Kyocera KM-1650 Service Manual page 152

Code
C6000 Broken fixing heater wire
In fixing warm-up, the time to reach
° °
50 C/122 F exceeds 13.5 s, the time to
°
reach 100 C/212
time to reach the primary stabilization
exceeds 10 s or the time to reach the
secondary stabilization exceeds 24 s.
C6020 Abnormally high fixing unit ther-
mistor temperature
The fixing temperature exceeds 230
°
446 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
C7800 Broken external temperature ther-
mistor
The input voltage is 0.5 V or less.
Contents
°
F exceeds 10 s, the
°
C/
Causes Check procedures/corrective measures
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.
Poor contact in the Reinsert the connector. Also check for conti-
humidity sensor nuity within the connector cable. If none,
connector termi- remedy or replace the cable.
nals.
Defective humidity Replace the drawer PCB and check for cor-
sensor. rect operation.
Remarks
2DA/2DB
1-5-23