LyonsArcade
Well-known member
How can I tell if I have a bad yoke or not?
I have a K7200 13" monitor in a game, and the screen started having serious convergence issues. It looked as if the Yoke had been pulled back 3 inches, the sides cave in like a fishbowl, and none of the colors line up. I rebuilt the chassis once, and it 'fixed' the problem, but 2 months later it started doing the same thing. I replaced the flyback, etc. again and it didn't fix it.
I finally put another board I got in, tested working, in it...... same issue! So it's got to be either the yoke, or the tube, correct? I've never had a bad yoke, so I don't know what to really check out to see what's up.
I tested the impedence, I'm getting about 3.9 for horizontal, and 15ohms for vertical. That sounds about right to me. I also checked and don't see anything 'shorting out' near the yoke, and it's in the right position pressed up near the tube with the wedges still in place.
Any ideas?
I have a K7200 13" monitor in a game, and the screen started having serious convergence issues. It looked as if the Yoke had been pulled back 3 inches, the sides cave in like a fishbowl, and none of the colors line up. I rebuilt the chassis once, and it 'fixed' the problem, but 2 months later it started doing the same thing. I replaced the flyback, etc. again and it didn't fix it.
I finally put another board I got in, tested working, in it...... same issue! So it's got to be either the yoke, or the tube, correct? I've never had a bad yoke, so I don't know what to really check out to see what's up.
I tested the impedence, I'm getting about 3.9 for horizontal, and 15ohms for vertical. That sounds about right to me. I also checked and don't see anything 'shorting out' near the yoke, and it's in the right position pressed up near the tube with the wedges still in place.
Any ideas?
