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FACSIMILE EQUIPMENT
SERVICE MANUAL
MODELS: MFC7420/7820N
DCP7010/7020/7025
Confidential
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© Copyright Brother 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. Confidential
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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 mainte
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CHAPTER 8 MAINTENANCE MODE Describes the maintenance mode which is exclusively designed for the purpose of checks, settings and adjustments using the keys on the control panel. In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper feed roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area, for example. You can a
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TABLE OF CONTENTS CHAPTER 1 PARTS NAMES & FUNCTIONS 1.1 EQUIPMENT OUTLINE.............................................................................................1-1 1.2 CONTROL PANEL....................................................................................................1-2 1.3 COMPONENTS.........................................................................................................1-4 CHAPTER 2 SPECIFICATIONS 2.1 GENGERAL.......................................
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CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION 5.1 DISASSEMBLY/REASSEMBLY...............................................................................5-1 Safety Precautions........................................................................................................5-1 Tightening Torque.........................................................................................................5-2 Preparation .......................................................................
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5.1.24 Tail Edge Actuator..............................................................................................5-58 5.1.25 Regist Front Actuator/Regist Front Spring .........................................................5-58 5.1.26 Regist Sensor PCB ASSY..................................................................................5-59 5.1.27 Regist Rear Actuator/Regist Rear Spring...........................................................5-59 5.1.28 Fan Motor 60 Unit...........
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CHAPTER 7 CLEANING CHAPTER 8 MAINTENANCE MODE 8.1 ENTRY INTO THE MAINTENANCE MODE .............................................................8-1 8.2 LIST OF MAINTENANCE MODE FUNCTIONS........................................................8-2 8.3 USER-ACCESS TO THE MAINTENANCE MODE ...................................................8-3 8.4 DETAILED DESCRIPTION OF MAINTENANCE MODE FUNCTIONS....................8-4 8.4.1 EEPROM Parameter Initialization (Function code 01/91) ............
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CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING 9.1 ERROR INDICATION................................................................................................9-1 9.1.1 Equipment Errors.................................................................................................9-1 [ 1 ] Error messages appearing on the LCD .......................................................9-1 [ 2 ] Error codes shown in the "MACHINE ERROR X X" messages...................9-5 9.1.2 Communications E
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APPENDIX 6 CIRCUIT DIAGRAMS NCU PCB: MFC7420 (U.S.A. and CANADA models) NCU PCB: MFC7820N (U.S.A. and CANADA models) NCU PCB: MFC7420 (EUROPE models) NCU PCB: MFC7820N (EUROPE models) Power Supply PCB 100V (U.S.A. and CANADA models) Power Supply PCB 200V (EUROPE models) viii Confidential
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SAFETY PRECAUTIONS To use the MFC safely Please keep these instructions for later reference and read them before attempting any maintenance. NOTE: If there are faxes in the MFC's memory, you need to print them or save them before you turn off the power and unplug the MFC. (For MFC-7420) WARNING There are high voltage electrodes inside the MFC. Before you clean the inside of the MFC, make sure you have unplugged the telephone line cord first and then the power cord from the AC p
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WARNING • When you move the MFC, grasp the side hand holds that are under the scanner. DO NOT carry the MFC by holding it at the bottom. • Use caution when installing or modifying telephone lines. Never touch telephone wires or terminals that are not insulated unless the telephone line has been disconnected at the wall jack. Never install telephone wiring during a lightning storm. Never install a telephone wall jack in a wet location. • This product must be installed near an AC po
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CHOOSING A LOCATION Place your MFC on a flat, stable surface that is free of vibration and shocks, such as a desk. Put the MFC near a telephone wall jack and a standard, grounded AC power outlet. Choose a location where the temperature remains between 50°F and 90.5°F (10°C and 32.5°C). CAUTION • Avoid placing your MFC in a high-traffic area. • Do not place the MFC near heaters, air conditioners, water, chemicals, or refrigerators. • Do not expose the MFC to direct sunlight, excessi
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CHAPTER 1 PARTS NAMES & FUNCTIONS Confidential
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CHAPTER 1 PARTS NAMES & FUNCTIONS This chapter 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. CONTENTS 1.1 EQUIPMENT OUTLINE...................................................................................................1-1 1.2 CONTROL PANEL........................................................................................................
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1.1 EQUIPMENT OUTLINE Front view Automatic Document Feeder (ADF) ADF Document Output Support Flap Control Panel Face-down Output Tray Support Flap with Extension (Support Flap) Document Cover Manual Feed Slot Power Switch Front Cover Paper Tray Rear view AC Power Connector Back Cover USB Interface Connector Parallel Interface Connector 10/100 Baser TX Port (MFC7820N only) 1-1 Confidential
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1.2 CONTROL PANEL MFC-7420 and MFC-7820N have similar control keys. 12 11 10 9 8 1 2 3 4 5 6 7 1. One-Touch Keys 6. Dial Pad Keys These 4 keys give you instant access to 8 previously Use these keys to dial telephone or fax numbers and as a stored numbers. keyboard for entering information into the MFC. The # key lets you temporarily switch the dialing mode 2. Shift Key during a telephone call from Pulse to Tone. To access One-Touch numbers 5 to 8, hold down Shift as you
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5. Navigation Keys 11. Copy Keys (Temporary settings) Menu/Set Enlarge/Reduce The same key is used for Menu and Set operations. Lets Lets you reduce or enlarge copies depending upon the you access the Menu to program and store your settings ratio you select. in the MFC. Options You can quickly and easily select temporary settings for When listening to the speaker in Fax mode or on copying. standby, you can press these keys to adjust the volume. 12. Printer Key Search/Speed
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1.3 COMPONENTS The equipment consists of the following major components: ADF Unit Panel Unit NCU PCB Scanner Unit Inner Chute Speaker ASSY Joint Cover ASSY Rear Chute Cover Laser Unit Rear Cover Side Cover R Fixing Unit Battery ASSY PS PCB Unit Main PCB Frame Unit Front Cover Paper Tray Side Cover L High-voltage PS PCB 1-4 Confidential
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CHAPTER 2 SPECIFICATIONS Confidential
