Brother DCP-8070D, DCP-8080DN, DCP-8085DN, MFC-8370DN, MFC-8380DN, MFC-8480DN, MFC-8880DN, MFC-8890DW Laser FAX-MFC, Service Manual

Service Manual Brother DCP-8070D, DCP-8080DN, DCP-8085DN, MFC-8370DN, MFC-8380DN, MFC-8480DN, MFC-8880DN, MFC-8890DW Laser FAX-MFC;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Brother DCP-8070D, DCP-8080DN, DCP-8085DN, MFC-8370DN, MFC-8380DN, MFC-8480DN, MFC-8880DN, MFC-8890DW Laser FAX-MFC copier.
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 DCP-8070D, DCP-8080DN, DCP-8085DN, MFC-8370DN, MFC-8380DN, MFC-8480DN, MFC-8880DN, MFC-8890DW Laser FAX-MFC photocopier. You can find easily everything what do you need.
To see what contain, please read table of contents:

CHAPTER 1. SPECIFICATIONS
1. COMPONENTS
2. SPECIFICATIONS LIST
2.1 Printing
2.2 Functions
2.3 Electronics and Mechanics
2.4 Network Connectivity
2.5 Service Information
2.6 Paper
2.6.1 Paper handling
2.6.2 Media specifications
2.6.3 Type and size of paper
2.7 Printable Area
2.8 Print Speeds with Various Settings
2.9 Telephone
2.10 Fax
2.11 List/Report
2.12 Copy
2.13 Document Scanner
2.14 USB Host

CHAPTER 2. THEORY OF OPERATION
1. OVERVIEW
2. ELECTRONICS
2.1 General Block Diagram
3. MECHANICS
3.1 Cross-section Drawing
3.2 Scanner Mechanism
3.2.1 Document scanner unit
3.2.2 ADF unit
3.3 Paper Feeding
3.3.1 Plate-up Function of the Paper Tray
3.3.2 Paper supply
3.3.3 Paper registration
3.3.4 Paper eject
3.3.5 Duplex printing
3.3.6 Paper feeding from the MP tray
3.3.7 Paper feeding from the LT tray (Tray2)
3.4 Toner Cartridge
3.4.1 Methods for Detecting Toner Life
3.4.2 Cartridge life
3.4.3 New toner detection
3.5 Print
3.5.1 Basic Principle
3.5.2 Print Process
3.6 Sensors position

CHAPTER 3. ERROR INDICATION AND TROUBLESHOOTING
1. INTRODUCTION
1.1 Precautions
1.2 Part names
1.3 Initial Check
2. DISTINGUISH ERROR CAUSE
2.1 ERROR INDICATION
2.1.1 Error messages appearing on the LCD
3. ERROR CODES
3.1 Error Indication
3.2 Error Code Cause and Remedy
4. PAPER FEEDING PROBLEMS
4.1 No Feeding
4.2 Double Feeding
4.3 Paper Jam
4.4 Dirt on Paper
4.5 Wrinkles or creases
4.6 Waves in the paper / folds in the paper at the eject roller 2
4.8 Prints only single side of the paper when duplex-printing
5. TROUBLESHOOTING FOR PRINT IMAGE DEFECT FROM PC/USB/FAX RECEPTION
5.1 Image Defect Examples
5.2 The pitch which appears in the image caused by failure of a roller
5.3 Troubleshooting for image Defect
6. SOFTWARE SETTING PROBLEMS
7. NETWORK PROBLEMS
8. TROUBLESHOOTING OF THE COMMUNICATIONS ERRORS
9. TROUBLESHOOTING OF THE CONTROL PANEL
10. TROUBLESHOOTING OF FAX FUNCTIONS
11. DOCUMENT FEEDING PROBLEMS
11.1 No Feeding
11.2 Double Feeding
11.3 Paper Jam
11.4 Wrinkles
12. SCANNING IMAGE DEFECT TROUBLESHOOTING
12.1 Image Defect Examples
12.2 Troubleshooting Image Defect
13. OTHERS PROBLEMS

