Dodonpachi PCB video problem

[angrycoder]

Hey guys,

Picked up a DDP pcb from a fellow board member the other day. The pcb is working. I am getting sound and the controls work, but no video.

I have a Matt Ross made supergun, works fine with all my other PCBs. I've tried running the vid out via composite, svideo, and rgb -> x-rgb2 -> VGA to both a crt and lcd tv with no luck.

Is there some weirdness with DDP's video similar to the raiden games? Is there anything I can adjust on the board or on the supergun? Or will this just not work with my setup.

Thanks in advance.

[robivy64]

I've had a few members send me DDP PCBs to service over the years, and they all described the same problems that you are describing. Once the boards arrived, all of them played perfectly fine in both of my Astro City cabinets right out of the box.

All of them came from owners using superguns. I have also noticed that I can't capture video from a DDP PCB using any of my capture cards or DVD recorders.

I'm sure there are members here that play the game using a supergun with no problems. I suppose it depends on one or two key variations in the supergun hardware.

[dpful]

Maybe try and connect the controls ground with the video ground? You could do it with a paperclip if you were careful, right at the pcb's Jamma edge. It just a guess, but I've had boards that needed separate wiring for both of those grounds. (they're supposed go to the same common ground). I can't think of another wiring issue that would cause that. -----also, the pcb itself could output signal outside of your Tvs range (but not an arcade monitors). Someone else here could confirm that? I know some cave games have odd video stats.

[angrycoder]

I was fiddling with this some more today and something really weird happened....

When I was flipping the power switch off slowly (its a rocker switch), the video displayed briefly on the screen, maybe for .5 seconds, before it powered off.

Is it some kind of voltage issue? I have no idea what I'm talking about here.

[robivy64]

What RGB converter are you using in the supergun itself?

[drunkninja24]

I've had a few members send me DDP PCBs to service over the years, and they all described the same problems that you are describing. Once the boards arrived, all of them played perfectly fine in both of my Astro City cabinets right out of the box.

All of them came from owners using superguns. I have also noticed that I can't capture video from a DDP PCB using any of my capture cards or DVD recorders.

I'm sure there are members here that play the game using a supergun with no problems. I suppose it depends on one or two key variations in the supergun hardware.

I use a Vogatek Mk II supergun, and my DDP PCB works fine with it.

[PC Engine Fan X!]

I've got one of those 2nd gen Matt Ross crafted Superguns and will try it out with said DDP PCB and report back the results. Said DDP PCB does work just fine with one of those ultra compact Vogatek MAK superguns (with the adjustable RGB level output dials). Of course, this 2nd gen Matt Ross supergun is using one of those JROK transcoders that converts arcade RGB into S-Video or RCA composite video output at best.

What's interesting about this 2nd gen MR supergun setup is that it's possible to have it connected to both an 15kHz low-res RGB monitor and a S-Video TV monitor at the same time when running a PCB. A cool but novel feature indeed.

PC Engine Fan X! ^_~