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poplex22

sursa 715g3816-p01-h20-002u lcd Philips 32pfl3606h

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va salut, sursa contine si invertorul cu UBA2071AF, problema la aceasta sursa este pe partea de invertor, dupa 10-15 min. de functionare lampile se sting, am anulat protectia pe c.i. si dupa 10-15min se ard cei 2 tranzistori mos-fet din primarul trafului invertor, am schimbat c-ul de cuplaj idem se comporta, am ars 3 perechi de tranzistori ,n-am gasit nimic nimic altceva defect, suspectez traful invertor : TMS94949CT ??, dvs. ce parere aveti ?

sursa Philips 32pfl3606h.1.jpg

oem_715g3816_[sch]_sch.pdf

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traf invertor,lampi cu probleme,deobicei traful se incalzeste destul de rapid dupa anularea protectiei,daca el e buba,desfaceti panelul vedeti sa nu fie lampile prea obosite,crapate,descarcari la masa.......

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Posted (edited)

Condesatorul de cuplaj cu traful l-ai schimbat? Pune unul mult mai mic ca valoare pt test.

Condesatorul din pinul FS (de bootstrap) poti sa-l schimbi de test?

Edited by sesebe
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- pt. anularea protectiei am cautat pe net. si se pune led la masa din pin 6 al c.i. - am schimbat conzii cuplaj si bootstrap manifestare idem

are cineva un traf disponibil ?

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Acum 3 ore, iuliantv a spus:

traf invertor,lampi cu probleme,deobicei traful se incalzeste destul de rapid dupa anularea protectiei,daca el e buba,desfaceti panelul vedeti sa nu fie lampile prea obosite,crapate,descarcari la masa.......

OK...!

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