14 OKIOFFICE 87 Setup GuideComponents 2LINE TerminalTerminal for connecting theunit to an outside telephoneline.TEL TerminalTerminal for connecting theMFP machine to an externaltelephone.Power SwitchAC Power InletPlug the AC power cord, supplied withyour MFP machine, into this inlet.PC ConnectorPlug the computer cableinto this connector.LED Print HeadThis black bar is the part ofyour MFP machine whichwrites received or copiedimages onto the image drumunit. You should clean this bareach time you change yourtoner cartridge.Toner CartridgeThis black cylinder,installed inside the imagedrum unit, contains theblack powder which isyour MFP machine’s ink.You need to install a newtoner cartridge when theREPLACE TONER CARTmessage appears on thedisplay.Image Drum UnitThe image drum unit contains thegreen photosensitive drum whichreceives images from the LEDprint head and transfers them tothe printing paper.