Epson Stylus Photo 895 Service Manual page 7

2.1.2 Printhead .................................................................................................... 32
2.1.2.1 Printing Process ................................................................................. 33
2.1.2.2 Printing Method ................................................................................. 34
2.1.3 Carriage Mechanism .................................................................................. 34
2.1.4 Paper Feeding Mechanism ......................................................................... 36
2.1.5 Paper Loading Mechanism (ASF Unit) ..................................................... 37
2.1.6 Ink System Mechanism .............................................................................. 41
2.1.6.1 Pump Unit & Wiper mechanism ....................................................... 41
2.1.6.2 Capping Mechanism .......................................................................... 42
2.2 Electrical Circuit Operating Principles .......................................................... 43
2.2.1 C408 PSE board ......................................................................................... 43
2.2.1.1 Process how 42VDC, 5VDC and 3.3VDC are generated ................. 44
2.2.1.2 Protection circuit ............................................................................... 45
2.2.1.3 PS Control Function .......................................................................... 45
2.2.1.4 Power saving mode ........................................................................... 45
2.2.2 C408 MAIN Board .................................................................................... 46
2.2.2.1 Main elements ................................................................................... 48
2.2.2.2 Printhead Driver Circuit .................................................................... 49
2.2.2.3 CR Motor Driver Circuit ................................................................... 50
2.2.2.4 PF Motor Driver Circuit .................................................................... 50
2.2.2.5 ASF Motor Drive Circuit .................................................................. 51
2.2.2.6 Reset and EEPROM circuits ............................................................. 51
2.2.2.7 Sensor Circuit .................................................................................... 52
Chapter 3 Troubleshooting
3.1 Overview ............................................................................................................ 54
3.2 Troubleshooting with LED Error Indications ............................................... 55
Chapter 4 Disassembly and Assembly
4.1 Overview ............................................................................................................ 68
4.1.1 Precautions ................................................................................................. 68
4.1.2 Tools .......................................................................................................... 70
4.1.3 Work Completion Check ........................................................................... 71
4.2 Disassembly ....................................................................................................... 72
4.2.1 Housing Removal ...................................................................................... 73
4.2.2 Operation Panel removal ........................................................................... 75
4.2.2.1 Printer Panel Board Removal ............................................................ 75
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4.2.2.2 Monochrome panel board removal ................................................... 77
4.2.3 Housing Lower Cover Removal ................................................................ 78
4.2.3.1 Housing Lower Cover Left Removal ................................................ 78
4.2.3.2 Housing Lower Cover Right Removal .............................................. 79
4.2.4 Printhead removal ...................................................................................... 79
4.2.5 CR motor removal ..................................................................................... 82
4.2.6 Waste drain ink pad unit removal .............................................................. 83
4.2.7 Printer mechanism removal ....................................................................... 84
4.2.8 Circuit board removal ................................................................................ 85
4.2.9 LD Roller removal ..................................................................................... 88
4.2.10 HP/PE Sensor removal ............................................................................ 92
4.2.11 Ink system unit removal (Cap & Pump unit ) .......................................... 93
4.2.12 ASF Motor Removal ............................................................................... 97
4.2.13 Paper Eject Roller removal ...................................................................... 98
4.2.14 PF motor removal .................................................................................. 100
4.2.15 CR unit removal ..................................................................................... 102
4.2.16 Paper feed roller removal ...................................................................... 105
4.2.17 Disassembling ASF frame unit .............................................................. 108
4.3 Preview monitor disassembly procedure ..................................................... 111
4.3.1 Back case removal ................................................................................... 111
4.3.2 Removal of the control board unit ........................................................... 112
4.3.3 Panel unit removal ................................................................................... 113
Chapter 5 Adjustment
5.1 Outline ............................................................................................................. 115
5.1.1 Adjustment items ..................................................................................... 115
5.2 Parallel adjustor ............................................................................................. 116
5.3 Adjustments with the service program ........................................................ 118
5.3.1 Outline ..................................................................................................... 118
5.3.2 Starting up the service program ............................................................... 118
5.3.3 EEPROM initial setting ........................................................................... 120
5.3.4 Head ID .................................................................................................... 121
5.3.5 Bi-D ......................................................................................................... 122
5.3.6 USB ID .................................................................................................... 123
5.3.7 Memory card drive confirmation ............................................................. 124
5.3.8 Head cleaning .......................................................................................... 124
5.3.9 Ink replenishment .................................................................................... 125
5.3.10 Refurbishment for DOA ........................................................................ 126