Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: lb on May 20, 2003, 07:11:18 am
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hey all,
I have a wells-gardner k7500 currently hooked up to my neo-geo mvs board. The problem is that when i turn on the cabinent the monitor's frequency looks all wavy (the picture)
what is there that i could do,
i know that the monitor came with a wiring adapter that i took off the monitor and plugged in the old neo geo one......
any help would do
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If it only happens when you first turn the monitor on, just let the monitor warm up first before you use it.
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Ok,
So I found that the composite cable was in the ground? and the ground was in the composite spot for the monitor, so i swapped them and everythign turned out fine....allmost.
the almost part is that i get not one image, but three overlapping images to appear on the screen, and the red, green, and blue lines appear to be staggered. I did a service test and the crosshatch lines are white and straight for the horizontal lines, and i get very wavy vertical white lines? what should i do?
i found the H-HOLD on the monitor pcb board and adjusted it the closest i could, but still no prevail, nothing seems to line up those damn lines and fix the image, i also switched neo geo boards to see if it was the board, still no good. please help.
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I have the same problem than you. Mine is a Wells Garnder 27K7501.
Here's the problem :
the 3 primary don't converge on the edge of the screen :
(http://www.dragonslair.be/pictures/monit1.jpg)
closer :
(http://www.dragonslair.be/pictures/monit2.jpg)
Look the white border lines... and the ghost lines :-(
(http://www.dragonslair.be/pictures/100_0003big.jpg)
with a white background :
(http://www.dragonslair.be/pictures/100_0006big.jpg)
here it's suppose to be while lines :
(http://www.dragonslair.be/pictures/100_0007smal.jpg)
It's worse when i have red text ( see the ghost text ) :
(http://www.dragonslair.be/pictures/100_0011small.jpg)
I'm affraid there is no issue at this problem. I check every harware setting, even the 6 rings on the back of the CRT.... My brother is a TV technician, he inspect it, and goes to the following conclusion : change the whole CRT :-( too bad...
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The picture tube needs to be rejuvenated. If that doesn't help then you need a new picture tube.
Neo Geo is a standard res game not medium res. All the Neo's I've seen had mostly Wells 25K7191.
You should not have a medium res k7500 in it.
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The picture tube needs to be rejuvenated. If that doesn't help then you need a new picture tube.
How can someone rejuvenate a picture tube? Do you have to send it somewhere?
Mike B
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Take the monitor to a tv repair shop and tell them the picture tube needs to be rejuvenated. Should cost around $50.