Kyocera FS-C8500DN Service Manual page 199

Code
C7914 Developing unit Y EEPROM error
No response is issued from the device in
reading/writing for 5 ms or more and this
problem is repeated five times succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
C7950 High voltage control PWB error
A communication error from high voltage
control PWB is detected 10 times in suc-
cession.
C8020 Punch motor problem (optional 3000-
sheet document finisher)
The error signal of the punch motor is
detected for more than 500 ms while the
punch motor is operating.
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.
C8040 Belt problem (optional document fin-
isher)
The belt sensor does not turn on/off
within specified time of the belt solenoid
turning on.
Contents
Causes Check procedures/corrective measures
Poor contact in the Check the connection of connector YC4 on
connector termi- the sub front PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective develop- Replace the developing unit Y (see page 1-
ing PWB Y. 5-25).
Poor contact in the Check the connection of connector YC30 on
connector termi- the engine PWB and the connector on the
nals. high voltage control PWB, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective PWB. Replace the high voltage control PWB or
engine PWB and check for correct opera-
tion.
Poor contact in the Check the connection of connector on the
connector termi- punch PWB and the continuity across the
nals. connector terminals. Repair or replace if
necessary.
Defective punch Replace the punch motor.
motor.
Defective PWB. Replace the punch PWB or finisher main
PWB and check for correct operation.
The tray upper limit Reinsert the connector. Also check for conti-
sensor, paper sur- nuity within the connector cable. If none,
face sensor 1/2 remedy or replace the cable.
connector makes
poor contact.
Defective tray Replace the sensor.
upper limit sensor,
paper surface sen-
sor 1/2.
Defective finisher Replace the finisher main PWB and check
main PWB. for correct operation.
The belt sensor, Reinsert the connector. Also check for conti-
belt solenoid con- nuity within the connector cable. If none,
nector makes poor remedy or replace the cable.
contact.
Defective belt sen- Replace the belt sensor.
sor.
Defective belt sole- Replace the belt solenoid.
noid.
Defective finisher Replace the finisher main PWB and check
main PWB. for correct operation.
Remarks
2KA
1-4-45