Brother DCP-J4110DW Service Manual page 123

White vertical streaks

Step
1 White reference film of document
pressure bar of the document
scanner unit stained (in the case of
problem in the second side)
2 White reference film of document
scanner unit stained (in the case of
problem in first side)
3 White reference film stained
(first side or second side)
4 First side or second side CIS unit
defective
Colored over the whole page

Step
1 White level correction data failure Carry out maintenance 55.
2 First side or second side CIS unit
defective
3 Main PCB defective
User Check
- Clean document cover glass or ADF glass.
- Clean the document pressure bar.
Cause
Clean the white reference film of the document
scanner unit.
Clean document scanner unit glass at white
reference film.
Replace the document scanner unit.
Replace the first side or second side CIS unit.
User Check
- Clean document cover glass or ADF glass.
- Clean the document pressure bar.
Cause
Replace the first side or second side CIS unit.
Replace the main PCB ASSY.
2-86
Solution
Solution
Confidential