISS/GER Mail Box No No Yes (PC only) No Fax-on-demand No No Yes (PC only) No Voice-on-demand No No Yes (PC only) No FAX Forwarding Yes Yes Yes Yes FAX Retrieval Yes Yes Yes Yes

MACHINE MEMORY 0.75 MB 1 MB 1 MB 2 MB

OPTIONAL MEMORY 1 or 2 MB 1 or 2 MB 1 or 2 MB 1 or 2 MB

(FAX & PRINTER FLEX)

PC FAX (Send/Receive) Option Yes Yes Option

Standard — Class 2 Class 2 —

DATA MODEM No No No No

INTERFACE

Printer Interface —

Centronics parallel (w/o cable) Centronics parallel (w/o cable) — MULTI-FUNCTION LINK PRO MULTI-FUNCTION LINK PRO

PC Interface

RS-232C

——

RS-232C

(8-pin modular connector) (8-pin modular connector)

CONNECT 5000 INTERFACE CONNECT 5000 INTERFACE

Extended I/O Interface —

RS-232C and RS-422 RS-232C and RS-422

—

(supported by an optional serial (supported by an optional serial

interface board RS-100M) interface board RS-100M)

Simultaneous

Sends FAX and Prints — Yes Yes — Receives FAX and Prints

—YesYes— Receives FAX and Scans

—YesYes— Prints and Scans — Yes Yes — Receives FAX and Copies

—YesYes— Prints and Copies — Yes Yes —

* CCITT#1 Chart in the Standard Mode, MMR

(2/2)

CHAPTER II.

INSTALLATION

CONTENTS

1. INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT...............II-1

II - 1

1. INSTALLING THE UPDATE DATA TO THE FACSIMILE EQUIPMENT

If the program version is updated or the main PCB is replaced, install the update program onto the flash ROM of the main PCB.

The program installation requires a host computer satisfying the following requirements:

- CPU Pentium 75 or higher

- RAM 8MB or greater (16MB recommended for Windows 95)

- OS Windows 3.1/3.11 or Windows 95

Connecting the equipment to your computer

(1) Make sure that the equipment's power cord is unplugged from a wall socket. (2) Make sure that your computer is powered off. (3) Connect the interface cable to the parallel interface port on the back of the equipment and

secure it with the lock wires.

(4) Connect the other end of the interface cable to the printer port of your computer and secure

it with the two screws. (5) Power on your computer. (6) Plug the equipment's power cord into a wall socket.

Host computer

Interface cable

Lock wires

II - 2

Installing the update data onto the flash ROM of the facsimile equipment

(1) Load the floppy disk which stores the update data and transfer utility into the floppy disk

drive of your computer.

(Or, copy the update data and transfer utility onto the same directory of the hard disk.) (2) Click the Start button, point to Programs, and then click MS-DOS Prompt to open an MS-

DOS window. (3) Type the drive letter where the update data and transfer utility are located. If it is a floppy

disk drive, type A:\ from the command line and press the ENTER key. (4) Check that your computer is connected with the facsimile equipment correctly. (5) To start the transfer utility transmitting the update data to the flash ROM of the facsimile

equipment, type the following:

A:\ICEN filename /b

Then press the ENTER key.

The equipment beeps and shows the "CONNECTING" on the LCD for one second.

Then, the equipment shows the "DOWNLOADING" on the LCD and starts receiving data

downloaded from the host computer.

During downloading, the equipment beeps intermittently.

Upon completion of the downloading, the equipment beeps continuously.

CHAPTER III.

THEORY OF OPERATION

CONTENTS

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

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

2.1Scanner Mechanism.............................................................................. III-3

2.1.1Document feeding and ejecting mechanism................................... III-3

2.1.2Document scanning mechanism..................................................... III-3

2.2Laser Printing Mechanism...................................................................... III-4

2.2.1Paper pulling-in, registration, feeding, and ejecting mechanism..... III-4

2.2.2Print process mechanism................................................................ III-6

(1) Charging process.................................................................... III-7

(2) Exposing process.................................................................... III-7

(3) Developing process................................................................. III-8

(4) Transferring process................................................................ III-8

(5) Erasing process....................................................................... III-8

2.2.3Heat-fixing mechanism................................................................... III-9

2.3Sensors and Actuators........................................................................... III-10

3. CONTROL ELECTRONICS........................................................................... III-12

3.1Configuration...........................................................................................III-12

3.2Main PCB................................................................................................III-13

3.3Relay PCB..............................................................................................III-23

3.4NCU PCB................................................................................................III-24

3.5Control Panel PCB................................................................................. III-27

3.6Power Supply PCBs............................................................................... III-28

[ 1 ]Low-voltage power supply PCB.................................................. III-28

[ 2 ]High-voltage power supply PCB................................................. III-29

III – 1

1. OVERVIEW

Fax Control Section Laser Printing Control Section

PC/AT

MAC

RS-232C RS-422

NCU

Handset

Line

Speaker

Fax data

Printer data

Control panel

Scanner unit

Paper feeding mechanism

Low- and high-voltage power supplies

Laser printing unit

RS-232C

(Modular connector)

Centronics parallel interface

Optional serial interface

(Extended I/O connector)

[MFC6550MC/7550MC/ 7650MC/9000/9500]

[FAX3550/3650/ 8000P/8200P]

[MFC4450/ 4550/4550plus/ 6550MC/7550MC/7650MC/ 9000/9500]

- LED array

- CCD unit

- Scanner motor

Charging, exposing, developing, transferring, erasing, and heat-fixing processes

- Electrical charger

- Laser unit (including the polygon motor)

- Laser-sensitive drum

- Developer roller

- Transfer roller

- Eraser lamp

- Heater roller

- Main motor

III – 2

2. MECHANISMS

The equipment is classified into the following mechanisms:

■ SCANNER MECHANISM – Document feeding and ejecting mechanism – Document scanning mechanism

■ LASER PRINTING MECHANISM – Paper pulling-in, registration, feeding, and

ejecting mechanisms

– Print process mechanism (consisting of

charging, exposing, developing, transferring, and erasing processes)

– Heat-fixing mechanism

■ SENSORS AND ACTUA TORS

Paper pulling-in and registration mechanism

Paper ejecting mechanism

Print process mechanism

Heat-fixing mechanism

Document scanning mechanism

Document feeding and ejecting mechanism

SCANNER MECHANISM

With paper feeding mechanism

LASER PRINTING MECHANISM

III – 3

2.1 Scanner Mechanism

Document stacker

Document feed roller ASSY

Document pressure bar

Document take-in roller ASSY

2nd mirror

Separation roller ASSY

LED array

1st mirror

Document tray

(Front)

Document scanning mechanism

Document feeding and ejecting mechanism

Document ejection roller ASSY

Document

ADF parts

Document rear sensor actuator

2.1.1 Document feeding and ejecting mechanism

This mechanism consists of the document stacker, automatic document feeder (ADF), document feed roller ASSY, and document sensors. (For details about the sensors, refer to Section 2.3.)

If the operator sets documents on the document stacker and starts the scanning operation, the scanner motor rotates so that the ADF (which consists of the document take-in roller ASSY, separation roller ASSY, ADF parts and nip-related parts) feeds those documents into the equipment, starting from the bottom sheet to the top, page by page. Each document advances with the document feed roller ASSY to the scanner, and then it is fed out of the equipment with the document ejection roller ASSY.

2.1.2 Document scanning mechanism

The scanner uses a charge coupled device (CCD) image sensor. As illustrated above, the LED array illuminates a document and the reflected light of the

scanned image data is transmitted via the mirrors into the lens which reduces the scanned data so as to form the image on the CCD.

Document front sensor actuator

Nip-related parts

Lens

CCD unit

III – 4

2.2 Laser Printing Mechanism

2.2.1 Paper pulling-in, registration, feeding, and ejecting mechanism

Pull-in roller drive gear

Main motor

Gear drive unit

Heater roller drive gear

Paper ejection roller drive gear

Drum drive gear

Laser-sensitive drum

Multi-purpose sheet feeder

Paper ejecting mechanism

Paper pulling-in and registration mechanism

Paper feeding mechanism

Sheet feeder cover

Paper

Pull-in roller

Hopper

Registration sensor actuator

Registration roller

Paper tray

Heater roller

Paper ejection roller

Paper ejection sensor actuator

III – 5

Paper pulling-in and registration mechanism

The paper pulling-in and registration mechanism consists of the pull-in roller gear (incorporated in the multi-purpose sheet feeder), planetary gear system, paper feed solenoid, solenoid lever, clutch release lever, and registration sensor. (For the details about the sensor, refer to Section 2.3.)

If the main motor rotates clockwise, the rotation is transmitted to the intermediate gear of the planetary gear system. As the intermediate gear rotates, the pull-in roller drive gear also rotates since the clutch gear is locked by the solenoid lever and the clutch release lever. Accordingly, the pull-in roller in the multi-purpose sheet feeder rotates to pull in paper into the equipment, a sheet at a time.

If the paper feed solenoid is retracted and the clutch release lever is operated according to the cam profile of the pull-in roller gear so as to release the clutch gear, the clutch gear rotates and the pull-in roller drive gear does not rotate. In this way, the clutch gear switches the transmission of the motor rotation on and off to the pull-in roller drive gear.

The solenoid on/off timing and the clutch release lever timing allow this mechanism to pull in a sheet and register it against the registration roller.

Paper feeding and ejecting mechanism If the main motor rotates clockwise, the rotation is transmitted via the gear train to the drum

drive gear, heater roller drive gear, and paper ejection roller drive gear. After the paper passes through the heat-fixing process, it will be ejected onto the paper tray. If the leading edge of the paper pushes up the actuator of the paper ejection sensor, the

photo sensor becomes opened, signaling the start of paper ejection. If the trailing edge has passed through the sensor actuator, the sensor becomes closed, signaling the completion of paper ejection. Then, the main motor stops rotation.

Paper ejection roller drive gear

Gear drive unit

Heater roller drive gear

Drum drive gear

Gear 20/90

Main motor

Pull-in roller drive gear

Intermediate gear Clutch gear

Solenoid spring

Clutch release lever

Solenoid lever

Clutch spring

Paper feed solenoid

(Front)

Planetary gear system

III – 6

2.2.2 Print process mechanism

The print process unit works with laser beam, electrical charges, and toner. The graph below shows the transition of electrical charge on the surface of the laser-sensitive drum through the five processes: charging, exposing, developing, transferring, and erasing processes.

