rdl Posted April 20, 2010 Share Posted April 20, 2010 Am un defect care la prima vedere am spus ca-l voi rezolva rapid, dar..... Este vorba de un tv. clatronic ctv 287 vt, care urmatoarea manifestare: - daca il pornesti de la butonul de retea functioneaza normal, dar cand il opresti din telecomanda nu il mai poti porni deoarece dispare tensiunea de alimentare din secundar. Am pus o sarcina pe tensiunea de alimentare si am tensiunile normale in secundar. Daca desurubez becul din sarcina in cateva secunde dispar tensiunile.din secundar. In sursa am un TDA4601 . Am schimbat toti condensatori din sursa, am verificat rezistentele si C-urile nepolarizate precum si tda 4601 si tot aceasi manifestare.Concluzia ar fi ca sursa nu functioneaza decat in sarcina . Are cineva vreo idee? Link to comment Share on other sites More sharing options...
naebv Posted April 20, 2010 Share Posted April 20, 2010 Verificati si PTC2 din pin 9 TDA4601. Link to comment Share on other sites More sharing options...
tv1 Posted April 20, 2010 Share Posted April 20, 2010 Formenti chassis F11 http://www.eserviceinfo.com/downloadsm/ ... 20841.html part1 http://www.eserviceinfo.com/downloadsm/ ... 20841.html part2 http://www.eserviceinfo.com/downloadsm/ ... 20841.html part3 http://www.eserviceinfo.com/downloadsm/ ... 20841.html part4 Link to comment Share on other sites More sharing options...
rdl Posted April 22, 2010 Author Share Posted April 22, 2010 Am rezolvat, am inlocuit PTC2 cu o dioda ba159 si am inlocuit rezistenta care era in serie cu PTC-ul cu una de 8,2K si acum functioneaza. Nu am avut PTC si de aceea am recurs la aceasta modificare.Mersi de sugestie! Link to comment Share on other sites More sharing options...
radu ionel Posted April 24, 2010 Share Posted April 24, 2010 In loc de PTC2 ,BA159+ rez.27k in serie Link to comment Share on other sites More sharing options...
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