Brother DCP-9055CDN - Manual (Page 76)

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e
Clean the corona wire inside the drum
unit by gently sliding the green tab from
left to right and right to left several times.
Note
Be sure to return the tab to the home
position (a) (1). If you do not, printed
pages may have a vertical stripe.
f
Close the corona wire cover.
g
Repeat steps d to f to clean each of
three remaining corona wires.
1