Good days guys, I have a Macbook air M1 (820-02016-A) the fact is that when I connect it to the fuene the voltage ranges from 5 to 20 Volt and restarts again to 0 goes to 5 and 20 and so on, I have reviewed the values and the only one that gives me a little out of the ordinary is the PP1v25_S2 which should be 0.490 and is in 0.290 all others seem to be correct I have changed the usb C chip and I have programmed it and nothing remains the same, I need help
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Re: Voltaje range 5 to 20on Mabook air A2337 820-02016-A
PPBUS_AON steady voltage? -
Re: Voltaje range 5 to 20on Mabook air A2337 820-02016-A
Hello Good morning and thanks for replay, i star back again to work in this board because i have so mucho to do, i finally i find a short but is a 25 volt line and go direct to the M1 processor, the line is PP1V06_S2SW_DRAM, you can tell me it is possible to inject voltage to see what component is to groundComment
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Re: Voltaje range 5 to 20on Mabook air A2337 820-02016-A
Good Afternoon PPBUS_AON It is not stable, it varies from 6 to 12 to 19 and falls again and thus does the same cycle all the time.Comment
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Hi everyone,
I'm working on a MacBook Air 2020 (A2337, board 820-02016) and running into a strange USB-C issue. I've gone through quite a bit of testing and part replacement, but I'm stuck — hoping someone here can shed some light.
🛠 Original Issue
The machine initially wouldn't negotiate 20V over USB-C — stuck at 5V.
Diagnosis showed PP1V5_UPC0_LDO_CORE shorted to ground.
I replaced U3100 (UF400) using a donor board (A2179), and the machine powers on fine now.
⚠️ New Problem: One USB-C Port Only Works in One Orientation... -
Hey guys,
Hope you all are doing well. I come here from Win-Raid because I am having issues disabling Flash Protection Range Registers so I can flash my BIOS from within Windows using Intel's IFW tool/using flashrom within Linux, however I cannot due to the above mentioned error.
Here is my thread on Win-Raid detailing the whole process I went through: https://winraid.level1techs.com/t/re...h-gen/95478/27
Essentially I managed to boot into Windows while shorting PINs 1+5 of my audio chip to disable the HAP bit... -
Hey! As the title says. i don't know if this is the right place to ask but i need to get trusted USB C Controllers (CD3217-CD3215) For macs and dont know where to get them. i dont know if you guys know where is a good place to get it.
The thing is that i have a Macbook air A2337 M1 and i dont have a donnor board to get the CD3217. So i try the CD3217 from a A2141 Board and at first, whitout his eprom it does not convert 5v to 20v. then i put the original CD3217 eprom from the A2141 and then the macbook A2337 conver the 5v to 20v but still not turning on. i guess that the CD3217 is...09-06-2024, 12:06 PM -
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