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Brother DCP-9010N MFC-9010CN MFC-9120CN MFC-9125CN MFC-9320CW MFC-9325CW Service Manual



This comprehensive service manual provides detailed instructions and guidance for servicing and repairing the Brother DCP-9010N, MFC-9010CN, MFC-9120CN, MFC-9125CN, MFC-9320CW, and MFC-9325CW multifunction printers.

Key Features:



* Troubleshooting and Diagnostics: Step-by-step procedures for identifying and resolving common issues, including paper jams, print quality problems, and network connectivity errors.
* Disassembly and Assembly Instructions: Detailed instructions for disassembling and reassembling various components, such as the print head, paper feed system, and LCD display.
* Component Replacement and Repair: Comprehensive instructions for replacing and repairing key components, including rollers, sensors, and circuit boards.
* Adjustment and Calibration Procedures: Precise guidance for adjusting and calibrating the printer's print quality, alignment, and other important settings.
* Technical Specifications and Schematics: Essential technical information, including detailed schematics and electrical diagrams for accurate troubleshooting and repair.

Benefits of Using This Manual:



* Increased Uptime: Timely troubleshooting and repair procedures help minimize downtime and ensure optimal printer performance.
* Cost Savings: Detailed instructions empower technicians to perform repairs in-house, reducing the need for expensive external service calls.
* Enhanced Printer Life: Proper maintenance and repair techniques extend the life of the printer, maximizing its value and return on investment.
* Improved Productivity: Efficient troubleshooting and repair processes minimize interruptions and maintain a high level of productivity in the workplace.
* Comprehensive Coverage: Provides complete coverage for all models mentioned, ensuring a single resource for all servicing and repair needs.

This service manual is an indispensable tool for technicians, IT professionals, and anyone responsible for maintaining and repairing Brother DCP-9010N, MFC-9010CN, MFC-9120CN, MFC-9125CN, MFC-9320CW, and MFC-9325CW multifunction printers.

Service Manual Brother DCP-9010N, MFC-9010CN, MFC-9120CN, MFC-9125CN, MFC-9320CW, MFC-9325CW;
This manual is in the PDF format and have detailed Diagrams, pictures and full procedures to diagnose and repair your Brother DCP-9010N, MFC-9010CN, MFC-9120CN, MFC-9125CN, MFC-9320CW, MFC-9325CW 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 the simulation codes, trouble codes, maintenance procedures, reset procedures, diagnose procedures of Brother DCP-9010N, MFC-9010CN, MFC-9120CN, MFC-9125CN, MFC-9320CW, MFC-9325CW photocopier. You can find easily everything what do you need.
To see what contain, please read table of contents:

CHAPTER 1. SPECIFICATIONS
This chapter lists the specifications of each model, which enables you to make a comparison of
different models.
1. COMPONENTS
2. SPECIFICATIONS LIST
2.1 General
2.2 Network Connectivity
2.3 Service Information
2.4 Consumables
2.5 Paper
2.5.1 Paper handling
2.5.2 Media specifications
2.5.3 Type and size of paper
2.6 Printable Area
2.7 Print Speeds with Various Settings
2.8 Telephone
2.9 FAX
2.10 List/Report
2.11 Copy
2.12 Scanner
2.13 USB Direct Interface

CHAPTER 2. THEORY OF OPERATION
This chapter gives an overview of the printing mechanisms as well as the sensors, actuators and control electronics. It aids in understanding the basic principles of operation as well as locating defects
for troubleshooting.
1. GENERAL BLOCK DIAGRAM
2. ELECTRONICS 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 Paper supply from manual feed slot and paper eject from back
3.4 Toner Cartridge
3.4.1 Type of toner cartridge
3.4.2 Life of toner cartridge
3.4.3 Method of detecting toner life
3.4.4 Relationship between toner amount and life of toner cartridge in number of rotations of develop roller
3.4.5 New toner detection
3.4.6 Method of counting the number of toner replacements
3.5 Principle of Color Overlapping
3.6 Basic Printing Principle
3.6.1 Charging
3.6.2 Exposure
3.6.3 Development
3.6.4 Transfer
3.6.5 Fusing
3.6.6 Toner cleaning
3.7 Location of Sensors
3.8 Adjustment of Color Registration
3.8.1 Color registration error in sub/main scanning direction
3.9 Adjustment of Color Density

