Brother MFC-8460N Manual de usuario

Confidential

FACSIMILE EQUIPMENT

SERVICE MANUAL

MODELS: MFC-8460N/8860DN/8870DW

DCP-8060/8065DN

Confidential

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.

i 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,

clean the machine as it may solve the problem concerned.

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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 CCD scanner area,

for example. You can also customize the EEPROM according to the shipment destination of the

machine concerned. In addition, you can perform operational checks of the LCD, control panel

PCB or sensors, perform a print test, display the log information or error codes, and modify

firmware switches (WSW).

CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING

Details error messages and codes that the incorporated self-diagnostic functions display if any

error or malfunction occurs. If any error message appears, refer to this chapter to find which

components 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. This will help service personnel pinpoint and

repair defective components.

APPENDIX 1 SERIAL NUMBERING SYSTEM

Shows the location of serial number labels put on some parts and lists the coding information

pertaining to the serial numbers.

APPENDIX 2 FIRMWARE INSTALLATION

Provides instructions on how to update firmware stored in the flash ROM on the main PCB or load

firmware to a new main PCB from the host PC.

No hardware replacement is required for updating.

APPENDIX 3 CUSTOMIZING CODES ACCORDING TO SHIPPING DESTINATION

Lists the customizing codes for the various preferences exclusively designed for each destination

(e.g. language). Those codes are stored in the memory (EEPROM) mounted on the main PCB. If

the main PCB is replaced with a new one, therefore, you will need to set the proper customizing

codes with the machine in the maintenance mode.

APPENDIX 4 FIRMWARE SWITCHES (WSW)

Describes the functions of the firmware switches, which can be divided into two groups: one is for

customizing preferences designed for the shipping destination (as described in Appendix 3) and

the other is for modifying preferences that match the machine to the environmental conditions.

Use the latter group if the machine malfunctions due to mismatching.

APPENDIX 5 WIRING DIAGRAM

Provides the wiring diagram that helps you understand the connections between PCBs.

APPENDIX 6 CIRCUIT DIAGRAMS

Provides the circuit diagrams of the NCU PCB and power supply PCB.

APPENDIX 7 VIEWING THE EVENT LOG FILE

When installing the printer driver, the installer logs events that occur during the installation

process in the event log file. This appendix views a sample of the event log file. Selecting Start |

Program | Brother | MFL-Pro Suite model name | Installation Diagnostics reads out the event log

file.

This manual describes the models and their versions destined for major countries.

The specifications and functions are subject to change depending upon each destination.

iii Confidential

TABLE OF CONTENTS

CHAPTER 1 PARTS NAMES & FUNCTIONS

1.1 EQUIPMENT OUTLINE.............................................................................................1-1

1.2 CONTROL PANEL ....................................................................................................1-2

1.3 COMPONENTS .........................................................................................................1-7

CHAPTER 2 SPECIFICATIONS

2.1 GENERAL..................................................................................................................2-1

2.1.1 General Specifications .........................................................................................2-1

2.1.2 Paper Specifications.............................................................................................2-2

2.1.2.1 Paper handling ...............................................................................................2-2

2.1.2.2 Media specifications ....................................................................................... 2-2

2.1.3 Printable Area ................................................................................................................2-5

2.1.3.1 PCL5e/EPSON/IBM emulation ....................................................................... 2-5

2.1.3.2 PCLXL, PS (BR-Script 3)................................................................................2-8

2.1.4 Print Speeds with Various Settings ............................................................................. 2-9

2.1.5 Toner Cartridge Weight Information .........................................................................2-10

2.2 SPECIFICATIONS LIST ..........................................................................................2-11

CHAPTER 3 THEORY OF OPERATION

3.1 OVERVIEW................................................................................................................3-1

3.2 MECHANICAL COMPONENTS ................................................................................3-2

3.2.1 Scanner Mechanism ............................................................................................3-3

3.2.2 Overview of Gear .................................................................................................3-9

