Sync issue with JROK card in Defender K4600

YeastLord

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After a year of screwing with the original Defender boards and not being able to play the game I bought a JROK card and adapter. I wanted to leave the harness intact if I ever want to put the original boards back in.
After hooking everything up I now have a sync issue. Everything seems to be hooked up correctly. I noticed that on the adapter there are two wires coming from the adapter for sync. Do I need to hook these up to something?

Thanks for the help.
 

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Yes, it needs to be connected to the 2-pin sync-header on the board. See page 20 and 21 in the manual.

Here's the diagram
 

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I knew the answer to this. Just sayin' (as I just put the same in my StarGate + adapter harness etc). :D
 
I was trying to understand why...

but is this a separate header that goes to another plug to put on the negative sync pins?
 
I was trying to understand why...

but is this a separate header that goes to another plug to put on the negative sync pins?

There are 2 sync outputs on the board (!)


  • Standard JAMMA negative composite video sync from the JAMMA connector.
  • Secondary separate positive horizontal and vertical syncs output on the 2 pin header, which match the original board's H & V sync outputs.
The H & V outputs are on a separate header because the JAMMA standard doesn't have H & V sync ouputs on the connector.

- James
 
I'd have to see how it's hooked up, unless your board outputs positive sync too? I've only ever used your boards with JAMMA harnesses.
 
I'd have to see how it's hooked up, unless your board outputs positive sync too? I've only ever used your boards with JAMMA harnesses.

Yes, the 2-pin header is for positive Horiz and Vertical sync output.

- James
 
Yes, it needs to be connected to the 2-pin sync-header on the board. See page 20 and 21 in the manual.

Here's the diagram

That was it! It's amazing to finally play Defender.

After a bit of searching the only manual I could find was 9 pages.
Is the full one posted someplace?

Thanks again for all the help!
 
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