Hisense 75rge1 led output voltage

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  • Tech1212
    New Member
    • Apr 2023
    • 5
    • usa
    #1

    Hisense 75rge1 led output voltage

    This hisense is not putting out the 98 volts x 4 that its supposed to. Its putting out 35.1, 35.3,29 and 31 volts. I dont have capacitor tester. I do have a klien mm600 multimeter and a led tester.
    TIA
    All the leds appear to function.

    Can I get guidance on what components to test in regards to this low voltage issue ?
    Attached Files
    Last edited by Tech1212; 04-11-2023, 06:28 PM. Reason: Miss spelling
    Tags: None
    • Tech1212
      New Member
      • Apr 2023
      • 5
      • usa
      #2
      Re: Hisense 75rge1 led output voltage

      Today the voltages are even lower , about 17 volts x 4

        Comment

        • Tech1212
          New Member
          • Apr 2023
          • 5
          • usa
          #3
          Re: Hisense 75rge1 led output voltage

          Can any help me?

            Comment

            • petax
              Member
              • Dec 2022
              • 12
              • Sweden
              #4
              Re: Hisense 75rge1 led output voltage

              Originally posted by Tech1212
              Can any help me?
              It seems like the problem is on the power supply.

              With everything plugged in you could measure voltage between GND and B ON. Be careful with the power supply so you don't get an electric schock! I'm not 100 % sure but the B ON should be the control voltage from the main board to activate the backlight. If you don't have any voltage there I would suspect the problem is on the main board(if the main board is supplied with standby power). If there is a few volts at B ON the problem is probably on the power supply.

              You should also give us high resolution images of the boards

                Comment

                • R_J
                  Badcaps Legend
                  • Jun 2012
                  • 9535
                  • Canada
                  #5
                  Re: Hisense 75rge1 led output voltage

                  You likely have bad backlights, You can connect your meter to the backlight connector, then turn on the power and see if the voltage goes up, and then drops. This is due to the bad backlights and the power supply going into protection. (led boost voltage is shutting down)

                    Comment

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