Un load the drum unit, check the drum/s gear, is it wear off, if so change it along with the drum's drive gear at machine base, check also the gears of developing unit
I installed a new drum in my Sharp AL-1540CS. I remember from past installations, I needed a code....
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I installed a new drum in my Sharp AL-1540CS. I remember from past installations, I needed a code. For it to work again. I called the vendor. But it's Saturday and the vendor is closed