Brother MFC-7390/7490D/7890DN/7895DW/B7520DW MFC-2751DW/L2752DW/L2770DW/L2771DW Service Manual


This Service Manual cover models:

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

Accurate, clear and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
To see what contain, please read table of contents:

SAFETY INFORMATION

CHAPTER 1) SUPPLEMENTAL SPECIFICATIONS
1. GENERAL
2. NETWORK CONNECTIVITY
3. SERVICE INFORMATION
4. SUPPLIES
5. MEDIA SPECIFICATIONS
6. FAX (ONLY FOR THE MODELS WITH FAX FUNCTION)
7. COPY
8. SCANNER

CHAPTER 2) ERROR INDICATIONS AND TROUBLESHOOTING
1. INTRODUCTION
1.1 Precautions
1.2 Checks before Commencing Troubleshooting
2. OVERVIEW
2.1 Cross-section Drawing
2.1.1 Printer part
2.1.2 Scanner part
2.2 Paper Feeding
2.2.1 Printer part
2.2.2 Scanner part
2.3 Operation of Each Part and Location of Parts
2.4 Block Diagram
2.5 Main Components
3. ERROR INDICATIONS
3.1 Error Codes
3.2 Error Message
3.2.1 LCD models
3.2.2 Touch panel models
3.3 Communication Errors
4. TROUBLESHOOTING
4.1 Error Cause and Remedy
4.2 Troubleshooting for Paper Feeding Problems
4.2.1 No paper feeding from paper tray
4.2.2 No paper feeding from MP tray
4.2.3 No paper feeding from manual feed slot
4.2.4 Multiple sheets of paper are fed
4.2.5 Paper becomes wrinkled
4.2.6 Paper is fed at an angle
4.2.7 Paper curls
4.2.8 Unable to perform 2-sided printing
4.2.9 Paper jam
4.3 Troubleshooting for Image Defects
4.3.1 Image defect examples
4.3.2 Troubleshooting image defect
4.4 Troubleshooting for Software Problems
4.4.1 Unable to receive data
4.5 Troubleshooting for Network Problems
4.5.1 Cannot make a print through network connection
4.5.2 Cannot connect to access point
4.6 Troubleshooting for Control Panel Problems
4.6.1 Nothing is displayed on the LCD
4.6.2 Nothing is displayed on the LED
4.6.3 Unable to perform panel operation
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems
4.7.1 New toner not detected
4.7.2 Toner cartridge not detected
4.7.3 Toner replacement message displayed on LCD is not cleared
4.7.4 Drum error
4.7.5 Drum replacement message displayed on LCD is not cleared
4.8 Troubleshooting for Fuser Unit Problems
4.8.1 Fuser unit failure
4.9 Troubleshooting for Laser Unit Problems
4.9.1 Laser unit failure
4.10 Troubleshooting for PCB Problems
4.10.1 Main PCB failure
4.10.2 Full memory
4.11 Troubleshooting for Document Feeding Problems
4.11.1 No document is fed
4.11.2 Multiple documents are fed
4.11.3 Document jam
4.11.4 Document becomes wrinkled
4.11.5 Document size is not detected correctly
4.12 Troubleshooting for Scanning Image Defect
4.12.1 Defect examples
4.12.2 Troubleshooting according to image defect
4.13 Troubleshooting for FAX/Phone Problems
4.13.1 Fax cannot be sent
4.13.2 Fax cannot be received
4.13.3 Communication error occurs
4.13.4 Receive buffer full during receiving into memory
4.14 Troubleshooting for Other Problems
4.14.1 Cannot make print
4.14.2 Cannot update firmware
4.14.3 “Paper Low” message does not disappear
4.14.4 Message indicating that the report is full does not disappear
4.14.5 Paper tray cannot be recognized

CHAPTER 3) DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS
2. PACKING
3. SCREW CATALOGUE
4. SCREW TORQUE LIST
5. LUBRICATION
6. OVERVIEW OF GEARS
7. HARNESS ROUTING
8. DISASSEMBLY FLOW CHART
9. DISASSEMBLY PROCEDURE
9.1 Preparation
9.2 Cord hook
9.3 Back cover
9.4 Outer chute ASSY
9.5 Front cover ASSY / Support flap
9.6 Side cover R
9.7 Fuser cover
9.8 Inner chute ASSY
9.9 Side cover L / Speaker harness ASSY / Handset holder ASSY (For models with Handset)
9.10 Document scanner unit
9.11 ADF unit (For models with ADF)
9.11.1 ADF unit
9.11.2 ADF cover ASSY / Document stopper
9.11.3 Document sub tray
9.11.4 Document separate roller ASSY
9.11.5 ADF separation holder ASSY
9.11.6 Second side CIS unit / Second side CIS flat cable (Only for models with duplex scanning)
9.12 Document cover ASSY (For models without ADF)
9.13 Panel unit (For Touch panel models)
9.13.1 Panel unit
9.13.2 Panel PCB ASSY / NFC PCB ASSY / LCD
9.13.3 Touch panel ASSY
9.14 Panel unit (For Non-touch panel models)
9.14.1 Panel unit
9.14.2 Panel PCB ASSY
9.14.3 LCD
9.15 Panel flat cable / First side CIS unit / First side CIS flat cable
9.16 Modem flat cable / Modem PCB ASSY
9.17 Joint cover ASSY
9.18 Fuser unit
9.19 Low-voltage power supply PCB ASSY
9.20 New toner sensor PCB ASSY
9.21 HVPS flat cable / High-voltage power supply PCB ASSY
9.22 Fan
9.23 Toner box relay PCB ASSY (For models with toner box)/ MP relay PCB ASSY (For MP models) /
Toner box new PCB ASSY (For models with toner box)
9.24 Laser unit flat cable / Laser unit
9.25 Filter
9.26 Wireless LAN PCB (Only for wireless network models)
9.27 Roller holder ASSY
9.28 Main PCB ASSY
9.29 T1 clutch / Registration clutch
9.30 Frame L unit
9.31 Paper feed motor / Paper feed motor flat cable
9.32 Fuser gear 64R/36R
9.33 Toner sensor PCB ASSY (Only for models with Toner box)
9.34 Front cover sensor
9.35 Eject sensor PCB ASSY
9.36 Registration front/rear actuator holder ASSY
9.37 Paper feed roller ASSY / Paper feed sensor PCB ASSY

