Brother MFC-9320CW User manual

Confidential
July 2009
SM-FAX113
8CE203
(1)
Color FAX/MFC
SERVICE MANUAL
MODEL: DCP-9010CN/MFC-9010CN
MFC-9120CN/MFC-9320CW
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.

Confidential
TRADEMARKS
The Brother logo is a registered trademark of Brother Industries, Ltd.
Apple and Macintosh are trademarks of Apple Inc., registered in the United States and other countries.
PCL is either a trademark or a registered trademark of Hewlett-Packard Company in the United States
and other countries.
Windows Vista is either a registered trademark or a trademark of Microsoft Corporation in the United
States and/or other countries.
Microsoft, Windows, Windows Server and Internet Explorer are registered trademarks of Microsoft
Corporation in the United States and/or other countries.
Linux is a registered trademark of Linus Torvalds in the United States and other countries.
PostScript and PostScript3 are either registered trademarks or trademarks of Adobe Systems
Incorporated in the United States and/or other countries.
ENERGY STAR is a U.S. registered mark.
Citrix and MetaFrame are registered trademarks of Citrix Systems, Inc. in the United States.
Intel, Intel Xeon and Pentium are trademarks or registered trademarks of Intel Corporation.
AMD, AMD Athlon, AMD Opteron and combinations thereof, are trademarks of Advanced Micro
Devices, Inc.
PictBridge is a trademark.
Each company whose software title is mentioned in this manual has a Software License Agreement
specific to its proprietary programs.
All other trademarks are the property of their respective owners.
© Copyright Brother 2009
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.
All other product and company names mentioned in this manual
are trademarks or registered trademarks of their respective
holders.
Specifications are subject to change without notice.

iConfidential
PREFACE
This service manual contains basic information required for after-sales service of the Multi-
Function Center (hereinafter referred to as “the machine”). This information is vital to the service
personnel to maintain the high printing quality and performance of the machine.
This service manual covers the DCP-9010CN, MFC-9010CN/9120CN/9320CW machines.
This manual consists of the following chapters:
CHAPTER 1: SPECIFICATIONS
Provides specifications of each model, which enables you to make a comparison of the
different models.
CHAPTER 2: THEORY OF OPERATION
Gives an overview of the printing mechanisms as well as the sensors, actuators, and control
electronics. It aids in understanding the basic principles of operations as well as locating
defects for troubleshooting.
CHAPTER 3: ERROR INDICATION AND TROUBLESHOOTING
Details of error messages and codes that the incorporated self-diagnostic function of the
machine will display if any error or malfunction occurs. If any error message appears, refer to
this chapter to find which parts should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main sections
of the machine and related troubleshooting procedures.
CHAPTER 4: PERIODICAL MAINTENANCE
Details of consumable parts and periodical maintenance parts. This chapter also covers
procedures for disassembling and assembling periodical maintenance parts.
CHAPTER 5: DISASSEMBLY AND ASSEMBLY
Details of procedures for disassembling and assembling of the machine together with related
notes. The disassembly order flow provided enables you to see at a glance the quickest way
to get to parts involved.
At the start of a disassembly job, you can check the disassembly order flow that guides you
through a shortcut to get to the object parts.
This chapter also covers screw tightening torques and lubrication points to which the specified
lubrications should be applied during assembly jobs.
CHAPTER 6: ADJUSTMENTS AND UPDATING OF SETTINGS,
REQUIRED AFTER PARTS REPLACEMENT
Details of adjustments and updating of settings, which are required if the main PCB and some
other parts have been replaced. This chapter also covers how to update the firmware.

