Brother Color-Laser-MFC L8400CDN L8450CDW L8600CDW L8850CDW L9550CDW Service Manual
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- How to repair L8400CDN L8450CDW L8600CDW L8850CDW L9550CDW Printer?
- product description, operating principles,troubleshooting, disassembly and assembly,adjustment, maintenance, connector summary.
CONTENTS
REGULATION................................................................................... I
SAFETY INFORMATION...............................................................VII
1.CHAPTER 1 SUPPLEMENTAL SPECIFICATIONS
1.1 General....................................................................................................................... 1-1
1.2 Network Connectivity.................................................................................................. 1-3
1.3 Service Information..................................................................................................... 1-4
1.4 Supplies...................................................................................................................... 1-5
1.5 Paper .......................................................................................................................... 1-7
1.5.1 Media specifications for ADF............................................................................. 1-7
1.6 Telephone ................................................................................................................... 1-7
1.7 FAX (Only for the models with FAX function) ............................................................. 1-8
1.8 Copy ........................................................................................................................... 1-9
1.9 Scanner ....................................................................................................................1-10
CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING
1. INTRODUCTION ........................................................................................2-1
1.1 Precautions................................................................................................................. 2-1
1.2 Checks before Commencing Troubleshooting............................................................ 2-3
2. OVERVIEW.................................................................................................2-5
2.1 Cross-section Drawing ............................................................................................... 2-5
2.1.1 Printer part......................................................................................................... 2-5
2.1.2 Scanning part .................................................................................................... 2-6
2.2 Paper Feeding ............................................................................................................ 2-7
2.2.1 Printer part......................................................................................................... 2-7
2.2.2 Scanning part .................................................................................................... 2-8
2.3 Operation of Each Part ............................................................................................... 2-9
2.4 Block Diagram .......................................................................................................... 2-11
2.5 Main Components..................................................................................................... 2-12
3. ERROR INDICATIONS.............................................................................2-13
3.1 Error Codes .............................................................................................................. 2-13
3.2 Error Message .......................................................................................................... 2-24
Confidential3.3 Communications Error Code .................................................................................... 2-35
4. TROUBLESHOOTING .............................................................................2-39
4.1 Error Cause and Remedy......................................................................................... 2-39
4.2 Troubleshooting for Paper Feeding Problems .......................................................... 2-87
4.2.1 No paper feeding from paper tray 1................................................................. 2-87
4.2.2 No paper feeding from T2 paper tray unit........................................................ 2-88
4.2.3 No paper feeding from MP tray ....................................................................... 2-89
4.2.4 Multiple sheets of paper are fed ...................................................................... 2-90
4.2.5 Paper becomes wrinkled ................................................................................. 2-90
4.2.6 Paper is fed at an angle................................................................................... 2-90
4.2.7 Paper curls ...................................................................................................... 2-91
4.2.8 Unable to perform 2-sided printing .................................................................. 2-91
4.2.9 Paper jam ........................................................................................................ 2-92
4.3 Troubleshooting for Image Defects........................................................................... 2-96
4.3.1 Image defect examples ................................................................................... 2-96
4.3.2 Troubleshooting image defect ......................................................................... 2-97
4.4 Troubleshooting for Software Problems ................................................................. 2-114
4.4.1 Unable to receive data................................................................................... 2-114
4.5 Troubleshooting for Network Problems .................................................................. 2-115
4.5.1 Cannot make a print through network connection ......................................... 2-115
4.6 Troubleshooting for Control Panel Problems.......................................................... 2-116
4.6.1 Nothing is displayed on the LCD ................................................................... 2-116
4.6.2 Unable to perform panel operation ................................................................ 2-117
