Kyocera KM-2550 Service Manual page 153

Code
C6000 Broken fixing heater wire
The temperature does not become
° °
100 C/212 F even if 30 s pass before
secondary stabilization.
When there is no 1
before secondary stabilization.
C6020 Abnormally high fixing unit ther-
mistor temperature
The fixing temperature exceeds 240
°
464 F for 40 ms.
C6050 Abnormally low fixing unit thermistor
temperature
The fixing temperature remains below
° °
90 C/194 F for 1 s.
C6400 Zero-crossing signal problem
The engine PCB does not detect the
zero-crossing signal for the time speci-
fied below. At power-on: 3 s Others: 5 s
Contents
° °
C/33.8 F rise in 5 s
°
C/
Causes Check procedures/corrective measures
Poor contact in the Reinsert the connector. Also check for conti-
thermistor connec- nuity within the connector cable. If none,
tor terminals. remedy or replace the cable.
Fixing thermistor Check and reinstall if necessary.
installed incor-
rectly.
Fixing thermostat Check for continuity. If none, replace the fix-
triggered. ing thermostat.
Fixing heater M or Check and reinstall if necessary.
S installed incor-
rectly.
Broken fixing Check for continuity. If none, replace the fix-
heater M or S wire. ing heater M or S.
Shorted thermistor. Measure the resistance. If it is 0 Ω, replace
the thermistor.
Broken heater con- Replace the power supply PCB and check
trol circuit on the for correct operation.
power supply PCB.
Poor contact in the Reinsert the connector. Also check for conti-
thermistor connec- nuity within the connector cable. If none,
tor terminals. remedy or replace the cable.
Measure the resistance. If it is ∞ Ω, replace
Broken fixing ther-
mistor wire. the fixing thermistor.
Fixing thermistor Check and reinstall if necessary.
installed incor-
rectly.
Fixing thermostat Check for continuity. If none, replace the fix-
triggered. ing thermostat.
Fixing heater M or Check and reinstall if necessary.
S installed incor-
rectly.
Broken fixing Check for continuity. If none, replace the fix-
heater M or S wire. ing heater M or S.
Poor contact in the Reinsert the connector. Also check for conti-
connector termi- nuity within the connector cable. If none,
nals. remedy or replace the cable.
Defective power Check if the zero-crossing signal is output
supply PCB. from YC2-5 on the power supply PCB. If not,
replace the power supply PCB.
Defective engine Replace the engine PCB if C6400 is
PCB. detected while YC2-5 on the power supply
PCB outputs the zero-crossing signal.
Remarks
2FT-1
1-5-23