Where's the issue(s) causing these

[TinCanAlley]

Originally Posted by andy

The first issue is some geometric distortion. If the set has a pincushion phase adjustment, it should help, but many sets don't have an adjustment.

The second issue is caused by high frequency luma information getting decoded as color. It's unavoidable on a TV without a comb filter to separate the chroma and luma from each other. You can reduce it by rolling off the video bandwidth, but you will lose fine detail.

The real question is how does it look when viewing normal video? These older sets almost always look shockingly bad when viewing certain test patterns. It's just a fact of the limited technology available at the time. Old TVs are fun to restore, but don't expect to get the same picture quality as a modern set with a digital comb filter.

Forgot...the set does have a pin cushion adjustment. It's on the bottom of the chassis, so is it okay to adjust it while the set is on its side?

[andy]

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[TinCanAlley]

Originally Posted by andy

Pincushion shouldn't be affected by having the set on its side, but you'll have to ignore the purity.

Found the pincushion coil on the bottom side of the chassis. They put a hole on the bottom of the cover, but it's too small to get the tool thorough. Go figure.

Anyway, I managed to get the drooping upper left back to pretty much level with the right side. Too much adjustment made the right side change and same with the bottom. It was a compromise, but it looks so much better.

Thanks!