Olivetti PG L2555 Service Manual page 87

Code Contents
6120 Abnormally high fuser
thermistor 1 temperature
The detection temperature of
fuser thermistor 1 is higher
than 245°C/473°F.
In a heater-off state, the
detection temperature of fuser
thermistor 1 is higher than
195°C/383°F after the detec-
tion temperature of fuser
thermistor 1 was 155°C/311°F
or less.
6130 Broken fuser thermistor 1
wire
A/D value of the fuser thermis-
tor 1 exceeds 1019 bit contin-
uously for 4 s during warming
up.
6400 Zero-cross signal error
While fuser heater control is
performed, the zero-cross sig-
nal is not input within 2 s.
Causes
Deformed connec- See page 1-4-19.
tor pin.
Defective triac. See page 1-4-19.
Shorted fuser Replace the fuser unit (see page 1-5-19).
thermistor.
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. Fuser thermistor and fuser thermistor con-
nect PWB(YC1)
Fuser thermistor connect PWB(YC3) and
engine PWB (YC21)
Deformed connec- See page 1-4-19.
tor pin.
Defective triac. See page 1-4-19.
Defective fuser Replace the fuser unit (see page 1-5-19).
thermistor.
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. Power source PWB (YC3) and engine PWB
(YC1)
Defective power Replace the power source PWB or the
source PWB or engine PWB and check for correct operation
engine PWB. (see page 1-5-22).
1-4-20
Check procedures/
corrective measures