2MV
1-4-28
6230 Fuser thermistor 1 (edge)
break error
During warming up a hearter,
fuser thermistor 2 detects a
temperature of 100 °C/212 °F
or higher and, fuser thermistor
1 detects a temperature of 37
°C/99 °F or lower.
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 1 and fuser PWB (YC3)
Fuser unit and engine PWB (YC22)
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 fuser
thermistor.
Replace the fuser unit (see page 1-5-18).
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-45).
6250 Abnormally low fuser
thermistor 1 (edge) temper-
ature
The fuser temperature lower
than 80 °C/176 °F is detected
continuously for 1 s during
printing.
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 fuser
thermistor.
Replace the fuser unit (see page 1-5-18).
Defective fuser
heater.
Defective PWB. Replace the IH PWB or the engine PWB and
check for correct operation (see page 1-5-
53, 1-5-45).
6410
Fuser unit type mismatch
problem
Absence of the fuser unit is
detected.
Fuser unit connec-
tor inserted incor-
rectly.
Reinsert the fuser unit connector if neces-
sary.
Different type of
the fuser unit is
installed.
Install the correct fuser unit
(see page 1-5-18).
6600 Belt rotation error
The belt was detected to stop
for 2 s continuously during
motor remote is on.
Defective fuser
motor.
Replace the fuser motor.
Defective IH belt. Replace the fuser unit (see page 1-5-18).
Defective IH PWB. Replace the IH PWB and check for correct
operation (see page 1-5-53).
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-45).
6710 CPU thermal runaway
(IHPWB)
Defective PWB. Replace the IH PWB and check
for correct operation (see page 1-5-53).
Code Contents Causes
Check procedures/
corrective measures
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