3.2.3 Paper Transfer ...................................................................................................3-10

3.2.3.1 Paper supply ..............................................................................................3-10

3.2.3.2 Paper registration.......................................................................................3-12

3.2.3.3 Drum unit....................................................................................................3-12

3.2.3.4 Developing .................................................................................................3-13

3.2.3.5 Fixing stage................................................................................................3-14

3.2.3.6 Paper eject .................................................................................................3-15

3.2.3.7 Duplex printing (For the models with the DX only).....................................3-16

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3.2.3.8 Paper feeding from the MP tray .................................................................3-17

3.2.3.9 LT tray........................................................................................................3-17

3.2.4 Toner Cartridge ..................................................................................................3-18

3.2.4.1 Toner life end mode ...................................................................................3-18

3.2.4.2 New toner detection mechanism................................................................ 3-20

3.2.4.3 Counter reset during indication of “Toner Life End” ...................................3-21

3.2.5 Print Process ......................................................................................................3-22

3.2.5.1 Charging..................................................................................................... 3-22

3.2.5.2 Exposure stage ..........................................................................................3-22

3.2.5.3 Transfer...................................................................................................... 3-23

3.2.6 Sensors ..............................................................................................................3-24

3.3 CONTROL ELECTRONICS .................................................................................... 3-25

3.3.1 Components .......................................................................................................3-25

CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR

4.1 TRANSFERRING RECEIVED FAX DATA ................................................................4-1

CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION

5.1 DISASSEMBLY/REASSEMBLY ...............................................................................5-1

Safety Precautions............................................................................................................5-1

Tightening Torque ............................................................................................................5-2

Harness Routing...............................................................................................................5-4

Preparation .....................................................................................................................5-21

How to Access the Object Component...........................................................................5-21

Disassembly Flowchart...................................................................................................5-22

5.1.1 AC Cord..............................................................................................................5-23

5.1.2 Drum/Toner ASSY..............................................................................................5-23

5.1.3 DX Feed ASSY (For the models with the DX only) ............................................5-24

5.1.4 Paper Tray..........................................................................................................5-24

5.1.5 Back Cover.........................................................................................................5-27

5.1.6 DX Blank Cover (For models with out the DX only) ...........................................5-27

5.1.7 Outer Chute ASSY .............................................................................................5-28

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5.1.8 Access Cover/Side Cover L ...............................................................................5-30

5.1.9 ADF Unit.............................................................................................................5-31

5.1.10 Hinge Base R .....................................................................................................5-32

5.1.11 Hinge Arm R.......................................................................................................5-33

5.1.12 Hinge ASSY L.....................................................................................................5-33

5.1.13 ADF Cover ASSY ...............................................................................................5-34

5.1.14 ADF Side Cover F ..............................................................................................5-34

5.1.15 ADF Side Cover R.............................................................................................. 5-35

5.1.16 ADF Chute ASSY ...............................................................................................5-36

5.1.17 SB Chute ASSY (For the models with the DX only) /

SX Chute (For the models with out the DX only) ...............................................5-38

5.1.18 Exit Chute Cover ASSY......................................................................................5-38

5.1.19 Earth Spring .......................................................................................................5-39

5.1.20 PF Roller Holder ASSY ......................................................................................5-40

5.1.21 LF Roller 1 ASSY ...............................................................................................5-41

5.1.22 SB Roller ASSY (For the models with the DX only) ...........................................5-42

5.1.23 ADF Motor ..........................................................................................................5-44

5.1.24 SB Solenoid ASSY (For the models with the DX only).......................................5-45

5.1.25 PF Solenoid ASSY (For the models with the DX only).......................................5-45

5.1.26 ADF Relay PCB..................................................................................................5-46

5.1.27 Paper Feed Chute ASSY ...................................................................................5-47

5.1.28 Actuator Front 1/Photo Interrupter

(For the models with the DX only)......................................................................5-48

