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[SOLVED]820-3476 - no green light

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  • [SOLVED]820-3476 - no green light

    Hi Guys,

    I dont have PP3V42_G3H on this board.
    Can u guys try help me figure out?

    Thank you

  • #2
    Do you have 16v coming to the input of the circuit at R7020?

    Is there a short to ground on PP3V43_G3H?

    Comment


    • #3
      Yes, I have 17v from R7020 (replaced)
      I check in u7090 a short to ground and i get 17.54kΩ


      Comment


      • #4
        Why are you measuring U7090, 3V42 comes from U6990.

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        • #5
          Duke, i can't find U6990

          Comment


          • #6
            Is this wrong u7100 creates pp3v42_g3h?
            Last edited by Aldizi; 06-09-2016, 07:41 PM.

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            • #7
              Oops was looking at wring diagram. Got voltage on pin 6 of U7090?

              Comment


              • menatwork
                menatwork commented
                Editing a comment
                U7090:
                pin 6 - 16.88v
                ​Pin 2 - 0.45v

            • #8
              U7090:
              pin 6 - 16.88v
              Pin 2 - 0.45v

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              • #9
                If there is no low resistance to GND on L7095 this looks like a dead U7090 to me.

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                • #10
                  L7095
                  Pin 2: 2.3V

                  Pin 2:17.95Ω

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                  • #11
                    Duke, I just replaced 7090 and still the same.

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                    • #12
                      larossmann , what you think about that?

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                      • #13
                        I check in u7090(pin 6) a short to ground and i get 9.82 kΩ

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                        • #14
                          L7095 pin 2, 17.95Ω??? if this reading is right you have a short.....

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                          • #15
                            aprendiz Yes, short to ground in L7095 Pin 2 i get 17.95 and sometimes 86.45 kΩ
                            Can u help me figure out, please?

                            Thank u
                            Last edited by menatwork; 06-10-2016, 04:17 PM.

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