Kyocera KM-3050 - Page 173

2GN/2GP/2GR
1-4-33
C7810 Short-circuited external thermistor
The thermistor input value is 0.5 V or
less.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC14 on
the engine PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective humidity
sensor.
Replace the humidity sensor.
C7900 Drum EEPROM error
Reading from or writing to EEPROM
cannot be performed.
Poor contact in the
connector termi-
nals.
Check the connection of connector on the
engine PWB and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective drum
unit.
Replace the drum unit.
C7910 Developing unit EEPROM error
Reading from or writing to EEPROM
cannot be performed.
Poor contact in the
connector termi-
nals.
Check the connection of connector on the
engine PWB and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective develop-
ing unit.
Replace the developing unit.
C8020 Punch motor problem (optional 3000-
sheet document finisher)
The LOCK signal of the punch motor is
detected for more than 500 ms while the
punch motor is operating.
Poor contact in the
connector termi-
nals.
Check the connection of connector on the
punch PWB and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective punch
motor.
Replace the punch motor.
Defective PWB. Replace the punch PWB or finisher main
PWB and check for correct operation.
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.
The tray upper limit
sensor/push paper
sensor/surface
view sensor con-
nector makes poor
contact.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
remedy or replace the cable.
Defective tray
upper limit sensor/
push paper sensor/
surface view sen-
sor.
Replace the sensor.
Defective finisher
main PWB.
Replace the finisher main PWB and check
for correct operation.
Code Contents
Remarks
Causes Check procedures/corrective measures