+1000

+700

+400 +300

(a)

(b)

Time

A single cycle of laser-sensitive drum operation

Electrical charge on the drum surface (V)

1 Charges the drum surface positively. 2 Exposes the drum surface to a laser beam to

form a latent image and develops the latent image with toner.

(a) Unexposed area (Non-image area) (b) Exposed area (Image area)

3 Transfers the toner-formed image from the

drum to paper.

4 Erases the residual potential.

Paper

Transfer roller

Drum unit

Laser-sensitive drum

Cleaner roller

Charger (Corona wire)

Toner sensor

Toner cartridge

Cover glass

Laser unit

Polygon mirror

Polygon motor

Mirror

Toner augers

Developer roller

Toner supply roller

III – 7

(1) Charging process

The high-voltage power supply applies DC bias to the corona wire to generate ion on the grid. The ion uniformly charges the surface of the laser-sensitive drum to approx. 1000V which is kept by the varister grounding the grid to the frame.

---

Laser-sensitive layer

Aluminum drum

Drum

Grid

Varister

Corona wire

High-voltage power source

Approx. 280V

Positive charging source

Paper

Laser-sensitive drum

Laser beam

f θ lens

Polygon mirror

Polygon motor

Lens

Laser diode

Laser detector

Laser beam

(2) Exposing process

When the laser-sensitive drum holds a positive electrical charge, the laser beam issued from the laser unit scans the drum according to the print image to expose the drum surface for neutralizing the spots where black should be, forming an electrostatic latent image.

Approx. 1000V

III – 8

(3) Developing process

The developing process develops an electrostatic latent image formed on the drum in the exposing process, into a toner image.

The developer roller attracts the toner particles fed from the toner cartridge by the toner supply roller, and then conveys them to the contact section with the laser-sensitive drum.

On the contact section between the developer roller and drum, the positive toner particles stick to the neutralized spots on the drum according to the principles of attraction and repulsion, transforming a latent image into a toner image.

The toner augers (which agitate toner particles in the chamber) and the blade allow toner particles to be fed onto the developer roller at an even thickness.

Laser-sensitive drum

DC bias

Toner supply roller

Eraser lamp

Transfer roller

Switch “a” (ON for the transfer process)

Switch “b” (ON for repulsing toner from the transfer roller)

(4) Transferring process

When a paper passes between the drum and the transfer roller, the switch “a” (see the above illustration) is turned on to negatively charge the transfer roller. The toner is positive, so the toner image formed on the drum will be transferred onto the paper according to the same principle as for the developing process.

If the toner image fails to stick to the paper due to paper jam or other errors, it will stick to the transfer roller. To repulse this toner, the switch “b” (see the above illustration) is turned on to positively charge the transfer roller. The toner returns from the transfer roller to the drum.

Cleaning the drum In the transferring process, not all the toner particles on the drum are transferred onto the

paper but some toner particles remain on the drum. The cleaner roller cleans the drum surface and collects the residual toner. When printing starts or during non-printing, the toner collected on the cleaner roller will be discharged onto the drum and returned to the chamber through the developer roller for recycling in the subsequent developing process.

(5) Erasing process

The eraser lamp emits light to expose the drum surface, which erases the residual electrical charge.

Toner augers

Blade

Developer roller

Cleaner roller

Chamber

Toner

III – 9

2.2.3 Heat-fixing mechanism

Pressure roller

(Paper ejection roller)

Paper

(Paper ejection sensor actuator)

Heat-fixing unit

Heater roller (including the FU lamp)

As the paper passes between the heater roller and the pressure roller in the fixing unit, the heater roller fuses the toner on the paper.

III – 10

2.3 Sensors and Actuators

This equipment has ten sensors: two microswitches, six photosensors and two thermisters as described below.

Sensor name Type Located on Hook switch sensor Microswitch Hook switch PCB

Cover sensor Microswitch Relay PCB Registration sensor Photosensor (PC1) Relay PCB Sheet feeder cover sensor Photosensor (PC2) Relay PCB Paper ejection sensor Photosensor (PC1) High-voltage power supply PCB Document front sensor Photosensor (PC1) Document sensor PCB Document rear sensor Photosensor (PC2) Document sensor PCB Toner sensor Photosensor (PH1) Toner sensor PCB (on the laser unit) Toner thermister P1 Toner sensor PCB (on the laser unit) Heater thermister __ Fixing unit

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

• Cover sensor which detects whether the top cover is closed.

• Registration sensor which detects the leading and trailing edges of paper, which allows the controller to determine the registration timing and check paper jam.

• Sheet feeder cover sensor which detects whether the sheet feeder cover is closed.

• Paper ejection sensor which detects whether the recording paper goes out of the equipment.

• Document front sensor which detects the presence of documents.

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

• Toner sensor which detects whether there is toner or a toner cartridge is loaded.

• Toner thermister which detects the temperature of the toner cartridge.

• Heater thermister which detects the temperature of the heater roller of the fixing unit.

These photosensors are a photointerrupter consisting of a light-emitting diode and a lightsensitive transistor. Each of them has an actuator separately arranged as shown on the next page.

III – 11

Hook switch sensor (Microswitch)

Hook switch sensor actuator

(Low-voltage power supply PCB)

(Main PCB)

(Relay PCB)

Toner thermister

(On back of PCB)

Toner sensor

Registration sensor actuator

Registration sensor (Photosensor)

(Eraser lamp board)

(Fixing unit)

(Document sensor PCB)

Document front sensor actuator

Document front sensor (Photosensor)

(Toner sensor PCB)

Sheet feeder cover sensor actuator Sheet feeder cover sensor

(Photosensor)

Cover sensor actuator Cover sensor (Microswitch)

(High-voltage power supply PCB)

Document rear sensor actuator Document rear sensor

(Photosensor)

Heater thermister

Paper ejection sensor actuator

Paper ejection sensor (Photosensor)

Location of Sensors and Actuators

III – 12

3. CONTROL ELECTRONICS

3.1 Configuration

The configuration of the facsimile equipment is shown below.

Main PCB

Control panel PCB

Relay PCB

ASIC

MODEM

Laser unit

Toner sensor PCB *

Fixing Unit

Heater thermister

Heater (FU lamp)

Fan 2

Main motor

Solenoid

AC line

Low-voltage power supply PCB

Document sensor PCB

CCD unit

LED array

Scanner motor

Speaker

NCU PCB

Line External TEL Handset

36-pin

P15

P1 8-pin

P2 40-pin

P3 30-pin

5-pin

P13 26-pin

P18

2-pin 4-pin

P9 P8

2-pin

5-pin

P10

6-pin

P16

2-pin

(Note)

P11

2-pin

5-pin 5-pin

4-pin

12-pin

High-voltage power supply PCB

Fan 1

Eraser lamp board

3-pin 4-pin

LASER PRINTING UNIT

SCANNER UNIT

P3 P2

*1On the relay PCB are these sensors:

• Cover sensor

• Sheet feeder cover sensor

• Registration sensor

*2On the toner sensor PCB are these sensors:

• Toner sensor

• T oner thermister

On the high-voltage power supply PCB is the paper ejection sensor.

On the document sensor PCB are these sensors:

• Document front sensor

• Document rear sensor

On the hook switch PCB is the hook switch sensor.

Configuration

Polygon motor

Laser diode

Hook switch PCB

Extended RAM connector

(Note) 12-pin: U.S.A. versions

18-pin: European and Asian

versions

Centronics parallel interface (MFC4450/ 4550/4550plus/ 6550MC/7550MC/ 7650MC/9000/9500)

Modular connector for PC interface (FAX3550/3650/ 8000P/8200P)

Extended I/O connector (MFC6550MC/ 7550MC/7650MC/ 9000/9500)

11-pin

III – 13

Centronics parallel interface

(FAX3550/3650/8000P/8200P)

DRAM(s)

ROMs

Extended RAM connector

MODEM

Extended I/O connector for optional serial interface board (RS-232C and RS-422)

E2PROM(s)

Analog switch operational amplifiers

Amplifiers

Scanner motor driver

Image processor

Main motor driver

Fan 2

Main motor

Solenoid

Low-voltage power supply PCB

Document sensor PCB

Scanner motor

Speaker

NCU PCB

Hook switch PCB

Main PCB

ASIC

Relay PCB

Control panel

3.2 Main PCB

The main PCB, which is the nucleus controlling the entire operation of the equipment, consists of a FAX engine (ASIC), memories, MODEM, motor drive circuits, sensor detection circuitry, and analog circuits for scanning, printing, and power transmission shifting.

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

Block Diagram of Main PCB

Modular connector for PC interface (RS-232C)

(MFC6550MC/7550MC/ 7650MC/9000/9500)

(MFC4450/ 4550/4550plus/ 6550MC/7550MC/ 7650MC/9000/9500)

III – 14

Main PCB Circuit Diagram 1/7

1 FAX engine (ASIC) which manages the I/Os, memories, drivers and image proces-

sor as well as controlling the laser printing unit.

2 8-pin modular connector for the PC interface (RS-232C), provided on the FAX3550/

3650/8000P/8200P.

III – 15

DRAM No.

#10 #11 #12 #15

Model FAX3550/MFC4550 –– 4M x 8 bits 4M x 8 bits ––

FAX8000P/MFC6550MC/ –– 4M x 8 bits 4M x 8 bits –– 9000/9500

MFC7550MC –– –– –– 16M x 16 bits

–– : Not installed

#12

#15

#11

#10

#2 #3

Main PCB Circuit Diagram 2/7

1 FAX3550/3650/8000P/8200P/MFC4450/4550/6550MC/7550MC/9000/9500:

ROM (8-megabit, 512K x 16 bits) which stores programs. MFC4550plus/7650MC: Flash ROM (8-megabit) which stores programs.

2 ROM (8-megabit, 512K x 16 bits)

FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus: This ROM is used only on the qualification machines for demonstration.

MFC6550MC/7550MC/7650MC/9000/9500: This ROM stores the PCL4 (Driver programs for high-quality print).

3 DRAMs

FAX3550/8000P/MFC4550/6550MC/7550MC/9000/9500:

FAX3650/8200P/MFC4450/4550plus/7650MC:

DRAM No.

