Kyocera Mita KM-1530 Service Manual page 167

Code Contents
C620 Abnormally low fixing unit
thermistor temperature
• The fixing temperature remains below
100˚C/212˚F for 10 s during copying.
C630 Abnormally high fixing unit
thermistor temperature
• The fixing temperature exceeds
240˚C/464˚F for 10 s.
C710 Toner sensor problem
• The sensor output voltage is outside
the range of 0.5 to 4.5 V during toner
control.
• The toner sensor control voltage
cannot be set within the setting range
when maintenance item U130 is run.
C730 Broken external temperature
thermistor wire
• The input voltage is above 4.5 V.
Causes Check procedures/corrective measures
Fixing heater Check and reinstall if necessary.
installed
incorrectly.
Broken fixing Check for continuity. If none, replace fixing
heater wire. heater.
Poor contact in Check the connection of connector CN12
the fixing unit on the main PCB and the continuity across
thermistor the connector terminals. Remedy or
connector replace if necessary.
terminals.
Measure the resistance. If it is ∞ Ω, replace
Broken fixing unit
the fixing unit thermistor.
thermistor wire.
Fixing unit Check and reinstall if necessary.
thermistor
installed
incorrectly.
Fixing unit Check for continuity. If none, replace the
thermostat fixing unit thermostat. Check the operation
triggered. of the cooling fan and repair if necessary.
Measure the resistance. If it is 0 Ω, replace
Shorted fixing unit
thermistor. the fixing unit thermistor.
Broken fixing Replace the power source PCB.
heater control
circuit on the
power source
PCB.
Defective toner Replace the toner sensor.
sensor.
Poor contact of Reinsert the connector. Also check for
the toner sensor continuity within the connector cable. If
connector none, repair or replace the cable.
terminals.
Developer Replace the developer.
problem.
Poor contact of Reinsert the connector. Also check for
the humidity continuity within the connector cable. If
sensor PCB none, repair or replace the cable.
connector
terminals.
Defective external Replace the humidity sensor PCB.
temperature
thermistor.
Remarks
2AV/X
1-5
1-5-15