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Phil,
Although I'm not overly familiar with sets earller than CTC-12, I'm assuming the following 'quick & dirty' check is valid for your CTC-4 as well:
While watching the colorbar display as shown in your post# 138, rotate the color control thru its full range, from zero to maximum, a few times. Does that greenish component vary in intensity, extinguishing completely at the zero setting? If so, it indicates the chroma signal amplitude is being displayed, but without the local phase reference signal. In other words, the 3.58 oscillator is not running.
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