2KZ/2K0
1-4-27
6740 Abnormally high IGBT2
temperature (IHPWB)
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
Defective cooling
fan motor.
Replace the IH fan motor.
6750 Abnormally output overcur-
rent (IHPWB)
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
Defective fuser
unit.
Replace the fuser unit.
6760 Abnormally AC input over-
current (IHPWB)
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
6770 Abnormally low electric
power (IHPWB)
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
6930 IH coil fan motor error
The alarm signal was
detected for 5 seconds contin-
uously during operation.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
IH coil fan motor and engine PWB(YC21)
Defective cooling
fan motor.
Replace the IH coil fan motor.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
6950 IH CPU communication
error
A communication error is
detected 3 times in succes-
sion.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-31).
6990 Fuser unit type mismatch
problem
Absence of the fuser unit is
detected.
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-35).
Code Contents Causes
Check procedures/
corrective measures
Y113010-4 Sevice Manual
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