Monitor RGB Wiring Question

Flinnster

Flinnster

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Righto... I have the same jamma looms. I simply whipped out the metal pins from the connector block, and rammed them straight into the screw terminals on a cheapo VGA breakout board.
Zero soldering for me..

vga-breakout.jpg


That works for me because my cab already has a VGA connection running to the monitor chassis though.

For you, I'd suggest snipping the wires of each loom (assuming you are not using the old loom for anything) and re-joining them with a bit of solder tinning and a covering of heat shrink, should work fine - make sure you are definitely connecting the right signal wires though!
Or you could use some kind of screw connectors.

For the neatest job I'd remove the pins + connector supplied, and find out what connector the monitor needs, and crimp up my own pins for a new fresh connector. But that's not strictly necessary if you are willing to cannibalise the old one
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6 pins would suggest separate syncs. So Red / Green / Blue/ Video Ground / Hor Sync / Vert Sync.
Jamma is combined sync out, so usually you just connect that to the horizontal pin. The vertical pin should be unused?

Flinnster2017-10-09 23:40:44
 
Judder

Judder

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This should help

http://superpacman.mattrouse.com/?p=42

It looks like your original Electrohome monitor has RGB (Red, Green, Blue) and separate Horizontal and Vertical Sync inputs where as the Jamma standard has RGB plus a combined single sync

I've not tried this but it would suggest from the above post that bridging the monitors vertical and horizontal syncs will allow it to accept the single Jamma composite sync

Your other option would be of course to run an extra wire from your game board and serve up the separate syncs - your mileage may vary but depends what you are connecting on the game board end as to what it can output

HTH
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