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3. Use your hand to press the battery housing to separate the main frame, and then remove the rear housing.
8.4.4 Removing the Infrared Backboard
1. Loosen the two M3×5 screws fixing the infrared backboard.
2. Remove the infrared backboard.
3. Tilt the N1 main unit as shown below, and remove the two terminal nuts shown in the figure below.