Non-working US GC RGB cabel

[mats_j]

I've tried to make an RGB cable for my US cube following the instructions on rgbcube.co.uk. I used a japanese component cable and a standard composite one.

However, it doesn't work. I only get fuzzy composite picture, and when I unplug the composite I get no picture at all. I have RGB for all my other consoles and they work fine, so my TV is not the problem.

Everything looks OK, solder-wise. Does it matter if you use a 1/4W or a 1/2W resistor?

[Saurian]

You need to supply pin 8 of the SCART with the 12v line and bridge across with a 300ohm resistor to pin16.

Pin 8 will switch the TV to AV, and pin 16 will switch to RGB mode.

I use the Japanese D Terminal cable and a standard composite phono cable for my mods:



You can still do this with your method tho: (2 meths)

Get yourself a Nintendo RGB cable and use that for audio, composite video and voltage to pin 8 and pin 16. These cables dont have a 12v line - it's 5v to pin8 linked via 75ohm resistor to pin 16.

http://www.play-asia.com/paOS-13-71-24-70-64.html

This is the one you'll need - these are normally wired wrong, you need to switch pin 8 and 16 (voltage to 8 then link with resistor to 16 - they have it reversed)

Another way is to use a SCART splitter and force RGB via another machine.

[mats_j]

Woh-woh, slow down!

You're saying I have to get an RGB cable instead of the composite one? So the rgbcube.co.uk way doesn't work at all? (Well obviously...)

On a side note, concerning RGBs that are wired wrong, I bought a cheap XBox RGB cable from Play-Asia, which as far as I can tell only outputs a composite picture (this: http://www.play-asia.com/paOS-13-71-2b-70-18f.html). Is it also badly wired?

[Saurian]

I havent seen many 3rd party cables that are correctly wired - it's mostly that they either dont supply voltage to pin8 and 16 or they swap them over.

The best thing for you to do is to use a Nintendo RGB cable in conjuction with your component cable. The best way to do one of these cables is to use a D Terminal Cable and standard composite AV cable (nearter assembly + you get proper auto channel switch as 5v isnt enough for most screens)

So once you have your Nintendo RGB cableremove the RGB lines you are only left with:

Pin 20 - composite video
Pin 18 - ground
Pin 16 - RGB mode (bridged from pin 8 via 75ohm resistor)
Pin 8 - 5v line (bridged to pin16 via 75ohm resistor)
Pin 6 - audio R
Pin 4 - audio ground
Pin 2 - audio L

Then attach the RGB lines from your component cable to the bottom row as normal.

[mats_j]

This did the trick, and I now get crisp RGB from my US cube!

Thanks a lot Saur, you're a lifesaver!