Brother HL 2270DW - Manual (Page 97)

Routine Maintenance
93
4
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 into the drum unit until you hear it lock into place. If you put the cartridge in
properly, the green lock lever will lift automatically.