Yeah this JVC has some relatively bad fish eye effect going on (linearity). I don't notice it in fighting games and it looks decent at a cross hatch. Side scrolling games it is pretty bad.I adjusted a few service menu numbers making sure to write down og numbers to improve it a little bit. From a quick google it seems someone had the same problem and a recap fixed 99% of it. I assume the deflection area probably needs a recap but im a newb.
At least with my wegas the linearity was only on vertical movements on one side (KV-27FS100). Corners are pretty fuzzy, more than they should be. One thing to keep in mind is that this tv was moved around a lot and is one of the first jvc d-series. It also belonged to a retired army couple who could have used it a lot. I plan to pick up a few more eventually, would love to get a 32" one.
Shitty pics below
Geometry of AV-27D201. A little bit of squigglyness on the vertical lines if you notice.
Geometry of Toshiba 27A60. Kinda cool they are both thomson tubes. Geometry is pretty spot on all things considered. No color bleed. I don't notice any linearity issues when playing horizontal or vertical games. Corner sharpness is pretty good, I just need to make some convergence strips for the corners one of these days.
Overall the jvc is nice but the one problem I can't seem to fix other than the fish eye is massive color bleeding. Even at default contrast and color it still bleeds on all colors, most notably red through component. Turning up contrast and keeping color at 45/100 it bleeds more with contrast. S-video doesn't really seem to have this problem. I can put the color at default and contrast as high as I want and it won't bleed.
I don't mind recapping it but It would be cool to know exactly where to recap instead of shotgunning. With this in mind I can't find the service manual anyhow so I would have to manually make a cap kit when there is like 150+ capacitors lol. Model number is jvc AV-27D201. The only service manual I found just has schematics.