Brother MFC-J6520DW - Page 114

Confidential
2-80

Completely blank
 Straight vertical stripes
User Check
- Check that documents are not reversed.
- Check that they are set in the ADF tray securely.
Step Cause Solution
1 White level correction data
failure
Carry out maintenance 55.
2 First side or second side CIS
flat cable connection failure
Reconnect the first side or second side CIS flat
cable.
3 The first side or second side
CIS flat cable defective
Replace the first side or second side CIS flat
cable.
4 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.
5 Main PCB defective Replace the main PCB ASSY.
User Check
- Clean document cover glass or ADF glass.
- Clean the document pressure bar.
Step Cause Solution
1 Foreign materials on the lens
surface of CIS unit
Remove foreign materials.
2 First side or second side CIS
unit defective
Replace the first side or second side CIS unit.