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If you can't get the vertical to stop rolling with the hold control, (with the sync pulse disconnected) it seems as thought he vertical oscillator is off frequency. You should be able to get the picture to get close however, it needs sync to lock in.
You might check the capacitors in the oscillator circuit to be sure the correct value is there. Also, resistors for one that may have gone high in value or maybe one that was replaced with a value that is 10 off (Like 270KΩ instead of 27KΩ or .01 ᶙFD instead of .001 ᶙFd).
Just a thought. I realize how maddening it is!
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03-24-2017, 07:06 AM
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