820-3476 no audio

[fas1]

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

[piernov]

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?

[fas1]

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?

pin 5 is ground, your correct to point that out, the resistance measured on PP4V5_AUDIO_ANALOG is 03.10.