Dell OptiPlex GX240 User Manual download pdf (Page 15)

Setup and Quick Reference Guide 13

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.

• Before working inside the computer, unplug the system to help prevent

electric shock or system board damage. Certain system board

components continue to receive power any time the computer is

connected to AC power.

• To help avoid possible damage to the system board, wait 15 seconds

after unplugging the system before disconnecting a device from the

computer.

NOTICE: Observe when the auxiliary power light-emitting diode (LED)

indicator on the system board turns off to verify that system power is off (see

your

User’s Guide

for the location of this LED).

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Dell OptiPlex GX240 User Manual Page 15