Nevermind - Figured it out


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Posted by Krusty on 20, 2000 at 10:32 AM:

In Reply to: Problems with video to arcade monitor - Please Help! posted by Krusty on 19, 2000 at 11:34 PM:

I fixed my problem late last night - I had a connector that was giving me trouble. I replaced it and everything started working fine...

It's so much nicer with Blue, Green, AND Red :)

: I am having a problem hooking the video to the arcade monitor. Everything looks good, except that I have no red color at all. Let me go into more detail about my setup:

: I have a 233MHz computer with an ATI XPert 98 PCI card, and 96MB RAM. I am running the video through the monitor circuit found at the PC2Jamma page. As far as I can tell, the circuit is built properly. I have traced out all the connections on it, and it seems to be working properly. When going into ARCADEOS, the colors look really washed out. I went to the color test screens, and green and blue show up fine, but red shows up as black. The JAMMA board in the machine displays red fine, so I don't believe it is the monitor. I have adjusted the red pot on the monitor to see what happens, but there doesn't appear to be any effect on the picture.

: I have traced the red cable from the monitor to the video control circuit, and then back to the video cable going to the computer, and it all seems to be in order (no shorts that I can find). I hooked my voltmeter to the RED going to the arcade monitor, and got about 0.8. I switched the test pattern screens from RED to BLUE to GREEN, and this voltage never changed at all. However, when I hooked the voltmeter to GREEN, the voltage was fairly low until I hit green on the screen test, and then it went higher. The same thing happened when I hooked to BLUE on the monitor, which makes sense to me. I don't understand why my RED keeps a constant voltage, but I figure that's part of my problem.

: When I hook the computer to a PC monitor, I get red just fine.

: I realize this is a lot of info, but I wanted to cover as many bases as possible. I welcome any suggestions as how to rectify this problem. Thank you in advance.




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