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NEI E5 problema sursa?


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Salutare....am la reparat un nei cu sasiul e5....CTV322S proc, TDA8362 jungla, TDA3653 cadre, TDA4605 smps....tv in stby are toate tensiunile normale...insa la comanda on sursa incepe sa taraie si tensiunile scad...b+ 90V

 

Pe bec (60W) nu porneste deloc, insa daca pornesc fara bec si il cuplez, becul se aprinde, insa tensiunea este la fel si taraitul...posibil sa fie becul prea mare si sa nu fie sursa defecta...sa fie alt?

multumesc

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Conzii i-am schimbat preventiv, si TDA-ul...o ds verific rezistentele...revin, cu toate ca mi-au dat bine pe aparat (in circuit)....in gol sursa imi regleaza tensiunea...cand este in forta nu

 

Am verificat si rezistentele sunt ok, la fel si dioda de pe snuber....mentin becul legat pe B+....initial am gasit FET-ul ars....nu prea gasesc nimic prajit ....

Edited by catalin004
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sunt buni pe secundari....am ESR-metru si nu mi-a dat gresi niciodata...conzii sunt de foarte calitate, cumapar de la oradea....nici eu nu am avut probleme cu astfel de surse...insa nu-i dau de cap...nu prea vad ce ar mai fi defect....a mai ramas 4148.....nu sunt langa el, duminica sunt cam plecat.....la relax-peste...va dau maine seara de veste...

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