Brother HL-L3230CDW Online User's Manual page 270

5. Unpack the new drum unit.
6. Remove the protective cover.
7. Reinsert the toner cartridge firmly into the new drum unit until you hear it lock into place.
Make sure you put the toner cartridge in correctly or it may separate from the drum unit.
8. Clean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to left
several times. Repeat this for all the corona wires.
Be sure to return the green tab to the Home position (a). 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.
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