CHAPTER 4. PERIODICAL MAINTENANCE
1. PERIODICAL MAINTENANCE PARTS
1.1 Periodical Maintenance Parts
1.2 Procedures to Replace Periodical Maintenance Parts
1.2.1 Fuser unit and laser unit
1.2.2 Paper feeding kit for tray 1, 2
1.2.3 Paper feeding kit for MP tray

CHAPTER 5. DISASSEMBLY/REASSEMBLY
1. SAFETY PRECAUTIONS
2. TRANSFERRING RECEIVED FAX DATA
3. PACKING
4. SCREW TORQUE LIST
5. LUBRICATION
6. GEAR LAYOUT DRAWING
7. HARNESS ROUTING
8. DISASSEMBLY FLOW CHART
9. DISASSEMBLY PROCEDURE
9.1 Paper Tray
9.2 Back Cover
9.3 Rear Chute ASSY
9.4 Fuser Unit
9.5 Tray MP ASSY
9.6 MP Tray Cover ASSY / Process Cover ASSY / Emblem cover
9.7 Access Cover / Side Cover L
9.8 ADF Unit
– CCD model
9.8.1 ADF Unit
9.8.2 Hinge Arm R
9.8.3 Hinge Base R
9.8.4 Hinge ASSY L
9.8.5 ADF Cover ASSY
9.8.6 ADF Side Cover F
9.8.7 ADF Side Cover R
9.8.8 ADF Chute ASSY
9.8.9 Sub Chute ASSY (For the models with the DX only) /
SX Chute (For the models without the DX only)
9.8.10 Exit Chute Cover ASSY
9.8.11 Earth Spring
9.8.12 PF Roller Holder ASSY
9.8.13 LF Roller 1 ASSY
9.8.14 Switch Back Roller ASSY (For the models with the Reading DX only)
9.8.15 ADF Motor
9.8.16 Switch Back Solenoid ASSY (For the models with the DX only)
9.8.17 PF Solenoid ASSY (For the models with the DX only)
9.8.18 ADF Relay PCB
9.8.19 Paper Feed Chute ASSY
9.8.20 Document Front Actuator 1 / Document Front Sensor 1 (For the models with the DX only)
9.8.21 Document Front Actuator 2 / Document Front Sensor 2 (For the models with the DX only)
9.8.22 ADF Film / Spring Plate ADF Front A ASSY / Separation Rubber / Rubber Holder / Separation Spring
9.8.23 Pressure Roller / LF Spring
9.8.24 LF Roller 2 ASSY
9.8.25 Document Exit Roller ASSY
9.8.26 LF Roller 3 ASSY
9.8.27 LF Roller 4 ASSY
9.8.28 Flap A ASSY (For the models with the DX only) / Flap A (For the models with out the DX only)
9.8.29 Document Hold / Document Hold Spring
9.8.30 Upper Main Chute ASSY / Lower Main Chute ASSY
9.8.31 Document Rear Actuator / Document Rear Sensor
9.8.32 Flap B
9.8.33 Actuator Switch Back / Switch Back Sensor (For the models with the DX only)
9.8.34 Document Eject Tray
9.8.35 Document Cover Sensor
9.8.36 Eject Roller B4
9.8.37 Pressure Roller
– CIS model
9.8.38 ADF Unit
9.8.39 Hinge Arm R
9.8.40 Hinge ASSY
9.8.41 ADF Cover ASSY
9.8.42 ADF Front Cover
9.8.43 ADF Gear Cover
9.8.44 ADF Chute ASSY
9.8.45 Document Sponge Support
9.8.46 ADF Relay PCB ASSY
9.8.47 Motor Frame ASSY
9.8.48 PF Solenoid ASSY
9.8.49 ADF Motor
9.8.50 Exit Solenoid ASSY
9.8.51 Separate Roller Holder ASSY
9.8.52 Lower Document Chute ASSY
9.8.53 Document Front Actuator 2 / Document Front Sensor 2
9.8.54 Document Front Actuator 1 / Document Front Sensor 1
9.8.55 Pressure Roller
9.8.56 Separation Rubber
9.8.57 LF Roller 1 ASSY
9.8.58 LF Roller 2 ASSY
9.8.59 Document Exit Tray Sensor Cover ASSY
