(4)MakesuretheDrumLEDisnowoff.(1)Makesurethatthefrontcoverisopen. (2)PressandholdOKforabouttwosecondstodisplay DrumUnit,andthenpressOK. (3)PressatodisplayResetandresetthedrumcounter. (4)Closethefrontcover.(1)Makesurethatthefrontcoverisopen. (2)PressandholdOKforabouttwosecondstodisplay ReplaceDrum...