Brother FAX 4750 User manual

FACSIMILE EQUIPMENT
SERVICE MANUAL
MODEL: FAX4750
MFC8300/8600

© Copyright Brother 1999
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission in writing
from the publisher.
Specifications are subject to change without notice.
All products and company names mentioned in this manual are trademarks or registered trademarks of their
respective holders.

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 lubrication--so that service personnel
will be able to understand equipment function, to rapidly repair the equipment and order any
necessary spare parts.
To 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.DISASSEMBLY/REASSEMBLY AND LUBRICATION
CHAPTER V. MAINTENANCE MODE
CHAPTER VI. ERROR INDICATION AND TROUBLESHOOTING
Appendix 1. EEPROM Customizing Codes
Appendix 2. Circuit Diagrams
This manual describes the models and their 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 Chinese products
MANUFACTURED: JULY 1999 C
BROTHER CORP. (ASIA) LTD.
BROTHER BUJI NAN LING FACTORY
Gold Garden Industry, Nan Ling Village, Buji,
Rong Gang, Shenzhen, China.
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.
w/o 2nd cassette w/ 2nd cassette
Weight: Machine proper 10.5 kg 14.0 kg
Machine (incl. drum unit & toner cartridge) 12.0 kg 15.5 kg
In package 16.5 kg 22.0 kg
1.2 Components
The equipment consists of the following major components:
*1 Provided on those models equipped
with a handset.
*2 Provided on those models without
handset.

I- 2
2. SPECIFICATIONS
(1/4)
Model FAX4750 MFC8300
GENERAL
Print Engine Laser (ZL) Laser (ZL)
Modem Speed (bps) 14,400 (Fax) 14,400 (Fax)
Transmission Speed (sec.) 6 6
ITU-T Group G3 G3
Coding Method MH/MR/MMR MH/MR/MMR
Input/Output Width 5.8" to 8.5" x 2.75" to 8.5" 5.8" to 8.5" x 2.75" to 8.5"
ADF (pages) 30 (50*1)30
LCD Size 16 chars x 2 lines 16 chars x 2 lines
On-Screen Programming Yes Yes
Backup Clock Yes (1 hour) Yes (1 hour)
Memory Capacity (MB) 4 2
Backup Memory No No
Optional Memory Yes (8 & 16 MB) Yes (8 & 16 MB)
Color Gray 1495 Gray 1495
Standby Mode Yes Yes
PC-Fax Protocol Compliance Class 2 Class 2
Simultaneous Operation Yes Yes
Data Modem No No
Energy Star Compliance (for U.S.A.) Yes Yes
LCD Backlight No No
Operating Environment Temperature 5 to 35°C 5 to 35°C
Humidity 60 ±25% 60 ±25%
Power Source 120 VAC, 50/60Hz 120 VAC, 50/60Hz
Power Consumption (Sleep/Peak) Less than 9W/850W Less than 9W/850W
TELEPHONE
Automatic Redial Yes Yes
Handset Yes Yes
One-Touch Dial 32 (16 x 2) 32 (16 x 2)
Speed Dial 100 100
Telephone Index Yes Yes
Speaker Phone No No
Chain Dialing Yes Yes
Caller ID Yes Yes
Call Waiting Caller ID Yes Yes
Distinctive Ringing Yes Yes
Hold/Mute Key Yes Yes
Power Failure Dialing No No
Speaker Volume Yes (3 levels + OFF) Yes (3 levels + OFF)
Ring Volume Yes (3 levels + OFF) Yes (3 levels + OFF)
Handset Volume Yes (2 levels + Hearing amplify level) Yes (2 levels + Hearing amplify level)
PBX Feature No No
Transfer Method Flash Flash
Digits of One-Touch & Speed Dial 20 digits 20 digits
Registrable Number of Characters 15 chars 15 chars
*1Xerox 4200 (20 lb/LTR) in normal business environments

