Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

[dicorato]

Hi,

I'm trying to diagnose this a1466 board, I'm pretty new with this, but I checked the signals up until PM_SLP_S5_L, which is at 3.1v. Is it a valid level for this signal?

[mon2]

Re: Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

https://logi.wiki/index.php/User:Pie...sing_SLP_S5.23

[mon2]

Re: Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

https://www.it-tech.com.au/mac-q-a/p...-l-timing/amp/

Remove all power. Measure the resistance to ground of the 3v3 rail used as the pull up. If the rail is not 3v3 then check its resistance to ground to see if it is under excessive load.

[dicorato]

Re: Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

I measured PP3v3_S5 is at 3.3v. Resistance to ground is at 55 ohm.

[mon2]

Re: Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

That is a low resistance. Be sure there is no power to the board during the resistance check.

What is the 820-**** number of your logic board?

[dicorato]

Re: Macbook air 2015 - A1466 - PM_SLP_S5_L is 3.1v good?

No power connected during the resistance test. 820-00165-A

[dicorato]

Any idea what to check next? Check ICs on the 3v3 rail by removing them?

[mon2]

PM_SLP_S4_L = 0v9 which is considered a logic LOW. This signal should be a logic high = ~3v3 if all is well.

Review the same webpage and go through the 11+1 sequence of checks:

https://www.it-tech.com.au/mac-q-a/p...-l-timing/amp/