Ricoh B082 Service Manual page 204

SERVICE CALL CONDITIONS
Code No.
405 C Transfer belt error
The transfer belt does not move away
from the drum during ID sensor pattern
checking.
440 C Main motor lock
A main motor lock signal is not detected
within 2 seconds after the main motor
turns on.
450 C Feed Development Motor Error
The PLL lock signal remains LOW for 2
s while the feed development motor is
operating.
490 C Exhaust fan motor lock
An exhaust fan motor lock signal is not
detected within 5 seconds after the
exhaust fan motor turns on.
492 C Cooling fan motor lock
A cooling fan motor lock signal is not
detected within 5 seconds after the
cooling fan motor turns on.
501 C 1st Tray lift malfunction
The paper height sensor is not
activated after the tray lift motor has
been on for 10 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, a message
will prompt the user to reset Tray 1.
After two attempts to release the error
by re-setting the paper tray, if this does
not solve the problem then this SC is
displayed.
502 C 2nd Tray lift malfunction
The paper height sensor is not
activated after the tray lift motor has
been on for 10 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, a message
will prompt the user to reset Tray 2.
After two attempts to re-set the paper
tray, if this does not solve the problem
then this SC is displayed.
B079/B082
Symptom
4-6
Possible Cause
Main motor/drive malfunction
Transfer belt position sensor defective
Poor transfer belt position sensor
connection
Too much load on the drive mechanism
Main motor defective
Motor lock caused by overload.
Motor driver defective.
Too much load on the drive mechanism
Exhaust fan motor defective or a loose
object is interfering with the fan
Poor fan motor connector connection
Too much load on the drive mechanism
Cooling fan motor defective or a loose
object is interfering with the fan
Poor fan motor connector connection
Lift motor malfunction or disconnected
Height sensor abnormal, or connector
loose
Loose paper or object between the tray
and motor
Pick-up arm malfunction
Lift motor abnormal or disconnected
Height sensor defective or
disconnected
Loose paper or object between the tray
and motor
Pick-up arm malfunction
SM