Help with Jamma cab - converter board set up

Bearcat93

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Hello,
I'm sure I'm overlooking something pretty basic here, but I'm attempting to use a jamma cab for my Popeye board. I have the nintendo jamma converter, but there's no video / monitor signal. How do you hook up a monitor to an original nintendo board with a jamma converter? There's not a pin out like on a jamma board. Thank you! Jeff
 
You need the rainbow cable between the top and bottom boards to get video. If you don't have that on there, you will get nothing.
DK3_Harness_3.jpg
 
You need the rainbow cable between the top and bottom boards to get video. If you don't have that on there, you will get nothing.
DK3_Harness_3.jpg

NOTICE:

That cable is twisted in that foto for a reason and if and when you make one of these your cable should have that twist also. It is NOT pin 1 to pin 1.
 
yeah, i recently repaired a boardset, and the customer said it didn't work, when i got it, the cable was flipped and off 1 row of pins :( needless to say its all goofed up, not looking to find all the bad chips on this repair..


so yes, WATCH out and make sure that cable is plugged in correctly!
 
Rainbow wires

Yep, got that and it's flipped, just like in the photo. I think my issue is my monitor connects to the jamma board, which of course is disconnected when I put my popeye + converter in. It would appear that I have no connection from my pcb to my monitor. Is there some kind of adapter needed to connect a modern LCD monitor to a jamma converted board? Sorry if I'm not explaining this well, I'm not all that technical. Thank you, Jeff
 
Yep, got that and it's flipped, just like in the photo. I think my issue is my monitor connects to the jamma board, which of course is disconnected when I put my popeye + converter in. It would appear that I have no connection from my pcb to my monitor. Is there some kind of adapter needed to connect a modern LCD monitor to a jamma converted board? Sorry if I'm not explaining this well, I'm not all that technical. Thank you, Jeff

Ok, now you're getting somewhere. We all assumed you had a regular JAMMA cab with a normal arcade monitor in it. To output to an LCD (or anything running VGA), you would need a video converter board as well. Real arcade PCBs output video to RGBS monitors. So you would need something to convert from RGB to VGA.
 
LCD follow up

Ah, thank you, I knew there was something missing (both in my explanation and the overall set up). Where does one get a converter board like that? Thanks!
 
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