Emerson N400C User Manual

Maintenance and Service Guide

Removal and Replacement Preliminaries

Many electronic components are sensitive to electrostatic 
discharge (ESD). Circuitry design and structure determine the 
degree of sensitivity. 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.

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 nor heard, but damage occurs.

An electronic device exposed to electrostatic discharge may not 
be affected at all and can work perfectly throughout a normal 
cycle. Or the device may function normally for a while, then 
degrade in the internal layers, reducing its life expectancy.

Use the following grounding precautions when packaging and 
transporting equipment:

■

To avoid hand contact, transport products in static-safe 
containers, such as tubes, bags, or boxes.

■

Protect all electrostatic-sensitive parts and assemblies with 
conductive or approved containers or packaging.

■

Keep electrostatic-sensitive parts in their containers until the 
parts arrive at static-free workstations.

■

Place items on a grounded surface before removing items 
from their containers.

■

Always be properly grounded when touching a sensitive 
component or assembly.