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defect interesant daewo cp830f


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buna ,am o problema cu un tv =sursa strf6654, proc sda5555 a069, msp34116 b8 v3, mem 24lc16b,....se aude un ticait in st-by din choper , tv -ul porneste ,functioneaza 30 min dupa care intra in st-by, in timpul functionari tensiunile din secundar e ok, electrolitici am verificat,......daca aveti o ideie de ce ticaie in st-by cred ca de aici vine problema

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Probabil ca "ticaitul" este din cauza ca pe bara de 130v este o tensiune mai mare decit ar trebui sa fie in stand-by ...verificati piesele care fac ca tensiunea de 130v sa se reduca(in st-by) ...Q810 ,Q809,Q811,D811 si I806. Condensatoarele(electr.) din primar si sec. sursei le-ati verificat ,sper!?

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si daca nu ati fi avut tiristorul si stab. i823 montate ati avut o tensiune mult mai mare ...eu cred ca tot acele piese(scrise mai sus) sau ceva care are legatura cu ele sunt cu problema... verificati daca este buna r870...sau poate r829 intrerupta...

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