6020 Abnormally High Temperature Fuser Heater Lamp; 6030 Broken Fuser Thermistor Wire; 6400 Zero Cross Signal Error - Kyocera FS-C5350DN Service Manual

2K8
Code
6020 Abnormally high temperature fuser
heater lamp
The fuser thermistor detects a tempera-
ture higher than 240
By the activation of the high temperature
error detection circuit (230
more) of fuser thermistor, the illumination
of fuser heater lamp was forcibly turned
off and 10 seconds has elapsed.
6030 Broken fuser thermistor wire
Input from fuser thermistor is 3 or less
(A/D value) continuously for 1.1 second
(11 ms × 100 times).
6400 Zero cross signal error
The zero cross signal does not reach the
engine PWB for specified time.
1-4-14
Contents
° °
C/464 F.
° °
C/446 F or
Causes Check procedures/corrective measures
Shorted fuser ther- Replace the fuser unit (See page 1-5-25).
mistor.
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Defective harness Reinsert the connector. Also check for conti-
between fuser ther- nuity within the connector harness. If none,
mistor and paper remedy or replace the harness.
exit PWB (YC4), or
improper connec-
tor insertion.
Defective harness Reinsert the connector. Also check for conti-
between paper exit nuity within the connector harness. If none,
PWB (YC1) and remedy or replace the harness.
engine PWB
(YC20), or
improper connec-
tor insertion.
Broken fuser ther- Replace the fuser unit (See page 1-5-25).
mistor wire.
Fuser thermistor Replace the fuser unit (See page 1-5-25).
installed incor-
rectly.
Fuser thermal cut- Replace the fuser unit (See page 1-5-25).
out triggered.
Fuser heater lamp Replace the fuser unit (See page 1-5-25).
installed incor-
rectly.
Broken fuser Replace the fuser unit (See page 1-5-25).
heater lamp wire.
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Defective harness Reinsert the connector. Also check for conti-
between power nuity within the connector harness. If none,
source PWB remedy or replace the harness.
(YC103) and
engine PWB
(YC19), or
improper connec-
tor insertion.
Defective power Replace the power source PWB (See page
source PWB. 1-5-26).
Defective engine Replace the engine PWB (See page 1-5-
PWB. 29).
Remarks