Here is a basic image I have made to show you how to wire up a JAMMA board to a scart tv / monitor. This is how my supergun cable is wired and it is tried and tested on many different tvs. You might find that the 330R resistors are not required when using a crt tv but they are when using an lcd as the colours will be washed out without them.
You can get away with using +5v on pin 8 but depending on the tv it might display in widescreen, some tvs will not sync if there is no voltage on pin 8.
