《彩色电视机维修技术六》

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1、彩色电视机维修技术六 画     面解      说      词字幕：显像管及附属电路   字幕：末级视放电路组成    图6-1 海信TC2518KB的末级视放电路    显像管及附属电路显像管是电视机的关键器件，作用是将图像信号转换成电视图像，传统电视都采用真空电子显像管。末级视放电路组成：由解码亮度输出的三级色差信号和亮度通道输出的亮度信号，在末级视放电路中得出三基色信号，经末级视频功放电路放大和亮平衡、暗平衡调整后，加到显像管三个阴极，控制显像管发射电子，重现图像。他们的电路比较简单，我们通过实际电路来学习他们的组成和主要

2、作用。这一电路是新型电视常用的复合视放电路，有两个三极管构成的共射-共基极输出的电路，由解码电路输出的三基色信号，经前置放大及功放后，经三个隔离电阻R547、R548、R549加到三个复合管的基极，前级V506Opinionsandsuggestionsontheparty'smasslineeducationalpracticeAccordingtothecentralandprovincial,municipalunifieddeployment,accordingtomunicipalPartycommittee"aboutc

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4、tions.AccordingtomyactualCounty,thecountytocarryouttheeducationpracticeputforwardthefollowingimplementationopinions.First,theoverallrequirementsCountycountyeducationpracticetotheeighteenPartyofeight,thespiritofthethethirdPlenarySessionofthe18thCPCCentralCommitteeastheg

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7、etransformationacrossefforts,tofurtherimplementthecentraleightregulationsand

8、etieswiththemasseslaw,highlightstylebuilding,carryoutthewholewindspirit,resolutelyopposeformalism,bureaucracy,hedonis