CHAPTER 3. ERROR INDICATION AND TROUBLESHOOTING
This chapter details error messages and codes which the incorporated self-diagnostic function of the
machine will display if any error or malfunction occurs. If any error message appears, refer to this
chapter to find which parts should be checked or replaced.
The latter half of this chapter provides sample problems which could occur in the main sections of the
machine and related troubleshooting procedures.
CONTENTS
1. INTRODUCTION
1.1 Precautions
1.2 Components
1.3 Initial Check
2. ERROR INDICATIONS
2.1 Error Codes
2.2 Error Messages
2.3 Error Cause and Remedy
3. PAPER FEEDING PROBLEMS
3.1 No Feeding
3.2 Double Feeding
3.3 Paper Jam
3.4 Dirt on Paper
3.5 Wrinkles on Paper
4. PRINT IMAGE DEFECT FROM PC/USB/FAX RECEPTION TROUBLESHOOTING
4.1 Image Defect Examples
4.2 Pitch Indicated in Roller Image
4.3 Troubleshooting Image Defect
5. SOFTWARE SETTING PROBLEMS
5.1 Cannot Print Data
6. NETWORK PROBLEMS
6.1 Cannot Make a Print through Network Connection
7. TROUBLESHOOTING OF THE COMMUNICATIONS ERRORS
7.1 Definition of Error Codes on the Communications List
8. TROUBLESHOOTING OF THE CONTROL PANEL COVER ASSY
8.1 Nothing is Displayed on the LCD
8.2 The control panel cover ASSY does not Work
9. TROUBLESHOOTING OF FAX FUNCTIONS
9.1 FAX can't Send it
9.2 Speed Dialing and One-touch Dialing can't be Used
9.3 FAX can't be Received
9.4 No Bell Ring
9.5 Speaker is Silent During On-hook Dialing
9.6 Dialing Function does not Switch between "Tone" and "Pulse"
10. DOCUMENT FEEDING PROBLEMS
10.1 No Feeding
10.2 Double Feeding
10.3 Paper Jam
10.4 Wrinkles
11. SCANNING IMAGE DEFECT TROUBLESHOOTING
11.1 Image Defect Examples
11.2 Troubleshooting Image Defect
12. OTHERS PROBLEMS
12.1 The Machine is not Turned on, or the LCD Indication does not Appear
12.2 The Fan does not Work
12.3 Pickup Function of Paper Tray does not Work
12.4 The New Toner is not Detected
12.5 Printing from Macintosh Applications Fails
12.6 USB Direct Printing does not Work.
(USB direct interface model only)

CHAPTER 4. PERIODICAL MAINTENANCE
This chapter details consumable parts and periodical maintenance parts. This chapter also covers
procedures for disassembling and assembling periodical maintenance parts.
1. SAFETY PRECAUTIONS
2. CONSUMABLE PARTS
3. PERIODICAL MAINTENANCE PARTS
3.1 Periodical Maintenance Parts
3.2 Procedures to Replace Periodical Maintenance Parts
3.2.1 Fuser unit
3.2.2 Paper feeding kit

