Brother HL Series User Manual page 97

Routine Maintenance
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.
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