Your finger touches the gear under the plate, and then the plate can turn. If the bald head is at the bottom, it is a small plate. Move the bald head back a little, reinstall it, and then bring the big plate. You can only remove the panel after putting it back on the big plate.

This set of inverted turntable system released by Pioneer Company in 1990 is ingenious in design, and it is the only system in the world to install CD records in reverse and use laser face up. Thin film bearing system is more like LP turntable. Below the record is a driven cast aluminum turntable with relatively large quality. There is a carefully designed rubber pad on the cast aluminum turntable. The record is placed face up on this turntable, and the driving motor is directly driven from above. Of course, the optical head also works downward. This special reverse drive system is still regarded as one of the unique best designs. Although this design avoids the accumulation of dust after the laser head is placed for a long time, it also brings another problem. After the machine has been used for a long time, the glue that fixes the lens of the laser head begins to age, and the lens is easy to fall off.