Hello everybody! After a lot of work and even more study at the schematic diagram (which was really not easy...) I finally discovered what the problem was with my Zenith "pal modified" 24MC32,model 5304U (The Buchanan). I changed the cristal quartz (4,43Mc) and the odd colors left finally place to more normal colors. I then grounded pin 2 of the 4,43Mc and then I tuned the reactance coil for steady color bars. The results were amazing especially thinking it is a tv more than forty years old! Ok, there are more things to fix, the focus control must be set fully counterclockwise to get a decent picture, there are few retrace lines on top of picture and the hue control must be set to its position were you normally get pink colors to achieve normal flesh tones.
Here are few pictures of the set...
I must admit I'm really happy!
