Is this a convergence or green problem?

ArcadeRu

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Just bought this arcade machine. Monitor looked off. Adjusted the focus on the flyback and that really helped, but it seems like there is a lot of green on the screen now. Here is the test pattern screen. Is this a convergence problem or a green problem?
 

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There should be potentiometers on the neck board (for some monitors anyway) to turn down each color if you aren't familiar with it.
 
There should be potentiometers on the neck board (for some monitors anyway) to turn down each color if you aren't familiar with it.
Yes thanks

I did turn down the green and it definitely improved. This particular neckboard has two greens and two reds. Is that normal?
 
you want to adjust Cutoff/Bias, not Drive
Wooops, I did drive. Thanks, I'll have to go back and adjust again. This one is hard because the cardboard really covers the pots. I have to go up and over the cardboard and down again and feel around to find the pots.
 
I just did this on a Bosconian I recently picked up. Small tweak to the green cut off and vert. height made this monitor look great.
 

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