Brother DCP-J752DW

2-81
Confidential
■ White vertical streaks
■ Shades in the entire image
■ Entire image is distorted
<User Check>
- Clean the document cover glass or ADF glass.
Step Cause Solution
1 CIS unit defective Replace the CIS unit.
2 White reference film stained Clean the white reference film of the document
scanner unit.
3 Scratched or damaged white
reference film
Replace the document scanner unit.
<User Check>
- Clean the document cover glass or ADF glass.
- Clean the document pressure bar.
Step Cause Solution
1 White level correction data failure Carry out maintenance 55.
(Refer to Chapter 5, Section 1.3.17)
2 CIS unit defective Replace the CIS unit.
3 Main PCB defective Replace the main PCB ASSY.
Step Cause Solution
1 CIS type mismatches Carry out maintenance 59.
(Refer to Chapter 5, Section 1.3.20)