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Make/Model Information:

  • Brand:   Brother
  • Models included:
    • Brother DCP-9045CDN
    • Brother MFC-9840CDW

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English
  • Number of pages:   511
  • File size:  ∼ 16.70 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   BMBR-1010

NOTE:  This list was created by program script and may not accurately represent the text from the source pages.   For full preview please click on 'Download sample':

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CHAPTER 1 TROUBLESHOOTING
1. INTRODUCTION
1.1 Precautions
1.2 Initial Check
2. ERROR CODES
2.1 Error Indication
2.2 Error Cause and Remedy
2.2.1 Recoverable Error by User Check
2.2.2 Service Call Error
3. PAPER FEEDING PROBLEMS
3.1 No Feeding
3.2 Double Feeding
3.3 Paper Jam
3.4 Dirt on Paper
3.5 Wrinkles
4. IMAGE DEFECT TROUBLESHOOTING
4.1 Image Defect Examples
4.2 Diameter of Rollers
4.3 Troubleshooting Image Defect
5. SOFTWARE SETTING PROBLEMS
6. NETWORK PROBLEMS
7. TROUBLESHOOTING OF THE COMMUNICATIONS ERRORS
8. TROUBLESHOOTING OF THE CONTROL PANEL
9. TROUBLESHOOTING OF FAX FUNCTIONS
10. OTHERS PROBLEMS
CHAPTER 2 PERIODICAL MAINTENANCE
1. CONSUMABLE PARTS
2. PERIODICAL REPLACEMENT PARTS
2.1 Periodical Replacement Parts
2.2 Procedures to Replace Periodical Replacement Parts
2.2.1 Fuser Unit & Fuser Filter Frame ASSY
2.2.2 Laser Unit
2.2.3 Paper Feeding Kit (PF Kit1, PF Kit2)
2.2.4 MP Paper Feeding Kit (PF Kit MP)
2.3 Parts Life Reset Function
CHAPTER 3 DISASSEMBLY AND ASSEMBLY
1. SAFETY PRECAUTIONS
2. PACKING
3. SCREW TORQUE LIST
4. LUBRICATION
5. OVERVIEW OF GEARS
6. HARNESS ROUTING
7. DISASSEMBLY FLOW
8. DISASSEMBLY PROCEDURE
8.1 Paper Tray
8.2 DX Feed ASSY
8.3 MP Cover ASSY/ MP Paper Guide ASSY
8.4 MP Lift Arm 2/ MP Roller Holder ASSY
8.5 Fuser Unit/ Toner Filter Frame ASSY
8.6 Back Cover Upper
8.7 Paper Eject ASSY DX
8.8 Back Cover ASSY
8.9 Paper Guide/ HV TR Top Cover
8.10 Transfer HVPS PCB Unit
ASSY/ Transfer HVPS PCB ASSY
8.12 Side Cover L ASSY
8.13 Side Plate LB
8.14 Drum Unit Fan (OPC)
8.15 Side Cover R ASSY
8.16 Paper Stopper
8.17 Driver PCB ASSY
8.18 Pull arm L, R/ Hinge Protection Cover ASSY
8.19 ADF Unit
8.20 Panel Unit
8.21 Document Scanner Unit
8.22 NCU PCB ASSY (MFC-9840CDW only)
8.23 Battery ASSY
8.24 Joint Cover ASSY
8.25 Speaker ASSY
8.26 Roller Holder ASSY
8.27 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY
8.28 Belt Cleaner Release Sensor PCB ASSY
8.29 THM/HUM Sensor Holder ASSY
8.30 Release Rack
8.31 Front Door Unit ASSY
8.32 Harness Cover MP
8.33 Front Door Sub
8.34 EL Electrode Spring L/R
8.35 Hook Cover/ Front Cover Release Button/ Button Spring/ Front Door Main
8.36 Hook Shaft/ Hook/ Hook Spring
8.37 Engine PCB ASSY
8.38 Main PCB ASSY/ Ground Plate/ Ground Spring Plate
8.39 Waste Toner Near/Full Sensor ASSY
8.40 Laser Unit/ Hook Slope
8.41 Develop Drive Motor ASSY
8.42 Drum Drive ASSY/ Drum Phase Sensor PCB ASSY 1, 2
8.43 Drive Frame Unit ASSY
8.44 Paper Feed/Belt Cleaner Motor ASSY
8.45 Develop Release Sensor PCB ASSY
8.46 Develop Press Drive L ASSY
8.47 Front Cover Interlock Switch ASSY
