У вашего броузера проблема в совместимости с HTML5
Replacement of the Photo Conductor Drum, Blade and Developer
1. Select Tech. Rep. Mode → [Counter] → [Special Parts Counter] → [PC Life].
2. Press the Clear key to clear the counter value.
3. Turn OFF the main power switch.
NOTE
• Clear the PC Life counter before removing the IU.
• After clearing the PC Life counter, be sure to turn OFF the main power switch.
• The Developer has to be replaced together with the Photo Conductor Unit