Thread: Zenith 2250R
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Old 09-13-2018, 08:45 PM
Kevin Kuehn's Avatar
Kevin Kuehn Kevin Kuehn is offline
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Join Date: Jan 2011
Location: WI
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Quote:
Originally Posted by Zsuttle View Post
That explains a few things, the horizontal oscillator was at 15.35khz instead of 15.75khz listed on the service manual. This might be a stupid question but what exactly gets adjusted? Do I adjust the master oscillator? Or is there an individual adjustment for the horizontal oscillator?

Sorry for all of the questions, still a newbie at this
~Zach
The only horizontal frequency adjustment you have on this set is the horizontal hold control. Can you see the horizontal frequency change when you move that control to its extremes? I agree with Electronic M that you should see a raster even with 7.5kv. I'd try rotating the Ion trap around the neck and also forward and back in a dimly lite room, in hope that a hint of light shows up. Then the idea is to get it to the position where the screen is at it's brightest. Once you see any light, turn down the brightness and keep trying to bring it back with movement of the trap. Since you've had the CRT out there's no telling how far it's been moved from it's former working location.

Last edited by Kevin Kuehn; 09-13-2018 at 08:53 PM.
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