Hi need help identifying this buck convertor pic attached i need pin out there's no output tia
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Re: msi meg x570 unify,identifying this buck convertor
Its a Monolithic Power IC https://www.badcaps.net/forum/showpo...85&postcount=3
NB503GQ-Z .There`s no datasheet available,you`ll find the pinout in the MSI MS-7B93 schematic https://www.badcaps.net/forum/showthread.php?p=1127510
.Last edited by SMDFlea; 04-22-2022, 12:14 PM. -
Re: msi meg x570 unify,identifying this buck convertor
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Hi,
it's a PoE camera and it stopped working. Using thermal image I identified failing component U22 marked as 16AF which seems to be buck convertor TI https://www.alldatasheet.net/datashe...62569DBVR.html. I took it out and It is inteed shorted on the output. However, after I took it out, the resistance between the output pads (on the board) still shows 190ohm, is that bit low?
Another issue is, seems to me I must be missing one of the tiny resistors R810 that should make up the voltage devider for the buck convertor. Honestly I did this months ago, I cannot...07-14-2025, 04:30 AM -
Hi folks,
I am trying to repair a Braun Silk Epil 9 series motherboard.
The on-board single cell Li-ion DCDC charger IC is defective.
It runs from 12V, and when it starts charging it brings my bench PSU CC.
I have drawn a reverse engineered symbol for it, does anyone could identify it?
I used up all my google fu with qfn16 li ion and dcdc keywords, but I have not found any pinout compatible one. Given the product's likely high volume production rate I also filtered LCSC's offering ot the 16 pin QFN DCDC and li-ion charger controllers, but no luck so far.... -
I watch this video
https://www.youtube.com/watch?v=Lh6YATitN9k
and wonder is possible on simple way to convert high dc voltage (over 60000v, low amps) into usable one, eg 12v dc, some amp? Circuit? -
Hello, I have an issue with the motherboard. Specifically, it doesn't power on, more precisely, the POST initialization doesn't occur.
Let me start from the beginning, the motherboard suddenly stopped working one day. There are no beep signals from the speaker, and the debug LEDs are not lighting up. After inspecting it under a microscope and using thermal imaging, I didn't find anything that could be damaged.
After that, I began voltage measurements, in which I noticed the absence of VDDQ, VDDP, VTT, and VPP lines. Later, I checked if there is an EN state on these lines,... -
Hello
I have a Gigabyte X570 Aorus Pro rev1.0 that doesn't work. I know the motherboard is at fault because the CPU, RAM and power supply have all been tested with a known good motherboard (including after trying them in the faulty board to check it hadn't killed them).
Thanks to some people on this website and elsewhere on the internet, I have a schematic and boardview for the WiFi version of this board, a schematic for the Elite version of this board (same board but cut down on features) and repair guides for other AM4 boards, one of which is for an Asus Tuf Gaming...
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