Document Outline

• COVER
• CONTENTS
• NOTICE
• CHAPTER 1 GENERAL DESCRIPTION
  • 1.1 General description
  • 1.2 Model name notation
  • 1.3 Instructions apply models
• CHAPTER 2 THEORY OF OPERATION
  • 2.1 Block Diagram
  • 2.2 Main Logic Board
    • 2.2.1 Interface Circuit
    • 2.2.2 Print Head Driving Circuit
    • 2.2.3 Print Head Temperature Detection Circuit
    • 2.2.4 Carriage Motor Driving Circuit
    • 2.2.5 Paper Feed Motor Driving Circuit
    • 2.2.6 Power On Reset Circuit
    • 2.2.7 Protection Circuit
  • 2.3 Power Supply Unit
    • 2.3.1 Fuse Board
  • 2.4 Mechanism
    • 2.4.1 Print Head Mechanism
    • 2.4.2 Print Head Carriage Mechanism
    • 2.4.3 Paper Feed Mechanism
    • 2.4.4 Ink Ribbon Feed Mechanism
    • 2.4.5 Detectors
• CHAPTER 3 ADJUSTMENT
  • 3.1 Tools and Measuring Instruments
  • 3.2 Adjusting the Gap between the Print Head and the Platen
    • 3.2.1 Measuring the Gap between the Print Head and the Platen
    • 3.2.2 Adjusting the Gap between the Print Head and the Platen
  • 3.3 Adjusting the Print Speed
  • 3.4 Adjusting the Column Displacement for Bi-Directional Printing
    • 3.4.1 Adjustment A
    • 3.4.2 Adjustment B
• CHAPTER 4 PARTS REPLACEMENT
  • 4.1 Upper Case Unit
  • 4.2 Printer Mechanism
  • 4.3 Control Panel Board
  • 4.4 Main Logic Board
  • 4.5 Power Supply Unit
  • 4.6 Fuses
  • 4.7 Print Head
  • 4.8 Drive Shaft Unit
  • 4.9 Terminal Board Unit
  • 4.10 Carriage Motor Unit
  • 4.11 Paper Feed Motor Unit
  • 4.12 Home Position Detector Board Unit
  • 4.13 Gears
• CHAPTER 5 MAINTENANCE AND LUBRICATION
  • 5.1 Maintenance
    • 5.1.1 Cleaning
    • 5.1.2 Checks
  • 5.2 Lubrication
    • 5.2.1 Type of oil
    • 5.2.2 Lubrication method
    • 5.2.3 Lubrication locations
  • 5.3 Screw Sealing
• CHAPTER 6 PARTS LIST
  • HOW TO USE PARTS LIST
  • 6.1 Printer Assembly
    • 6.1.1 Assembly Drawing
    • 6.1.2 Parts List
  • 6.2 Printer Mechanism
    • 6.2.1 Assembly Drawing
    • 6.2.2 Parts List
  • 6.3 Sub-assembly
    • 6.3.1 Upper Case Unit
    • 6.3.2 Lower Case Unit
  • 6.4 Wiring Schematic of Printer
    • 6.4.1 For Serial Interface
    • 6.4.2 For Parallel Interface
  • 6.5 Main Logic Board
    • 6.5.1 Serial Interface
      • 6.5.1.1 Circuit Diagram
      • 6.5.1.2 Component Layout
      • 6.5.1.3 Parts List
    • 6.5.2 For Parallel Interface
      • 6.5.2.1 Circuit Diagram
      • 6.5.2.2 Component Layout
      • 6.5.2.3 Parts List
  • 6.6 Control Panel Board
    • 6.6.1 Circuit Diagram
    • 6.6.2 Component Layout
    • 6.6.3 Parts List
  • 6.7 Power Supply Unit (Except for H.K.)
    • 6.7.1 Circuit Diagram
    • 6.7.2 Component Layout
    • 6.7.3 Parts List
  • 6.8 Power Supply Unit (For H.K.)
    • 6.8.1 Circuit Diagram
    • 6.8.2 Parts List
  • 6.9 Terminal Board
    • 6.9.1 Circuit Diagram
    • 6.9.2 Component List
    • 6.9.3 Parts List
  • 6.10 Home Position Detector Board
    • 6.10.1 Circuit Diagram
    • 6.10.2 Component Layout
    • 6.10.3 Parts List
  • 6.11 RS422 Interface Board (BD320K): option
    • 6.11.1 Circuit Diagram
    • 6.11.2 Component Layout
    • 6.11.3 Parts List
  • 6.12 Current loop Board (BD320L): option
    • 6.12.1 Circuit Diagram
    • 6.12.2 Component Layout
    • 6.12.3 Parts List