I- 3
(1/4)
Model MFC8600
GENERAL
Print Engine Laser (ZL)
Modem Speed (bps) 14,400 (Fax)
Transmission Speed (sec.) 6
ITU-T Group G3
Coding Method MH/MR/MMR
Input/Output Width 5.8" to 8.5" x 2.75"to 8.5"
ADF (pages) 30
LCD Size 16 chars x 2 lines
On-Screen Programming Yes
Backup Clock Yes (1 hour)
Memory Capacity (MB) 4
Backup Memory No
Optional Memory Yes (8 & 16 MB)
Color Gray 1495
Standby Mode Yes
PC-Fax Protocol Compliance Class 2
Simultaneous Operation Yes
Data Modem No
Energy Star Compliance (for U.S.A.) Yes
LCD Backlight No
Operating Environment Temperature 5 to 35 °C
Humidity 60 ±25%
Power Source 120 VAC, 50/60Hz
Power Consumption (Sleep/Peak) Less than 9W/850W
TELEPHONE
Automatic Redial Yes
Handset Yes
One-Touch Dial 32 (16 x 2)
Speed Dial 100
Telephone Index Yes
Speaker Phone No
Chain Dialing Yes
Caller ID Yes
Call Waiting Caller ID Yes
Distinctive Ringing Yes
Hold/Mute Key Yes
Power Failure Dialing No
Speaker Volume Yes (3 levels + OFF)
Ring Volume Yes (3 levels + OFF)
Handset Volume Yes (2 levels + Hearing amplify level)
PBX Feature No
Transfer Method Flash
Digits of One-Touch & Speed Dial 20 digits
Registrable Number Of Characters 15 chars

I- 4
(2/4)
Model FAX4750 MFC8300
FAX
Internet FAX N/A N/A
Easy Receive/Fax Detect Yes Yes
Fax/Tel Switch Yes Yes
Super Fine Yes (TX & RX) Yes (TX & RX)
300 dpi Transmission No No
Gray Scale 64 64
Contrast Yes (Auto/S.Light/S.Dark) Yes (Auto/S.Light/S.Dark)
Smoothing Yes Yes
Call Reservation Over Auto TX Yes Yes
Password Check No No
Enhanced Remote Activation Yes Yes
Multi Resolution Transmission Yes Yes
Multi Transmission No No
Next-Fax Reservation Yes (Dual access) Yes (Dual access)
Delayed Timer Yes (Up to 50 timers or 50 jobs) Yes (Up to 50 timers or 50 jobs)
Polling Yes (Std/Seq) Yes (Std/Seq)
Quick Scan (Memory Transmission) Approx. 2 sec/page (A4, std. resolution) Approx. 2 sec/page (A4, std. resolution)
Broadcasting Yes (182 locations) Yes (182 locations)
Batch Transmission Yes Yes
Auto Reduction Yes Yes
Out-of-Paper Reception (Brother #1 Chart) Up to 270 pages Up to 90 pages
(ITU-T Chart) Up to 210 pages Up to 70 pages
Dual Access Yes Yes
ECM (Error Correction Mode) Yes Yes
ITU SUB Addressing No No
Group Dial Yes (6) Yes (6)
Re-send After Receive Error Signal No No
Confidential No No
Station ID 1 (20 digits/20 characters) 1 (20 digits/20 characters)
Off-Hook Alarm No No
Remote Maintenance Yes Yes
Call Reservation Over Manual TX Yes Yes
RX Mode Indication LED LED
Resolution Indication LED LED
LIST REPORT
Activity Report/Journal Report Yes (up to 50) Yes (up to 50)
Transmission Verification Report Yes Yes
Coverpage Yes (Super) Yes (Super)
Help List Yes Yes
Callback Message Yes Yes
Caller ID List Yes Yes
INTERFACE
External TAD Interface Yes Yes
Missing Link/PC Interface No No
Host Interface Yes (Parallel) Yes (Auto switching : Parallel/USB*2)
LAN Interface No No
*2USB for Windows98 only

I- 5
(2/4)
Model MFC8600
FAX
Internet FAX N/A
Easy Receive/Fax Detect Yes
Fax/Tel Switch Yes
Super Fine Yes (TX & RX)
300 dpi Transmission No
Gray Scale 64
Contrast Yes (Auto/S.Light/S.Dark)
Smoothing Yes
Call Reservation Over Auto TX Yes
Password Check No
Enhanced Remote Activation Yes
Multi Resolution Transmission Yes
Multi Transmission No
Next-Fax Reservation Yes (Dual access)
Delayed Timer Yes (Up to 50 timers or 50 jobs)
Polling Yes (Std/Seq)
Quick Scan (Memory Transmission) Approx. 2 sec/page (A4, std. resolution)
Broadcasting Yes (182 locations)
Batch Transmission Yes
Auto Reduction Yes
Out-of-Paper Reception (Brother #1 Chart) Up to 270 pages
(ITU-T Chart) Up to 210 pages
Dual Access Yes
ECM (Error Correction Mode) Yes
ITU SUB Addressing No
Group Dial Yes (6)
Re-send After Receive Error Signal No
Confidential No
Station ID 1 (20 digits/20 characters)
Off-Hook Alarm No
Remote Maintenance Yes
Call Reservation Over Manual TX Yes
RX Mode Indication LED
Resolution Indication LED
LIST REPORT
Activity Report/Journal Report Yes (up to 50)
Transmission Verification Report Yes
Coverpage Yes (Super)
Help List Yes
Call Back Message Yes
Caller ID List Yes
INTERFACE
External TAD Interface Yes
Missing Link/PC Interface No
Host Interface Yes (Auto switching : Parallel/USB*2)
LAN Interface No
*2USB for Windows98 only

