Epson LQ-570e Service Manual page 7

EPSON LQ-570e/LQ-580
2.3.2 Input and Output Specification .................................................. 50
2.3.3 C293MAIN Board Circuit ........................................................... 52
2.3.3.1 Main Components .............................................................. 53
2.3.3.2 Main Circuits ....................................................................... 54
2.3.4 C293 PNL Board Circuit ............................................................ 56
2.3.4.1 Switch Port ......................................................................... 56
2.3.4.2 LED Port ............................................................................. 56
Chapter 3 Troubleshooting
3.1 Overview ........................................................................................... 58
3.1.1 Main Component Checking Point .............................................. 58
3.1.2 Error .......................................................................................... 60
3.2 UNIT LEVEL TROUBLESHOOTING ................................................ 61
3.3 Unit Repairing of the Power Supply Board ................................... 65
3.4 Unit Repairing of the MAIN Board .................................................. 67
3.5 Repairing the Printer Mechanism .................................................. 68
Chapter 4 Disassembly and Assembly
4.1 Overview ........................................................................................... 71
4.1.1 Disassembly Precautions .......................................................... 71
4.1.2 Tools and Instruments ............................................................... 71
4.1.3 Service Check After Repair ....................................................... 72
4.1.4 Specifications for Screws .......................................................... 73
4.2 Disassembly and Assembly ........................................................... 74
4.2.1 Pre-disassembly Procedures .................................................... 75
4.2.1.1 Front Cover Assembly Removal ......................................... 75
4.2.1.2 EJ (Paper Eject) Assembly Removal .................................. 76
4.2.1.3 Tractor Assembly Removal ................................................ 76
4.2.2 Printhead Removal .................................................................... 77
4.2.3 HP (Home Position) Detector Removal ..................................... 78
4.2.4 Upper Housing Assembly Removal ........................................... 79
4.2.5 C293 MAIN Board Removal ...................................................... 80
4.2.6 C293 PSB/PSE Board Removal ................................................ 82
4.2.7 Printer Mechanism Removal ..................................................... 83
4.2.8 Platen Removal ......................................................................... 84
4.2.9 Printer Mechanism Disassembly ............................................... 85
4.2.9.1 CR Motor Removal ............................................................. 85
4.2.9.2 PF Motor Removal ............................................................. 85
4.2.9.3 PF Gear Train Disassembly ............................................... 86
4.2.9.4 PG (Platen Gap) Detector Removal ................................... 87
4.2.9.5 Release Detector Removal ................................................ 87
4.2.9.6 Front PE (Paper End) Detector Removal ........................... 88
4.2.9.7 Front PE (Paper End) Detector Removal ........................... 88
4.2.9.8 Carriage Assembly Removal .............................................. 89
4.2.9.9 Rear Paper Guide Assembly Removal ............................... 91
4.2.9.10 Ribbon Drive (RD) Assembly Removal ............................ 92
Chapter 5 Adjustment
5.1 Adjustment Overview ...................................................................... 94
5.1.1 Required Adjustment ................................................................. 94
5.1.2 Adjustment Tools ...................................................................... 94
5.2 Adjustment and Resetting the Printer ........................................... 95
5.2.1 Parallel Adjustment ................................................................... 95
5.2.2 Platen Gap Adjustment ............................................................. 96
5.2.3 Factory Setting .......................................................................... 97
5.2.4 Bi-D Adjustment ........................................................................ 99
5.2.4.1 Bi-d Specifications .............................................................. 99
5.2.4.2 Bi-d Adjustment Method ..................................................... 99
Chapter 6 Maintenance
6.1 Preventive Maintenance ............................................................... 102
6.2 Lubrication ..................................................................................... 103
Chapter 7 Appendix
7.1 Connector summary ..................................................................... 107
7.2 EEPROM Address Map ................................................................. 112
7.3 Components Layout ...................................................................... 118
7.4 Exploded Diagram ......................................................................... 121
7.5 Parts List ........................................................................................ 123
7.6 Circuit Diagrams ............................................................................ 126
Revision C
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