K4600 issue

Mcdog727

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Working on a Galaga with a K4600 I recapped it and turned it on and screen looked great then within 5min it did what's in the pic. Was doing it before the recap too. Any thoughts? I'm guessing flyback.
 

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Working on a Galaga with a K4600 I recapped it and turned it on and screen looked great then within 5min it did what's in the pic. Was doing it before the recap too. Any thoughts? I'm guessing flyback.

No I'm leaning towards resistors, cold solder, and transistors. Flybacks for 4600's are unobtainable.
 
I have seen many of these 4600's tube short the green. you can v erify that by pulling the green drive transistor out and see if it still does that.
 
If I hook up my rejuvenator that should tell me if its shorted correct?

it will tell you only if the tube has a short, but it won't tell you if you have a transistor on the pcb's bad or going bad.
 
That looks like it is 100% green. Even if green was shorted wouldn't you still see other colors mixed in? Just curious.
 
I've been seeing this in 4600 and 4900 tubes lately. it's like a dead heater short on the colors. there's no way to fix it.

the Galaxian at work periodically will flash full red at random, and I would entirely lose colors on the rejuvenator trying to flush it out. it didn't change at all when I was done, so it's just a junk tube. I took a good 4600 and put it in there instead, cause Galaxian deserves better.
 
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