5.1.29 Actuator Front 2/Photo Interrupter

(For the models with the DX only)......................................................................5-49

5.1.30 ADF Film/Spring Plate ADF Front A ASSY/Separation Rubber/Rubber Holder/

Separation Spring...............................................................................................5-50

5.1.31 Pressure Roller/LF Spring ..................................................................................5-50

5.1.32 LF Roller 2 ASSY ...............................................................................................5-51

5.1.33 Exit Roller ASSY.................................................................................................5-52

5.1.34 LF Roller 3 ASSY ...............................................................................................5-53

5.1.35 LF Roller 4 ASSY ...............................................................................................5-54

5.1.36 Flap A ASSY (For the models with the DX only)/

Flap A (For models with out the DX only)...........................................................5-55

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5.1.37 Document Hold/Document Hold Spring ............................................................. 5-56

5.1.38 Upper Main Chute ASSY/Lower Main Chute ASSY...........................................5-56

5.1.39 Actuator R/Photo Interrupter ..............................................................................5-58

5.1.40 Flap B .................................................................................................................5-59

5.1.41 Actuator SB/Photo Interrupter (For the models with the DX only)......................5-59

5.1.42 Document Ejection Tray.....................................................................................5-60

5.1.43 Document Cover Sensor....................................................................................5-61

5.1.44 Eject Roller B4....................................................................................................5-61

5.1.45 Presser Roller.....................................................................................................5-62

5.1.46 Panel Cover ASSY .............................................................................................5-63

5.1.47 Scanner Unit ASSY ............................................................................................5-64

5.1.48 Top Cover ASSY ................................................................................................5-65

5.1.49 Lock Lever B/Lock Lever ASSY ......................................................................... 5-65

5.1.50 CCD Module.......................................................................................................5-66

5.1.51 FFC Cable ASSY ...............................................................................................5-68

5.1.52 Scanner Motor FB ..............................................................................................5-69

5.1.53 Pulley ASSY .......................................................................................................5-70

5.1.54 Photo Interrupter ................................................................................................5-70

5.1.55 Panel Unit...........................................................................................................5-71

5.1.56 Panel PCB ASSY ...............................................................................................5-72

5.1.57 Printed Rubber Key ............................................................................................5-73

5.1.58 LCD Cover/Backlight Module/LCD .....................................................................5-74

5.1.59 NCU PCB ASSY (For the models with the NCU only) .......................................5-75

5.1.60 Speaker ASSY ...................................................................................................5-77

5.1.61 Driver PCB .........................................................................................................5-78

5.1.62 Fuser Unit...........................................................................................................5-79

5.1.63 Tray MP ASSY ...................................................................................................5-81

5.1.64 MP Tray Cover ASSY/Process Cover ASSY......................................................5-82

5.1.65 Main PCB ...........................................................................................................5-85

5.1.66 Gear Plate Calking ASSY AL/Develop Joint/Main Motor ASSY AL....................5-86

5.1.67 Main Shield Plate ASSY.....................................................................................5-88

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5.1.68 Relay Rear PCB ASSY/Connector .................................................................... 5-90

5.1.69 Relay Front PCB ASSY ..................................................................................... 5-92

5.1.70 MP Solenoid ASSY............................................................................................ 5-93

5.1.71 Drive Release Link............................................................................................. 5-94

5.1.72 T1 Solenoid ASSY ............................................................................................. 5-95

5.1.73 Toner Sensor PCB............................................................................................. 5-95

5.1.74 Register Solenoid ASSY.................................................................................... 5-96

5.1.75 Ejector Solenoid ASSY (For the models with the DX only) ............................... 5-96

5.1.76 Interlock SW ASSY............................................................................................ 5-97

5.1.77 New Toner Actuator........................................................................................... 5-97

5.1.78 Gear 17/20/23.................................................................................................... 5-98

