Diagnosing Dead Channel...
Hi - I just got a Realistic STA-14 with a channel out. This thing was cheap, and not worth a lot, so it seems like a good victim for learning a few things.
I did the usual pot and switch cleaning but one of the channels is very very faint. Here's what I know...
- The bad channel is noisy even with the volume all the way down.
- The channel is bad through the headphone jack as well as the speaker outputs.
- There's no crunchiness when turning the volume knob, balance knob, or tone knobs
- The bad channel is out when the tuner is selected as well.
I'm hoping for some guidance in troubleshooting this. I have a soldering iron, a solder sucker, and I'm not afraid to ruin this thing.
In examining the board, I saw some blue/green corrosion around a couple of resistors - see the pic, especially below the yellow wire.
Would replacing these resistors be a good place to start?
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