Xerox WorkCentre PE120-120i-3124 - Manual (Page 174)

Maintenance 8.8
Replacing the Toner Cartridge
When the display on the control panel shows the warning
message, “[Toner Empty],” the machine stops printing. At this
stage, the toner cartridge needs to be replaced.
1 Open the front door.
2 Lightly pushing the used cartridge down, pull it out.
3 Unpack the new toner cartridge and gently shake it
horizontally 5 or 6 times to distribute the toner evenly
inside the cartridge.
Save the box and the plastic bag for shipping.