More CD-i members ask how to improve the video output quality of their Philips CD-i player. Their are several tricks mods online available which we like to highlight. In the case of the CD-i 450 toploader model, Neil from 8bitplus has made a very nice tutorial how he managed to get RGB outout on his CD-i 450 player.
Neil: "The 450 console was in the “not possible” to mod category until AssemblerGames forum member Taijigamer2 found the CDi 220 service manual through another forum contact of his. Manual can be found here. With this part of the schematic it was discovered that the video encoders could be switched from s-video Y/C to RGB by pin 14. With pin 14 is lifted while connected to 5v (through a 1k ohm resistor) RGB mode is enabled. This applies to both BT9106 and BT9107 video encoders and they have the same pin-out. These encoders can be found in different CDi units. The RGB signal can be taken from pins 4,8,6. Sync can be taken from either pin 2 of the BT9106 or from the composite video socket. I went with the composite video for sync. After experimenting with the RGB output levels I was able to get the right output level with 3x 180 ohm resistors."
Find the detailed guide here: http://8bitplus.co.uk/your-consoles/philips-cdi-450-rgb-mod/
If you want to do this mode yourself, contact Neil here.
[Thanks, 8bitplus]