vertical lines in a Toshiba TV

[zeno]

A few things just in case.
Sams wave forms show 2 complete lines or frames.
The little isolation PS runs off the FBT. Check its filter cap.
Watch the lead dress, if to close to FBT it can cause this.
Remember cathodes high = dark pix, low =bright pix.
Scope should show a damped ring , refreshed (ping) at start of every hoz line.
That should show up on scope. Like I said it almost has to be there !
Also remember there are 2 or 3 grounds in this set.
AND since you re-capped check the polarity & value of every cap ! This is why
in most cases repair first then change a few caps & retest & so on.....

Zeno

[vol.2]

Originally Posted by zeno

The little isolation PS runs off the FBT. Check its filter cap.

I'm not sure which one you mean. Which pin on the flyback is isolated? 162V (pin 10)?

[zeno]

FBT pulse goes to T501, rectified by D501, filtered by C502.
Note some of the ground symbols are different. Gotta use the right one when measuring.
MOST of the set uses one hot GND. If the set was newer it would
probably use a SMPS and that would add a GND. But with those
the chassis GND is cold.

Zeno

[vol.2]

Originally Posted by zeno

FBT pulse goes to T501, rectified by D501, filtered by C502.
Note some of the ground symbols are different. Gotta use the right one when measuring.
MOST of the set uses one hot GND. If the set was newer it would
probably use a SMPS and that would add a GND. But with those
the chassis GND is cold.

Zeno

Ah! Okay, yes, I know about that. That's what I meant when I said the AV input. It's isolated by a optical input chip and then it uses T501 for its power I guess.

I did replace that filter cap, and I can't see any garbage in that circuit.

As far as I can tell, it's not in the video. I can inject and RGB signal into the Jungle IC and completely blank the video signal and the bars are still there