Panasonic TH-50PV600AZ, Руководство по обслуживанию

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TH-50PV600AZ / TH-50PV600H / TH-50PV600M / TH-50PV600M T
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3 Prevention of Electro Static Discharge (ESD) to
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components comm only are called
Electrostatically Sensitive (ES) Devices. Examples 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 electro static discharge (ESD).
1. Im m ediately 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 comm 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. A fter removing an electrical assembly equipped with ES devices, place the assembly on a conductive surface such as alminum
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 damage ES devices.
5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ES devices.
6. Do not remove a replacem ent ES device from its protective package until im mediately before you are ready to install it. (Most
replacement ES devices are packaged with leads electrically shorted together by conductive foam , alminum foil or comparable
conductive material).
7. Im m ediately before removing the protective material from the leads of a replacement ES device, 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 bodily motions when handling unpackaged replacement ES devices. (Otherwise hamless motion such as the brushing
together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficient to
damage an ES device).
IMPORTANT SAFETY NOTICE
There are special components used in this equipment which are imporant for safety.
These parts are marked by Д in the schematic diagrams, Exploded Views and replacement parts list. It is
essential that these critical parts should be replaced with manufacturer's specified parts to prevent shock, fire, or
other hazards. Do not modify the original design without permission of manufacturer.
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