I- 6
(3/4)
Model FAX4750 MFC8300
PRINTER Available with option or
download from web site Yes
Color/Mono Mono Mono
Engine Type Laser (ZL) Laser (ZL)
Resolution (dpi) 600 x 600 600 x 600
Speed (ppm) 12 12
Paper Capacity (sheets) 250 250
Additional Paper Capacity (sheets) 250 (User option) N/A
Output Paper Capacity (sheets) 150 150
Standard Print Language Windows GDI (600 x 600) Windows GDI (600 x 600)
Emulation No PCL4
Resident Fonts No 24 bitmap (PCL4 Comp.)
Fonts Disk Based No Yes (35 True type)
Paper Handling Size LTR, LGL, A4, B5, A5, EXE LTR, LGL, A4, B5, A5, EXE
Manual Feed Slot Custom size (2.75 x 5 to 8.5 x 14)
Envelop (DL/C5/CM10/Mona) Custom size (2.75 x 5 to 8.5 x 14) Envelop (DL/C5/CM10/Mona)
Other Paper Type OHP, envelopes, labels, organizer OHP, envelopes, labels, organizer
Sheet Weight (Paper Cassette) 64 to 105 g/m2(17 to 28 lb) 64 to 105 g/m2(17 to 28 lb)
(Manual Slot) 64 to 157 g/m2(17 to 43 lb) 64 to 157 g/m2(17 to 43 lb)
Printer Driver Windows3.1x, 95/98 and NT4.0 Driver with
Auto Installer Program Windows3.1x, 95/98 and NT4.0 Driver with Auto Installer Program
Utility Software No Yes (Remote printer console for PCL4)
Toner Life (High Yield : TN-430) 6,000 pages (A4, @5%) 6,000 pages (A4, @5%)
(Standard Yield : TN-460) 3,000 pages (A4, @5%) 3,000 pages (A4, @5%)
Drum Life (DR400) Up to 20,000 pages (1 page/job) Up to 20,000 pages (1 page/job)
Interface Type Parallel Parallel & USB*2
Bundled Cable No Yes (Parallel)
COPY
Color No No
Speed (ppm) Up to 12 Up to 12
Multi Copy (Stack) Up to 99 Up to 99
Multi Copy (Sort) Yes Yes
Reduction/Enlargement 50 to 200% in 1% increments 50 to 200% in 1% increments
Resolution (dpi) 300 x 600 300 x 600
SCANNER Available with Option Available with Option
Color/Mono Mono Mono
Resolution (dpi) 1,200 x 1,200 (Int.), 300 x 600 (Opt.) 1,200 x 1,200 (Int.), 300 x 600 (Opt.)
Gray Scale 256 256
TWAIN Compliant Yes Yes
Formats (Import) TIFF/BMP/PCX/DCX/BTF/BTX/MAX/PDF TIFF/BMP/PCX/DCX/BTF/BTX/MAX/PDF
Formats (Export) TIFF/BMP/MAX/PDF TIFF/BMP/MAX/PDF
OCR Yes (ScanSoft TextBridge) Yes (ScanSoft TextBridge)
MESSAGE CENTER/MESSAGE MANAGER No No
ICM Recording Time N/A N/A
Page Memory N/A N/A
OGM (MC/MC Pro/Paging) N/A N/A
TAD Type N/A N/A
Memo/Recording Conversation N/A N/A
Toll Saver N/A N/A
*2USB for Windows98 only

