Brother MFC-L8600CDW - Improving the print quality

2-130
Confidential
■ White vertical streaks
< User Check >
- Clean the first side CIS glass or document glass.
- Clean the second side CIS glass.
Step Cause Remedy
1 Foreign object inside the
document scanner unit
Remove the foreign object.
2 Foreign object inside the
second side CIS glass
Remove the foreign object.
3 Dirt on each roller of the ADF Clean each roller of the ADF.
4 Dirt on the ADF paper feed
section
Clean the ADF paper feed section.
5 Dirt inside the second side
CIS glass
Clean inside the second side CIS glass.
6 Dirt inside the document
scanner unit
Clean inside the document scanner unit.
7 First side or second side CIS
unit failure
Replace the first side or second side CIS
unit.
8 Scratch on second side CIS
glass
Replace the ADF unit.
9 Scratch on document glass or
first side CIS glass
Replace the document scanner unit.