Casio EX-843 Service Manual page 31

1-6.
Checking and Registering the Serial Number
0 Carry out check and registration of the product serial number.
Tap "Set Serial Number".
Enter the serial number and tap the "Enter key".
1
Tap "Set Serial No.".
2
Tap " " to display the judgment screen.
3
Tap the test result to return to the menu screen.
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V-R200 / VER.2