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2.1
WARNINGS
All circuitry in this system contains a considerable number of MOS and other static
sensitive components. Static damage may or may not cause instant failure of a circuit
and therefore, could go undetected. This damage can cause reduced life span or early
system failure.
(a) If possible, switch off the RD-PS6/9 supplying the subrack under service when
changing modules. Module exchange can be done while the system is powered,
however, special care should be taken to ensure that modules are plugged in and
out squarely and do not touch other adjacent modules.
(b) Always discharge static from yourself by touching a conductive part of the main
equipment cabinet before handling any circuit module.
(c) All precautions should be taken not to handle electronic connection edges of circuit
boards. This is to minimize the chance of static damage and to avoid deposit of
acids from the skin on critical surfaces.
(d) Do not poke your finger at components or touch IC pins. These are all good ways of
causing static damage. Components are also physically delicate.
(e) All circuit modules equipped with memory components are to be protected from
sunlight and strong UV-light.
(f) If static potential is high from carpet floor coverings, chairs, or other furnishings,
additional grounding should be used by way of a wrist strap for the person handling
the installation of cards.
(g) Circuit modules with backup batteries can be easily damaged, as some parts of the
circuit are still live even when un-plugged. The backup battery itself can cause
damage if conductive objects make contact with the circuit board.
(h) To protect against physical damage leave individual circuit boards in their boxes and
in their anti-static bags until they are required.
Rev. C
CHAPTER 2:
ELECTROSTATIC DISCHARGE (ESD)
2-1
HMXMU01018
10/06
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