Hello friends. I have a board where I can’t remove the short at the M92. I have desoldered the chip and the cap and tested without the chip. Unfortunately, the short remains.
Where does this cap lead and what else could it be?
I also desoldered the BQ chip and the USB port to test.
I have a short on this cap in my switch. Does anyone have a link to a product page with that specific cap? I’m having trouble sorting through all the different capacitors that I’m seeing it might be.
That cap is off of the VDDIO pin, and goes directly to ground.
There’s a datasheet available for the BM92T30MW, which appears to be similar enough…
Looking at the Application example, and using other known values from posts from community members, the part values appear to match up.
My best estimate would be a 1µF 0402 6.3v cap.
Also, I found this, which states it may be a 1µF or 2.2µF 0402 6.3v cap.
Regarding the ‘short’ though, the side furthest from the m92 chip is connected directly to ground.
Thank you for the detailed answer. That’s the value I seemed to find as well. I tested the caps using continuity on my multimeter and that was the only cap that generated a tone. Are there any other tests I should be conducting to be certain about that cap being the bad one?
well, most cap goes to ground on one side, that’s what cap does in most time.
VDDIO/1.8v comes from MAX7760A/H. So A big warning for you to check around.
Very much appreciate the input from someone more knowledgeable, thank you. And yeah, while I make no claims of being an expert or even qualified, I figured that’s standard for capacitors unless they’re in series. I just wanted to point that out (probably un-necessarily) in case they were meaning that they were reading the one side shorted to ground, because… that’s expected. Sorry.
@TeKnoMonK
Regarding testing… this may be helpful? [hopefully links are okay? Just found a video covering this specifically]: https://www.youtube.com/watch?v=McszuMLHs2s
