Samsung CS21M16MNZXXST, Service Manual

1. Some semiconductor (“solid state”) 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
“anti-static”;  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

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Samsung Electronics

1-3  Precautions for Electrostatically Sensitive Devices  (ESDs)