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HP 1150NR - Mini - Atom 1.6 GHz Maintenance And Service Manual Page 41

Hp envy 15 - maintenance and service guide.
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The following table shows how humidity affects the electrostatic voltage levels generated by different activities.
CAUTION: A product can be degraded by as little as 700 V.
Typical electrostatic voltage levels
Walking across carpet
Walking across vinyl floor
Motions of bench worker
Removing DIPS from plastic tube
Removing DIPS from vinyl tray
Removing DIPS from Styrofoam
Removing bubble pack from PCB
Packing PCBs in foam-lined box
Packaging and transporting guidelines
Follow these grounding guidelines when packaging and transporting equipment:
To avoid hand contact, transport products in static-safe tubes, bags, or boxes.
Protect ESD-sensitive parts and assemblies with conductive or approved containers or packaging.
Keep ESD-sensitive parts in their containers until they arrive at static-free workstations.
Place items on a grounded surface before removing them from their containers.
Always be properly grounded when touching a component or assembly.
Store reusable ESD-sensitive parts from assemblies in protective packaging or nonconductive foam.
Use transporters and conveyors made of antistatic belts and roller bushings. Be sure that mechanized equipment
used for moving materials is wired to ground, and that proper materials are selected to avoid static charging.
When grounding is not possible, use an ionizer to dissipate electric charges.
Maintenance and Service Guide
Relative humidity
35,000 V
15,000 V
12,000 V
5,000 V
6,000 V
800 V
2,000 V
700 V
11,500 V
4,000 V
14,500 V
5,000 V
26,500 V
20,000 V
21,000 V
11,000 V
Removal and replacement procedures
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V


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