Fixing CRT Convergence and Geometry.

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TetsuoXLI
Posts: 52
Joined: Tue Jan 04, 2022 7:07 pm

Fixing CRT Convergence and Geometry.

Post by TetsuoXLI »

I have a few pictures of my TV with 240p test suite. I was wondering if anyone could help me fix the many probles with this TV's picture.

https://imgur.com/a/bWf4b1P

It's clear that the yolk needs adjusting. I've been watching Retro Tech's videos on this kind of thing but I wanted to ask if someone could walk me throught the steps to making the picture as close to perfect as possible.
tongshadow
Posts: 688
Joined: Sat Jan 07, 2017 5:11 pm

Re: Fixing CRT Convergence and Geometry.

Post by tongshadow »

Only BVMs and High-end PC CRTs can achieve something close to perfection. Working on common CRTs always means you'll have compromises, specially at the edges.
The discoloration could be just a magnetic issue, a degaussing wand could be able to fix it.
The wonky lines seems like bad capacitors, someone had the same issue on a PVM and fixed it by replacing the caps.
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Josh128
Posts: 2246
Joined: Thu Jan 16, 2014 9:01 am

Re: Fixing CRT Convergence and Geometry.

Post by Josh128 »

Man, your asking for a lot, lol. Nobody is going to type up a walkthru for you here, because all the information for general dynamic convergence adjustments are available on the net. There are many, many articles / posts. Google and see which one you like the best.
TetsuoXLI
Posts: 52
Joined: Tue Jan 04, 2022 7:07 pm

Re: Fixing CRT Convergence and Geometry.

Post by TetsuoXLI »

I realize that a consumer television or any CRT for that matter can't be perfect: I just want to make it as perfect as it can be. Thanks for the direction. I'll start by replacing electrolytic capacitors. The service manual for this TV doesn't have an extensive parts list that includes electrical components. I'll just look at all the capacitors themselves.

Should I be worried about some capacitors needing very specific specifications that only a parts list would show?
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