Brother HL-4040CN Service Manual page 28

Error code 25
Print Unable 25
Turn the power off and then back on again.
Develop drive motor failure
Error code 26
Print Unable 26
Turn the power off and then back on again.
Belt drive motor failure
Error code 27
Print Unable 27
Turn the power off and then back on again.
Paper feed/belt cleaner motor failure
Step
1 Motor harness connection
failure
2 Motor failure
3 Engine PCB failure
4 Low-voltage power supply
PCB failure
Error code 28
Print Unable 28
Turn the power off and then back on again.
Drum drive motor 1 (K, Y) failure
Error code 29
Print Unable 29
Turn the power off and then back on again.
Drum drive motor 2 (M, C) failure
Step
1 Drum drive motor harness
connection failure
2 Drum phase sensor PCB
failure
3 Drum drive motor failure
4 Engine PCB failure
Cause
Check the harness connection of the appropriate
motor and reconnect it.
Replace the appropriate motor.
Replace the engine PCB ASSY.
Replace the PS PCB unit.
Cause
Check the harness connection of the drum drive
motor and reconnect it.
Replace the drum phase sensor PCB ASSY.
Replace the drum drive motor.
Replace the engine PCB ASSY.
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Remedy
Remedy
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