Main > Monitor/Video Forum
Wg k7000? Bad focus, or dim picture (solved)
Zebidee:
Definitely a bit fuzzy, but seems bright enough. Convergence not terrible. You need to degauss the tube, there is an obviously discoloured patch bottom left in pics. Does the monitor have a degaussing coil fitted? Sometimes they need an extra go with a degaussing wand. You can get a cheap degaussing wand online for $10-20, and the YT demos are free! There is a kinda art to it.
Just don't keep the degaussing wand button pressed for more than about 5-6 seconds, as they can melt in your hand.
abispac:
--- Quote from: Zebidee on November 03, 2021, 10:03:39 pm ---Definitely a bit fuzzy, but seems bright enough. Convergence not terrible. You need to degauss the tube, there is an obviously discoloured patch bottom left in pics. Does the monitor have a degaussing coil fitted? Sometimes they need an extra go with a degaussing wand. You can get a cheap degaussing wand online for $10-20, and the YT demos are free! There is a kinda art to it.
Just don't keep the degaussing wand button pressed for more than about 5-6 seconds, as they can melt in your hand.
--- End quote ---
Well over at the face group im getting help, they suspect the tube is bad, and i also have found a few topics on other forums where they found it was actually the tube failing, not even rejuvenating the tube helped, i think it has to do something with bad guns. And im getting a free k7000 flyback , to not discard that problem, but i will have to wait for the 15 for that to happen. Im also thinking on finding another tube, but being a 7\8 pin tube, is gonna be hard to. Im also thinking on finding a 13 inch tube as ive always wanted a small tube, ive believe this chasis are compatible with 13inch tubes, so lets see if that works, ill keep this topic uptadate it, as i really hate how many but many topics with this similar problem, they never come up with a solution , if there was ever one. By the way, the decoloration problem is just purity problem that gets solved really easy, i just happen to take a picture after playing with the yoke trying to solve the problem.
abispac:
So I got good news and bad news on my k7000 19". The good news is, the chassis works, it still might need a new flyback but it works. Today I found a 13" Disney tv I was gonna RGB mod, as I always wanted a 13 inch monitor, but then it struck me, that the k7000 19 inch chassis also works for the 13" inch screen, so after checking the Disney tv has 7 pin to, and the readings in the yoke are similar, so I decided to give it a try, and guess what? I got a 13 inch monitor, it looks nice but the focus it's all the way up, Wich makes me think I still need to change the flyback. Anyway, I'm gonna ask a friend of mine if he can rejuvenate the 19 inch monitor for me, and see how it looks after changing the flyback. The Disney tv I'm still going to RGB mod it and use it as my 13 inch monitor. I'm so exited. The colors in the picture looked better after messing with the pots after the picture.
abispac:
So to close this, original k7000 tube needs rejuvenating, so im gonna scrap it, the new 13 inch tube looks nice, only issue focus is all the way up, but all other pots are normal, so i might be changing the flyback. Maybe not, if it aint broke dont fix it, lol.
Zebidee:
Looks good from here!
You got lucky with that tube. If you want to keep the Disney TV, maybe just find a similar donor from a dead TV.
Aside from the neck pins, is a good idea to at least compare, between the tubes, the impedance (ohms) for the horizontal and vertical yokes. This is easy to do with any digital multimeter. Ideally they should be roughly similar.