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ELFORUM - Forumul electronistilor

FREEDOM nu face stby


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Am un tv Freedom model 4051 ,echipat cu pocesor PCA84C640-030, BV TDA1170, sunet TDA8138 ,si TDA8217, la care am avut sursa defecta .Am reparat sursa care este echipata cu TEA2019, tv functioneaza norma face si stby. dar dupa circa 10 minute cand vreau sa-l trec in stby acesta se opreste dar nu se decupleaza BV.si-mi apare o dunga.Va rog sa ma ajutati cu o schema sau cu o solutie.Va multumesc! Ambele tensiuni scoase de sursa sunt exacte si anume 105v ,si 16 v. :jytuiyu

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cat de diferita poate fi schema unui bloc de comanda cu PCA...??????urmareste traseul de stand-by, incepand cu pinul 41 al procesorului si vezi unde este hiba.atentie la TDA8138(comanda pin 4) ,caci pe acest stabilizator multiplu plus resetul, se face comanda de stand- by, din cate imi amintesc.SUCCES!

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Salut, intai verifica daca PCA-ul iti face cele doua stari ( ON, OFF ) masurand pe pinul 41 cele doua stari astfel:-in standby = 5 volti-pornit = catre 0 voltiDupa ce ai verificat astea doua stari, verifica urmatoarele componente: R862, R816, R815, T814, C129, IC101.Succes.

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