Olivetti d-Copia 6500MF Plus Service Manual page 442

Code Contents
7241 Broken developer thermis-
tor wire
The sensor input sampling is
greater than 230.
7251 Short-circuited developer
thermistor
The sensor input sampling is
less than 69.
Service Manual
Related parts
Developer
thermistor
Front PWB Replace the front PWB
Engine PWB
Developer
thermistor
Front PWB Replace the front PWB
Engine PWB
1-4-114
Check procedures/
corrective measures
1. Confirm Developing is displayed by
U139 temperature and humidity (see
page 1-3-82).
2. 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)
3. If the wiring is disconnected, shorted or
grounded, replace the wiring.
4. 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).
1. Confirm Developing is displayed by
U139 temperature and humidity (see
page 1-3-82).
2. 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)
3. If the wiring is disconnected, shorted or
grounded, replace the wiring.
4. 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-