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C6400 6000 on Kyocera Mita KM1500

Wednesday, February 13, 2013
Almost all kyocera Mita products display error message C6XXX whenever a problem is detected in fixing temperature or fixing unit. C6000/C6200/C6050 and C6400 all are related to fixing unit. Service manual states that possible causes are as below:
C6000 & C6050
  • Poor contact in the thermistor connector terminal.
  • Thermistor installed incorrectly.
  • Thermal cutout triggered.
  • Heater lamp installed incorrectly.
  • Broken heater wire.
C6020
  • Shored thermistor
  • Broken heater control circuit on the power supply board.
C6400
  • Poor contact in the connector terminals. Check the connection of connectors CY7 on the engine board and CN2 on the power supply board.
  • Defective power supply board.
  • Defective engine board.
Sometimes only an unstable power source is the cause of these error messages.
How to reset:
  1. Press the Stop/clear (red) key, Start (green) key and the left copy exposure key in the order presented and hold them down.
  2. Release the keys and than press Stop/clear key again (within few seconds).
  3. Using the copy exposure adjustment keys or the Zoom +/- keys go to mode U163.
  4. Press the start key.
  5. If prompted (Im not sure) confirm that you want to reset the fixing data.
  6. Here you go.

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