Casio SF-5580RS Service Manual page 28

8 Remove screws on PCB shown below then remove PCB ass'y.
9 Separate upper cabinets.
Caution:
Heat seal and wires must be placed inside of the hinge in order for the Lower cabinet (keyboard) to fit
into place.
If heat seal and wires are placed improperly, they are damaged.
Main PCB
(11 screws)
Heat seal
Lower cabinet
— 26 —
Keyboard PCB
(13 screws)
Wires (Black/Red)
Hinge