dbstallman
Member
Now that my Simpsons board is 100%, I have turned my attention to my two Gauntelt boards.
The first one has a number of issues, but the first I want to tackle is a lack of grey scale. The colors, black and white are all fine, but there is no shading. The esiest way to see it is on the ghosts :

They don't get darker as they get weaker. You can also see it easily on Gauntlet logo on the title screen, the colors don't graduate from one to the other, they are just single solid bars.
I have the schematics and have found the circuits for red, green, and blue but nothing seems to indicate how the black level is controlled.
It's not the monitor adjustments either, that picuture is from my JAMMA cab that runs all other boards with out issues.
Thanks for the help,
Brian.
The first one has a number of issues, but the first I want to tackle is a lack of grey scale. The colors, black and white are all fine, but there is no shading. The esiest way to see it is on the ghosts :

They don't get darker as they get weaker. You can also see it easily on Gauntlet logo on the title screen, the colors don't graduate from one to the other, they are just single solid bars.
I have the schematics and have found the circuits for red, green, and blue but nothing seems to indicate how the black level is controlled.
It's not the monitor adjustments either, that picuture is from my JAMMA cab that runs all other boards with out issues.
Thanks for the help,
Brian.
