To reset the drum light on your Sharp AL2020 copier press the following key's in sequence and as
quickly as possible (with 4 seconds for the first 4 keys)
Press "C" then the "auto" key (exposure mode) then the "C" key then the "auto" key again.
So in other words C, Auto, C, Auto
If done correctly the display should go blank.
Then key in 24 as if you were going to make 24 copies.
Now press the "print" button
Now key in 7 as if you were making 7 copies
Now press the print button again.
You should now be getting flashing zero's on the display.
Turn the machine off then on again and your drum light should be gone!
You can usually reset this counter at least once to get twice the life out of your drum unit.
Good Luck and Thank You for using Fixya.
WheatlandServices