Kyocera FS-C5150DN Service Manual page 81

Code Contents
7404 Developing unit Y non-
installing error
No density detection signal is
output from toner sensor Y in
developing unit Y.
7411 Drum unit K non- installing
error
The EEPROM of drum PWB K
does not communicate nor-
mally.
7412 Drum unit C non- installing
error
The EEPROM of drum PWB
C does not communicate nor-
mally.
Causes
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. Developing unit Y and Drum relay PWB
(YC13)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective toner Replace the developing unit Y (see page 1-
sensor Y. 5-18).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
Installation of Install drum unit K compatible with the spec-
incompatible drum ifications to the machine.
unit K.
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. Drum unit K and Drum relay PWB (YC2)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective drum Replace the drum unit K (see page 1-5-20).
PWB K.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
Installation of Install drum unit C compatible with the spec-
incompatible drum ifications to the machine.
unit C.
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. Drum unit C and Drum relay PWB (YC4)
Drum relay PWB (YC1) and engine PWB
(YC34)
Defective drum Replace the drum unit C (see page 1-5-20).
PWB C.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-26).
1-4-26
Check procedures/
corrective measures
2KT/2KV