Supergun horizontal lines display issue

Ganelon

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I get wavy horizontal lines on my TV using my supergun that depend on the game's audio (no audio cable connected = no lines, loud sound effects and music = lots of lines and distortion during that time). Is this a result of interference? If so, is it due to the audio cables, video cables, supergun's audio port, supergun's video port, and/or Jamma harness? Thanks.
 
ttooddddyy

ttooddddyy

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What type of supergun set up is this, are you running off 5 volts only, or attenuating the sound from the audio output stage supplied by 12 volts.
 
Xian Xi

Xian Xi

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Sounds like the supergun uses a ground connected to both video and audio.
 
Neo Alec

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This used to happen to me when I would connect stereo boards using both the negative and positive speaker lines. Make sure your supergun is wired using universal ground (from the power supply) as the negative audio out, not the one off the jamma connector. I just wired my gun up with left and right RCA jacks for MVS stereo, and used ground as the negative for both. Works fine.
 
norton9478

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Neo Alec said:
This used to happen to me when I would connect stereo boards using both the negative and positive speaker lines. Make sure your supergun is wired using universal ground (from the power supply) as the negative audio out, not the one off the jamma connector. I just wired my gun up with left and right RCA jacks for MVS stereo, and used ground as the negative for both. Works fine.
Click to expand...

Seconded

Ground is not the same as negative speaker.

If anything, the negative speaker output is more like a positive speaker output.
 
Neo Alec

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norton9478 said:
Seconded

Ground is not the same as negative speaker.

If anything, the negative speaker output is more like a positive speaker output.
Click to expand...
The symptoms he described are exactly what you'll experience if you wire the negative speaker out to the TV. I'm sure that's the problem.
 
Ganelon

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Thanks for the help. It wasn't a ground issue though; it turns out that the lines were the result of interference from the sound cable. By replacing it with a more expensive aluminum coiled sound cable, everything became good.
 
Xian Xi

Xian Xi

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Ganelon said:
Thanks for the help. It wasn't a ground issue though; it turns out that the lines were the result of interference from the sound cable. By replacing it with a more expensive aluminum coiled sound cable, everything became good.
Click to expand...

Sounds like a ground problem to me.
 
norton9478

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Neo Alec said:
The symptoms he described are exactly what you'll experience if you wire the negative speaker out to the TV. I'm sure that's the problem.
Click to expand...

You mean wire it for stereo but use a mono board?

I never noticed that effect with my one slots..

I tried MVSTEREO wiring for a bunch of non-neo pcb's also...

Some had some really cool effects (pseudo-Stereo, Spacial 3d)..... Even got picked up by the pro logic.
 
Neo Alec

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norton9478 said:
You mean wire it for stereo but use a mono board?

I never noticed that effect with my one slots..

I tried MVSTEREO wiring for a bunch of non-neo pcb's also...

Some had some really cool effects (pseudo-Stereo, Spacial 3d)..... Even got picked up by the pro logic.
Click to expand...
I think you quoted the wrong post, right? Yeah, my all my mono boards work fine with my supergun wired for MVS stereo.
 
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