I am trying to repair this V1 and it seems someone has already tried the same, the usb-c was replaced but each pin is solid and reads 2.4 volts. They only soldered one anchor I guess to just do a quick test. The diode above it reads the same 2.4.
I’ve already the replaced the M92, there were no shorts nearby just wanted to try. Still no shorts. No changes.
No noticeable shorts near BQ chip.
No shorts near Pi3u chip.
No shorts near Alc5 chip.
Does anyone have any troubleshooting steps for me, that would be greatly appreciated.
I checked the CC2 pin for m92, I get 0L. The 3 vertical capacitors above it are the same but not short. The pins look fine but maybe I’ll go thru and touch them again.
PROGRESS: I reflowed the M92 chip, I know what I did wrong last time, and am now reading .478 on CC2. While reflowing I moved the resistor top-right to the M92 and am worried if it got too hot putting it back on. It got stuck to the solder tip for several seconds, 7-8?
The resistor looks fine but I can’t get a diode reading through it, like one probe on top and bottom it doesn’t read anything or measuring to ground, attached back in place.
So I went looking around and a lot of resistors give odd readings according to the diagram. And they didn’t get hot at all.
The one next to it (so still the 2 resistors top right of M92, directly above pins that read 571) the one on the right only reads .48 on the bottom but not the top, testing diode mode to ground.
And the group of 3 resistors and 1 capacitor in a vertical row to the top-left of M92, the two top resistors are only showing 0.34 and 1.34 on the right side and nothing on the left. Is this normal? The diagram shows different readings. But this is still progress.
(I would post screenshot if I could.)
That was cool, but my Switch is HAC CPU 20, so there are some differences. I have a donor board that I think I can salvage instead of waiting or buying. But I’m going to buy them by the truck-load if I can. When I’m certain which ones they are.
I replaced a series of resistors and caps. The resistor I highlighted I wasn’t sure on its resistance so I used a 100k, would that work? So now these two pads are low, but the yellow one from earlier is now at normal levels.
This resistor on the left is on its side I know, short on both ends. And the one I replaced top right doesn’t beep on any ends.
The major issue I have working on this board, is that the last person who worked on this left a bunch of flux everywhere that has been caked into it. I can solder a capacitor onto a board in 20 seconds easy. But on this one it’s just so dirty the flux becomes glue in about 5 seconds and nothing wants to stay soldered on the pads. =( I spend a hour working on one resistor. The flux actually holds it in place which isn’t good lol. I’ve wiped the whole thing down, isopropyl alcohol, hit the board with hot air and all the flux sizzles, then I clean. But it’s just SOOOO dirty! One of the most frustrating things is when something so basic such as soldering, becomes a hassle and wastes so much time. Nothing else I’ve soldered has been this hard or makes me feel incompetent about something so simple.
