Quote:
Originally Posted by ctc17
Hmmm, maybe its not in the color demod circuit at all. Maybe its something in the front end or some kind of interference.
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Decided to do some digging. The problem had by now got bad enough it was happening all the time, and tapping the side of the TV would toggle the color on or off.
Took the back off the TV, and started tapping things, trying to figure out what is turning the color on and off, and I noticed something.
The color control is connected to the chassis with a shielded cable, which terminates in two crimp on connectors. These connectors slide onto the top part of Zenith's terminal strips. The signal connector was slid nearly all the way off, and barely making contact. This connector is very close to the recently replaced focus divider, and I bet I knocked it when I did that job.
I tightened the connectors with some pliers, sprayed some contact cleaner, pushed them back on their respective terminals, and then powered up TV. Seems that tapping the tv now has no impact on the color at all. Time will tell if I fixed it, but it looks good so far.