Ricoh B079 Service Manual page 205

Code No.
503 C 3rd Tray lift malfunction (optional paper
tray unit)
The paper height sensor is not
activated after the tray lift motor has
been on for 13 seconds.
If the main power switch is turned on
when the paper is already at the feed
height, the paper height position is
detected again. At this time, the paper
height sensor should de-activate within
5 seconds after the paper bottom plate
starts to drop. If it does not deactivate
within 5 s four times consecutively, the
tray lift motor halts. After two attempts
to re-set the paper tray, if this does not
solve the problem, then this SC is
displayed and tray control halts.
504 C 4th Tray lift malfunction (optional paper
tray unit)
The paper height sensor is not
activated after the tray lift motor has
been on for 13 seconds.
If the main power switch is turned on
when the paper is already at the feed
height, the paper height position is
detected again. At this time, the paper
height sensor should de-activate within
5 seconds after the paper bottom plate
starts to drop. If it does not deactivate
within 5 s four times consecutively, the
tray lift motor halts. After two attempts
to re-set the paper tray, if this does not
solve the problem, then this SC is
displayed and tray control halts.
506 C Paper tray unit main motor lock
(optional paper tray)
A main motor lock signal is detected for
more than 50 ms during rotation.
507 C LCT main motor lock (optional LCT)
A main motor lock signal is detected for
more than 50 ms during rotation.
SM
CÓPIA NÃO CONTROLADA
Symptom
4-7
CÓPIA NÃO CONTROLADA
SERVICE CALL CONDITIONS
Possible Cause
Tray lift motor defective or disconnected
Height sensor defective or
disconnected
Tray lift motor defective or disconnected
Height sensor defective or
disconnected
Paper tray unit main motor defective
Paper tray unit main motor connection
loose
Too much load on the drive mechanism
LCT main motor defective
Paper tray unit main motor connection
loose
Too much load on the drive mechanism
B079/B082