CDi-220 RGB Mod


I've only tested a handful of "CDi 220", front-loading units, but as long as your NTSC CDi has the Sony CXA chip, this mod should work for you too.  PAL 220's should already have the RGB SCART built-in.  That being said, please proceed at your own risk!!! 

 

Parts Needed:

You'll need a few tools for this mod (more info on the tools can be found in the tools section):
- Soldering skills! 
- Torx screwdriver set to open the CDi case & internals

- Philips head screwdriver
- Soldering iron / solder
- Thin gauge wire
- Three 75 Ohm resistors, the lowest tolerance possible

- Four 220uF/16v capacitors
- One 470 ohm, 1/4 watt resistor for the sync line
- RGB output port (any port will work, just make sure you pick a port with a matching RGB cable).

 

RGB Mod:

- Start by removing the top cover:  Remove the two torx screws on each side and the top three screws in back:
 

- Next, remove the outer screws that contain the expansion socket.  These screws were one size larger torx than the case screws:

- Before you can remove the expansion socket, remove the two screws on top, then pull up from the area by the top screws to release the socket:

- You'll find the Sony CXA chip underneath the expansion slot:

- Solder R, G, B and CSYNC (please see the note about csync below) directly to the chip, as shown here:

- Here's the actual chip diagram, in case you're interested (click for full-sized):

- Next, choose a mounting location for your RGB port.  I chose to use an 8-pin MiniDIN and mounted it where the RF adapter went, allowing the mod to be 100% reversible, without any cutting at all.

- Run all four video lines to the output.  Make sure each line has a 220uF/16v capacitor on the end, as well as a resistor on each line as well;  750ohm for RGB and 470ohm for csync.

- Find a ground point to solder to your connector.  There's no "special" place to get ground, anywhere will do (just verify with your multimeter).  I used one of the holes the the RF adapter originally mounted to.

- If your RGB connector routes audio through it, wire that in as well.  I soldered my connections to the bottom of the RCA audio ports and ran them through the RF holes to the top of the board:
 

 

Conclusion:

The CDi is pretty much the worst console ever made...but at least you can "enjoy" it in RGB!

 

Well, that's it!  Feel free to go back to the main CDi pageIf you'd like info on mods for other systems, head to the Getting RGB From Each System page or check out the main page for more retro-awesomeness.