Kyocera Mita KM-2560 Service Manual page 159

Code Contents
C7400 Developing unit connector insertion
problem
Absence of the developing unit is
detected.
C7410 Drum unit connector insertion prob-
lem
Absence of the drum unit is detected.
C7800 Broken external thermistor wire
The thermistor output value is 4.5 V or
more.
C8030 Tray upper limit detection problem
(optional document finisher)
When the tray elevation motor raises a
tray, the ON status of the tray upper limit
sensor is detected.
C8140 Tray elevation motor problem
(optional document finisher)
When the tray elevation motor is driving,
the ON status of the tray lower limit sen-
sor or surface view sensor cannot be
detected even if 10 s passed.
Remarks
Causes Check procedures/corrective measures
Developing unit Reinsert the developing unit connector if
connector inserted necessary.
incorrectly.
Defective develop- Replace the developing unit.
ing unit connector.
Drum unit connec- Reinsert the drum unit connector if neces-
tor inserted incor- sary.
rectly.
Defective drum unit Replace the drum unit.
connector.
Poor contact in the Check the connection of connector YC1 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective humidity Replace the humidity sensor.
sensor.
The tray upper limit Reinsert the connector. Also check for conti-
sensor/push paper nuity within the connector cable. If none,
sensor/surface remedy or replace the cable.
view sensor con-
nector makes poor
contact.
Defective tray Replace the sensor.
upper limit sensor/
push paper sensor/
surface view sen-
sor.
Defective finisher Replace the finisher main PWB and check
main PWB. for correct operation.
The tray elevation Reinsert the connector. Also check for conti-
motor connector nuity within the connector cable. If none,
makes poor con- remedy or replace the cable.
tact.
The tray elevation Replace the tray elevation motor.
motor malfunc-
tions.
The tray lower limit Reinsert the connector. Also check for conti-
sensor/push paper nuity within the connector cable. If none,
sensor/surface remedy or replace the cable.
view sensor con-
nector makes poor
contact.
Defective tray Replace the sensor.
lower limit sensor/
push paper sensor/
surface view sen-
sor.
Defective finisher Replace the finisher main PWB and check
main PWB. for correct operation.
2H0/2HZ-1
1-4-27