Vizio E60-c3 led driver problem

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  • mcross
    Badcaps Veteran
    • Sep 2011
    • 201
    • USA
    #1

    Vizio E60-c3 led driver problem

    Hi alll.
    I have a Vizio E60-c3 . The driver section is bad. built in to the main board. All works but the backlight., I only get 25v + coming out of driver section, need 32v. I tested the led strips with a ext. ps. My question is can i use a regulator to step the 25v to 32v? possible?
    Thanks
    Mike
    Attached Files
    Tags: None
    • budm
      Badcaps Legend
      • Feb 2010
      • 40746
      • USA
      #2
      Re: Vizio E60-c3 led driver problem

      I do not see any boost converter circuit on the main board to boost the incoming 24VDC to 32VDC.
      You can look up the spec sheet of the LED controller IC U4000 to see the application circuit to see how it works.
      So far it looks like it has 12 LED drivers for 12 LED strings for zone control driving of the LED strings, have to be verified by the spec of the IC.
      Pictures provided by shopjimmy.
      Attached Files
      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

        • mcross
          Badcaps Veteran
          • Sep 2011
          • 201
          • USA
          #3
          Re: Vizio E60-c3 led driver problem

          Thanks Budm,, will look at it again today and let you know what i find
          Mike

            Comment

            • nwcs
              Badcaps Veteran
              • Dec 2015
              • 311
              • usa
              #4
              Re: Vizio E60-c3 led driver problem

              Did we ever get an answer to this problem. I have the same issue and I really do not want to remove the panel if it is for sure a bad power supply. Mine puts out 24V to the led's and I have not been able to find a spec sheet to see if U400 will boost to 32v.

                Comment

                • nwcs
                  Badcaps Veteran
                  • Dec 2015
                  • 311
                  • usa
                  #5
                  Re: Vizio E60-c3 led driver problem

                  I took the panel off and found that there are several LED's that are bad and one shorted led on one strip.

                    Comment

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