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nationalistu

Daewoo DMQ-2166TXT

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Salut deranjez si eu cu o rugaminte am acest tv,la depanat si problema e ca nu se opreste pe cautare automata.Am verificat bobina AFT pe,pinul 44 de la TDA8362B am 4,03 V.

Deci orice sfat e binevenit,multumesc anticipat.

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    Cred ca e vorba de sasiu CP330.Schimbati condensatorul de filtraj pe linia 16V,de la trafo linii(filtreaza tensiunea ci intra in 7808 si 7812).Daca tot nu se rezolva as suspecta TDA8362 avariat la pin 44.

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Filtrajele iesa din discutie au fost verificate si schimbat tot ce era uscat.Cand actionez asupra bobinei L103,se modifica si tensiunea de la pinul 44 de la ic TDA8362B,intre 3...7 V,deci nu pare defect.

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   Verificati ce tensiune apare pe pin 19 (AFT)microprocesor,la acord pe post ar trebuii sa fie 2,5V(face excursie in cautare intre 0-5V).

De asemenea verificati si componentele dintre pin 19 microprocesor si pin 44 TDA8362(nu am schema in fata dar din amintiri parca printre componente este si un tranzistor pnp)

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Dupa ce l-am mai gadilat si tot nu functiona cum trebuie i-an schimbat L103,cu toate ca cea originala dadea continuitate la masuratori probabil condesatorul ceramic intern cu probleme.Deci sa rezolvat...in defect de kkt.

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