Abnormal Indications - Ricoh FT7770 Service Manual

30 April, '89
FUNCTIONAL
1) The Please Wait indicator stays on after making duplex copies.
Then duplex can not be selected.
The rear side plate is not returning to the home position.
Check for any mechanical restrictions which may limit side plate
movement.
Check if the duplex side plate sensor is shorted.

Abnormal Indications

1) During copy run, indicators go off or some incorrect
indicators turn on.
Re-adjust VR202 of the main board so that TP218 (TPTH) voltage
is within the standard range (+1.31 to +1.35V).
2) "There are copies in the duplex tray" is displayed when
selecting the duplex mode
Replace the duplex paper feed sensor.
3) All Paper volume LEDs are displayed even when the tray is
empty.
Replace the paper volume sensor.
4) Even if the tray is not
empty, paper is not sensed.
Replace the paper end sensor.
PROBLEMS
13-32