Kyocera ECOSYS FS-4300DN Service Manual page 78

Code Contents
6020 Abnormally high fuser
thermistor 2 temperature
(60/50/45 ppm model only)
The detection temperature of
fuser thermistor 2 is higher
than 235°C/455°F.
In a heater-off state, the
detection temperature of fuser
thermistor 2 is higher than
195°C/383°F after the detec-
tion temperature of fuser
thermistor 2 was 155°C/311°F
or less.
6030 Broken fuser thermistor 2
wire
(60/50/45 ppm model only)
A/D value of the fuser thermis-
tor 2 exceeds 1019 bit contin-
uously for 4 s during warming
up.
Causes
Deformed connec- See page 1-4-19.
tor pin.
Defective triac. See page 1-4-19.
Shorted fuser Replace the fuser unit (see page 1-5-19).
thermistor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
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 thermistor and fuser thermistor con-
nect PWB
Fuser thermistor connect PWB and engine
PWB (YC21)
Deformed connec- See page 1-4-19.
tor pin.
Defective triac. See page 1-4-19.
Defective fuser Replace the fuser unit (see page 1-5-19).
thermistor.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-22).
1-4-18
2LV/2L1/2L2/2MS/2MT
Check procedures/
corrective measures