When the printer shows "Replace drum"or Drum end soon",please follow this video to reset your printer.
part one：For Printer with Multi-line LCD
first：When ready is displayed on the machine interface，Press the Up arrow key while holding down Go on the machine's control panel.
second：Press the up or down arrow keys to display the Drum Unit，Press OK.
third：Press the Up or Down arrow key to display the color of the drum unit that you replaced，Press OK
last：Press the Up arrow key for Reset to reset the drum counter，Reset completed when Accepted is displayed.
part two：For Printer with Touch Screen Display
second：Press All Settings,swipe up or down,or press the Upor Down arrow keyto display Machine Info,Press Machine Info.
third:Press Parts LifeTouch the dial pad area to light up the LEDs.
fourth:Press and hold # until the machine's display message changes.
last:Press the color of the drum unit you replaced,press Yes,Reset completed when Accepted is displayed.