9.8.60 Document Eject Actuator / Document Eject Sensor
9.8.61 Document Exit Tray Roller Holder ASSY
9.8.62 Actuator Switch Back / Switch Back Sensor
9.8.63 Document Rear Actuator / Document Rear Sensor
9.8.64 LF2 Film
9.8.65 ADF Cover Open Sensor Holder
9.8.66 Document Exit Roller ASSY
9.8.67 Switch Back Roller ASSY
9.8.68 LF Roller 3 ASSY
9.9 Panel Cover ASSY
– CCD model
9.9.1 Panel Cover ASSY
– CIS model
9.9.2 Panel Cover ASSY
9.10 Scanner Unit ASSY
– CCD model
9.10.1 Scanner Unit ASSY
9.10.2 Top Cover ASSY
9.10.3 Lock Lever B / Lock Lever ASSY
9.10.4 CCD Module
9.10.5 FFC Cable ASSY
9.10.6 Scanner Motor FB
9.10.7 Pulley ASSY
9.10.8 Home Position Sensor
– CIS model
9.10.9 Scanner Unit
9.11 Panel Unit
– CCD model
9.11.1 Panel Unit
9.11.2 Panel PCB ASSY
9.11.3 Printed Rubber Key
Confidential
9.11.4 LCD Cover / Backlight Module / LCD
– CIS model
9.11.5 Panel Unit
9.11.6 Back Light PCB ASSY
9.11.7 Panel PCB ASSY / Rubber Key R/C/L
9.11.8 LCD Holder / Panel Light Guide
9.11.9 Scanner Dress Cover L/R
9.12 NCU PCB ASSY (For the models with the NCU only)
– CCD model
9.12.1 NCU PCB ASSY
– CIS model
9.12.2 NCU PCB ASSY
9.13 Speaker ASSY
– CCD model
9.13.1 Speaker ASSY
– CIS model
9.13.2 Speaker ASSY
9.14 Driver PCB
– CCD model
9.14.1 Driver PCB
– CIS model
9.14.2 Driver PCB
9.15 USB HOST PCB ASSY
9.16 Side Cover R
9.17 Battery
– CCD model
9.17.1 Battery
– CIS model
9.17.2 Battery
9.18 Joint Cover ASSY
– CCD model
9.18.1 Joint Cover ASSY
– CIS model
9.18.2 Joint Cover ASSY
9.18.3 Pull Arm Guide
9.18.4 Joint Cover FL/FR
9.18.5 USB Host PCB ASSY
9.18.6 Inner Chute
9.18.7 Paper Stack Lever
9.19 Main PCB
9.20 Gear Plate Calking ASSY / Develop Joint / Main Motor ASSY
9.21 Main Shield Plate ASSY
9.22 Relay Rear PCB ASSY / LT Connector
9.23 Relay Front PCB ASSY
9.24 Drive Release Link
9.25 MP Solenoid ASSY
9.26 T1 Solenoid ASSY
9.27 Toner Sensor PCB ASSY
9.28 Register Solenoid ASSY
9.29 Ejector Solenoid ASSY
9.30 Front Cover Sensor ASSY
9.31 New Toner Actuator
9.32 Gear 17/20/23
9.33 Thermistor ASSY
9.34 Filter
9.35 Laser Unit
9.36 LVPS PCB Unit
9.37 High-Voltage PS PCB ASSY
9.38 Wireless LAN PCB (PCB T60H989 ASSY 04) (Wireless LAN model)
9.39 Toner LED PCB Unit ASSY
9.40 Fan Motor 60 Unit
9.41 Fan Motor 60 Unit LV
9.42 FRAME L ASSY
9.43 MP Unit
9.44 Regist Actuator Rear / Regist Actuator Spring
9.45 Regist Actuator Front / Regist Actuator Spring
9.46 Roller Holder ASSY
9.47 PE Actuator / Edge Actuator / Edge Actuator Spring
9.48 PE EG Sensor ASSY
10. DISASSEMBLY PROCEDURE OPTIONAL LOWER TRAY (LT-5300)
10.1 Paper Tray
10.2 LT Front Cover ASSY
10.3 LT Rear Cover
10.4 LT Side Cover L
10.5 LT Side Cover R
10.6 LT PCB ASSY
10.7 Connector: 55533-1219
10.8 Connector: 54702-1219
10.9 Gear 24 LT
10.10 Collar 6
10.11 LT Solenoid ASSY
10.12 Roller Holder ASSY
10.13 Edge Actuator Spring
10.14 PE Actuator / Edge Actuator
10.15 LT Sensor PCB ASSY

