User Manuals: Epson LG1-1070 Dot Matrix Printer

Manuals and User Guides for Epson LG1-1070 Dot Matrix Printer. We have 1 Epson LG1-1070 Dot Matrix Printer manual available for free PDF download: Service Manual

Epson LG1-1070 Service Manual

Epson LG1-1070 Service Manual (307 pages)

TERMINAL PRINTER

Brand: Epson | Category: Printer | Size: 6.32 MB

Table of Contents

Table of Contents

6
- General Description
  7
  - List of Figures
    8
  - List of Tables
    8
- Features
  9
- Figure 1-1. Exterior View of the LQ-570/1070
  10
- Optional Units
  10
- Figure 1-2. Pin Configuration
  11
- Specifications
  11
- Interface Overview
  22
  - P a R a L L E L I N T E R F a C
    22
    
    Data Transmission Timing
    22
    
    Table 1-11. Connector Pin Assignments and Signal Functions
    22
- Control Panel
  24
- Operating Instructions
  28
  - Self-Test
    28
  - Hexadecimal Dump Function
    28
  - Paper-Out Detection and Forms Override Function
    29
  - Error Conditions
    29
    
    Buzzer Operation
    29
    
    Initialization
    29
  - Default Values
    30
  - Sheet Loading and Sheet Ejection
    30
    
    Tear-Off Function
    31
    
    Lever Positions
    32
  - Printer Protection for Heavy-Duty Printing
    33
- Main Components
  34
Operation Principles

37
- Chapter 1
  
  37
- Chapter 2 Operation Principles
  
  37
  - Overview of Printer Mechanism Operation
    39
    
    Printhead Mechanism
    39
    
    Carriage Movement Mechanism
    40
    
    Paper Advance Mechanisms
    41
    
    Paper Feed Mechanism
    41
    
    Paper Insertion Entrances
    44
    
    Ribbon Advance Mechanism
    48
  - Power Supply Operation
    49
    
    Supply Circuit Operation
    49
    
    Power Supply Board
    50
    
    C062 MAIN Board
    51
  - Control Circuit Operation
    51
    
    Control Circuit Operation Overview
    51
    
    Reset Circuit
    53
    
    Sensor Circuits
    54
    
    MOTOR, CR Drive Circuit
    55
    
    MOTOR, PF Drive Circuit
    56
    
    Printhead Drive Circuit
    57
Disassembly and Assembly

59
Adjustments

81
- Adjusting the Printer Mechanism
  82
  - MOTOR, CR Backlash Adjustment
    82
  - Platen Gap Adjustment
    83
- Bidirectional Print Position Adjustment
  85
  - Bidirectional Print Position Adjustment Procedure
    85
  - Overview of Bidirectional Print Position Adjustment
    85
- Circuit Adjustment
  87
  - Adjustment Process
    87
  - Repair by Unit Replacement
    90
  - Repair of the Main Board
    102
  - Repair of the Printer Mechanism
    105
- Chapter 3
  
  106
  - Adjustments
    106
- Chapter 4
  
  108
- Chapter 5
  
  108
  - Maintenance
    108
    
    Lubrication and Adhesive Application
    109
    
    Preventive Maintenance
    109
    
    Control Panel
    116
    
    Service Manual
    138
General Description

145
- Specifications for Cut Sheets
  146
  - Features
    147
  - Specifications
    149
    
    Hardware Specifications
    149
    
    Firmware Specifications
    155
  - Interface Overview
    160
    
    Parallel Interface
    160
  - Control Panel
    162
  - Dip Switches and Jumper Setting
    164
    
    DIP Switch Settings
    164
    
    Jumper Setting
    165
  - Hexadecimal Dump Function
    166
  - Operating Instructions
    166
    