#10 #15

Model FAX3650/8200P –– 16M x 16 bits

MFC4450 4M x 16 bits 4M x 16 bits MFC4550plus 4M x 16 bits 4M x 16 bits MFC7650MC –– 16M x 16 bits –– : Not installed

III – 16

4 E2PROMs which store user settings.

FAX3550/8000P/MFC4550/6550MC/7550MC/9000/9500:

E2PROM No.

#2 #3

Model FAX3550 16K x 1 bit 16K x 1 bit

MFC4550 –– 16K x 1 bit MFC6550MC –– 16K x 1 bit FAX8000P/MFC6550MC/ 16K x 1 bit 16K x 1 bit

9000/9500

E2PROM No.

#2 #3

Model FAX3650/8200P 16K x 1 bit 16K x 1 bit

MFC4450 –– 16K x 1 bit MFC4550plus –– 16K x 1 bit MFC7650MC –– 32K x 1 bit

FAX3650/8200P/MFC4450/4550plus/7650MC:

–– : Not installed

5 Extended RAM port which allows you to add a memory up to two megabytes. 6 Extended I/O connector for an optional serial interface board RS-100M which supports

the RS-232C and RS-422. (Only for the MFC6550MC/7550MC/7650MC/9000/9500)

III – 17

Main PCB Circuit Diagram 3/7

1 Connector for the document sensor PCB

1-1: Current sink transistor for driving the LED array 1-2: Synchronous clocks for the CCD unit 1-3: Image signal from the CCD unit 1-4: Signal from the document front sensor

1-5: Signal from the document rear sensor 2 Connector for the control panel 3 Image signal processor

FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus: 200 dpi MFC6550MC/7550MC/7650MC/9000/9500: 300 dpi

1-1

1-4 1-5

1-3

1-2

III – 18

Main PCB Circuit Diagram 4/7

1 Operational amplifiers for modem-to-line interface

1-1: RIN, signal from line to modem

1-2: TXO, signal from modem to line 2 Modem 3 Short pin

Mounted on the Turkish versions only.

1-1

1-2

III – 19

Main PCB Circuit Diagram 5/7

1 Connector for the relay PCB

1-1: Laser drive signals

1-2: High-voltage power supply control signals

1-3: Eraser lamp ON/OFF signal

1-4: Fan 1 control signal

1-5: Signal input from the paper ejection sensor

1-6: Signal input from the registration sensor

1-7: Signal input from the sheet feeder cover sensor

1-8: Signal input from the cover sensor

1-9: Signal input from the toner sensor

1-10: Signal input from the heater thermister

1-11: Signal input from the toner thermister 2 Heater control circuit which prevents the heater from overheating due to ASIC or soft-

ware malfunction. (The ASIC controls the HTON signal with the hysteresis characteristics for stabilized heater control.)

3 Connector for the low-voltage power supply 4 Main motor driver which controls recording paper feeding and drum rotation. 5 Fan 2 driver circuit 6 Paper pull-in solenoid circuit 7 Scanner motor driver and its control circuitry 8 Signal input from the hook switch

1-1

1-2

1-3 1-4 1-5 1-6 1-7 1-8 1-9 1-10 1-11

III – 20

Main PCB Circuit Diagram 6/7

1 Centronics parallel interface circuitry (for the MFC4450/4550/4550plus/6550MC/

7550MC/7650MC/9000/9500) Connector P15 is compatible with the standard Centronics parallel interface.

2 Backup circuit for the calendar clock of the control panel

2-1: For FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus/9000

2-2: For MFC6550MC/7550MC/7650MC/9500 (This circuit backs up also the im-

age and voice data.)

2-1

2-2

III – 21

Main PCB Circuit Diagram 7/7

1 Connector for the NCU PCB

CMLL: NCU relay ON/OFF signal

PLS: Dial pulse output

TLOF: Off-hook signal which is active Low for the external telephone.

CI: Call signal which is active Low.

TXD: Line output signal from the MODEM

TLSL: Handset microphone signal

RL1: Line input signal to the MODEM

RL2: Line monitor signal

ADLC: Line current detection input

DASEND: Output level matching signal

DAST: Side tone level matching signal (Only in the European versions.)

DPS: External telephone switching signal

EAT: Earth function signal

POL: Polarity inversion detection signal

2-1

2-2

2-3

2-5

2-6

2-4

2-7

3-1

3-2

4-1

4-2

III – 22

2 Switching devices that are controlled by the ASIC

2-1: Device TEL. If 0, the equipment works as a telephone; if 1, it sends a fac-

simile message.

2-2: Device HSPLY. If 0, the equipment works as a telephone; if 1, it plays back

a TAD recorded message.

2-3: Device TADH. If 0, the equipment works regularly; if 1, it allows you to

record a message through the microphone.

2-4: Device CMLH. If 0, the equipment is placed in monitor mode; if 1, it is nor-

mally connected to the line.

2-5: Device RNG. If 0, the speaker rings; if 1, it transfers control to the device

MSL.

2-6: Device MSL. If 0, the speaker works for converting line signals to sound; if

1, it works for playing back a TAD recorded message.

2-7: Device MUTE that mutes the receiver tone. 3 Speaker amplifiers

3-1: For FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus/9000

3-2: For MFC6550MC/7550MC/7650MC/9500 4 Speaker volume control circuitry

4-1: VOL1 that controls the speaker volume to two levels: High and Low.

4-2: VOL2 that augments VOL1 to handle four levels: High, Medium-high, Me-

dium-low, and Low. (MFC6550MC/7550MC/7650MC/9500 only)

III – 23

3.3 Relay PCB

Relay PCB Circuit Diagram

1 Connector for the main PCB 2 Registration sensor (PC1) circuit 3 Sheet feeder cover sensor (PC2) circuit 4 Cover switch (SW1) 5 Connector for the high-voltage power supply PCB 6 Connector for the toner sensor PCB 7 Connector for the laser diode of the laser unit 8 Switching circuit which feeds 24V power to the polygon motor during the printing pro-

cess.

9 Connector for the polygon motor

III – 24

3.4 NCU PCB

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

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

1 Surge absorber 2 Noise filters 3 Line relay (CML relay) 4 Line transformer 5 Circuit related to the line transformer 6 High-impedance transformer circuit 7 Calling signal detector 8 Loop current detector 9 Dial pulse generator : Telephone circuit A Reference voltage generation circuit for the operational amplifier in ⑤.

III – 25

NCU PCB Circuit Diagram (European versions)

1 Surge absorber 2 Noise filters 3 Line relay (CML relay) 4 Line transformer 5 Circuit related to the line transformer 6 High-impedance transformer circuit 7 Calling signal detector 8 Loop current detector 9 Dial pulse generator & loop current detector : Telephone circuit A Reference voltage generation circuit for the operational amplifier in ⑤. B Pulse shaper C Line current detection input circuit

III – 26

• The primary function of the NCU (which is shared by facsimile and telephone units) is to

switch a line to the facsimile unit or to the telephone, which is carried out by the line relay.

• Since the direct connection of a facsimile equipment to the line is not allowed for protect-

ing the line, it is essential to insert a line transformer between the line and the facsimile equipment to insulate them from each other in the direct current band.

The above two components, line relay and line transformer, are the minimum requirements for the NCU of the facsimile equipment.

• If an external telephone is connected to the facsimile equipment, the NCU should have a

loop current detector to identify the hook state by detecting the loop current.

• If the facsimile equipment has an automatic answering facility (TAD), the NCU should be

equipped with a calling signal detector which detects a calling signal and tells it to the CPU in the FAX engine (ASIC).

• The circuit related to a line transformer allows the line transformer to be invariant by se-

lecting the constants of the parts in this circuit so as to conform to the communications regulations or codes of each country.

In addition to the above basic components of the NCU, the following components are also required depending upon additional functions of the facsimile equipment:

• The dial pulse generator generates dial pulses within the facsimile equipment.

• The surge absorber is a protection circuit which absorbs lightning surges.

• The noise filter eliminates noise including radiation noise in order to prevent them from

flowing out onto the communications line.

• The high-impedance transformer circuit detects the remote activation, and F/T switching

sent from the line in ON-HOOK state without any interference to the line.

• The telephone circuit includes an amplifier that amplifies output signals of the handset mi-

crophone. It also includes a transistor that amplifies receive signals from the communications lines to sound the handset receiver.

III – 27

3.5 Control Panel PCB

The control panel PCB and the main PCB communicate with each other by serially transmitting commands and data.

The control panel unit consists of a gate array, an LCD, and LEDs, which are controlled by the gate array according to commands issued from the FAX engine on the main PCB.

The calendar clock is backed up by the backup circuit on the main PCB. The panel FPC is a flexible keyboard PCB which integrates the key matrix having rubber

keytops.

FAX Engine

Backup Circuit

+5V

Reset Circuit

+5V

POWER

I/O Ports

Serial Communications Ports

RESET

+5B

LED

Panel FPC

(Key Matrix)

LCD

Main PCB

Control Panel PCB

SDIN

SDOUT

PCLK

Gate Array

Control Panel PCB and its Related Circuit

III – 28

3.6 Power Supply PCBs

[ 1 ] Low-voltage power supply PCB

The low-voltage power supply uses the switching regulation system to generate DC power (+5V and +24V) from a commercial AC power supply for the driver circuits. The +5V source is fed to the logic, control panel, sensors, CCD unit, etc.; the 24V source is fed to the motors, solenoid, fans, LED array, and the high-voltage power supply PCB.

The low-voltage power supply also feeds AC power to the heater of the fixing unit.

Low-voltage Power Supply Circuit

Heater Circuit

Thermal

Fuse

Lightning

Surge

Absorber

Feedback

Line

Filter

Fuse

Rectifier

Switching

Circuit

24V

Detector

Regulation

Circuit

24V

FU lamp

(Heater)

(Driver circuits)

III – 29

[ 2 ] High-voltage power supply PCB

This power supply generates high-voltage power sources from the 24V source fed from the low-voltage power supply for charging, developing, and transferring in the laser printing process.

