Weird MVS Video DAC MV1C

[XianXi]

I’ve been trying to figure this one out for a while. Looking at the color bars, you can see there is a problem in the middle, usually it’s a DAC problem.

-All resistors checkout
-Both LS273s are working properly
-LS05 is working properly

Usually when there’s a DAC problem, it’s one of those 3, so I’m confused right now. Only other thing I can think of is either the /DAK or /SHAD is not working right either a cut trace or the GRZ itself is going bad or is bad already.

Any help is appreciated.

 

[Ruprit]

I know it won't help but that's the exact same issue I encountered when I installed Voultar's RGB Bypass board on a Model 1 Sega Genesis. I think I tried two different bypass boards with two different Model 1s before giving up.