I have recently brought a Singer portable record player, which uses AC
current or batteries, back from the dead. The last thing I am hoping
to do is eliminate the hum in both channels. I'm guessing (based on
my INCREDIBLE knowledge of electronics....NOT!) that it could be
capacitors, because every seems to note how they go bad. Whatever the
source of the problem, I cannot read a schematic and certainly can't
diagnose it.

So: Here is a photo of the schematic:
http://i253.photobucket.com/albums/hh46/eidling/singerHE-2220schematic.jpg



And here is a photo of the insides of the unit:
http://i253.photobucket.com/albums/hh46/eidling/blaupunktinside.jpg


The hum is there even when the volume is all the way down, if that's a
clue.

I would appreciate any help you DIY experts can give me. Many thanks!!