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tv platinium defect de volum


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am si eu o problema cu un tv platinium sky2122,chasiu 5800-A3Y111-00(03) 3y11,cu LA4285,LC863324A,LA76810A, la pornire volumul nu merge deloc ulterior dupa cateva minute incepe sa se auda foarte incet cu intreruperi(merge ce merge apoi se intrerupe dupa un timp iarasi isi da drumul si tot asa), abea se aude cu cursorul de volum dat la maxim.

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Scoateti din circuit de proba Q407=2SA1015. Schimbati Q004=2SC1815 si verificati R015, R024, R014. Montati un filtraj suplimentar de proba pe bara de 12V. Verificati la pinul 5 procesor sa aveti variatie de tensiune cand modificati volumul.

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