I have dozens of ESU sound decoders that I've installed over a number of years, including a number of the 73100 board. Today, after turning the track power on, I heard a loco that I did the 73100 install on a couple years ago making some subtle but odd sounds that then subsided. Investigating further, I fired the loco sound up and noticed the volume was extremely low, but otherwise the sound was not garbled or distorted. I then noticed THAT smell but couldn't tell exactly where it was coming from. I then discovered the speaker was screaming hot the touch and that it had melted the shell above it. Hoping maybe it was a speaker failure, I swapped out the speaker and then fired up the sound. It sounded normal and with good volume, but I noticed it was also becoming extremely hot and quickly. I'm thinking amp failure. Thoughts?