High-voltage Power Supply Circuit

24VI

Control 1

(TIDN TAIDEN)

Control 2

(GENZ GENZOU)

Control 3A

(TENH TESHAH)

Control 3B

(TENL TESHAL)

GND

Fuse Type Resistor

0.22 1/6w

Current

Regulator

(250µA)

B1 Q1

B51 Q51

B52

Q56

VR53

VR33 VR31 VR34

Voltage

Regulator

(600 ± 10V)

(275 ± 7V)

Current

Regulator

(-3.0µA)

Voltage

Regulator

(1.8kV)

VR201

Voltage

Regulator

(1.0kV)

Z201

910

GRID

OUT3

OUT2

OUT1

Developer Roller

Laser-sensitive

Drum

Corona Wire

Transfer Roller

VR101

Voltage

Regulator

(275V)

VR32

Voltage

Regulator

(700V)

VCLN

DRMBIAS

Cleaner Roller

Grid

CHAPTER IV.

DISASSEMBLY/REASSEMBLY

AND LUBRICATION

CONTENTS

1. DISASSEMBLY/REASSEMBLY.................................................................... IV-1

■Safety Precautions.................................................................................... IV-1

■Preparation................................................................................................IV-3

■How to Access the Object Component...................................................... IV-3

■Disassembly Order Flow........................................................................... IV-4

1.1 Top Cover...............................................................................................IV-5

1.2 Handset Mount and Hook Switch PCB (for handset-equipped versions)

Side Cover (for non-handset versions)............................................................ IV-5

1.3 Multi-purpose Sheet Feeder.................................................................. IV-6

1.4 Control Panel ASSY.............................................................................. IV-6

1.5 Panel Rear Cover and Control Panel.................................................... IV-7

1.6 Document Feed Roller ASSY and Ejection Roller ASSY...................... IV-8

1.7 Inner Cover............................................................................................IV-8

1.8 Scanner Frame ASSY........................................................................... IV-10

1.9 Insulation Cover.................................................................................... IV-12

1.10Fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator.................. IV-13

1.11Laser Unit...............................................................................................IV-15

1.12Bottom Plate..........................................................................................IV-16

1.13Low-voltage Power Supply PCB........................................................... IV-17

1.14High-voltage Power Supply PCB and Fan 1......................................... IV-18

1.15Main PCB...............................................................................................IV-19

1.16Relay PCB.............................................................................................IV-21

1.17Shield Bracket and NCU PCB ASSY.................................................... IV-22

1.18Gear Drive Unit......................................................................................IV-23

1.19Duct Cover, Fan 2, and Speaker........................................................... IV-25

1.20Sheet Feeder Cover Sensor Actuator, Registration Sensor Actuator,

and Cover Sensor Actuator................................................................... IV-26

1.21Microphone (MFC9500 only)........................................................................... IV-27

1.22Cleaning of High-voltage Contacts and Grounding Contacts................ IV-28

1.23Harness Routing................................................................................... IV-29

2. LUBRICATION................................................................................................IV-30

IV – 1

1. DISASSEMBLY/REASSEMBLY

■ Safety Precautions

To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work.

(1) Always unplug the power cord before replacing parts or units. When having access to

the power supply, be sure to unplug the power cord from the power outlet.

(2) When servicing the optical system of the laser printing unit, be careful not to place

screwdrivers or other reflective objects in the path of the laser beam. Be sure to take off any personal accessories such as watches and rings before working on the printer. A reflected beam, though invisible, can permanently damage your eyes.

(3) If the equipment has been printing, allow the fixing unit sufficient time to cool down. It is

HOT! (4) Be careful not to lose screws, washers, or other parts removed for parts replacement. (5) Do not remove gears from the document LF roller ASSY or ejection roller ASSY if at all

possible. Once removed, they will become unusable and new gears will have to be put

back in. (6) When using soldering irons and other heat-generating tools, take care not to damage

the resin parts such as wires, PCBs, and covers. (7) Before handling the PCBs, touch a metal portion of the equipment to discharge static

electricity; otherwise, the electronic parts may be damaged due to the electricity

charged in your body. (8) When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum

foil.

WARNING

For the MFC6550MC/7550MC/7650MC/9000/9500 which has a nickel-hydrogen battery

on the main PCB, be sure to remove that battery before transporting the PCB (in alu-

minium foil). Failure to do so may result in a short circuit, overcurrent flow, or fire. (9) Be sure to reinsert self-tapping screws correctly, if removed.

(10) Tighten screws to the torque values listed on the next page. (11) When connecting or disconnecting cable connectors, hold the connector bodies not the

cables. If the connector has a lock, always slide the connector lock to unlock it.

(12) Before reassembly, apply the specified lubricant to the specified points. (Refer to Sec-

tion 2 in this chapter.)

(13) After repairs, check not only the repaired portion but also that the connectors and other

related portions function properly before operation checks.

IV – 2

Tightening Torque List

Location Screw type Q'ty Tightening torque (kgf•cm) Handset mount Taptite, cup B M3x10 2 5 ±1 Hook switch PCB Taptite, cup B M3x6 1 5 ±1 Panel rear cover Taptite, cup B M3x8 2 3 ±1 Inner cover Taptite, cup B 4x12 2 8 ±1

Taptite, cup B 3x10 3 8 ±1 Scanner motor Screw, pan (washer) 3x8DB 1 7 ±2 Fixing unit Taptite, bind B 4x12 1 10 ±1

Taptite, bind B 3x10 2 8 ±1 Laser unit Taptite, bind B 4x12 3 8 ±1 Toner sensor PCB Taptite, cup B 3x8 1 6 ±1 Bottom plate Taptite, cup B 4x12 5 8 ±1

(On the main shield bracket) Taptite, cup S 3x6 2 5 ±1

(On the gear drive unit) Taptite, cup S 3x6 2 8 ±1 Grounding wire Screw, pan (washer) 4x8DB 1 7 ±2 Low-voltage power supply PCB Taptite, bind 4x12 1 10 ±1 High-voltage power supply PCB Taptite, bind 4x12 1 10 ±1 Interface plate Taptite, bind 3x6 3 5 ±1 Relay PCB Taptite, bind B 4x12 1 10 ±1 Shield bracket Taptite, cup B 3x10 3 5 ±1 NCU PCB ASSY Taptite, cup B 3x10 1 5 ±1 Drive unit Taptite, cup B 4x20 3 12 ±1

Taptite, bind B 4x12 1 10 ±1

IV – 3

■ Preparation

Prior to proceeding to the disassembly procedure, (1) Unplug

- the modular jack of the telephone line,

- the modular jack of the curled cord (and remove the handset), and

- the modular jack of an external telephone set if mounted. (Not shown below.)

(2) Remove

- the wire extension,

- the document tray,

- the paper tray, and

- the drum unit (with the toner cartridge loaded).

■ How to Access the Object Component

• On the next page is a disassembly order flow which helps you access the object component. To remove the relay PCB, for example, first find it on the flow and learn its number (F in this case). You should remove parts numbered 1, 3, B, and E so as to access the relay PCB.

• Unless otherwise specified, the disassembled parts or components should be reassembled in the reverse order of removal.

Handset and curled cord

Drum unit (with toner cartridge loaded)

Wire extension

Telephone line cord

Paper tray

Document tray

IV – 4

■ Disassembly Order Flow

Control panel ASSY

Panel rear cover

- Document pressure

bar

- ADF parts

- Nip-related parts

Control panel

- Control panel PCB

- FPC key

Document feed

roller ASSY

Document ejection

roller ASSY

Inner cover

Scanner frame ASSY

Document sensor PCB

Document sensor actuators

Separation roller ASSY

Document take-in roller

ASSY

Mirrors

Ejection leaf

spring

Scanner motor

Pressure roller

ASSY

• Sheet feeder

cover sensor

actuator

• Registration

sensor actuator

NCU PCB ASSY

Cover sensor

actuator

Shield bracket

Relay PCB

Main PCB

- Duct cover

- Fan 2

- Speaker

Fan 1

High-voltage

power supply PCB

Bottom plate

Multi-purpose

sheet feeder

Top cover

Laser unit

Low-voltage

power supply

PCB

Gear drive unit

Main motor

Gears

Solenoids

Handset mount*

Side cover**

Hook switch PCB*

*For handset-equipped versions

**For non-handset versions

Microphone

(MFC9500 only)

Fixing unit

FU lamp

Insulation cover

Paper ejection sensor actuator

IV – 5

1.1 Top Cover

(1) Open the top cover. (2) Push the arm of the top cover outwards with your thumb to unhook it from the main

cover.

(3) Turn the top cover upright and slide it to the rear.

Arm

Main cover

Top cover turned upright

Top cover

Bosses

Main cover

(Non-handset versions)

Side cover**

Hook switch PCB*

Hook switch sensor*

Hook switch harness*

(Handset-equipped versions)

Hook switch*

Handset mount*

1.2 Handset Mount and Hook Switch PCB (for handset-equipped versions) Side Cover (for non-handset versions)

(1) Remove the two screws from the handset mount* or the side cover.** (2) Twist the handset mount* or the side cover** so that it tilts over to the left and its upper

end works out of the bosses provided on the main cover.

(3) To remove the hook switch PCB*, disconnect the hook switch harness* and remove the

screw.

*For handset-equipped versions

**For non-handset versions

IV – 6

1.3 Multi-purpose Sheet Feeder

(1) Pull either one of the right and left tabs provided on the main cover outwards and

slightly lift up the multi-purpose sheet feeder, then release the other end of the sheet feeder also.

(2) Take up the sheet feeder.

Tab on the main cover

■ Reassembling Notes

• To install the sheet feeder, align the right and left end of the front edge with the bosses of the main cover and then push down the rear.

Boss

Multi-purpose sheet feeder

1.4 Control Panel ASSY

(1) Slightly open the control panel ASSY as shown below. (2) Push the right and left arms of the control panel ASSY outwards with your thumbs to

unhook them from the bosses provided on the main cover, then slide the control panel ASSY to the rear.

(3) Disconnect the main-panel harness from the control panel PCB.

Arm of the control panel ASSY

Control panel PCB

Control panel ASSY

Main-panel harness

Arm

IV – 7

1.5 Panel Rear Cover and Control Panel

(1) Place the control panel ASSY upside down. (2) Remove the document pressure bar, ADF parts, and nip-related parts from the panel

rear cover. (3) Remove the two screws from the panel rear cover. (4) While lifting up the front edge of the panel rear cover, unhook it from the 15 pawls "X"

provided on the control panel. (5) Unhook the control panel PCB from the three pawls "Y" on the control panel and take it

out together with the FPC key.

FPC key

Control panel (placed upside down)

■ Reassembling Notes

• When installing the spring plate B and separation rubber, align their cutouts with the boss

on the panel rear cover.

