This is prof positive that the color circuits of your TV is working.
http://videokarma.org/attachment.php...9&d=1669302177
color with direct input.
I had the very same problem a few years back with my CTC-16XL.
After I spent a VERY long time getting the color circuits working again after some putz messed it all up, and I had to use direct input to do so, I still could not get stable color via the tuner cause the IF was all borked because it was messed with was very obvious as the shield for it was missing.
A telltale sign of messed up IF is getting good BW but crappy or no color, why it does this is complicated, but it has to do with how they took the normal BW video standard and crammed color info into it and still had it compatible with older non color sets.
And most of the time there is no fix other than alignment,because otherwise the color info will be corrupted by the time it gets to the video amp, even if you get a semi good BW video.
Even on my CTC-16XL I was not able to clear up the IF as good as it should be, it's like 85-90% and shows red smear, and thus I have installed bypass signal relays in the A/V lines and can change from tuner to direct input at a flip of a switch.
perhaps someday If i ever get a sweep marker generator, i may attempt to bring it up to par.
but for now, it's really good with direct, and fair with tuner.