Brother DCP-J552DW Service Manual page 309

Assurance Mode Switch 06 (Printing Assurance 4)
Selector
No.
Improvement of white and black
1
horizontal streaks on bottom edge
2 of the paper during normal and
high-speed printing on plain paper
Improvement of white and black
3
streaks at the center from the top of
4 the paper during normal and high-
speed printing on plain paper
Improvement of white and black
5
streaks during glossy paper
6
printing
7
Not used
8
Selectors 1 and 2: Improvement of white and black horizontal streaks on bottom

Setting these selectors enables improvement of the white and black horizontal steaks on the
bottom edge of paper during normal and high-speed printing on plain paper.
Selectors 3 and 4: Improvement of white and black streaks at the center from the

Setting these selectors enables improvement of the white and black steaks that appear from the
top to the center of paper during normal and high-speed printing.
Selectors 5 and 6: Improvement of white and black streaks during glossy paper

Setting these selectors enables improvement of the white and black vertical steaks on paper
during glossy paper printing.
Function
edge of the paper during normal and high-speed printing on
plain paper
top of the paper during normal and high-speed printing on
plain paper
printing
5-77
Setting and Specifications
No. 1 2
0 0 : Disable (default)
0 1 : Improve black streaks
1 0 : Improve white streaks
1 1 : Improve black streaks more
No. 3 4
0 0 : Disable (default)
0 1 : Improve black streaks
1 0 : Improve white streaks
1 1 : Improve black streaks more
No. 5 6
0 0 : Disable (default)
0 1 : Improve black streaks
1 0 : Improve white streaks
1 1 : Improve black streaks more
Confidential