Update: I finished replacing resistors and capacitors that measured bad in the horizontal and high voltage circuits. I have replaced all of the high voltage tube sockets as there may have been a possible HV shorting issue. I also added a 250ma fuse to the horizontal output tube.
The TV starts up, I get audio and the screen lights up but as before the horizontal output tube current slowly rises and eventually pops the fuse. I tried several times to fiddle with the horizontal hold and horizontal efficiency but in all cases I could not get the picture to hold and eventually the horizontal output fuse would blow. The HV does rise starting at 23k volts up to about 25k volts before the fuse blows.
Any ideas or what to check next for why the horizontal output current rises?
Voltage measurements:
- 23-25k HV source set and initially measured 23k volts
- 390v source measured 409 volts
- 275v source measured 312 volts
- 1000 boost measured 871 volts
- 810v boost measured 819 volts
- -46v Horizontal Output tube grid (pin 2,6) measures -50.6 volts
TV image:
