Sanyo dp50740 will turn on and off but no picture

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  • ricosavy
    Badcaps Veteran
    • Jul 2012
    • 457
    • united states
    #1

    Sanyo dp50740 will turn on and off but no picture

    The plasma tv when i plug it in and hit power button i see a quick flash of white light on screen like it is trying to turn on but it does not.I also checked the main board check points i got all of them except for the 13 v test point but i dont see a circuit that would provide for 13v unless i am wrong.also on pin 48 i get 4.7 v it is higher than 3.3v for power fail circuit.

    Here are my regulator voltages

    Ic6630
    Pin1 .570
    Pin2. 1.821
    Pin2. 3.302

    Ic6650
    Pin1. 2.097
    Pin2. 3.349
    Pin3. 5.042


    Ic1660
    Pin1. 7.824
    Pin2. 9.072
    Pin3. 11.955


    All lm11175 adj voltage regulator


    Any help would be apprecaited
    Tags: None
    • ricosavy
      Badcaps Veteran
      • Jul 2012
      • 457
      • united states
      #2
      Re: Sanyo dp50740 will turn on and off but no picture

      I also noticed the sc green light is on it is bright green it only turns off. When set shuts off i assume if had short it would not light up.

        Comment

        • ricosavy
          Badcaps Veteran
          • Jul 2012
          • 457
          • united states
          #3
          Re: Sanyo dp50740 will turn on and off but no picture

          Here some pictures
          Attached Files

            Comment

            • ricosavy
              Badcaps Veteran
              • Jul 2012
              • 457
              • united states
              #4
              Re: Sanyo dp50740 will turn on and off but no picture

              Pic
              Attached Files

                Comment

                • ricosavy
                  Badcaps Veteran
                  • Jul 2012
                  • 457
                  • united states
                  #5
                  Re: Sanyo dp50740 will turn on and off but no picture

                  Sc board green light
                  Attached Files

                    Comment

                    • ricosavy
                      Badcaps Veteran
                      • Jul 2012
                      • 457
                      • united states
                      #6
                      Re: Sanyo dp50740 will turn on and off but no picture

                      AMS1117-ADJ will this regulator work for replacement for 1117s adj 009

                        Comment

                        • ricosavy
                          Badcaps Veteran
                          • Jul 2012
                          • 457
                          • united states
                          #7
                          Re: Sanyo dp50740 will turn on and off but no picture

                          Replaced my regulators on main board still same problem any help what to check next

                            Comment

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