Brother MFC-L6702DW Laser Printer Manuals

Manuals and User Guides for Brother MFC-L6702DW Laser Printer. We have 1 Brother MFC-L6702DW Laser Printer manual available for free PDF download: Service Manual

Brother MFC-L6702DW Service Manual (408 pages)

Brand: Brother | Category: All in One Printer | Size: 30.81 MB

Service Manual
1
Open Source Licensing Remarks
3
Other Information
3
Table of Contents
4
Safety Information

11
- Additional Information
  17
Chapter 1 Supplemental Specifications

19
General

19
Network Connectivity

27
Service Information

28
Supplies

30
Media Specifications

33
Fax (Only for the Models with Fax Function)

33
Copy

34
Scanner

35
Chapter 2 Error Indications & Troubleshooting

36
Introduction

36
- Precautions
  36
- Checks before Commencing Troubleshooting
  37
  - Operating Environment
    37
  - Power Supply
    37
  - Consumable Parts
    37
Overview

39
- Cross-Section Drawing
  39
  - Printer Part
    39
  - Scanner Part
    40
- Paper Feeding
  41
  - Printer Part
    41
  - Scanner Part
    42
- Operation of each Part
  43
- Block Diagram
  45
- Main Components
  46
Error Indications

47
- Error Codes
  48
- Error Messages
  57
- Communication Errors
  69
Troubleshooting

73
- Error Cause and Remedy
  73
- Troubleshooting for Paper Feeding Problems
  117
  - No Paper Is Fed from Machine Paper Tray
    117
  - No Paper Is Fed from LT
    118
  - No Paper Is Fed from TT
    119
  - No Paper Is Fed from MP Tray
    120
  - Multiple Sheets of Paper Are Fed
    121
  - Paper Becomes Wrinkled
    121
  - Paper Is Fed at an Angle
    122
  - Paper Is Curled
    123
  - Duplex Printing Is Not Possible
    123
  - Paper Jam
    125
- Troubleshooting for Image Defects
  130
  - Image Defect Examples
    130
  - Troubleshooting According to Image Defect
    131
    
    Poor Fixing
    133
    
    Image Distortion
    134
    
    Faint Print
    137
    
    White Spots
    138
    
    Horizontal Lines
    141
- Troubleshooting for Software Problems
  143
  - Cannot Receive Data
    143
- Troubleshooting for Network Problems
  144
  - Cannot Print Via Network Connection
    144
  - Cannot Connect to Access Point
    144
- Troubleshooting for Control Panel Problems
  144
  - Nothing Is Displayed on the LCD
    144
  - Nothing Is Displayed on the LED
    145
  - Control Panel Is Inoperable
    145
- Troubleshooting for Toner and Drum Problems
  146
- Troubleshooting for Fuser Unit Problems
  148
  - Fuser Unit Failure
    148
- Troubleshooting for Laser Unit Problems
  148
  - Laser Unit Failure
    148
- Troubleshooting for PCB Problems
  149
  - Main PCB Failure
    149
  - Memory Full
    149
- Troubleshooting for Document Feeding Problems
  150
  - No Document Is Fed
    150
  - Multiple Documents Are Fed
    150
  - Document Jam
    150
  - Document Becomes Wrinkled
    151
  - Document Size Is Not Detected Correctly
    152
- Troubleshooting for Image Defects
  153
  - Defect Examples
    153
  - Troubleshooting According to Image Defect
    153
- Troubleshooting for Fax Problems
  157
  - Fax Cannot be Sent
    157
  - Fax Cannot be Received
    158
  - Communication Error Occurs
    158
- Troubleshooting for Other Problems
  159
  - Cannot Print
    159
  - Cannot Update Firmware
    159
  - USB Direct Interface Errors
    159
  - Paper Low" Message Does Not Disappear
    160
Chapter 3 Disassembly/Reassembly

