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4
Electrostatic discharge is a threat to the MSD electronics during
maintenance
All of the printed circuit boards in the MSD contain components that can be
damaged by electrostatic discharge (ESD). Do not handle or touch these
boards unless absolutely necessary. In addition, wires, contacts, and cables
can conduct ESD to the electronics boards to which they are connected.
This is especially true of the mass filter (quadrupole) contact wires which
can carry ESD to sensitive components on the side board. ESD damage may
not cause immediate failure but it will gradually degrade the performance
and stability of your MSD.
When you work on or near printed circuit boards, or when you work on
components with wires, contacts, or cables connected to printed circuit
boards, always use a grounded anti-static wrist strap and take other anti-
static precautions. The wrist strap should be connected to a known good
Earth ground. If that is not possible, it should be connected to a conductive
(metal) part of the assembly being worked on, but
nents, exposed wires or traces, or pins on connectors.
Take extra precautions, such as a grounded, anti-static mat, if you must
work on components or assemblies that have been removed from the MSD.
This includes the analyzer.
& $ 8 7 , 2 1
In order to be effective, an anti-static wrist strap must fit snugly (not tight). A loose strap
provides little or no protection.
& $ 8 7 , 2 1
Anti-static precautions are not 100% effective. Handle electronic circuit boards as little as
possible, and then only by the edges. Never touch components, exposed traces, or pins on
connectors and cables.
100
Maintaining the MSD
to electronic compo-
not
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