The D-50 keybed is attached with a number of brass mounting screws.

This photo shows the bass end of the keybed.  Three of the mounting screws are marked with red tape.

Also at the bass end is a flat flexible cable that needs unplugging.  It comes from the keybed's after-touch sensor.

Gently pull the cable out of its connector – only friction holds it in.

You can mark the connector to indicate which way the cable was inserted (see right).

In the middle of the keybed, another mounting screw or two, previously hidden by the computer board, need removal.

This particular mounting screw, near the power supply, also ties down a bundle of wires.

On the treble end of the keybed you'll find two more mounting screws (see right).

One screw is a little inconvenient but a long, skinny screwdriver should do the trick.

After all the mounting screws are taken out, the keybed can be removed from the D-50 shell.

It may take a few tries to find the perfect exit maneuver but this photo shows it can be done.