Brother HL-L3230CDW Online User's Manual page 293

NOTE
DO NOT clean the surface of the photosensitive drum with a sharp object or any liquids.
13. Reinsert the toner cartridge firmly into the 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.
14. Slide the toner cartridge and drum unit assemblies into the machine. Make sure that you match the toner
cartridge colour to the same colour label on the machine.
15. Close the machine's top cover.
16. Press to turn the machine on.
HL-L3270CDW
1. Make sure the machine is in Ready Mode.
2. Press [Settings] > [All Settings] > [Print Reports] > [Drum Dot Print].
3. Press [Yes].
The machine prints the Drum Dot Check Sheet.
4. Press and hold to turn the machine off.
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