Fantastic job figuring that one out Mike. I remember back to my childhood we used to watch a 25-inch color Console RCA TV I remember it was about 1974 model and this was growing up in the late 80s, the TV picture was stretched vertically and when I was a kid I started getting into electronics so I was able to adjust down the vertical height on the back, however it got to the point where it's so stretched out that you could visibly see the vertical lines from the couch. Watching football was a chore for my dad. Knowing now it could have just been a simple resistor issue that went out of spec. Eventually it got to the point where it would fold over on the bottom and then it died which got replaced by a 32 inch Sony
Merry Christmas Mike. You just gave me the answers to my 2 biggest questionmarks about crt's with these K7000 videos. No tech could or would give me an answer if there are tweaks for vertical and horizontal size. I have 3 basically new crt TVs (maybe a few hundred hours of runtime) with nice samsung tubes and the chassis they used has basically no controls outside of the service menu and the h size setting does not to do anything. With these fixes I can finally put those in a Arcade cabinet.
Oh man, you just saved me. I have a 25" K7000 doing the same thing and I was losing my mind trying to figure it out. Mine had what looked like an original 1/4 watt resistor at R80 so I didn't pay it any attention. Turns out it's at 2.7ohm and was the cause of my issue! Thanks Mike!
Thanks for sharing. Appreciate it. I'm familiar with changing the values of r83 to lower or raise the vertical position if the vertical position pot does not provide enough movement but I don't think I recall any tips about r80 and vertical size. Now I know and knowing is half the battle.
