Brother DCP-8110DN Service Manual page 140

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<User Check>
- Check that the document is not reversed.
- Check that the document is set in the ADF correctly.
Step
1 Incorrect white level correction data Execute function code 55.
First side CIS unit or second side
2
CIS unit failure
3 Main PCB failure
Vertical streaks
Step
First side CIS unit or second side
1
CIS unit failure
Vertical streaks
<User Check>
- Clean the document glass or the ADF glass.
- Clean the first side document hold or second side document hold.
Step
First side CIS unit or second side
1
CIS unit failure
Cause
Replace the first side CIS unit or second
side CIS unit.
Replace the main PCB ASSY.
<User Check>
- Clean the document glass or the ADF glass.
- Clean the first side document hold or second side
document hold.
Cause
Replace the first side CIS unit or second
side CIS unit.
Cause
Replace the first side CIS unit or second
side CIS unit.
2-95
Remedy
Remedy
Remedy
Confidential