SFC Jr. RGB Mod Problem

Ciel

Newb
I got a modkit from www.oldskoolconsoles.com/ and soldered everything up following his instructions. Im also using an HD Retrovision cable and until my retrotink 5x arrives an Retroscaler 2x. Now im having the problem that white does not really look white its more of a greyish color. The Seller said i should increase the value of R3. I did follow his instructions and used a 2k2 with no change. I also tried an 1k8 and a 2k7 with no effect. Anyone got an idea what could be the problem?

I uploaded some pictures of the soldering and mod. Aswell as an comparesion of the moded SFC Jr. and my SNES mini which is the image quality that i want.

https://postimg.cc/gallery/kD0jqs7
 
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