Chapter 1 Preparation — Precautions for useENGLISH - 15Precautions for useCautions when transportingf When transporting the projector, hold it securely by its bottom and avoid excessive vibration and impacts. They may damagethe internal components and result in malfunctions.f Do not transport the projector with the adjustable feet extended. Doing so may damage the adjustable feet.Cautions when installingrDo not set up the projector outdoors.The projector is designed for indoor use only.rDo not set up the projector in the following locations.f Places where vibration and impacts occur such as in a car or vehicle: Doing so may cause damage to internal componentsor malfunction.f Near the exhaust of an air conditioner: Depending on the conditions of use, the screen may fluctuate in rare cases dueto the hot air from the air exhaust port or the heated or cooled air. Make sure that the exhaust from the projector or otherequipment, or the air from the air conditioner does not blow toward the front of the projector.f Near lights (studio lamps, etc.) and other locations with severe temperature fluctuations (when using at a place lower than1 400 m (4 593') above sea level: operating temperature of 0 °C (32 °F) to 45 °C (113 °F), when using at a place of 1 400 m(4 593') to 2 700 m (8 858') above sea level: operating temperature of 0 °C (32 °F) to 40 °C (104 °F)): The outer case maybe deformed by heat, which may result in malfunctions.f Near high-voltage power lines or near motors: Doing so may interfere with the operation of the projector.f Place where there is high-power laser equipment: Directing a laser beam onto the lens surface causes damage to the DLPchips.rBe sure to ask a specialized technician or your dealer when installing the projector toa ceiling.The optional ceiling mount bracket is required.Model No.: ET-PKR100H (for high ceilings), ET-PKR100S (for low ceilings), ET-PKR100P (for portrait)rAsk a qualified technician or your dealer to install the cable wiring for DIGITAL LINKconnection.Image and sound may be disrupted if cable transmission characteristics cannot be obtained due to inadequate installation.rThe projector may not work properly due to strong radio wave from the broadcaststation or the radio.If there is any facility or equipment, which outputs strong radio wave, near the installation location, install the projector at alocation sufficiently far from the source of the radio wave. Or, wrap the LAN cable connected to the terminal by using a piece of metal foil or a metal pipe, of which is grounded at both ends.rLens focusThe 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. Wait at least 30 minutes with the image projected before adjusting the lens focus.rDo not install the projector at high altitudes of 2 700 m (8 858') or higher above sealevel.Doing so may shorten the life of the components and result in malfunctions.rWhen installing and using the projector at an angle that exceeds 30° vertically, set[COOLING CONDITION] (x page 77).Failure to observe this may shorten the life of the components or result in malfunctions.