CHAPTER 6. ADJUSTMENTS AND UPDATING OF SETTINGS,
REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB
2. IF YOU REPLACE THE WIRELESS LAN PCB
3. IF YOU REPLACE THE DOCUMENT SCANNER UNIT

CHAPTER 7. SERVICE FUNCTIONS
1. ENTRY INTO THE MAINTENANCE MODE
2. LIST OF MAINTENANCE-MODE FUNCTIONS
3. USER-ACCESS TO THE MAINTENANCE MODE
4. DETAILED DESCRIPTION OF MAINTENANCE-MODE FUNCTIONS
4.1 EEPROM Parameter Initialization (Function code 01/91)
4.2 Printout of Scanning Compensation Data (Function code 05)
4.3 Placement of Document Scanner Unit in Position for Transportation (Function code 06)
4.4 ADF Performance Test (Function code 08)
4.5 Test Pattern 1 (Function code 09)
4.6 Firmware Switch Setting and Printout
4.6.1 Firmware switch setting (Function code 10)
4.6.2 Printout of firmware switch data (Function code 11)
4.7 Operation Check of LCD (Function code 12)
4.8 Operational Check of Control Panel Button (Function code 13)
4.9 ROM Version Check (Function code 25)
4.10 Sensor Operational Check (Function code 32)
4.11 PC Print Function (Function code 43)
4.12 Switching the USB Setting (Function code 45)
4.13 EEPROM Customizing (User-accessible) (Function code 52)
4.14 Received Data Transfer Function (Function code 53) (only model with FAX)
4.15 Fine Adjustment of Scan Start/End Positions (Function code 54)
4.16 Acquisition of White Level Data and CCD Scanner Area Setting (Function code 55)
4.17 Paper Feeding and Ejecting Test (Function code 67)
4.18 EEPROM Customizing (Function code 74)
4.19 Operational Check of Fans (Function code 78)
4.20 Display of the Machine’s Log Information (Function code 80)
4.21 Error Code Indication (Function code 82)
4.22 Output of Transmission Log to the Telephone Line (Function code 87)
4.23 Counter Reset After Replacing the Fuser Unit, Laser Unit and Paper Feed Kit (Function code 88)
4.24 Maintenance Mode Finish (Function code 99)
5. OTHER SERVICE FUNCTIONS
5.1 Resetting the Periodical Maintenance Parts Life
5.2 Develop Roller / Developing Bias Voltage Counter Reset Function
5.3 Drum condensation countermeasure mode
5.4 Unlocking and Clearing the Password of the Function Lock / Setting Lock
5.5 Clearing the Data of the Secure Print

CHAPTER 8. CIRCUIT DIAGRAMS, WIRING DIAGRAM
1. CIRCUIT DIAGRAMS
2. WIRING DIAGRAM

FIRMWARE SWITCHES (WSW)
DELETION OF USER SETTING INFORMATION, etc.
SERIAL NUMBERING SYSTEM
SCREW CATALOGUE
GLOSSARY

Brother DCP8070D DCP8080DN DCP8085DN, MFC8370DN MFC8380DN, MFC-8480DN, MFC8880DN MFC8890DW