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6.4.4 Removing the Main Control Board
Disconnect the alarm lamp cable, cable for display backlight, display cable, and the cable
between the main board and keypad board respectively. Unscrew the four M3×8 screws
and remove the main board, as shown below:
6.4.5 Removing SD Card
Remove the main board, and push the SD card as indicated below to remove the SD card.
Cable
Cable
Cable
Wi-Fi module