Brother HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT HL-L9300CDW HL-L9300CDWT Service Manual and Parts Catalog


Accurate and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Present service manual and parts catalog Brother HL-L8250CDN HL-L8350CDW HL-L8350CDWT HL-L9200CDW HL-L9200CDWT HL-L9300CDW HL-L9300CDWT contain clear instructions and procedures on how to fix the problems occurring in your equipment.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
Table of contents:

SAFETY INFORMATION
CHAPTER 1. SUPPLEMENTAL SPECIFICATIONS
1.1 General
1.2 Network Connectivity
1.3 Service Information
1.4 Supplies

CHAPTER 2. ERROR INDICATION AND TROUBLESHOOTING
1. INTRODUCTION
1.1 Precautions
1.2 Checks before Commencing Troubleshooting
2. OVERVIEW
2.1 Cross-section Drawing
2.2 Paper Feeding
2.3 Operation of Each Part
2.4 Block Diagram
2.5 Main Components
3. ERROR INDICATIONS
3.1 Error Codes
3.2 Error Message
4. TROUBLESHOOTING
4.1 Error Cause and Remedy
4.2 Troubleshooting for Paper Feeding Problems
4.2.1 No paper feeding from paper tray 1
4.2.2 No paper feeding from the LT paper tray unit
4.2.3 No paper feeding from MP tray
4.2.4 Multiple sheets of paper are fed
4.2.5 Paper becomes wrinkled
4.2.6 Paper is fed at an angle
4.2.7 Paper curls
4.2.8 Unable to perform 2-sided printing
4.2.9 Paper jam
4.3 Troubleshooting for Image Defects
4.3.1 Image defect examples
4.3.2 Troubleshooting image defect
4.4 Troubleshooting for Software Problems
4.4.1 Unable to receive data
4.5 Troubleshooting for Network Problems
4.5.1 Cannot make a print through network connection
4.6 Troubleshooting for Control Panel Problems
4.6.1 Nothing is displayed on the LCD/LED
4.6.2 Unable to perform panel operation
4.6.3 The machine does not enter the ready state when the power is turned ON
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems
4.7.1 New toner not detected
4.7.2 Toner cartridge not detected
4.7.3 Toner replacement message displayed on LCD is not cleared
4.7.4 Drum error
4.7.5 Drum replacement message displayed on LCD is not cleared
4.8 Troubleshooting for Fuser Unit Problems
4.8.1 Fuser unit failure
4.9 Troubleshooting for Laser Unit Problems
4.9.1 Laser unit failure
4.10 Troubleshooting for PCB Problems
4.10.1 Main PCB failure
4.10.2 Full memory
4.10.3 Problem of print restriction/ID authentication
4.11 Troubleshooting for Other Problems
4.11.1 Cannot make print
4.11.2 Problem of USB direct interface
4.11.3 Cannot update firmware

