colors change

[Electronic M]

It could be that your color osc. is loosing synch. I have a Silvertone that looses color synch sometimes and has diagonal color stripes going diagonally across a perfect monochrone picture.

[Don Lindsly]

Check purity and B & W for entire screen area. Make sure the B & W looks good over the entire screen, at all brightness levels.

Make sure the CRT guns all track, before digging into the color circuits. Then put a color bar generator on it and see if the bars are consistent from top to bottom.

[timmy]

Originally Posted by Don Lindsly

Check purity and B & W for entire screen area. Make sure the B & W looks good over the entire screen, at all brightness levels.

Make sure the CRT guns all track, before digging into the color circuits. Then put a color bar generator on it and see if the bars are consistent from top to bottom.

hi mr lindsly i have been communicating with bob gatarz from new jersey on a possible flyback problem on a ets908 chassis motorola he will be sending you a message. this set has low hv,14kv bright down, 11kv bright up and the center coil gets very hot, not the donut, the coil in the center of the donut and i have run out of options aside from thinking the fly is bad. there is no burning smell just very hot after about an hour.cathode current should be 105 on each tube and together should be 210ma but its at 238ma and cannot get it lower.do you have any suggestions as to where i should look at this point.caps were changed, tubes check out, and did the tests to get the hv to rise and it wont. cap off 6bk4,focus tube out, crt plug off nothing will raise the hv.i had twisted lines on the left screen and found a resistor in the yoke that was bad and changed it and cured the lines but this resistor gets HOT and the old one showed it got hot as well. i dont know if this yoke resistor has anything to do with whats going on with the hv. thank you

[Jeffhs]

I had a 1964 Silvertone color roundie, like Electronic M's, that would lose color sync occasionally; however, on mine the color stripes were horizontal, not diagonal. I was able to get the color to lock by rapidly turning the tint control from one end of its rotation to the other. Never did find the actual cause of the trouble. All I knew was that the 3.58-MHz color burst oscillator was out of sync with the station signal; however, why rotating the tint control would bring it back in sync is a mystery to me even now, almost 40 years later. That set had several other problems besides, such as a hum bar that would float upwards through the picture, bad convergence I never did get right (I didn't have a generator at the time), and so on. Finally had to junk it when a tube socket broke out of a PC board.