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Originally Posted by Adam
I stayed up late last night and changed the electrolytics. The picture is full size, but it is still all green. There is a little blue, but no red at all. I checked the 21FJP22 again, and all 3 guns are good. I tried the setup mode, all I get is a 3/8 inch thick green line, even with the green turned all the way down and either red or blue or both all the way up. I tried to put a color bar generator on it just to see what would happen, it was all green, but what was interesting was when I turned it to show the crossed lines, it would show me the white lines (becuase of the little blue it has), but the background which should have been black was all green. And this is with the green screen and drive controls set all the way down. The brightness control, tint control and color control have almost no effect on the picture at all.
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Adam,
I'm not an especially technical type but do refer to my trusty book " Coor TV Servicing Made Easy." 1964 edition. Your CTC-15 chassis is somewhat similar to the CTC-12 so this may help.
Check #2 in the following list, this may have already been addresed.
The CTC-12: "No Color"
1. Check color killer adjustment.
2. IF THE 3.58 OSCILLATOR STOPS, THE COLOR WILL BE VERY WEAK, AND ALL AREAS THAT ARE SUPPOSED TO BE IN COLOR WILL BE GREEN, iF YOU USE THE COLOR BAR GENERATOR, ALL BARS WILL BE GREEN AND THE TINT CONTROL WILL HAVE NO EFFECT.
3. Check the bandpass stage, in the usual way, for bad tubes and wrong voltages. For shop repair, tune in a keyed color bar generator and follow the chroma signal through the various video and bandpass stages with a scope.
-Steve D.