Olivetti PG L2555 Service Manual page 88

Code Contents
7100 Toner sensor error
Sensor output value of 930 or
more continuously for 5 s.
7400 Developer unit non-install-
ing error
Sensor output value of 31 or
less continuously for 5 s.
7410 Drum unit type mismatch
error
The drum PWB EEPROM
does not communicate
normally.
Absence of the drum unit
is detected.
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. Toner sensor and drum PWB (YC3)
Drum connect PWB(YC2) and relay-L PWB
(YC3)
Relay-L PWB(YC1) and engine PWB (YC2)
Defective toner Replace the developer unit.
sensor. (See Page 1-5-13)
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
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. Toner sensor and drum PWB (YC3)
Drum connect PWB(YC2) and relay-L PWB
(YC3)
Relay-L PWB(YC1) and engine PWB (YC2)
Defective toner Replace the developer unit.
sensor. (See Page 1-5-13)
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
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 unit and drum connect PWB (YC1)
Drum connect PWB(YC2) and relay-L PWB
(YC3)
Relay-L PWB(YC1) and engine PWB (YC2)
Defective toner Replace the drum unit.
sensor. (See Page 1-5-13)
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
1-4-21
Check procedures/
corrective measures