Brother HL-L8250CDN Service Manual page 65

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Error code 050A
Print Unable 05
Turn the power off and then back on again.
The center thermistor or side thermistor of the fuser unit detected some temperature error in
the hardware.
Error code 050B
Print Unable 05
Turn the power off and then back on again.
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
Print Unable 05
Turn the power off and then back on again.
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 OFF the power switch. After several seconds, turn ON the power again and check that
this error is reset.
Step
1 Connection failure of the center
or side thermistor harness of the
fuser unit
2 Connection failure of the heater
harness of the fuser unit
3 Connection failure of the eject
sensor PCB harness
4 Connection failure of the
low-voltage power supply PCB
harness
5 Eject sensor PCB failure
6 Fuser unit failure
7 Low-voltage power supply PCB
failure
8 Main PCB failure
Cause
2-42
Remedy
Reconnect the harness of the center
thermistor or side thermistor of the fuser
unit.
Reconnect the heater harness of the fuser
unit.
Reconnect the eject sensor PCB harness.
Reconnect the low-voltage power supply
PCB harness.
Replace the eject sensor PCB ASSY.
Replace the fuser unit.
Replace the low-voltage power supply
PCB unit.
Replace the main PCB ASSY.
Confidential