Compaq Presario 5BW Series, Maintenance And Service Manual

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The method for grounding must include a wrist strap or a foot strap at a grounded workstation. When seated, wear a wrist
strap connected to a grounded system. When standing, use footstraps and a grounded floor mat.
Static-Shielding Protection Levels
Method Antistatic Plastic Carbon-Loaded
Plastic
Metallized Laminate
Voltages 1,500 7,500 15,000
Grounding Workstations
To prevent static damage at the workstation, use the following precautions:
Cover the workstation with approved static-dissipative material. Provide a wrist strap connected to the
work surface and properly grounded tools and equipment.
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Use static-dissipative mats, heel straps, or air ionizers to give added protection.
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Handle electrostatic sensitive components, parts, and assemblies by the case or PCB laminate. Handle
them only at static-free workstations.
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Avoid contact with pins, leads, or circuitry.
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Turn off power and input signals before inserting and removing connectors or test equipment.
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Use fixtures made of static-safe materials when fixtures must directly contact dissipative surfaces.
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Keep work area free of nonconductive materials such as ordinary plastic assembly aids and Styrofoam.
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Use field service tools, such as cutters, screwdrivers, and vacuums, that are conductive.
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Use a portable field service kit with a static dissipative vinyl pouch that folds out of a work mat. Also use a
wrist strap and a ground cord for the work surface. Ground the cord to the chassis of the equipment
undergoing test or repair.
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Grounding Equipment
Use the following equipment to prevent static electricity damage to the equipment:
Wrist Straps are flexible straps with a minimum of 1 megohm ±10% resistance to the ground cords. To provide proper
ground, a strap must be worn snug against the skin. On grounded mats without banana-plug connectors, connect a wrist
strap with alligator clips.
Heelstraps/Toestraps/Bootstraps can be used at standing workstations and are compatible with most types of boots and
shoes. On conductive floors or dissipative floor mats, use them on both feet with a minimum of 1 megohm resistance
between operator and ground. To be effective, the conductive strips must be worn in contact with the skin.