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FACSIMILE EQUIPMENT SERVICE MANUAL MODELS: MFC620CN MFC420CN/410CN MFC210C FAX2440C DCP310CN/110C Confidential © Copyright Brother 2004-2005 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. Confidential Preface This Service Manual is intended for use by service personnel and details the specifications, construction, theory of operation, and maintenance for the Brother machines noted on the front cover. It includes information required for troubleshooting and service--disassembly, reassembly, and lubrication--so that service personnel will be able to understand equipment function, repair the equipment in a timely manner and order spare parts as necessary. To perform appropriate maintenance so that the machine is always in the best possible condition for the customer, service personnel must adequately understand and apply this manual. How this manual is organized This manual is made up of nine chapters and appendices. CHAPTER 1 PARTS NAMES AND FUNCTIONS Contains external views and names of components and describes their functions. Information about the keys on the control panel is included to help you check operation or make adjustments. CHAPTER 2 SPECIFICATIONS Lists the specifications of each model, which enables you to make a comparison of different models. CHAPTER 3 THEORY OF OPERATION Gives an overview of the scanning and printing mechanisms as well as the sensors, actuators, and control electronics. It aids in understanding the basic principles of operation as well as locating defects for troubleshooting. CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR Describes how to transfer data left in the machine to be sent for repair. The service personnel should instruct end users to follow the transfer procedure given in this chapter if the machine at the user site cannot print received data due to the printing mechanism defective. End users can transfer received data to another machine to prevent data loss. CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION Details procedures for disassembling and reassembling the machine together with related notes. The disassembly order flow provided enables you to see at a glance the quickest way to get to component(s) involved. At the start of a disassembly job, you check a disassembly order flow that guides you through a shortcut to the object components. This chapter also covers screw tightening torques and lubrication points to which the specified lubricants should be applied during reassembly jobs. CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS REPLACEMENT Details adjustments and updating of settings, which are required if the head/carriage unit, main PCB and some other parts have been replaced. CHAPTER 7 CLEANING Provides cleaning procedures not covered by the User's Manual. Before starting any repair work, c