David Farber wrote:
John-Del wrote:
On Tuesday, December 11, 2012 4:10:49 AM UTC-5, David Farber wrote:
I hit the

switch button again and the problem still stayed with the smaller
window.

The Sonys of that era used two tuners for main and pip, but didn't
swap the video between large and small windows, but swapped the
channel instructions for each tuner as the swap button was pushed.
That's why the problem stays with the particular screen window.

Those tuners were combo tuner and IF, and are known to have issues
with grounds and bad connections on coils. You can replace the pip
tuner if you can find one, or pull it and resolder. Some of those
TVs in that era used double sided boards, and require a decent
technique to pull the tuner (green boards). If it has the brown
board, it's an easy pull. BTW, although the tuners look identical
but they're not, so make sure to identify the correct one by pulling
the RF input lead off each tuner to confirm the pip goes to snow.

Hi John,

Knowing that the channel instructions are swapped instead of the
tuners does make this job easier. I'll be sure to mark the bad one
before I pull it.
Thanks for your reply.

I pulled out the tuner and resoldered it. There was nothing out of the
ordinary that I saw. A few of the connections were beginning to crack but
nothing I saw that would have caused a failure. Anyway, I put it all back
together and it's still going to snow at channels 48 and above.

--
David Farber
Los Osos, CA