Troubleshooting flowchart ......................................................................... 61
Power subsystem ..................................................................................................... 62
Power-on checks ...................................................................................... 62
Power-on troubleshooting overview .............................................. 62
Control-panel checks ............................................................................................... 63
Scanning subsystem ................................................................................................ 65
Tools for troubleshooting ......................................................................................................... 66
Individual component diagnostics .............................................................................. 66
LED diagnostics ........................................................................................ 66
Understand lights on the formatter ............................................... 66
Engine diagnostics ................................................................................... 69
Engine-test button ...................................................................... 69
Paper path test ......................................................................................... 71
Paper path sensors test ............................................................................. 71
Manual sensor test ................................................................................... 73
SW501 Cartridge door switch test .............................................. 75
PS8001 Rear door sensor test ..................................................... 76
PS215 Top (Top-of-Page) sensor test ............................................ 77
PS225 Paper width 1 sensor test ................................................. 78
PS2 Fuser output sensor test ........................................................ 79
PS502 Duplexer refeed sensor test .............................................. 80
PS1 Rear bin sensor test ............................................................. 81
PS4 Output bin full sensor test ..................................................... 82
PS8008 Tray 3 Feed sensor ....................................................... 83
PS8008 Tray 4 Feed sensor ....................................................... 84
Tray/bin manual sensor test ...................................................................... 85
PS205 Tray 1 Paper sensor test ................................................... 87
PS3 Tray 2 Paper sensor test ....................................................... 88
SW235 Tray 2 Cassette sensor test ............................................. 89
PS4 Output bin full sensor test ..................................................... 90
PS451 Tray 3 paper sensor test .................................................. 91
PS461 Tray 3 cassette sensor test ................................................ 92
PS451 Tray 4 paper sensor test .................................................. 93
PS461 Tray 4 cassette sensor test ................................................ 94
Print/stop test .......................................................................................... 94
Component tests ....................................................................................... 95
Control-panel tests ..................................................................... 95
Half self-test .............................................................................. 96
Drum rotation test check ............................................................. 96
Component test (special-mode test) .............................................. 96
Diagrams ............................................................................................................... 98
ENWW vii
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