Kyocera Mita KM-2530 Service Manual page 189

Code Contents
C4010 Polygon motor steady-state problem
• When high-speed rotation from low-
speed rotation is requested, the motor
does not become stable even after 20
s.
C4200 BD steady-state problem
• The VTC detects a BD error for 600
ms after the polygon motor rotation
has been stabilized.
C5300 Broken cleaning lamp wire
While the cleaning lamp is on, the bro-
ken cleaning lamp wire detection signal
is detected for 2 s continuously.
C6000 Broken fixing heater wire
• After secondary stabilization, de-
tected temperature of the fixing ther-
mistor is lower than 100 °C/212 °F
• When the fixing heater is turned on,
the output voltage of terminal CN2-1
of the power supply PCB is lower
than 0.2 V.
• 7 s after the fixing heater is turned on,
the output voltage of terminal CN2-1
of the power supply PCB is lower
than 0.2 V.
• When the output voltage of terminal
CN 2-1 of the power supply PCB is
checked every 45 s during continuous
copying, the voltage becomes lower
than 0.2 V.
• When the fixing temperature be-
comes lower than 140 °C/284 °F dur-
ing copying, the output voltage of ter-
minal CN 2-1 of the power supply
PCB is checked and the voltage is
lower than 0.2 V.
C6020 Abnormally high fixing unit thermis-
tor temperature
• The fixing thermistor detects tempera-
ture 240 °C/464 °F or higher.
Causes Check procedures/corrective measures
Poor contact in Reinsert the connector. Also check for con-
the polygon motor tinuity within the connector cable. If none,
connector termi- remedy or replace the cable.
nals.
Defective polygon Replace the LSU (see page 1-6-20).
motor.
Defective power Check if 24 V DC is supplied to CN2-1 on
source PCB. the main PCB. If not, replace the power
source PCB.
Defective main Check if 24 V DC is output from CN8-10 on
PCB. the main PCB. If not, replace the main PCB.
Defective laser Replace the LSU (see page 1-6-20).
diode.
Defective polygon Replace the LSU (see page 1-6-20).
motor.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
Defective cleaning Replace the cleaning lamp.
lamp.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
Poor contact in Check the connection of connector CN10
the fixing unit on the main PCB and the continuity across
thermistor con- the connector terminals. Repair or replace
nector terminals. if necessary.
Fixing unit ther- Check and reinstall if necessary.
mistor installed
incorrectly.
Fixing unit ther- Check for continuity. If none, replace the
mostat triggered. fixing unit thermostat.
Fixing unit heater Check and reinstall if necessary.
M or S installed
incorrectly.
Broken fixing unit Check for continuity. If none, replace the
heater M or S fixing unit heater M or S (see page 1-6-38).
wire.
Measure the resistance. If it is 0 Ω, replace
Shorted fixing unit
thermistor. the fixing unit thermistor.
Broken fixing unit Replace the power source PCB.
heater control cir-
cuit on the power
source PCB.
Remarks
2DF
1-5-35