Chapter 1 Preparation — Precautions for useENGLISH - 15f Panasonic Corporation or its affiliate companies will never ask for your password directly. Do not divulge your password incase you receive such inquiries.f The connecting network must be secured by a firewall, etc.f Set a password for the web control and restrict the users who can log in.DIGITAL LINK“DIGITAL LINK” is a technology that uses a twisted-pair-cable to transmit video, audio, Ethernet, and serial control signals.The projector supports the optional digital interface box (Model No.: ET-YFB100G), and the “XTP transmitter” of ExtronElectronics. For twisted-pair-cable transmitter of other manufacturers of which the operation has been verified with theDIGITAL LINK compatible projector, refer to Panasonic website (http://panasonic.net/avc/projector/). Note that the verificationfor devices of other manufacturers has been made for the items set by Panasonic Corporation, and not all the operations havebeen verified. For operation or performance problems caused by the devices of other manufacturers, contact the respectivemanufacturers.DisposalTo dispose of the product, ask your local authorities or dealer for correct methods of disposal.Cautions on user To get a good picture qualityf In order to view a beautiful image in higher contrast, prepare an appropriate environment. Draw curtains or blinds overwindows and turn off any lights near the screen to prevent outside light or light from indoor lamps from shining onto thescreen.f The high clarity projection lens is thermally affected by the light from the light source, making the focus unstable in the periodjust after switching on the power. The focus stabilizes when an image is projected continuously for 30 minutes or more.r Do not touch the surface of the projection lens with your bare hands.If the surface of the projection lens becomes dirty from fingerprints or anything else, this will be magnified and projected ontothe screen.r DLP chipsf The DLP chips are precision-made. Note that in rare cases, pixels of high precision could be missing or always lit. Note thatsuch phenomena does not indicate malfunction.f Directing a high-power laser beam onto the lens surface can damage the DLP chips.r Light sourceThe light source of the projector uses LED and lasers, and has the following characteristics.f The luminance of the light source will decrease by duration of usage.The usage time until when the luminance of the light source decreases by half is approximately 20 000 hours. 20 000 hoursis the estimated duration, and it varies depending on individual differences and usage conditions.If the light source goes off or the brightness reduces noticeably, ask your dealer about replacement of the light source unit.r Computer and external device connectionsf When connecting a computer or an external device, use power cords and shielded cables following instructions in thismanual.f Use a commercial DVI-D cable with a ferrite core.