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Thread: DM500 mort

  1. #1
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    Default DM500 mort

    Ieri mi-a facut o surpriza dm-ul, pe cand am ajuns acasa era oprit, cu ledurile stinse. Am masurat tensiunea scoasa de sursa si era 12v asa ca m-am gandit ca s-a defectat ceva in receiver, noroc ca mi-a venit ideea sa masor tensiunea in sarcina si am constatat ca deja la un curent de cativa zeci de mA, tensiunea scade la 4-5V.

    Deci am o sursa care in gol scoate 12V dar daca conectez ceva pe el, scade tensiunea sub 5V. Are rost sa incerc sa-l repar ? A mai intalnit cineva problema asta? Ca daca problema vine de la vreun condensator uscat, as putea sa-l repar dar daca e ceva mai complicat, nu ma chinui sa-l desfac.

  2. #2
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    Default

    Quote Originally Posted by bbox View Post
    Ieri mi-a facut o surpriza dm-ul, pe cand am ajuns acasa era oprit, cu ledurile stinse. Am masurat tensiunea scoasa de sursa si era 12v asa ca m-am gandit ca s-a defectat ceva in receiver, noroc ca mi-a venit ideea sa masor tensiunea in sarcina si am constatat ca deja la un curent de cativa zeci de mA, tensiunea scade la 4-5V.

    Deci am o sursa care in gol scoate 12V dar daca conectez ceva pe el, scade tensiunea sub 5V. Are rost sa incerc sa-l repar ? A mai intalnit cineva problema asta? Ca daca problema vine de la vreun condensator uscat, as putea sa-l repar dar daca e ceva mai complicat, nu ma chinui sa-l desfac.
    Daca ai timp si chef schimba-i condensatorii din primar si in secundar.Daca tot il desfaci fai niste lipituri si da-i citeva gauri in carcasa sa mai rasufle si el.90% din alimentatoarele swich au defectul asta.



  3. #3
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    Quote Originally Posted by gymi View Post
    Daca ai timp si chef schimba-i condensatorii din primar si in secundar.Daca tot il desfaci fai niste lipituri si da-i citeva gauri in carcasa sa mai rasufle si el.90% din alimentatoarele swich au defectul asta.
    mulumesc, asa voi face

 

 

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