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bubusmecherul

defect tv mivar

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Am primit acest tv mivar 14M4,cu defectul nu porneste[mort],are sursa aparte langa sasiu,am schimbat tea2261 dar tot nu porneste,am decuplat sursa de sasiu si am masurat tensiunile in loc de 13v si 105v,am 144v si18v,,cand cuplez sursa de sasiu nu mai am nici o tensiune,sasiu CS1046/2, asa scrie pe sasiu,st92195b5b1/eet ,tda8840, tda8356,tda7056, tda6107,tea2261,24c01,ce pot face.

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Scoti BU2508 si pui un bec de 70W pe bara de 105V. Dai drumul la TV si masori tensiunile scoase de sursa.Daca scoate tensiuni bune, verifici/inlocuiesti tranzistorul BU2508 , schimbi condensatorul de cuplaj din baza si incerci iar. Trebuie verificati in general toti condensatorii electrolitici din sursa, finalul linii si baleiaj vertical, dupa un timp cam cedeaza. Daca nu ai ESR-metru, schimba-i ca nu-s multi si nici scumpi.

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