creating s video connection off tv main board
 

I'm guessing it's possible to create an s video connection within a
normal tv?

I have a small Zenith System 3 TV (model sd1327w) which only has a
coaxial input that I want to try this on.

I've been looking for the schematics and can't find them. It's seems
like there used to be free schematic listings all over the net at one
time, now everything is pay.

Thanks