My Gunsmoke screen died. I grabbed another chassis I rebuilt and tossed that in. The picture is super bright even with the Flyback screen pot turned all the way down. I pulled the new chassis and checked a bunch of the suggested components:
C107 on the neck board
Resistors R515, R516, & R517
I decided to try the new chassis on another CRT…it works great.
I pulled out my Sencore and tested the original tube and everything checked out fine, no shorts, good emissions, etc.
Kinda unsure what to check next. Any ideas?