FWIW, modded TVs often do choke on TTL level sync. I've never damaged anything with it, but the few times I've accidentally hooked up my Saturn without a resistor on the sync line the TV wouldn't display the image properly. If they left out the 470 ohm resistor it's likely to not to have worked even if your Saturn was OK.KPackratt2k wrote:Is anyone else having issues getting Sega Saturn CSYNC cables to work on RGB modded consumer TVs? I bought a Sega Saturn RGB SCART CSYNC cable from Retro Access and I'm getting a rolling picture. I've tried replacing the single resistor on the connector board with a 470R just in case that was it and I'm still not getting sync. I don't understand why CSYNC from the Saturn doesn't work because CSYNC from any other console works fine on every TV I've modded.
EDIT: Well shoot, I was doing some testing with a multimeter and discovered that the CSYNC pin on my Saturn is fried. I get nothing when I measure it in AC or DC volts, whereas when I measured the Composite video pin I get 1.2V DC and 2V AC. I was also able to measure the 5V pin and got the expected voltage there. I'm willing to bet the original owner of my Saturn used a cheap SCART cable and somehow fried the CSYNC pin. I'm ordering a Sync-on-Luma cable to replace it and have started a return request for my CSYNC cable.
The resistor I replaced turned out to be for the 5V rail, so I put the old resistor back on there to avoid any suspicions when they receive it back.
Also another reason to make your own cables.