Connect with us

ATX psu repair

Discussion in 'Troubleshooting and Repair' started by JohnBG, Feb 18, 2017.

  1. JohnBG

    JohnBG

    7
    2
    Feb 18, 2017
    hi, i am trying to repair old atx psu,and i need some help.
    it wont start, when i short green and red just clicks once.
    No fuses are blown, and nothing appears or smells burnt.
    checked 4 diodes, 2 big condesers, three primary transistors (13007), secondaru condensers(just bigger ones, marked blue), three diodes looked like transistors and all ok. there is 310v on primary condensers, and 5v on pin 9 is present. ic is AT2005
    what can i do next? thanks
    [​IMG]
    [​IMG]
     
  2. davenn

    davenn Moderator

    13,216
    1,732
    Sep 5, 2009
    green and red doesn't sound right

    usually green and black ... with green being the PWR_ON wire and black being 0V

    confirm that on your PSU pins that the green wire IS THE power on wire
     
  3. JohnBG

    JohnBG

    7
    2
    Feb 18, 2017
    green+black, i wrote wrong
     
  4. Bluejets

    Bluejets

    3,431
    695
    Oct 5, 2014
    Some also need the brown wire connected to the 3.3v line.
     
  5. JohnBG

    JohnBG

    7
    2
    Feb 18, 2017
    i was using it with green+black as power for led strips 12v, so i think that brown is not necessary
    also when connected to mobo, wont start pc
     
  6. davenn

    davenn Moderator

    13,216
    1,732
    Sep 5, 2009
    that's not right
    Green is a power on ... monitoring line ... it's not a power supply line
     
  7. JohnBG

    JohnBG

    7
    2
    Feb 18, 2017
    i wil have to learn english better. i used psu as power for led strips, black and yellow are 12v right? green and black shorted, brown was not in use.
     
    davenn likes this.
  8. Bluejets

    Bluejets

    3,431
    695
    Oct 5, 2014
    Sounds like you made a wrong connection and fried something in the power on section.
     
  9. JohnBG

    JohnBG

    7
    2
    Feb 18, 2017
    green+black to turn on, and yellow is 12v for led strip power, nothing is wrong
     
    davenn likes this.
Ask a Question
Want to reply to this thread or ask your own question?
You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.
Electronics Point Logo
Continue to site
Quote of the day

-