Casio WK-220 White Keys Replacement

Place device face-down

Remove 23 16mm screws with Phillips #2 screwdriver

Pry up long back panels with plastic opening tool

Remove panels

Turn device around so keys are face-up

Pull back panel away from keyboard and out of the way

Remove speaker(s) if necessary to access desired key section(s)

Use Phillips #2 screwdriver to remove two 16 mm screws (circled in red)

Pop wires out of plastic holders so speaker can be moved out of the way

Move speaker out of the way

Remove 4 18 mm screws (circled in red) from desired key section using Philips #1 screwdriver

Gently push white keys away from screws and pull up to remove from keyboard. Repeat this with the black keys

Reassemble with new/cleaned keys