LPG65-19UL6 - Troubleshooting Broken PSU of LG TV

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  • pi314314
    New Member
    • Jul 2024
    • 3
    • NL
    #1

    LPG65-19UL6 - Troubleshooting Broken PSU of LG TV

    Hello,

    After unplugging and plugging my TV it became broke. It is not turning on even standby LED is not litting. I checked power supply and I could not read 13V, PWR_ON or P-DIM(those are going to main board screenshot can be seen). I have checked bridge diode output 310ish DC. And I am reading same voltage on some capacitor as well. When I visually check and smell components I did not see any awkward thing. How can I proceed to trouble shot? And do you have schematic of this power supply by chance? I could not find in my web search.

    TV Mods: LG65NANO866NA

    PSU Model: LPG65-19UL6

    https://ibb.co/0y8Z4vB
    Last edited by pi314314; 07-27-2024, 12:16 PM.
    Tags: None
    • R_J
      Badcaps Legend
      • Jun 2012
      • 9535
      • Canada
      #2
      Check F101 fuse, is it open? Check all solder connections on the transformer
      Last edited by R_J; 07-27-2024, 06:10 PM.

        Comment

        • pi314314
          New Member
          • Jul 2024
          • 3
          • NL
          #3
          I could locate 2 fuses both of them are fine. I could not see any visual defect.
          Found that there is MBRF3060CT this component. I tried to test this component with continuity and all of the leg combinations are open circuit. I asked chat cpt, he told me that leg 1-3 there should be continuity.

            Comment

            • thommyX
              Senior Member
              • Apr 2016
              • 93
              • Germany
              #4
              PIN 1 and 3 can be low -resistance. These come from the transformer. PIN 2 is for the 13.2 volt on Connector P201. Renew the double diode.​

              LG Thomas

                Comment

                • pi314314
                  New Member
                  • Jul 2024
                  • 3
                  • NL
                  #5
                  Originally posted by thommyX
                  PIN 1 and 3 can be low -resistance. These come from the transformer. PIN 2 is for the 13.2 volt on Connector P201. Renew the double diode.

                  LG Thomas
                  You mean this right: MBRF3060CT​ ?

                    Comment

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