Kyocera TASKalfa 4500i Service Manual page 343

Code Contents
6230 Broken fuser thermistor 2
wire
The Input signal from the
fuser thermistor 2 is 992 or
more (A/D value) continuously
for 1 s when the temperature
at the fuser thermistor 1 is
greater than 100?/212°F dur-
ing warming up.
Fuser thermistor 2 detects a
temperature lower than 50°C/
122°F for 15 s during warming
up.
6250 Abnormally low fuser
thermistor 2 temperature
Fuser thermistor 2 detects a
temperature lower than
100C/212F for 1 s during
ready or print.
Fuser thermistor 2 detects a
temperature lower than 50C/
122F for 1 s during 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.
Causes
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 unit and engine PWB (YC26)
Deformed connec- See page 1-4-40.
tor pin.
Defective triac. See page 1-4-40.
Broken fuser Replace the fuser unit (see page 1-5-39).
thermistor 2 wire.
Fuser thermostat Replace the fuser unit (see page 1-5-39).
triggered.
Defective fuser Replace the fuser unit (see page 1-5-39).
heater.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-47).
Deformed connec- See page 1-4-40.
tor pin.
Defective triac. See page 1-4-40.
Defective fuser Replace the fuser unit (see page 1-5-39).
thermistor 2.
Defective fuser Replace the fuser unit (see page 1-5-39).
heater.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-47).
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.
1-4-39
2LL/2LJ/2LH-2
Check procedures/
corrective measures