Oki Data CONFIDENTIAL45487001TH Rev.1 4-35 /4. Maintenance menus4.3.4 Functions of buttons when/after power-onAfter the printer is turned on, buttons on the operator panel of B721/B731/ES7131/MPS5501b function are described below.(1) BACK, ENTER and ONLINE buttons for 5 secondsStart the System Maintenance menu.(2) BACK, ENTER and CANCEL buttons for 5 secondsStart the Factory Maintenance menu.When the printer is turning on, buttons on the operator panel of B721/B731/ES7131/MPS5501b function are described below.(3) BACK, MENU and ENTER buttonsIgnoring all warnings and errors, start the printer, always placing it to an onlinemode.(4) ENTER buttonStart the Boot menu.
