Hammax PSU 13.8V Transformer

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  • 9w2tzw
    Member
    • May 2013
    • 14
    • Malaysia

    #1

    Hammax PSU 13.8V Transformer

    Hi,
    recently i got one Hammax 13.8V 30amps PSU which has its secondary transformer near filter capacitor blow.The problem its, the PSU didnt had any schematic available and the blowed transformer didnt had any identification for replacement.Could anyone help me with this problem? I had attached picture of the transformer below.





    Any helps are most welcomed.Thanks
    Learn a Little but Often,
    Practice Makes Perfect,
    Repetition is the Key of Success,
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: Hammax PSU 13.8V Transformer

    Is the yellow Mylar transformer wire wrapping show any sign of burn? It looks to me like there was some kind of conductor touched the two pins of the transformer and blown to pieces.
    Never stop learning
    Basic LCD TV and Monitor troubleshooting guides.
    http://www.badcaps.net/forum/showthr...956#post305956

    Voltage Regulator (LDO) testing:
    http://www.badcaps.net/forum/showthr...999#post300999

    Inverter testing using old CFL:
    http://www.badcaps.net/forum/showthr...er+testing+cfl

    Tear down pictures : Hit the ">" Show Albums and stories" on the left side
    http://s807.photobucket.com/user/budm/library/

    TV Factory reset codes listing:
    http://www.badcaps.net/forum/showthread.php?t=24809

    Comment

    • 9w2tzw
      Member
      • May 2013
      • 14
      • Malaysia

      #3
      Re: Hammax PSU 13.8V Transformer

      Originally posted by budm
      Is the yellow Mylar transformer wire wrapping show any sign of burn? It looks to me like there was some kind of conductor touched the two pins of the transformer and blown to pieces.
      yeah, i thought so....closer lookup, i found that the transformer wire itself had one of the wire shorted to other terminal.....since i could not get any schematic , transformer reference for replacement, is there any guide to replace it?? thanks.
      Learn a Little but Often,
      Practice Makes Perfect,
      Repetition is the Key of Success,

      Comment

      • budm
        Badcaps Legend
        • Feb 2010
        • 40746
        • USA

        #4
        Re: Hammax PSU 13.8V Transformer

        The transformer may be OK, you have to use the ringer tester to test the transformer. I can see that the magnetic wires wrapped to the posts/pins are still OK. Try cleaning off the carbon deposit so you can take good closed up pictures of those pins.
        Cabn we see the whole top side and the bottom side of the board?
        Last edited by budm; 09-19-2013, 10:09 PM.
        Never stop learning
        Basic LCD TV and Monitor troubleshooting guides.
        http://www.badcaps.net/forum/showthr...956#post305956

        Voltage Regulator (LDO) testing:
        http://www.badcaps.net/forum/showthr...999#post300999

        Inverter testing using old CFL:
        http://www.badcaps.net/forum/showthr...er+testing+cfl

        Tear down pictures : Hit the ">" Show Albums and stories" on the left side
        http://s807.photobucket.com/user/budm/library/

        TV Factory reset codes listing:
        http://www.badcaps.net/forum/showthread.php?t=24809

        Comment

        • ben7
          Capaholic
          • Jan 2011
          • 4059
          • USA

          #5
          Re: Hammax PSU 13.8V Transformer

          Doesn't look good ... probably the switching transistors' driving transformer. Test the switching transistors on the heatsink in your picture. (you can just barely see the heatsink and two transistors mounted on it)
          Muh-soggy-knee

          Comment

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