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ELFORUM - Forumul electronistilor

Defect la Vestel 11ak36

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Manifestarea e urmatoarea: sursa functioneaza pe sarcina de 75W, la comanda power on ledul se face verde dar etajul BO nu intra in functiune .Tensiunile par toate ok, procesorul pare sa raspunda la comenzi (cel putin pornire-oprire). In momentul cand tv`ul e in power on (led aprins verde) pe pinul H-out al STV2248H am 6V .Traseul de la pinul H-out prin tranzistor driver (stx112) pana la baza BU808DFI e corect .Nu imi dau seama unde poate fi problema .

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Eu urmaresc cei 15626 hz de la iesirea integratului pina in baza Bu-ului, cu frecventmetrul sau osciloscopul.Ai facut-o?

Mltumesc ,era buna ideea asta dar nu intentionez sa imi castig existenta din depanare tv, asa ca, cumpararea unui osciloscop mi se pare o afacere scumpa .E posibil sa fie defect stx112 , e un darlinton .Mai cercetez .De curiozitate cat e un osciloscop la mana a doua ? Ce am vazut eu pana acum aveau preturi enorme chiar second hand .
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