Casio TE-7000S Service Manual page 15

MODE KEY
1. Remove the two screws.
Remove the mode key.
2. Remove the two connectors and two FPCs.
3. Remove the four screws and the earth cable.
4. Remove the contact rubber and PCB ass'y (E468-E6).
KEY BOARD ASS'Y
1. Remove the seven screws.
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TE-8000F only