Subwoofer Samsung 100W Erratico (REPARANDO EN VIVO)

I regret to inform my devoted subscriber (the one they call Mosquito) that the oscilloscope wasn't necessary for this repair either. Luckily for him (and unfortunately for me), my ancient Sony receiver (50 watts per channel of pure audio power) is now beyond repair, and I'll have to fix it. Then it will be useful, and we can demonstrate how to use the aforementioned test device to diagnose the problem and carry out the repair.