SNES scart cable rgb help.

[famiac]

Hello everyone, i recently purchased an official snes european scart cable. I do not own a TV with scart input but my sony PVM 2950 has RGB input. So i made myself an adapter with some bnc and rca jacks and a female scart connector. The adaptor connects all of the following: CSync, Red, Green, Blue, Audio left, Audio right, and a universal ground. When i plugged it into my tv, it did not work. I got red and blue curved lines scrolling rapidly vertically on the screen. I think this may be the image not syncing. I checked my adapter with a multimeter and everything checks out so i think it's the cable... can somebody help me fix this so i can enjoy the glorious RGB?

[133MHz]

An official PAL SNES SCART cable won't work on a NTSC SNES or Super Famicom without modification.
An official or third party GameCube SCART cable will work perfectly on NTSC SNES machines though.

Look at the differences here, basically to NTSC-ize your cable remove the little board with the resistors inside the SCART plug, install the usual capacitors on the RGB lines and join the rest of the relevant signals (sync, audio, ground).

[Phosphora]

An official PAL SNES SCART cable won't work on a NTSC SNES or Super Famicom without modification.
An official or third party GameCube SCART cable will work perfectly on NTSC SNES machines though.

Look at the differences here, basically to NTSC-ize your cable remove the little board with the resistors inside the SCART plug, install the usual capacitors on the RGB lines and join the rest of the relevant signals (sync, audio, ground).

I have a universal multi Xbox/PS2/GC rgb scart cable, and I can also confirm that the gamecube one works with my US Snes on NTSC televisions.
Of course, I'm just using a scart rgb to component video transcoder.

[famiac]

Thanks!

[famiac]

Update: i fixed the cable to be like the picture. Excluding the plus 5V because it's not used. The image looks perfect, but it is scrolling or wavy and messed, but it also only appears when there is no sync. As soon as i plug in the composite signal to the sync, the sound and the image go away. But if i reset the system, a barely distorted image appears for a few milliseconds but no sound plays. Then no image. Help? The c sync works perfectly as a video display in a regular composite image and sound works.

[Phosphora]

Update: i fixed the cable to be like the picture. Excluding the plus 5V because it's not used. The image looks perfect, but it is scrolling or wavy and messed, but it also only appears when there is no sync. As soon as i plug in the composite signal to the sync, the sound and the image go away. But if i reset the system, a barely distorted image appears for a few milliseconds but no sound plays. Then no image. Help? The c sync works perfectly as a video display in a regular composite image and sound works.

This is getting a little too much out of my territory, but maybe your display simply can't accept a PAL Scart signal or whatnot. Once again, my only experience is with an NTSC TV with a true Euro scart input (Bang & Olufsen), and on other TVs with a transcoder.

I'm probably not helping much, but possibly a Japanese RGB cable (or rewired for Japanese RGB) would suit your situation?

[famiac]

Im using an ntsc snes and the cable has no reason not to work. It corresponds exactly to the diagram minus the extra 5 V wires

[famiac]

They all share the same ground by the way. (in my setup)

[2A03]

This is getting a little too much out of my territory, but maybe your display simply can't accept a PAL Scart signal or whatnot.

PAL/NTSC issues won't matter much through RGB, and even then the output frequency is determined by the system, not the cable.

[famiac]

Bump. Please help. Im Leaving town soon and i wanna see if i can fix this.

[untinip]

Are you sure you're connecting C-sync and not composite video? I got a wobbly picture from my RGB-modded NTSC Nintendo 64-system whenever I tried to play PAL-games (using an import-adapter, of course) before I replaced the composite video signal with C-sync as per this guide:
http://www.mmmonkey.co.uk/console/nintendo/rgbntsc.htm#fourx

[2A03]

Are you sure you're connecting C-sync and not composite video? I got a wobbly picture from my RGB-modded NTSC Nintendo 64-system whenever I tried to play PAL-games (using an import-adapter, of course) before I replaced the composite video signal with C-sync as per this guide:
http://www.mmmonkey.co.uk/console/nintendo/rgbntsc.htm#fourx

That might do it. Most PVMs are fine with composite video as a sync signal but I know some throw a hissy fit if it's not a proper sync signal.

[famiac]

Ah ok. Let me try that.

[famiac]

C-sync is pin 3. So it should be a simple mod. When rgb modding a famicom, is it possible to get a C-sync instead of composite video? Or, there's a sync stripper chip, but i forgot what the name was...

[2A03]

C-sync is pin 3. So it should be a simple mod. When rgb modding a famicom, is it possible to get a C-sync instead of composite video? Or, there's a sync stripper chip, but i forgot what the name was...

The 2C03 outputs sync where the composite video would normally be on a 2C02 (pin 21). The chip you're thinking of is the LM1881.