Ricoh C231 Service Manual page 684

ERROR DETECTION
6.12.2 ADF JAM (P JAM LOCATION INDICATOR)
Feeding in the original (ADF)
Finish Scanning
Original Registration Sn
Original Feed Motor
Original feed Clutch
Feeding in Feeding out
C267D904.WMF
Feeding in
The P jam indicator lights if the original registration sensor does not turn on within 5
seconds after the original feed motor turns on
Feeding out
When the scanner has fed out the correct length and feeds 150mm more, but the
original registration sensor still detects the original, the P jam indicator lights.
Just after turning on the main switch
If the original registration sensor detects an original, the P jam indicator lights.
SM 6-53 C267