OK, let's get started.

Here you see a MOTIF6 keyboard.

Here's a MOTIF7 keyboard.

The controls are identical but with extra blank space on both the left and the right due to the extended keyboard.

Disassembly starts by flipping the keyboard over on its top.

Protect the wheel controllers by using a block to raise the keyboard off the work surface.

Remove all the black sheet metal screws from the bottom tray.

Don't mess with the rubber feet - they stay attached.

This photo shows a MOTIF6.

A screw on each end of the front lip must also come out.

The expansion cover screws must also come out.

All the bottom screws are the same.

Remove the bottom tray and set it aside.

A MOTIF7 is shown in this photo.