Opening The Base Unit; Taking Antistatic Precautions - Intergraph TD-20 Setup Manual

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CAUTION If you do not use cables supplied by Intergraph, use shielded cables to prevent excessive
electromagnetic interference (EMI). Intergraph cables are designed to reduce the amount of
EMI produced by the system.

Opening the Base Unit

You must open the base unit to change internal system settings, and to change or add system
components such as expansion boards, system memory, and internal peripheral devices.
To open the base unit:
1. Turn off power to the computer.
2. Remove the cover screws securing the cover to the back panel of the base unit. Refer to
the illustrations in Chapter 1, "Setting Up the Hardware."
3. Lift the cover up and away from the chassis.
CAUTION While the base unit is open, take antistatic precautions as described in "Taking Antistatic
Precautions."

Taking Antistatic Precautions

Static electricity can damage the components inside a computer or on a printed circuit board.
To keep the possibility of electrostatic discharge to a minimum, do the following:
u
Turn off power to the computer.
u
Touch the bare metal of the base unit chassis to discharge any static electricity.
u
Wear a grounding wrist strap when working in a computer or handling a printed circuit
board. Make sure the strap is properly connected to the sysetm and to your wrist.
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Do not wear wool or polyester clothing.
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Do not work on surfaces known to have high electrostatic buildup, such as rugs and
carpets. Work on a static-safe surface instead.
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Work in an area with a relative humidity of at least 50 percent.
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Handle expansion boards and other printed circuit boards as little as possible and by the
edges only.
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Leave new parts in their protective packaging until you install them.
u
To maintain grounding, do not unplug the power cord from the base unit and AC outlet.