41y.xx paper jams ............................................................................................................................................. 92
43y.xx paper jams ............................................................................................................................................. 93
451 paper jams ................................................................................................................................................. 94
455–457 paper jams ......................................................................................................................................... 95
User attendance messages (0-99.99)......................................................................................................98
User attendance messages (0‑99.99) ............................................................................................................... 98
Toner level sensing error check ...................................................................................................................... 103
Toner cartridge smart chip error service check .............................................................................................. 103
Imaging unit smart chip service check............................................................................................................104
Fuser unit smart chip service check ................................................................................................................ 105
Printer hardware errors (100-199.99)...................................................................................................105
Printer hardware error messages(100‑199.99) .............................................................................................. 106
Printhead ID service check.............................................................................................................................. 110
Printhead service check .................................................................................................................................. 110
Fuser drive motor service check ..................................................................................................................... 111
Fuser service check ......................................................................................................................................... 111
LVPS service check .......................................................................................................................................... 112
Toner level sensing service check ...................................................................................................................112
Main drive motor service check......................................................................................................................113
Media feeder service check ............................................................................................................................ 113
Redrive motor service check...........................................................................................................................114
Duplex motor service check............................................................................................................................114
Toner add motor service check ...................................................................................................................... 115
Main cooling fan service check ....................................................................................................................... 115
Cartridge cooling fan service check ................................................................................................................ 116
LVPS cooling fan service check ....................................................................................................................... 116
HVPS cooling fan service check.......................................................................................................................117
Miscellaneous cooling fan service check ........................................................................................................117
ADF and scanner errors.........................................................................................................................118
ADF and scanner error messages (280‑295.20).............................................................................................. 118
ADF cover open jam........................................................................................................................................119
Sensor (ADF pick) static jam ...........................................................................................................................119
Sensor (ADF pick) never arriving or late arriving jam service check ...............................................................120
Sensor (ADF pick) late leaving or not cleared jam service check ....................................................................121
Sensor (ADF 1st scan) static jam service check...............................................................................................123
Sensor (ADF 1st scan) never arriving or late arriving jam service check.........................................................123
Sensor (ADF 1st scan) late leaving or not cleared jam.................................................................................... 125
Sensor (ADF 2nd scan) static jam.................................................................................................................... 126
Sensor (ADF 2nd scan) never arriving or late arriving jam service check .......................................................127
Sensor (ADF 2nd scan) late leaving or not cleared jam service check ............................................................ 128
Sensor (ADF media exit) static jam service check........................................................................................... 129
Sensor (ADF media exit) never arriving or late arriving jam service check..................................................... 130
Sensor (ADF media exit) late leaving or not cleared jam service check.......................................................... 131
Sensor (multifeed detect) detected multiple sheets service check................................................................133
7463
Table of contents
5