2P7/2R0/3PN
1-4-17
6030 Broken fuser thermistor 2
wire
A/D value of the fuser thermis-
tor 2 exceeds 1019 bit contin-
uously for 4 s during warming
up.
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 thermistor and fuser thermistor con-
nect PWB
Fuser thermistor connect PWB and engine
PWB (YC21)
Deformed connec-
tor pin.
See page 1-4-17.
Defective triac. See page 1-4-17.
Defective fuser
thermistor.
Replace the fuser unit (see page 1-5-27).
Defective engine
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-40).
6000/
6020/
6030/
6120/
6130/
Com-
bined
Broken fuser heater wire
Abnormally high fuser
thermistor 2 temperature
Broken fuser thermistor 2
wire
Abnormally high fuser
thermistor 1 temperature
Broken fuser thermistor 1
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, replace the connectors or the units
including the connectors.
Defective triac. Remove the power cord and check that the
resistance between terminals T1 and T2 of
the triac TRA31 and triac TRA41 are of sev-
eral Mega-Ohms and not shorted (see figure
1-4-3).
If failed, replace the power source PWB (see
page 1-5-48).
Figure 1-4-3
Code Contents Causes
Check procedures/
corrective measures
T1
T2
TRA41
TRA31
Power source PWB
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