What is the exact voltage to ground of PPBUS_AON @ white fuse F5200?
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Pin 1, 12.2V unstable.
Pin 2, 12.2V unstable.
F5200 = 0.2ohms
Diode Pin 1 = 0.487
Diode Pin 2 = 0.490Comment
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Can you define unstable? How bad are the fluctuations?
Suggest to flux and remove the white fuse @ F5200. Then measure the voltage to ground again at F5200, pin #1. Is it stable? What is the voltage?
What is the voltage of 3V8_AON (measure @ C5895)?
reference:
https://boards.rossmanngroup.com/thr...0-02016.65022/Comment
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Okay.
I'll do that tomorrow morning.
In the meantime, thank you very much for your help.Comment
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F5200 retired
Pin 1 = 12.26V - Diode 0.520
Pin 2 = 0.215V - Diode 0.480
C5995 (PP3V8_AON_VDDMAIN)
Diode 0.340
Volt 3.8Comment
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Remove all power.
What is the resistance to ground of pin #2 on the pcb pad for the removed fuse F5200?Comment
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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 -
Hello all,
I am repairing a Macbook A2337 and i have a problem
The Macbook is stuck in restore as someone before me tried a DFU restore and bricked the device, now i can't do a restore as AC2 throws error 1 which is related to the trackpad.
When i turn on the device i get the trackpad click for a few moments and then nothing, i tried 7 trackpads and 7 trackpad flats, i know all 7 are functioning okay, especially one as i use it for testing and DFU restore.
I inspected the whole board and everything seems fine.
Can anyone help me as i didn't fiddle with trackpad... -
Hey,
I'm working on a MacBook Air M1. I'm pretty sure the U8100 is not working correctly. But I never had to change it before, so I wanna ask anyone of you guys to confirm (or not confirm) my thoughts on it.
USB Tester: 5V / 0,00A
PPBUS_AON: 12,3 V
PP5v_S2: 0 V no short
PP3v3_S2_UPC: 0 V no short
PP1v25_S2: 0 V no short
PPDCIN_AON_CHGR_R: 5 V
no enable signals for the S2 rails by the U8100
both CR3217 (UF400, UF500), are supplied by 5V (Fuses FF200 and FF201)
PP3v3_UPC0_LDO: 0 V, 0,5V diode mode to gnd
PP1v5_UPC0_LDO_CORE:... -
Hello, a friend give me this M1 Mac Air, he said that it simply stop working. Apple preventive is replacing motherboard.
Model is MacBook Air M1 A2337, logic 820-02016, not booting, and taking 5V 0.42A and consuming 2.173W.
Once disassembled is very clean, no water damage at all. Visual ispection reveal no visible problem. Flir camera point to two hot point:
C81DC PP3V8_AON_VDDMAIN
And
Q5800
What should I test as next step?
Thank you very much! -
Hello! I need help, the MacBook could not boot and rebooted! After examination, I found that the small sound board with a 3.5 mm jack was oxidized! I replaced it and the MacBook no longer boots. Consumption with a battery 20v / 0.000A, without a battery 5v / 0.120-0.470A (not stable). The MacBook is not in DFU!
Comment