Vizio V585-G1 Dead PSU

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  • triplefour
    Badcaps Legend
    • May 2014
    • 1747
    • USA
    #1

    Vizio V585-G1 Dead PSU

    just wanted to drop this here in the interest of cataloging possible common failures of any tv. and to post about them even when im not asking for help, for it may help someone in the future when searching this model. didn't see this model of TV represented here so here is my report:


    TV came in totally dead, no response. no standby LED.
    tested backlights were OK
    inspecting power supply: see no 5vsb
    see no voltages on cold side at all
    see no output from secondary of transformers, but voltage on primary input side.
    indicates DC voltage going to transformers, but not being switched, so no induction into secondary coils.
    visual inspection
    found blown resistor. tests short in circuit but tests open out of circuit.
    a transistor next to it shows all 3 legs shorted.


    R9111 blown open
    Q9100 all 3 legs shorted

    markings:
    AUK 39216
    SMK0965

    i wonder... can i replace this transistor with another similar one from a scrap board i have lying around? or is it critical that i order the exact part?
    hmm i guess i could use some help after all!

    the power supply for this tv i found on ebay for only 10$ so i went ahead and ordered it. but just for my own education, i will keep this dead board and try to fix it.
    Don't fear the repair...
    Tags: None
    • triplefour
      Badcaps Legend
      • May 2014
      • 1747
      • USA
      #2
      Re: Vizio V585-G1 Dead PSU

      pictures
      Attached Files
      Don't fear the repair...

        Comment

        • triplefour
          Badcaps Legend
          • May 2014
          • 1747
          • USA
          #3
          Re: Vizio V585-G1 Dead PSU

          update: U9103 (middle optocoupler) appears open on the LED side. should read a diode junction one way and open the other way, but reads open both ways.

          also diode D9104 is open. i lifted a leg to confirm this.

          so many bad components... definitely not worth repairing to save 10$

          but worth it to learn maybe!
          Don't fear the repair...

            Comment

            • nomoresonys
              Badcaps Legend
              • Jan 2013
              • 12145
              • U.S.
              #4
              Re: Vizio V585-G1 Dead PSU

              prolly find one on a scrap board, just try to make sure its close in specs. datasheet there: https://datasheetspdf.com/datasheet/SMK0965F.html

                Comment

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