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Hi - "Chuckles" the TV restorer here--
Today I put in the contrast control fix (see attached diagram). However, I didn't study it very carefully and just wired it as shown. If you pay attention, you will see that this reverses the action of the contrast control, so max contrast is now counterclockwise. I plan to leave that way, as the chassis is very crowded in that area, and completely disconnecting and rewiring it seems like asking for trouble.
The contrast control now acts like it should, without the huge shift in DC level - should be much easier to set up and adjust the background controls now.
A second look at the color controls inidicates that the hue is not centered - more work.
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