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EPSON EPL-5900/EPL-5900L
2.1.3 Drive System .................................................................................. 61
2.1.4 Names and Functions of Electrical Parts (Printer Body)................ 62
(Not Applicable to EPL-5900L) .............................................................. 63
2.1.6 Timing Chart .................................................................................. 64
2.2 Description of Mechanisms .................................................................... 65
2.2.1 Paper Path ....................................................................................... 65
2.2.2 Paper Feed Mechanism................................................................... 66
2.2.2.1 Paper Tray ........................................................................................... 66
2.2.2.2 Lower Cassette Unit (Option for EPL-5900) ...................................... 67
2.2.3 Charging Process ............................................................................ 69
2.2.4 Exposure Process............................................................................ 70
2.2.5 Development Process ..................................................................... 71
2.2.6 Transfer Process ............................................................................. 72
2.2.7 Fusing Process ................................................................................ 73
2.2.8 Paper Eject Process......................................................................... 75
2.3 Operating Principles of Electric Circuitry .............................................. 76
2.3.1 Operation Overview of the Main Control Circuit Board................ 76
3.1 Overview................................................................................................. 80
3.1.1 Specified Tools ............................................................................... 80
3.1.2 Procedure for Troubleshooting....................................................... 80
3.1.3 Printer Messages (EPL-5900)......................................................... 80
3.1.3.1 Service Call Error ................................................................................ 80
3.1.4 Printer Messages (EPL-5900L) ...................................................... 84
3.1.4.1 Printer Status. ...................................................................................... 84
3.1.4.2 Engine Error ........................................................................................ 84
3.1.5 Paper Jam Detection ....................................................................... 85
3.1.5.1 Overview ............................................................................................. 85
3.1.5.2 Paper Jam Conditions .......................................................................... 85
3.1.5.3 Resetting the Paper Jam ...................................................................... 85
3.1.6 Detection of Abnormal Operations ................................................ 86
3.2 Troubleshooting for Paper Jam............................................................... 87
3.2.1 Paper Jam when the Power is ON .................................................. 87
3.2.2 Paper Jam in Paper Feed to Paper Transport.................................. 87
3.2.3 Paper Jam in Paper Transport to Paper Eject.................................. 88
3.3 Troubleshooting for Abnormal Operations............................................. 89
3.3.1 Abnormal Laser .............................................................................. 89
3.3.2 Abnormal Polygon Motor ............................................................... 89
3.3.3 Abnormal Main Motor.................................................................... 89
3.3.4 Abnormal Fusing ............................................................................ 89
3.3.5 Power Cannot be Turned ON.......................................................... 90
3.4 Troubleshooting for Print Quality Problems........................................... 91
3.4.1 All White......................................................................................... 91
3.4.2 All Black ......................................................................................... 91
3.4.3 White Out........................................................................................ 92
3.4.4 Back of Paper Gets Dirty ................................................................ 92
3.4.5 Low Image Density......................................................................... 92
3.4.6 Foggy Background.......................................................................... 92
3.4.7 White Line / Black Line.................................................................. 93
3.4.8 Offset Image ................................................................................... 93
4.1 Overview ................................................................................................. 95
4.1.1 Precautions...................................................................................... 95
4.1.2 Tools ............................................................................................... 97
4.1.3 Screws ............................................................................................. 97
4.2 Main Unit Disassembly........................................................................... 98
4.2.1 Preparation before Disassembling .................................................. 99
4.2.2 Imaging Cartridge and Drum Cartridge Removal .......................... 99
4.3 Disassembly and Reassembly of the Printer Body ............................... 100
4.3.1 Transfer Roller Removal .............................................................. 100
4.3.2 Paper Separator Unit Removal ..................................................... 101
4.3.3 Right Cover Removal ................................................................... 101
4.3.4 Control Panel Removal ................................................................. 102
4.3.5 Main Board Assy Removal........................................................... 103
4.3.6 Interface Board (C409I/F) Removal............................................. 104
4.3.7 Left Cover Removal...................................................................... 105
4.3.8 Front Cover Removal.................................................................... 105
4.3.9 Paper Feed Roller Removal .......................................................... 106
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Table of Contents
Troubleshooting
