Service manual

Chapter 3 Troubleshooting
3.1 Overview ........................................................................................... 56
3.2 Troubleshooting .............................................................................. 57
3.2.1 Initialization Check .................................................................... 57
3.2.2 Check Performance By Self-Check Function ............................ 57
3.2.2.1 Indicator LED ...................................................................... 57
3.2.3 Identify Problems From Symptoms ........................................... 58
3.2.4 Unit and Parts Check ................................................................ 61
3.2.4.1 Printhead Check ................................................................. 61
3.2.4.2 Motor Check ....................................................................... 62
3.2.4.3 Sensor Check ..................................................................... 62
3.2.4.4 Printhead Driver Check ...................................................... 63
Chapter 4 Disassembly and Assembly
4.1 Overview ........................................................................................... 65
4.1.1 Precautions ............................................................................... 65
4.1.2 Tools .......................................................................................... 65
4.1.3 Service Checks After Repair ..................................................... 66
4.2 Disassembly and Assembly ........................................................... 67
4.2.1 Printhead Removal .................................................................... 68
4.2.2 Upper Housing Removal ........................................................... 69
4.2.3 Printer Mechanism Removal ..................................................... 70
4.2.4 Board Assembly and Panel Removal ........................................ 71
4.2.5 C294MAIN Board Assembly Removal ...................................... 71
4.2.6 P/S Board Assembly Removal .................................................. 72
4.2.7 Printer Mechanism Disassembly ............................................... 73
4.2.7.1 CR Motor Assembly Removal ............................................ 73
4.2.7.2 Platen Removal .................................................................. 74
4.2.7.3 Carriage Unit Removal ....................................................... 75
4.2.7.4 Ribbon Feed Mechanism Removal .................................... 76
4.2.7.5 RPE Sensor Removal ........................................................ 77
4.2.7.6 BPE Sensor Removal ......................................................... 77
4.2.7.7 HP Sensor Removal ........................................................... 77
4.2.7.8 PG Sensor Removal ........................................................... 78
4.2.7.9 Release Lever Position Sensor Removal ........................... 78
4.2.7.10 PF Motor Assembly Removal ........................................... 79
4.2.7.11 Paper Feed Mechanism Disassembly .............................. 79
4.2.7.12 Paper Guide Removal ...................................................... 81
Chapter 5 Adjustment
5.1 Overview .......................................................................................... 83
5.1.1 Platen Gap Adjustment ............................................................. 83
5.1.2 Bi-D Adjustment ........................................................................ 84
Chapter 6 Maintenance
6.1 Maintenance ..................................................................................... 89
6.1.1 Cleaning .................................................................................... 89
6.1.2 Lubrication ................................................................................. 89
Chapter 7 Appendix
7.1 Connector Summary ....................................................................... 94
7.2 Parts List .......................................................................................... 97
7.3 Exploded Diagrams ....................................................................... 100
7.4 Component Layout ....................................................................... 102
7.5 Circuit Schematics ........................................................................ 103