Zenith roundie centering

[mattdavala]

Hi!

My chassis is a 24NC31. Its a 66 model. There is about a half inch space at the bottom of the screen and would be cured if I could get the screen centered vertically.

This set uses "centering strings". I see them, on on top and bottom of the deflection yoke. I think I am using them right, by pulling one end of the string. No effect on the screen at all. Without pulling the deflection yoke off can anyone tell me how these strings are attached inside and why they are not responding?

Also, my focus is at the extreme end of its range. Do these high valued resistors go bad in the focus section?

Thanks!
Matt D