[R-390] R-390A blown fuse, now distorted line and local audio

[Tom M.]

Hello all, 

looking for advice to help fix this problem.
I was operating my radio today when it exhibited some funny business, flickering dial lamps and then sudden OFF.Found 3A fuse was blown (but B+ fuse OK).
Not knowing what else to do I replaced the fuse and supervised the power on.  It powered on normally with no other fuse blowing or flickering, but I have low and somewhat distorted audio on both the LINE and LOCAL audio circuits.
Initially thought the AGC was out so I switched IF decks; same issue.
I checked the audio at the DIODE LOAD through an amp and it is lovely/normal.
So Q: where should I start looking to repair this audio problem?I don't know if the blown fuse was a red herring or not but it sure seemed real like bad stuff was happening right before.
Twenty five years ago I changed C603A/B (30uF caps on 1st AF AMP) and the PS electrolytics, so even though the originals are gone the "new" ones are 25 years old.  BTW the PS has the orig rectifier tubes in it; no solid state.
So to sum up, DIODE LOAD sounds fine, LOCAL and LINE audio are low and distorted after blowing the fuse.
Advice?
Thanks in advance.Tom