Continued from [3DS LL Teardown (3)] Examining Main CPU, FCRAM
After examining the main CPU and the FCRAM, we started to break down the upper case of the 3DS LL. It contains a naked-eye 3D LCD panel module, speakers, camera module, etc.
We could not find any screw on the upper case. So, we tried to open the case by inserting a flat-blade screwdriver into a gap on a side of the case. But it did not go well.
Near each of the four corners of the naked-eye 3D display, there was a small rubber cover. Thinking that a screw was located under each of the four covers, we took out the rubber covers with the screwdriver. But we found only a metal part under the cover.
Then, we considered that a double-sided adhesive tape was attached to the periphery of the upper case and heated the case with a heat gun. But we hardly saw any progress. Still, after heating the case with the heat gun for some time, the resin of the case was softened. And, by using the screwdriver, we widened the gap and looked inside the case.
In the case, we found a screw under each of the four rubber covers. It seemed that the screws were hidden under the metal parts that we found after removing the rubber covers.
When we scratched the metal part with the flat-blade screwdriver, it was peeled off, showing a screw. The metal part turned out to be a thin sticker. We removed the other three screws and opened the upper case.
There were speakers on both sides of the LCD panel module, a camera module in the upper area of the case and an antenna for wireless communication on a side. The three flexible printed circuit boards (PCBs) running through the hinge part were used to connect the LCD panel module, speakers and camera module to the main board. The antenna was connected to the main board with a coaxial cable.
The speaker of the 3DS LL has a different shape from the 3DS' speaker. While the 3DS has round speakers, the 3DS LL uses rectangle-shaped speakers, which are vertically long. The camera module of the 3DS LL was almost the same as the one used for the 3DS, consisting of two outward-facing cameras for taking 3D pictures and one inward-facing camera.