I- 7
(3/4)
Model MFC8600
PRINTER Yes
Color/Mono Mono
Engine Type Laser (ZL)
Resolution (dpi) 600 x 600
Speed (ppm) 12
Paper Capacity (sheets) 250
Additional Paper Capacity (sheets) 250 (User option)
Output Paper Capacity (sheets) 150
Standard Print Language Windows GDI (600 x 600)
Emulation PCL4
Resident Fonts 24 bitmap (PCL4 Comp.)
Fonts Disk Based Yes (35 TrueType)
Paper Handling Size LTR, LGL, A4, B5, A5, EXE
Manual Feed Slot Custom Size (2.75x5 to 8.5x14)
Envelop (DL/C5/CM10/Mona)
Other Paper Type OHP, envelopes, labels, organizer
Sheet Weight (Paper Cassette) 64 to 105 g/m2 (17 to 28 lb)
(Manual Slot) 64 to 157 g/m2 (17 to 43 lb)
Printer Driver Windows3.1x, 95/98 and NT4.0 Driver with
Auto Installer Program
Utility Software Yes (Remote printer console for PCL4)
Toner Life (High Yield : TN-430) 6,000 pages (A4, @5%)
(Standard Yield : TN-460) 3,000 pages (A4, @5%)
Drum Life (DR400) Up to 20,000 pages (1 page/job)
Interface Type Parallel & USB*2
Bundled Cable Yes (Parallel)
COPY
Color No
Speed (ppm) Up to 12
Multi Copy (Stack) Up to 99
Multi Copy (Sort) Yes
Reduction/Enlargement 50 to 200% in 1% increments
Resolution (dpi) 300 x 600
SCANNER Yes
Color/Mono Mono
Resolution (dpi) 1,200 x 1,200 (Int.)/300 x 600 (Opt.)
Gray Scale 256
TWAIN Compliant Yes
Formats (Import) TIFF/BMP/PCX/DCX/BTF/BTX/MAX/PDF
Formats (Export) TIFF/BMP/MAX/PDF
OCR Yes (ScanSoft TextBridge)
MESSAGE CENTER/MESSAGE MANAGER No
ICM Recording Time N/A
Page Memory N/A
OGM (MC/MC Pro/Paging) N/A
TAD Type N/A
Memo/Recording Conversation N/A
Toll Saver N/A
*2USB for Windows98 only

I- 8
(4/4)
Model FAX4750 MFC8300
Fax Forwarding Yes Yes
Fax Retrieval Yes Yes
Paging Yes Yes
Remote Access Yes Yes
MESSAGE CENTER Pro/MESSAGE
MANAGER Pro No No
Fax & Voice Mail Box N/A N/A
Fax- & Voice-on-Demand N/A N/A
MESSAGE CENTER (PC MC) No No
Fax Forwarding N/A N/A
Paging N/A N/A
ICM Recording Time N/A N/A
OGM MC/MC Pro/Paging N/A N/A
Fax & Voice Mail Box N/A N/A
Fax- & Voice-on-Demand N/A N/A
VIDEO CAPTURE No No
Video Capture N/A N/A
Video Print N/A N/A
Video Format N/A N/A
BUNDLED SOFTWARE
For Windows
Printer Driver (Brother) Available with option Yes
Viewer (ScanSoft) Available with option Available with option
TWAIN (Brother) Available with option Available with option
PC Fax (SMSI)*3Available with option Available with option
For iMAC
Printer Driver (InfoWAVE) N/A Yes
Viewer (InfoWAVE) N/A N/A
TWAIN (InfoWAVE) N/A N/A
PC Fax (SMSI or InfoWAVE) N/A N/A
*3The parallel interface only works.

I- 9
(4/4)
Model MFC8600
Fax Forwarding Yes
Fax Retrieval Yes
Paging Yes
Remote Access Yes
MESSAGE CENTER Pro/MESSAGE
MANAGER Pro No
Fax & Voice Mail Box N/A
Fax- & Voice-on-Demand N/A
MESSAGE CENTER (PC MC) No
Fax Forwarding N/A
Paging N/A
ICM Recording Time N/A
OGM MC/MC Pro/Paging N/A
Fax & Voice Mail Box N/A
Fax- & Voice-on-Demand N/A
VIDEO CAPTURE Yes
Video Capture Yes (Color)
Video Print Yes (Mono)
Video Format NTSC
BUNDLED SOFTWARE
For Windows
Printer Driver (Brother) Yes
Viewer (ScanSoft) Yes
TWAIN (Brother) Yes
PC Fax (SMSI)*3Yes
For iMAC
Printer Driver (InfoWAVE) Yes
Viewer (InfoWAVE) Yes
TWAIN (InfoWAVE) Yes
PC Fax (SMSI or InfoWAVE) Yes
*3The parallel interface only works.

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 PC/AT-compatible computer (which is capable of running MS-
DOS or its compatible OS).
Connecting the facsimile 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.

II - 2
Installing the update data onto the flash ROM of the facsimile equipment
NOTE: The following is an installation procedure example on a PC that is running Windows 95/98.
(1) Copy the update data and transfer utility onto the desired directory of the hard disk.
e.g., C:\UPDATE
(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. In the above
example, type C:\from the command line and press the ENTER key.
Then type CD UPDATE 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:
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