Lets keep in mind what seems to be going on.
It seems when cold the pix has lots of lines.
This IS the hoz osc off freq. No question........
I assume as it warms there are less lines then the pix
comes in but is trying to float side to side & is very touchy.
First thing is to get the osc stable. Its probably a cap but
check all the resistors also. You can use freeze mist on the
caps. Just a little on one at a time. Too much can cause a
good cap to drift. After it warms back up move to the next cap.
After you get the osc stable if its still trying to move side to side
start checking around the diodes. Also there is a sample pulse
coming from the flyback to the phase ckt. Check that, resistors
are often stressed there.
If you can also post the hoz part of the schematic, a big help !
73 Zeno
