HarmanKardon-AVR365_230-avr-维修说明书手册含电器原理图

Haman KardonAVR 365/230V Service ManualELECTROSTATICALLY SENSITIVE (ES)DEVICESSome semiconductor (solid state)devices can be damaged easily by static electricity.Such components commonly are calledElectrostatically Sensitive (ES)Devices.Examples of typical ES devices are integrated circuits and some field effect transistors andsemiconductor "chip'components.The following techniques should be used to help reduce the incidence of component damage caused by static electricity.1.Immediately before handling any semiconductor component or semiconductor-equipped assembly,drain off any electrostatic charge onyour body by touching a known earth ground.Alternatively,obtain and wear a commercially available discharging wrist strap device,which should be removed for potential shock reasons prior to applying power to the unit under test.2.After removing an electrical assembly equipped with ES devices,place the assembly on a conductive surface such as aluminum foil,toprevent electrostatic charge build-up 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"can generate electrical chargessufficient to damage ES devices.5.Do not use freon-propelled chemicals.Thesecan generateelectrical change sufficient to damage ES devices.6.Do not remove areplacement ES device from its protective package until immediately before you are ready to install it.(Most replacementES devices are packaged withleads electrically shorted together by conductive foam,aluminum foil or comparable conductive material.)7.Immediately before removing the protective material from the leads of a replacement ES device,touch the protective material to thechassis or circuit assembly into which the device will be installedCAUTION: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 hammless motion such as the brushing togetheror your clothes fabricor the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ES devices.PRODUCT SAFETY NOTICEEach precaution in this manualshould be followedduring servicing.Components identified with the EC symbolin the parts list are special significance to safety.When replacing a component identified with,use only the replacement parts designated,or parts with the same ratingsor resistance,wattage,or voltage that are designated in theparts list in this manual.Leakage-current or resistance measurements must be made to determine that exposed parts are acceptablyinsulated from the supply circuit before retuming the product to the customer.Page 2 of 176