AL-1631 Repalced drum, but light is still on

If you will replaced the drum you should reset the drum counter .
To reset follow these steps:
Step1: Press continuously Clear key then press Exposure key then Clear key then Exposure key
Step2: You are inside the simulation if the display turns off but if not do again step1
Step 3: Press 24 then press print button then press 7 then press print button
If not canceled try step4
Step4: Do step1 to step2 then Press 24 then press print button then press 6 then press print button