Figure 1-33āTray lift mechanism ............................................................................................................ 44
Figure 1-34āPaper-level-detection mechanism .......................................................................................... 45
Figure 1-35āMultifeed prevention .......................................................................................................... 45
Figure 1-36āMultipurpose tray pickup mechanism ................................................................................... 46
Figure 1-37āPaper-feed mechanism ....................................................................................................... 47
Figure 1-38āSkew-feed prevention ......................................................................................................... 48
Figure 1-39āFuser and delivery unit ....................................................................................................... 49
Figure 1-40āLoop-control mechanism ..................................................................................................... 50
Figure 1-41āPressure-roller pressurization control .................................................................................... 51
Figure 1-42āDuplexing unit ................................................................................................................... 52
Figure 1-43āJam detection sensors ........................................................................................................ 54
Figure 1-44āOptional paper feeder ....................................................................................................... 56
Figure 1-45āSignals for the paper feeder ............................................................................................... 57
Figure 1-46āPaper-feeder pickup and feed operation ............................................................................... 58
Figure 1-47āPaper size detection .......................................................................................................... 59
Figure 1-48āPaper-feeder lift ................................................................................................................. 61
Figure 1-49āPaper-feeder multiple feed prevention .................................................................................. 62
Figure 1-50āJam detection .................................................................................................................... 64
Figure 1-51āADF path for single-sided documents ................................................................................... 66
Figure 1-52āADF path for two-sided documents ...................................................................................... 67
Figure 2-1āDiagnostic test (1 of 3) ......................................................................................................... 92
Figure 2-2āDiagnostic test (2 of 3) ......................................................................................................... 92
Figure 2-3āDiagnostic test (3 of 3) ......................................................................................................... 93
Figure 2-4āEngine-test button ................................................................................................................ 94
Figure 2-5āTest the front door switch (1 of 4) .......................................................................................... 98
Figure 2-6āTest the front door switch (2 of 4) .......................................................................................... 98
Figure 2-7āTest the front door switch (3 of 4) .......................................................................................... 99
Figure 2-8āTest the front door switch (4 of 4) .......................................................................................... 99
Figure 2-9āTest the regist
ration sensor .................................................................................................. 100
Figure 2-10āTest the fuser loop sensors ................................................................................................ 101
Figure 2-11āTest the fuser pressure-release sensor (1 of 2) ...................................................................... 102
Figure 2-12āTest the fuser pressure-release sensor (2 of 2) ...................................................................... 102
Figure 2-13āTest the fuser output sensor (1 of 2) .................................................................................... 103
Figure 2-14āTest the fuser output sensor (2 of 2) .................................................................................... 103
Figure 2-15āTest the duplexer refeed sensor ......................................................................................... 104
Figure 2-16āTest the output-bin-full sensor ............................................................................................. 105
Figure 2-17āTest the ITB alienation sensor (1 of 2) ................................................................................. 107
Figure 2-18āTest the ITB alienation sensor (2 of 2) ................................................................................. 108
Figure 2-19āTest the Tray 1 paper sensor ............................................................................................. 110
Figure 2-20āTest the Tray 2 paper sensor ............................................................................................. 111
Figure 2-21āTest the Tray 2 sensor (1 of 2) ........................................................................................... 112
xxiv ENWW