How to disassemble the K2?
1. Remove the screw from the frame (skip this if you have a plastic frame version keyboard).
Screw Type: Hex socket head cap screws/KA2.6*7*4.2
2. Pull off the keycaps and remove the screw on the PCB as shown in following image.
Screw Type: KB2*3.8*7mm
3. Take out the side frames.
4. Then you will be able to take out the PCB.
(Note: Please be careful of the toggles on the side when you disassemble the keyboard and reassemble it.)