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TV philips 21PT1542 58S dispare programul


attilaa0
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Buna ziua !Vreau sa intreb daca a mai intalnit cineva acest defect.Dau drumul la tv si e ok dar aproximativ 1-2 min dispare programul prins intra pureci parca cineva a tras mufa de antena afara.Daca las asa aprox 4 minute ar vrea sa prinda dar pentru mici fractiuni de secunde.Ce poate fi?Va multumesc

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observati ce se intimpla cu tensiunea in pinul 1 procesor...daca se modifica in acel timp care l-ati spus dv.de 1-2min si celelante tensiuni ramin constante inseama ca procesorul nu functionaza corect (procesor posibil defect ,verificati daca tensiunile de alimentare [a proc.] sunt bune),mai verificati quartz-ul...

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  • 3 years later...

Buna ziua, am si eu aceeasi problema expusa mai sus cu acelasi tip de tv. Am inlocuit tranzistorul 7505  C337 cu un BC337-25, am procedat si la schimbarea diodei zenner bzx5v1, a condensatorilor din sursa si in ultima instanta a selectorului de canale, problema pierderii programului persista. Va rog putin ajutor ca nu mai stiu ce sa ii fac..

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