Brother HL-4140CN Service Manual page 100

■ Error code AA
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Error code AB
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Error code AE
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Error code B5
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Error code B6
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Error code BA
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Error code BE
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This error does not usually occur in the normal use. The conceivable causes are noise around
the installation site, fluctuation of the power supply voltage, and failures in the software.
<User Check>
- Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
Cause
2-69
Remedy
Replace the main PCB ASSY.
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