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CHAPTER 7: SERVICE FUNCTIONS
Describes the maintenance mode which is exclusively designed for the purpose of checking
the settings and adjustments using the buttons on the control panel.
This chapter also covers not-disclosed-to-users function menus, which activate settings and
functions or reset the parts life.
CHAPTER 8: CIRCUIT DIAGRAMS & WIRING DIAGRAM
Provides the Circuit Diagrams and Wiring Diagram for the connections of the PCBs.
APPENDIX 1: WORKER SWITCH (WSW)
Describes the functions of the worker switches.
APPENDIX 2: DELETION OF USER SETTING INFORMATION etc.
Provides instructions on how to delete user setting information etc. stored in the machine.
APPENDIX 3: SERIAL NUMBERING SYSTEM
APPENDIX 4: SCREW CATALOGUE
APPENDIX 5: REFERENCES
APPENDIX 6: GLOSSARY
Information in this manual is subject to change due to improvement or redesign of the product.
All relevant information in such cases will be supplied in service information bulletins (Technical
Information).
A thorough understanding of this machine, based on information in this service manual and
service information bulletins, is required for maintaining its print quality performance and for
improving the practical ability to find the cause of problems.

iii Confidential
REGULATION
For Europe and Other Countries
■Radio interference (220 to 240 volt model only)
This machine follows EN55022 (CISPR Publication 22)/Class B.
Before you use this product, make sure that you use the following interface cable.
- A USB cable.
The cable must not be more than 2 meters long.
■EU Directive 2002/96/EC and EN50419
(European Union only)
This equipment is marked with the recycling symbol below. It means that at the end of the life
of the equipment you must dispose of it separately at an appropriate collection point and not
place it in the normal domestic unsorted waste stream. This will benefit the environment for all.

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For USA and Canada
■Federal Communications Commission (FCC) Declaration of Conformity
(For USA)
declares, that the products
complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and (2) this device must accept any
interference received, including interference that may cause undesired operation.
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which can
be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
- Consult the dealer or an experienced radio/TV technician for help.
Important
A shielded interface cable should be used to ensure compliance with the limits for a Class B
digital device. Changes or modifications not expressly approved by Brother Industries, Ltd.
could void the user’s authority to operate the equipment.
■Industry Canada Compliance Statement (For Canada)
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme à la norme NMB-003 du Canada.
Responsible Party: Brother International Corporation
100 Somerset Corporate Boulevard
P. O . B o x 6 9 11
Bridgewater, NJ 08807-0911
USA
Telephone: [phone]
Product name: Color MFC
DCP-9010CN, MFC-9010CN/9120CN/9320CW

vConfidential
SAFETY INFORMATION
■Definitions of Warnings, Cautions, Notes and Memos
The following conventions are used in this manual:
Mark Contents
Warnings tell you what to do to prevent possible personal injury.
Electrical Hazard icons alert you to a possible electrical shock.
Hot Surface icons warn you not to touch machine parts that are hot.
Cautions specify procedures you must follow or avoid to prevent
possible damage to the machine or other objects.
Note Notes tell you useful tips when servicing the machine.
Memo Memo tells you bits of knowledge to help understand the machine.

vi Confidential
■Safety Precautions
Listed below are the various kinds of “WARNING” messages included in this manual.
WARNING
There are high voltage electrodes inside the machine. Before you clean the inside of the
machine or replace parts, make sure that you have turned off the power switch and
unplugged the machine from the AC power outlet.
DO NOT handle the plug with wet hands. Doing this might cause an electrical shock.
The fuser unit becomes extremely hot during operation. Wait until it has cooled down
sufficiently before replacing consumable items. DO NOT remove or damage the caution
label located on or around the fuser.

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WARNING
To prevent injuries, be careful not to put your hands on the edge of the machine under the
document cover as shown in the illustration.
To prevent injuries, be careful not to put your fingers in the areas shown in the illustrations.

viii Confidential
WARNING
DO NOT use flammable substances, any type of spray or any organic solvent/liquids
contains alcohol or ammonia to clean the inside or outside of the machine. Doing this may
cause a fire or electrical shock.
If the machine becomes hot, blows smoke, or generates obscure odor, immediately turn off
the power switch and unplug the machine from the AC power outlet.
If metal objects, water or other liquids get inside the machine, immediately turn off the
power switch and unplug the machine from the AC power outlet.
This machine is heavy and weighs approximately 22.9 kg (50.5 lb). To prevent injuries
when moving or lifting this machine, make sure to use at least two people. Be careful not to
pinch your fingers when you set the machine back down.
CAUTION
Lightning and power surges can damage this product! We recommend that you use a
quality surge protection device on the AC power line, or unplug the machine during a
lightning storm.
Violently closing the top cover without mounting the toner cartridge and the drum unit can
damage this product.