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Brother MFC-L6902DW - User Manual

Brother MFC-L6902DW
408 pages
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Confidential
Brother Laser MFC
SERVICE MANUAL
DCP-L5500D/L5500DN/L5502DN/L5600DN
DCP-L5602DN/L5650DN/L5652DN/L6600DW
MFC-8530DN/8535DN/8540DN
MFC-L5700DN/L5700DW/L5702DW/L5750DW
MFC-L5755DW/L5800DW/L5802DW/5850DW
MFC-L5900DW/L5902DW/L6700DW/L6702DW
MFC-L6750DW/L6800DW/L6900DW/L6902DW
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
December 2015
SM-FAX170
8C5J*
(1)
MODEL
LT: Lower Tray LT-5500/5505/6500/6505
TT: Tower Tray TT-4000
OPTION

Table of Contents

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Brother MFC-L6902DW Specifications

General IconGeneral
Print TechnologyLaser
Max Print Resolution1200 x 1200 dpi
Duplex PrintingYes
Display4.85" Color Touchscreen
Paper Input Capacity570 sheets
ADF Capacity80 sheets
FunctionsPrint, Copy, Scan, Fax
Processor800 MHz
Memory1 GB
Scan Resolution1200 x 1200 dpi
Fax Speed33.6 Kbps
ConnectivityUSB, Ethernet, Wi-Fi
Mobile PrintingAirPrint, Google Cloud Print, Mopria, Brother iPrint&Scan
Print SpeedUp to 52 ppm - B/W (letter A)

Summary

SAFETY INFORMATION

Definitions of Warnings, Cautions and Notes

Explains conventions used for warnings, cautions, and notes in the manual.

To use the Machine Safely

Provides essential instructions for using the machine safely during maintenance.

Hot Surface Warnings

Warns about extremely hot internal parts after use and advises waiting for cooling.

Weight Caution

Advises that the product is heavy and requires two people for lifting.

CHAPTER 1 SUPPLEMENTAL SPECIFICATIONS

3. SERVICE INFORMATION

Provides machine life, part life, MTBF, MTTR, and periodical maintenance part estimates.

CHAPTER 2 ERROR INDICATIONS & TROUBLESHOOTING

1.1 Precautions

Lists precautions to prevent secondary problems during troubleshooting, including static electricity.

1.2 Checks before Commencing Troubleshooting

Outlines essential checks of the operating environment, power supply, and consumables before repair.

3. ERROR INDICATIONS

Lists error codes, their descriptions, and corresponding page references for troubleshooting.

3.1 Error Codes

Details specific error codes, their causes, and where to find remedies.

3.2 Error Messages

Lists machine error messages displayed on the LCD and their corresponding error codes.

3.3 Communication Errors

Details communication error codes encountered during fax operations.

4. TROUBLESHOOTING

Provides systematic procedures to resolve common machine problems.

4.1 Error Cause and Remedy

Lists specific error codes with their causes and recommended remedies.

4.2 Troubleshooting for Paper Feeding Problems

Addresses issues related to paper not feeding correctly from various trays or ADF.

4.3 Troubleshooting for Image Defects

Provides examples of image defects and troubleshooting steps for each.

4.4 Troubleshooting for Software Problems

Offers solutions for issues related to computer communication and software.

4.5 Troubleshooting for Network Problems

Guides users through resolving network connectivity and printing issues.

4.6 Troubleshooting for Control Panel Problems

Addresses issues with the LCD display and control panel operability.

4.7 Troubleshooting for Toner and Drum Problems

Provides solutions for issues related to toner detection and drum errors.

4.8 Troubleshooting for Fuser Unit Problems

Details troubleshooting steps for fuser unit failures.

4.9 Troubleshooting for Laser Unit Problems

Outlines steps for resolving laser unit failures.

4.11 Troubleshooting for Document Feeding Problems

Addresses issues with document feeding, jams, and wrinkling in the ADF.

4.12 Troubleshooting for Image Defects

Details troubleshooting for various image quality issues like light prints or streaks.

CHAPTER 4 ADJUSTING AND UPDATING SETTINGS AS REQUIRED AFTER PARTS REPLACEMENT

1. IF YOU REPLACE THE MAIN PCB ASSY

Details the necessary steps after replacing the main PCB, including firmware installation and settings.

3. IF YOU REPLACE THE LASER UNIT

Covers entering adjusted values and resetting counters after replacing the laser unit.

5. IF YOU REPLACE THE ADF UNIT, FIRST SIDE CIS UNIT, SECOND SIDE CIS UNIT OR DOCUMENT SCANNER UNIT

Details acquiring white level data and performing scan/print checks after replacing these units.

6. IF YOU REPLACE THE FUSER UNIT

Explains how to reset the printed pages counter after replacing the fuser unit.

CHAPTER 5 SERVICE FUNCTIONS

1. MAINTENANCE MODE

Explains how to enter and navigate the machine's maintenance mode.

1.3.29 Display machine error code (function code: 82)

Explains how to display the latest machine error codes on the LCD.

1.3.31 Reset counters for consumable parts (function code: 88)

Covers resetting counters for consumable parts like laser, fuser, and PF kits after replacement.

CHAPTER 6 WIRING DIAGRAM

CHAPTER 7 PERIODICAL MAINTENANCE

1. SAFETY PRECAUTIONS

Outlines crucial safety precautions before performing periodical maintenance.

APPENDIX 2 DELETING USER SETTING INFORMATION

APPENDIX 3 INSTALLING THE MAINTENANCE PRINTER DRIVER

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