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Guest dobricacosmin

Defect ciudat Philips Gr-1ax

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Guest dobricacosmin

Am primit un philips model 14gr 1021/16b sasiu gr1ax .Initial tv avea un contact imperfect.Posesorul tv a incercat sa gaseasca contactul si a facut scurt(cu radiatorul) pe terminalul rez 3616.Am schimbat rez 3616 si 3680,mosfetul din sursa Buk 444 si dioda 6610.In rest toate componentele din sursa par ok.Am scos un capat al bobinei 5660 de pe bara de 95 de v si am pus o sarcina artificiala de 60w.(am inteles k aceasta sursa nu pleaca in sarcina si am pornit-o initial in gol,dupa care am cuplat becul).Am masurat tensiunea de 95 de v si e doar 4-5v.Cand decuplez sarcina artif ea creste pt 1 sec la 95 de v si apoi scade la 40v.Mentionez k tv are la pornire si un tiut in difuzor.

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Am avut nu unu,doua de astea cu problema de alimentare,unul era al unuia de la Protectia stiti voi cui.Nu porneau nici sa le omori,desi am schimbat TOOT,PIESA CU PIESA,INCLUSIV CHOPPER :smt013 Si e o schema asa de simpla,da e facuta de Philips :finga: Daca tzii cont de ce am patzit eu, s ar putea sa castigi o luna din viatza(atat am pierdut eu adunand orele pierdute). Sper totusi sa il faci si sa ne spui si noua ce a avut.Bafta,Radu

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Guest dobricacosmin

S-a rezolvat problema!!!!In sfarsit!!!Dc ii dadeam o tensiune de 4v dupa dioda D6635 pornea.Am schimbat dioda cu alta si a pornit.Destul de suspicios caci dioda scoasa din montaj si masurata dadea bine...dar....Multumesc celor care au incercat sa ma ajute!!!!!!!!!!

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