Panasonic TH-50PF30U Service Manual

Also see for TH-50PF30U: Operating instructions Operating instructions Service manual

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Panasonic TH-50PF30U Service Manual Manual pdf 4 page image

TH-50PF30U2 Warning2.1. Prevention of Electrostatic Discharge (ESD) to Electrostatically Sensitive (ES) DevicesSom e sem iconductor (solid state) devices can be damaged easily by static electricity. Such com ponents com m only are called Electrostatically Sensitive (ES) Devices. Examples of typical ES devices are integrated circuits and some field-effect transistors andsem iconductor “chip” components. The following techniques should be used to help reduce the incidence of com ponent damagecaused by electrostatic discharge (ESD).1. Immediately before handling any sem iconductor com ponent or sem iconductor-equipped assembly, drain off any ESD on yourbody 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 removing an electrical assem bly equipped with ES devices, place the assembly on a conductive surface such as alum inum 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)” cangenerate 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 m ediately before you are ready to install it. (Mostreplacem ent ES devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or com parable conductive material).7. Immediately before removing the protective material from the leads of a replacem ent ES device, touch the protective materialto the chassis or circuit assembly into which the device will be installed.CautionBe 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 brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity (ESD) sufficientto damage an ES device).4