Document pressure bar

Spring plate B

Separation rubber

Spring plate A

Panel rear cover

15 "X" pawls

Nip-related parts

Control panel PCB

3 "Y" pawls

ADF parts

IV – 8

1.6 Document Feed Roller ASSY and Ejection Roller ASSY

(1) Push arm rib "A" to the rear, then shift the document feed roller ASSY to the right and

upwards. (2) Push arm rib "B" to the rear, then shift the document ejection roller ASSY to the right

and upwards.

Document feed roller ASSY

Document ejection roller ASSY

1.7 Inner Cover

(1) Remove the five screws. (2) Unlatch the pawl "a" by hand. (3) While lifting up the inner cover, unlatch the four pawls "b" and "c."

NOTE: Take care not to scratch or drop the cover glass on the scanner frame ASSY.

Inner cover

Pinch rollers

Control panel lock (Leaf spring)

Viewed from the left side

"b"

Sponge

"a"

"b"

"B"

"A"

"c"

IV – 9

Main-panel harness

Inner cover

- After installing the inner cover, be sure to put the sponge back into place.

■ Reassembling Notes

• Before putting the inner cover on the main cover, make sure that:

- The control panel locks (leaf springs) are set in the inner cover as shown on the previous page.

- The pinch rollers are set with their fringes facing outwards as shown on the previous page.

- The main-panel harness connector comes out from the cutout provided in the inner cover as shown below.

IV – 10

1.8 Scanner Frame ASSY

(1) You can remove the following parts from the top of the scanner frame ASSY without

taking out the ASSY from the main cover:

• Cover glass. Turn the cover glass up towards you.

• Ejection leaf springs. Remove them while slightly pulling up the front edges.

• Document take-in roller ASSY. Unhook the latch of the gear, take it off, and lift up the ASSY.

• Separation roller ASSY. First unhook the latch of the adjacent gear and take it off, and then remove the separation roller ASSY in the same way as for the document take-in roller ASSY.

• Pressure roller ASSY. While pressing down the leaf springs, remove the ASSY.

• Bar lens and LED array.

• Document front sensor actuator.

• Document rear sensor actuator. While pressing down the leaf spring and pulling the boss "X" provided on the scanner frame ASSY to the front, slightly move the actuator to the left and lift it up.

• Document sensor PCB. Disconnect the CCD harness and LED array harness from the document sensor PCB. Take the main-sensor harness out of the three clamps (see the illustration on the next page) and then disconnect it from the PCB.

PC1

PC2

Document sensor PCB

Document front sensor actuator

Boss "X"

Ejection leaf springs

Bar lens and LED array CCD unit

(Do not remove)

Leaf springs

Document rear sensor actuator

Document take-in roller ASSY

Separation roller ASSY

Pressure roller ASSY

Cover glass

CCD harness

(Front)

PC1: Document front sensor PC2: Document rear sensor

Main-sensor harness connector

CCD harness connector

IV – 11

(2) Before taking out the scanner frame ASSY, make sure that the cover glass is removed

and the main-sensor harness is disconnected.

(3) Slightly lift up the scanner frame ASSY and disconnect the scanner motor harness from

the motor, then take out the ASSY. NOTE: Take care not to scratch the mirrors (see the illustration below), CCD unit, or

bar lens.

NOTE: NEVER remove or replace the CCD unit. Its mounting position has been ad-

justed in the factory.

Sponges

Scanner frame ASSY

Cover glass

(Remove before taking out the scanner frame ASSY .)

Main-sensor harness

Clamps

Document sensor PCB

Sponge

CCD unit

(Do not remove)

Scanner motor harness

Scanner motor

Mirrors

(Front)

Bar lens and LED array

IV – 12

■ Reassembling Notes

• Check that the mirrors and cover glass are not stained. Wipe them with a soft cloth if necessary.

• If you have disassembled the gear train on the right side of the scanner frame ASSY, reassemble it referring to the illustration below.

(Rear)

(Front)

Separation roller gear

Document take-in roller gear

Scanner frame ASSY

Scanner motor gear

(Right side view)

• After installing the scanner frame ASSY, be sure to put the sponges back into place as shown on the previous page.

Insulation cover

Main cover

1.9 Insulation Cover

(1) Lift up the insulation cover.

IV – 13

1.10 Fixing Unit, FU Lamp, and Paper Ejection Sensor Actuator

(1) Remove the screw "a." (2) Lift up the fixing unit and then disconnect the heater harness (blue and brown wires).

Disconnect the heater thermister harness from the eraser lamp board.

(3) Remove the paper ejection sensor actuator from the main cover. (4) To take out the FU lamp from the fixing unit, remove the two screws "b" from the fixing

unit.

(5) Unhook the two latches outwards with the tip of a small flat screwdriver and open the

upper cover. (See the next page.)

(6) Fully open the upper cover and remove it.

"a"

"b" "b"

Fixing unit

Blue heater harness

Eraser lamp board

Brown heater harness

Paper ejection sensor actuator

Heater thermister harness

Paper ejection sensor actuator

IV – 14

(7) Remove the screw "d" and loosen the screw "c." (8) Take the lock plate of the FU lamp with your fingers and pull out the FU lamp from the

heater roller to the left. CAUTION: Never toutch the FU lamp. If you touch it, clean it throughly with alcohol.

Setting the FU lamp

Folded lock plate

Latch

"c" (Loosen this.)

Heater roller

Insert the right edge of the wire into the folded lock plate.

Unhooking the latch

Latch

Lock plate

"d"

FU lamp

"b"

Lower cover

Upper cover

"b"

■ Reassembling Notes

• When setting the FU lamp into the fixing unit, be sure to insert the right edge of the wire into the folded lock plate.

• When installing the paper ejection sensor actuator, hook the spring as shown on the previous page.

IV – 15

1.11 Laser Unit

(1) Remove the three screws. (2) Slightly lift up the laser unit and disconnect the following three things from the relay

PCB:

• Laser diode harness (5-pin)

• Polygon motor flat cable (5-pin)

• Toner sensor harness (4-pin)

NOTE: When handling the laser unit, take care not to touch the inside of the unit,

glass, or mirror. On the small PCB at the right side of the laser unit is a 2-pin connector which

is for the adjustment in the factory. Do not disturb it.

Toner sensor

Toner sensor PCB

Glass

Mirror

Laser unit

Polygon motor flat cable

Laser diode harness

Toner sensor harness

Sponge

Relay PCB

■ Reassembling Notes

• Before putting the laser unit back into place, check for any toner particles, paper dust or dirt, and clean them out.

• When installing the laser unit, make sure that the toner sensor harness is routed through the groove as shown above.

• Make sure that the sponge is placed below the laser unit.

IV – 16

1.12 Bottom Plate

(1) Make sure that the drum unit, top cover, and multi-purpose sheet feeder have been re-

moved. (2) Turn the machine upside down. (3) Remove the nine screws. (4) Slightly lift up the bottom plate and disconnect the grounding wire.

Bottom plate

Grounding wire

Screws (Taptite, cup S3x6)

Screws (Taptite, cup B4x12)

IV – 17

1.13 Low-voltage Power Supply PCB

The illustration below shows the location of the PCBs.

■ Reassembling Notes

• When reassembling the above parts, make sure that the above harnesses are routed

through the clamps provided on the main cover as illustrated in Section 1.23.

Low-voltage power supply PCB

Gear drive unit

Fan 1

High-voltage power supply PCB

Relay PCB

Main PCB

Main cover

(placed

upside down)

NCU PCB (beneath the main PCB)

(Front)

(1) Remove the screw from the low-voltage power supply PCB. (2) Slightly lift up the low-voltage power supply PCB and pull out the power switch support. (3) Disconnect the main–low-voltage harness and heater harness (of the blue and brown

wires) from the low-voltage power supply PCB.

Main–low-voltage harness

(Rear)

Low-voltage power supply PCB

Power cord

Power switch support

Main cover (placed upside down)

Heater harness (blue and brown wires)

IV – 18

1.14 High-voltage Power Supply PCB and Fan 1

(1) Remove the screw and the insulation film. (2) While pressing down the high-voltage power supply PCB, slightly shift it to the front of

the machine. (3) Slightly lift up the high-voltage power supply PCB and disconnect the following four

things:

• Relay–high-voltage flat cable (12-pin)

• Eraser harness (4-pin)

• Fan harness (3-pin)

• Drum grounding harness (2-pin)

NOTE: The fan harness and the drum grounding harness pass through the slot below

the fan motor film.

(4) Take out the fan 1.

Drum grounding harness

(Front)

Relay–high-voltage flat cable

High-voltage power supply PCB

Eraser harness

Fan motor film

Fan 1

Main cover (placed upside down)

Fan harness

Paper ejection sensor

Insulation film

■ Reassembling Notes

• Before reinstalling the high-voltage power supply PCB, check the high-voltage contacts

for any toner particles, paper dust or dirt, and clean them out.

• When reassembling the above parts, make sure that the harnesses are routed on the

main cover as illustrated in Section 1.23.

• Once the fan motor film is removed, you are recommended to use a new film.

• When setting the fan 1, be careful with the installation direction. The name plate should

be face-up (when the equipment is placed upside down).

IV – 19

1.15 Main PCB

(1) Remove the three screws from the interface plate. (2) Pull out the interface plate to the rear of the machine and take out the main PCB from

the shield bracket. (3) Slightly lift up the main PCB and disconnect the following ten harnesses:

• Main motor harness (4-pin), P9

• Scanner motor harness (6-pin), P10

• Main–low-voltage harness (5-pin), P7

• Main-panel harness (5-pin), P5

• Solenoid harness (2-pin), P8

• Fan 2 harness (2-pin), P18

• Speaker harness (2-pin), P16

• Hook switch harness (2-pin), P11

• Main-NCU harness (12-pin), P6 Main-NCU harness (6-pin), P6 (on the European and Asian versions only)

• Main-sensor harness (11-pin), P4

P10

P18

P5 P8

P16

P13

P11

Main PCB

(Rear)

Main-sensor harness

Main-panel harness

Main–low-voltage harness

Main motor harness

Scanner motor harness

Solenoid harness

Speaker harness

Hook switch harness

Main-NCU harness

Interface plate

Relay PCB

Shield bracket

Main cover (placed upside down)

Interface plate

Centronics parallel interface connector

Relay PCB

Fan 2 harness

IV – 20

Nickel-hydrogen battery

Interface plate

5 mm

Connector (P14)

Bring the battery edge into contact with the PCB.

