Casio PX-410R

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24. Remove eight rubber keys.
25. Remove 32 screws and the key PCB.
*Precautions when assembling the rubber keys
1 The length of this only one rubber key is different.
2 The numbers of pins on the upper and lower sides are different.
3 Insert the pins and fix them tightly.
Seven Pins
Four Pins
1
22
Eight Pins
Three Pins