yulyan30 Posted October 7, 2012 Share Posted October 7, 2012 am si eu un tv orion T20MS pt ,,batranii,, , i-am schimbat tranzistorul D1555 cu 2SD1555.a mers ceva timp si iar s-a stricat. si tot 2SD1555 ars.din ce cauza se arde tr? Quote Link to comment Share on other sites More sharing options...
Toni Marginean Posted October 7, 2012 Share Posted October 7, 2012 In primul rand verificati ca tensiunile sursei sa nu fie prea mari. Quote Link to comment Share on other sites More sharing options...
jozsef46 Posted October 8, 2012 Share Posted October 8, 2012 Mai mult ca sigur,ai tensiune de baza prea mare din cauza STK-lui din sursa care este defect. Quote Link to comment Share on other sites More sharing options...
yulyan30 Posted October 8, 2012 Author Share Posted October 8, 2012 mersi. o sa schimb si STK-ul si revin Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 8, 2012 Share Posted October 8, 2012 Tranzistorul asta se mai duce din cauza lipiturilor reci pe driver.Daca bine tin minte iesirea din sursa are dioda de protectie deci nu prea are cum sa depaseasca tensiunea.Banuiesc ca este cel cu STK730-080.Grija cu stifturile din tipul asta existente pe piata. Quote Link to comment Share on other sites More sharing options...
yulyan30 Posted October 8, 2012 Author Share Posted October 8, 2012 da este cel cu STK730-080. am vazut pe alte topic-uri ca au avut ceva probleme cu stifturile. Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 8, 2012 Share Posted October 8, 2012 Ce tensiune ai la iesirea din sursa pe U1?Ai verificat lipiturile in zona driver?deasemeni schimba filtrajul pe driver.Se incalzeste tranzistorul sau nu?Ai putea lua in calcul chiar D1555 cel nou sa fie stift. Quote Link to comment Share on other sites More sharing options...
yulyan30 Posted October 8, 2012 Author Share Posted October 8, 2012 am verificat lipiturile. tr se incalzea cand l-am schimbat. acum nucel original era D1555 si l-am schimbat cu 2SD1555. Quote Link to comment Share on other sites More sharing options...
dan cod Posted October 8, 2012 Share Posted October 8, 2012 am verificat lipiturile. tr se incalzea cand l-am schimbat. acum nucel original era D1555 si l-am schimbat cu 2SD1555.Deci acum nu se incalzeste tranzistorul?Filtrajul pe driver l-ai schimbat?D1555 cu 2SD1555 e acelasi lucru. Quote Link to comment Share on other sites More sharing options...
yulyan30 Posted October 8, 2012 Author Share Posted October 8, 2012 o sa schimb si filtrajul pe driver si 2SD1555-ul Quote Link to comment Share on other sites More sharing options...
yulyan30 Posted October 8, 2012 Author Share Posted October 8, 2012 am schimbat tr si tv-ul a pornit, acum isi pierde putin imaginea (mai albicioasa )si dupa aceea isi revine.mentionez ca nu am schimbat STK-ul Quote Link to comment Share on other sites More sharing options...
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