No color on an RCA CTC-16

[Jon F]

Hi, I have had a CTC-16 for little while. When I first got it, it worked poorly and had no color. I checked all tubes, replaced some, and replaced the electrolytic capacitors. Set worked better but still no color. Today, I went and replaced all of the paper style capacitors. Set works even better but still no color.

Color killer control on the back, and the color control on the front have no effect. I have messed with the fine tuning and not even a hint of color. Next step I think I will replace the crystal, then maybe start checking resistors on the color board.

Any thoughts? Anything I am missing? Thanks!