Galaga to Jamma Sync issues

SavePointVG

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A little back story. I am rebuilding a galaga 3 cab that was placed inside a really old data east cab. First of all I do no know what kind of chassis this thing has. I got a jamma harness for it and a conversion adapter but Im having trouble figuring out what to do with my syncs. Ive looked on bob roberts page about the issue but I cant find the chassis that I am using to help compare issues. Im left with a pos and neg sync from the chassis and only one sync from the jamma. Just curious if anyone has run into this problem before. Thanks!


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You need to add a connector. The Jamma harness outputs a composite negative sync. The connector you showed has wires for vertical and horizontal positive sync. Add a 3 position .156 molex with a single wire to the middle position.


By the way, that is a WG 4900 monitor.
 
You need to add a connector. The Jamma harness outputs a composite negative sync. The connector you showed has wires for vertical and horizontal positive sync. Add a 3 position .156 molex with a single wire to the middle position.


By the way, that is a WG 4900 monitor.

And a giant picture...
 
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