Brother HL-4040CN, HL-4050CDN, HL-4070CDW, Service Manual

Service Manual Brother HL4040CN, HL4050CDN, HL4070CDW;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Brother.
You can print, zoom or read any diagram, picture or page from this Service Manual. Every chapter on this manual is fully detailed and contain all theĀ  simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of Brother HL4040CN, HL4050CDN, HL4070CDW photocopier. You can find easily everything what do you need.
To see what contain, please read table of contents:

REGULATION
SAFETY INFORMATION

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. 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
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 AC Cord
8.2 Toner Cartridge
8.3 Drum Unit
8.4 Belt Unit
8.5 Waste Toner Box
8.6 Paper Tray
8.7 DX Feed ASSY (HL-4050CDN/ 4070CDW only)
8.8 MP Cover ASSY/ MP Paper Guide ASSY
8.9 MP Lift Arm 2/ MP Roller Holder ASSY
8.10 Fuser Unit/ Toner Filter Frame ASSY
8.11 Back Cover Upper
8.12 Paper Eject ASSY DX/SX
8.13 Back Cover ASSY
8.14 Paper Guide DX/ HV TR Top Cover
8.15 Transfer HVPS PCB Unit
8.16 Registration-mark Sensor PCB ASSY 1, 2/ Density Sensor/ Registration Relay PCB ASSY/ Transfer HVPS PCB ASSY
8.17 Side Cover L ASSY
8.18 Side Plate LB
8.19 Drum Unit Fan (OPC)
8.20 Side Cover R ASSY
8.21 Roller Holder ASSY
8.22 Paper Feed Frame Unit/ T1 PE/Edge Sensor PCB ASSY
8.23 Belt Cleaner Release Sensor PCB ASSY
8.24 THM/HUM Sensor Holder ASSY
8.25 Release Rack
8.26 Front Door Unit ASSY
8.27 Harness Cover MP
8.28 Front Door Sub
8.29 EL Electrode Spring L/R
8.30 Hook Cover/ Front Cover Release Button/ Button Spring/ Front Door Main
8.31 Hook Shaft/ Hook/ Hook Spring
8.32 Engine PCB ASSY
8.33 Main PCB ASSY/ Ground Plate/ Ground Spring Plate
8.34 Waste Toner Near/Full Sensor ASSY
8.35 Top Cover ASSY
8.36 Top Cover Panel ASSY
8.37 LCD Panel PCB ASSY
8.38 Rubber Key Printed ASSY
8.39 Key Cap Up, Down, L, R
8.40 USB Host Relay PCB ASSY
8.41 LCD Panel ASSY/ LCD Stopper
8.42 Paper Chute
8.43 Top Cover R
8.44 Top Cover L ASSY
8.45 Wireless LAN PCB ASSY (HL-4070CDW only)
8.46 Laser Unit/ Hook Slope
8.47 Develop Drive Motor ASSY
8.48 Drum Drive ASSY/ Drum Phase Sensor PCB ASSY 1, 2
8.49 Drive Frame Unit ASSY
8.50 Paper Feed/Belt Cleaner Motor ASSY
8.51 Develop Release Sensor PCB ASSY
8.52 Develop Press Drive L ASSY
8.53 Front Cover Interlock Switch ASSY
8.54 Toner Sensor PCB ASSY K, Y, M, C (TE/NEW)
8.55 New Toner Actuator/ New Toner Actuator Spring
8.56 Side Plate R ASSY
8.57 Drum Lock Lever L
8.58 Drum Lock Lever R
8.59 Charge HVPS PCB ASSY
8.60 Toner LED PCB ASSY
8.61 Fuser Unit Fan (FU)
8.62 LVPS Fan (PS)
8.63 Air Intake Fan (AIR)
8.64 PS PCB Unit
8.65 Belt Unit Drive Motor ASSY
9. DISASSEMBLY PROCEDURE (LT-100CL) (HL-4050CDN/ 4070CDW ONLY)
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

CHAPTER 4. ADJUSTMENTS AND UPDATING OF SETTING,
REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB
2. IF YOU REPLACE THE ENGINE PCB

CHAPTER 5. SERVICE FUNCTIONS
1. MAINTENANCE MODE
1.1 How to Enter the Maintenance Mode
1.2 How to Enter the End 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 Test Pattern (Function code 09)
1.4.3 Worker Switch (WSW) Setting and Printout
1.4.4 Operational Check of LCD (Function code 12)
1.4.5 Operational Check of Control Panel PCB (Function code 13)
1.4.6 ROM Version Check (Function code 25)
1.4.7 “One Push Demo” Setting (Function code 28)
1.4.8 Drum Unit Cleaning (Function code 31)
1.4.9 Operational Check of Sensors (Function code 32)
1.4.10 Printout of EEPROM Log (Function code 40)
1.4.11 USB Transfer Speed Change in the PictBridge Mode (Function code 45)
1.4.12 Paper Feeding and Ejecting Test (Function code 67)
1.4.13 Sensitivity Adjustment of Density Sensor (Function code 72)
1.4.14 Sensitivity Adjustment of Registration-mark Sensor (Function code 75)
1.4.15 Printout of Maintenance Information (Function code 77)
1.4.16 Operational Check of Fans (Function code 78)
1.4.17 Display of the Machine’s Log (Function code 80)
1.4.18 Error Code Indication (Function code 82)
1.4.19 Developing Bias Voltage Correction (Function code 83)
1.4.20 Exit from the Maintenance Mode (Function code 99)
2. OTHER SERVICE FUNCTIONS
2.1 Hidden Function Menus Enabled by Pressing Button(s) When Turning the Machine On
2.2 Develop Roller Counter Reset Function
2.3 Printout of Printer Settings
2.4 How to Recover from Errors of the Fuser Unit
2.5 How to Clear and Delete the Password for “Setting Lock”

CHAPTER 6. CIRCUIT DIAGRAMS, WIRING DIAGRAM

APPENDIX 1 WORKER SWITCH (WSW)
APPENDIX 2 DELETION OF PERSONAL INFORMATION
APPENDIX 3 SERIAL NUMBERING SYSTEM
APPENDIX 4 SCREW CATALOGUE
APPENDIX 5 REFERENCES

Number of pages: 333.