Brother MFC-9130CW Service Manual page 75

■ 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 the power OFF and ON again after several seconds to check if the error code
disappears.
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 Harness connection failure of the
eject sensor PCB
4 Harness connection failure of the
low-voltage power supply PCB
5 Eject sensor PCB failure
6 Fuser unit failure
7 Low-voltage power supply PCB
failure
8 Main PCB failure
Cause
2-36
Remedy
Check the harness connection of the
center or side thermistor of the fuser unit
and reconnect them.
Check the harness connection of the
heater of the fuser unit and reconnect it.
Check the harness connection of the eject
sensor PCB and reconnect it.
Check the harness connection of the
low-voltage power supply PCB and
reconnect it.
Replace the eject sensor PCB ASSY.
Replace the fuser unit.
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
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