Brother 1920CN - Color Inkjet - Fax User manual

MULTI-FUNCTION CENTER
SERVICE MANUAL
MODEL: MFC9600/MFC9850/MFC9870
DCP1200/MFC9750

© Copyright Brother 2000
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 machine. It includes information required for field troubleshooting
and repair--disassembly, reassembly, and lubrication--so that service personnel will be able to
understand machine function, to rapidly repair the machine and order any necessary spare parts.
To perform appropriate maintenance so that the machine 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

CHAPTER I. GENERAL DESCRIPTION
CONTENTS
1. MACHINE OUTLINE.............................................................................................I-1
1.1External Appearance and Weight.................................................................I-1
1.2Components.................................................................................................I-1
2. SPECIFICATIONS................................................................................................I-2

I- 1
1. MACHINE OUTLINE
1.1 External Appearance and Weight
The figure below shows the machine appearance and approximate dimensions.
Weight: Machine proper 15.2 kg
Machine (incl. drum unit & toner cartridge) 17.0 kg
In package 21.2 kg
1.2 Components
The machine consists of the following major components:

I- 2
2. SPECIFICATIONS (1/6)
Machine Type Multi-Function Center w/ Fax Multi-Function Center w/o Fax
Model MFC9600 DCP1200
GENERAL
Print Engine Laser (ZL) Laser (ZL)
Modem Speed (bps) 14,400 (Fax) 
Transmission Speed (sec.) 5
ITU-T Group G3 
Coding System MH/MR/MMR/JBIG 
Input/Output Width FB: 8.5" x 11"
ADF: 5.8" to 8.5"/2.75" to 8.5" FB: 8.5" x 11" ADF: 5.8" to 8.5"/2.75" to 8.5"
ADF (pages) Up to 50 Up to 50
LCD 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 8 MB 8 MB
Backup Memory No No
Optional Memory Yes (8 & 16 MB) Yes (8 & 16 MB)
Dimensions w/ Carton (WxDxH) 23.5 x 22.3 x 22.8 inches
598 x 567 x 580 mm 23.5 x 22.3 x 22.8 inches 598 x 567 x 580 mm
Dimensions w/o Carton (WxDxH) 19.4x18x16.9 inches
492x456x429 mm 19.4x18x16.9 inches 492x456x429 mm
Weight w/o Carton 17 kg 17 kg
Weight w/ Carton 21.2 kg 21.2 kg
Color Gray 1495 Gray 1495
Standby Mode Yes Yes
PC-Fax Protocol Compliance Class 2 
Simultaneous Operation Yes (Print/Fax, Print/Copy, Print/Scan) Yes (Print/Copy, Print/Scan)
Energy Star Compliance Yes Yes
Operating Environment
Temperature
Humidity 5°C to 35°C 60% ±25% 5°C to 35°C 60% ±25%
Power Source 120 VAC, 50/60 Hz 120 VAC, 50/60 Hz
Power Consumption
(Sleep/Standby/Peak) Less than 14W/60W/850W Less than 14W/60W/850W
On/Off Switch No Yes
TELEPHONE No
Automatic Redial Yes
Handset No
One-Touch Dial 32 (16x2)
Speed Dial 100
Max. Number of Digits for One-
Touch & Speed Dial 20 digits
Registerable Number Of
Characters 15 chars
Telephone Index Yes (Normal)
Speaker Phone No (Only On-HOOK/Monitor Available)

