Kyocera Mita KM-1530 Service Manual page 166

2AV/X
Code
C401 Polygon motor steady-state problem
• The polygon motor rotation is not
stable for 400 ms after the polygon
motor rotation has been stabilized.
C420 BD steady-state problem
• The VTC detects a BD error for 800
ms after the polygon motor rotation
has been stabilizad.
C510 Main charger problem
• MC ALM signal is detected
continuously for 800 ms when MC
REM signal is turned on.
1-5
C610 Broken fixing heater wire
• Warm-up does not end within 90 s.
• The secondary stabilization fixing
temperature drops to 100°C/212°F or
below.
• The fixing temperature remains below
40˚C/104˚F for 7 s or longer after the
fixing heaters have been turned on.
1-5-14
Contents
Poor contact of
the polygon motor
connector
terminals.
Defective power
source PCB.
Poor contact of
the laser scanner
unit connector
terminals.
Defective LSU.
Defective main
PCB.
Poor contact of
the high-voltage
transformer PCB
connector
terminals.
Defective high-
voltage
transformer PCB.
Leakage during
main charging.
Deformed high-
voltage
transformer PCB
terminal spring.
Fixing heater
installed
incorrectly.
Broken fixing
heater wire.
Poor contact in
the fixing unit
thermistor
connector
terminals.
Broken fixing unit
thermistor wire.
Fixing unit
thermistor
installed
incorrectly.
Fixing unit
thermostat
triggered.
Remarks
Causes Check procedures/corrective measures
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.
Check if 24 V DC is present at CN3-1 and
CN3-2 on the power source PCB. If not,
replace the power source PCB.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.
Replace the LSU.
Replace the main PCB and check for
correct operation.
Reinsert the connector. Also check for
continuity within the connector cable. If
none, repair or replace the cable.
Replace the high-voltage transformer
PCB.
Check and clean the main charger
assembly.
Replace the spring.
Check and reinstall if necessary.
Check for continuity. If none, replace fixing
heater.
Check the connection of connector CN12
on the main PCB and the continuity across
the connector terminals. Remedy or
replace if necessary.
Measure the resistance. If it is ∞ Ω, replace
the fixing unit thermistor.
Check and reinstall if necessary.
Check for continuity. If none, replace the
fixing unit thermostat. Check the operation
of the cooling fan and repair if necessary.