Video Game Tech
Famicom - Composite Video Mod
for the schematic / parts list. I used this grounding point to anchor the circuit.
Power, video in connections. The green wire is the video out, not yet hooked up.
Jacks installed, all connections made. Because of the cartridge eject mechanism, you've got to keep all the wires secured and within the middle section of the case.
Rear view of jacks.
After testing, I decided that the video signal was way too hot. I installed a 100ohm pot & adjusted the output to my liking. I didn't measure it, but it probably ended up being around 60-80ohms.
Famicom Disk: Boot-up screen
Disk System: Metroid title screen
There are some vertical lines visible, but usually only on black backgrounds with very little text/graphics on screen.
Famicom Disk: Metroid game screen