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Code
Contents
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 eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
7913
Developer 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
Developer 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.
Y116141-8
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 (YC8)
Engine connect PWB and engine PWB
(YC4)
Defective devel-
Replace the developer unit C (see 1-5-13).
oper PWB.
Defective PWB.
Replace the engine PWB check for correct
operation (see page 1-5-33).
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 (YC8)
Engine connect PWB and engine PWB
(YC4)
Defective devel-
Replace the developer unit M (see 1-5-13).
oper PWB.
Defective PWB.
Replace the engine PWB check for correct
operation (see page 1-5-33).
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 (YC8)
Engine connect PWB and engine PWB
(YC4)
Defective devel-
Replace the developer unit Y (see 1-5-13).
oper PWB.
Defective PWB.
Replace the engine PWB check for correct
operation (see page 1-5-33).
1-4-49
Check procedures/
corrective measures
Service Manual
2NP
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