Brother DCP-7055 Service Manual page 97

■ Error code B1
Scanner Error B1
Dark level offset data level error for scanning.
* This error is indicated on the LCD in the maintenance mode.
Error code B2
Scanner Error B2
Dark level offset data level error for scanning.
* This error is indicated on the LCD in the maintenance mode.
Error code B3
Scanner Error B3
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 B4
The scanning area setting right edge detection error. (white tape)
* This error is indicated on the LCD in the maintenance mode.
Step
1 Document scanner unit failure
2 Main PCB failure
■ Error code B5, B6
These errors do 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.
---
Error, which cannot be specified, occurs.
<User Check>
• Turn OFF the power switch, and turn it ON again after a while.
Step
1 Main PCB failure
■ Error code B7
Scanner Error
A/D converter standard voltage failure; at High side.
* This error is indicated on the LCD in the maintenance mode.
Cause
Cause
B7
2-60
Remedy
Replace the document scanner unit.
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
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