820-3476 no audio

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  • fas1
    New Member
    • Apr 2011
    • 4
    #1

    820-3476 no audio

    hi everyone, need some assistance, new to macbook logic board repair, ive got an 820-3476 logic board, im not getting any audio output from headphones or speakers, bluetooth headphone work fine.

    ive got the logic board out, been checking around the u6200 area, as i understand it pin 1 should be 4.5v but it isnt nowhere near. checked pin 5 thats 5v and so is pin 4.

    i did change u6200 but still getting the same readings...

    also where on the board is xw6201??

    any help would be appreciated

    thanks in advance
    faz
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: 820-3476 no audio

      Pin 5 of U6200 is ground so double check your pinout. You can also measure resistance to ground on PP4V5_AUDIO_ANALOG to confirm there is no short to ground on U6200 output.

      Is there a red light inside the audio jack? Does the audio preferences show digital output?
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • fas1
          New Member
          • Apr 2011
          • 4
          #3
          Re: 820-3476 no audio

          Originally posted by piernov
          Pin 5 of U6200 is ground so double check your pinout. You can also measure resistance to ground on PP4V5_AUDIO_ANALOG to confirm there is no short to ground on U6200 output.

          Is there a red light inside the audio jack? Does the audio preferences show digital output?
          pin 5 is ground, your correct to point that out, the resistance measured on PP4V5_AUDIO_ANALOG is 03.10.

            Comment

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