How do I test this power IC?

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  • mattpd
    Badcaps Veteran
    • Oct 2012
    • 301
    • USA

    #1

    How do I test this power IC?

    I am trying to repair a SMPS and have checked almost every other components except the power IC because I don't know how... Any tips?

    https://cdn.badcaps-static.com/pdfs/...003d10a613.pdf

    Also, this part:

    https://cdn.badcaps-static.com/pdfs/...391078abcb.pdf

    is on the secondary side. Should I test it too? How?
  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #2
    Re: How do I test this power IC?

    You can do static Ohm test on the SMPS IC to see if it has an internal short which is all you can do.
    Check pin 7 (GATE drive) and pin 6 Ground
    Pin 7 and pin 8 VCC
    pin 1, 2, 3, 4, 5 and the pin 6 Ground to see if any obne of these pins are shorted to ground.
    By the way, make and model of the unit you are workig on?
    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

    • mattpd
      Badcaps Veteran
      • Oct 2012
      • 301
      • USA

      #3
      Re: How do I test this power IC?

      Th42pd5u Panasonic plasma. Also right after I posted that I found a bad diode. D504 if my memory serves me right. I don't have the board in front of me now.

      Can I check the power ic in a similar fashion?
      Last edited by mattpd; 10-23-2012, 03:29 PM.

      Comment

      • mattpd
        Badcaps Veteran
        • Oct 2012
        • 301
        • USA

        #4
        Re: How do I test this power IC?

        Sorry its Th42pd50u

        Comment

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