CHAPTER 5. DISASSEMBLY AND ASSEMBLY
This chapter describes procedures for disassembling and assembling the machine with relates notes.
The provided disassembly order flow enables you to take in the quickest way to get an involved part at
a glance.
At the start of disassembling, you can check the disassembly order flow which guides you through a
shortcut to get to the part.
This chapter also covers screw tightening torques and lubrication points where the specified lubrication
should be applied when the machine is assembled.
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 Cord Hook
8.2 EXT Cap
8.3 Roller Holder ASSY
8.4 Separation Pad ASSY
8.5 Back Cover/Back Cover Stopper L/R
8.6 Fuser Cover
8.7 Paper Eject Front Actuator
8.8 Fuser Unit
8.9 Side Cover L ASSY/Access Cover
8.10 Side Cover R ASSY
8.11 Pull Arm L/Pull Arm R/Pull Arm Spring
8.12 Hinge ASSY L
8.13 Hinge R/Hinge R Support/Hinge Base
8.14 ADF Cover ASSY
8.15 Gear Cover
8.16 Separation Roller Shaft ASSY
8.17 Upper Document Chute ASSY
8.18 Separation Rubber ASSY
8.19 Paper Feed Roller ASSY
8.20 Ejection Roller ASSY
8.21 ADF Sensor PCB ASSY
8.22 Drive Frame ASSY
8.23 Paper Stack Lever
8.24 Document Hold ASSY
8.25 Control Panel Cover ASSY
8.26 Document Scanner Unit
8.27 Panel PCB ASSY
8.28 Rubber Key L/R
8.29 LCD/LCD Cover
8.30 NCU PCB ASSY (NCU model only)
8.31 Battery ASSY
8.32 Pull Arm Guide
8.33 Top Dress Cover L/R
8.34 FB Lock Lever L/R
8.35 Joint Cover Lock Spring/Joint Cover Lock Lever
8.36 Wireless LAN PCB ASSY (Wireless LAN model only)
8.37 USB Direct Interface Relay PCB ASSY (USB direct interface model only)
8.38 Panel Ground Plate 2 (Only the models without the USB direct interface)
8.39 Speaker Unit/Front Cover Top Base
8.40 Front Cover
8.41 Manual Feed Slot ASSY
8.42 TC Arm Spring
8.43 Arm Guide L Cover
8.44 Joint Cover Sub ASSY
8.45 Inner Chute ASSY 2
8.46 TC Release Lever
8.47 Paper Stack Lever ASSY
8.48 FFC Harness:MAIN-LED CTL
8.49 LED Power Relay PCB ASSY
8.50 LED Head Control PCB ASSY
8.51 LED ASSY/Holder Hook
8.52 Z Spring L/Z Spring R
8.53 Develop Release Motor ASSY
8.54 Main PCB ASSY
8.55 Engine PCB ASSY
8.56 Main PCB Insulation Sheet/Engine Insulation Sheet
8.57 Main PCB Shield Plate
8.58 Engine Shield Plate
8.59 Registration Mark Relay PCB ASSY
8.60 Drum Develop Drive Unit
8.61 Develop Drive Motor
8.62 Paper Feed Motor ASSY
8.63 Paper Feed Unit
8.64 Registration Front/Rear Sensor PCB ASSY
8.65 Manual Sensor PCB ASSY
8.66 Pick-up Sector Gear Spring/Friction Spring
8.67 PF Registration Solenoid
8.68 Pick-up Solenoid/Pick-up Solenoid Lever Spring
8.69 Fuser/Eject Drive Motor
8.70 Fuser/Eject Drive Motor Sensor PCB ASSY
8.71 Top Cover Arm R
8.72 Top Cover Arm L
8.73 Air Filter Holder ASSY/Ozone Filter
8.74 Paper Eject Rear Actuator/Paper Eject Rear Actuator Spring/ Paper Eject Rear Actuator Top
8.75 Eject Rear Sensor PCB ASSY
8.76 Eject Front Sensor PCB ASSY
8.77 Toner/New Sensor PCB ASSY
8.78 Belt Drive ASSY
8.79 Drum Motor Origin Sensor PCB ASSY
8.80 LV Fan ASSY
8.81 Main Fan ASSY
8.82 Low-voltage Power Supply PCB ASSY
8.83 Registration Sensor Holder ASSY
8.84 High-voltage Power Supply PCB ASSY
8.85 HVPS Control PCB ASSY
8.86 Waste Toner Sensor
8.87 Develop Release Sensor PCB ASSY
8.88 Belt Cleaner Spring
8.89 TR Head Spring
8.90 Side Frame R
8.91 Toner LED PCB ASSY/LED Holder
8.92 LM Hook B/LM Hook C/Hook Spring BC10

