Dell OptiPlex GX240: When Using Your Computer System

When Using Your Computer System

As you use your computer system, observe the following safety guidelines.

CAUTION: Do not operate your computer system with any cover(s)

(including computer covers, bezels, filler brackets, and front-

panel inserts) removed.

• To help avoid damaging your computer, be sure the voltage selection

switch on the power supply is set to match the AC power available at

your location:

– 115 volts (V)/60 hertz (Hz) in most of North and South America

and some Far Eastern countries such as South Korea and Taiwan

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– 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan

NOTE: The voltage selection switch must be set to the 115V position

even though the AC supply in Japan is 100 V.

– 230 V/50 Hz in most of Europe, the Middle East, and the Far East

Also be sure your monitor and attached peripherals are electrically

rated to operate with the AC power available in your location.

NOTE: Auto-select power supplies do not require a voltage selection

switch. Your power supply may not have this switch.

• To help prevent electric shock, plug the computer and peripheral

power cables into properly grounded power sources. These cables are

equipped with three-prong plugs to help ensure proper grounding. Do

not use adapter plugs or remove the grounding prong from a cable. If

you must use an extension cable, use a three-wire cable with properly

grounded plugs.

12 Setup and Quick Reference Guide