here's the direct link to the schematic, does it work for you?
http://vintagepc.site50.net/site/fle.../TV_SCHEMA.png
I'm refraining from embedding them because they're quite high-res files.
I took a closer look at the socket and I saw it is indeed wired to pin 5 with a resistor. They used pin 6 as a tiedown point and the resistor was hidden in the mess of stuff coming off it.