Table of Contents
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Table of Contents
Troubleshooting
Related Manuals for Brother L8350CDWT
Summarization of Contents
CHAPTER 1 SUPPLEMENTAL SPECIFICATIONS
1.1 General Specifications
Provides a functional comparison between printer models and their specifications.
1.2 Network Connectivity
Details the network interface types for different printer models.
1.3 Service Information
Covers machine life, MTBF, MTTR, and periodical maintenance parts replacement.
1.4 Supplies
Lists toner cartridges, drum unit, and belt unit specifications and life expectancy.
CHAPTER 2 ERROR INDICATION AND TROUBLESHOOTING
1.1 Precautions
Outlines essential safety precautions and warnings before troubleshooting.
1.2 Checks before Commencing Troubleshooting
Lists pre-troubleshooting checks for operating environment, power, paper, and consumables.
2.1 Cross-section Drawing
Illustrates the internal components and their layout within the printer.
2.2 Paper Feeding
Diagrams showing paper paths for different trays and duplex printing.
2.3 Operation of Each Part
Describes the function of various printer components in the paper feeding and eject process.
2.4 Block Diagram
Shows the interconnections between major electronic components and the Main PCB ASSY.
2.5 Main Components
An exploded view illustrating the main internal parts of the printer.
3.1 Error Codes
Lists error codes, their descriptions, and references for troubleshooting.
3.2 Error Message
Details error messages displayed on the LCD and their corresponding states.
4.1 Error Cause and Remedy
Provides step-by-step solutions for specific error codes and print failures.
4.2 Troubleshooting for Paper Feeding Problems
Addresses issues related to paper jams and incorrect feeding from various trays.
4.3 Troubleshooting for Image Defects
Details common image quality issues and their potential causes and remedies.
4.4 Troubleshooting for Software Problems
Covers issues related to software settings, driver configuration, and computer communication.
4.5 Troubleshooting for Network Problems
Addresses issues related to network connectivity and inability to print over a network.
4.6 Troubleshooting for Control Panel Problems
Covers issues where the LCD or control panel keys are not functioning correctly.
4.7 Troubleshooting for Toner Cartridge and Drum Unit Problems
Addresses errors related to toner or drum unit detection and replacement messages.
4.8 Troubleshooting for Fuser Unit Problems
Diagnoses and provides solutions for fuser unit failures.
4.9 Troubleshooting for Laser Unit Problems
Details troubleshooting steps for laser unit failures.
4.10 Troubleshooting for PCB Problems
Covers issues related to Main PCB, memory, and other circuit board failures.
4.11 Troubleshooting for Other Problems
Addresses miscellaneous issues like printing errors, USB interface, and firmware updates.
CHAPTER 3 DISASSEMBLY AND ASSEMBLY
1. Safety Precautions for Disassembly
Provides crucial warnings and precautions for safe disassembly and reassembly procedures.
9. Disassembly Procedure
Detailed steps for disassembling various printer components and assemblies.
9.1 Lift Gear 46/Gear Z19M10
Instructions for removing the lift gear and specific gears from the paper tray.
9.3 Back Cover/Stopper Arm Removal
Procedure for removing the back cover and its stopper arms.
9.4 Fuser Cover ASSY Removal
Steps for removing the fuser cover assembly, including releasing hooks and screws.
9.6 Fuser Unit Removal
Detailed instructions for disconnecting connectors and removing the fuser unit.
9.18 Main PCB ASSY Removal
Procedure for disconnecting connectors and removing the Main PCB ASSY.
9.19 Laser Unit Flat Cable/Laser Unit Removal
Steps to disconnect the laser unit flat cable and remove the laser unit.
CHAPTER 4 ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT
1. If Main PCB ASSY is Replaced
Details post-replacement steps: firmware installation, initialization, and settings.
1.1 Installing Firmware
Instructions for checking and installing firmware using USB flash memory or a computer.
1.2 EEPROM Initialization (Function code 01)
Procedure for initializing the EEPROM of the Main PCB ASSY using function code 01.
