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Error code 050A
The hardware detected a temperature error through the center thermistor or the side
thermistor of the fuser unit.
Error code 050B
When the center thermistor of the fuser unit was lower than the idle temperature, the side
thermistor detected a temperature higher than the specified temperature.
Error code 050C
When the center thermistor of the fuser unit was higher than the idle temperature, the side
thermistor detected a temperature lower than the specified temperature.
Error code 0800
An error occurred in the internal temperature sensor.
<User Check>
• Turn OFF the power switch. After several seconds, turn ON the power again and check
that this error is reset.
Step Cause Remedy
1
Connection failure of the center
or side thermistor harness of the
fuser unit
Reconnect the center or side thermistor
harness of the fuser unit.
2
Connection failure of the fuser
unit heater harness
Reconnect the fuser unit heater harness.
3
Connection failure of the eject
sensor harness
Reconnect the eject sensor harness.
4
Connection failure of the low-
voltage power supply harness
Reconnect the low-voltage power supply
harness.
5 Eject sensor PCB failure Replace the eject sensor PCB ASSY.
6 Fuser unit failure Replace the fuser unit.
7
Low-voltage power supply PCB
failure
Replace the low-voltage power supply PCB
ASSY.
8 Main PCB failure Replace the main PCB ASSY.
Step Cause Remedy
1
Connection failure of the internal
temperature sensor harness
Reconnect the internal temperature sensor
harness.
2
Internal temperature sensor
failure
Replace the main frame L ASSY.
3 Main PCB failure Replace the main PCB ASSY.
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