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Samsung KS1A


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Am acest tv cu urmatorul defect: nu se aprinde led-ul este inchis. Am desfacut tv si in primar am 320v pe c801, pe pin 1 5q0765 am 320v pe pin 3 am 6v si pe restu 0v. In secundar nu am nici o tensiune.

Ce nu inteleg eu cum se face stand-by pt ca nu are optocuplor pe placa si nici nu pare ca l-ar fi avut. In tv a mai fost umblat.

Proprietarul zice ca mai facea figuri cand se aprindea cand nu...

Nu am mai lucrat pe acest sasiu, ma puteti lamuri?

Edited by clony
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Mi-a revenit acest tv cu aceiasi manifestare. Proprietarul a zis ca, cand a aprins becul in casa s-a stins tv.

L-am desfacut si am gasit cr409(561k/2kv ) din colectorul final lini in scurt si l-am inlocuit cu 471k/2kv(comform schemei). Acum porneste dar nu am imagine, are ecran alb cu linii de intoarcere, pe colector final lini am 118v. Am umblat la potentiometrele de pe traf dar tot nu apara imagine.

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Edited by clony
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Inainte de a schimba cr409 am umblat la potentiometrele de pe traful de linii. Dupa ce am citit mai multe posturi pe forum  am reglat screen-ul mai finut si problema s-a rezolvat,a aparut rastrul si OSD. Cand am masurat 178 pe pini 7 8 9 pe aparat imi arata ceva de genu 1.78.0 cred ca era o eroare de la aparat si am interpretato eu gresit.. problema rezolvata, multumesc!!

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