Magnavox Windsor Imperial - TV Help

[gdubbs]

thanks Zeno! Definitely stable, just crushed vertically. Looking at the original picture, its almost like the crush is not linear. its crushed more at the bottom than the top?

Looks like there are a few high ohm resistors near the vertical tube. I'll check them out when the new ones arrive.

Best, Greg

[zeno]

The vert out has 3 electrolytic caps C3B, C1C & C1B involved. Double
check them & the wiring. They do not go to ground as normally done.
They can cause the bottom to "pull up" & throw off the vert lin.
Also look into the negative 85 line.
Thats as far as I can go. The power supply is cut off in the schematic & none
of us can get a scroll bar to move it. All my fault for not being a
computer head !

73 Zeno
LFOD !

[gdubbs]

Thanks y’all for the guidance! After replacing all the caps once before, four resistors were the key. Three of the resistors were >1 mega ohm.

It’s been so long since I’ve manually tuned an analog crt that it’s hard to determine if things are operating normally. I notice when adjusting the contrast, that the picture will go askew. Normal?

Again, thanks! Greg
.

[old_coot88]

Originally Posted by gdubbs

I notice when adjusting the contrast, that the picture will go askew. Normal?

.

Yes, in older designs where the "contrast" pot controls gain of the IF strip. In newer designs, sync is taken off ahead of the contrast control, which controls gain of the detected video signal.

[gdubbs]

Thanks!