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Confidential
■ Error code 050A
The center thermistor or side thermistor of the fuser unit detected some temperature error in
the hardware.
Error code 050B
When the temperature of the center thermistor of the fuser unit is lower than the idle
temperature, the side thermistor of the fuser unit detected a temperature higher than the
specified value.
Error code 050C
When the temperature of the center thermistor of the fuser unit is higher than the idle
temperature, the side thermistor of the fuser unit detected a temperature lower than the
specified value.
<User Check>
- Turn the power OFF and ON again after several seconds to check if the error code
disappears.
Print Unable 05
Turn the power off and then back on again.
Print Unable 05
Turn the power off and then back on again.
Print Unable 05
Turn the power off and then back on again.
Step Cause Remedy
1 Connection failure of the center
or side thermistor harness of the
fuser unit
Check the harness connection of the
center or side thermistor of the fuser unit
and reconnect them.
2 Connection failure of the heater
harness of the fuser unit
Check the harness connection of the
heater of the fuser unit and reconnect it.
3 Harness connection failure of the
eject sensor PCB
Check the harness connection of the eject
sensor PCB and reconnect it.
4 Harness connection failure of the
low-voltage power supply PCB
Check the harness connection of the
low-voltage power supply PCB and
reconnect it.
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.