First I removed the mainboard from the VIC 20 and searched the correct components, a 0.1 F condensator and a 75 Ohm resistor (I took 2 150 Ohm resistors and placed them in parallel of each other).
The unmodified circuit.
I Removed the two components that were not needed anymore, and replaced them with the new components.
Next I cut some traces and connect pin 4 of the connector to the new chroma signal.
I cut not only the 2 traces in the video circuit but I also cut the power supply line so I’m sure I don’t fry something when using the wrong cable.
The image is more clear now, but the mod disables the normal output, so there is no support for tv/monitors without s-video.