has this chassis had a cap kit.
if not it needs one to look it's best.
try adjusting your 50/60 htz pot.
first center your V-size and V-position pot then adjust your 50/60 htz pot.
and finish the adjustment with your V-size and V-position pots.
with this combination you can get the best image that the chassis will do.
there are many K7000's that need this adjustment done and even then will never adjust all the way up.
why i do not know but it is one of the few quirks that theses chassis have.
also check out my youtube channel for monitor repairs i have done.
https://www.youtube.com/user/buffett1978?feature=mheePeace
Buffett