Shinobi wont work on New AstroCity :/

[Ex_Mosquito]

Heya, I have a small prob. I have a Shinobi PCB converted to Jamma but for some reason I get what looks like a Vsync issue when using it on my New AstroCity, but the sound works fine. It works perfectly through a Supergun running on rgb scart, though. With no issue at all. Just not on the Astro. Any reason why?



Cheers, Mark.

[grantspain]

looks like video ground

[Korszca]

Looks like the video ground is missing. Check to see if you have video ground, pin 14.

EDIT: Ninja'd by grant

[Ex_Mosquito]

cool, thanks for the quick replies. Do you mean pin 14 on the system16 converter or the astro loom?

[Ex_Mosquito]

Ah just checked, theres no wire on pin 14 of the system16 converter :/ Do I just wire it to any spare ground on the shinobi end (bottom) or to a spare ground on the top (astro end)?

[FrancoB]

I was looking at the Shinobi pinout yesterday and saw this note:

Take notice that the Shinobi Arcade board does not have a separate VIDEO GROUND pin. What
you must do is simply jumper a wire between pin 14(VIDEO GND) and any available GROUND solder
through-holes on the JAMMA Fingerboard. This will provide the ground necessary to base the video signals off of.

Looks like that should sort you out

[Ex_Mosquito]

Excellent, it's working now Looks like it was the video-sync after all.

Thanks Guys! Mark