I was in the process of doing a switch-a-roo swapping a PS3 and PS1 board between locos, with the intent of upgrading my old PS1 and then selling the PS3 donor as a functional PS1.
Prior to starting the project, all features of both engines checked out clean and functional, including the PS1 couplers when switched to either front or back.
I got all the way through the swap (including moving couplers, adding resistors to PS3 LED lights, etc) and was pretty successful, but while testing the newly downgraded PS1 without the shell, one of my wire nuts on the track ground side let loose and the ground wire from one of the couplers worked it's way under the loco and make a nice spark show against the center rail.
I feared the worst, but everything seemed OK and everything still functioned... Except the couplers.
I tried using both independently but neither will fire now. I'm guessing that the 12 or so VAC coming through the coil back to the board via the coupler 4-pin harness didn't do anything good for the coupler circuit . The spark show only lasted maybe a second, but probably long enough?
Anything I could check (that big capacitor? FET?) or just bite the bullet and pull the board and put in a different PS1? Nothing looks visibly damaged on the board, but hard to tell.
Thanks
