Arn Ing; Prevention Of Electrostatic Discharge (Esd) To Electrostatically Sensitive (Es) Devices - Panasonic TH-103PF12E Service Manual

TH-103PF12E
2 Warning
2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensi­
tive (ES) Devices
Some sem iconductor (solid state) devices can be damaged easily by static electricity. Such com ponents com m only are called Elec­
trostatically Sensitive (ES) Devices. Exam ples of typical ES devices are integrated circuits and some field-effect transistors and
sem iconductor "chip" components. The following techniques should be used to help reduce the incidence of com ponent damage
caused by electrostatic discharge (ESD).
1. Immediately before handling any sem iconductor com ponent or sem iconductor-equipped assembly, drain off any ESD on your
body by touching a known earth ground. Alternatively, obtain and wear a com m ercially available discharging ESD w rist strap,
which should be removed for potential shock reasons prior to applying power to the unit under test.
2. After rem oving an electrical assembly equipped with ES devices, place the assem bly on a conductive surface such as alumi­
num foil, to prevent electrostatic charge buildup or exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder ES devices.
4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static (ESD protected)" can
generate electrical charge sufficient to dam age ES devices.
5. Do not use freon-propelled chem icals.
6. Do not remove a replacem ent ES device from its protective package until im m ediately before you are ready to install it. (Most
replacem ent ES devices are packaged with leads electrically shorted together by conductive foam, alum inum foil or com para­
ble conductive material).
7. Imm ediately before removing the protective material from the leads of a replacem ent ES device, touch the protective material
to the chassis or circuit assem bly 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 bodily motions when handling unpackaged replacem ent ES devices. (Otherwise ham less motion such as the brush­
ing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient
to dam age an ES device).
These can generate electrical charges sufficient to damage ES devices.
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