Brother DCP-J552DW Service Manual page 113

■ Completely blank
Step
1 White level correction data failure Carry out maintenance 55.
2 CIS flat cable connection failure
3 Damaged CIS flat cable
4 CIS unit defective
5 Main PCB defective
■ Vertical streaks
Step
1 Foreign materials are attached to
the glass surface inside the
scanner unit
2 Foreign materials are attached to
the CIS unit lens surface
3 CIS unit defective
<User Check>
- Check if documents are not reversed.
- Make sure that the document is loaded in the ADF document
support.
Cause
(Refer to
Reconnect the CIS flat cable.
Replace the CIS flat cable.
Replace the CIS unit.
Replace the main PCB ASSY.
<User Check>
- Clean the document cover glass or ADF glass.
- Clean the document pressure bar.
Cause
Remove foreign materials.
Remove foreign materials.
Replace the CIS unit.
2-80
Solution
Chapter 5, Section 1.3.17)
Solution
Confidential