Advice needed -
Can a TV degauss my magnet?
I had this Sony for a while, great condition, never really put it into rotation because of the very common corner of total fuckedness:
It's actual worse than it looks. It's not just the corner, the entire upper-right part of the screen sags down and it's super noticeable when scrolling or when a straight line/box etc. is on the screen.
I originally tried to fix it by placing a small ferrite bar magnet close to the yoke. I was able to fix the sag of the horizontal lines but introduced all kinds of other issues like a curl of vertical lines near the top and a bow on the right screen edge.
This weekend I thought I give it another shot and removed all magnets, yoke strips etc. and see if I can fix it for good. After some hours of messing around and experimenting I figured out placing a stronger magnet further away from the yoke did a better job. It gently moved everything up a little without introducing too many other issues. Stuff close to the yoke is good for affecting a single small spot like a bit of a corner, further seems to be better for my issue. Here:
(ignore some of the white tape, just added temporarily to mark location etc.)
After all that work geometry and convergence were looking decent:
Massive improvement and good enough for an FD Trinitron.
I then closed up the TV and gave it another go. To my great surprise, things were looking bad again. I opened up the TV, thinking I had accidentally dislodged something or the speakers in the back housing were causing issues etc. No luck, nothing had moved a millimeter and things still looked broken :/
Then it dawned on me that while adjusting the set I turned it on and off a couple of times to enter or leave the service menu, but if you do that quickly the degausser never fires. But it definitively had after turning it off for a while when reassembling it. If you look at the placement of my magnet, it's quite high and inside one of the two loops of the degaussing coil. I also noticed that when placing another new magnet directly where the installed one is my geometry mostly moves back to where it's supposed to be. Hm.
Do you think my theory of the TV degaussing my correction magnet is plausible? Can I just not place magnets that far away from the yoke, in the upper/lower area where the two coils on this set are placed?