[Chad Hauris]

Try adjusting the color intensity control...if the chroma signal channel is working you will be able to vary the picture from straight black and white at the minimum of the control to a purple or green hue at the maximum.
You will need the 3.58 mhz oscillator signal to get actual colors and the burst signal to get it in sync.
If you have a scope I would check out the signal at the 3.58 mhz oscillator tube and see if a signal is being produced. Check the grid of the 3.58 mhz oscillator section and check the negative voltage against the schematic. As I remember you should have about -7 volts if the tube is oscilating.
Also check out the 6JU8 phase detector circuit if the set uses this tube.
If the 6EW6 plate voltage is high this means the tube is not drawing current...check for open components in cathode circuit and that the screen voltage is normal.