Main PCB

(MFC6550MC/7550MC/7650MC/9500)

■ Reassembling Notes

• When reinstalling the main PCB, make sure that the harnesses are routed on the main cover as illustrated in Section 1.23.

• For the MFC6550MC/7550MC/7650MC/9500 which has a nickel-hydrogen battery on the main PCB, be sure to remove the battery from the PCB when transporting the PCB. Failure to do so may result in a short circuit, overcurrent flow, and fire.

When installing the nickel-hydrogen battery on the main PCB, bring its edge into contact with the surface of the PCB and attach it to the interface plate 5 mm inwards from the plate edge as shown below.

• For the MFC4550plus/7650MC, if you replace the main PCB with a new one, be sure to install the update data onto the flash ROM of the new main PCB (refer to Chapter II).

IV – 21

PC1

PC2

SW1

1.16 Relay PCB

(1) Remove the screw. (2) Slightly lift up the relay PCB and disconnect the following four things:

• Toner sensor harness (4-pin), P4

• Laser diode harness (5-pin), P3

• Polygon motor flat cable (5-pin), P2

• Relay–high-voltage flat cable (12-pin), P1

Registration sensor Polygon motor flat cable

Sheet feeder cover sensor

Cover sensor

Relay–high-voltage flat cable

This corner should come directly under the shield bracket.

Relay PCB

Toner sensor harness

Laser diode harness

Shield bracket

■ Reassembling Notes

• When reinstalling the relay PCB, be sure that corner "X" shown above comes directly under the shield bracket.

"X"

Polygon motor flat cable

Laser diode harness

Relay–high-voltage flat cable

IV – 22

1.17 Shield Bracket and NCU PCB ASSY

(1) Remove the three screws and take out the shield bracket.

Shield bracket

Main cover (placed upside down)

NCU PCB ASSY

(Rear)

(2) Remove the screw and take out the NCU PCB ASSY.

For the MFC9500, disconnect the microphone harness from the NCU PCB.

NCU PCB ASSY

(Rear)

Main cover (placed upside down)

Microphone harness (MFC9500 only)

IV – 23

1.18 Gear Drive Unit

(1) Take out the heater harness (blue and brown wires) from the clamps provided on the

gear drive unit.

(2) Take out the main motor harness, solenoid harness, and drum grounding harness from

the clamp provided on the main cover.

Relay PCB

Main cover (placed upside down)

(Rear)

Clamp provided on the main cover

Main motor harness

Drum grounding harness

Heater harness (blue and brown wires)

Solenoid harness

Gear drive unit

Main motor

(3) Remove the three screws and take out the gear drive unit.

(Rear)

Gear drive unit

Solenoid harness (from the main PCB)

Drum grounding harness (from the high-voltage power supply PCB)

Main cover (placed upside down)

Main motor harness (from the main PCB)

IV – 24

(4) To replace the paper feed solenoid, solenoid lever or clutch release lever, remove the

three screws and take off the motor bracket.

(5) To remove the main motor from the bracket, remove two screws.

■ Reassembling Notes

• If the paper feed solenoid, solenoid lever, or clutch release lever has been removed, assemble the removed parts as shown above.

Pull-in roller drive gear

Intermediate gear Clutch gear

Solenoid spring

Paper feed solenoid

Planetary gear system

Gear 20/94

Clutch release lever

Solenoid lever

Gear drive unit

Solenoid lever

Clutch release lever

Solenoid spring

Clutch spring

Main motor

Motor bracket

IV – 25

1.19 Duct Cover, Fan 2, and Speaker

(1) Unhook the three latches of the duct cover and lift it up. Take out the fan 2. (2) Unhook the latch and lift up the speaker.

Fan 2

(Front)

Latch

Contrast adjuster

Duct cover

Latches

Speaker

Latch

Main cover (placed upside down)

■ Reassembling Notes

• After reinstalling the duct cover, make sure that the harnesses are routed as illustrated in Section 1.23.

• When setting the fan 2, be careful with the installation direction. The name plate should face outwards.

IV – 26

1.20 Sheet Feeder Cover Sensor Actuator, Registration Sensor Actuator, and Cover Sensor Actuator

(1) Pull up the sheet feeder cover sensor actuator. (2) Pull up the registration sensor actuator. (3) Unhook the spring and take out the cover sensor actuator.

Cover sensor actuator

(Rear)

Main cover (placed upside down)

Sheet feeder cover sensor actuator

Registration sensor actuator

IV – 27

1.21 Microphone (MFC9500 only)

(1) Disconnect the microphone harness from the NCU PCB and remove the NCU PCB

ASSY. (Refer to Section 1.17.) (2) Turn the equipment rightside up. (3) Lift up the microphone from the main cover.

Main cover (placed rightside up)

Boss

Microphone

(Front)

■ Reassembling Notes

• Put the microphone back into place with either boss facing up.

IV – 28

1.22 Cleaning of High-voltage Contacts and Grounding Contacts

If any toner particles, paper dust or dirt are on the contacts, clean them out. This will ensure that power flows correctly to enable printing.

7 For developer

roller

6 For corona wire

5 For grid

4 For cleaner

roller

3 For transfer

roller

Grounding Contacts High-voltage Contacts

Drum grounding board

Gear drive unit

High-voltage power supply PCB

Drum unit

IV – 29

1.23 Harness Routing

Relay PCB

Fan 2 harness

Main-sensor harness

Relay–highvoltage flat cable

Main-panel harness

Fan 1 harness

Drum grounding harness

Speaker harness

Solenoid harness

Hook switch harness

Heater harness

Main motor harness

Main–lowvoltage harness

Low-voltage power supply PCB

NCU PCB

Main PCB

Main-NCU harness

High-voltage power supply PCB

Eraser harness

Laser diode harness

Toner sensor harness

Polygon motor flat cable

(Front)

Scanner motor harness

Microphone harness (MFC9500 only)

IV – 30

2. LUBRICATION

Apply Molykote EM-30L to the lubrication points as illustrated below. For points A, apply a bean-sized pinch of grease (12 mm3).

For points B, apply a rice-sized pinch of grease (6 mm3).

[ 1 ] Inner cover

Control panel lock (leaf spring)

(Front)

Inner cover

Document ejection roller ASSY

Document take-in roller ASSY

Separation roller ASSY

Scanner frame

(Front)

[ 2 ] Scanner frame ASSY

Document feed roller ASSY

CHAPTER V.

MAINTENANCE MODE

CONTENTS

1. ENTRY INTO THE MAINTENANCE MODE.................................................. V-1

2. LIST OF MAINTENANCE-MODE FUNCTIONS............................................ V-2

3. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS......... V-4

3.1 E2PROM Parameter Initialization.......................................................... V-4

3.2 Scanning Compensation Data Initialization........................................... V-5

3.3 Printout of Scanning Compensation Data............................................. V-6

3.4 ADF Performance Test.......................................................................... V-8

3.5 Test Pattern 1.........................................................................................V-9

3.6 Firmware Switch Setting and Printout................................................... V-10

3.7 Operational Check of Control Panel PCB............................................. V-47

3.8 Sensor Operational Check.................................................................... V-48

3.9 CCD Scanner Area Setting................................................................... V-49

3.10Equipment Error Code Indication.......................................................... V-49

3.11Output of Transmission Log to the Telephone Line............................... V-50

V – 1

1. ENTRY INTO THE MAINTENANCE MODE

To make the facsimile equipment enter the maintenance mode, press the Function ,

* , 2 , 8 , 6 , and 4 keys in this order.

Within 2 seconds The equipment beeps for approx. 3 seconds and displays "MAINTENANCE" on the LCD, in-

dicating that it is placed in the initial maintenance mode, a mode in which the equipment is ready to accept entry from the keys.

To select one of the maintenance-mode functions listed in Section 2, enter the corresponding 2-digit function code with the numerical keys on the control panel. (The details of each maintenance-mode function are described in Section 3.)

NOTES: • Pressing the 9 key twice in the initial maintenance mode restores the equip-

ment to the standby state.

• Pressing the Stop button after entering only one digit restores the equipment to the initial maintenance mode.

• If an invalid function code is entered, the equipment resumes the initial maintenance mode.

V – 2

ADF* Performance Test Test Pattern 1 Firmware Switch Setting Printout of Firmware Switch Data

2. LIST OF MAINTENANCE-MODE FUNCTIONS

Maintenance-mode Functions

Function

E2PROM Parameter Initialization Scanning Compensation Data Initialization

Reference

Subsection

(Page)

Function

Code

01 02 03 04 05 06 07 08 09 10

11 12 13

3.1 (V-4)

3.2 (V-5)

Printout of Scanning Compensation Data 3.3 (V-6)

3.4 (V-8)

3.5 (V-9)

3.6 (V-10)

3.6 (V-46)

3.7 (V-47)

Operational Check of Control Panel PCB (Check of Keys and Buttons)

Sensor Operational Check CCD Scanner Area Setting Equipment Error Code Indication Output of Transmission Log to the Line E2PROM Parameter Initialization (except the tele-

phone number storage area)

3.8 (V-48)

3.9 (V-49)

3.10 (V-49)

3.1 1 (V-50)

3.1 (V-4)

32 55 82 87 91

* ADF: Automatic document feeder

V – 3

- - - - - - - - - - - - - - - - - - - - - - - - - - IMPORTANT - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Basically, the maintenance-mode functions listed on the previous page should be accessed by service personnel only. However, you may allow end users to access some of these under the guidance of service personnel (e.g., by telephone).

The user-accessible functions (codes 10, 11, 82, and 91) are shaded in the above table. Function code 10 accesses the firmware switches WSW01 to WSW34, each of which has eight selectors. You should not allow end users to access all of those selectors, but you may allow them to access user-accessible selectors which are shaded in the firmware switch tables in Subsection 3.6.

The service personnel should instruct end users to follow the procedure given below. (1) Press the Function key and the Mode key in this order.

The LCD clears the current display. NOTE: The Mode key is inoperable during standby for redialing, timer, paging, and

forwarding. (2) Press the 0 key. (3) Enter the desired function code (10, 11, 82, or 91) with the numerical keys.

For function code 10, access the desired firmware switch according to the operating procedure described in Subsection 3.6.

(4) To make the equipment return to the standby state, press the Stop key.

