Brother DCP-9020CDW Basic User's Manual page 67

h
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). The arrow on the tab must
be aligned with the arrow on the drum unit.
If it is not, printed pages may have a
vertical stripe.
i
Repeat step c and step h to clean
each of three remaining corona wires.
NOTE
When cleaning the corona wires, you do
not have to remove the toner cartridge
from the drum unit.
j
1
Routine maintenance
Slide each toner cartridge and drum unit
assembly into the machine. Make sure
you match the toner cartridge colour to
the same colour label on the machine.
BK = Black, C = Cyan,
M = Magenta, Y= Yellow
BK
A
C
M
Y
59