Compaq Armada 1100 User Manual

Chapter 4 - Removal and Replacement Preliminaries
Introduction
This chapter provides general service information for the Compaq Armada
1100 Family of Personal Computers.
Adherence to the procedures and precautions described in this chapter is
essential for proper service.
Electrostatic Discharge
A sudden discharge of static electricity from a finger or other conductor
can destroy static-sensitive devices or microcircuitry. Often the spark is
neither felt or heard, but damage occurs. An electronic device exposed to
electrostatic discharge (ESD) may not be affected at all and will work
perfectly throughout a normal cycle. Or it may function normally for a
while, then degrade in the internal layers, reducing its life expectancy.
Networks built into many integrated circuits provide some protection, but
in many cases, the discharge contains enough power to alter device
parameters or melt silicon junctions.
Generating Static
Table 4-1 shows how different activities generate static electricity and
at different electrostatic voltage levels.
Table 4-1. Typical Electrostatic Voltages
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-- Relative Humidity --
Event 10% 40% 55%
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Walking across carpet 35,000 V 15,000 V 7,500 V
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Walking across vinyl floor 12,000 V 5,000 V 3,000 V
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Motions of bench worker 6,000 V 800 V 400 V
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Removing DIPS from plastic
tubes 2,000 V 700 V 400 V
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Removing DIPS from vinyl
trays 11,500 V 4,000 V 2,000 V
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Removing DIPS from Styrofoam 14,500 V 5,000 V 3,500 V
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Removing bubble pack from
PCBs 26,000 V 20,000 V 7,000 V
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Packing PCBs in foam-lined
box 21,000 V 11,000 V 5,000 V
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NOTE: 700 volts can degrade a product.
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Compaq Armada 1100 Specifications

General

Brand	Compaq
Model	Armada 1100
Category	Laptop
Language	English