essu Posted December 10, 2009 Share Posted December 10, 2009 SALUTARETV GRUNDIG chassis BEKO 12.6Am deconectat tensiunile de baza cea de 115v si iam pus sarcina artificiala bec 60w ,tensiunea buna.cea de 12v am lasato an aeram schimbat si condesatorul de 47Micro/160vam anlocuit tranzistorul cu unul nou si mi la crapat dupa 10sec dar an acest timp am avut volmetru pe esire [u1+115V] care a fost in regula .sa fie facatura de tranzistor lam luat de la MIVAROM Link to comment
zvasile Posted December 10, 2009 Share Posted December 10, 2009 sa fie facatura de tranzistor lam luat de la MIVAROMDa.Am luat si eu 20 bucati si nu am putut folosi nici unul.Incearca cu un tranzistor din recuperari Link to comment
chanito Posted December 10, 2009 Share Posted December 10, 2009 daca are chopper rosu,schimba-l.de acolo e defectul. Link to comment
essu Posted December 10, 2009 Author Share Posted December 10, 2009 nu anteleg , cum rosu ?am pus o poza cu cioperuldar ceva ce ar merge an locul lui k2750, eu am niste IRF3205 de 110A Link to comment
tiby_1981 Posted December 10, 2009 Share Posted December 10, 2009 K2750 de la mivarom eu am luat 10 bucati toate proaste.se inacalzesc in 1-2 minute prajesti oua pe el... Link to comment
augustin Posted December 10, 2009 Share Posted December 10, 2009 K2750 datashet : echivalentul N MOSFET trebuie sa reziste la 600V si minim 4A..2SK1767, 2SK2044, 2SK2118, 2SK2144 Link to comment
chanito Posted December 10, 2009 Share Posted December 10, 2009 chopperul pare bun,nu e cel rosu.verifica toate piesele din sursa,schimbai toate diodele,vezi ca ai o rez ciudata peacolo care controleaza curentul,una de vataj mai mare de cateva sute de omi. Link to comment
tiby_1981 Posted December 10, 2009 Share Posted December 10, 2009 Poate pana intr-o jumatate de ohm aia regleaza curentul din cate stiu eu.. Link to comment
circiumaru Posted December 11, 2009 Share Posted December 11, 2009 IRF3205 e la 55v,ma mir ca nu ti-a sarit in ochi! Link to comment
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