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MODEL
DCP-7090/7095D/7190DN/7195DW
DCP-B7500D/B7520DW/B7530DN/B7535DW
DCP-L2510D/L2511D/L2512D/L2530DW
DCP-L2531DW/L2532DW/L2535D/L2535DW
DCP-L2536D/L2537DW/L2550DN/L2550DW
DCP-L2551DN/L2551DW/L2552DN
HL-L2390DW/L2395DW
MFC-7390/7490D/7890DN/7895DW
MFC-B7700D/B7715DW/B7720DN
MFC-L2690DW/L2710DN/L2710DW/L2712DN
MFC-L2712DW/L2713DW/L2715D/L2715DW
MFC-L2716D/L2716DW/L2717DW
MFC-L2730DW/L2732DW/L2750DW/L2750DWXL
MFC-L2751DW/L2752DW/L2770DW/L2771DW
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
August 2017
SM-FAX186
8C5K*
Ver.4
Brother Laser MFC
SERVICE MANUAL
Confidential
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Table of Contents
Troubleshooting
Related Manuals for Brother DCP-2537DW
Summarization of Contents
Safety Information
Definitions of Warnings, Cautions, and Notes and Memos
Explains conventions used for warnings, cautions, and notes in the manual.
Supplemental Specifications
1. General
Provides a comparative table of model functions and specifications.
2. Network Connectivity
Details network connection types and configurations for various models.
3. Service Information
Outlines machine life, part life, MTBF, MTTR, and maintenance parts.
4. Supplies
Lists toner and drum unit specifications, including yield and shelf life.
5. Media Specifications
Specifies media types, paper input, weight, and size for ADF.
6. FAX (Only for the models with FAX function)
Details fax modem speed, transmission speed, and ITU-T group.
7. Copy
Provides copy speed and first copy out time specifications.
8. Scanner
Lists scanner resolution and scanning speed for different models.
Error Indications and Troubleshooting
1. Introduction
Introduces troubleshooting procedures and precautions for service personnel.
1.2 Checks before Commencing Troubleshooting
Lists essential checks for operating environment, power, paper, and consumables.
2. Overview
Provides cross-section drawings and operation details of printer and scanner parts.
2.3 Operation of Each Part and Location of Parts
Explains the function and location of various machine parts.
2.4 Block Diagram
Illustrates the system architecture and component interconnections.
2.5 Main Components
Shows the exploded view of major machine components.
3. Error Indications
Lists error codes, descriptions, and corresponding reference pages for troubleshooting.
3.2 Error Message
Details error messages displayed on LCD for touch panel and non-touch panel models.
3.3 Communication Errors
Lists communication error codes, causes, and reference numbers.
4. Troubleshooting
Provides remedies for various error codes and operational problems.
4.2 Troubleshooting for Paper Feeding Problems
Offers solutions for paper feeding issues like jams and misfeeds.
4.3 Troubleshooting for Image Defects
Identifies and provides solutions for various printing image defects.
4.4 Troubleshooting for Software Problems
Addresses issues related to computer connectivity and driver problems.
4.5 Troubleshooting for Network Problems
Helps resolve issues with network connection and access point connectivity.
4.6 Troubleshooting for Control Panel Problems
Guides on resolving issues with the LCD, LED, and panel operations.
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems
Provides solutions for toner and drum detection and replacement messages.
4.8 Troubleshooting for Fuser Unit Problems
Addresses issues related to fuser unit failures.
4.9 Troubleshooting for Laser Unit Problems
Covers troubleshooting steps for laser unit failures.
4.10 Troubleshooting for PCB Problems
Provides solutions for main PCB and memory-related issues.
4.11 Troubleshooting for Document Feeding Problems
Offers solutions for issues with document feeding in ADF.
4.12 Troubleshooting for Scanning Image Defect
Details troubleshooting steps for various scanning image quality issues.
4.13 Troubleshooting for FAX/Phone Problems
Provides solutions for FAX communication and reception errors.
4.14 Troubleshooting for Other Problems
Addresses miscellaneous issues like firmware updates and paper tray recognition.
Disassembly/Reassembly
1. Safety Precautions
Outlines essential safety measures to follow during disassembly and reassembly.
3. Screw Catalogue
Lists different types of screws used in the machine with their specifications.
4. Screw Torque List
Provides torque specifications for various screws during assembly.
5. Lubrication
Details lubrication points and types of oil required for maintenance.
6. Overview of Gears
Shows diagrams and names of the gear train system.
7. Harness Routing
Illustrates the routing paths of various harnesses within the machine.
8. Disassembly Flow Chart
Provides a visual flow chart for the disassembly and reassembly process.
9. Disassembly Procedure
Details step-by-step instructions for disassembling various machine components.
