SCART Cable to SVideo

[Dunedin397]

Hello Everyone,

How would I convert an RGB SCART cable to output an SVideo signal only (ie no RGB, no composite)? I know I need to remove certain pins from the cable, but which ones?

Cheers,

Dunedin

[MD]

What do you mean convert an RGB SCART cable to S-Video? Most games cables are wired up to RGB only so your going to be out of luck there.

If you are talking about something else then it could be possible (S-Video uses the Green and Composite video lines of a SCART cable), although to autoswitch you will need some voltage too.

Although your TV and equipment must output a S-Video signal via SCART and not all of them do. If they don't then your going to get a black and white picture...

[Dunedin397]

A fully wired (21 pin) SCART cable carries composite, SVideo and RGB signals as well as left\audio (and ground, etc). My TV will accept SVideo signals via a SCART socket but instead of using an SVideo cable and an SVideo to SCART adapter, I thought I'd try and convert an old SCART cable to only present the SVideo (as well as audio) signals to the TV.

Dunedin

[charlesr]

Normally, you just leave the scart lead well alone and select the Svid channel on the TV dude. And you may have to ensure it's plugged into the correct scart socket on the TV. One of mine accepts rgb signals, the other accepts svid signal.

If you don't mean this at all, then you'll need to clarify.

[amorenod]

Maybe you can select the input type somewhere in the TV menu. For example, my TV has 3 scart connectors (2 RGB, 1 S-Video), and I can select between composite and the better video modes on every scart, i.e., if I select RGB and i try to view something in composite, i'll get a black screen only with sound. Same with S-Video, but with a very messed screen instead of black.

EDIT

As charlesr says. I'm slow, man.

[MD]

Basically the device outputting the signals should output S-Video (not all due, thats why they have a S-Video connector on most things), and if your TV doesn't pick up the S-Video signal then you need to manually select it (else just select AV).

You can't wire it up to S-Video (as S-Video is the Red (put brain into gear) Video line and Composite Video line which are already wired up..). S-Video is treated by the TV as a Composite video signal but will use the Luminence input if it finds it.

Failing that then you will need a S-Video to SCART lead which aren't that hard to find (or a S-Video to S-Video lead and a S-Video SCART block).

[Dunedin397]

Thanks for that MD, I was thinking that this is what's happening. I'm using SVideo on a chipped UK PSone, UK PS2 and a US PS2. These connect via an SVideo cable to a JoyTech switching unit which then connects to the TV via an SVideo to SCART lead. I use the UK PS2 as a DVD player.

The reason I'm not using RGB is because that socket is connected to another Joyech switching unit that's got 2 Freeview boxes connected (a hard drive recorder and a VCR).

I have a 2nd TV in the conservatory and the same sort of connections will apply (but without the switching units). As the PS2 might be used for DVD I use SVideo.

I'll have a mess around and maybe reconfigure things but as the other half as to be able to use things I need to keep it simple.

Dunedin

[Madbury]

Just to hijack this thread, what I want is a scart to SVid lead then for video capture. I don't want to have to break out all of my old cables for the consoles. What I want is a scart socket that is wired to an SVId plug. Question is what pin connections do I need from the Scart end and do I need to do anything clever with them before they get to the SVId end.

Svid is 4 pin yes?

[superkully]

S-Video (video) is two pin, one for Chomiance and one for Lumiance.

[MD]

And one each for lum ground and chrome ground and a shield ground as well...

Anyway to make your own S-Video to SCART lead...

Viewing the solder side of the 4 Pin Mini Din plug...

....4..3
...2....1
.....__

(ignore dots, there to make sure it lines up correctly...)

1 - Luminace Ground
2 - Chrominance Ground
3 - Luminance
4 - Chrominance

You Could connect the shield as well but it's not needed.

You will also need two phonos for Audio... the inner pin is Audio and the outer ring is ground. Simple huh?

SCART lead.

(The solder end is numbered... pin 21 is the outer shielding, Top row odd numbers, bottom row even numbers)

2 - Audio Right
4 - Audio Ground
6 - Audio Left
18 - Luminance Ground
20 - Luminance
13 - Chrominance Ground
15 - Chrominance

(Technically all the Grounds are connected together internally, although I did find a Sony Studio TV that had all the grounds shielded off so you had to connect up the right grounds or the picture quality was rubbish...)

I would use mini coax cable (XR88V) for the video, using the braid as ground and a pair of stand phono cables with one end cut off for the audio. Although you could use gold plated phono plugs, silver solder and high grade oxygen free screen pair cables (XS40T).

(Codes are maplin codes...)