Brother MFC-9330CDW - Manual (Page 78)

70
Cleaning the drum unit
A
If your printout has black or white dots or
other repeating marks at 3.7 in. (94 mm)
intervals, the drum may have foreign
material, such as glue from a label stuck on
the drum surface. Follow these steps to solve
the problem.
a
Make sure the machine is in the Ready
mode.
b
Press .
c
Press All Settings .
d
Swipe up or down, or press a or b to
display
Print Reports .
e
Press Print Reports .
f
Swipe up or down, or press a or b to
display
Drum Dot Print .
g
Press Drum Dot Print .
h
The Touchsceen will show
Press [OK] .
Press OK .
i
The machine will print the Drum Dot
Check Sheet. Then press .
j
Press and hold down to turn off the
machine.
k
Open the top cover until it locks in the
open position.
l
The color of printed dots is the color of
the drum you should clean. Remove the
toner cartridge and drum unit assembly
of the color causing the problem.