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tv plasma Samsung model PS42B450


Traian M

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Buna seara. Are cineva schema acestui  tv, am atasat cateva poze mai jos. Are sunet, nu are  imagine , am masurat tensiunile din alimentare si corespund cu ce este scris pe cablaj:Va=55v: VSC= -197 :VS=207, tensiunea de 5,5v corecta ,o tensiune notata cu Vg=  14v. Pe modulul Yscan este o tensiune ce este notata cu +15 v dar in schimb acolo masoara  -196v. Am scos panglicile de la buffere pe rand si nici o schimbare, am facut masurartori  la tranzistori ,diode de pe modulul Yscan si nu am gasit nimic in scurt,condensatorii vizual par ok. O idee cam pe unde ar trebui sa caut. multumesc.

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