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems............................... 2-118
4.7.1 New toner not detected ................................................................................. 2-118
4.7.2 Toner cartridge not detected.......................................................................... 2-118
4.7.3 Toner replacement message displayed on LCD is not cleared ..................... 2-118
4.7.4 Drum error ..................................................................................................... 2-119
4.7.5 Drum replacement message displayed on LCD is not cleared...................... 2-119
4.8 Troubleshooting for Fuser Unit Problems ............................................................... 2-120
4.8.1 Fuser unit failure............................................................................................ 2-120
4.9 Troubleshooting for Laser Unit Problems ............................................................... 2-120
4.9.1 Laser unit failure ............................................................................................ 2-120
4.10 Troubleshooting for PCB Problems ...................................................................... 2-121
4.10.1 Main PCB failure.......................................................................................... 2-121
4.10.2 Full memory................................................................................................. 2-121
4.10.3 Problem of print restriction/ID authentication............................................... 2-121
4.11 Document Feeding Problems ............................................................................... 2-122
Confidential4.11.1 No feeding ................................................................................................... 2-122
4.11.2 Double feeding............................................................................................. 2-122
4.11.3 Paper jam .................................................................................................... 2-123
4.11.4 Document becomes wrinkled....................................................................... 2-125
4.11.5 Document size cannot be correctly detected............................................... 2-125
4.12 Scanning Image Defect Troubleshooting.............................................................. 2-126
4.12.1 Image defect examples ............................................................................... 2-126
4.12.2 Troubleshooting image defect ..................................................................... 2-126
4.13 Troubleshooting of FAX Functions........................................................................ 2-130
4.13.1 FAX can't send it.......................................................................................... 2-130
4.13.2 FAX cannot be received .............................................................................. 2-131
4.13.3 No bell ring .................................................................................................. 2-131
4.13.4 A communication error occurs..................................................................... 2-131
4.13.5 Receive buffer full during receiving into memory......................................... 2-132
4.14 Troubleshooting for Other Problems..................................................................... 2-132
4.14.1 Cannot make print ....................................................................................... 2-132
4.14.2 Problem of USB direct interface .................................................................. 2-132
4.14.3 Cannot update firmware .............................................................................. 2-133
4.14.4 The machine is not turned ON..................................................................... 2-133
CHAPTER 3 DISASSEMBLY AND ASSEMBLY
1. SAFETY PRECAUTIONS ..........................................................................3-1
2. PACKING....................................................................................................3-2
3. SCREW CATALOGUE ...............................................................................3-3
4. SCREW TORQUE LIST .............................................................................3-4
5. LUBRICATION ...........................................................................................3-7
6. OVERVIEW OF GEARS.............................................................................3-9
7. HARNESS ROUTING...............................................................................3-10
8. DISASSEMBLY FLOW.............................................................................3-26
9. DISASSEMBLY PROCEDURE ................................................................3-28
9.1 Lift Gear 46/Gear Z19M10........................................................................................ 3-29
9.2 Back Cover/Back Cover Stopper Arm L/Back Cover Stopper Arm R ....................... 3-30
9.3 Fuser Cover ASSY ................................................................................................... 3-33
9.4 Cleaner Pinch Roller S ASSY................................................................................... 3-35
9.5 Fuser Unit .................................................................................................................3-37
Confidential9.6 Cord Hook ................................................................................................................ 3-40
9.7 Side Cover L............................................................................................................. 3-41
9.8 Side Cover R ............................................................................................................ 3-45
9.9 Duplex Tray .............................................................................................................. 3-49
9.10 MP Cover ASSY/MP Paper Guide ASSY............................................................... 3-50
9.11 MP Link L/MP Link R .............................................................................................. 3-53
9.12 Front Cover............................................................................................................. 3-54
9.13 Front Cover Release Button/Front Cover Release Button Spring .......................... 3-56
9.14 Support Flap ........................................................................................................... 3-58
