EC-2033 LCD Math Tutor Calculator (650-0528) Care and Maintenance Faxback Doc. # 18164 Your Radio Shack EC-2033 LCD Math Tutor Calculator is an example of superior design and craftsmanship. The following suggestions will help you care for your EC-2033 so you can enjoy it for years. Keep the EC-2033 dry. If it gets wet, wipe it dry immediately. Liquids might contain minerals that can corrode the electronic circuits. Handle the EC-2033 gently and carefully. Dropping it can damage circuit boards and cases and cause the EC-2033 to work improperly. Use and store the EC-2033 only in normal temperature environments. Temperature extremes can shorten the life of electronic devices and distort or melt plastic parts. Keep the EC-2033 away from dust and dirt, which can cause premature wear of parts. Wipe the EC-2033 with a damp cloth occasionally to keep it looking new. Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the EC-2033. Modifying or tampering with the EC-2033's internal components can cause a malfunction and might invalidate your EC-2033's warranty. If your EC-2033 is not performing as it should, take it to your local Radio Shack store for assistance. (LB 10/24/95)