Olivetti d-Copia 3500MF Service Manual page 278

Code Contents
6250 Abnormally low fuser
thermistor 2 temperature
Fuser thermistor 2 detects a
temperature lower than 50°C/
122°F for 1 s after warming
up.
6400 Zero-cross signal error
While fuser heater ON/OFF
control is performed, the zero-
cross signal is not input within
3 s.
6000 Broken fuser heater wire
6020 Abnormally high fuser
thermistor 1 temperature
6030 Broken fuser thermistor 1
wire
6040 Fuser heater error
6050 Abnormally low fuser
thermistor 1 temperature
6200 Broken fuser edge heater
wire
6220 Abnormally high fuser
thermistor 2 temperature
6230 Broken fuser thermistor 2
wire
6250 Abnormally low fuser
thermistor 2 temperature
Com-
bined
Service Manual
Causes
Deformed connec- See page 1-4-36.
tor pin.
Defective triac. See page 1-4-36.
Defective fuser Replace the fuser unit (see page 1-5-36).
thermistor 2.
Defective fuser Replace the fuser unit (see page 1-5-36).
heater.
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. Fuser heater PWB (YC29) and feed PWB 1
(YC27)
Defective fuser Replace the fuser heater PWB and check for
heater PWB. correct operation.
Deformed connec- If the I/F connector pins of the fuser unit and
tor pin. the main unit are deformed owing to foreign
matters, such as paper dusts, replace the
connectors or the units including the con-
nectors.
Defective triac. Remove the power cord and check that the
resistance between terminals T1 and T2 of
the triac CR001 is of several Mega-Ohms
and not shorted (see figure 1-4-4). If failed,
replace the power source PWB (see page 1-
5-45).
CR001
Power source PWB
1-4-36
Check procedures/
corrective measures
T1
T2
Figure 1-4-4
2LL/2LJ/2LH
Y113350-5