    Self-Test
    166
    
    Buzzer Operation
    167
    
    Error Conditions
    167
    
    Paper-Out Detection and Forms Override Function
    167
    
    Printer Initialization
    167
    
    Default Values
    168
    
    Sheet Loading and Sheet Ejection
    168
    
    Tear-Off Function
    169
    
    Printer Protection for Heavy-Duty Printing
    171
  - Main Components
    172
    
    C062 MAIN Board (Main Control Circuit Board)
    172
    
    C062 PNL Board
    173
    
    C062 PNL Board (Control Panel Circuit Board)
    173
    
    C062 PSB/PSE Board (Power Supply Circuit Board)
    173
    
    Housing
    174
    
    Printer Mechanism (M-5E10/M-5E60)
    174
Operation Principles

175
- Overview of Printer Mechanism Operation
  177
  - Carriage Movement Mechanism
    178
  - Paper Feed Mechanism
    179
    
    Paper Advance Mechanisms
    179
    
    Paper Insertion Entrances
    182
  - Ribbon Advance Mechanism
    186
- Power Supply Operation
  187
  - Power Supply Overview
    187
  - Supply Circuit Operation
    187
- Control Circuit Operation
  189
  - Control Circuit Operation Overview
    189
  - Reset Circuit
    191
  - Sensor Circuits
    192
  - MOTOR, CR Drive Circuit
    193
  - Printhead Drive Circuit
    195
  - Parallel Interface Circuit
    196
  - EEPROM Control Circuit
    196
Disassembly and Assembly

197
- Overview
  199
  - Precautions for Disassembling the Printer
    199
  - Tools
    199
  - Service Checks after Repair
    200
  - Specifications for Screws
    201
- Disassembly and Assembly
  202
  - Changing the Printhead
    203
  - Removing the Printer Case
    204
    
    Removing the HOUSING ASSY., UPPER
    204
  - Removing the Circuit Boards
    205
    
    Removing the BOARD ASSY., MAIN
    205
    
    Removing the BOARD ASSY., PANEL (C062 PNL Board)
    206
    
    Removing the BOARD ASSY., POWER SUPPLY
    206
  - Removing the PRINTER MECHANISM
    207
  - Disassembling the PRINTER MECHANISM
    208
    
    Removing the Motor, CR
    208
    
    Removing the Motor, PF
    209
    
    Removing the Carriage
    210
    
    Removing the PLATEN
    211
    
    Removing and Disassembling the FRAME, MAIN, RIGHT
    212
    
    Removing and Disassembling the PAPER GUIDE
    213
    
    Removing the DETECTOR ASSY., HP
    215
    
    Removing the DETECTOR ASSY., PE, REAR
    215
    
    Removing the DETECTOR ASSY., PE, FRONT
    216
    
    Removing the DETECTOR ASSY., PLATEN
    216
    
    Disassembling the TRACTOR ASSY
    217
    
    Arranging the Cables
    218
Adjustments

219
- Adjusting the Printer Mechanism
  220
  - MOTOR, CR Backlash Adjustment
    220
  - Platen Gap Adjustment
    221
- Bidirectional Print Position Adjustment
  223
  - Overview of Bidirectional Print Position Adjustment
    223
  - Bidirectional Print Position Adjustment Procedure
    223
- Circuit Adjustment
  225
  - Adjustment Process
    225
  - Board Assy
    253
Appendix B the Lq-570+/1070+

276
- Differences between the LQ-570+/1070+ and the LQ-570/1070
  278
  - Important Component Differences
    278
  - Faster Print Speeds
    278
  - Character Table Differences
    280
  - Jumper Differences
    281
  - Weight Difference for Cut Sheet Carbonless Duplicating Paper
    281
  - Power Consumption
    281
- 1070+ Control Circuit Operation
  283
  - Reset Circuit
    286
  - Sensor Circuits
    288
  - CR Motor Drive Circuit
    289
  - PF Motor Drive Circuit
    290
  - Printhead Drive Circuit
    291
- Disassembly Procedures Unique to the LQ-570+/1070
  292
  - Removing the Cl07 MAIN Board Assembly
    292
- Adjustments
  296
  - Circuit Adjustment
    296
- Troubleshooting
  297
  - Error Codes
    298
- Reference Materials
  300

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