You will be removing 17 11mm screws with a JIS-1 screwdriver to detach the back of the keyboard from the front.

You will begin by removing 4 screws on each side of the piano, circled in red.

You will then remove the four screws that are a little hidden, circled in orange.

Next, remove the two screws in the middle of piano, as well as the three screws on the top of the piano, circled in yellow.