I have been advised by Thierry Nouspikel and John Bindel that the voltages that were listed for the power pins were incorrect. Many thanks to them. There is no DC power at this point, only AC. I will see what I can dig up on the correct AC voltages.
Jason Rziha advises that the values on the back of the power supply that he has are:
18VAC, (22VA) between Pins 1&2, and 7.5VAC (1.0VA)between 2&4
It is unknown if these pin numbers correspond to the diagram above.
1 12V vid
2 R-Y (color burst clock)
3 Sound output
5 B-Y (external video input?)