8.48 Toner Sensor PCB ASSY K, Y, M, C (TE/NEW)
8.49 New Toner Actuator/ New Toner Actuator Spring
8.50 Side Plate R ASSY
8.51 Drum Lock Lever L
8.52 Drum Lock Lever R
8.53 Charge HVPS PCB ASSY
8.54 Toner LED PCB ASSY
8.55 Fuser Unit Fan (FU)
8.56 LVPS Fan (PS)
8.57 Air Intake Fan (AIR)
8.58 PS PCB Unit
8.59 Belt Unit Drive Motor ASSY
9. DISASSEMBLY PROCEDURE (LT-100CL)
9.1 LT Paper Tray
9.2 LT Cover Rear
9.3 LT Cover Left
9.4 LT Cover Right
9.5 LT Relay PCB ASSY
9.6 LT Solenoid ASSY
9.7 Collar 6
9.8 Cassette Switch ASSY
9.9 LT Paper Feed Frame Unit
REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB
2. IF YOU REPLACE THE ENGINE PCB
3. IF YOU REPLACE THE FB UNIT
CHAPTER 5 SERVICE FUNCTIONS
1. MAINTENANCE MODE
1.1 How to Enter the Maintenance Mode
1.2 How to Enter the User-accessible Maintenance Mode
1.3 List of Maintenance-mode Functions
1.4 Detailed Description of Maintenance-mode Functions
1.4.1 EEPROM Parameter Initialization (Function code 01, 91)
1.4.2 Printout of Scanning Compensation Data (Function code 05)
1.4.3 Placement of Scanner Unit Position for Transportation (Function code 06)
1.4.4 ADF Performance Test (Function code 08)
1.4.5 Test Pattern (Function code 09)
1.4.6 Worker Switch (WSW) Setting and Printout
1.4.7 Operational Check of LCD (Function code 12)
1.4.8 Operational Check of Control Panel Button (Function code 13)
1.4.9 ROM Version Check (Function code 25)
1.4.10 Drum Unit Cleaning (Function code 31)
1.4.11 Operational Check of Sensors (Function code 32)
(Function code 45)
1.4.13 EEPROM Customizing (User-accessible) (Function code 52)
1.4.14 Received Data Transfer Function (Function code 53) (MFC-9840CDW only)
1.4.15 Fine Adjustment of Scan Start/End Positions (Function code 54)
(Function code 55)
1.4.17 Paper Feeding and Ejecting Test (Function code 67)
1.4.18 Sensitivity Adjustment of Density Sensor (Function code 72) (Donít use)
1.4.19 EEPROM Customizing (Function code 74)
1.4.20 Sensitivity Adjustment of Registration-mark Sensor (Function code 75)
1.4.21 Operational Check of Fans (Function code 78)
1.4.22 Display of the Machineís Log Information (Function code 80)
1.4.23 Error Code Indication (Function code 82)
1.4.24 Developing Bias Voltage Correction (Function code 83)
1.4.25 Output of Transmission Log to the Telephone Line (Function code 87)
1.4.26 Exit from the Maintenance Mode (Function code 99)
2. OTHER SERVICE FUNCTIONS
2.1 Resetting the Periodical Replacement Parts Life
2.1.1 Resetting the Life Counter of the Belt Unit
2.1.2 Resetting the Life Counter of the Fuser Unit
2.1.3 Resetting the Life Counter of the Drum Unit
2.1.4 Resetting the Life counter of the Paper Feeding Kit
2.1.5 Resetting the Life Counter of the MP Paper Feeding Kit
2.1.6 Resetting the Life Counter of the Laser Unit
2.2 Develop Roller/ Developing Bias Voltage Counter Reset Function
2.3 Drum Unit Cleaning Mode
2.4 Fixing Motor Speed Adjustment Mode
CHAPTER 6 CIRCUIT DIAGRAMS, WIRING DIAGRAM
APPENDIX 1 WORKER SWITCH SETTINGS (WSW)
APPENDIX 2 DELETION OF PERSONAL INFORMATION
APPENDIX 3 SERIAL NUMBERING SYSTEM
APPENDIX 4 SCREW CATALOGUE
APPENDIX 5 REFERENCES


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