9.15 Pull Arm L/Pull Arm R (A4 Model Only).................................................................. 3-59
9.16 Back Cover Upper (Legal Model Only)................................................................... 3-60
9.17 ADF Unit/Hinge ASSY L/Hinge R/Hinge R Support ............................................... 3-61
9.18 ADF Document Output Support Flap...................................................................... 3-73
9.19 ADF Document Support ......................................................................................... 3-73
9.20 ADF Cover ASSY ................................................................................................... 3-74
9.21 Gear Cover ............................................................................................................. 3-75
9.22 Separation Roller.................................................................................................... 3-77
9.23 ADF Separation Pad Holder (A4 Model Only) ........................................................ 3-79
9.24 ADF Separation Pad/Separation Support Film (Legal Model Only)........................ 3-81
9.25 ADF Separation Spring Holder (Legal Model Only)................................................ 3-84
9.26 CIS Spacer ............................................................................................................. 3-86
9.27 Second Side CIS Flat Cable/Second Side CIS Unit ............................................... 3-88
9.28 ADF Cover/Document Detection Sensor PCB ASSY/
First Side Document Scanning Position Sensor PCB ASSY/
Second Side Document Scanning Position Sensor PCB ASSY
(Duplex Scanning Model Only) ............................................................................... 3-95
9.29 Document Feed Roller ASSY 2 ............................................................................ 3-100
9.30 Eject Film.............................................................................................................. 3-102
9.31 ADF Motor ............................................................................................................ 3-104
9.32 Document Cover ASSY........................................................................................ 3-107
9.33 Control Panel ASSY/Document Scanner Unit ...................................................... 3-108
9.34 Panel PCB Unit..................................................................................................... 3-110
9.35 LCD ...................................................................................................................... 3-113
9.36 Touch Panel ASSY ............................................................................................... 3-114
9.37 NFC PCB ASSY (Model with NFC only)/Panel Cover ASSY ............................... 3-115
9.38 First Side CIS Unit/First Side CIS Flat Cable ....................................................... 3-116
9.39 Joint Film (A4 Model Only) ................................................................................... 3-121
9.40 Joint Film2 (Single-side Scanning Model Only).................................................... 3-122
9.41 Joint Cover Top..................................................................................................... 3-123
9.42 Modem PCB ASSY/Modem Flat Cable ................................................................ 3-128
Confidential9.43 Back Cover Upper (A4 Model Only) ..................................................................... 3-133
9.44 Joint Cover USB ASSY ........................................................................................ 3-134
9.45 Wireless LAN PCB ............................................................................................... 3-136
9.46 Main PCB ASSY................................................................................................... 3-137
9.47 Laser Unit Flat Cable/Laser Unit .......................................................................... 3-139
9.48 Front Cover Sensor .............................................................................................. 3-143
9.49 Process Drive Unit/Fuser Drive Gear Z25 ............................................................ 3-144
9.50 Main Drive Unit ..................................................................................................... 3-150
9.51 Develop Release Drive Unit ................................................................................. 3-151
9.52 Develop Release Sensor PCB ASSY................................................................... 3-152
9.53 Toner/New Sensor PCB ASSY ............................................................................. 3-153
9.54 Fuser Fan ............................................................................................................. 3-154
9.55 Paper Eject ASSY ................................................................................................ 3-155
9.56 Toner Filter ASSY ................................................................................................. 3-156
9.57 Paper Eject Origin Sensor .................................................................................... 3-157
9.58 Back Cover Sensor ASSY .................................................................................... 3-159
9.59 Eject Sensor PCB ASSY ...................................................................................... 3-160
9.60 Registration Mark Sensor Unit.............................................................................. 3-161
9.61 Power Fan ............................................................................................................ 3-162
9.62 Low-voltage Power Supply PCB Unit ................................................................... 3-163
9.63 MP Paper Empty Actuator A ASSY/MP Paper Empty Actuator B ........................ 3-166
9.64 MP Paper Empty/Registration Front Sensor PCB ASSY ..................................... 3-172
9.65 Paper Feed Unit ................................................................................................... 3-174
9.66 Registration Front/Rear Sensor PCB ASSY......................................................... 3-177
9.67 T1 Paper Feed Sensor PCB ASSY ...................................................................... 3-178
9.68 High-voltage Power Supply PCB ASSY ............................................................... 3-181
9.69 Air Duct Film ......................................................................................................... 3-184
