When the machine is turned on, the power switch LED lamp is lit.NoteDo not push the machine with the ADF or scanner unit open.Do not apply force from above to the cassettes when they are pulled out.Do not push the machine from the back with the cassettes pulled out.Setting the Printer DriverIf the additional tray unit(s) are installed, set the tray(s) to a printer driver.NoteTo follow this procedure, you must log in to a computer as the administrator.If your Mac OS applies to the following conditions, the information about the installed optionis automatically obtained, not requiring you to set the printer driver.If the USB connection or the network connection with Bonjour is used and you install theoption to the machine before installing the driverThe Windows XPS printer driver is not available with Windows Server 2003.You must register the printer driver in the computer in advance.Installing a Driver and Software to a ComputerSetting Additional Tray(s) to the Windows PCL PrinterDriver1. Click [Start], and then select [Devices and Printers].2. Right-click [OKI MC873], and then select [OKI MC873(PCL6)] from[Printer properties].51