t_alex92 Posted June 19, 2014 Share Posted June 19, 2014 La acest model de TV Daewoo DTH-29U3K sasiu CP830 F am problema de EW (imaginea este ca o perna). Am verificat cam tot ce este legat de EV. Traseu de la pocesor pana la integratul de BV I301, condesatorii nepolarizati din EW, rezistentele am inlocuit chiar si integratul I301, dar fara rezultate.. Nu stiu ce sa-i mai fac. Aveti vreo sugestie? Va Multumesc anticipat! Quote Link to comment Share on other sites More sharing options...
dan cod Posted June 19, 2014 Share Posted June 19, 2014 E cu TDA8358? daca poate fi ala defect.Acum vad ca ai schimbat CIul.Diodele din demodulator sunt ok?Bobina de EW? Quote Link to comment Share on other sites More sharing options...
leoncris Posted June 19, 2014 Share Posted June 19, 2014 (edited) Tensiuni masurasi ? C418 , schimbat ? R399 nu'i ... lungita ? Edited June 19, 2014 by leoncris Quote Link to comment Share on other sites More sharing options...
t_alex92 Posted June 19, 2014 Author Share Posted June 19, 2014 (edited) C418 original avea 27u l-am inlocuit cu altul, dar nu nou luat de pe alta placa are 7u. R399 este buna, bobina de EW era putin incalzita, am inlocuit-o nu chiar cu una originala de pe un sasiu CP521. Tda8358 inlocuit. Defectul se schimba in functie de continutul imaginii, in sensul ca se amplifica sau nu. Diodele din demodulator sunt D410 si D415 sau dioda dubla D404? oricum masurate par OK. Edited June 19, 2014 by t_alex92 Quote Link to comment Share on other sites More sharing options...
dan cod Posted June 19, 2014 Share Posted June 19, 2014 D404 esste dioda dubla din demodulator.Ce tensiune este pe pinul din mijloc? Quote Link to comment Share on other sites More sharing options...
t_alex92 Posted June 19, 2014 Author Share Posted June 19, 2014 Tensiunea variaza intre 26V si 35V. Quote Link to comment Share on other sites More sharing options...
leoncris Posted June 19, 2014 Share Posted June 19, 2014 C411 ... schimbat ? Quote Link to comment Share on other sites More sharing options...
t_alex92 Posted June 19, 2014 Author Share Posted June 19, 2014 Da, schimbat. Quote Link to comment Share on other sites More sharing options...
Toni Marginean Posted June 19, 2014 Share Posted June 19, 2014 Posibil, cum a zis si Dan, ca bobina de EW sa aiba spire in scurt. Daca pui mana pe ea dupa punere in functionare trebuie sa se incalzeasca. Quote Link to comment Share on other sites More sharing options...
t_alex92 Posted June 20, 2014 Author Share Posted June 20, 2014 Pai era incalzita cea originala, dar am schimbat-o cu una nu chiar identica de pe un alt sasiu CP521. Quote Link to comment Share on other sites More sharing options...
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