Brother HL-L3230CDW Online User's Manual page 289

Home > Routine Maintenance
Clean the Drum Unit
If your printout has black or white dots or other repeating marks at 94 mm intervals, the drum may have foreign
material, such as glue from a label, stuck on the drum surface.
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1. Make sure the machine is in Ready Mode.
2. Press a or b to display the [Print Reports] option, and then press OK.
3. Press a or b to select the [Drum Dot Print] option, and then press OK.
4. Press Go.
The machine prints the Drum Dot Check Sheet.
5. Press and hold
6. Open the top cover until it locks in the open position.
WARNING
HOT SURFACE
The machine's internal parts will be extremely hot. Wait for the machine to cool down before touching
them.
> Clean the Machine
to turn the machine off.
> Clean the Drum Unit
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