1-2 Samsung Electronics
Precautions
1-2 ESD Precautions
Certain semiconductor devices can be easily
damaged by static electricity. Such components are
commonly called “Electrostatically Sensitive (ES)
Devices”, or ESDs. Examples of typical ESDs are:
integrated cir cuits, some field effect transistors, and
semiconductor “chip” components.
The techniques outlined below should be followed
to help r educe the incidence of component damage
caused by static electricity.
CAUTION: Be sure no power is applied to the
chassis or circuit, and observe all other safety
precautions.
1. Immediately before handling a semiconductor
component or semiconductor-equipped assembly,
drain off any electr ostatic char ge on your body
by touching a known earth ground. Alternatively,
employ a commercially available wrist strap
device, which should be r emoved for your personal
safetyr easons prior to applying power to the unit
under test.
2. After r emoving an electrical assembly equipped
with ESDs, place the assembly on a conductive
surface, such as aluminum or copper foil, or
conductive foam, to prevent electr ostatic char ge
buildup in the vicinity of the assembly.
3. Use only a grounded tip soldering iron to solder
or desolder ESDs.
4. 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.
5. Do not use Freon-propelled chemicals. When
sprayed, these can generate electrical charges
sufficient to damage ESDs.
6. Do not remove a replacement ESD from its
protective packaging until immediately before
installing it. Most r eplacement ESDs are
packaged with all leads shorted together by
conductive foam, aluminum foil, or a comparable
conductive material.
7. Immediately beforeremoving the protective
shorting material from the leads of a replacement
ESD, touch the protective material to the chassis
orcircuit assembly into which the device will be
installed.
8. Maintain continuous electrical contact between
the ESD and the assembly into which it will be
installed, until completely plugged or soldered
into the cir cuit.
9. Minimize bodily motions when handling
unpackaged replacement ESDs. Normal motions,
such as the brushing together of clothing fabric
and lifting one’s foot fr om a carpeted floor, can
generate static electricity suf ficient to damage an
ESD.
1-3 Lithium Battery Precautions
1. Exercise caution when replacing a Lithium
battery. Ther e could be a danger of explosion and
subsequent operator injury and/or equipment
damage if incorrectly installed.
2. Be sure toreplace the battery with the same or
equivalent type recommended by the
manufacturer.
3. Lithium batteries contain toxic substances and
should not be opened, crushed, or burned for
disposal.
