Brother 09055CDN Service Manual page 122

■ Error code B1
Scanner Error
Dark level offset data level error for scanning.
* This error is indicated on the LCD in the maintenance mode.
Error code B2
Scanner Error
Gain control data level error for scanning.
* This error is indicated on the LCD in the maintenance mode.
Error code B3
Scanner Error
The scanning area setting left edge detection error. (white tape)
* This error is indicated on the LCD in the maintenance mode.
Error code B4
Scanner Error
The scanning area setting right edge detection error. (white tape)
* This error is indicated on the LCD in the maintenance mode.
Step
1 Second side scanning CIS failure
2 Document scanner unit failure
3 Main PCB failure
■ Error code B5
Scanner Error
The scanning area setting reduction detection error. (white tape)
* This error is indicated on the LCD in the maintenance mode.
Error code B6
Scanner Error
The scanning area setting enlargement detection error. (white tape)
* This error is indicated on the LCD 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
Cause
Cause
2-83
Remedy
Replace the second side scanning CIS.
Replace the document scanner unit.
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
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