Brother MFC-9120CN - Manual (Page 178)

162
f
Turn the drum unit gear by hand while
looking at the surface of the OPC
drum (1).
g
When you have found the mark on the
drum that matches the print sample,
wipe the surface of the OPC drum with a
dry cotton swab until the dust or glue on
the surface comes off.
IMPORTANT
DO NOT clean the surface of the
photosensitive drum with a sharp object.
h
Put the toner cartridge back firmly into
the drum unit until you hear it lock into
place.
Note
Make sure that you put in the toner
cartridge properly or it may separate from
the drum unit.
1
h