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Originally Posted by vts1134
...I'm almost positive that it isn't the IF.
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That's a correct assessment. The absence of any appreciable ringing or smearing-out of fine detail in the pic would rule out misalignment of the IFs.
The problem is almost certainly in the video chain. Have you checked the peaking coils for continuity? Looks to be eight of 'em sprinkled from the detector and the CRT.
If they're all good, injecting with your B&K point by point thru the video chain (attenuating as necessary) oughta spot the problem.
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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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That sounds almost like the control is cruddy/scratchy. If you have an analog ohmeter, check to see if it runs smoothly from stop to stop without drop-outs or jumpiness.