Grounding Methods; Grounding Workstations - Compaq ArmadaStation Maintenance And Service Manual

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Grounding Methods

The method for grounding must include either 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.
Method
Antistatic plastic
Carbon-loaded plastic
Metallized laminate

Grounding Workstations

To prevent static damage at the workstation, follow these precautions:
Cover the workstation with approved static-dissipative material. Provide a wrist
strap connected to the work surface and properly grounded tools and equipment.
Use static-dissipative mats, heel straps, or air ionizers to provide added protection.
Handle electrostatic sensitive components, parts, and assemblies by the case or
PCB laminate. Handle them only at static-free workstations.
Avoid contact with pins, leads, or circuitry.
Turn off power and input signals before inserting and removing connectors or test
equipment.
Use fixtures made of static-safe materials when fixtures must directly contact
dissipative surfaces.
Keep work area free of conductive materials such as ordinary plastic assembly
aids and plastic foam.
Use field service tools, such as cutters, screwdrivers, and vacuums, that are
conductive.
Use a portable field service kit with a static-dissipative vinyl pouch that folds out
into 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.
Table 4-2
Static Shielding Protection Levels
Voltage
1,500 V
7,500 V
15,000 V
Removal and Replacement Preliminaries 4-3