Hantarex MTC 9110 won't sync

TheMaze

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So I've been trying to resurrect my Mortal Kombat repair from hell, and I'm almost there. I picked up a Hanatrex MTC 9110 monitor last week which was "functionally challenged" - it fired up, but to a shrunken raster (or so I'm told). Before I started tearing into it, I did hook it up, and sure enough, shrunken raster, but at that point I couldn't get a stable picture (monitor seemed to be free-running...video was definitely there, but it was scrolling)

I re-capped the monitor tonight, and found at least one cap that was visibly damaged. The good news is I have a full raster now on the monitor. The bad news is I still can't get it to sync.

The controls on the remote board do have an effect, but I can't dial in the picture. I've tested the MK board in another cabinet and it works fine in that cabinet, which leads me to believe it's this monitor.

The one thing I'm unsure of is how to connect the sync wire. The monitor has an H-sync and a V-Sync input, but the Jamma harness only has a single sync connector - should this go to H or V? I've tried both and it doesn't seem to make a difference.

The next part of the question is the PCB has a space for a sync polarity switch, but there is no switch installed - is this a problem?

Any ideas? I strongly suspect the monitor is working fine at this point and it's just a matter of getting the sync wires/polarity sorted out, but I'm not sure where to go from here. Thanks!
 
Did some more digging and saw a random mention that the sync on the 3-pin input connector wasn't the same as the 6-pin input. Looked at the schematic, and sure enough h-sync was different. Moved ground and h-sync over to the 3-pin connector and I got a stable picture, though it was washed out.

Turned down screen voltage a bit and we're good. I still need to go through and set the voltages/drives properly, but at least I have a working monitor now :)
 
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