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