Panasonic TH-37PX50U Technical Manual

Also see for TH-42PX50U: Operating instructions Operating instructions Service manual Replacement procedure Operating instructions

Contents

Panasonic TH-37PX50U Technical Manual Manual pdf 8 page image

Safety PrecautionsPlease follow these general guidelines before servicing the models mentioned in thistechnical guide.1. While servicing, please observe the original lead dress. If a short circuit isfound, replace all the parts that have been overheated or damaged by theshort circuit.2. After servicing, please make sure that all the protective devices such asinsulation barriers, and insulation paper shields are properly installed.3. Some semiconductor (solid state) devices can be easily damaged by staticelectricity. Such components are commonly called Electrostatically Sensitive(ES) devices. Examples of typical ES devices are integrated circuits, somefield-effect transistors (FET) and semiconductor "chip" components. Thefollowing techniques should be used to help reduce the incidence of componentdamage caused by Electro Static Discharge (ESD).4. Drain off any Electro Static Discharge on your body by touching a known earthground, immediately before handling any semiconductor component orsemiconductor-equipped assembly. Alternatively, obtain and wear acommercially available discharging ESD wrist strap, which should beremoved prior to applying power to the unit as it may cause an electric shock.5. After removing an electrical assembly equipped with ES devices, place theassembly on a conductive surface such as an aluminum foil, to preventelectrostatic charge buildup or exposure on the assembly.6. Use a grounded-tip soldering iron to solder or unsolder ES devices.7. Use an anti-static solder removal device. Some solder removal devices notclassified as "anti-static (ESD protected)" can generate electrical chargesufficient enough to damage an ES device.8. Do not use freon-propelled chemicals. These can generate electrical chargesufficient enough to damage an ES device.9. Do not remove a replacement ES device from its protective package until you arejust ready to install it. (Most replacement ES devices are packaged with leadselectrically shorted together by conductive foam, aluminum foil or comparableconductive material).10. Immediately before removing the protective material from the leads of areplacement ES device, touch the protective material to the chassis or the circuitassembly into which the device will be installed.Caution: Please make sure that no power is applied to the chassis or circuitassembly, and observe all other safety precautions.11. Minimize bodily motions when handling unpackaged replacement ES devices.(Harmless motions such as the brushing together of your clothes fabric or thelifting of your foot from a carpeted floor can generate static electricity sufficientenough to damage an ES device).3