Build Your Own Arcade Controls Forum

Main => Monitor/Video Forum => Topic started by: dirk on September 22, 2006, 10:59:21 am

Title: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: dirk on September 22, 2006, 10:59:21 am

Hi everyone,
I've got an ArcadeVGA in my PC which is then linked to a J-Pac (which the arcade machine is plugged into.)
I've installed the drivers but something is wrong. The picture quality isn't great, it is 'wavy' in loads of places:

(http://i85.photobucket.com/albums/k67/dirksmith/arcade003.jpg)

Occasionally the bottom of the screen appears at the top:
 
(http://i85.photobucket.com/albums/k67/dirksmith/arcade010.jpg)

MAME games are almost unplayable:

(http://i85.photobucket.com/albums/k67/dirksmith/arcade013.jpg)

The monitor was fine when I bought it and the bloke plugged a JAMMA game in. What have I done wrong? (I know nothing about any of this!)
Thanks in advance!

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: SirPeale on September 22, 2006, 07:45:23 pm

Almost looks like a sync issue, have you tried adjusting sync?

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: dirk on September 23, 2006, 05:02:38 am

No, how do I do that?

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: richms on September 23, 2006, 06:06:12 am

With the distortion changing with brightness of the lines its on, it could also be a grounding issue between the vidoe card and the monitor. check that is connected well and that its not trying to rely on the chassis ground for a video ground.

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: dirk on September 23, 2006, 06:23:33 am

Thanks. I'm totally new to this.
Do you mean check the video card in the PC or the J-Pac connection with the cabinet? Where's it best to put the J-Pac when it's connected?

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: grantspain on September 23, 2006, 10:49:06 am

looks like the wrong sinc signal

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: dirk on September 23, 2006, 01:00:45 pm

I'm really grateful for all your advice. How's best to check/alter the sync?

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: wildfire123 on September 28, 2006, 12:42:22 am

are you using both kb ports of the j-pac? this happen to me if im only using one of the ports in the j-pac.

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: dirk on September 28, 2006, 06:30:26 am

Yeah, one of the ports is connected to the PC's keyboard socket and the other has a keyboard plugged into it.

Title: Re: Monitor issues with ArcadeVGA, J-Pac and Xp
Post by: wildfire123 on September 28, 2006, 07:28:21 pm

is ur jamma connector looking like this? where all the pins line up
(http://i36.photobucket.com/albums/e18/wildfirewild/DSC01364.jpg)