Brother MFC Series - Page 105

2-73
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 1.4.15)
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 1.4.18)