Motorola DIMETRA MTS 2, Инструкция по установке, настройке и базовому обслуживанию

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Appendix
C
Static Precautions and ESD Strap
This Appendix covers the following topics:
•
"Static Sensitive Precautions "
•
"ESD Wrist Strap Safety Precautions"
Static Sensitive Precautions
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The static grounding wrist strap (Motorola P/N 4280385A59) must always be used when
handling any board or module within the MTS. Many of the boards or modules used in the
MTS equipment are vulnerable to damage from static charges.
Extreme care must be taken while handling, shipping, and servicing these boards or modules.
To avoid static damage, observe the following precautions:
•
Prior to handling, shipping, and servicing MTS equipment, connect a wrist strap to the
grounding clip on the equipment cabinet which is located at the bottom of the cabinet and
marked with a yellow label. This discharges any accumulated static charges.
Use extreme caution when wearing a conductive wrist strap
near sources of high voltage. The low impedance provided by
the wrist strap also increases the danger of lethal shock should
accidental contact with high voltage sources occur.
•
Avoid touching any module, board circuitry, including any connector pins with your hands.
•
Before removing a board or module, disconnect its individual power supply
fi
rst.
•
Avoid carpeted areas, dry environments, and certain types of clothing (silk, nylon, and
so on) during service or repair due to the possibility of static buildup.
•
Apply power to the circuit under test before connecting low impedance test equipment
(such as pulse generators). When testing is complete, disconnect the test equipment
before power is removed from the circuit under test.
6802800U74-N September 2009
C-1