We only use it for 20 baseball game a year and NOW...... if I turn up the volumes all to FULL I can bearly bearly ...hear my MP3 player or microphone worikng ....it's like only 3% very very faint....Blown fuse inside? or Power tansistor out? anything tI can fix without spending the $100 bucks for the Nady shop swap out/repair? I have a volt meter and soildering gun.....(The AMP lights come on and everything seems normal)
Very likely source of this problem is the "mixer out/amp in" jack on the back. Anything plugged in there breaks the signal path so, obviously any off board equipment plugged in there needs to be checked...but that jack itself could be faulty or even just dirty. If there is nothing plugged into it....you can get a phone plug (power off) and plug in and remove it a few times. This is a switching type jack so if the "switch" part of it isn't connecting with nothing plugged into it, the signal path would be broken and give you the results you've been having.
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