Ricoh A250 Service Manual page 113

PAPER FEED
Registration sensor ON check
When the registration sensor does not turn on within a certain time after the paper
feed clutch turns on (1st tray: 2.0 s, 2nd tray: 1.3 s, 3rd tray: 1.7 s).
Registration sensor OFF check
During multi-page printing, the registration sensor is not turned off by the trailing
edge of the current page after the paper feed clutch turns on to feed the next page.
After the registration sensor turns on, it does not turn off within 0.8 seconds after
the expected time, which is calculated from the paper length.
Fusing exit sensor ON check
When the fusing exit sensor does not turn on within 2.5 seconds after the
registration clutch turns on.
Fusing exit sensor OFF check
During multi-page printing, the fusing exit sensor is not turned off by the trailing
edge of the previous page after the designated time.
The fusing exit sensor does not turn off within 0.9 seconds after the sensor-off time
occurs. This time is calculated from the paper length.
Vertical transport sensor ON check
When the vertical transport sensor does not turn on within 1.5 seconds after the
2nd paper feed clutch turns on.
Vertical transport sensor OFF check
When the vertical transport sensor does not turn on within 1.8 seconds after the
vertical transport sensor (optional PFU) turns on.
Vertical transport sensor (optional PFU) ON check
When the vertical transport sensor (optional PFU) does not turn on within 1.5
seconds after the 3rd paper feed clutch turns on.
Vertical transport sensor (optional PFU) OFF check
During multi-page printing, the vertical transport sensor (optional PFU) is not turned
off by the trailing edge of the previous page after the designated time.
SM 2-55 A250