Whats the resistor changes for a G07?? Please?? (NT)


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Posted by Arcade Fan o Rama on 3, 2001 at 9:11 PM:

In Reply to: Re: 220uf caps and j-pac and brightness posted by Andy Warne on 2, 2001 at 7:36 AM:

: Using caps cannot amplify the video signal. What it's doing is changing the DC level which may make the picture brighter but the contrast will still be low. the problem you are seeing is to do with the DC level going up and down and affecting the brightness.
: If you can let me know what monitor this is, I might be able to find a better solution. Wells-Gardner and Hantarex monitors are designed to be used with 1 volt (VGA level) or 5 volt (game PCB) video but there are a couple of makes that are'nt. One is the Electrohome G07 which can easily be modded by adding 3 resistors, another is the Kortek which I am looking at the schematics right now. The aim is to increase the gain of the video input stage.

: : Installed the 220uf caps and removed the vga lead from the j-pac and can get a reasonable screen on my arcade monitor now, problem is when I get the menu up in mame to change resoultion etc the colors behind the black menu in the game become perfect, when the menu goes off they go dull again, any idea what changes in mame when you bring up the menu that would improve the colors so dramatically.




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