Main High-Voltage Error M; Main High-Voltage Error Y; Broken Fuser Heater Wire; Abnormally High Fuser Thermistor 1 Temperature - Kyocera FS-C8600DN Service Manual

Code Contents
5103

Main high-voltage error M

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).
5104

Main high-voltage error Y

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 60 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.
6020 Abnormally high fuser
thermistor 1 temperature
Fuser thermistor 1 detects a
temperature higher than
240°C/464°F for 1 s.
Causes
Improper installa- Reinstall the charger roller unit M.
tion charger roller
unit M.
Defective connec-
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
tor cable or poor
replace the cable.
contact in the con-
High voltage PWB 1 (YC3) and engine PWB
nector.
(YC17)
Defective high volt- Replace the high voltage PWB 1 and check
age PWB 1. for correct operation (see page 1-5-54).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-49).
Improper installa- Reinstall the charger roller unit Y.
tion charger roller
unit Y.
Defective connec- Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
tor cable or poor
replace the cable.
contact in the con-
High voltage PWB 1 (YC1) and engine PWB
nector.
(YC16)
Defective high volt- Replace the high voltage PWB 1 and check
age PWB 1. for correct operation (see page 1-5-54).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-49).
Defective connec- Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
tor cable or poor
replace the cable.
contact in the con-
Power source PWB (YC3) and fuser IH PWB
nector.
(YC1)
Fuser IH PWB (YC4) and engine PWB
(YC26)
Fuser thermostat Replace the fuser unit (see page 1-5-40).
triggered.
Defective fuser IH. Replace the fuser unit (see page 1-5-40).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-49).
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.
Fuser unit and engine PWB (YC26)
nector.
Shorted fuser Replace the fuser unit (see page 1-5-40).
thermistor 1.
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-49).
1-4-51
Check procedures/
corrective measures
2MN/2N1