CHAPTER 4) ADJUSTING AND UPDATING SETTINGS AS REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY
1.1 Installing Firmware (Sub firmware and main firmware)
1.1.1 Checking firmware version
1.1.2 Installing firmware
1.2 Initializing the EEPROM of the Main PCB ASSY(Function code 01)
1.3 Setting by Spec, Setting Serial Number and Entering Adjusted Value of Laser Unit
1.4 Adjusting Touch Panel (Function code 61)(Touch panel models only)
1.5 Acquiring White Level Data (Function code 55)
2. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB ASSY
2.1 Reset Irregular Power Supply Detection Counter of the Low-voltage Power Supply PCB (Function code 88)
3. IF YOU REPLACE THE LASER UNIT
3.1 Entering Adjusted Value of Laser Unit
4. IF YOU REPLACE THE PANEL UNIT OR PANEL CONTROL PCB
4.1 Adjusting Touch Panel (Function code 61) (Touch panel models only)
4.2 Checking LCD Operation (Function code 12)
5. IF YOU REPLACE THE ADF UNIT, FIRST SIDE CIS UNIT, SECOND SIDE CIS UNIT OR DOCUMENT SCANNER UNIT
5.1 Acquiring White Level Data (Function code 55)
5.2 Scanning and Printing Check

CHAPTER 5) SERVICE FUNCTIONS
1. FUNCTION CODE
1.1 How to Enter Maintenance Mode
1.1.1 Method of entering maintenance mode for service personnel
1.1.2 Method of entering end-user accessible maintenance mode
1.2 List of Maintenance Mode Functions
1.3 Details of Maintenance Mode Functions
1.3.1 Initialize EEPROM parameters (Function code 01, 91)
1.3.2 Transition to shipping state (Function code 03)
1.3.3 ADF performance test (Function code 08)
1.3.4 Print quality test pattern (Function code 09)
1.3.5 Set worker switches (WSW) and print worker switch setting data (Function code 10, 11)
1.3.6 Check LCD operation (Function code 12)
1.3.7 Check control panel key operation (Function code 13)
1.3.8 Display software version (Function code 25)
1.3.9 Check sensor operation (Function code 32)
1.3.10 Display LAN connection status (Function code 33)
1.3.11 Set PC print functions (Function code 43)
1.3.12 Change USB No. return value / Adjust left-end print position / Adjust upper-end print position /
Change ON/OFF setting for lower case compensation /
Change ON/OFF setting for fixation strength improvement
(Function code 45)
1.3.13 Adjust printable range for each speed level (Function code 46)
1.3.14 Transfer received fax data / log information (fax models only)
(Function code 53)
1.3.15 Fine-tune scanning position (Function code 54)
1.3.16 Acquire white level data and set CIS scan area (Function code 55)
1.3.17 Check toner cartridge (Models with cartridge sensor only) (Function code 57)
1.3.18 Adjust touch panel (Function code 61)
1.3.19 Continuous print test (Function code 67)
1.3.20 Print frame pattern (single-side printing) (Function code 69)
1.3.21 Print frame pattern (duplex printing) (Function code 70)
1.3.22 Test pattern (Function code 71)
1.3.23 Configure for country/region and model (Function code 74)
1.3.24 Print maintenance information (Function code 77)
1.3.25 Check fan operation (Function code 78)
1.3.26 Delete fax data (Function code 79)
1.3.27 Display machine log information (Function code 80)
1.3.28 Display machine error code (Function code 82)
1.3.29 Send communication log information to telephone line (Function code 87)
1.3.30 Reset irregular power supply detection counter of
low-voltage power supply PCB (Function code 88)
1.3.31 Quit maintenance mode (Function code 99)
2. OTHER SERVICE FUNCTIONS
2.1 Drum Cleaning
2.2 Print Communication Error List
2.3 Resetting Drum Counter

CHAPTER 6) WIRING DIAGRAM
1. WIRING DIAGRAM
CHAPTER 7 PERIODICAL MAINTENANCE
1. PERIODICAL REPLACEMENT PARTS

APPENDIX 1 SERIAL NUMBERING SYSTEM
APPENDIX 2 DELETING USER SETTING INFORMATION
APPENDIX 3 INSTALLING THE MAINTENANCE PRINTER DRIVER

Brother DCP7090 7095D 7190DN 7195DW DCPB7500D B7520DW B7530DN B7535DW DCPL2510D L2511D L2512D L2530DW DCPL2531DW L2532DW L2535D L2535DW DCPL2536D L2537DW L2550DN L2550DW DCPL2551DN L2551DW L2552DN HLL2390DW L2395DW MFC7390 7490D 7890DN 7895DW MFCB7700D B7715DW B7720DN MFCL2690DW L2710DN L2710DW L2712DN MFCL2712DW L2713DW L2715D L2715DW MFCL2716D L2716DW L2717DW MFCL2730DW L2732DW L2750DW L2750DWXL MFCL2751DW L2752DW L2770DW L2771DW 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