2A265 Vcc and Gnd shorted

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  • squeeish
    Member
    • Apr 2011
    • 15
    #1

    2A265 Vcc and Gnd shorted

    Hi guys,

    I have limited electronics knowledge, but I'd like to find out what's going on with this power supply I'm fixing for a DVD player as a hobby.

    Here is the board in question:





    The biggest capacitor there is 400V 22uF, receiving about 300V just fine. It's newly replaced too, as well as the small 47uF 50V capacitor next to it because of the black spot on the board there.

    The 2A265 IC isn't receiving Vcc (pin 7), and it seems to be shorted to Gnd(pin 8). For the life of me I can't figure out why as the components connected to it all seem to be in good order when I measured them.

    Can someone give me hints to what to do next?
    Attached Files
    Last edited by Per Hansson; 10-30-2016, 04:40 AM. Reason: Offsite images uploaded
    Tags: None
    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8126
      • Canada
      #2
      Re: 2A265 Vcc and Gnd shorted

      Is that diode shorted on the bottom of the PWM?

        Comment

        • squeeish
          Member
          • Apr 2011
          • 15
          #3
          Re: 2A265 Vcc and Gnd shorted

          Originally posted by CapLeaker
          Is that diode shorted on the bottom of the PWM?
          The little red one marked D15? The 2A265 IC is the one marked U804.

            Comment

            • budm
              Badcaps Legend
              • Feb 2010
              • 40746
              • USA
              #4
              Re: 2A265 Vcc and Gnd shorted

              That D15 looks to be Zener diode, so check and see if the Cathode is connected to the Vcc pin of the IC or not, if it is then lift one end of the diode off the board and then check the resistance between Vcc and Gnd again to see if it still show very resistance or not.
              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

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