What re the instructions to perform a Brother Series Printer Drum Reset ?
If the indicator light(s) on printer turns on while printing, you may have to reset your printer.
First, confirm that there is no paper jam, and that the toner cartridge is still functioning properly.
Open the front cover of the printer.
Press and hold “GO” button down until all indicator lamps are lit.
Release “GO” Button, and then close the front cover.
The machine should work properly.