macbook pro 820-3115

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  • judamex
    Active Member
    • Jan 2021
    • 183
    • Mexico

    #21
    Re: macbook pro 820-3115

    Originally posted by mon2
    Is this line pulsing between the 2 voltage values ?
    Value voltage pin #2 16.7V pin#3 16.7V pin 1# 0V

    Measurement pin#2 43K and UP pin#3 365K pin#1 1.4M

    Comment

    • mon2
      Badcaps Legend
      • Dec 2019
      • 14046
      • Canada

      #22
      Re: macbook pro 820-3115

      Value voltage pin #2 16.7V pin#3 16.7V pin 1# 0V
      Which part are you measuring for these values ?

      Is it Q7030 ? If yes, this part has pins 1-2-3 connected together.
      Attached Files

      Comment

      • judamex
        Active Member
        • Jan 2021
        • 183
        • Mexico

        #23
        Re: macbook pro 820-3115

        Originally posted by mon2
        Which part are you measuring for these values ?

        Is it Q7030 ? If yes, this part has pins 1-2-3 connected together.

        sorry I measured D6990, this value are from D6990 pin #1,2,3.

        Comment

        • mon2
          Badcaps Legend
          • Dec 2019
          • 14046
          • Canada

          #24
          Re: macbook pro 820-3115

          What are the voltage readings on the replaced mosfet @ Q7030 ?

          Pin 5-6-7-8 (Drain)
          pin 4 (gate)
          pins 1-2-3 (Source)

          Comment

          • judamex
            Active Member
            • Jan 2021
            • 183
            • Mexico

            #25
            Re: macbook pro 820-3115

            Originally posted by mon2
            What are the voltage readings on the replaced mosfet @ Q7030 ?

            Pin 5-6-7-8 (Drain)
            pin 4 (gate)
            pins 1-2-3 (Source)
            Same voltage

            Pin 5-6-7-8 (Drain) 16.7V
            pin 4 (gate) 4.6V
            pins 1-2-3 (Source) 3.4V

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14046
              • Canada

              #26
              Re: macbook pro 820-3115

              Remove all power. Meter in DIODE mode. Fuse F7040 remains off the board.

              Test ppbus_g3h line in diode mode.

              You should get 0.400-500 at L7030, with red probe on ground; OL with black on ground.

              Comment

              • judamex
                Active Member
                • Jan 2021
                • 183
                • Mexico

                #27
                Re: macbook pro 820-3115

                Originally posted by mon2
                Remove all power. Meter in DIODE mode. Fuse F7040 remains off the board.

                Test ppbus_g3h line in diode mode.

                You should get 0.400-500 at L7030, with red probe on ground; OL with black on ground.
                Meter in diode mode red on GND. Black on points

                L7030 0.501

                PPBUS_G3H .481 i test all points on the board
                Last edited by judamex; 08-31-2022, 03:14 PM.

                Comment

                • mon2
                  Badcaps Legend
                  • Dec 2019
                  • 14046
                  • Canada

                  #28
                  Re: macbook pro 820-3115

                  Now reverse the meter leads and measure the readings on L7030. Still in DIODE mode and no power.

                  Comment

                  • judamex
                    Active Member
                    • Jan 2021
                    • 183
                    • Mexico

                    #29
                    Re: macbook pro 820-3115

                    Originally posted by mon2
                    Now reverse the meter leads and measure the readings on L7030. Still in DIODE mode and no power.
                    Meter on Diode mode measurement red on L7030 pin#1,2 0.0L (No conection)
                    Last edited by judamex; 08-31-2022, 04:35 PM.

                    Comment

                    • mon2
                      Badcaps Legend
                      • Dec 2019
                      • 14046
                      • Canada

                      #30
                      Re: macbook pro 820-3115

                      Check / Replace R/C7025.
                      Check all traces and solder connections around U7000.

                      Comment

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