Kyocera KM-2020

2C9-2
1-5-18
Code Contents
Remarks
Causes Check procedures/corrective measures
C4200
(A4200*)
C6000
C6020
C6050
BD steady-state problem
• The MIC detects a BD error for 600
ms after the polygon motor rotation
has been stabilized.
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 °F exceeds 10 s,
the time to reach the primary stabili-
zation exceeds 10 s or the time to
reach the secondary stabilization ex-
ceeds 24 s.
Abnormally high fixing unit ther-
mistor temperature
• The fixing temperature exceeds
230°C/446 °F for 40 ms.
Abnormally low fixing unit ther-
mistor temperature
• The fixing temperature remains below
90°C/194°F for 1 s.
Defective laser
diode.
Defective polygon
motor.
Defective main
PCB.
Defective engine
PCB.
Poor contact in
the thermistor
connector termi-
nals.
Fixing thermistor
installed incor-
rectly.
Fixing thermostat
triggered.
Fixing heater M or
S installed incor-
rectly.
Broken fixing
heater M or S
wire.
Shorted ther-
mistor.
Broken heater
control circuit on
the power supply
PCB.
Poor contact in
the thermistor
connector termi-
nals.
Broken fixing ther-
mistor wire.
Fixing thermistor
installed incor-
rectly.
Fixing thermostat
triggered.
Fixing heater M or
S installed incor-
rectly.
Broken fixing
heater M or S
wire.
Replace the LSU.
Replace the LSU.
Replace the main PCB and check for cor-
rect operation.
Replace the engine PCB and check for
correct operation.
Reinsert the connector. Also check for con-
tinuity within the connector cable. If none,
remedy or replace the cable.
Check and reinstall if necessary.
Check for continuity. If none, replace the
fixing thermostat.
Check and reinstall if necessary.
Check for continuity. If none, replace the
heater lamp.
Measure the resistance. If it is 0 Ω, replace
the thermistor.
Replace the power supply PCB and check
for correct operation.
Reinsert the connector. Also check for con-
tinuity within the connector cable. If none,
remedy or replace the cable.
Measure the resistance. If it is ∞ Ω, replace
the fixing thermistor.
Check and reinstall if necessary.
Check for continuity. If none, replace the
fixing thermostat.
Check and reinstall if necessary.
Check for continuity. If none, replace the
fixing heater M or S.
“A” is displayed on the operation panel.