Kyocera FS-C8500DN - Page 198

2KA
1-4-44
C7903 Drum 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 succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC7 on
the sub front PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective drum
PWB M.
Replace the drum unit M (see page 1-5-26).
C7904 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 succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC3 on
the sub front PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective drum
PWB Y.
Replace the drum unit Y (see page 1-5-26).
C7911 Developing 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 succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC4 on
the main front PWB and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective develop-
ing PWB K.
Replace the developing unit K (see page 1-
5-25).
C7912 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 succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC6 on
the sub front PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective develop-
ing PWB C.
Replace the developing unit C (see page 1-
5-25).
C7913 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 succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC8 on
the sub front PWB and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective develop-
ing PWB M.
Re
place
the developing unit M (see page 1-
5-25).
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Remarks
Causes Check procedures/corrective measures