[Yamamaya42]

Originally Posted by Username1

Good Morning!

I think you should try setting a goal of fixing this tv before this thread hits 60 pages!

Anyway.... Since you have that tuner subber, and it puts out TV type IF signal,
I think you should take the signal that comes out of it, and make a nice little
poker probe, with a coupling cap of course, and poke it around in the IF section
and see if you can narrow down where it works and where you loose it....
You did that video injection at Test Point 'B' a few pages back, so why not
take that IF signal from the tuner subber and poke it into each of the 3 IF
stages and see what you get...?
Don't forget to ground the ground part of the output cable, then just turn
the center wire into a capacitor coupled probe....

Aim for the G1's of each stage, put up some screen shots

1. no signal anywhere,
2. 1St, IF right at G1
3. 2Nd IF right at G1
4. 3Ed IF right at G1.

Naturally the signal will not be strong enough to produce a picture as you
get closer to 3ed IF, but the signal is what those circuits are tuned to
respond to, so I think it's your best bet to see at what point you might be
loosing your juice at...

Oh, and congratulations, your tuner subber is now also an IF section analyst
you can rename it later......


..

in order to do that, you need to put the chassis in the " service position " as seen here.
http://suzaku.live-evil.org/0417191838b(1).jpg

OR pay way too much for a tube test socket like this
https://www.ebay.com/itm/36352391049...N2AYQ&LH_BIN=1