Ricoh FT4215, Service Training Manual

Page: 136 / 208

9. ORIGINAL MISFEED SENSING
The registration sensor and the feed-out sensor are used for misfeed checks.
1. One sided original
If the registration sensor is not actuated within 685 milliseconds after the belt
drive motor starts turning, the Original Misfeed indicator lights (ON check).
If the registration sensor does not turn off within 1,250 milliseconds, the CPU
determines that there has been an original misfeed (OFF check). The
Original Misfeed indicator also lights if the feed-out sensor is not actuated
within 1,250 milliseconds after the feed-out motor starts turning (ON check)
or if the feed-out sensor does not turn off within 1,250 milliseconds after the
feed-out sensor is actuated (OFF check).
Registration Sensor
ON check (685 ms)
OFF check (1250 ms)
ON check (1250 ms)
OFF check (1250 ms)
Feed-out Sensor
Belt Drive Motor
Feed-out Motor
FT4220/4222 3-22 STM