Centipede Cocktail -> Gonbes VGA Converter

bteeter

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Aloha All,

I have a Centipede Cocktail with a dead monitor. I am trying to replace it with a nice LCD and a Gonbes board to convert to VGA. (I know, not pure, I get it. I just want it to work.)

Anyways, I have the R, G and B connected to the RGBHV harness provided with the Gonbes board. The video out connector on the Centipede has 5 wires coming in, 6 coming out. There are 2 wires coming out of the sync connection, purple with a white stripe on each.

I've tried variations of connecting the grey, yellow and both sync wires on the RGBHV harness to the sync wires from the original wire harness, but no luck. The closest I got was a really garbled screen.

Any idea how I can wire this up properly?

Thanks - Brian
 
Did you ever get your centipede to work with the Gonbes board. I am trying to do the same thing and not having very good luck.

-Gary
 
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Yes I did. You cannot use the RGBHV harness that the board comes with. You need to use or make a harness that attaches to the RGBS pins - the 5 pins on the board itself. If you connect to those matching the correct wires to the board pins it should work with almost no adjustment.

Hope that helps!
 
Yes I did. You cannot use the RGBHV harness that the board comes with. You need to use or make a harness that attaches to the RGBS pins - the 5 pins on the board itself. If you connect to those matching the correct wires to the board pins it should work with almost no adjustment.

Hope that helps!

Can you elaborate a bit on this? It doesn't make sense to me at all.

My Gonbes has three video in connectors:

P11, which is a mini Molex(?) — it comes with a connector and wiring for this plug.
P3, which is RGB, GND, and sync.
P10, which is labeled VGA_IN

The thing is, all three connectors are tied together, so the S pin on P3 connects right to the S pin on P11.

It shouldn't matter what connector you use, as long as you have the pins hooked up correctly.
 
I was able to get mine to work using the P11 mini molex connector but had to use the composite synch from the board. Also I did not use H & V synch since they did not work.

I have to look how I wired it, I connected to comp. synch to either H or V and it produced a signal but it is not stable. It appears to loose synch ever so often and the image is jumpy.

I will try and connect to the P3 instead.
 
Was helping a colleague with their Centipede; the original monitor died and he decided to go the LCD/Gonbes route. There is some incompatibility with Centipedes H and V syncs that don't work for the Gonbes card. Centipede has a composite sync at pin 12 (last one on the video connector, opposite the ground at N). This signal seems to be able to drive the card just fine on the P3 RGBS post (RGB and ground were still going to the other connector at P11).

I spent a good 2 hours with the digital probe to figure out when the Hsync is put to the gonbes the signal goes flat.

On this rig there's a separate 110vac -> 5vdc transformer to drive the Gonbes card, but its wired to the cabinet 110v AC.

Hope this helps!
 
I have tried and tried. I cant get a signal. Frustrating.

Nothing at all or can't lock sync ? I fought with one for a couple hours
with a Crystal Castles and couldn't get a stable picture. Finally pulled the
monitor from a Pengo and put the flat screen in the Pengo. Now everyone's
happy.

JD
 
No signal at all. The game plays blind. I have tried using h and v sync and composite sync. Still no signal. I swapped the ar2 board from my star wars just to try it and still nothing. I have even bought another wire harness. Im sure im missing something here.
 
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