Precautions For Electrostatically Sensitive Devices(Esds) - Hitachi CPX2102MS Service Manual

8. Always connect a test instrument s ground lead to the instrument chassis ground before
connecting the positive lead always remove the instrument s ground lead list.
1-3. Precautions for Electrostatically Sensitive Devices (ESDs)
1. Some semiconductor ("solid state") devices are easily damaged by static electricity.
Such some components are called Electrostatically Sensitive Devices (ESDs) examples
include integrated circuits and some field-effect transistors. The following techniques will
reduce the occurrence of component damage caused by static electricity.
2. Immediately before handling any semiconductor components or assemblies, drain the
electrostatic charge from your body by, touching a known earth ground. Alternatively,
wear the discharging wrist-strap device. (Be sure to remove it prior to applying power-
this is an electric shock precaution)
3. After removing an ESD-equipped assembly, place it on a conductive surface such as
aluminum foil to prevent accumulation of electrostatic charge.
4. Do not use freon-propelled chemicals. These can generate electrical charges that
damage ESD
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5. Use only a grounded-tip soldering iron when soldering or unsoldering ESD
6. Use only an anti-static solder removal device. Many solder removal devices are not rated
as "anti-static" these can accumulate sufficient electrical charge to damage ESD
7. Do not remove a replacement ESD front its protective package until you are ready to
install it. Most replacement ESDs are packaged with leads that are electrically shorted
together by conductive foam, aluminum foil or other conductive materials.
8. Immediately before removing the protective material from the leads of a replacement
ESD, touch the protective material to the chassis or circuit assembly into which the
device will be installed.
9. Minimize body motions when unpackaged replacement ESDs. Motion, such as brushing
clothes together, or lifting a foot from a carpeted floor can generate, enough static
electricity to damage an ESD.
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