9.70 Blower................................................................................................................... 3-185
10. DISASSEMBLY PROCEDURE (LT-320CL/LT-325CL)........................3-186
10.1 T2 Paper Tray Unit ............................................................................................... 3-186
10.2 T2 Cover Rear ...................................................................................................... 3-187
10.3 T2 Cover Left........................................................................................................ 3-188
10.4 T2 Cover Right ..................................................................................................... 3-189
10.5 T2 Relay PCB ASSY ............................................................................................ 3-190
10.6 T2 Paper Feed Frame Unit/T2 Edge Actuator...................................................... 3-191
ConfidentialCHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS,
REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY................................................4-1
1.1 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware,
and High-voltage Firmware) ....................................................................................... 4-2
1.1.1 Checking firmware version ................................................................................ 4-2
1.1.2 Installing the firmware........................................................................................ 4-3
1.2 Initializing the EEPROM of the Main PCB ASSY (Function code 01) ........................ 4-4
1.3 Setting the Serial Number (Function code 80) ........................................................... 4-5
1.4 Restore Machine Information (Function code 41) ...................................................... 4-5
1.5 Setting by Country (Function code 74) ....................................................................... 4-5
1.6 Motor Reset (Function code 57) ................................................................................. 4-5
1.7 Continuous Adjustments of Density and Registration Sensor (Function code 73) ..... 4-6
1.8 Acquisition of White Level Data (Function code 55)................................................... 4-6
1.9 Adjustment of Touch Panel (Function code 61).......................................................... 4-6
2. IF YOU REPLACE THE REGISTRATION MARK SENSOR UNIT ............4-7
2.1 Continuous Adjustments of Density and Registration Sensor (Function code 73) ..... 4-7
3. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB UNIT ..4-8
3.1 Reset of Irregular Power Supply Detection Counter of
Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88)) ...... 4-8
4. IF YOU REPLACE THE PROCESS DRIVE UNIT......................................4-9
4.1 Motor Reset (Function code 57) ................................................................................. 4-9
5. IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY
PCB ASSY................................................................................................4-10
5.1 Installing the Firmware.............................................................................................. 4-10
5.1.1 Checking firmware version .............................................................................. 4-10
5.1.2 Installing the firmware...................................................................................... 4-10
5.2 Continuous Adjustments of Density and Registration Sensor
(Function code 73).................................................................................................... 4-10
6. IF YOU REPLACE THE LCD PANEL ASSY OR
PANEL CONTROL PCB ASSY................................................................4-11
6.1 Installing the Firmware.............................................................................................. 4-11
6.1.1 Checking firmware version .............................................................................. 4-11
6.1.2 Installing the firmware...................................................................................... 4-11
6.2 Adjustment of Touch Panel (Function code 61)........................................................ 4-11
6.3 Operational Check of LCD (Function code 12)......................................................... 4-11
Confidential7. IF YOU REPLACE THE LASER UNIT.....................................................4-12
7.1 Continuous Adjustments of Density and Registration Sensor
(Function code 73).................................................................................................... 4-12
7.2 Counter Reset of Laser Unit (Reset Counters for Parts (Function code 88)) ........... 4-12
8. IF YOU REPLACE THE FIRST SIDE CIS UNIT,
DOCUMENT SCANNER UNIT.................................................................4-13
8.1 Acquisition of White Level Data (Function code 55)................................................. 4-13
8.2 Scanning and Printing Check ................................................................................... 4-13
9. IF YOU REPLACE THE ADF UNIT, SECOND SIDE CIS UNIT...............4-14
9.1 Acquisition of White Level Data (Function code 55)
(Duplex Scanning Model Only)................................................................................. 4-14
9.2 Scanning and Printing Check ................................................................................... 4-14
10. IF YOU REPLACE THE FUSER UNIT/PF KIT 1, 2, AND MP ...............4-15
10.1 Counter Reset of Fuser Unit or PF Kit 1, 2, and MP
(Reset Counters for Parts (Function code 88))....................................................... 4-15
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE..............................................................................5-1
1.1 How to Enter the Maintenance Mode ......................................................................... 5-1
1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel.............. 5-1
1.1.2 How to Enter the End User-accessible Maintenance Mode .............................. 5-2
1.2 List of Maintenance-mode Functions.......................................................................... 5-3
1.3 Detailed Description of Maintenance-mode Functions ............................................... 5-5
1.3.1 EEPROM parameter initialization (Function code 01, 91) ................................. 5-5
1.3.2 Printout of scanning compensation data (Function code 05)............................. 5-6
