This photo shows the two cables that connect the Korg M1's keybed assembly to its CPU circuit board.

Remove the bracket that keeps you from unplugging one of the cables.

The bracket is attached with four gold machine screws:  2 large and 2 small.

Stripe one end of the bracket so it's easy to reposition.

Remove a second bracket on the high end of the keyboard.  This bracket is attached with 5 gold machine screws:  2 large and 3 small.

One of the screws also holds down an edge of the PCM board (Pulse Code Modulation).

PCM is a way of lining up the stream of zeros and ones that comprise the bits of a sound sample.

PCM is the standard form of audio used in computers, CD, DVD, and Blu-Ray players.

On the M1's rear panel, remove the two black machine screws that attach the PCM circuit board assembly.

Then, you can lift out the PCM assembly.  No cables needs unplugging.

Three circuit board assemblies and two mounting brackets are now removed from the M1's shell.

You can drape the boards over the rear panel as shown here.

Four screws hold in the keybed assembly.

Remove two gold self-tap screws on the low end of the keyboard.

A small bracket will also come off, which you should mark for easy identification.

On the high end of the keyboard, take out two gold machine screws, shown here.

Now you can lift out the keyboard assembly.  First, lift up the bass end, then slide out the treble end.

When reinstalling the keybed, slide the treble end in first.