Review and follow these precautions to prevent damage to the unit, to protect
data, and to avoid personal injury.
- Put on your electrostatic discharge (ESD) wrist or shoe strap to
avoid damaging any circuitry.
- Place an ESD mat on a suitably grounded surface, and then place the unit
on the mat.
- Remove any devices, such as diskettes, tape cartridges, or CD-ROMs, from the
unit being serviced.
- Power off the unit and any peripheral devices that are
connected to it.
Note: Replacing a hot plug device does not require
powering down the system.
- Disconnect the power cord from the electrical outlet and
then from the unit. When a unit is plugged into an AC power source,
there is always voltage applied to the unit. You must disconnect the power
cord from the power source before opening the unit.
- Disconnect all peripheral device cables from the unit.
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Static electricity can damage electrical components. Before removing or
replacing a component, observe the following precautions to prevent damage to
electric components and accessories:
- To avoid hand contact, transport and store all electrostatic parts and
assemblies in conductive or approved ESD packaging, such as ESD tubes, bags, or boxes.
- Keep electrostatic-sensitive parts in their containers
until they arrive at static-free stations.
- Remove all ESD generating materials from your work area.
- Place items on a grounded surface before removing them from
- Do not take the new component out of its ESD package or handle any
component before connecting your ESD wrist or shoe strap to a suitably
- Always use an ESD protected work station when servicing the unit. If an
ESD work station is not available, ground yourself to discharge body static
by touching the metal chassis of the unit you are servicing.
- Avoid contact with pins, leads, or circuitry.
- Use the ESD package provided with the new part to return the old part.
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Ensure that you take the following precautions before you disassemble a
- Label each cable as you remove it,
noting its position and routing. This will make the replacement of the cables
much easier, and will ensure that the cables are rerouted properly to protect
- Keep all screws with the units removed. The screws used in the unit are of different thread sizes and lengths.
Using the wrong screw
in a component could damage the unit.
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