I Assembling the main PCB
9. Insert the FPC (LCD).
10. Fix the main PCB with a screw.
Screws (S4)
11. Solder five lead wires.
lead wire (while)
lead wire (green)
lead wire (yellow)
lead wire (red)
lead wire (black)
12. Insert three FPCs.
13. Install the microphone.
Note: Pay attention to the direction of the microphone cover.
Connectors
14. Insert an FPC.
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