dragutzzz_112 Posted February 18, 2013 Share Posted February 18, 2013 problema la acest tv este: imi sta in in stand-by ledu sosu si cand ii dau +program sa porneasca mi-se stinge ledul 2-3 secunde si revine la loc in stand-by am masurt tensiunile sunt bune, nu stiu ce sai mai fac... ma poate ajuta cineva ? Link to comment
validae Posted February 18, 2013 Share Posted February 18, 2013 Ai deconectat tranzistorul de pe baleiaj orizontal si conectat bec de 60W in loc sa vezi daca tine sursa ? Masoara tranzistorul final linii, poate e strapuns, schimba-i condensatorul de cuplaj din baza.Cum ai masurat tensiunile daca trece in st-by ?Schimba condensatorii electrolitici din sursa, sau daca poti masoara-i cu ESR-metru.Ar fi bine sa ai asa ceva printre scule daca te bagi prin televizoare. Link to comment
dragutzzz_112 Posted February 18, 2013 Author Share Posted February 18, 2013 da am decuplat tranzistoru final bu808dfi iam pus si bec de 60 w . nu tine sursa tine 3 secunde si se stinge becu. am masurat tensiunile cand da sa plece am 113v.. pe condesatorul general am 320vpe baza la tranzistor am 113v cand da sa plece. Link to comment
bobo Posted February 18, 2013 Share Posted February 18, 2013 pe baza la tranzistor am 113v cand da sa plece.cum sa aveti 113v in baza finalului linii? aveti 113v in colector si asta pt ca nu exista comanda in baza tranzistorului ca altfel ramaneati fara aparat de masura. verificati daca jungla se alimenteaza corect si de ce nu nu genereaza impulsuri h out. Link to comment
dragutzzz_112 Posted February 18, 2013 Author Share Posted February 18, 2013 pardon in colector am 113v am gresit Link to comment
BUGHIU Posted February 18, 2013 Share Posted February 18, 2013 Uitati-va aici: viewtopic.php?f=17&t=124195 Link to comment
dragutzzz_112 Posted February 18, 2013 Author Share Posted February 18, 2013 iam rezolvat problema cu plecatu era tda8174aw in scurt lam inlocuit am gasit si o dioda in scurt langa integrat iar acum porneste cu linie pe miljoc. care ar mai pute fi cauza? Link to comment
dan cod Posted February 18, 2013 Share Posted February 18, 2013 Alimentare ai pe CIul asta? Link to comment
dragutzzz_112 Posted February 19, 2013 Author Share Posted February 19, 2013 Multumiri tuturor. Problema rezolvata. Iam pus alt final cadre TDA8174aw cel care lam pus mai inainte era defect... Link to comment
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