Drum Y Eeprom Error; Developer Unit K Eeprom Error; Developer Unit C Eeprom Error - Kyocera FS-C8600DN Service Manual

Code Contents
7904

Drum 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
successively.
Mismatch of reading data from
two locations occurs 8 times
successively.
Mismatch between writing
data and reading data occurs
8 times successively.
7911 Developer unit K EEPROM
error
No response is issued from
the device in reading/writing
for 5 ms or more and this
problem is repeated five times
successively.
Mismatch of reading data from
two locations occurs 8 times
successively.
Mismatch between writing
data and reading data occurs
8 times successively.
7912 Developer unit C EEPROM
error
No response is issued from
the device in reading/writing
for 5 ms or more and this
problem is repeated five times
successively.
Mismatch of reading data from
two locations occurs 8 times
successively.
Mismatch between writing
data and reading data occurs
8 times successively.
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. Drum PWB Y and front PWB (YC14)
Front PWB (YC2) and engine PWB (YC10)
Defective drum Replace the drum unit Y (see page 1-5-29).
PWB Y.
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. Developer unit K and front PWB (YC9)
Front PWB (YC2) and engine PWB (YC10)
Defective devel- Replace the developer unit K (see page 1-5-
oper unit K. 29).
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. Developer unit C and front PWB (YC13)
Front PWB (YC2) and engine PWB (YC10)
Defective devel- Replace the developer unit C (see page 1-5-
oper unit C. 29).
1-4-68
Check procedures/
corrective measures
2MN/2N1