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -

Line

On/Off

FF/Cont

Priority

Test/

Copy

Photo

Reset

01 02 03 13 14 15

07 08 09 19 20 21

10 11 12 22 23 24

04 05 06 16 17 18

Reduce

Enlarge/

Sort

Function Clear Tel-indexSet Help

Super

Q.Scan

Resolution Mode Coverpage

Stop

Start

Shift

Hook

Hold

Speed Dial

1 4 7

ABC DEF

GHI JKL MNO

PQRS TUV WXYZ

status status

Redial / Pause

Record Erase

Speaker HL

Play

MFC 7550MC

FAX PRINTER COPIER SCANNER PC FAX MESSAGE CENTER

SIX

ONE

Fine Photo S.Fine

Fax

F/T

Voice

Fax

status

0 key

Function key Mode key

Stop key

V – 4

3 DETAILED DESCRIPTION OF

MAINTENANCE-MODE FUNCTIONS

3.1 E2PROM Parameter Initialization

■ Function

The equipment initializes the parameters, user switches, and firmware switches registered in the E2PROM, to the initial values. Entering the function code 01 initializes all of the E2PROM areas, but entering 91 does not initialize some areas, as listed below.

Function code

Data item

Maintenance-mode functions

User switches Firmware switches Remote activation code Activity report Distinctive ringing patterns

registered (only for the U.S.A. versions)

Station ID data Cover page comments Outside line number

Telephone function registration

One-touch dialing Speed dialing Group dialing

■ Operating Procedure

(1) Press the 0 and 1 keys (or the 9 and 1 keys according to your need) in this

order in the initial maintenance mode. The "PARAMETER INIT" will appear on the LCD.

(2) Upon completion of parameter initialization, the equipment returns to the initial mainte-

nance mode.

All of these will be initialized.

These will not be initialized.

These will be initialized.

V – 5

3.2 Scanning Compensation Data Initialization

■ Function

The equipment scans the white pressure bar and writes the scanned compensation data onto the E2PROM, so said data can be used for compensation of individual CCD properties in the scanning operation.

■ Operating Procedure

(1) Press the 0 and 2 keys in this order in the initial maintenance mode.

The “WHITE LEVEL INIT” will appear on the LCD.

(2) Upon completion of compensation data initialization, the equipment returns to the initial

maintenance mode.

NOTE: If any error occurs in the E2PROM white level data, the “SCANNER ERROR” or

“CLEAN UP SCANNER” will appear on the LCD.

V – 6

3.3 Printout of Scanning Compensation Data

■ Function

The equipment prints out the white and black level data for scanning compensation.

■ Operating Procedure

Do not start this function merely after powering on the equipment but start it after carrying out a sequence of scanning operation. Unless the equipment has carried out any scanning operation, this function cannot print out correct scanning compensation data. This is because the equipment initializes white and black level data and takes in the scanning compensation reference data at the start of scanning operation.

(1) Press the 0 and 5 keys in this order in the initial maintenance mode.

The "WHITE LEVEL 1" will appear on the LCD.

(2) The equipment prints out the scanning compensation data list containing the following:

FAX3550/3650/8000P/8200P/MFC4450/4550/4550plus (200 dpi)

a) 2-value quantization white level data (208 bytes) b) 2-value quantization black level data (1 byte) c) Photo-mode white level data (208 bytes) d) Photo-mode black level data (1 byte) e) LED light intensity value, 2-value quantization LED light intensity value, and photo-

mode LED light intensity value (3 bytes)

f) 2-value quantization A/D-high and photo-mode A/D-high values (2 bytes)

MFC6550MC/7550MC/7650MC/9000/9500 (300 dpi)

a) 2-value quantization white level data (1664 bytes) b) 2-value quantization black level data (1 byte) c) Photo-mode white level data (1664 bytes) d) Photo-mode black level data (1 byte) e) LED light intensity value, 2-value quantization LED light intensity value, and photo-

mode LED light intensity value (3 bytes)

f) 2-value quantization A/D-high, photo-mode A/D-high and A/D-low values (3 bytes)

(3) Upon completion of recording of the compensation data list, the equipment returns to

the initial maintenance mode.

NOTE: If any data is abnormal, its code will be printed in inline style, as shown on the next

page.

V – 7

Scanning Compensation Data List (200 dpi)

V – 8

3.4 ADF Performance Test

■ Function

The equipment counts the documents fed by the automatic document feeder (ADF) and displays the count on the LCD for checking the ADF performance.

■ Operating Procedure

(1) Set documents. (Allowable up to the ADF capacity.)

The "DOC. READY" will appear on the LCD.

(2) Press the 0 and 8 keys in this order.

The equipment

i) copies the 1st document and displays "P.01" on the LCD, ii) feeds in and out the 2nd through 4th documents while counting without copying

them as the LCD shows the corresponding count, iii) copies the 5th document and displays "P.05" on the LCD, iv) feeds in and out the 6th through 9th documents while counting without copying

them as the LCD shows the corresponding count, and v) copies the 10th document and displays "P.10" on the LCD.

(3) Upon completion of feeding in and out all of the documents, the final count appears on

the LCD.

(4) Press the Stop key to return the equipment to the initial maintenance mode.

V – 9

3.5 Test Pattern 1

■ Function

This function, much like the copying function, prints out test pattern 1 to allow the service personnel to check for record data missing or print quality.

■ Operating Procedure

Press the 0 and 9 keys in this order in the initial maintenance mode. The figure below shows test pattern 1.

Test Pattern 1

V – 10

WSW No. Function Reference Page

WSW01 Dial pulse setting V-12 WSW02 Tone signal setting V-13 WSW03 PABX mode setting V-14 WSW04 TRANSFER facility setting V-15 WSW05 1st dial tone and busy tone detection V-16 WSW06 PAUSE key setting and 2nd dial tone detection V-18 WSW07 Dial tone setting 1 V-20 WSW08 Dial tone setting 2 V-21 WSW09 Protocol definition 1 V-22 WSW10 Protocol definition 2 V-23

WSW11 Busy tone setting V-24

WSW12 Signal detection condition setting V-25 WSW13 Modem setting V-26 WSW14 AUTO ANS facility setting V-27 WSW15 REDIAL facility setting V-28

WSW16 Function setting 1 V-29

WSW17 Function setting 2 V-30

WSW18 Function setting 3 V-31

WSW19 Transmission speed setting V-32 WSW20 Overseas communications mode setting V-33 WSW21 TAD setting 1 V-34 WSW22 Communications setting 1 V-34 WSW23 Communications setting 2 V-35 WSW24 TAD setting 2 V-36 WSW25 TAD setting 3 V-37 WSW26 Function setting 4 V-38 WSW27 Function setting 5 V-39 WSW28 Function setting 6 V-40 WSW29 Function setting 7 V-41 WSW30 Function setting 8 V-42 WSW31 Function setting 9 V-43 WSW32 Function setting 10 V-43 WSW33 Function setting 11 V-44 WSW34 Function setting 12 V-45

3.6 Firmware Switch Setting and Printout

[ A ]Firmware switch setting

■ Function

The facsimile equipment incorporates the following firmware switch functions (WSW01 through WSW34) which may be activated with the procedures using the control panel keys and buttons.

The firmware switches have been set at the factory in conformity to the communications standards and codes of each country. Do not disturb them unless necessary. Some firmware switches may not be applicable in some versions. The firmware switch data list indicates "Not used." for those inapplicable switches.

Firmware Switches (WSW01 through WSW34)

V – 11

■ Operating Procedure

(1) Press the 1 and 0 keys in this order in the initial maintenance mode.

The equipment displays the "WSW00" on the LCD and becomes ready to accept a firmware switch number.

(2) Enter the desired number from the firmware switch numbers (01 through 34).

The following appears on the LCD:

WSWxx 0 0 0 0 0 0 0 0 (3) Use the and keys to move the cursor to the selector position to be modified. (4) Enter the desired number using the 0 or 1 key.

(5) Press the Set key. This operation saves the newly entered selector values onto the

E2PROM and readies the equipment for accepting a firmware switch number.

(6) Repeat steps (2) through (5) until the modification for the desired firmware switches is

completed. (7) Press the Set or Stop key to return the equipment to the initial maintenance mode. NOTES: • To cancel this operation and return the equipment to the initial maintenance

mode during the above procedure, press the Stop key.

• If there is a pause of more than one minute after a single-digit number is entered for double-digit firmware switch numbers, the equipment will automatically return to the initial maintenance mode.

■ Note

The user-accessible selectors of the firmware switches are shaded in the tables given on the following pages.

V – 12

■ Detailed Description for the Firmware Switches

WSW01 (Dial pulse setting)

Function

Selector

No.

Setting and Specifications

1 2

3 4

5 6

Dial pulse generation mode

Inter-digit pause

Break time length in pulse dialing

No. 3 4

0 0 : 60 ms 0 1 : 67 ms 1 0 : 40 ms (for 16 PPS) 1 1 : 64 ms

(at 106-ms intervals)

No. 5 6

0 0 : 800 ms 0 1 : 850 ms 1 0 : 950 ms 1 1 : 600 ms

Default dialing mode, pulse (DP) or tone (PB) dialing

Switching between pulse (DP) and tone (PB) dialing, by the function switch

0: Yes 1: No

No. 1 2

00: N 0 1 : N+1 1 0 : 10-N 11: N

0: PB 1: DP

● Selectors 1 and 2: Dial pulse generation mode

These selectors set the number of pulses to be generated in pulse dialing.

N: Dialing "N" generates "N" pulses. (Dialing "0" generates 10 pulses.) N + 1: Dialing "N" generates "N + 1" pulses. 10 - N: Dialing "N" generates "10 - N" pulses.

● Selectors 3 and 4: Break time length in pulse dialing

These selectors set the break time length in pulse dialing. (Example: If "1", "2", and "3" are dialled when N is set by selectors 1 and 2.)

"1" "2" "3"

Break time length set by selectors 3 and 4

● Selectors 5 and 6: Inter-digit pause

These selectors set the inter-digit pause in pulse dialing. (Example: If "1", "2", and "3" are dialled when N is set by selectors 1 and 2.)

"1"

"2"

"3"

Inter-digit pause set by selectors 5 and 6

V – 13

● Selector 7: Switching between pulse (DP) and tone (PB) dialing, by the function switch

This selector determines whether or not the dialing mode may be switched between the pulse (DP) and tone (PB) dialing by using the function switch.

