Hey, I posted a week ago regarding this issue and was met with no response (I had some pins mislabeled). I have learned everything so far from this forum and have been able to fix a lot of switches thanks to you guys. Right now I’ve come into a problem where I have no shorts on power rails and my USB-C is good (bought the breakout bird @FXDX recommended). Seems as if the problem I have run into on 2-3 boards is no voltage on pin 6 and 18 of the M92 chip.
Also, separate question: what should I check on a board that is missing voltage on the 2 leftmost pins of battery receptacle? Thanks in advance
For pin 18: Please read my answer to your last topic:
Pin 6 is on a line to the pi3usb ic (mux ic for the datalines to the docking station) on the backside and a short on this line mostly indicates a bad pi3usb ic.
Thanks Calvin! I have a thread saved on the ENC IC and I will reference it for troubleshooting that. What about the two leftmost pins on the battery connector? I have a switch with those getting 0v on those battery pins but the USB-C is good and I’m getting 5V on the VBUS line.
So for this particular switch, I have been drawing 0.00A. I have swapped 3 M92 IC’s and still have 0V at Pin 6 and Pin 18. No shorts around M92, BQ, or P13. I also checked diode mode for power rails but those match your diagram, also continuity is good. I have 0V on the 2 Bat+ pins but diode checks are good, continuity checks are good and the BAT+ Pins are NOT grounded.
