Brother DCP-7080 Service Manual page 128

 Partially shaded
Step
Dirt inside of scanner glass
1
Deformed document sponge
2
 Fully tinged
Step
Incorrect white level correction data Execute "Acquire white level data
1
First or second side CIS unit failure Replace the first or second side CIS unit.
2
Main PCB failure
3
<User Check>
- Clean the scanner glass.
Cause
<User Check>
- Clean the scanner glass or ADF glass.
Cause
2-93
Remedy
Clean the inside of scanner glass.
Replace the document scanner unit.
Remedy
code: 55)".
Replace the main PCB ASSY.
(function
Confidential