I have a Roland KR-370 Japanese version. The speakers work when I plug my phone into the microphone jack, but the sound from the piano itself doesn't go through to the speakers or earphones.
I checked for blown fuses and loose wires, but can't see anything like that. I checked the setting for Local Control and it's on, as it should be. I tried all the other troubleshooters in the manual, but nothing worked.
I noticed the volume and balance sliders have no effect on the volume of the music when I played it through my phone. I don't know if that would help in diagnosing the problem.
I live in Phnom Penh, Cambodia, so it's difficult to find technicians. Could any one of you possibly help me out? Give me ideas on what the problem could be? Maybe you've seen something like this before?
I would appreciate that very much! Thank you for your time!