So, after working with the CMVS kit from Tindie for a bit (https://www.reddit.com/r/neogeo/comments/17pcmky/consolized_mvs_kit_from_tindie_a_review/) I've encountered a flaw in it's design.
The video output is quite washed out, due to the output voltages being too high.
https://preview.redd.it/rurs178kyg7c1.png?width=900&format=png&auto=webp&s=fc6b4b1fa412a0f17b6bc5f4acd12d3a7b441a8f
Ultimately this looks to be caused by having some 220uf capacitors inline with the RGB output from the JAMMA connection, acting as a simple RGB amplifier. Replacing these with resistors (using 330 Ohm) addresses the problem.
https://preview.redd.it/oeckxjftyg7c1.png?width=1029&format=png&auto=webp&s=96d0e85807b03d6845064f8c85929751f7b6d90c
https://preview.redd.it/oapj3awzyg7c1.png?width=928&format=png&auto=webp&s=9ce8909ffb570ccf4a3b3c809d23a7d5d2eb6a87
But it is possible this has overcompensated (a bit dim now). Going to see if I can put in some 500 Ohm potentiometers in so that the output voltages can be fine tuned.
submitted by /u/sarduchi
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Source: https://www.reddit.com/r/neogeo/comment ... ie_update/