Brother DCP-8070D / DCP-8080DN / DCP-8085DN / MFC-8370DN / MFC-8380DN / MFC-8480DN / MFC-8880DN / MFC-8890DW Laser FAX/MFC Servi

Confidential Laser FAX/MFC SERVICE MANUAL Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. September 2009 SM-FAX105 8C5D01 (2) MODEL: DCP- 8070D/8080DN/8085DN MFC-8370DN/8380DN MFC-8480DN/8880DN/8890DW

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. The Fuji Xerox 4024 II is a registered trademark of Fuji Xerox. The Proprinter XL is a registered trademark of IBM. The FX-850 is a registered trademark of Epson. © 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.

Confidential Model DCP- 8070D DCP- 8080DN DCP- 8085DN MFC- 8370DN MFC- 8380DN MFC- 8480DN MFC- 8880DN MFC- 8890DW Duplex Print/ Scan Yes/No Yes/No Yes/Yes Yes/No Yes/Yes Yes/No Yes/Yes Yes/Yes Network No Wired Wired Wired Wired Wired Wired Wired/ Wireless Document Scanner Module CIS CCD CCD CIS CIS CCD CCD CCD

i Confidential PREFACE This service manual contains basic information required for after-sales service of the Laser 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-8070D/8080DN/8085DN, MFC-8370DN/8380DN/ 8480DN/8880DN/8890DW 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/REASSEMBLY 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. CHAPTER 7: SERVICE FUNCTIONS Describes the maintenance mode which is exclusively designed for the purpose of checking the settings and adjustments using the keys on the panel. This chapter also covers hidden function menus, which activate settings and functions or reset the parts life.

ii Confidential CHAPTER 8: CIRCUIT DIAGRAMS, WIRING DIAGRAM Provides the Circuit Diagrams and Wiring diagram for the connections of the PCBs. APPENDIX 1: WORKER SWITCH (WSW) APPENDIX 2: DELETION OF USER SETTING INFORMATION, etc. Provides instructions on how to delete such as user setting information recorded 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. A thorough understanding of this machine, based on information in this service manual, 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 one of the following interface cables. (1) A shielded parallel interface cable with twisted-pair conductors and that it is marked IEEE 1284 compliant. (2) A USB cable. The cable must not be more than 2 meters long. IEC 60825-1 specification (220 to 240 volt model only) This machine is a Class 1 laser product as defined in IEC 60825-1 specifications. The label shown below is attached in countries where it is needed. This machine has a Class 3B laser diode which produces invisible laser radiation in the laser unit. You should not open the laser unit under any circumstances. Caution Use of controls or adjustments or performance of procedures other than those specified in this manual may result in hazardous radiation exposure. For Finland and Sweden LUOKAN 1 LASERLAITE KLASS 1 LASER APPARAT Varoitus! Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altistaa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteilylle. Varning Om apparaten används på annat sätt än i denna Bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laserklass 1. CLASS 1 LASER PRODUCT APPAREIL À LASER DE CLASSE 1 LASER KLASSE 1 PRODUKT

iv Confidential Internal laser radiation Maximum radiation power: 5 mW Wave length: 770 - 810 nm Laser class: Class 3B EU Directive 2002/96/EC and EN50419 (European Union only) This equipment is marked with the above recycling symbol. 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. (European Union only)

v Confidential For USA and Canada Federal Communications Commission (FCC) Declaration of Conformity (For USA) Responsible Party: Brother International Corporation 100 Somerset Corporate Boulevard P.O. Box 6911 Bridgewater, NJ 08807-0911 USA Telephone: (908) 704-1700 declares, that the products Product name: Laser MFC DCP-8070D/8080DN/8085DN, MFC-8480DN/8370DN/ 8380DN/8880DN/8890DW 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.

vi Confidential 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. Laser Safety (110 to 120 volt model only) This machine is certified as a Class 1 laser product under the U.S. 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 machine does not produce hazardous laser radiation. Since radiation emitted inside the machine is completely confined within protective housings and external covers, the laser beam cannot escape from the machine during any phase of user operation. FDA Regulations (110 to 120 volt model only) The U.S. Food and Drug Administration (FDA) has implemented regulations for laser products manufactured on and after August 2, 1976. Compliance is mandatory for products marketed in the United States. The following label on the back of the machine indicates compliance with the FDA regulations and must be attached to laser products marketed in the United States. Internal laser radiation Maximum radiation power: 5 mW Wave length: 770 - 810 nm Laser class: Class 3B MANUFACTURED: Brother Technology (Shenzhen) Ltd. NO6 Gold Garden Ind., Nanling Buji, Longgang, Shenzhen, China This product complies with FDA performance standards for laser products except for deviations pursuant to Laser Notice No.50, dated July 26, 2001.

vii Confidential SAFETY PRECAUTIONS To use the machine safely Please keep these instructions for later reference and read them before attempting any maintenance. WARNING Do not use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner dust to ignite inside the vacuum cleaner, potentially starting a fire. Please carefully clean the toner dust with a dry, lint-free cloth and dispose of it according to local regulations. Note : If there are faxes in the machine's memory, you need to print them or save them before you turn off the power and unplug the machine. There are high voltage electrodes inside the machine. Before you clean the inside of the machine, make sure you have unplugged the telephone line cord first and then the power cord from the AC power outlet. Do not handle the plug with wet hands. Doing this might cause an electrical shock. After you use the machine, some internal parts are extremely HOT! To prevent injuries, be careful not to put your fingers in the areas shown in the illustration. The fuser unit is marked with a caution label. Please do not remove or damage the label. To prevent injuries, be careful not to put your hands on the edge of the machine under the scanner cover. To prevent injuries, be careful not to put your fingers in the area shown in the illustrations.

Brother DCP-8070D / DCP-8080DN / DCP-8085DN / MFC-8370DN / MFC-8380DN / MFC-8480DN / MFC-8880DN / MFC-8890DW Laser FAX/MFC Servi

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