MPS930b User’s Guide> 105INSTALLING CONSUMABLESThe Drum Unit and Toner Cartridge should be replaced when theyhave reached the end of their print life. The Drum Unit prints about60,000 images.The Toner Cartridge prints about 30,000 images.The printer will produce a warning on the Operator Panel to informthe user when the remaining toner amount is low. When the tonercartridge is empty, there will be a notification on the Operator Paneland the printer will not continue printing until a new cartridge isinstalled.NOTE> The possible number of pages that can be printed from aToner Cartridge is based on Letter or A4 size paper. Thenumber of pages that can be actually printed variesaccording to the conditions of use.CAUTION> Be sure to switch off and unplug the machine beforeaccessing the interior of the machine for cleaning,maintenance, or fault clearance. Access to a livemachine’s interior can cause electric shock.INSTALLING THE DRUM CARTRIDGEDrum Cartridge OKI Part # 56120801When installing the Drum Cartridge, take note of the followingpoints:• Do not subject it to direct sunlight or strong light.• When installing the Drum Cartridge, select a location notsubject to strong light and try to finish the installation within5 minutes or less.• Do not touch the surface of the photosensitive drum.• A drum shutter protects the photosensitive drum from light.Do not open the drum shutter or contact any internalsurfaces with your fingers or hand.