Preventing Electrostatic Damage To Equipment; Personal Grounding Methods And Equipment; Grounding The Work Area - HP EliteDesk 705 G1 Microtower Maintenance And Service Manual

Preventing electrostatic damage to equipment

Many electronic components are sensitive to ESD. Circuitry design and structure determine the
degree of sensitivity. The following packaging and grounding precautions are necessary to prevent
damage to electric components and accessories.
To avoid hand contact, transport products in static-safe containers such as tubes, bags, or
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boxes.
Protect all electrostatic parts and assemblies with conductive or approved containers or
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packaging.
Keep electrostatic sensitive parts in their containers until they arrive at static-free stations.
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Place items on a grounded surface before removing them from their container.
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Always be properly grounded when touching a sensitive component or assembly.
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Avoid contact with pins, leads, or circuitry.
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Place reusable electrostatic-sensitive parts from assemblies in protective packaging or
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conductive foam.

Personal grounding methods and equipment

Use the following equipment to prevent static electricity damage to equipment:
Wrist straps are flexible straps with a maximum of one-megohm ± 10% resistance in the ground
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cords. To provide proper ground, a strap must be worn snug against bare skin. The ground cord
must be connected and fit snugly into the banana plug connector on the grounding mat or
workstation.
Heel straps/Toe straps/Boot straps can be used at standing workstations and are compatible
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with most types of shoes or boots. On conductive floors or dissipative floor mats, use them on
both feet with a maximum of one-megohm ± 10% resistance between the operator and ground.
Method
Antistatic plastic
Carbon-loaded plastic
Metallized laminate

Grounding the work area

To prevent static damage at the work area, use the following precautions:
Cover the work surface with approved static-dissipative material. Provide a wrist strap connected
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to the work surface and properly grounded tools and equipment.
Use static-dissipative mats, foot 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.
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Handle them only at static-free work areas.
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
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surfaces.
Static Shielding Protection Levels
Voltage
1,500
7,500
15,000
Electrostatic discharge information 25