Ground Pins On Scart Cable

[lettuce]

Quick question about making your own scart cable, is there any real benefit to connecting up all the ground pins on the scart socket, or will just solder 1 or 2 pins be good enough. Ive always soldered (daisy chained) all the ground pins up before but not sure if theres any real benefit?

[Mantrox]

I have been thinking about this one myself as i have original RGB Scart Saturn cables with very annoying interference in the image, and it most definitely is because of poor grounding.

As i have made some custom cables before i would like to know as well what's the best practice when wiring these.

[kamiboy]

Depends entirely on whether all the relevant ground pins are connected together on the display/console side.

Daisy chaining inside the SCART is only necessary if each ground connection is isolated, or only one of the ground pins is actually connected on either side.

Honestly, it is a crapshoot. The often poorly inplemented SCART standard was made with good intentions, but that is what the road to hell is paved with as the saying goes.

[lettuce]

Daisy chaining inside the SCART is only necessary if each ground connection is isolated, or only one of the ground pins is actually connected on either side.

So if you were to buy just a scart plug with intentions to wire it up from scratch, each ground pin (i think theres approx 8 pins for ground universally) is isolated from each other right, so in this case you would be advised to daisy chain them??

[kamiboy]

I usually connect video, audio gnd to the casing ground. But often that is not necessary. On the display side all grounds tend to be connected, so it suffices that you connect each gnd from the console side to one of these display side gnds. Actually on the console side there usually is just one gnd wire, and perhaps also one from the isolating mesh around the cable.

It should be enough to connect those two to the casing gnd of the SCART header.

[ApolloBoy]

When I built my own SCART cables I wired up all the ground pins together. Better safe than sorry.

[wyo_vr4]

Best practice: Connect and interconnect all grounds.

Acceptable: Connect all grounds. Interconnect audio, c-vid/sync, and the casing. Usually this is sufficient, so try this first.