Original Misfeed Sensing - Ricoh FT6645 Service Training Manual

13. ORIGINAL MISFEED SENSING

The copier CPU lights the original misfeed indicator if the previous original
remains on the exposure glass after manual copying and RDH feed is
attempted. When the RDH is lifted and the previous original is removed, RDH
copying is permitted.
13.1 One-sided original
Registration
Sensor
Inverter
Sensor
Feed-out
Sensor
Feed-in
Motor
Inverter
Motor
If the registration sensor is not actuated within 750 milliseconds after the
feed-in motor starts turning, the Original Misfeed indicator lights (ON check).
If the registration sensor does not turn off within 640 milliseconds, the CPU
determines that there has been an original misfeed (OFF check).
If the inverter sensor is not actuated within 700 milliseconds after the inverter
motor starts turning (ON check) or if the inverter sensor does not turn off
within 850 milliseconds, the Original Misfeed indicator turns on.
If the feed-out sensor is not actuated within 700 milliseconds after the inverter
sensor turns off (ON check), or if the feed-out sensor does not turn off within
1250 milliseconds, the Original Misfeed indicator lights (OFF check).
STM
ON Check OFF Check
(750 ms) (640 ms)
5-19
ON Check
(700 ms)
OFF Check
(850 ms)
ON Check
(700 ms)
FT6645/6655/6665
Rev. 10/94
OFF Check
(1250 ms)