Kyocera TASKalfa 2551ci Service Manual page 347

Code Contents
6150 Abnormally low fuser
thermistor 3 (press roller)
temperature
The fuser temperature lower
than 30 °C/86 °F is detected
continuously for 1 s.
6200 Broken fuser edge heater
wire
Fuser thermistor 1 does not
reach 50° C/122 °F even
after20 s during warming up.
The detected temperature of
fuser thermistor1 does not
reach the specified tempera-
ture (ready indication temper-
ature) for 60 s in warming up
after reaching 50° C/122 °F.
6220 Abnormally high fuser
thermistor 1 (edge) temper-
ature
The fuser temperature
exceeds 240 °C/464 °F for 1
s.
Causes
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 fuser Replace the fuser unit (see page 1-5-17).
thermistor.
Defective fuser
heater.
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-39).
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. IH coil unit and IHPWB
IHPWB and engine PWB (YC30)
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.
Fuser thermostat Reinsert the fuser unit (see page 1-5-17).
triggered.
Broken fuser
heater wire.
Defective PWB. Replace the IH PWB or the engine PWB and
check for correct operation (see page 1-5-
57, 1-5-39).
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 cooling Replace the fuser fan motor.
fan motor.
Defective fuser Replace the fuser unit (see page 1-5-17).
thermistor.
Defective PWB. Replace the engine PWB and check for cor-
rect operation (see page 1-5-39).
1-4-40
Check procedures/
corrective measures
2NP