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tv samsung CZ-20F42T nu porneste sursa


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Buna ! Am un tv Samsung , sasiu ks1a , nu porneste sursa ,am inlocuit controlerul si cond. electrolitic , tot nu porneste ,tensiunea la pin 3 este  ~ 5 v , nu stiu ce sa-I mai fac , posibil sa fie prost chiar SPS controlerul cumparat ? Va rog , poate veniti cu o idee . Va multumesc !

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am verificat si chiar deconectat iesirile din chopper dar nimic , veridicat si deconectat diodele , nu simte nimic , am verificat in sursa rez. diode  pare ok , multumesc domnu dan cod pentru raspunsuri si timpul acordat 

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am schimbat si cond . , am luat alt controler si -nimic-, diodele par ok masurate in circuit , r803, r804 , lipsesc din circuit , la fel si optocuplorul -asa este facuta sursa de fabricant , ma dispera tv-ul asta ... va multumesc tuturor ....mai aveti vre-o idee  ?

pe cond. de filtraj am 310 v,este ok

iar la pin 3 controler  ~5 v

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Multumesc tuturor pentru interesul acordat . Stimate domn  "electronix 2006" aveti perfecta dreptate , am schimbat diode DZ 803 (27V) am pus un zener de 33 v si functioneaza ,va multumesc ,va doresc  numai bine si sanatate !

Edited by vali35
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