K7000 color issue

sfluter

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Any input is appreciated. The colors, green more than any, starts off bright when the machine is on, but then tends to fade a bit. It can then can come back to its original intensity if you just wait. Beyond a re-cap is there any other reason the color intensity would be fading in and out?
 
Aside from possibly being the tube itself....... check the neckboard over real good for cruddy solder joint on the drive transistors and resistors. Also check the solder joints on the video input header pins where the video cable plugs in.
 
If the you can see the other colors but the image has a green hue to it then your tube could have a shorted green gun. The only way to fix that is with a tube tester/rejuvenator.
 
Thanks for the input. I can check the soldering on the neckboard, but rejuv'ing isn't an option at the moment. Would that be something that could be done at a regular TV repair shop?
 
Thanks for the input. I can check the soldering on the neckboard, but rejuv'ing isn't an option at the moment. Would that be something that could be done at a regular TV repair shop?

If they have one - before I got mine, I stopped in @ my local repair shop, and they didn't have one.
 
Thanks for the input. I can check the soldering on the neckboard, but rejuv'ing isn't an option at the moment. Would that be something that could be done at a regular TV repair shop?


What area are you from? There may be one of us close to you that could check that tube out. Although, if you have a gun shorted to a heater there isn't much a rejuver will do. They can only remove G1 shorts. It may just need a zap to clean it up though.
 
Turns out my mom worked with a TV tech back in the day who will give it a go if I bring him the tube. Talking to him further he said it was too bad I didn't call him a month ago because he got rid of a truckload of tubes, a lot of them 19" and 25". I don't know how much longer these guys are going to be in business. There can't be too many CRT's left to work on.

Before any of that I need to have a closer look at the neckboard. I don't have the chassis right now, it was a call from a buddy of mine and I said I would look at it and help him if I could. So it probably won't be until next week that I'll know if I am making any progress. Thanks a ton for the input to this point.
 
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