When you replace the drum unit with a new one, you must reset the drum counter by completing the following steps:

NOTE: Illustrations shown below are from a representative product and may differ from your Brother machine.

1. Make sure the machine is turned on.
2. Make sure the machine's cover is closed.
3. Press and hold (Toner) for about five seconds.
4. Press Drum.
5. Select the toner color for the drum unit you just replaced.
6. Press Yes.