Brother MFC-7450

1-20
Confidential
■ Error code AF
FB unit home position failure
■ Error code B0
Harness for scanning is not connected correctly.
* This error is indicated on the LCD in the maintenance mode.
■ Error code B7
Detection error of scanner (Scanning reference voltage adjustment malfunction.)
* This error is indicated on the LCD in the maintenance mode.
■ Error code B9
Scanning light adjustment error is detected.
* This error is indicated on the LCD in the maintenance mode.
Scan Unable AF
Remove the original document. Turn the power off, then on again.
Step Cause Remedy
1 FB unit failure Replace the FB unit.
2 Main PCB failure Replace the main PCB ASSY.
Scanner Error
Step Cause Remedy
1
Scanner harness not connected
correctly.
Reconnect the scanner harness correctly.
2 Scanner harness broken Replace the FB unit.
3 Main PCB failure Replace the main PCB ASSY.
Scanner Error
Step Cause Remedy
1 FB unit failure Replace the FB unit.
2 Main PCB failure Replace the main PCB ASSY.
Scanner Error
Step Cause Remedy
1 FB unit failure Replace the FB unit.
2 Main PCB failure Replace the main PCB ASSY.