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SAMSUNG LE32R81BX PLACA ALIMENTARE BN44-00155A


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salut

incerc si eu sa depanez aceasta sursa.

Simptome: led rosu aprins. Nu porneste de la buton, daca pornesc din telecomanda se singe ledul, dar sursa nu da curent nici la invertoare nici catre placa de baza.
Unde ar trebuii sa am 12v catre placa de baza flctueaza intre 9v si 5c si unde ar trebui sa am 24v pentru invertoar fluctueaza intre 19v si 11 v.


Am schimbat electroliticii umflati (cb 805 si CM 861) .
Am 5.2v stby constant.
Tensiunile de dupa puntea de diode variza mult. Pe condensatorul CP803 am intre 350 i 380 de vcc, indiferent daca tv este pornit sau nu.
se aude un zgomot ciudat in zona puntii de diode .
Rezistenta RM801 verificata.
Am verificat toate diodele. tranzistorii par si ei a fi ok.

Pe iesirea de la integratul A159 (adica inre pin 2 si 3) tensiunea fluctueaza intre 18 si 19v. cand apas pe telecomanda sa porneasca si se stinge ledul fluctueaza intre 17 si 18 v.
Are cineva vreun sfat?
Presupun ca am vreun condensator stricat, desi vizual ei arata bine.

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