Brother DCP-7057 Service Manual page 98

■ 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.
Error code B8
Scanner Error
A/D converter standard voltage failure; at Low side.
* This error is indicated on the LCD in the maintenance mode.
Step
1 CIS unit failure
2 Main PCB failure
■ Error code B9
Scanner Error
Scanning light adjustment error.
* This error is indicated on the LCD in the maintenance mode.
Step
1 CIS unit failure
2 Main PCB failure
■ Error code BA
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.
---
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 BB
Scanner Error
White level data error.
* This error is indicated on the LCD in the maintenance mode.
Step
White level data failure
1
2 CIS unit failure
3 Main PCB failure
B7
Cause
Cause
Cause
Cause
2-61
Remedy
Replace the CIS unit.
Replace the main PCB ASSY.
Remedy
Replace the CIS unit.
Replace the main PCB ASSY.
Remedy
Replace the main PCB ASSY.
Remedy
Execute the "Acquisition of white level data
(Function code 55)".
Replace the CIS unit.
Replace the main PCB ASSY.
Confidential