"James Sweet" wrote in message
news:ldxJe.4051$2j.2446@trnddc07...

"JM" wrote in message
...
I've been able to improve the focus on my Sony CPD-G520 by carefully
adjusting the pots on (what I think is) the flyback. I can get the
picture
quite nice and sharp, but it always seems to be off a little bit the
next
day. I'm wondering if I need to put something on the heads of those two
adjustments to lock them in place once I find the best setting... or if
there's another problem that's causing the focus to be inconsistent.

Any thoughts?



There's another problem causing it to drift, it can be a bad flyback, a
problem with the tube, or some other problem.



James is probably right, but I'd lock it anyway (e.g. use nail polish
lacquer), it won't hurt and would provide a definite answer your question.

Barry