161
Safety Precautions

161
Packing

162
Screw Catalogue

163
Screw Torque List

164
Lubrication

167
Overview of Gears

169
Harness Routing

171
Disassembly Flow Chart

184
- Machine
  184
Disassembly Procedure

187
- Preparation
  187
- Paper Tray
  188
- Back Cover / Outer Chute
  190
- Fuser Cover
  191
- Fuser Unit
  192
- MP Cover ASSY
  195
- Front Cover ASSY
  197
- Side Cover L
  198
- Side Cover R
  199
- Adf/Document Scanner Unit
  200
- ADF Unit
  203
- Panel Unit
  216
- USB Host PCB ASSY
  224
- First Side CIS Unit, First Side CIS Flat Cable
  225
- Joint Cover ASSY
  232
- Modem PCB ASSY (Models with FAX Only)
  234
- Stack Sensor PCB ASSY (Models with USB Host on the Rear Side Only)
  236
- Main PCB ASSY / Wireless LAN PCB (Wireless LAN Models Only)
  237
- External Temperature/Humidity Sensor
  239
- Laser Unit
  240
- PF Roller Holder ASSY
  242
- Low-Voltage Power Supply PCB ASSY
  243
- Toner Amount Detection Sensor PCB ASSY (Light Emission)
  246
- Main Fan
  248
- Filter
  250
- Relay Front PCB ASSY
  251
- Registration Clutch / T1 Pickup Clutch
  252
- Main Frame L ASSY
  253
- Paper Feed Motor
  256
- Develop Joint Gear 37 / Develop Joint
  258
- Toner Amount Detection Sensor PCB ASSY (Light Reception)
  259
- MP Solenoid
  260
- Develop Clutch 51R
  261
- Internal Temperature Sensor
  262
- Fuser Drive Gear 39
  263
- Eject Motor
  265
- Back Cover/Duplex Tray Sensor
  266
- LT/TT Connector
  267
- High-Voltage Power Supply PCB ASSY
  268
- Eject Sensor PCB ASSY
  271
- MP Roller Holder ASSY / MP Separation Pad ASSY / MP Separation Pad Spring
  272
- T1 Paper Feed Sensor PCB ASSY / T1 Paper Feed Actuator / T1 Paper Feed Actuator Spring
  273
- MP Paper Empty Sensor PCB ASSY / MP Paper Empty Actuator 1 / MP Paper Empty Actuator 2
  275
- Paper Empty Sensor PCB ASSY (Models with USB Host on the Rear Side Only)
  278
- Registration Front/Rear Sensor PCB ASSY
  279
Disassembly Procedure (Lt Unit)

282
- Paper Tray
  282
- LT Roller Holder ASSY
  284
- LT Side Cover L
  285
- LT Side Cover R
  286
- LT Front Cover ASSY
  287
- LT Control PCB ASSY
  288
- LT Pickup Clutch
  289
- LT Release Clutch
  290
- LT Connector ASSY / LT Connector Upper
  293
- LT Paper Feed Sensor PCB ASSY
  294
- LT Paper Empty Sensor PCB ASSY
  297
Chapter 4 Adjusting and Updating Settings as Required after Parts Replacement

298
If You Replace the Main Pcb Assy

298
If You Replace the Low-Voltage Power Supply Pcb Assy

305
- Resetting Irregular Power Supply Counter of the Low-Voltage Power Supply PCB (Function Code: 88)
  305
If You Replace the Laser Unit

306
- Entering Adjusted Value of Laser Unit
  307
- Resetting Printed Pages Counter of the Laser Unit
  307
If You Replace the Lcd Panel Assy or Panel Pcb

308
- Adjusting Touch Panel (Function Code: 61)
  308
- Checking LCD Operation (Function Code: 12)
  308
If You Replace the Adf Unit, First Side Cis Unit, Second Side Cis Unit or Document Scanner Unit

309
- Acquiring White Level Data (Function Code: 55)
  309
- Scanning and Printing Check
  309
If You Replace the Fuser Unit

310
- Resetting Printed Pages Counter of the Fuser Unit
  310
If You Replace a Pf Kit

311
- Resetting Printed Pages Counter of a PF Kit
  311
If You Replace the Tt / Lt

312
- Installing Firmware (Main Firmware)
  313
  - Checking Firmware Version
    313
  - Installing Firmware
    314
- Adjusting Left-End and Upper-End Print Position (TT Only)
  315
Chapter 5 Service Functions

316
Maintenance Mode

316
Other Service Functions

376
- Print Communication Error List
  376
- Reset the Drum Unit Counter
  376
Chapter 6 Wiring Diagram

377
- Wiring Diagram
  377
Chapter 7 Periodical Maintenance

380
Safety Precautions

380
Periodical Replacement Parts

381
- Preparation
  381
- Fuser Unit
  382
- Laser Unit
  386
- PF Kit MP
  396
- PF Kit 1
  397
- PF Kit 2/3/4/5
  399
Appendix 1 Serial Numbering System

401
Appendix 2 Deleting User Setting Information

402
Appendix 3 Installing the Maintenance Printer Driver

403

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Brother MFC-L6702DW Laser Printer Manuals

Brother MFC-L6702DW Service Manual (408 pages)

Table of Contents

Safety Information

Chapter 1 Supplemental Specifications

General

Network Connectivity

Service Information

Supplies

Media Specifications

Fax (Only for the Models with Fax Function)

Copy

Scanner

Chapter 2 Error Indications & Troubleshooting

Introduction

Overview

Error Indications

Troubleshooting

Chapter 3 Disassembly/Reassembly

Safety Precautions

Packing

Screw Catalogue

Screw Torque List

Lubrication

Overview of Gears

Harness Routing

Disassembly Flow Chart

Disassembly Procedure

Disassembly Procedure (Lt Unit)

Chapter 4 Adjusting and Updating Settings as Required after Parts Replacement

If You Replace the Main Pcb Assy

If You Replace the Low-Voltage Power Supply Pcb Assy

If You Replace the Laser Unit

If You Replace the Lcd Panel Assy or Panel Pcb

If You Replace the Adf Unit, First Side Cis Unit, Second Side Cis Unit or Document Scanner Unit

If You Replace the Fuser Unit

If You Replace a Pf Kit

If You Replace the Tt / Lt

Chapter 5 Service Functions

Maintenance Mode

Other Service Functions

Chapter 6 Wiring Diagram

Chapter 7 Periodical Maintenance

Safety Precautions

Periodical Replacement Parts

Appendix 1 Serial Numbering System

Appendix 2 Deleting User Setting Information

Appendix 3 Installing the Maintenance Printer Driver

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