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dorutu

sursa 11ak30a14

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Tv a avut sursa praf de la un fulger.Am schimbat mos-ul, integratul,optocuplorul,tl 431,tr de langa tl.Tv-ul functioneaza bine dar sursa scoate un fasait deranjant cand tv-ul este pornit,in stand-by nu se aude nimic.Care sa fie cauza?Va multumesc!

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Tv a avut sursa praf de la un fulger.Am schimbat mos-ul, integratul,optocuplorul,tl 431,tr de langa tl.Tv-ul functioneaza bine dar sursa scoate un fasait deranjant cand tv-ul este pornit,in stand-by nu se aude nimic.Care sa fie cauza?Va multumesc!

tensiunea pe care o scoate e corecta? Probabil mai are vreun condensator defect.
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Din condensatori vine defectul asta! Am mai intalnit asa ceva.In st-by nu face zgomot pentru ca nu are consum.Verifica prin inlocuire condensatorii electrolitici din primarul sursei.Cu un osciloscop aflai repede de unde provine acel fasait.

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