2M8/2M9
1-4-21
6030 Broken fuser thermistor
wire
Input from fuser thermistor is
3 or less (A/D value) continu-
ously for 1 s.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Fuser unit and eject PWB (YC3)
Eject PWB (YC1) and engine PWB (YC19)
Deformed connec-
tor pin.
See page 1-4-21.
Defective triac. See page 1-4-21.
Broken fuser
thermistor wire.
Replace the fuser unit (see page 1-5-26).
Fuser thermostat
triggered.
Reinsert the fuser unit (see page 1-5-26).
Broken fuser
heater wire.
Replace the fuser unit (see page 1-5-26).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-27).
6000/
6020/
6030
Com-
bined
Broken fuser heater wire
Abnormally high fuser
thermistor temperature
Broken fuser thermistor
wire
Deformed connec-
tor pin.
If the I/F connector pins of the fuser unit and
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 TRA51 is of several Mega-Ohms
and not shorted (see figure 1-4-4). If failed,
replace the power source PWB (see page 1-
5-29).
Figure 1-4-2
Code Contents Causes
Check procedures/
corrective measures
T1
TRA51
Power source PWB
T2
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