Samsung CKA4217L Service Manual page 6

1 Precautions
1-3 Electrostatically Sensitive Devices (ESD) Precautions
Some semiconductor (solid state) devices can be easily damaged by static electricity. Such components
are commonly called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are
integrated circuits and some field-effect transistors. The following techniques will reduce the incidence of
component damage caused by static electricity.
1. Immediately before handling any
semiconductor components or assemblies,
drain the electrostatic charge from your body
by touching a known earth ground.
Alternatively, wear a discharging wrist-strap
device. To avoid a shock hazard, be sure to
remove the wrist strap before applying power
to the monitor.
2. After removing an ESD-equipped assembly,
place it on a conductive surface such as
aluminum foil to prevent accumulation of an
electrostatic charge.
3. Do not use freon-propelled chemicals. These
can generate electrical charges sufficient to
damage ESDs.
4. Use only a grounded-tip soldering iron to
solder or desolder ESDs.
5. Use only an anti-static solder removal device.
Some solder removal devices not classified as
"anti-static" can generate electrical charges
sufficient to damage ESDs.
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6. Do not remove a replacement ESD from 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.
7. 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.
Caution: Be sure no power is applied to the
chassis or circuit and observe all
other safety precautions.
8. Minimize body motions when handling
unpackaged replacement ESDs. Motions such
as brushing clothes together, or lifting your
foot from a carpeted floor can generate
enough static electricity to damage an ESD.
9. Indicates ESDs on the Schematic Diagram
in this manual.
CKA42*7L/5227L