Kyocera TASKalfa 4500i Service Manual page 340

Code Contents
4201 BD steady-state error
The BD signal is not detected.
5101 Main high-voltage error
Measure the inflowing current
when Vpp is varied in 3 steps
and verify if the difference of
the currents of 0 and step 2 is
less than 42 (51 if lower high-
voltage board).
6000 Broken fuser heater wire
Fuser thermistor 1 does not
reach 100° C/212 °F even
after 30 s during warming up.
The detected temperature of
fuser thermistor 1 does not
reach the specified tempera-
ture (ready indication temper-
ature) for 420 s in warming up
after reached to 100° C/212
°F.
A temperature of less than
80°C/176 °F was observed at
the fuser thermistor 1 when
the temperature at the fuser
thermistor 2 reached 100°C/
212 °F after warming up.
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. Laser scanner unit and LSU relay PWB
(YC3)
LSU relay PWB (YC2) and engine PWB
(YC11)
Defective PD Replace the laser scanner unit (see page 1-
PWB. 5-24).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-47).
Improper installa- Reinstall the charger roller unit.
tion charger roller
unit.
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. High voltage PWB (YC2) and engine PWB
(YC16)
Defective high volt- Replace the high voltage PWB and check
age PWB. for correct operation (see page 1-5-52).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-47).
Reinsert the connector. Also check for conti-
Defective connec-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Power source PWB (YC3) and fuser heater
PWB (YC3)
Fuser heater PWB (YC2) and feed PWB 1
(YC27)
Feed PWB 1 (YC1) and engine PWB (YC6)
Deformed connec- See page 1-4-40.
tor pin.
Defective triac. See page 1-4-40.
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).
1-4-36
2LL/2LJ/2LH-1
Check procedures/
corrective measures