Apple Macbook Air A2337 not charging

[Blunttag]

Re: Apple Macbook Air A2337 not charging

My Hot air station max out at 500c was not able to remove the mosfet

also borrow a 61W apple charger and the gate was 12V

what you mean by feed back loop (sorry if dumb question) and what is the current sense resistor? is it R5260

[Blunttag]

Re: Apple Macbook Air A2337 not charging

Not sure if i did it correctly but was not able to find a good location to check the resistance so i went with what was close
CHGR_CSO_FILT_P C5261 Pin 1 - R5262 pin 1 = 1.4 ohms
CHGR_CSO_FILT_N C5262 Pin 1 - R5261 Pin 1 = 1.4 ohms

[mon2]

Re: Apple Macbook Air A2337 not charging

These are good readings of the current loop circuit.

See attached.

What is the voltage of CHGR_AUX_DET with the adapter connected?

What is the voltage of this signal line when the adapter is removed ?

[Blunttag]

Re: Apple Macbook Air A2337 not charging

Hi

I assume the battery has to be connected to test this
Plugged in voltage around 4V +-0.5
not plugged in Voltage is 0.02V

Also the USB-C power meter arrive so i can check what it is drawing

[Blunttag]

Re: Apple Macbook Air A2337 not charging

Rechecked the voltages for CHGR_AUX_DET
adapter connected :5V
adapter Disconnected:0V

[Blunttag]

Re: Apple Macbook Air A2337 not charging

I end up returning the laptop to my cousin in a semi working state, I Like to thank mon2 for the help they provided in trying to diagnose the issue and hope that the diagnostic step in the thread help other people who have the same laptop and are having similar issues.

Thanks for the help and i really appreciate mon2 taking time to help with the issue.