Sanyo 20ez low red

barrysfarm

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I've got a sanyo 20ez in a mario bros cabinet that has an issue with it's red colors.

I've turned the red drive and red bias on the neckboard up as high as will go, but it doesn't seem to nearly as much as the blue and green knobs do. One of the red knobs seems to do something when turned, but the other one doesn't. I'm guessing that's where my problem is.

I have to turn up the brightness on the flyback up to the point where the black areas of the screen aren't entirely black anymore (as seen thru the bezel), and it washes out the other colors too.

Anything I can do? Should I try to replace the drive or bias pot?
 
I received another working sanyo chassis a few days ago, and tried switching that out. The reds look 100% better. Looks like a new monitor. I'll stick pick up a rejuvenator, but doesn't look like i'll need it for this tube.
 
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