Olivetti d-Copia 3500MF Service Manual page 283

Code Contents
7810 Short-circuited outer tem-
perature sensor
The sensor input sampling is
less than 0.
7901 Drum 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 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.
Y113350-5
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. Outer temperature sensor and front PWB
(YC8)
Front PWB (YC2) and engine PWB (YC8)
Defective outer Replace outer temperature sensor.
temperature sen-
sor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-43).
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 and front PWB (YC6)
Front PWB (YC2) and engine PWB (YC8)
Defective drum Replace the drum unit (see page 1-5-29).
PWB.
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 and front PWB (YC7)
Front PWB (YC2) and engine PWB (YC8)
Defective devel- Replace the developer unit (see page 1-5-
oper unit. 28).
1-4-41
2LL/2LJ/2LH
Check procedures/
corrective measures
Sevice Manual