Nintendo 3DSのスライドパッドの交換

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There is a black plastic ring that sits between the bottom of the circle pad and the underside of the upper case. The ring has a slit in it that allows you to remove and reinstall it.
Use a spudger to orient the Circle Pad and plastic ring so that the slit in the ring is 180^o from the opening in the bottom of the Circle Pad.

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