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Toshiba 37AV502R PSU

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    #61
    Re: Toshiba 37AV502R PSU

    In talks with guy on craigslist to get 4- 40" inch Proscan's for $10 each. All bad boards of some sort. Wife gonna kill me.

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      #62
      Re: Toshiba 37AV502R PSU

      Originally posted by budm View Post
      Thanks for the follow up, glad to hear that it just the bad diode, it took me a long time to narrow it down to that D200.
      what does that D200 actually do in that circuit? If you don't mind explaining...
      Last edited by CapLeaker; 02-26-2015, 11:41 AM.

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        #63
        Re: Toshiba 37AV502R PSU

        Pin 3 of the IC is the Over voltage sensing pin, the bad diode has small leakage current and cause the IC to trip.
        That is why when d200 is removed, the circuit works fine (but without OV protection).
        Last edited by budm; 02-26-2015, 11:44 AM.
        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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          #64
          Re: Toshiba 37AV502R PSU

          Thanks for the explanation!

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