Kyocera FS-C8520MFP Service Manual page 215

Code Contents
6740 Abnormally high IGBT2
temperature (IHPWB)
6750 Abnormally output overcur-
rent (IHPWB)
6760 Abnormally AC input over-
current (IHPWB)
6770 Abnormally low electric
power (IHPWB)
6930 IH coil fan motor error
The alarm signal was
detected for 5 seconds contin-
uously during operation.
6950 IH CPU communication
error
A communication error is
detected 3 times in succes-
sion.
6990 Fuser unit type mismatch
problem
Absence of the fuser unit is
detected.
Causes
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective cooling Replace the IH fan motor.
fan motor.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective fuser Replace the fuser unit.
unit.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. IH coil fan motor and engine PWB(YC21)
Defective cooling Replace the IH coil fan motor.
fan motor.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-32).
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-36).
1-4-27
Check procedures/
corrective measures
2MY/2MZ