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Xbox To Jamma Convertor


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#1 wild eyed

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Posted 05 March 2010 - 01:15 AM

hi all, i posted something similiar in the emulators forum but i realised it should be here.

im running coinOPS in my cabinet. using the Xboxto Jamma devices a few of you have. with some v sync and h sync tuniing i have a picture, but there are horizantal lines running throughout the screen, i can still play away but they quite off putting. can i get some advice from some pros? is there any video adjustment i can make on the xbox or the xbox to jamma convertor?

#2 obcd

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Posted 05 March 2010 - 09:27 AM

A picture of the Xbox 2 Jamma converter, A picture of how your picture looks like, and the spec's of your arcade monitor might all be helpfull to understand your problem better.

regards.

Edited by obcd, 05 March 2010 - 09:28 AM.


#3 wild eyed

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Posted 05 March 2010 - 03:33 PM

hi again

the xbox to jamma convertor is the one seen here:
Xbox to Jamma Convertor

my monitor is a wells gardner 19k7601

IPB Image
IPB Image
IPB Image

my game image is fine, its this white lines i cant figure out.

on the jamma connector there are 5 pins relating to the video
Red
Green
Blue
Ground

and

Sync

the first four are fine i.e. i know where they go,

but on the monitor there are four places were the sync pin could go.
previous games send it to -H sync on the monitor

im sending it there now for the xbox as well

but there are also +H sync -Vsync +vsync that go unused.

any help would be greatly appreciated


Edited by wild eyed, 05 March 2010 - 03:55 PM.


#4 obcd

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Posted 05 March 2010 - 09:15 PM

The stripes look like a noise pattern coming from a switched mode power supply or something.

If you disconnect the RGB signals from the jamma pcb, and you gnd those inputs on the monitor (preferable using 1K resistors.), do you still see the white stripes?

Have you seen the monitor working fine with it's original game?

The fact that the edges of the image aren't straight indicates that the sync isn't working as expected as well. An unstable monitor supply can cause similar issues.

What game does the monitor come from? Maybe the sega arcade museum can tell us more about the type of video signal that was used for that specific game.

Sorry I can't be more helpfull.

regards.

#5 wild eyed

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Posted 08 March 2010 - 08:37 PM

its works fine with my neogeo mvs. the sync from the jamma connects to -H sync for the neogeo and it displays fine.

im not really all that technical when it comes to resistors etc. sad.gif

#6 dsdork

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Posted 14 July 2011 - 04:50 AM

Did you ever get it figured out? I want to buy one of those JAMMA XBOX1 converters but want to know if they work.

Thanks.




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