Brother DCP-9040CN Service Manual page 49

Error code B9
SCANNER ERROR
Scanning light adjustment error is detected.
* This error is indicated on the LCD in the maintenance mode.
Step
1 Scanner unit failure
2 Main PCB failure
Error code BB
SCANNER ERROR
White level data error
* This error is indicated on the LCD in the maintenance mode.
Step
1 Scanner unit failure
2 Main PCB failure
Error code BD
SCANNER ERROR
Black level data error
* This error is indicated on the LCD in the maintenance mode.
Step
1 Scanner unit failure
2 Main PCB failure
Error code BE
SCANNER ERROR
Detection error of scanning starting edge
* This error is indicated on the LCD in the maintenance mode.
Step
1 Scanner unit failure
2 Main PCB failure
Cause
Replace the FB unit.
Replace the main PCB ASSY.
Cause
Replace the FB unit.
Replace the main PCB ASSY.
Cause
Replace the FB unit.
Replace the main PCB ASSY.
Cause
Replace the FB unit.
Replace the main PCB ASSY.
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Remedy
Remedy
Remedy
Remedy
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