I've been researching on how to modify my NTSC Snes cable for use on a PAL console. A few years back I've replaced the capacitors with 75 ohm resistors and thought that was good enough as I was getting a good picture. This is a third party RGB cable and after I compared it to the diagrams I've noticed it's not exactly the same. For some reason on the scart connector side I have PIN 4 connected (GND?) with a wire going to the Snes A/V and PIN 8 is connected to PIN 16 with a 180 ohm resistor, no wire. That works for NTSC since it's connected to +5v but the PAL diagram shows that PIN 8 needs to go to +12v Should I use the PIN 4 and rewire it to PIN3 on the multi out, but that will mean I won't have GND connected? I have very basic understanding but why isn't there a wire going to the multi out in the EvilTim's diagram, is it meant to get GND from the TV side? Thanks
This user had an issue with the shared ground that caused some audio interference. His cable has got only one ground like mine but it must be wired elsewhere on the scart (not PIN 4 since he's missing it) http://www.neo-geo.com/forums/showthread.php?255723-Guide-to-SNES-SCART-audio-grounding-quick-fix He decided to reuse the PIN 20 which is Composite Video (PIN 9 on the multi AV) and rewire it to PIN 4 on the SCART I guess I could do the same to separate the video and audio ground but looks like these cables are just poor quality and I should invest in something better. I could rewire the PIN 20 on the SCART side for sync on luma (PIN 7 on the multi AV?) What does a properly shielded and grounded cable look like?
I think PAL consoles used pin 3 on the multiout for force switching the TV to display From the SCART connector. Pin 3 in a NTSC console (depending on the console) used pin 3 for CSYNC. So it’s possible your cable on the multiout side is using pin 3 for sync, but your PAL console is not outputting sync on it. A shielded cable will have an outer braid that is soldered to ground on either end. There should be a separate ground run from multiout to the scart side. Look here at the cable pinouts: http://members.optusnet.com.au/eviltim/gamescart/gamescart.htm