Adjusting and Updating Settings
1. If You Replace the Main PCB Assy
Covers firmware installation, EEPROM initialization, and laser unit adjustments.
2. If You Replace the Low-Voltage Power Supply PCB Assy
Explains how to reset the irregular power supply detection counter.
3. If You Replace the Laser Unit
Details the process of entering the adjusted value for the laser unit.
4. If You Replace the Panel Unit or Panel Control PCB
Covers touch panel adjustment and LCD operation checks.
5. If You Replace the ADF Unit, First Side CIS Unit, Second Side CIS Unit or Document Scanner Unit
Explains acquiring white level data and performing scanning checks.
Service Functions
1. Function Code
Introduces maintenance mode functions for checking, setting, and adjusting the machine.
1.2 List of Maintenance Mode Functions
Lists all available maintenance mode functions with their corresponding function codes and references.
1.3 Details of Maintenance Mode Functions
Provides detailed explanations and operating procedures for various maintenance mode functions.
1.3.5 Set Worker Switches (WSW) and Print Worker Switch Setting Data
Explains how to set and print worker switch configurations.
1.3.6 Check LCD Operation (Function Code 12)
Details the procedure to check the functionality of the LCD display.
1.3.7 Check Control Panel Key Operation (Function Code 13)
Describes how to verify the operation of control panel keys.
1.3.8 Display Software Version (Function Code 25)
Explains how to check firmware and program versions.
1.3.9 Check Sensor Operation (Function Code 32)
Guides on checking the status of various sensors and components.
1.3.10 Display LAN Connection Status (Function Code 33)
Shows how to check the wired LAN connection status.
1.3.11 Set PC Print Functions (Function Code 43)
Details how to change various print function settings.
1.3.12 Adjust Print Position Settings (Function Code 45)
Covers adjustments for USB number, print position, and fixation strength settings.
1.3.13 Adjust Printable Range for Each Speed Level (Function Code 46)
Explains how to adjust the horizontal and vertical printing positions.
1.3.14 Transfer Received Fax Data / Log Information (Function Code 53)
Describes how to transfer fax data and log information.
1.3.15 Fine-tune Scanning Position (Function Code 54)
Details the process for fine-tuning scanning start/end positions.
1.3.16 Acquire White Level Data and Set CIS Scan Area (Function Code 55)
Explains acquiring white level data and setting the CIS scan area.
1.3.17 Check Toner Cartridge (Function Code 57)
Guides on checking toner cartridge compatibility and version.
1.3.18 Adjust Touch Panel (Function Code 61)
Provides instructions for adjusting the touch panel calibration.
1.3.19 Continuous Print Test (Function Code 67)
Explains how to conduct paper feed and eject tests using print patterns.
1.3.20 Print Frame Pattern (Single-Side Printing) (Function Code 69)
Details printing a single-side frame pattern to check for flaws.
1.3.21 Print Frame Pattern (Duplex Printing) (Function Code 70)
Describes printing a duplex frame pattern to check for flaws.
1.3.22 Test Pattern (Function Code 71)
Explains printing test patterns to check roller and drum condition.
1.3.23 Configure for Country/Region and Model (Function Code 74)
Guides on customizing machine settings by country and model.
1.3.24 Print Maintenance Information (Function Code 77)
Explains how to print machine maintenance logs and consumable status.
1.3.25 Check Fan Operation (Function Code 78)
Details how to check the fan operation at different speeds.
1.3.26 Delete Fax Data (Function Code 79)
Explains how to delete fax data from the machine memory.
1.3.27 Display Machine Log Information (Function Code 80)
Guides on displaying machine log information, including error logs.
1.3.28 Display Machine Error Code (Function Code 82)
Explains how to display the latest error code on the LCD.
1.3.29 Send Communication Log Information to Telephone Line (Function Code 87)
Describes sending communication logs for remote service analysis.
1.3.30 Reset Irregular Power Supply Detection Counter (Function Code 88)
Covers resetting the irregular power supply detection counter.
1.3.31 Quit Maintenance Mode (Function Code 99)
Explains how to exit maintenance mode and restart the machine.
2. Other Service Functions
Lists additional service functions available.
2.2 Print Communication Error List
Guides on printing the communication error list.
2.3 Resetting Drum Counter
Explains how to reset the drum counter after replacement.
Wiring Diagram
1. Wiring Diagram
Provides a detailed wiring diagram showing component connections.
Periodical Maintenance
1. Periodical Replacement Parts
States that no parts require periodic replacement.
Appendix 1 Serial Numbering System
Serial Number Labels on the Printer
Explains the format and location of serial number labels on the printer.
Appendix 3 Installing the Maintenance Printer Driver
Windows 7/Windows 8/Windows 8.1/Windows 10
Provides step-by-step instructions for installing the maintenance driver on Windows.
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