haha, I like that. Without some sparks, It's not a good ending
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Gorflan
New Member
Last Activity: 02-03-2025, 08:32 AM
Joined: 08-13-2022
Location: Santiago
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
haha, I like that. Without some sparks, It's not a good ending...
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
Just wanted to update that I finally got my hot air station.
Desoldered the suspecting vrm and caps, and the short is still there.
Following the traces I couls see that theres no more components between this output and the backside of the CPU, so the short must be internal.
So I just wanted to say thanks to everyone that helped me in diagnosing the board.
This may be the end of the road for this board, but it was a huge learning experience, that was only possible with the help...Leave a comment:
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
Sweet camera that one!
Unfortunately i have to add it to a long list of desired expensive tools. I'm not a pro, just a guy that enjoys the pleasure of giving a second life to things others have discarded.
The mosfet is an IC that piernov helped to identify earlier in the tread. It's a dual mosfet with integrated controller, so I have no acces to the gates. Corresponding product code is SY8288RAC.
Measuring resistance between source and drain is all over the place. Constantly ramping,...Leave a comment:
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
I wish I had a thermal camera
I'm not very well equiped for this tipe of job. I have a soldering station, and a hot plate where i'm very succesfull at building things with smd components. Need to get a hot air station asap.
Tried a variety of usb power sources on the usb C plug, and the only one that caused some meaningfull power draw was a dumb 5v basic phone charger. In that condition, IPA evaporated quicker from the menctioned coil and mosfet IC.
Don't have a propper lab power supply,...Leave a comment:
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
There are 3 power phases feeding in to the cpu with 48ohm that must be Vcore
Another circuit with dual coils at 10ohm also feed it.
And the third power circuit in the area is the one shorted. Goes into an inner board plane
Attached is all coils readings and locations...Leave a comment:
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
Thanks!
That helped a lot. Theres no datasheet for this piece, but a I could see the pinout on the schematics linked
Now I understand what you are saying: PCH is integrated in the cpu, so it is quite possible the cpu is toast, and there's no problem on the caps or VRM?
How could I test that? Remove vrm parts, and if the short is still there, the problem is the PCH?...Leave a comment:
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Re: Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
Please help me identify it. I'm just learning this. I'm more used to desktop hardware; this laptop stuff looks very different.
I can't find any chip that look like a traditional PCH. is the ITE part? seems to be an input controller.
I don't know what this power circuit is suposed to feed. It's output seems to go to an inner plane of the board. The suspected IC is marked "AWSDPK"; google returns nothing. There's another one with the same markings feeding the memory. Seems to be...Leave a comment:
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Asus Zenbook Flip UX363EA killed by a cheap usbc power adapter
Hi all, First post here
Decided to up my game in electronics repair, and bought this dead notebook as learning material. The guy had already sold the screen assembly and ssd, I got the rest very cheap. Told me that he left it charging, and a power surge killed the non original USB C charger in use, and the note.
Schematics seem to be non existent, only sites I`ve found with reference to this model are just trying to serve me malware.
Been probing arround to reverse engineer the board, and made some progress:
- USB PD controller chip (TI TPS65994... -
Re: New Members - please post your introductions here
Hello from Chile,
Discovered this awsome comunity after i decided to start learning how to diagnose hardware failures. Been doing electronics stuff since a bunch of years, and being the default technical support for a lot of peope, I accumulatyed quite a nice pile of "practice material"Leave a comment:
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