Olivetti d-Copia 6500MF Plus Service Manual page 446

Code Contents
7800 Broken outer temperature
sensor wire
The device did not respond for
more than 5 ms during
reading, in 5 times.
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.
Service Manual
Related parts
Outer temperature
sensor
Front PWB Replace the front PWB
Engine PWB
DR PWB
Front PWB Replace the front PWB
Engine PWB
Developer unit
Front PWB Replace the front PWB
Engine PWB
1-4-118
Check procedures/
corrective measures
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Outer temperature sensor and Front
PWB (YC8)
Front PWB (YC2) and Engine PWB
(YC8)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Outer temperature sensor.
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
83).
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
DR PWB and Front PWB (YC6)
Front PWB (YC2) and Engine PWB
(YC8)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Drum unit (see page 1-5-
57).
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
83).
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Developer unit and Front PWB (YC7)
Front PWB (YC2) and Engine PWB
(YC8)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the Developer unit (see page 1-
5-56).
1. Check the engine software and upgrade
to the latest, if necessary.
2. Replace the engine PWB (see page 1-5-
83).
2N8/2N7
Y116520-