CHAPTER 6. ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT
This chapter describes adjustments and updating of settings, which are required if the main PCB and
some other parts have been replaced. This chapter also covers how to update the firmware.
1. IF YOU REPLACE THE MAIN PCB
1.1 Rewriting the Firmware (Main Firmware, Sub Firmware (PCL/PS))
1.1.1 Checking firmware version
1.1.2 Rewriting the firmware using computer
1.1.3 Rewriting the firmware using USB flash memory (USB direct interface model only)
1.2 Setting by Country (Maintenance Mode: Code 74)
1.3 Initialization of EEPROM of Main PCB (Maintenance Mode: Code 01)
1.4 Setting the Serial Number
1.5 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72)
1.6 Performing the Developing Bias Voltage Correction (Maintenance Mode: Code 83)
1.7 Performing the Adjustment of Color Registration (Maintenance Mode: Code 66)
1.8 Acquiring MAC Address (Ethernet Address) from Wireless LAN PCB (Wireless LAN model only)
1.9 Acquiring White Level Data (Maintenance Mode: Code 55)
1.10 Performing Operational Check of Operation Panel Buttons (Maintenance Mode: Code 13)
2. IF YOU REPLACE THE WIRELESS LAN PCB (WIRELESS LAN MODEL ONLY)
2.1 Acquiring MAC Address (Ethernet Address) from Main PCB
3. IF YOU REPLACE THE REGISTRATION SENSOR HOLDER ASSY
3.1 Sensitivity Adjustment of Density Sensor (Maintenance Mode: Code 72)
4. IF YOU REPLACE THE DOCUMENT SCANNER UNIT
4.1 Acquiring White Level Data and Setting CIS Scanner Area

CHAPTER 7. SERVICE FUNCTIONS
Describes the maintenance mode which is exclusively designed for the purpose of checking the settings and adjustments using the buttons on the control panel.
This chapter also covers not-disclosed-to-users function menus, which activate settings and functions
or reset the parts life.
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 Printout of scanning compensation data (Function code 05)
1.4.3 Placement of scanner unit in position for transportation (Function code 06)
1.4.4 ADF Performance Test (Function code 08)
1.4.5 Monochrome image quality test pattern (Function code 09)
1.4.6 Worker switch (WSW) setting and printout (Function code 10, 11)
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 Software version check (Function code 25)
1.4.10 Operational check of sensors (Function code 32)
1.4.11 PC print function (Function code 43)
1.4.12 Not-disclosed-to-users functions (Function code 45)
1.4.13 EEPROM customizing (User-accessible) (Function code 52)
1.4.14 Received data transfer function (Function code 53) (FAX model only)
1.4.15 Fine adjustment of scan start/end positions (Function code 54)
1.4.16 Acquisition of white level data (Function code 55)
1.4.17 Adjustment of color registration (Function code 66)
1.4.18 Continuous print test (Function code 67)
1.4.19 LED test pattern print (Function code 68)
1.4.20 Frame pattern print (Function code 69)
1.4.21 Color test pattern (Function code 71)
1.4.22 Sensitivity adjustment of density sensor (Function code 72)
1.4.23 Setting by country (Function code 74)
1.4.24 Sensitivity adjustment of registration mark sensor and check of belt surface (Function code 75)
1.4.25 Printout of maintenance information (Function code 77)
1.4.26 Operational check of fans (Function code 78)
1.4.27 Display of the machine�s log (Function code 80)
1.4.28 Error code indication (Function code 82)
1.4.29 Developing bias voltage correction (Function code 83)
1.4.30 Output of transmission log to the telephone line (Function code 87)
1.4.31 Counter reset after replacing the fuser unit and paper feeding kit (Function code 88)
1.4.32 Exit from maintenance mode (Function code 99)
2. OTHER SERVICE FUNCTIONS
2.1 Resetting the Periodical Maintenance 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
2.2 Develop Roller Counter Reset Function
2.3 How to Recover from Errors of the Fuser Unit

CHAPTER 8. CIRCUIT DIAGRAMS & WIRING DIAGRAM
This chapter provides the circuit diagrams and wiring diagram for the connections of the PCBs.
1. CIRCUIT DIAGRAMS
2. WIRING DIAGRAM

APPENDIX

Number of pages: 598.