User manual SHARP EL-6660

[. . . ] These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures: -- Reorient or relocate the receiving antenna. [. . . ] Because of this, the projector power should be turned off when not displaying an image. (The darkened display will return to normal once it cools down after moving the OHP projection panel away from the projector. ) (2) When using the OHP projection panel for prolonged periods of time, its display may darken due to high temperatures. In this case, turn the contrast knob to the counterclockwise in order to make it lighter. (3) Be careful when handling the OHP projection panel. Its surface temperature will become high during use. (4) Use this product at room temperatures between 0°C and 30°C (32°F to 86°F). Using the hard cover The hard cover protects the OHP panel controller from shock. Place the hard cover on the OHP panel controller when not using the OHP panel controller or when carrying it in its carrying case. About the power supply The OHP panel controller included with this product requires two kinds of batteries, one for its operation and the other for its memory backup. Please install all four included batteries before the first usage. ⷠIf the product is not to be used for some time, to avoid damage to the unit from leaking batteries, remove them and store in a safe place. ⷠDo not leave exhausted batteries inside the product. ⷠDo not fit partially used batteries, and be sure not to mix different batteries types. ⷠKeep batteries out of the reach of children. Remove used batteries from the compartment. Otherwise, the calculator may be damaged from electrolyte leakage. ⷠDo not throw batteries into a fire as this may result in an explosion. ⷠThe original batteries were installed at the factory at the time of shipment and may be depleted before satisfying the full operating time indicated in the specifications. Please check that all the following accessories are included upon purchase. CAUTION: The cable connector of the OHP projection panel should only be connected to or disconnected from the OHP panel controller after turning off the power. Doing so while the power is on can cause the loss of function of all the keys of the OHP panel controller. [. . . ] By using this AC adaptor, the operating battery consumption of the OHP panel controller can be reduced. ⷠConnect the AC adaptor after turning off the power of the OHP panel controller. If the following precautions are not observed, fire or electric shock may occur. Do not use the AC adapter for other equipment. [. . . ]