Unclip electric wire for microswitch from the bottom part of door handle.

将微动开关的电线从车门把手底部分开。

If this positioning is reversed there is a risk of the carabiner twisting and allowing the rope to escape or the carabiner to unclip itself.

如果放反了，存在快挂扭转的可能性，导致绳子从锁中脱落。

If there are still some dust blobs, unclip the ribbon connectors with your finger-nail and remove the board (four screws). You can then spray out the whole optical block.

如果仍然有灰尘，用你的指甲把排线拔掉然后把主板移走（有四颗螺丝）。你可以接着喷整个光学部件。