428 Maintenance
4 Place the removed waste toner box on a level surface.
IMPORTANT:
• Never lay the waste toner box on its side as this may cause its malfunction or toner spills.
5 Slightly pressing down the tab on the drum cartridge that you want to replace, pull it out halfway with one hand.
6 Support the drum cartridge with the other hand from underneath, and then pull it out completely.
7 Repeat the steps 5 and 6 to remove the other three cartridges.