mariantoader82 Posted October 25, 2014 Share Posted October 25, 2014 Sasiu mc049b are tranzistorul final linii ars ,am verificat condensatorii din primar si secundar sursa cit si pe cel din driver ,tensiunea B+ pe bec 115v (are tub plat si stabilizarea B=+ se face cu SEE 115 ). Am pus BU2508 DF se aprinde ledul de st by pentru 2sec si sursa intra in protectie,va rog frumos sa ma ajutati! Link to comment
BUGHIU Posted October 25, 2014 Share Posted October 25, 2014 (edited) ....impulsuri linii?!?! ....trafo linii....?!?!.....contacte imperfecte...?!? Pe bec sursa face ON/OFF?!? Edited October 25, 2014 by BUGHIU Link to comment
palcu ion Posted October 25, 2014 Share Posted October 25, 2014 e posibil trafo linii defect daca in rest e ok bo Link to comment
mariantoader82 Posted October 25, 2014 Author Share Posted October 25, 2014 In baza tranzistor final linii am 15682 hz cu bec conectat sursa face st by si am si sonor,am verificat toti condensatorii din BO bobina pe orizontala are 2,8ohmi . Link to comment
bobo Posted October 25, 2014 Share Posted October 25, 2014 (edited) sunt 3 mari suspecti: -trafo linii -bobina de deflexie h -finalul cadre tda4863a pt primarul trafului si bdh era bun testerul de spire in scurt,masurarea impedantei nu este concludenta. pt cadre- verificati daca nu aveti scurt pe recuperatele de +/-14v din secundarul trafo linii. la acest sasiu precum si la cw62b pica des integratul pe cadre. Edited October 25, 2014 by bobo Link to comment
mariantoader82 Posted October 25, 2014 Author Share Posted October 25, 2014 Pe recuperatele de +si - 14 v nu sunt scurturi am lasat in aer acesta doua bare si transformatorul de linii nu mai are zgomot la pornire dar nici inalta nu pleaca ,sursa intra in protectie . Cu ele conectate transformatorul are un zgomot dar nu normal la pornire si sursa intra in protectie. Link to comment
palcu ion Posted October 25, 2014 Share Posted October 25, 2014 Cu ele conectate transformatorul are un zgomot dar nu normal la pornire si sursa intra in protectie. ce inseamna oare? Link to comment
mariantoader82 Posted October 25, 2014 Author Share Posted October 25, 2014 Am inteles transformator de linii defect ,multumesc pentru sfaturi! Link to comment
mariantoader82 Posted November 16, 2014 Author Share Posted November 16, 2014 Am schimbat transformatorul de linii si tranzistorul final linii am pus Bu2520 D care se incalzeste excesiv ,l-am schimbat cu MD1803Df si acum televizorul functioneaza perfect. Link to comment
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