● Selector 8: Default dialing mode, pulse (DP) or tone (PB) dialing

This selector sets the default dialing mode (pulse dialing or tone dialing) which may be changed by the function switch. If the user switches it with the function switch when selector 7 is set to "0," the setting specified by this selector will be also switched automatically.

WSW02 (Tone signal setting)

Function

Setting and Specifications

Selector

No.

1 2

3 4

Tone signal transmission time length

Min. pause in tone dialing

No. 1 2

0 0 : 70 ms 0 1 : 80 ms 1 0 : 90 ms 1 1 : 100 ms

No. 3 4

0 0 : 70 ms 0 1 : 80 ms 1 0 : 90 ms 1 1 : 140 ms

0: 0 dB 1: 8 dB 0: 0 dB 1: 4 dB 0: 0 dB 1: 2 dB 0: 0 dB 1: 1 dB

● Selectors 1 through 4: Tone signal transmission time length and Min. pause in tone dialing

These selectors set the tone signal transmission time length and minimum pause in tone dialing.

(Example: If "1," "2," "3," "4," and "5" are dialled.)

"1"

"2"

"3"

"4"

"5"

Min. pause set by selectors 3 and 4

Tone signal transmission time length set by selectors 1 and 2

● Selectors 5 through 8: Attenuator for pseudo ring backtone to the line

These selectors are used to adjust the sound level of beep generated as a ring backtone in the F/T mode or as a signal during remote control operation or at the start of ICM recording.

Setting two or more selectors to "1" produces addition of attenuation assigned to each selector.

This setting will be limited if selector 8 of WSW23 is set to "0."

Attenuator for pseudo ring backtone to the line (selectable in the range of 0-15 dB)

V – 14

WSW03 (PABX* mode setting)

Function

Selector

No.

No. 2 3 4

0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms 0 1 1 : 800 ms 1 0 0 : 900 ms 1 0 1 : 1.5 sec. 1 1 0 : 2.0 sec. 1 1 1 : 2.5 sec.

Setting and Specifications

Min. detection time length of PABX dial tone, required for starting dialing

Not used.

6 7

Dial tone detection in PABX

No. 6 7

0 0 : No detection

(3.5 sec. WAIT)

0 1 : No detection

(5 sec. WAIT)

1 0 : No detection

(7 sec. WAIT)

1 1 : Detection

(Frequency only)

"R" key function

0: 1st dial tone 1: No 1st dial

detection add tone detection

* PABX: Private automatic branch exchange

NOTE: The WSW03 is not applicable in those countries where no PABX is supported, e.g.,

U.S.A.

● Selectors 2 through 4: Min. detection time length of PABX dial tone, required for starting

dialing

Upon detection of the PABX dial tone for the time length set by these selectors, the equipment starts dialing.

These selectors are effective only when both selectors 6 and 7 are set to "1" (Detection).

● Selectors 6 and 7: Dial tone detection in PABX

These selectors activate or deactivate the dial tone detection function which detects a dial tone when a line is connected to the PABX.

Setting both of these selectors to "1" activates the dial tone detection function so that the equipment starts dialing upon detection of a dial tone when a line is connected.

Other setting combinations deactivate the dial tone detection function so that the equipment starts dialing after the specified WAIT (3.5, 5.0, or 7.0 sec.) without detection of a dial tone when a line is connected.

V – 15

● Selector 8: "R" key function

This selector determines whether or not the 1st dial tone detection function (specified by selectors 1 through 3 of WSW05) is added to the R key.

If this selector is set to "0," pressing the R key automatically activates the 1st dial tone detection function when the PABX and the automatic calling are selected by using the function switch. If you press the R key and a dial number in succession, the equipment will automatically carry out the 1st dial tone detection function following the original transfer function as shown below.

Dial number

Original transfer function of R key

1st dial tone detection function

WSW04 (TRANSFER facility setting)

Function

Selector

No.

Setting and Specifications 1 Earth function in transfer facility 0: Provided 1: Not provided 2

No. 2 3

0 0 : 350 + 440 Hz (A) 0 1 : 440 + 480 Hz (B) 1 x : 480 + 620 Hz (C)

Dual tone detection frequency in ICM recording

Not used.4

5 6

Break time length for flash function

7 8

No. 7 8

0 0 : 80 ms 0 1 : 110 ms 1 0 : 250 ms 1 1 : 500 ms

No. 5 6

0 0 : 200 ms 0 1 : 300 ms 1 0 : 500 ms 1 1 : 700 ms

Earth time length for earth function

NOTE: Selectors 1 and 5 through 8 are not applicable in those countries where no transfer facility is

supported. Selectors 2 and 3 are applicable to those models equipped with a built-in TAD or in the U.S.A.

● Selector 1: Earth function in transfer facility

This selector determines whether or not the earth function is added to the transfer setting menu to be accessed by the function switch.

● Selectors 5 and 6: Earth time length for earth function

These selectors set the short-circuiting time length of the telephone line (La or Lb) to ground. This setting is effective only when the earth function is selected for the R key by using the

function switch.

● Selectors 7 and 8: Break time length for flash function

These selectors set the break time length. This setting is effective only when the flash function is selected for the R key by using the

function switch.

V – 16

WSW05 (1st dial tone and busy tone detection)

Function

Selector

No.

Setting and Specifications

Max. pause time allowable for remote ID code detection

Busy tone detection in automatic receiving mode

1st dial tone detection

4 0: 2 seconds 1: 1 second

Busy tone detection in automatic sending mode

No. 1 2 3

0 0 0 : 3.5 sec. WAIT 0 0 1 : 7.0 sec. WAIT 0 1 0 : 10.5 sec. WAIT 0 1 1 : 14.0 sec. WAIT 1 0 0 : 17.5 sec. WAIT 1 0 1 : 21.0 sec. WAIT 1 1 0 : 24.5 sec. WAIT 111:

Detection (Without WAIT)

No. 5 6

0 0 : No detection 0 1 : Detection only

after dialing 1 0 : No detection 1 1 : Detection before

and after dialing

0: Yes 1: No7

5 6

DTMF detection time

NOTE: Selectors 5 through 7 are not applicable in those countries where no busy tone detec-

tion is supported, e.g., U.S.A.

● Selectors 1 through 3: 1st dial tone detection

These selectors activate or deactivate the 1st dial tone detection function which detects the 1st dial tone issued from the PSTN when a line is connected to the PSTN.

Setting all of these selectors to "1" activates the dial tone detection function so that the equipment starts dialing upon detection of a dial tone when a line is connected. (However, in those countries which support no dial tone detection function, e.g. in the U.S.A., setting these selectors to "1" makes the equipment start dialing after a WAIT of 3.5 seconds.) For the detecting conditions of the 1st dial tone, refer to WSW07 and WSW08.

Other setting combinations deactivate the dial tone detection function so that the equipment starts dialing after the specified WAIT (3.5, 7.0, 10.5, 14.0, 17.5, 21.0, or 24.5 seconds) without detection of a dial tone when a line is connected to the PSTN.

● Selector 4: Max. pause time allowable for remote ID code detection

This selector sets the maximum pause time allowable for detecting the second digit of a remote ID code after detection of the first digit in remote reception.

If selector 4 is set to "0" (2 seconds), for instance, only a remote ID code whose second digit is detected within 2 seconds after detection of the first digit will become effective so as to activate the remote function.

0: 40 ms min. 1: 100 ms min.

V – 17

● Selectors 5 and 6: Busy tone detection in automatic sending mode

These selectors determine whether or not the equipment automatically disconnects a line upon detection of a busy tone in automatic sending mode.

Setting selector 6 to "0" ignores a busy tone so that the equipment does not disconnect the line.

Setting selectors 5 and 6 to "0" and "1," respectively, makes the equipment detect a busy tone only after dialing and disconnect the line.

Setting both of selectors 5 and 6 to "1" makes the equipment detect a busy tone before and after dialing and then disconnect the line.

● Selector 7: Busy tone detection in automatic receiving mode

This selector determines whether or not the equipment automatically disconnects a line upon detection of a busy tone in automatic receiving mode

V – 18

WSW06 (PAUSE key setting and 2nd dial tone detection)

Function

Selector

No.

Setting and Specifications

2nd dial tone interrupt detecting time

0: Once 1: Twice

0: 30 ms 1: 50 ms

Detection of international tone

No. 1 2 3

0 0 0 : No pause 0 0 1 : 3.5 sec. WAIT 0 1 0 : 7 sec. WAIT 0 1 1 : 10.5 sec. WAIT 1 0 0 : 14 sec. WAIT 1 0 1 : 17.5 sec. WAIT 1 1 0 : 2nd dial tone detection

only in pulse dialing (DP) system

1 1 1 : 2nd dial tone detection

both in DP and pushbutton (PB) dialing systems

No. 4 5 6

0 0 0 : 50 ms 0 0 1 : 210 ms 0 1 0 : 500 ms 0 1 1 : 800 ms 1 0 0 : 900 ms 1 0 1 : 1.5 sec. 1 1 0 : 2.0 sec. 1 1 1 : 2.5 sec.

NOTE: Selectors 4 through 8 are not applicable in those countries where no dial tone detec-

tion is supported, e.g., U.S.A.

● Selectors 1 through 3: PAUSE key setting and 2nd dial tone detection

Selectors 123

110 111

Each time the PAUSE key is pressed, the equipment detects a 2nd dial tone.

If no 2nd dial tone is inputted within the specified time, the equipment disconnects the line in automatic dialing, or it starts transmitting the dial signal if given after depression of the PAUSE key in hook-up dialing.

(In those countries where no dial tone detection function is supported, setting these selectors to "1, 1, 0" or "1, 1, 1" inserts a WAIT of 3.5 seconds.)

001 010 011 100 101

Pressing the PAUSE key inserts WAIT in pulse dialing, as defined in the above table.

If the PAUSE key is pressed repeatedly, the equipment beeps a refusal sound and refuses the entry.

In hook-up dialing, however, the equipment allows repeated pressing with an acceptance sound, but inserts WAIT only for the first pressing.

0 0 0 No WAIT is inserted even if the PAUSE key is pressed.

PAUSE key setting and 2nd dial tone detection

No. of 2nd dial tone detection times

Brother MFC4450, MFC7550MC, MFC7650MC, FAX8000P, FAX8200P Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual