S301LA Schematic Request

[goodvibes]

I'm searching for a schematic for a S301LA board to make sense of all this...

I'm still working on an S301LA board where I thought that the problem was with the two A5KNA mosfets. (With some alcohol on them, you could see them thump repetitively.) After removing the 10k Ohm resistor, I supplied voltage/current with my own DC supply, connected after the mosfets to find what I thought was a bad cap, and burned up the charge management IC (PU8801). After ordering/replacing the IC, the chip fried again. However, this time power was supplied by the laptops own power supply. I thought this was very odd considering I hadn't put the 10k Ohm resistor back on the board...

Your experienced help would also be great, but I'll start a new thread for that in the appropriate place.

Thank you!

[peste]

Re: S301LA Schematic Request

maybe that helps...

https://www.badcaps.net/forum/showthread.php?t=54934

[SMDFlea]

Re: S301LA Schematic Request

Post #67 https://www.badcaps.net/forum/showth...t=54934&page=4

[goodvibes]

Re: S301LA Schematic Request

Unless I'm mistaken, the archive file in that post has only the boardview file and not a schematic with it. I've read through that string to help troubleshoot, but still having a hard time.

[SMDFlea]

Re: S301LA Schematic Request

There`s no schematic available,only boardviews .

[goodvibes]

Re: S301LA Schematic Request

I just solved the board issue. Turns out that cap PC8802 near the power-input MOSFETs was indeed bad. What's interesting is that this cap, (and many others), were initially tested for a short-to-ground using Diode Mode on my multimeter and didn't trigger. After changing the Charge Management IC (PU8801) and watching it 'splode, I rechecked caps using Resistance Mode and saw that it had a crazy low resistance indicating a failure. Changed both IC and capacitor and the board came back to life. Thanks for pointing me at some options to help, though.