csopike Posted April 19, 2014 Share Posted April 19, 2014 salutare, am si eu o problema cu un adaptor pentru monitor, adaptoru este model k-1205 scoate 12v si 4.2A, problema este urmatoarea: nu are curent constant de 12v, are 12volti scade la 5-6 volti. iar urca la 12volti, iar scade la 5-6 volti, schimbarea de la 12 la 5-6 volti si viceversa se face rapid, adica nu sta mult la 12 volti si dupa acea sa scada, cateva secunde dureaza un ciclu, ledul verde palpaie, se aprinde cand urca la 12, se stinge cand scade la 5-6 volti, stie cineva ce ar putea fi? multumesc Quote Link to comment Share on other sites More sharing options...
sorinpavel Posted April 19, 2014 Share Posted April 19, 2014 Pai desfaceti-l si posibil sa vedeti niste conzi umflati.Succes Quote Link to comment Share on other sites More sharing options...
dan cod Posted April 19, 2014 Share Posted April 19, 2014 Si poate referinta poate e cu tl431. Quote Link to comment Share on other sites More sharing options...
csopike Posted April 19, 2014 Author Share Posted April 19, 2014 am desfacut, nu are condensatori umflati, cu aparatul de masura nu imi da nimic defect, poate fi de la condensatori? chiar daca nu sunt umflati??? Quote Link to comment Share on other sites More sharing options...
csopike Posted April 19, 2014 Author Share Posted April 19, 2014 Si poate referinta poate e cu tl431. da e cu tl431, sa fie ala problema??? Quote Link to comment Share on other sites More sharing options...
csopike Posted April 19, 2014 Author Share Posted April 19, 2014 sal. variatiile sunt atat in gol cat si conectat la monitor. Quote Link to comment Share on other sites More sharing options...
cristronic Posted April 19, 2014 Share Posted April 19, 2014 Integratul acela smd,este cumva UC3842 sau echivalent? Asa se manifesta cand este uscat condensatorul electrolitic care filtreaza tensiunea de alimentare a integratului. Quote Link to comment Share on other sites More sharing options...
csopike Posted April 19, 2014 Author Share Posted April 19, 2014 AM MAI PUS DOUA POZE, POATE ASA REUSIM SA GASIM BUBA. Quote Link to comment Share on other sites More sharing options...
iuliantv Posted April 20, 2014 Share Posted April 20, 2014 posibil optocuplor,si sau dioda dubla de pe bara de 12v,sau cablu din sursa spre monitor sa fie strapuns pe undeva,asta daca nu cumva l-ati deconectat deja de la sursa,success si un PASTE FERICIT Quote Link to comment Share on other sites More sharing options...
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