Kyocera KM-6030 - Page 199

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