UPDATE! RetroRGB has some very important info regarding the AES 3.6 board, please check out Bobs page and consider doing the fixes there! Thanks Bob!
There’s already a few pages on the web that detail the various different versions of the SNK Neo Geo AES and their RGB output quality – here’s just one. If your motherboard is the NEO-AES3-6 type, then it’s worth your while trying this other guide first.
If your Neo Geo motherboard isn’t an NEO-AES3-6, it’s possible to bypass some of the components to try and improve RGB quality. All of the info you need can be found on the Neo-Geo forums, info originally posted by MKL.
Here’s a few photo’s of the my mod, and a few notes I made whilst doing it.
The first photo above highlights the components to remove (highlighted in their relevant colour), the second photo is after I have carefully removed the glue using long nosed pliers.
Here it is after desoldering the parts. It’s quite easy even with cheap equipment. From the underside of the board I simply heated the solder on each component leg and then used a desoldering pump to remove the solder. If necessary I added some extra solder, you may find it easier to straighten the legs of the components that you need to remove.
I’ve read on a couple of forums, and it’s been recommended to me by a couple of more experienced AES modders to fit resistors onto the RGB wires, I used 75ohm, attached to short wires and then heat shrinked. It probably would have been possible to just insulate the resistor legs instead of cutting them and attaching them to wires – I just wanted to show you the colours.
I started with the Red and Blue signals, I found it easier to do Blue BEFORE Green – it’s obvious if you look at the photo below. Make sure you tin the wire and resistors, and even add some additional solder to each of the contact points you need to use. You can also see the Yellow Sync signal.
There we have it, nice and simple really. Doing it this way will remove composite, but will let you use your existing RGB Scart lead, a big thanks again to MKL :-)
Don’t forget, Retro Gaming Cables sell AES RGB Cables – use the code MMMONKEY for 10% off!