user manual

4–2 Maintenance and Service Guide
Removal and replacement procedures
Drive handling
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CAUTION: Drives are fragile components that must be handled with care. To prevent damage to the computer, damage to a
drive, or loss of information, observe these precautions:
■ Before removing or inserting a solid-state module or optical drive, shut down the computer.
■ Before handling a solid-state module or optical drive, be sure that you are discharged of static electricity. While
handling a solid-state module or optical drive, avoid touching the connector.
■ Before removing an optical drive, be sure that a disc is not in the drive, and be sure that the optical drive tray
is closed.
■ Handle solid-state modules or optical drives on surfaces covered with at least one inch of shock-proof foam.
■ Avoid dropping solid-state modules or optical drives from any height onto any surface.
■ After removing a solid-state module or optical drive, place it in a static-proof bag.
■ Avoid exposing a solid-state module to products that have magnetic fields, such as monitors or speakers.
■ Avoid exposing a solid-state module or optical drive to temperature extremes or liquids.
■ If a solid-state module or optical drive must be mailed, place the solid-state module or optical drive in a bubble
pack mailer or other suitable form of protective packaging and label the package “FRAGILE.”
Grounding guidelines
Electrostatic discharge damage
Electronic components are sensitive to electrostatic discharge (ESD). Circuitry design and structure determine the
degree of sensitivity. Networks built into many integrated circuits provide some protection, but in many cases, ESD
contains enough power to alter device parameters or melt silicon junctions.
A discharge of static electricity from a finger or other conductor can destroy static-sensitive devices or
microcircuitry. Even if the spark is neither felt nor heard, damage may have occurred.
An electronic device exposed to ESD may not be affected at all and may work perfectly throughout a normal cycle.
Or, the device may function normally for a while, and then degrade in the internal layers, reducing its life
expectancy.
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CAUTION: To prevent damage to the computer when you are removing or installing internal components, observe
these precautions:
■ Keep components in their electrostatic-safe containers until you are ready to install them.
■ Use nonmagnetic tools.
■ Before touching an electronic component, discharge static electricity by using the guidelines described in
this section.
■ Avoid touching pins, leads, and circuitry. Handle electronic components as little as possible.
■ If you remove a component, place it in an electrostatic-safe container.