glen65
Newbie level 2
rca atc113 chassis
I am working with an RCA model 32F530T TV.
The chassis number is ATC113-CD4.
The unit makes a constant chirp noise when plugged in.
I checked it out and found that the horizontal output
transistor was shorted, its a 2SC5148 with no internal
damper diode. I checked the surrounding components
and solder joints all appear to check ok. I replaced the
transistor but when plugged the unit in it popped the
transistor and started chirping again. I was searching
through the forum and found a thread that talked about
a coil in series with the Base lead of the HOT, and how
the glue that they used on it could be at the root of the
problem.
https://news.elektroda.pl/rca-ctc203ca6-squeals-t879.html
I pulled the coil out of the set and attached a pic of it to
this thread.
Is the glue being referring to in the old thread the red blobs
on top? Or is it not present? Or is there something
completely different that I should be looking at?
Any help appreciated
Thanks
I am working with an RCA model 32F530T TV.
The chassis number is ATC113-CD4.
The unit makes a constant chirp noise when plugged in.
I checked it out and found that the horizontal output
transistor was shorted, its a 2SC5148 with no internal
damper diode. I checked the surrounding components
and solder joints all appear to check ok. I replaced the
transistor but when plugged the unit in it popped the
transistor and started chirping again. I was searching
through the forum and found a thread that talked about
a coil in series with the Base lead of the HOT, and how
the glue that they used on it could be at the root of the
problem.
https://news.elektroda.pl/rca-ctc203ca6-squeals-t879.html
I pulled the coil out of the set and attached a pic of it to
this thread.
Is the glue being referring to in the old thread the red blobs
on top? Or is it not present? Or is there something
completely different that I should be looking at?
Any help appreciated
Thanks