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Look for an intermittent in the area of the 3.58 reference oscillator (V20). If the osc. is not running, the chroma signal is displayed only as green. Since you occasionally get a 3 color barberpole, the osc. is starting intermittently and out of sync.
Check especially around the reactance coil (L29). Since this coil sticks up pretty high it tends to get bumped a lot and any open condition there will kill the oscillator. (This coil is the color sync adjustment also.)
Last edited by old_coot88; 07-07-2021 at 06:12 PM.
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