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Mesaj Scris de Viorel Dum 10 Oct 2010 - 21:36

Pentru inceput doresc sa adresez ,,Buna seara ! tuturor .Am tv Keymat model KECR1461 cu procesor ST92195C7B1,memorie 24C16,TDA8174A baleaj vertical sasiu nu-l pot da ptr. ca nu se vede bine pe cablaj,sursa tranzistorizata cu 2SC5586.Problema este ca la inceput am gasit tranz.V501 C5586 scurt e-c,tranz.V512 2SC3807 la fel scurt e-c ,siguranta arsa in primarul chooperului,iar in secundar dioda VD556 =RGP10J in scurt.Dupa inlocuirea pieselor,defecte sursa a pornit ptr. o perioada scurta de timp 2-3 minute,reusind totusi sa masor, tensiunea B1=40v,in loc de 115v,B2 =15v,etc.iar dupa accea sa oprit de tot.La o noua verificare am gasit tranz.V501=2SC5586 in scurt E-C.Acum sursa nu mai porneste doar se aude un tiuit si tensiunile din secundar toate sunt nule.As dori si eu un sfat in rezolvarea problemei mele.In spernta caci am fost obositor cu descrierea fenomenelor din tv-ul meu,urez ,,Bafta tuturor!''Revin cu mici detali despre tv Keymat KECR1461-ST V02/06 chassis IC's.Multumesc

Viorel

Numarul mesajelor : 6
Varsta : 57
Localizare : Zalau
Data de inscriere : 10/10/2010

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