Kyocera KM-6030 Service Manual page 199

2FB/2FC-4
Code
C6030 Fuser thermistor break error
• The fuser temperature remains at
lower then 1
tinuously when the fuser heater is on.
C6050 Fuser thermistor abnormal tempera-
ture detection
• During copying, the temperature at the
heat roller lower than 120
detected continuously for 5 s.
C6400 Zero-cross signal error
• The engine PWB does not detect the
zero-crossing signal (Z CROSS SIG)
for 5 s.
C7200 Broken internal thermistor wire
• The thermistor output value is 4.5 V or
more.
1-5-38
Contents
° °
C/33.8 F for 30 s con-
° °
C/248 F is
Causes Check procedures/corrective measures
Defective engine Replace the engine PWB.
PWB.
Defective AC Replace the AC power source PWB.
power source
PWB.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor M and S. If any problem is found,
thermistor M and S. repair it.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor M and S. If any problem is found,
thermistor M and S. repair it.
Operation on fuser Check for continuity. If none, replace the
thermostat. fuser thermostat.
Installation defec- Check the mounting state of the fuser ther-
tiveness on fuser mistor L, M and S. If any problem is found,
heater L, M or S. repair it.
Broken fuser Check for continuity. If none, replace the
heater L, M and S fuser heater L, M and S (see page 1-6-76).
wire.
Defective engine Replace the engine PWB.
PWB.
Defective AC Replace the AC power source PWB.
power source
PWB.
Poor contact in the Check the connection of connector YC11 on
connector termi- the engine PWB and YC6 on the DC power
nals. source PWB, and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective DC Check if the zero-crossing signal is output
power source from YC6-3 on the DC power source PWB.
PWB. If not, replace the DC power source PCB.
Defective engine Replace the engine PWB if C6400 is
PWB. detected while YC6-3 on the DC power
source PWB outputs the zero-crossing sig-
nal.
Poor contact in the Check the connection of connector YC23 on
connector termi- the engine PWB and the continuity across
nals. the connector terminals. Repair or replace if
necessary.
Defective develop- Replace the developing humidity sensor.
ing humidity sen-
sor.
Defective engine Replace the engine PWB.
PWB.
Remarks