CTC203, Audio But No Video, Fixed (Thanks to Some Help From Y'all)

[£¢$¥]

Based upon inputs from David, Art, and Jason D, I went back and looked at
this RCA CTC203 chassis which was giving me lots of audio, but the video and
high voltage section was dead. I had traced the problem to no signal (or a
very attenuated signal) at the base pin of the HOT. I originally thought my
problem was due to transformer T14301, but I went back and looked more
closely at L14401. I had previously overlooked this coil because this set
had been worked on before and supposedly this coil had been replaced.

Anyhow, I removed the coil and lo-and-behold, there was indeed a lot of
hot-melt glue underneath this component. Using my trusty 20 Watt soldering
iron, I melted, burned, and scraped away most of the glue, then used a
dental pick to poke out the stubborn remainder which was stuck in the
through-holes. Re-installed the coil (L14401), re-soldered it in, fired up
the set, and suddenly there was video!!

I suspect that the original rework done on this set consisted of touching up
the solder on the bottom side of the board and that the coil never was
actually replaced.

Anyhow, thanks for your wisdom and taking the time to respond to my
questions!

Sincerely,

Horatio (in San Antonio, Texas)

 

[Jason D.]

Based upon inputs from David, Art, and Jason D, I went back and looked at
this RCA CTC203 chassis which was giving me lots of audio, but the video and
high voltage section was dead. I had traced the problem to no signal (or a
very attenuated signal) at the base pin of the HOT. I originally thought my
problem was due to transformer T14301, but I went back and looked more
closely at L14401. I had previously overlooked this coil because this set
had been worked on before and supposedly this coil had been replaced.

Anyhow, I removed the coil and lo-and-behold, there was indeed a lot of
hot-melt glue underneath this component. Using my trusty 20 Watt soldering
iron, I melted, burned, and scraped away most of the glue, then used a
dental pick to poke out the stubborn remainder which was stuck in the
through-holes. Re-installed the coil (L14401), re-soldered it in, fired up
the set, and suddenly there was video!!

I suspect that the original rework done on this set consisted of touching up
the solder on the bottom side of the board and that the coil never was
actually replaced.

Anyhow, thanks for your wisdom and taking the time to respond to my
questions!


Horatio (in San Antonio, Texas)

Bravo!!!

See? That would be called a call back bec that previous shop did not
remove that offending glue like you did. This TV should do fine for
looong time. Did that tv was at shop before this year or last year?

Oh, be glad you did right away because in time customers didn't take
them in right away usually end up with blown horizontal transistor or
have blown power supply because it was left plugged in whining away
trying to drive power through shorted horizontal transistor to ground
till power supply blew. All this is not expensive to repair.

RCA TVs is good to have, decent tube life. JVC uses many RCA tubes by
the way.

Cheers,

Wizard