Announcement

Collapse
No announcement yet.

PSU AT Delta DPS-200-PB-8 half voltage.

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

    PSU AT Delta DPS-200-PB-8 half voltage.

    HI!.

    I want to repair this AT PSU.
    Sometimes it works well for a few minutes. Other times it does not start well.
    When it fails, the voltages fall almost in half.
    + 12v -> +5,5v
    + 5V -> +2.8v
    When it fails, the PG goes crazy and falls to 0V.
    I was already measuring the capacitors and they seem to be all right.
    Any suggestions that may be failing?

    Greetings and thanks.

    #2
    Re: PSU AT Delta DPS-200-PB-8 half voltage.

    I would replace any small electrolytic caps in the primary (0.47-47µf around 50V), I don't know how you measured the caps but those usually cause problems and are over looked.
    Last edited by R_J; 07-17-2018, 11:02 AM.

    Comment


      #3
      Re: PSU AT Delta DPS-200-PB-8 half voltage.

      sounds like a problem I ran before on a different PSU. There was a small cap near a heat sink that was bad in the feedback circuit.

      Comment


        #4
        Re: PSU AT Delta DPS-200-PB-8 half voltage.

        Hi.

        Thanks for answering. This weekend I am going to change the small capacitors of the primary.
        Attached image of the power source.

        Greetings.
        Attached Files

        Comment


          #5
          Re: PSU AT Delta DPS-200-PB-8 half voltage.

          Check the small caps in the secondary too. The feedback starts at the secondary.

          Comment


            #6
            Re: PSU AT Delta DPS-200-PB-8 half voltage.

            Hello!

            Change all the electrolytic and the problem persists.
            Any other component to check? what do you think?

            regards
            Last edited by Franchute13; 07-19-2018, 06:15 PM.

            Comment

            Working...
            X