5.1.79 Thermistor ASSY ............................................................................................. 5-100

5.1.80 Side Cover R.................................................................................................... 5-100

5.1.81 Joint Cover ASSY ............................................................................................ 5-101

5.1.82 Filter ................................................................................................................. 5-102

5.1.83 Laser Unit......................................................................................................... 5-103

5.1.84 PS PCB Unit .................................................................................................... 5-104

5.1.85 High-Voltage PS PCB ASSY ........................................................................... 5-107

5.1.86 Toner LED PCB Unit ASSY ............................................................................. 5-109

5.1.87 Fan Motor 60 Unit ............................................................................................ 5-110

5.1.88 Fan Motor 60 Unit LV....................................................................................... 5-110

5.1.89 Frame L............................................................................................................ 5-111

5.1.90 Frame R ........................................................................................................... 5-111

5.1.91 MP Unit ............................................................................................................ 5-112

5.1.92 Regist Actuator Rear/Regist Actuator Spring .................................................. 5-117

5.1.93 Regist Actuator Front/Regist Actuator Spring ................................................. 5-119

5.1.94 Roller Holder ASSY ......................................................................................... 5-120

5.1.95 PE Actuator, Edge Actuator, Edge Actuator Spring ........................................ 5-121

5.1.96 PE PG Sensor ASSY....................................................................................... 5-123

5.1.97 Wireless PCB (PCB T60H929.00 ASSY 02) (For the model with the Wireless only)

......................................................................................................................... 5-124

5.2 DISASSEMBLY/REASSEMBLY (LT-5300) ......................................................... 5-125

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5.2.2 LT Front Cover ASSY....................................................................................... 5-128

5.2.3 LT Rear Cover..................................................................................................5-129

5.2.4 LT Side Cover L ...............................................................................................5-129

5.2.5 LT Side Cover R...............................................................................................5-130

5.2.6 LT PCB ASSY ..................................................................................................5-131

5.2.7 Connector: 55533-1219....................................................................................5-132

5.2.8 Connector: 54702-1219....................................................................................5-132

5.2.9 Gear 24 LT ....................................................................................................... 5-133

5.2.10 Collar 6 .............................................................................................................5-134

5.2.11 LT Solenoid ASSY............................................................................................ 5-138

5.2.12 Roller Holder ASSY..........................................................................................5-139

5.2.13 Edge Actuator Spring .......................................................................................5-140

5.2.14 PE Actuator, Edge Actuator .............................................................................5-141

5.2.15 LT Sensor PCB ASSY...................................................................................... 5-142

5.3 LUBRICATION ......................................................................................................5-144

CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS

REPLACEMENT

6.1 IF YOU REPLACE THE MAIN PCB.......................................................................... 6-1

6.1.1 Load Update Programs/data ................................................................................ 6-1

6.1.2 Initialize the EEPROM on the Main PCB (Function code 01)...............................6-1

6.1.3 Customize the EEPROM on the Main PCB (Function code 74)........................... 6-1

6.1.4 Check the Control Panel PCB for Normal Operation (Function code 13) ............6-1

6.1.5 Make a Sensor Operation Check (Function code 32) .......................................... 6-1

6.1.6 Acquire of White Level Data and Set the CCD Scanner Area

(Function code 55) .................................................................................................6-1

6.1.7 Setting the Serial Number ....................................................................................6-1

6.1.8 Switch Back to Standby........................................................................................6-2

6.2 IF YOU REPLACE THE DOCUMENT SCANNER UNIT...........................................6-2

6.2.1 Acquire of White Level Data and Set the CCD Scanner Area

(Function code 55) ...............................................................................................6-2

6.3 IF YOU REPLACE THE DRUM UNIT .......................................................................6-2

6.4 PERIODICAL REPLACEMENT PARTS ...................................................................6-3

6.4.1 Periodical Replacement Parts ..............................................................................6-3

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