Brother MFC-8220 Service Manual page 223

I-17 Black band
Possible cause Step
Corona wire 1
failure
Dirt on the 2
corona wire.
Check
Is the wire cleaner at its home
position?
Is the corona wire dirty?
6-45
Result Remedy
No Return the wire cleaner
to its home position.
Yes 1) Clean the corona
wire.
2) If the problem still
appears after
cleaning, replace
the drum unit.
MFC-8220
SERVICE MANUAL
Ground
contacts
(2)
(2)