1.3.3 ADF performance test (Function code 08) ........................................................ 5-8
1.3.4 Monochrome image quality test pattern (Function code 09).............................. 5-9
1.3.5 Worker switch (WSW) setting and printout (Function code 10, 11) ................. 5-10
1.3.6 Operational check of LCD (Function code 12) ................................................ 5-14
1.3.7 Operational check of control panel key (Function code 13)............................. 5-15
1.3.8 Software version check (Function code 25)..................................................... 5-16
1.3.9 “One Push Demo” setting (Function code 28) ................................................. 5-17
1.3.10 Operational check of sensors (Function code 32) ......................................... 5-18
1.3.11 LAN connection status display (Function code 33)........................................ 5-22
1.3.12 EEPROM Dump Print (Function code 40) ..................................................... 5-23
1.3.13 Backup of machine information (Function code 41) ...................................... 5-24
1.3.14 PC print function setting (Function code 43) ................................................. 5-26
Confidential1.3.15 Changing return value of USB No./Switching Dither Pattern/
Switching of ON/OFF of DirectPrint Color mode-Improve Gray Color/
Switching of timing to execute Auto Registration/
Adjusting left-end print start position on second side in duplex printing/
Change of the transfer current setting/Change of ghost reduction setting
(Function code 45)......................................................................................... 5-29
1.3.16 Set country/language (Function code 52)...................................................... 5-33
1.3.17 Transfer of received fax data and log information (Function code 53) .......... 5-34
1.3.18 Fine adjustment of scan positions (Function code 54) .................................. 5-36
1.3.19 Acquisition of white level data and setting of CIS scanning area
(Function code 55)......................................................................................... 5-37
1.3.20 Motor reset (Function code 57) ..................................................................... 5-38
1.3.21 Adjustment of touch panel (Function code 61) .............................................. 5-39
1.3.22 Adjustment of color registration
(Adjustment of inter-color position alignment) (Function code 66) ................ 5-40
1.3.23 Continuous print test (Function code 67)....................................................... 5-44
1.3.24 Laser unit test pattern print (Function code 68)............................................. 5-48
1.3.25 Frame pattern print (One-sided) (Function code 69) ..................................... 5-49
1.3.26 Frame pattern print (Two-sided) (Function code 70) ..................................... 5-50
1.3.27 Color test pattern (Function code 71) ............................................................ 5-51
1.3.28 Sensitivity adjustment of density sensor (Function code 72)......................... 5-54
1.3.29 Continuous adjustments of density and registration sensor
(Function code 73)......................................................................................... 5-55
1.3.30 Setting by country (Function code 74)........................................................... 5-56
1.3.31 Printout of maintenance information (Function code 77)............................... 5-59
1.3.32 Operational check of fans (Function code 78)............................................... 5-61
1.3.33 Display of device log information (Function code 80).................................... 5-62
1.3.34 Display of device error codes (Function code 82) ......................................... 5-66
1.3.35 Developing bias voltage correction (Function code 83)................................. 5-67
1.3.36 Sending of communication log information to telephone line
(Function code 87)......................................................................................... 5-68
1.3.37 Reset counters for parts (Function code 88) ................................................. 5-69
1.3.38 Exit from the maintenance mode (Function code 99).................................... 5-69
2. OTHER SERVICE FUNCTIONS...............................................................5-70
2.1 Toner Manual Reset Function................................................................................... 5-70
2.2 Printing of Communication List................................................................................. 5-71
2.3 Drum Cleaning.......................................................................................................... 5-72
2.4 Counter Reset of Consumable Parts (Drum unit/Belt unit)....................................... 5-73
ConfidentialCHAPTER 6 WIRING DIAGRAM
1. WIRING DIAGRAM ....................................................................................6-1
CHAPTER 7 PERIODICAL MAINTENANCE
1. SAFETY PRECAUTIONS ..........................................................................7-1
2. PERIODICAL REPLACEMENT PARTS ....................................................7-2
2.1 Procedures to Replace Periodical Replacement Parts............................................... 7-2
2.1.1 Fuser unit........................................................................................................... 7-3
2.1.2 Laser unit......................................................................................................... 7-12
2.1.3 PF kit 1 ............................................................................................................ 7-42
2.1.4 PF kit 2 ............................................................................................................ 7-45
2.1.5 PF kit MP ......................................................................................................... 7-48
APPENDIX 1 SERIAL NUMBERING SYSTEM
APPENDIX 2 DELETION OF USER SETTING INFORMATION
APPENDIX 3 INSTALLING THE MAINTENANCE PRINTER DRIVER
| BRAND | EPSON |
|---|---|
| TYPES | Service_Manual |
| SIZE | 30.4M |
| PAGES | 520 |
| FORMAT | |
| LANGUAGE | English |
| QUALITY | High resolution |
| VERSION | 1 |
| DOCDATE | 2014-01-03 00:00:00 |
| APPLIESTO | Brother Color-Laser-MFC L8400CDN Brother Color-Laser-MFC L8450CDW Brother Color-Laser-MFC L8600CDW Brother Color-Laser-MFC L8850CDW Brother Color-Laser-MFC L9550CDW |
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