Kyocera FS-C8520MFP Service Manual page 219

Code Contents
7912 Developing 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 eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
7913 Developing unit M 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 eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
7914 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
successively.
Mismatch of reading data from
two locations occurs eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
Causes
Poor contact in the Reinsert the connector. Also check for conti-
connector termi- nuity within the connector cable. If none,
nals. replace the cable.
Developer unit (C) and drum connect
PWB(YC7)
drum connect PWB and engine connect
PWB (YC4)
Engine connect PWB and engine PWB
(YC12)
Defective develop- Replace the developer unit C (see 1-5-14).
ing PWB.
Poor contact in the Reinsert the connector. Also check for conti-
connector termi- nuity within the connector cable. If none,
nals. replace the cable.
Developer unit (M) and drum connect
PWB(YC8)
drum connect PWB and engine connect
PWB (YC4)
Engine connect PWB and engine PWB
(YC12)
Defective develop- Replace the developer unit M (see 1-5-14).
ing PWB.
Poor contact in the Reinsert the connector. Also check for conti-
connector termi- nuity within the connector cable. If none,
nals. replace the cable.
Developer unit (Y) and drum connect
PWB(YC6)
drum connect PWB and engine connect
PWB (YC4)
Engine connect PWB and engine PWB
(YC12)
Defective develop- Replace the developer unit Y (see 1-5-14).
ing PWB.
1-4-31
Check procedures/
corrective measures
2MY/2MZ