Brother DCP-9055CDN Service Manual page 118

■ Error code AB
Scanner Error
Scanning resolution change error in the maintenance mode.
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
■ Error code AC
Scan Unable AC
Remove the original document. Turn the power off, then on again.
Scanning failure upon FAX transmission. (Second side)
Step
1 Second side scanning CIS
failure
2 Main PCB failure
■ Error code AD
Scan Unable AD
Remove the original document. Turn the power off, then on again.
Timeout error during waiting for completion of scanning DMA transfer.
Step
1 Document scanner unit failure
2 Main PCB failure
Cause
Cause
Cause
2-80
Remedy
Replace the main PCB ASSY.
Remedy
Replace the upper document chute ASSY.
Replace the main PCB ASSY.
Remedy
Replace the document scanner unit.
Replace the main PCB ASSY.
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