Quote:
Originally Posted by vts1134
I don't know if it is apropos to this problem but the contrast control on this set seems more like an on/off switch. There is only three different settings- no video- weak contrast- good contrast. Other sets that I have are more of a gradual even ramping of the contrast level from no video to over driven.
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I'm turning back to this thought. I've scoped the video output of the set and it confirms this description. At one end of my picture control setting I have no video, as I turn up the control I get a gradual increase in signal but at about 1/3 of the way up the signal stops increasing. When I meter the impedance at the control itself I get the results you see in the video below. I am adjusting the picture control at the same rate for the entire time the video is being shot.
http://www.youtube.com/watch?v=jmCvh9sm0Wg
Would this point to a malfunctioning picture control pot?