Reset drum counter on Sharp AL-1644

This works on MOST sharp AL series copiers.
Press these keys in sequence:
Clear → Density select → Clear→ Density select
display should go blank. Then enter:
24 as if you were making 24 copies then press print
then enter 7 as if you were making 7 copies then press print
if successful you should see flashing 000
turn machine off then on again and the drum light should be gone.
Good Luck