Ricoh B121 Service Manual page 417

2.6 JAM DETECTION
JAM 1: If the registration sensor fails to turn on within x
transport motor comes on to feed the original from the original tray.
x = (114 x 1.1)/original speed + 2,000 ms
1
JAM 2: If the registration sensor fails to turn off within x
transport motor comes on to feed the original from the original tray.
x = (original length/original speed) + 2,000 ms
2
JAM 3: If there is no original at the registration sensor when scanning is started,
even though the sensor had already turned on.
JAM 4: The current original is stopped after the registration sensor detects its
leading edge, but the previous original is still at the scanning position.
JAM 5: If the original stopped at the stamp position is removed.
JAM 6: If the cover is opened or the ADF is lifted up while the ADF is in
operation.
JAM 7: If the DF gate signal (indicating that the original is now in the correct
position for scanning) is not asserted when the original trailing edge
passes the DF exposure glass.
JAM 7 occurs when the original is pulled out while it is being scanned.
SM
ms after the DF
1
ms after the DF
2
11
JAM DETECTION
B387