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The schematic shows a connection for an external AC adapter, which presumably outputs a DC voltage. That's where I would suspect the troublesome part to be. What happens when you run it on batteries alone w/o the AC adapter connected?
Cheers,
LarryO
At 11:21 AM 3/27/2008, you wrote:
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!!
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