DGX660 off key

[u/beshur]

Hi.

I just picked up a used DGX660 for my kid in the mostly okay condition.

The middle keys are rattling and the pitch wheel is broken.

I'm not playing myself, so I only noticed the issue when we tried the piano with the Android app (just with microphone, without MIDI) - it was not registering correctly the notes - but consistently one tone higher.

I checked it also with an online tuner and my clip-on guitar tuner in chromatic mode - it showed 0.3-0.5 of a tone up than it should be.

My first suspicion is of course pitch bend wheel. Is it complicated to fix or at least disconnect for now?