RIBCAGE: YI 4K INSTALLATION GUIDEwww.back-bone.ca | support@back-bone.ca13Secure the board with one of the mounting screws you removed earlier (TYPE ‘B’). Place it in the bottomleft hand corner, the upper right will be left free for now. Finally, tighten the remaining screw on thelens mount.2-5 Mount the CMOS SensorNow is a good time to make sure your image sensor is clean and free from fingerprints and dust. Lensfluid and a microfiber cleaning cloth do a great job. If you need to clean the sensor, spray some fluid onthe cloth (not directly on the components) and wipe the sensor clean. We recommend a puffer to blowoff any remaining particles. The sensor can also easily be cleaned after assembly using a LenspenMiniPro (our favorite) or other cleaning tools.Take the CMOS sensor and create a small ‘S’ bend in the ribbon as pictured. It’s important to get thebend as close to this image as possible. Be sure not to bend or twist the ribbon sharply. Next connectthe sensor to the socket on the main board as shown. Make sure the connectors are properly alignedbefore applying any pressure. They should click together easily.