Electrostatic Discharge; Generating Static - Compaq 1200US - Presario - Celeron 800 MHz Maintenance And Service Manual

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A sudden discharge of static electricity
from a finger or other conductor can
destroy static-sensitive devices or
Often the spark is neither felt nor heard, but damage occurs.
An electronic device exposed to an electrostatic discharge
(ESD) may not be affected at all and will work perfectly
throughout a normal cycle. Although it may function normally
for a while, it is possible for the exposed device's internal
layers to degrade, reducing its life expectancy considerably.
Networks built into multiple integrated circuits provide some
protection, but in many cases, the discharge can contain
enough power to alter device parameters and melt silicon
junctions.
This table shows the different electrostatic voltage levels generated
Typical Electrostatic Voltages
Event
Walking across carpet
Walking across vinyl floor
Motions of bench worker
Removing DIPS from
plastic tubes
Removing DIPS from vinyl
trays
Removing DIPS from
Styrofoam
Removing bubble pack
from PCBs
Packing PCBs in foam-lined
box
Return to Removal & Replacement Procedures
Maintenance & Service Guide
Presario 1200 Series
Model: 1245
| Notice | Preface
| Removal & Replacement Procedures
Pin Assignments
microcircuitry.

Generating Static

by various activities.
NOTE: 700 volts can degrade a
product.
35,000 V
12,000 V
11,500 V
14,500 V
26,000 V
21,000 V
| Product Description
| Battery Pack Operations

Electrostatic Discharge

Relative Humidity
10%
6,000 V
2,000 V
| Troubleshooting
| Specifications
40%
15,000 V
5,000 V
800 V
700 V
4,000 V
5,000 V
20,000 V
11,000 V
55%
7,500 V
3,000 V
400 V
400 V
2,000 V
3,500 V
7,000 V
5,000 V