I own an RCA Colortrak Model# F27678BC which has chassis# CTC187AJ.

Problem: No chroma. The screen menu color is fine but the picture is B&W
only. The picture is sharp and has good contrast otherwise.

I am fairly comfortable with my soldering technique and was wondering if
this might be a simple repair. Any photos, schematic or wiring diagrams
would be helpful.

I'm open to taking the unit to a repair facility but the closest repair shop
is 3.5 hours away. I live in rural Maine so any help would be greatly
appreciated.

Thanks in advance!
Jim Desrosiers