Gestetner B003 Service Manual page 193

Code No.
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.
510 C LCT tray malfunction
1) The LCT lift sensor does not
activate for more than 18
seconds after the LCT lift motor
turned on.
2) The LCT lower limit sensor
does not activate for more than
18 seconds after the LCT lift
motor turned on.
3) The LCT lift sensor is already
activated when the LCT lift
motor turns on.
4) After the paper end sensor is
actuated while the tray is
raising, the upper limit sensor is
not actuated within 5 s. A
message is displayed to remind
the user to set the paper and
tray control halts. Resetting the
display is done by opening and
closing the LCT door.
5) The 4) state has been detected
3 times in succession.
SM
Symptom
4-7
SERVICE CALL CONDITIONS
Possible Cause
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
LCT lift motor defective or
disconnected.
Upper limit sensor defective or
disconnected
Pick-up solenoid defective or
disconnected
Paper end sensor defective
B003/B004/B006/B007