I have a Fastrack board that suddenly decided not to light the LED. Since it's a command version, I'd like to get it working again. All other functions work. I've traced it down to the control board, it has only about 1.3 volts to the LED, other switches have 2.9-3.0 volts and light the LED. The wiring and LED are good in the switch.
I'd like to find a schematic of the board to make it easier to track down what is happening so I can fix it. The board in question is: 691-TRC4-A00 Rev. 4.
I don't know if anyone has access to such a thing, other than Lionel. I'd love to get a copy if you do. 
My fallback position is to sky-wire track voltage through a diode and resistor to light the LED, but I'd like to do a proper fix if I could.
