FOR DCP AND MFC PRINTERS:
Swap your toner cartridge into the new drum, install the new drum and toner into the printer, and leave the front door open
With the front cover open pess the [Clear] button.
The LCD screen will show
Press [1] to reset the drum counter
The LCD screen will show
"Accepted"
You may now close the printer door and your drum counter is set to 100%
FOR HL PRINTERS:
Swap your toner cartridge into the new drum, install the new drum and toner into the printer, and leave the front door open
Press the green [Go] button until all the lights light up then release the button.
Close the door and your drum life counter is reset to 100%.