Bad yoke

Skratcher

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I'm not getting any reading on the horizontal on this yoke. Screen is collapsed into a dot.
I've inspected the windings for something broken or corroded but nothing sticks out to me. Reflowed the solder joints. Anyone have any suggestions?IMG_2593.jpeg
 
I'm not getting any reading on the horizontal on this yoke. Screen is collapsed into a dot.
I've inspected the windings for something broken or corroded but nothing sticks out to me. Reflowed the solder joints. Anyone have any suggestions?View attachment 839533
Usually when yokes fail, they fail at the sharp winding bends.

And they leave a sign - usually a black mark or missing insulation.

Since you aren't reading the horizontal, I'd look hard at where the horizontal winding gets terminated. It may have separated there.

I'm don't see any blowouts, but the picture is from one face of the yoke, so flip it and take more pictures so we can see what is going on or not.
 
Usually when yokes fail, they fail at the sharp winding bends.

And they leave a sign - usually a black mark or missing insulation.

Since you aren't reading the horizontal, I'd look hard at where the horizontal winding gets terminated. It may have separated there.

I'm don't see any blowouts, but the picture is from one face of the yoke, so flip it and take more pictures so we can see what is going on or not.
IMG_2594.jpeg
Meant to post this pic the first time - was very dirty, I dry brushed as much dust off as I coukd
 
Could you try some cleaning in the areas circled? You can add some water to your brush to try to dislodge the dirt.

1755202384268.png

The darker spots could be heating damage.

1755202424668.png


This is what I mean by "sharp bends" Look in these areas for anything where the insulation looks missing or there is a black spot.
 
I inspected this closely for a while and found no breaks in the winding or burns in the winding. Looks like this might be a lost cause at this point.
 
100% sure there's no resistance across these points? Scratch the solder with the tip of the probes.

IMG_2593.jpeg
 
Usually when yokes fail, they fail at the sharp winding bends.

And they leave a sign - usually a black mark or missing insulation.

Since you aren't reading the horizontal, I'd look hard at where the horizontal winding gets terminated. It may have separated there.

I'm don't see any blowouts, but the picture is from one face of the yoke, so flip it and take more pictures so we can see what is going on or not.
Or you will get double the resistance is usually more common if no signs of burnt marks etc
 
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