Samsung TXJ2766 Service Manual - Page 6

Precautions for Electrostatically Sensitive Devices

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Precautions 1-3 Precautions for Electrostatically Sensitive Devices (ESDs) 1. Some semiconductor (Òsolid stateÓ) devices are easily damaged by static electricity. Such 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 semicon ductor components or assemblies, drain the electrostatic charge from your body by touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying powerÑ 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 ESDs. 5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs. 6. Use only an anti-static solder removal device. Many solder removal devices are not rated as Òanti-staticÓ; these can accumulate sufficient electrical charge to damage ESDs. 7. 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. 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 handling unpackaged replacement ESDs. Motions such as brushing clothes together, or lifting a foot from a carpeted floor can generate enough static electricity to damage an ESD. 1-4 Samsung Electronics

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1-3
Precautions for Electrostatically Sensitive Devices
(ESDs)
1.
Some semiconductor (²solid state³) devices
are easily damaged by static electricity. Such
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 semicon
ductor components or assemblies, drain the
electrostatic charge from your body by
touching a known earth ground. Alternatively,
wear a 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
ESDs.
5.
Use only a grounded-tip soldering iron when
soldering or unsoldering ESDs.
6.
Use only an anti-static solder removal device.
Many solder removal devices are not rated as
²anti-static³;
these can accumulate sufficient
electrical charge to damage ESDs.
7.
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.
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 handling
unpackaged replacement ESDs.
Motions such
as brushing clothes together, or lifting a foot
from a carpeted floor can generate enough
static electricity
to damage an ESD.
Precautions
1-4
Samsung Electronics