Brother 8840D free download

File name Brother8840d_service.pdf

SERVICE MANUAL MODEL: MFC8440/8840D/8840DN DCP8040/8045D/8045DN Read this manual thoroughly before maintenance work. Keep this manual in a convenient place for quick and easy reference at all times. © Copyright Brother Industries, Ltd. 2004 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. Trademarks: The brother logo is a registered trademark of Brother Industries, Ltd. Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and other countries, and TrueType is a trademark of Apple computer, Inc. Microsoft and MS-DOS are registered trademarks of Microsoft Corporation. Windows is a registered trademark of Microsoft Corporation in the U.S. and other countries. MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN SERVICE MANUAL 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 1: GENERAL CHAPTER 2: INSTALLATION AND BASIC OPERATION CHAPTER 3: THEORY OF OPERATION CHAPTER 4: DISASSEMBLY AND RE-ASSEMBLY CHAPTER 5: PERIODIC MAINTENANCE CHAPTER 6: TROUBLESHOOTING CHAPTER 7: MAINTENANCE MODE APPENDIX 1: EEPROM CUSTOMIZING CODES APPENDIX 2: INSTALLING THE UPDATE DATA APPENDIX 3: FIRMWARE SWITCHS (WSW) APPENDIX 4: CIRCUIT DIAGRAMS 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 printer, 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. i TABLE OF CONTENTS TABLE OF CONTENTS REGULATION ... viii SAFETY INFORMATION ...