Casio PX-130 Service Manual & Parts Manual page 14

3. Place the main unit with the keys facing up. Undo three screws on the right side case.
4. Remove the right side case.
5. Undo three screws on the left side case.
6. Remove the left side case.
NOTE: The power switch and the M900-HPA1 PCB are assembled to the left side case. Do not pull
the left side case forcibly.
7. Undo and remove two screws from each side case (S-CASE-IL and S-CASE-IR).
Right side case
M900-HPA1 PCB
Left side case
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Power switch