palcu ion Posted July 11, 2009 Share Posted July 11, 2009 sursa tda 3640,proc sda 2010-a025,simptom initial:pornea fara inalta,afisaj ok,in sursa schimbati toti C,trafo linii schimbatam banuit driver tda8140,l-am schimbat,defectul a persistatla actionarea semireg frecventa sincro a pornit cu imagine cam1/2 din ecran iar dupa cateva min a iesit fum din deflexie;am schimbat-o iar acum nu se poate sincroniza H,am pus alt modul,la fel!nu am intalnit niciodata acest defect,poate stie cineva...multumesc Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 ca un amanunt,regland sr de frecventa linii,in apropierea punctului optim BO se blocheaza Link to comment
daisarqx Posted July 11, 2009 Share Posted July 11, 2009 ai masurat frecventa in baza?15625hz? Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 am specificat,cand ma apropii cu reglajul de 15625hz se blocheaza BO Link to comment
daisarqx Posted July 11, 2009 Share Posted July 11, 2009 verifica c521,d521,r521verifica r524,c522,r522 Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 o sa verific,dar parca n-ar avea legatura logica cu defectul........... Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 di pacate cele banuite de dv sunt ok,am si schema tv, mai trebuie ceva inspiratie Link to comment
Nonny149 Posted July 11, 2009 Share Posted July 11, 2009 Se blocheaza driverul sau sincro? Link to comment
Nonny149 Posted July 11, 2009 Share Posted July 11, 2009 Am pus tda 8143 cu modificarile necesare si-a mers normal. Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 tu ai avut 8140 def? Link to comment
Nonny149 Posted July 11, 2009 Share Posted July 11, 2009 Chiar din magazin am luat vreo cateva tepe! Aveam unu care continua sa comande tranzistorul si-n st-by,si-l incingea pana crapa. Link to comment
palcu ion Posted July 11, 2009 Author Share Posted July 11, 2009 problema e ca eu am 2 tda 8140 originale schimbate,2 trafo linii,2 module sincro,4 tda 3640,(doar sasiul al doilea este de nefolosit fiind spart)este imposibil sa fie toate defecte,totusi nu sincronizeaza H Link to comment
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