BROTHER HL-5240, HL-5240L, HL-5250DN, HL-5270DN, HL-5280DW, Service Manual

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)
  • HIGH-VOLTAGE POWER SUPPLY PCB CIRCUIT DIAGRAM
  • POINT TO POINT CONNECTION DIAGRAM
  • GEAR LAYOUT DRAWING
  • READMARKS
  • LOCATION OF THE FERRITE CORE
  • HL-5240L

Number of pages: 337