30 OKIFAX 5250|Inside the Unit1 Image Drum CartridgeThe image drum cartridge contains the greenphotosensitive drum that receives images from the LEDprint head and transfers them to the printing paper.2 Toner CartridgeThis black cylinder, installed inside the image drumcartridge, contains the black powder that forms the imageon the paper. You need to install a new toner cartridgewhen the REPLACE TONER CART message appears on thedisplay.3 LED PrintheadThis black bar writes received or copied images onto theimage drum. You should clean this bar each time youchange the toner cartridge.Locating the Serial NumberThe serial number of your fax machine is on a label on theside or back of your fax machine.The label will say “S/N”.An example serial number is: 401A0154693.
