BROTHER HL-5240, HL-5240L, HL-5250DN, HL-5270DN, HL-5280DW, Service Manual
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This BROTHER HL-5240, HL-5240L, HL-5250DN, HL-5270DN, HL-5280DW Service Manual provides detailed diagrams, pictures, and comprehensive procedures for diagnosing and repairing your BROTHER photocopier. Whether you're a professional mechanic or a DIY enthusiast, this manual is a valuable resource.
The manual includes the following chapters:
REGULATION
SAFETY INFORMATION
CHAPTER 1. GENERAL
FEATURES
PARTS NAMES AND FUNCTIONS
Overview
Control Panel
SPECIFICATIONS
Printing
Functions
Electronics and Mechanics
Service Information
Network Connectivity
Paper
Paper handling
Media specifications
Printable Area
PCL5e/EPSON/IBM emulation
PCL6 emulation
Print Speeds with Various Settings
Toner Cartridge Weight Information
SERIAL NO. DESCRIPTIONS
CHAPTER 2. THEORY OF OPERATION
OVERALL
General Block Diagram
ELECTRONICS
General Block Diagram
Main PCB Block Diagram
Main PCB
CPU
USB interface (2.0 High Speed)
IEEE 1284 interface
Network interface
ROM
SDRAM
Optional RAM
EEPROM
Reset circuit
Panel I/O
Video I/O
Power supply
Wireless LAN
Power Supply
Low-voltage power supply
High-voltage power supply
MECHANICS
Overview of Printing Mechanism
Overview of Gear
Paper Transfer
Paper supply
Paper registration
Drum unit
Developing
Fixing stage
Paper eject
Duplex printing (HL-5250DN/5270DN/5280DW)
Paper feeding from the MP tray
LT tray
Toner Cartridge
Toner life end mode
New toner detection mechanism
Counter reset during indication of "Toner Life End"
Print Process
Charging
Exposure stage
Transfer
Sensors
Heat Control of Fuser Unit
CHAPTER 3. PERIODIC MAINTENANCE
CONSUMABLE PARTS
Toner Cartridge
Drum Unit
PERIODICAL REPLACEMENT PARTS
Periodical Replacement Parts
Procedures to Replace Periodical Replacement Parts
Fuser unit and laser unit
Paper feeding kit for tray 1, 2, 3
Paper feeding kit for MP tray
PERIODICAL CLEANING
Cleaning the Inside of the Printer
Cleaning the Corona Wire
CHAPTER 4. TROUBLESHOOTING
INTRODUCTION
Initial Check
Warnings for Maintenance Work
Identify the Problem
ERROR MESSAGE
Operator Calls
Operator calls for HL-5240/5250DN
Operator calls for HL-5270DN/5280DW
Service Calls
Service calls for HL-5240/5250DN
Service calls for HL-5270DN/5280DW
Error Message in the Status Monitor
Error Message Printouts
PAPER PROBLEMS
Paper Loading Problems
Paper Jams
Paper jams and how to clear them for HL-5240/5250DN
Paper jams and how to clear them for HL-5270DN/5280DW
Causes & countermeasures
Paper Feeding Problems
SOFTWARE SETTING PROBLEMS
MALFUNCTIONS
IMAGE DEFECTS
Image Defect Examples
Diameter of Rollers
Troubleshooting Image Defect
Location of Grounding Contacts
Drum unit
Printer body & Paper tray
INCORRECT PRINTOUT
NETWORK PROBLEM
Installation Problem
Printing Problem
Protocol-Specific Troubleshooting
Wireless Network Troubleshooting
CHAPTER 5. DISASSEMBLY AND REASSEMBLY
SAFETY PRECAUTIONS
PACKING
SCREW TORQUE LIST
HARNESS ROUTING
LUBRICATION
DISASSEMBLY FLOW
DISASSEMBLY PROCEDURE
AC Cord
Drum/Toner ASSY
DX Feed ASSY
Paper Tray
Back Cover
DX Blank Cover (For HL-5240)
CHAPTER 6. ADJUSTMENTS AND UPDATING OF SETTINGS, REQUIRED AFTER PARTS REPLACEMENT
IF YOU REPLACE THE MAIN PCB
IF YOU REPLACE THE PERIODICAL MAINTENANCE PARTS
CHAPTER 7. SERVICE SUPPORT SOFTWARE
CONTROL PANEL
Users Mode
User Maintenance Mode
Service Mode
HIDDEN FUNCTION MENUS
Professional Menu
Reset Parts Life Menu
Service Menu
NVRAM DEFAULT VALUE
APPENDIX
MAIN PCB CIRCUIT DIAGRAM
LOW-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM (100V, 200V)