CHAPTER 3. DISASSEMBLY AND ASSEMBLY
1. SAFETY PRECAUTIONS
2. PACKING
3. SCREW CATALOGUE
4. SCREW TORQUE LIST
5. LUBRICATION
6. OVERVIEW OF GEARS
7. HARNESS ROUTING
8. DISASSEMBLY FLOW
9. DISASSEMBLY PROCEDURE
9.1 Lift Gear 46/Gear Z19M10
9.2 Support Flap
9.3 Back Cover/Back Cover Stopper Arm L/Back Cover Stopper Arm R
9.4 Fuser Cover ASSY
9.5 Cleaner Pinch Roller S ASSY
9.6 Fuser Unit
9.7 Side Cover L ASSY
9.8 Side Cover R
9.9 Duplex Tray
9.10 MP Cover ASSY/MP Paper Guide ASSY
9.11 MP Link L/MP Link R
9.12 Front Cover
9.13 Front Cover Release Button/Front Cover Release Button Spring
9.14 Top Cover ASSY
9.15 Wireless LAN PCB
9.16 Panel
9.16.1 Panel control PCB ASSY
9.16.1.1 Panel case ASSY/Key PCB flat cable/LCD panel ASSY
9.16.2 Panel cover ASSY
9.16.2.1 Panel PCB ASSY
9.16.2.2 Rubber key printed ASSY
9.16.2.3 LCD
9.17 USB Host Relay PCB ASSY/USB Cover Printed ASSY
9.18 Main PCB ASSY
9.19 Laser Unit Flat Cable/Laser Unit
9.20 Front Cover Sensor
9.21 Process Drive Unit/Fuser Drive Gear Z25
9.22 Main Drive Unit
9.23 Develop Release Drive Unit
9.24 Develop Release Sensor PCB ASSY
9.25 Toner/New Sensor PCB ASSY
9.26 Fuser Fan
9.27 Paper Eject ASSY
9.28 Toner Filter ASSY
9.29 Paper Eject Origin Sensor
9.30 Back Cover Sensor ASSY
9.31 Eject Sensor PCB ASSY
9.32 Registration Mark Sensor Unit
9.33 Power Fan
9.34 Low-voltage Power Supply PCB Unit
9.35 MP Paper Empty Actuator A ASSY/MP Paper Empty Actuator B
9.36 MP Paper Empty/Registration Front Sensor PCB ASSY
9.37 Paper Feed Unit/Joint Pin
9.38 Registration Front/Rear Sensor PCB ASSY
9.39 T1 Paper Feed Sensor PCB ASSY
9.40 High-voltage Power Supply PCB ASSY
9.41 Air Duct Film
9.42 Blower
10. DISASSEMBLY PROCEDURE (LT-320CL/LT-325CL/LT-328CL)
10.1 LT Paper Tray Unit
10.2 LT Cover Rear
10.3 LT Cover Left
10.4 LT Cover Right
10.5 LT Relay PCB ASSY
10.6 LT Paper Feed Frame Unit/LT Edge Actuator

CHAPTER 4. ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT
1. IF YOU REPLACE THE MAIN PCB ASSY
1.1 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware)
1.1.1 Checking firmware version
1.1.2 Installing the firmware
1.2 Initializing the EEPROM of the Main PCB ASSY (Function code 01)
1.3 Restore Machine Information (Function code 41)
1.4 Setting by Country (Function code 74)
1.5 Setting the Serial Number (Function code 80)
1.6 Motor Reset (Function code 57)
1.7 Continuous Adjustments of Density and Registration Sensor (Function code 73)
1.8 Adjustment of Touch Panel (Function code 61)
1.9 Restoration of States at Factory Shipment
2. IF YOU REPLACE THE REGISTRATION MARK SENSOR UNIT
2.1 Continuous Adjustments of Density and Registration Sensor (Function code 73)
3. IF YOU REPLACE THE LOW-VOLTAGE POWER SUPPLY PCB UNIT
3.1 Reset of Irregular Power Supply Detection Counter of Low-Voltage Power Supply PCB (Reset Counters for Parts (Function code 88))
4. IF YOU REPLACE THE PROCESS DRIVE UNIT
4.1 Motor Reset (Function code 57)
5. IF YOU REPLACE THE HIGH-VOLTAGE POWER SUPPLY PCB ASSY
5.1 Installing the Firmware (Sub Firmware, Panel Firmware, Main Firmware, and High-voltage Firmware)
5.1.1 Checking firmware version
5.1.2 Installing the firmware
5.2 Continuous Adjustments of Density and Registration Sensor (Function code 73)
6. IF YOU REPLACE THE TOP COVER ASSY, LCD PANEL ASSY OR PANEL CONTROL PCB ASSY (MODEL WITH TOUCH PANEL ONLY)
6.1 Installing the Firmware
6.1.1 Checking firmware version
6.1.2 Installing the firmware
6.2 Adjustment of Touch Panel (Function code 61)
6.3 Operational Check of LCD (Function code 12)
7. IF YOU REPLACE THE TOP COVER ASSY, PANEL COVER ASSY, PANEL PCB ASSY, LCD (MODEL WITHOUT TOUCH PANEL ONLY)
7.1 Operational Check of LCD (Function code 12)
7.2 Operational Check of Control Panel Key (Function code 13)
8. IF YOU REPLACE THE LASER UNIT
8.1 Continuous Adjustments of Density and Registration Sensor (Function code 73)
8.2 Counter Reset of Laser Unit (Reset Counters for Parts (Function code 88))
9. IF YOU REPLACE THE FUSER UNIT/PF KIT 1, 2, 3, AND MP
9.1 Counter Reset of Fuser Unit or PF Kit 1, 2, 3, and MP (Reset Counters for Parts (Function code 88))

