ID:12824389
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页数:26页
时间:2018-07-19
2、l,checkthatthefusetubehasbeenburned.Afterchangingthe3Afusetube,the500typemultimeterisusedtomeasurethecharginganddischargingphenomenaatthetwoendsoftheACinput,indicatingthatthereisstillashort-circuitfaultinthecircuit.Removeswitch(2 3、ice.baoxiu.com/baoxiu/point_query.jspxbrandId=243outletswarranty?"Target=_blank>SK1081),tomeasuretheresistancebetweenthepolesarezero,whichindicatesthatthetransistorhasbrokendown,andtheinspectionfoundasmallholeinapulsewidthmodulationcontrolcrackplateTDA4605.Afterrepl 4、acing2SK1081andTDA4605withnewpartsonebyone,thereisobviouschargeanddischargeintheACinputofthemeasuringpowersupply,butafterthepowerswitchisswitchedon,thepowerindicatorflashesout,andthereisnooutput.Afterfurthercarefulexamination,foundthatthecapacitance22J/63Visconnectedwit 5、hTDA4605andfootafinecrack.ThecapacitanceisremovedandthecapacitanceismeasuredbyDT-902capacitance/inductancemetertoindicatethatthecapacitanceisinfinite,indicatingthatthecapacitorhasbeendamaged.
6、bleshooting.
7、>
8、,thefirstobservationofLEDlight-emittingarrayofnormallighting,andnodirtshelter.Then,thethermalrecordingheadtest
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