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Does your pattern gen have a means of switching off the chroma when bars are on screen? If so you can probe the band pass amp or demod driver to see if the chroma signal is getting though, switching chroma on and off while you probe gives you a way to make sure you're not just looking at noise. If it isn't getting through, you're probably looking at a slope adjustment to the IF at the very least because the 3.58 has likely slid off to one side and is not being seen by the set anymore.
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This is it right here.... Replacing every cap means all tuned circuits need re-alignment.
Chances are each tuned circuit has moved it's center up or down, and as
a unit, is just rolling off before the chroma part and attenuating it..... Easy
fix, but yes be sure everything else is ok....
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