Epson LQ-200 - Impact Printer Manuals

Manuals and User Guides for Epson LQ-200 - Impact Printer. We have 9 Epson LQ-200 - Impact Printer manuals available for free PDF download: Service Manual, Product Support Bulletin, Technical Brief

Epson LQ-200 - Impact Printer Service Manual (193 pages)

Brand: Epson | Category: Printer | Size: 4 MB

Chapter 1 General Description

4
- Fcc Compliance Statement for American Users
  2
- For Canadian Users
  2
- Copyright Notice
  3
- Table of Contents
  4
- Features
  9
- Specifications
  11
- Parallel Interface
  22
- Table 1-8. Connector Pin Assignments and Signal Functions
  23
- DIP Switches and Jumpers
  26
- Operating Instructions
  29
  - Selectype
    29
  - Self Test
    29
  - Demonstration
    30
  - Hexadecimal Dump Function
    31
  - Bit Image Printing
    32
  - Table 1-16. Print Density
    32
  - Table 1-17. Bit Image Printing
    32
  - Error Conditions
    33
  - Buzzer Operation
    33
  - Printer Initialization
    34
    
    Hardware Initialization
    34
    
    Software Initialization
    34
  - Default Values
    35
  - Head Adjust Lever
    36
  - Table 1-18. Head Adjust Lever
    36
  - Printhead Protection During Heavy Duty Printing
    37
- Main Components
  37
  - Co64 Main Pcb
    38
  - Control Panel PCB
    38
    
    C064 Main Pcb
    38
  - Pebfil-II Pcb
    39
  - Transformer
    39
  - Model 5Clo Printer Mechanism
    40
    
    Model 5C10 Printer Mechanism
    40
  - Housing
    41
  - Figure 1-17. Housing
    41
Chapter 2 Principles of Operation

42
- Figure 1-15. Transformer
  42
- Overview
  45
  - Principles of Operation
    45
  - Connector Summary
    45
  - Overview of Printer Mechanism Operation
    47
  - Circuit Overview
    51
  - Firmware Overview
    52
- Principles of Operation
  53
  - Power Supply Circuit
    53
  - Chopper-Type Switching Regulator Circuit
    55
  - Filter Circuit
    57
  - Rectifier and Smoothing Circuit
    59
  - Pulse Width Modulation Circuit
    63
  - VX Voltage Supply Circuit
    68
  - Reset Circuit
    69
  - Init Signal Input from Cn
    70
  - Address Decoder and Bank Register
    73
  - Carriage Operation
    74
  - Carriage Mechanism
    74
  - Carriage Motor Drive Circuit Block Diagram
    75
  - Carriage Motor Drive Circuit
    77
  - Paper Feeding
    87
  - Paper Feed Motor Software Control
    90
  - Printhead
    91
  - Printhead Drive Circuit Block Diagram
    92
  - Printhead Drive Circuit
    94
  - Printhead Software Control
    95
  - A/D Converter Circuit
    96
  - Host Interface
    99
  - Ribbon Feed Mechanism
    100
Chapter 3 Disassembly and Assembly

102
- Tools
  105
  - Small Parts
    106
  - Service Checklist
    108
  - Removing the Printhead
    109
- Disassembly and Assembly
  109
  - Removing the Printhead
    110
    
    Removing the Upper Case
    111
    
    Removing the Control Panel
    113
  - Removing the Circuit Boards
    114
    
    Removing the C064 MAIN Board
    114
    
    Removing the PEBFIL-II Board
    115
    
    Removing the Transformer
    116
  - Removing the Printer Mechanism
    117
    
    Removing the Platen Unit and the Paper Guide
    118
    
    Removing the Printer Mechanism
    120
    
    Adjustment Required
    120
  - Disassembling the Printer Mechanism
    122
    
    Removing the Paper Feed Mechanism
    122
    
    Removing the Paper Feed Motor
    126
    
    Removing the Paper End Sensor
    127
    
    Disassembling the Platen Unit
    127
    
    Removing the Carriage Unit
    129
    
    Removing the Carriage Motor .T
    133
    
    Removing the Home Position Sensor
    135
    
    Disassembling the Ribbon Feed Mechanism
    136
    
    Disassembling the Tractor Unit
    137
- Removing the Case
  109
Chapter 4 Adjustment

141
- Adjusting the Platen Gap
  142
- Adjustment Overview
  142
- Adjusting the Bidirectional Printing Alignment
  145
  - VR1 and VR2 Specifications
    146
  - Adjustment Procedures
    147
    
    Draft Mode
    148
    
    LQ Mode
    149
Chapter 5 Troubleshooting

151
- Chapter 4
  
  151
  - Procedure for Troubleshooting the Printer
    151
  - Repair of the Main Board
    151
  - Repair of the Printer Mechanism
    151
  - Unit Replacement
    151
- Procedure for Troubleshooting the Printer
  152
- Troubleshooting 5
  152
- Unit Replacement
  152
- Repair of the Main Board
  161
- Repair of the Printer Mechanism
  168
  - Preventive Maintenance
    171
  - Lubrication and Adhesive Application
    171
- Chapter 6
  
  172
  - Preventive Maintenance
    172
    
    Lubrication and Adhesive Application
    172
    
    Connector Summary
    177
    
    Circuit Diagrams
    179
    
    Exploded Diagrams
    184
    
    Case Outline Drawings
    187
    
    Case Outline Drawings
    188