Power the machine OFF from the main switch leaving the sub switch ON.
Turn main power switch ON while pressing the Utility/Counter key. Keep holding it till the comes up in Service mode.
04 - Counter / Data
03 - Parts Counter
01 - Special Parts
03 - Charging Corona / Drum
Move arrow down to highlight the item
Select the "Counter Clear" button to reset the count
Select "Return Button"
Exit out of service