Epson LQ-305K Manuals

Manuals and User Guides for Epson LQ-305K. We have 1 Epson LQ-305K manual available for free PDF download: Service Manual

Epson LQ-305K Service Manual

Epson LQ-305K Service Manual (106 pages)

24 Pins Serial Impact Dot Matrix Printer

Brand: Epson | Category: Printer | Size: 4.28 MB

Table of Contents

Service Manual
1
About this Manual
4
Manual Configuration
4
Symbols Used in this Manual
4
Table of Contents
6
Chapter 1 Product Description

8
- Features
  9
- Specifications
  10
  - Physical Specification
    10
  - Printing Specification
    11
  - Paper Feeding
    14
  - Electrical Specification
    15
  - Environmental Condition
    15
  - Reliability
    15
  - Ribbon Cartridge
    15
  - Safety Approvals
    16
  - CE Marking
    16
  - Acoustic Noise
    16
- Interface
  17
- Operator Controls
  22
  - Operation Switches
    22
    
    Switches
    22
    
    Led
    23
    
    Buzzer
    23
  - Panel Functions
    24
    
    Usual Operation
    24
    
    Operation at Power-On
    24
    
    Default Setting
    24
    
    Bi-D. Adjustment
    26
  - Errors
    26
- Control Codes
  27
- Initialization
  27
- Paper
  28
  - Paper Specifications
    28
  - Printable Area
    31
- Accessories
  33
- Difference between LQ-300+ and LQ-305K
  34
Chapter 2 Operating Principles

35
- Overview
  36
- Printer Mechanism
  37
  - Printhead
    38
    
    Buzzer Function
    38
  - Carriage Mechanism
    39
    
    High Speed Skip Method
    41
  - Ribbon Mechanism
    41
    
    Ink Ribbon Shifting Mechanism
    41
    
    Color Ribbon Driving Mechanism (Option)
    41
  - Platen Gap Adjustment Mechanism
    43
  - Paper Feed Mechanism
    44
    
    Page Length Measurement
    45
  - Release Mechanism
    46
  - Other Special Functions
    46
    
    Energy Saving Mode
    46
    
    Quiet Mode
    46
- Electric Circuit Operating Principles
  47
  - C395MAIN Board
    47
  - C294PSB / C294PSE Board
    48
    
    Electric Circuit
    48
- Overview
  50
- Troubleshooting
  51
  - Initialization Check
    51
  - Check Performance by Self-Check Function
    51
    
    Indicator Leds
    51
  - Identify Problems from Symptoms
    52
  - Unit and Parts Check
    54
    
    Printhead Check
    55
    
    Motor Check
    56
    
    Sensor Check
    56
    
    Printhead Driver Check
    57
Chapter 4 Disassembly and Assembly

58
- Overview
  59
  - Precautions
    59
  - Tools
    59
  - Service Checks after Repair
    60
- Disassembly and Assembly
  61
  - Printhead Removal
    62
  - Upper Housing Removal
    63
  - Printer Mechanism Removal
    64
  - Board Assembly and Panel Removal
    65
  - C395 MAIN Board Assembly Removal
    65
  - C294PSB/PSE Board Assembly Removal
    66
  - Printer Mechanism Disassembly
    67
    
    CR Motor Assembly Removal
    67
    
    Platen Removal
    68
    
    Carriage Unit Removal
    69
    
    Ribbon Feed Mechanism Removal
    70
    
    RPE Sensor Removal
    71
    
    BPE Sensor Removal
    71
    
    HP Sensor Removal
    71
    
    PG Sensor Removal
    72
    
    Release Lever Position Sensor Removal
    72
    
    PF Motor Assembly Removal
    73
    
    Paper Feed Mechanism Disassembly
    73
    
    Paper Guide Removal
    75
Chapter 5 Adjustment

76
- Overview
  77
  - Platen Gap Adjustment
    77
  - Bi-D Adjustment
    78
Chapter 6 Maintenance

83
- Maintenance
  83
  - Cleaning
    83
  - Lubrication
    83
Chapter 7 Appendix

87
- Connector Summary
  88
- Parts List
  92
- Exploded Diagrams
  95
- Component Layout
  98
- Electric Circuit Schematics
  102

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