Hello, I have a problem with my Roland HP1800e digital piano.
Sometimes I can do 5 minutes play without any problems but usually after a short time there is a very loud distorted noise.
The LEDs then flicker slightly. It seems as if the power supply collapses.
I opened the piano and the input voltage is ok.
The voltage on the amplifier board is 2x 17.5V AC (35V total).
I also unplugged the circuit board and only connected the headphones. The same problem exists here.
So I suspect the problem is on the mainboard.
The input voltage on the mainboard is 18.8V AC.
Is that OK? Or do I have a problem with the transformator?
Or what could be the problem?
I would be very happy to receive further information.
Thanks.
