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palcu ion

grundig cuc3400

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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

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ca un amanunt,regland sr de frecventa linii,in apropierea punctului optim BO se blocheaza

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am specificat,cand ma apropii cu reglajul de 15625hz se blocheaza BO

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o sa verific,dar parca n-ar avea legatura logica cu defectul...........

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di pacate cele banuite de dv sunt ok,am si schema tv, :jytuiyu mai trebuie ceva inspiratie

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Chiar din magazin am luat vreo cateva tepe! Aveam unu care continua sa comande tranzistorul si-n st-by,si-l incingea pana crapa.

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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

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