I- 3
(1/6)
Machine Type Multi-Function Center w/ Fax Multi-Function Center w/ Fax
Model MFC9870 MFC9850
GENERAL
Print Engine Laser (ZL) Laser (ZL)
Modem Speed (bps) 14,400 (Fax) 14,400 (Fax)
Transmission Speed (sec.) 5 5
ITU-T Group G3 G3
Coding System MH/MR/MMR/JBIG MH/MR/MMR/JBIG
Input/Output Width FB: 8.5" x 11"
ADF: 5.8" to 8.5"/2.75" to 8.5" FB: 8.5" x 11" ADF: 5.8" to 8.5"/2.75" to 8.5"
ADF (pages) Up to 50 Up to 50
LCD 16 chars x 2 lines 16 chars x 2 lines
On-Screen Programming Yes Yes
Backup Clock Yes (9 hours) Yes (9 hours)
Memory Capacity 4 MB (RAM) + 4 MB (flash ROM) 4 MB (RAM) + 2 MB (flash ROM)
Backup Memory 2 MB (flash ROM) 2 MB (flash ROM)
Optional Memory Yes (RAM: 8 & 16 MB, ROM: 4 & 2 MB) Yes (RAM: 8 & 16 MB)
Dimensions w/ Carton (WxDxH) 23.5 x 22.3 x 22.8 inches
598 x 567 x 580 mm 23.5 x 22.3 x 22.8 inches 598 x 567 x 580 mm
Dimensions w/o Carton (WxDxH) 19.4x18x16.9 inches
492x456x429 mm 19.4x18x16.9 inches 492x456x429 mm
Weight w/o Carton 17 kg 17 kg
Weight w/ Carton 21.2 kg 21.2 kg
Color Gray 1495 Gray 1495
Standby Mode Yes Yes
PC-Fax Protocol Compliance Class 2 
Simultaneous Operation Yes (Print/Fax, Print/Copy, Print/Scan) Yes (Print/Fax, Print/Copy, Print/Scan)
Energy Star Compliance Yes Yes
Operating Environment
Temperature
Humidity 5°C to 35°C 60% ±25% 5°C to 35°C 60% ±25%
Power Source 220 VAC, 50/60 Hz 220 VAC, 50/60 Hz
Power Consumption
(Sleep/Standby/Peak) Less than 14W/60W/800W Less than 14W/60W/800W
On/Off Switch No No
TELEPHONE
Automatic Redial Yes Yes
Handset No No
One-Touch Dial 32 (16x2) 32 (16x2)
Speed Dial 100 100
Max. Number of Digits for One-
Touch & Speed Dial 20 digits 20 digits
Registerable Number Of
Characters 15 chars 15 chars
Telephone Index Yes (Normal) Yes (Normal)
Speaker Phone No No

I- 4
(1/6)
Machine Type Multi-Function Center w/o Fax
Model MFC9750
GENERAL
Print Engine Laser (ZL)
Modem Speed (bps) 
Transmission Speed (sec.) 
ITU-T Group 
Coding System 
Input/Output Width FB: 8.5" x 11"
ADF: 5.8" to 8.5"/2.75" to 8.5"
ADF (pages) Up to 50
LCD 16 chars x 2 lines
On-Screen Programming Yes
Backup Clock No
Memory Capacity 4 MB (RAM)
Backup Memory No
Optional Memory Yes (RAM: 8 & 16 MB)
Dimensions w/ Carton (WxDxH) 23.5 x 22.3 x 22.8 inches
598 x 567 x 580 mm
Dimensions w/o Carton (WxDxH) 19.4x18x16.9 inches
492x456x429 mm
Weight w/o Carton 17 kg
Weight w/ Carton 21.2 kg
Color Gray 1495
Standby Mode Yes
PC-Fax Protocol Compliance 
Simultaneous Operation Yes (Print/Copy, Print/Scan)
Energy Star Compliance Yes
Operating Environment
Temperature
Humidity 5°C to 35°C 60% ±25%
Power Source 220 VAC, 50/60 Hz
Power Consumption
(Sleep/Standby/Peak) Less than 14W/60W/800W
TELEPHONE No
Automatic Redial
Handset
One-Touch Dial
Speed Dial
Max. Number of Digits for One-
Touch & Speed Dial
Registerable Number Of
Characters
Telephone Index
Speaker Phone