7904 excessive shadow/flare
I've just repaired a 7904. Usual problem, SMPS not working.
Then I've checked all voltages, HV voltages, etc.. all it's fine, very good.
Just some adjustments to Z board, focus and so on.
The scope is in very good conditions, the trace is well defined, bright and sharp.
But there is an annoying problem that I don't think is normal.
It is the usual shadow / halo / flare effect but while in my two 7854s and 465s that already own this effect only manifests itself with somewhat high brightness, in this particular 7904 with low/normal brightness the halo/flare effect it is already visible and definitely annoying.
To give an idea I took a picture that you can see at
I reiterate that the photo was taken with the intensity controls were set for a normal brightness even if in the photo it seems that the brightness is too high.
I've compared side-by-side my 7904 with my 7854 (they should use the same tube model) :while the 7854 the flare/halo effect is unnoticeable, the 7904 is definitely visible already with moderate brightness.
Could it be the crt damaged by some mechanical shock?
What do you think about it?