Brother MFC 9970CDW - Manual (Page 76)

70
i
Push the drum unit in until it stops.
j
Close the front cover of the machine.
Cleaning the drum unit
A
If your printout has colored 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 the steps below to solve the problem.
a
Make sure that the machine is in the
Ready mode.
b
Press MENU.
c
Press a or b to display
Print Reports
.
Press Print Reports.
d
Press a or b to display
Drum Dot Print
.
Press Drum Dot Print.
e
The machine will display Press Start.
Press Black Start or Color Start.
f
Turn off the machine’s power switch.
Unplug the telephone line cord first,
disconnect all cables, and then unplug
the power cord from the AC power
outlet.