Hi,
I've been wrestling with a problem for 3-4 weeks now and I'm hoping someone here can shed some light on it.
Basically, I'm getting some interference patterns on my monitor with my NBA Jam boards.
They kind of roll through the picture. At times they slow down, stop briefly, and then roll through the picture the other way.
I'd take pictures and post them but it's hard to get a picture where they really stand out.
I've tried tying cabinet ground to logic ground and that didn't seem to help. I've moved the AC plugs for both the monitor and cabinet onto different electrical outlets. That didn't help.
I've taken the boards and plugged them into someone else's Jamma cabinet and didn't see any issues. The KLOVer who sold them to me didn't see the issue either.
If I move the Jamma plug in this same cabinet back to my Gauntlet Legends boardset then I don't see any issues.
I've tried moving the jamma wires into a different area of the cabinet farther away from the power supply and that didn't help.
A somewhat flaky jamma extension harness seemed to make the problem worse. (extension harness is being returned).
The only things I can think of at this point is to buy a cheap jamma game and see if it shows the same problems and to wrestle my spare Visionpro monitor out of the closet and try to wire it up temporarily to see if I have the same issues with that. (I don't have any of the material to make cables long enough to sit it outside the cab so this will be a major PITA but it can be done).
So what have I missed??? Any ideas? Anything at all to try to shed light on what might be causing the problem?
At this point even if it doesn't solve the problem but might shine a light on what the problem is, I'd definitely do it.
I've been wrestling with a problem for 3-4 weeks now and I'm hoping someone here can shed some light on it.
Basically, I'm getting some interference patterns on my monitor with my NBA Jam boards.
They kind of roll through the picture. At times they slow down, stop briefly, and then roll through the picture the other way.
I'd take pictures and post them but it's hard to get a picture where they really stand out.
I've tried tying cabinet ground to logic ground and that didn't seem to help. I've moved the AC plugs for both the monitor and cabinet onto different electrical outlets. That didn't help.
I've taken the boards and plugged them into someone else's Jamma cabinet and didn't see any issues. The KLOVer who sold them to me didn't see the issue either.
If I move the Jamma plug in this same cabinet back to my Gauntlet Legends boardset then I don't see any issues.
I've tried moving the jamma wires into a different area of the cabinet farther away from the power supply and that didn't help.
A somewhat flaky jamma extension harness seemed to make the problem worse. (extension harness is being returned).
The only things I can think of at this point is to buy a cheap jamma game and see if it shows the same problems and to wrestle my spare Visionpro monitor out of the closet and try to wire it up temporarily to see if I have the same issues with that. (I don't have any of the material to make cables long enough to sit it outside the cab so this will be a major PITA but it can be done).
So what have I missed??? Any ideas? Anything at all to try to shed light on what might be causing the problem?
At this point even if it doesn't solve the problem but might shine a light on what the problem is, I'd definitely do it.


