I have this great little box and I've completely cleaned and polished it. It looks brand new. The problem is that when I run it on either AC or DC after about 3 minutes of perfect play, the sound starts to fizzle out and then there's nothing. If I turn it off and let it rest for a few minutes and turn it back on, it runs for about 3 minutes perfectly and then fizzles out to nothing. This happens wether or not I'm using the tape deck, radio or line-in. It's so consistent that I've thought that it's a component going out when it gets hot.
Interestingly, the sound meter still registers sound even though there's nothing coming out of the speakers.
What I've done:
1. Cleaned all pots and switches (about 4 times)
2. I've hit every solder point for capacitors on the power/sound board to be sure that they are solid.
3. Checked every wire connector to be sure that everything's connected.
I have no idea if the problem IS with that particular board, but it was a place to start. I'm not an electronics tech, so beyond that Im lost.
Does anyone have any idea what this could be? I really love this little box and want to keep it alive into the next century!
I see that I posted the picture from before I fixed it up. It was a wreck, but now it looks like new :)