[DavGoodlin]

Tim,
For the CTC36, look for the fold-out factory schematic in the RCA Color TV service manual you got from me. It is better than sams because the component numbers match the PW board labels.
The .01 cap you replaced may have been C608, which filters boost from rectifier CR606 by returning it to +280 volt via R618, a 1K resistor. This resistor also provides the screen voltage Check that 1K resisitor and try replacing CR606 - Im not sure you can really check the boost rectifiers but theyre all similar. See page 141 for text on the blanking circuit. As DaveWM said, the blanking diode CR605 needs checking. "Pops" tend to fry diodes.

The CTC53 IS a different animal alright, so a few items need checked to eliminate the easy stuff for the width issue.
The 31LZ6 Horiz output has a cathode protection via auxiliary thermal element in the set's circuit breaker, make sure the cathode voltage on this tube is less than 1 volt. Then check the 280v supply at pins 1 or 8 of the yoke plug.
next, see if the 130 volts at terminal T on PW400, where the tube is located, also check terminal BB (boosted boost) WTF that means, with a meter set on 1000 volt, you should see around 700 volts there. If this is OK, that clears your horizontal output stage. Last stop is the yoke...pull the plg and measure resisitance between pins 4+5, it measures the 4700 ohm 2 watt resistor in there.

I saw many of these as motel sets, no complaints since they kept us busy.

PS Nothing is better to do on bitter cold nights than this troubleshooting stuff...