Brother DCP-J552DW Service Manual page 219

Check pattern evaluation criteria
A: Color blocks
• Patchy color
(Note: Vertical streaks in color blocks are negligible.)
B: Contrast charts 1, 2 and 3
• Black or white vertical streaks
• Patchy color
• Missing dots
C: Resolution chart
• Black or white vertical streaks
• Missing dots
D: Whole page
• Ghosts (images appearing on blank portions of the paper)
• Color horizontal streaks
• Black vertical band
4-9
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