Re: What is this clicking in the color tv?

On Sat, 17 Feb 2007 22:30:08 GMT, James Sweet <jamessweet@xxxxxxxxxxx>
wrote:



Sounds like you have a shorted semiconductor somewhere causing the power
supply to shut down. Check the horizontal output transistor first.
Diodes in the power supply are another suspect.

Is there any chance that replacing the bad horizontal output
transistor will get me the voltages I need, and cure the clicking,
even though it clicks with the H.O.T removed?

I don't like just replacing parts without being sure I have found the
root problem, but I'm lucky with your help to have found this, let
alone other problems. I don't know how to trouble shootwhen the set
is not running at all, or without replacing bad parts when I have
found them.

If so, it's going to be days or weeks before I have time to get the
part and put it in.

I realize I'm just not very good at this, for this sort of reason.
It's confusing. I did learn that at least in tube tvs the horizontal
output circuit provided the high voltage that was used all over the
tv. I never learned if transistor sets are the same.


Even though I found a few google hits for a D1398, including a spec
*** and a company that sold them, I also found an article in google
groups from this very newsgroup back in 1996 where JohnSon replied to
Michael Portmann, and Michaal asked about a 2SD1398, which was also a
horiz. output transistor, and JohnSon referred to it two ways, as a
2SD1398 and as aD1398. So I guess they are the same? He also
suggested as a substitute an ECG2302. That should be easy to get.
Well, Mouser has an NTE2302. The local electonics store in Baltimore,
Baynesville Electronics, is usually pretty expensive, and there is no
rush.



If you are inclined to email me
for some reason, remove NOPSAM :-)
.

Loading