Brother HL-4140CN Service Manual page 59

■ Error code 27
Print Unable 27
Turn the power off and then back on again.
PF drive motor error.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
Step
1 Harness connection failure of
PF drive motor
2 PF drive motor failure
3 Engine PCB failure
4 Low-voltage power supply PCB
failure
5 Main PCB failure
■ Error code 28
Print Unable 28
Turn the power off and then back on again.
Drum drive motor error.
<User Check>
- If paper or any other foreign object is affixed to the exposure roller of the drum, remove it.
Step
1 Harness connection failure of
drum drive motor
2 Drum drive motor failure
3 Engine PCB failure
4 Low-voltage power supply PCB
failure
5 Main PCB failure
Cause
Cause
2-28
Remedy
Check the harness connection of the
PF drive motor and reconnect it.
Replace the PF plate ASSY.
Replace the engine PCB ASSY.
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY
Remedy
Check the harness connection of the
drum drive motor and reconnect it.
Replace the drum drive motor.
Replace the engine PCB ASSY.
Replace the low-voltage power supply
PCB ASSY.
Replace the main PCB ASSY.
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