Epson Service Manual LQ 200

• FRONT MATTER
• CONTENTS
• CHAP 1-GENERAL DESCRIPTION
  • Features
  • Specifications
    • Hardware Specifications
    • Firmware Specifications (ESC/P)
  • Parallel Interface
  • DIP Switches and Jumpers
    • DIP Switches
    • Jumpers
  • Operating Instructions
    • SelecType
    • Self Test
    • Demonstration
    • Hexadecimal Dump Function
    • Bit Image Printing
    • Error Conditions
    • Buzzer Operation
    • Printer Initialization
    • Default Values
    • Head Adjust Lever
    • Printhead Protection During Heavy Duty Printing
  • Main Components
    • C064 MAIN PCB
    • Control Panel PCB
    • PEBFIL-II PCB
    • Transformer
    • Model 5Cl0 Printer Mechanism
    • Housing
• CHAP 2-PRINCIPLES OF OPERATION
  • Overview
    • Connector Summary
    • Overview of Printer Mechanism Operation
    • Circuit Overview
    • Firmware Overview
  • Principles of Operation
    • Power Supply Circuit
    • Reset Circuit
    • Address Decoder and Bank Register
    • Carriage Operation
    • Paper Feeding
    • Printhead
    • A/D Converter Circuit
    • Host Interface
    • Ribbon Feed Mechanism
• CHAP 3-DISASSEMBLY AND ASSEMBLY
  • General Repair Information
    • Tools
    • Small Parts
    • Service Checklist
  • Disassembly and Assembly
    • Removing the Printhead
    • Removing the Case
    • Removing the Circuit Boards
    • Removing the Printer Mechanism
    • Disassembling the Printer Mechanism
• CHAP 4-ADJUSTMENT
  • Adjustment Overview
  • Adjusting the Platen Gap
  • Adjusting the Bidirectional Printing Alignment
    • VR1 and VR2 Specifications
    • Adjustment Procedures
• CHAP 5-TROUBLESHOOTING
  • Procedure for Troubleshooting the Printer
  • Unit Replacement
  • Repair of the Main Board
  • Repair of the Printer Mechanism
• CHAP 6-MAINTENANCE
  • Preventive Maintenance
  • Lubrication and Adhesive Application
• APPENDIX
  • Connector Summary
  • Circuit Diagrams
  • Circuit Board Component Layout
  • Exploded Diagrams
  • Case Outline Drawings