On the far right PCB board, you may notice two adjustment knobs (they are designed to be adjusted using a screw driver). DO NOT mess with these knobs. Doing so will cause the autofocus to not be able to properly focus, and unless you're able to learn how to readjust them, you'd have to get your lens professionally serviced to fix it.

Carefully disconnect the 7 ribbon cables from the main PCB boards.

iFixit connector guide

Unscrew the three Phillips #00 screws holding the PCB boards in place.

Pull off the black plastic cover.

Carefully pull off and set aside the main PCB boards.