Casio EX-Z4 Service Manual & Parts List page 22

4. Remove the two screws and then the FPC.
5. Remove the CONNECTOR.
FPC
screws
6. Peel off the double-sided tape on the KEY UNIT.
7. Disconnect the CONNECTOR, and then remove the LCD UNIT and the KEY UNIT.
connector
8. Unsolder the two lead wires.
Lead wire (red) Lead wire (black)
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