Quote:
Originally Posted by Findm-Keepm
Q3301, the +12V regulator will fail, giving white screen and retrace lines. Intermittent at first, it could be your problem. RCA issued a Goldenrod of common CTC101 chassis problems - I'll see if I still have it.
Also, check the spark gaps at the CRT socket - flush them out with some Isopropyl (80% or better, not "Rubbing Alclohol") - the dirt will get conductive and lead to CRT bias issues, affecting the pix, including intermittent retrace lines.
Pin 5 of the CRT socket likes to get a cold solder joint - mentioned earlier, check all the connections to the CRT socket.
Also, a small coil on the CRT board was prone to opening up, but that would cause your problem all the time - might want to check the solder connections there too.
Cheers,
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Findm-Keepm,
Thanks for the additional info and areas to check out! I plan on giving that CRT socket and board some attention tomorrow and will clean the spark gaps as you suggested and also check for cold solder joints. Q301 ( power transistor) 12v power regulator, - thanks for that one, I checked it out on the schematic and will put on the list. If the problem isn't solved on the CRT board/socket, then I will pull the chassis and change a few things as described on this thread. Many thanks! If you find that RCA bulletin for this chassis, I would love to read it.