Kyocera KM-4230 Service Manual page 431

2A3/4
Code Contents
C401 Polygon motor steady-
state problem
• The polygon motor rotation
is not stable for 600 ms af-
ter the polygon motor rota-
tion has been stabilized.
C420 BD steady-state problem
• The VTC detects a BD er-
ror for 600 ms after the
polygon motor rotation has
been stabilized.
C510 Main charger problem
• MC ALM signal is detected
continuously for 400 ms
when MC REM signal is
turned on.
C511 Transfer/separation high-
voltage problem
• STALM signal is detected
continuously for 400 ms
when TC/SC REM signal is
turned on.
C610 Broken fixing unit ther-
mistor wire
• The fixing temperature
does not increase for 40 s
after the fixing heaters
have been turned on for
warming up.
• The fixing temperature re-
mains below 50˚C/122˚F
for 10 s continuously after
the fixing heaters have
been turned on during sta-
bilization.
3-5-12
Causes
Defective Check if 24 V DC is supplied
power source to CN6-5 on the engine PCB.
PCB. If not, replace the power
source PCB.
Defective en- Check if 24 V DC is output
gine PCB. from CN7-1 on the engine
PCB. If not, replace the engine
PCB.
Defective laser Replace the LSU.
diode.
Defective poly- Replace the LSU.
gon motor.
Defective main Replace the main PCB.
PCB.
Defective high- Replace the high-voltage
voltage trans- transformer PCB.
former PCB.
Leakage during Check and clean the main
main charging. charger assembly.
Defective high- Replace the high-voltage
voltage trans- transformer PCB.
former PCB.
Leakage during Check and clean the transfer
transfer/sepa- charger assembly.
ration charging.
Poor contact of Check the connection of con-
the fixing unit nector CN3-B8 on the engine
thermistor con- PCB and the continuity across
nector termi- the connector terminals. Re-
nals. pair or replace if necessary.
Broken fixing Measure the resistance. If it is
unit thermistor infinite, replace the fixing unit
wire. thermistor.
Fixing unit ther- Check and reinstall if neces-
mistor installed sary.
incorrectly.
Fixing unit ther- Check for continuity. If none,
mostat replace the fixing unit thermo-
triggered. stat.
Remarks
Check procedures/
corrective measures