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ATX psu repair

Discussion in 'Repairing Electronics' started by JohnBG, Feb 18, 2017.

  1. JohnBG

    JohnBG New Member

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    hi, i am trying to repair old atx psu,and i need some help
    [​IMG]
    [​IMG]
    it wont start, when i short green and red just clicks once.
    checked 4 diodes, 2 big condesers, three primary transistors (13007), secondaru condensers(just bigger ones, marked blue), three diodes looked like transistors. tere is 310v on primary, and 5v on pin 9 is present. ic is AT2005
    what can i do next? thanks
     
  2. JohnBG

    JohnBG New Member

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    green+black, not red sorry
     
  3. Ramussons

    Ramussons Member

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    Try putting a minimum load of about 5 Amps on the 5 volt line. Some PSU's require a minimum load to run.
     
  4. dave

    Dave New Member

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  5. milospride

    milospride New Member

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  6. milospride

    milospride New Member

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    Hi,, am New to site, so am learning my around and couldn't find your response,, did the load o as prescribed work for you?
     
  7. JohnBG

    JohnBG New Member

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    no, same thing
     
  8. Little Ghostman

    Little Ghostman Well-Known Member Most Helpful Member

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    I cant zoom in enough, double check the areas I have arrowed for shorts. Its hard to tell from the pic you posted, but I can see possible shorts?? Could just be the pic, but worth a check, some atx need the stable wire connected as well, and a small load on all rails, normally the older types.

    Some just never work again.............

    screenshot-www.electro-tech-online.com-2017-03-01-18-35-40.png
     

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