CHAPTER 5. SERVICE FUNCTIONS
1. MAINTENANCE MODE
1.1 How to Enter the Maintenance Mode
1.1.1 How to Enter the Maintenance Mode Exclusive to Service Personnel
1.1.2 How to Enter the End User-accessible Maintenance Mode
1.2 List of Maintenance-mode Functions
1.3 Detailed Description of Maintenance-mode Functions
1.3.1 EEPROM parameter initialization (Function code 01, 91)
1.3.2 Monochrome image quality test pattern (Function code 09)
1.3.3 Worker switch (WSW) setting and printout (Function code 10, 11)
1.3.4 Operational check of LCD (Function code 12)
1.3.5 Operational check of control panel key (Function code 13)
1.3.6 Software version check (Function code 25)
1.3.7 “One Push Demo” setting (Function code 28)
1.3.8 Operational check of sensors (Function code 32)
1.3.9 LAN connection status display (Function code 33)
1.3.10 EEPROM Dump Print (Function code 40)
1.3.11 Backup of machine information (Function code 41)
1.3.12 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)
1.3.13 Motor reset (Function code 57)
1.3.14 Adjustment of touch panel (Function code 61) (Model with touch panel only)
1.3.15 Adjustment of color registration (Adjustment of inter-color position alignment) (Function code 66)
1.3.16 Continuous print test (Function code 67)
1.3.17 Laser unit test pattern print (Function code 68)
1.3.18 Frame pattern print (One-sided) (Function code 69)
1.3.19 Frame pattern print (Two-sided) (Function code 70)
1.3.20 Color test pattern (Function code 71)
1.3.21 Sensitivity adjustment of density sensor (Function code 72)
1.3.22 Continuous adjustments of density and registration sensor (Function code 73)
1.3.23 Setting by country (Function code 74)
1.3.24 Printout of maintenance information (Function code 77)
1.3.25 Operational check of fans (Function code 78)
1.3.26 Display of device log information (Function code 80)
1.3.27 Display of device error codes (Function code 82)
1.3.28 Developing bias voltage correction (Function code 83)
1.3.29 Reset counters for parts (Function code 88)
1.3.30 Exit from the maintenance mode (Function code 99)
2. OTHER SERVICE FUNCTIONS
2.1 Drum Cleaning
2.2 Counter Reset of Consumable Parts (Drum Unit/Belt Unit)

CHAPTER 6. WIRING DIAGRAM
1. WIRING DIAGRAM

CHAPTER 7. PERIODICAL MAINTENANCE
1. SAFETY PRECAUTIONS
2. PERIODICAL REPLACEMENT PARTS
2.1 Procedures to Replace Periodical Replacement Parts
2.1.1 Fuser unit
2.1.2 Laser unit
2.1.3 PF kit 1
2.1.4 PF kit 2/3
2.1.5 PF kit MP

APPENDIX 1 SERIAL NUMBERING SYSTEM
APPENDIX 2 DELETION OF USER SETTING INFORMATION
APPENDIX 3 INSTALLING THE MAINTENANCE PRINTER DRIVER

& Parts Catalog.

Brother HLL8250CDN HLL8350CDW HLL8350CDWT HLL9200CDW HLL9200CDWT HLL9300CDW HLL9300CDWT BrotherHLL8250CDN BrotherHLL8350CDW BrotherHLL8350CDWT BrotherHLL9200CDW BrotherHLL9200CDWT BrotherHLL9300CDW BrotherHLL9300CDWT