There appears to be some different revisions of this PCB out there.
Here's the pic provided by the seller:
However, here's some pics of the PCB I received:
As you can see the sound program(?) has been switched from a DIP through-hole package to a surface mounted ROM, but the samples(?) is still a regular through hole EPROM.
Also, they added various ceramic capacitors to the board which actually have through hole mounting, though there are still are still a couple in the bodge fashion.
The PCB itself is of a higher quality construction than I was expecting and it has a keyed JAMMA edge as opposed to the non-keyed one I've been seeing pictures of.
The sticker near the JAMMA edge has dates of 2008/2009, but who knows if it was actually produced that late or if it was just checked or repaired at that time.
Unfortunately the video doesn't want to sync with my MS9 or MS2930 as-is, so that's a bummer. It does work fine via HAS supergun, but without audio.
The seller notes the following:
"this jamma pcb is special,cbox/supergun will be no sound,you can connect the jamma 10pin that sound will be work."
No idea what they are talking about regarding fixing sound on a supergun, but for me the video sync issue is a bigger problem.
Since it works fine on the HAS, I'm guessing a sync cleaner of some kind may fix this up for Nanao monitors?
In my pic, is the TEXT rom the W27C257-10, or the W27E257-12 next to it?