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Author Topic: GT Complete w/ Nanao Monitor Issues  (Read 1912 times)

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Groovyg

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GT Complete w/ Nanao Monitor Issues
« on: January 21, 2011, 03:02:41 pm »
I just finished rebuilding a GT Complete, and have it connected to a Nanao MS9-29 Monitor. The problem is the screen keeps spinning vertically, and I cannot locate a "Vertical Hold"  :-[. I have a Sega City Manual with specifications on the Nanao MS9-29, but no mention in the four pages dedicated to the monitor for V-Hold.
Any suggestions out there?

Is this a Cap problem?
Did I miss a ground?
Are the Jamma Sync and Grounds reversed?

The GT-Board jumper and Monitor are both set to Medium resolution. Picture looks great, just keeps on spinning.

Thanks.
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grantspain

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #1 on: January 21, 2011, 06:54:29 pm »
got a pic of how you wired up the video input?
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Groovyg

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #2 on: January 21, 2011, 07:19:43 pm »
I am actually going to re-do the wiring.  But will send pictures when I get it done.  Should be tonight.
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Groovyg

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #3 on: January 21, 2011, 11:29:01 pm »

Spinning Screen
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Groovyg

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #4 on: January 21, 2011, 11:32:09 pm »

I think I have adjusted all of these pots, but nothing improves the spinning image
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grantspain

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #5 on: January 22, 2011, 06:38:28 pm »
everything looks ok from the pics set up wise
try connecting a 2k resistor from vertical sync to video ground at the video input plug
otherwise i would say that there is a faulty cap somewhere
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Groovyg

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #6 on: January 22, 2011, 10:07:12 pm »
Thanks grantspain.  I will try that, and if not, remove the monitor and change some caps.

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grantspain

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Re: GT Complete w/ Nanao Monitor Issues
« Reply #7 on: January 23, 2011, 02:49:37 pm »
i worked on gt fore yesterday and the vertical sync is linked to the horizontal sync on the video input plug
try linking a wire over\(jam a bit of solder in) to see if that cures it
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