Epson Stylus Color C70, Service Manual

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2.2.1 C424 PSB/PSE board ................................................................................ 51
2.2.2 C424 MAIN-B Board ................................................................................ 54
2.2.2.1 Main elements ................................................................................... 55
2.2.2.2 Printhead Driver Circuit .................................................................... 56
2.2.2.3 CR / PF Motor (PF/ PUMP/ ASF Motor) Driver Circuit .................. 57
2.2.2.4 Reset Circuit ...................................................................................... 57
2.2.2.5 EEPROM Control Circuit ................................................................. 58
2.2.2.6 Sensor Circuit .................................................................................... 58
Chapter 3 Troubleshooting
3.1 Overview ............................................................................................................ 61
3.1.1 Communication Error ................................................................................ 62
3.1.2 Too Late Throughput ................................................................................. 62
3.1.3 Status Monitor does not operate ................................................................ 63
3.1.4 Troubleshooting with LED Error Indications ............................................ 64
3.1.4.1 Remedy when a paper out, double feed or paper jam error
occurs ................................................................................................. 66
3.1.4.2 Remedies for No I/C and Ink Out Errors .......................................... 71
3.1.4.3 Countermeasures when an Ink Low indication appears. ................... 75
3.1.4.4 Remedies for the Maintenance Error ................................................. 75
3.1.4.5 Remedies for Fatal Error ................................................................... 76
3.1.5 Isolating the Faulty Part on the Power Supply Board ................................ 79
3.1.6 Isolating the Faulty Part according to the Phenomenon ............................ 82
3.1.6.1 PF Motor Driver Abnormal 1 ............................................................ 83
3.1.6.2 ASF Driver Abnormal 1 .................................................................... 84
3.1.6.3 Unexpected Ink Out Error 1 (During Print Operation) ..................... 85
3.1.6.4 PF Motor Driver Abnormal 2 ............................................................ 86
3.1.6.5 Carriage Operation Abnormal ........................................................... 87
3.1.6.6 Dot Missing 1 .................................................................................... 89
3.1.6.7 Dot Missing 2 .................................................................................... 90
3.1.6.8 Dot Missing 3 .................................................................................... 92
3.1.6.9 Repair Handling Failure .................................................................... 93
3.1.6.10 ASF Driver Abnormal 2 .................................................................. 93
3.1.6.11 CR Motor Operation Abnormal ...................................................... 95
Chapter 4 Disassembly and Assembly
4.1 Overview ............................................................................................................ 97
4.1.1 Precautions ................................................................................................. 97
4.1.2 Tools .......................................................................................................... 98
4.1.3 Work Completion Check ........................................................................... 99
4.1.4 Screws ...................................................................................................... 100
4.2 Disassembly ..................................................................................................... 101
4.2.1 Housing Removal .................................................................................... 102
4.2.1.1 Printer Cover Removal .................................................................... 102
4.2.1.2 Stacker Assembly Removal ............................................................ 102
4.2.1.3 Upper Case Removal ....................................................................... 103
4.2.1.4 Rear Cover Removal ....................................................................... 104
4.2.1.5 Middle Housing Removal ............................................................... 104
4.2.1.6 Printer Mechanism Unit Removal ................................................... 105
4.2.1.7 Waste Ink Pad Removal .................................................................. 108
4.2.2 ASF Unit Removal .................................................................................. 108
4.2.3 Main Board Assembly Removal .............................................................. 110
4.2.4 Power Supply Board Assembly Removal ............................................... 111
4.2.5 Print Head / Ink System Unit Removal ................................................... 113
4.2.6 Carriage Unit / CR Guide Shaft Removal ............................................... 116
4.2.7 Front Paper Guide Removal .................................................................... 121
4.2.8 EJ Roller Unit Removal ........................................................................... 122
4.2.9 Motor Removal ........................................................................................ 123
4.2.9.1 PF Motor Removal .......................................................................... 123
4.2.9.2 CR Motor Removal ......................................................................... 124
4.2.10 PE Actuator Removal ............................................................................ 125
4.2.10.1 Encoder Unit Board Removal ....................................................... 125
4.2.11 PF Roller Unit Removal ........................................................................ 126
4.2.12 ASF Unit Disassembly .......................................................................... 127
4.2.12.1 ASF Assembly Points .................................................................... 132
4.2.13 Rotary Encoder Removal ....................................................................... 134
Chapter 5 Adjustment
5.1 Overview .......................................................................................................... 138
5.1.1 Conditions for Each Adjustment ............................................................. 138
5.2 Adjustment ...................................................................................................... 140
5.2.1 Setup the Adjustment Program ................................................................ 140
5.2.2 Head ID Input .......................................................................................... 141
5.2.3 Ink Charge ............................................................................................... 143
5.2.4 Head Angle Adjustment. ......................................................................... 144
5.2.5 Bi-D Adjustment ...................................................................................... 149
5.2.6 PF Adjustment ......................................................................................... 152