1.5 Setting the Serial Number (Function code 80)
Steps to set the machine's serial number using maintenance mode or a service tool.
1.8 Touch Panel Adjustment (Function code 61)
Procedure for adjusting the detection area on the touch panel.
2.1 Density and Registration Sensor Adjustments (Function code 73)
Steps for performing continuous adjustments of density and registration sensors.
8. Laser Unit Replacement
Procedures required after replacing the laser unit, including adjustments and counter resets.
9. Fuser Unit/PF Kit Replacement
Actions required after replacing the fuser unit or PF kits, including counter resets.
CHAPTER 5 SERVICE FUNCTIONS
1. Maintenance Mode
Introduction to the maintenance mode for checking, setting, and adjusting machine functions.
1.1 How to Enter the Maintenance Mode
Instructions on entering the maintenance mode for service personnel and end users.
1.2 List of Maintenance-mode Functions
A comprehensive list of all maintenance functions with corresponding function codes and references.
1.3 Detailed Description of Maintenance-mode Functions
Detailed explanations of various maintenance functions, including EEPROM initialization.
1.3.21 Sensitivity Adjustment of Density Sensor (Function code 72)
Procedure for adjusting the density sensor sensitivity.
1.3.22 Continuous Adjustments of Density and Registration Sensor (Function code 73)
Performs consecutive adjustments for density, bias voltage, and color registration.
1.3.29 Reset Counters for Parts (Function code 88)
Resets replacement counters for various parts after replacement.
2.1 Toner Manual Reset Function
Manually resets toner cartridge recognition and life display.
2.2 Drum Cleaning
Attaches a cleaning sheet to the drum unit to perform drum cleaning.
CHAPTER 6 WIRING DIAGRAM
1. Wiring Diagram
Provides a detailed wiring diagram showing component interconnections.
CHAPTER 7 PERIODICAL MAINTENANCE
1. Safety Precautions for Maintenance
Crucial safety warnings and precautions to follow during periodical maintenance.
2.1 Procedures to Replace Periodical Replacement Parts
General preparation steps and procedures for replacing common wear parts.
2.1.1 Fuser Unit Replacement
Step-by-step guide for removing and replacing the fuser unit.
2.1.2 Laser Unit Replacement
Instructions for removing and replacing the laser unit.
2.1.3 PF Kit 1 Replacement
Procedure for replacing the PF kit 1 component.
2.1.4 PF Kit 2 Replacement
Procedure for replacing the PF kit 2 component.
2.1.5 PF Kit MP Replacement
Procedure for replacing the PF kit MP component.
REGULATION
Declaration of Conformity (Europe only)
Statement of conformity with EU directives and regulations for products sold in Europe.
IEC60825-1:2007 Specification
Details the product's compliance with IEC60825-1 laser safety standards.
Federal Communications Commission (FCC) Declaration of Conformity
FCC compliance statement for USA, including operating conditions and interference guidelines.
RF Exposure Notice (USA or Canada only)
Information regarding FCC/IC radiation exposure limits and installation guidelines.
Laser safety (For 110-120V Models Only)
Laser safety certification and warnings for 110-120V models.
SAFETY INFORMATION
Definitions of Warnings, Cautions, Notes and Memos
Explains the meaning of various safety marks and conventions used in the manual.
To Use the Machine Safely
Provides essential safety instructions for operating and maintaining the machine.
Hot Surface Warning
Warns about extremely hot internal parts after use and advises caution when touching them.
APPENDIX 1 SERIAL NUMBERING SYSTEM
Serial number labels for the printer itself
Illustrates the location and format of serial number labels on the printer.
APPENDIX 2 DELETION OF USER SETTING INFORMATION
Operating Procedure for Factory Reset
Procedure to restore the machine to factory default settings by deleting user information.
APPENDIX 3 INSTALLING THE MAINTENANCE PRINTER DRIVER
Windows XP Driver Installation
Steps for installing the Brother Maintenance USB Printer driver on Windows XP.
Windows Vista/7/8/8.1 Driver Installation
Instructions for installing the maintenance printer driver on Windows Vista, 7, 8, and 8.1.
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