Problem Toei TC252S with Toshiba Tube

jerryspaghetti

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Seriously technical but good points raised above.

The tube is in otherwise really nice condition. The original chassis had no signs of impact damage. The neck board, yoke etc were very dirty but without cracks/dents or any signs of taking a hit.

I’m going to give the neck, yoke and ring assembly a very delicate but thorough clean with isopropyl over the weekend as there was very thick black dust over everything.

The white marker line on the rings is still clear so I lined them up back to factory position and no real improvement. Tried sliding rings nearer/further along neck and rotated around neck to see what effect but still have the ultimate issue of the green grid being smaller than the blue and red. The corners can be pulled around a bit with convergence strips but the critical problem is that green grid size throws everything off.

Need to locate someone nearby with the same monitor that doesn’t mind me testing my chassis on their known working tube, just to 100% rule out any issues with the chassis and also to get some hi res pictures of the yoke/ring positions on the neck.
 

jerryspaghetti

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Nothimg wrong with that chasis

Your welcome to try it on my tube bud,


View attachment 37648View attachment 37649View attachment 37650View attachment 37651

These might help you 😉
Thanks man, I know you’re right. The chassis is fine. Kind of rather it was the chassis as at least that can be fixed. This tube business is a ballache. Where do I even begin to get that fixed?! If it’s even repairable which I’m starting to worry it’s not.

Isn’t that a Hitachi tube in your pics?
 
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Retroman839

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Thanks man, I know you’re right. The chassis is fine. Kind of rather it was the chassis as at least that can be fixed. This tube business is a ballache. Where do I even begin to get that fixed?! If it’s even repairable which I’m starting to worry it’s not.

Isn’t that a Hitachi tube in your pics?
Yes it’s a hitatchi u4 same a yours ,,,

gotta be the rings or yoke has moved.

Does your yoke still have the glue on the wedges?image.jpg

I have had this yoke off
You can see where my hands have been
 

jerryspaghetti

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I may have uploaded the wrong yoke picture. Will check tonight!

Pretty sure the deflection cables are exposed on the Toshiba tube and don’t have that plastic cover like the hitachi tube
 
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