Brother HL-4050CDN Reset Drum

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

1. Turn the printer power switch back on.
2. Press the + or - button to choose "Machine Info".
3. Press OK to proceed to the next menu level, and then press the + or - button to choose "Reset Parts Life".
4. Press OK, and then press the + button to choose "Belt Unit".
5. Press OK two times.

Drum Reset Completed.