Quoted from EMsInKC:
Just a note on the differences in wire colors.
Gottlieb didn't run out of wire. They used single color wire, the cream colored wire you see most of the time, and had a machine with Sharpie like pens that put the traces on there.
Lots of times, there will be a wire color on the schematic, then something like this (300) after it indicating a wire change. If you check those numbers against the chart on the schematic, you'll see that those numbers most of the time correspond to the correct wire color.
I tell you what. I'm currently working on 3 Joker Pokers at once. I got the first one up and running, then I was re-pinning the second PF. Some prior idiot had soldered the wires to the driver board. To put the wires back in the connector, I referenced BOTH the other PF and the manual. When I was done, I had one wire that didn't match. After doing a little sloothing with my DMM, I determined that this was the wire for all the standup switches. Green in two out of three of my PFs. Green in the manual. White with some stripes on this PF.