To use this Folsom IP - 2003H video signal processor, first connect it to the correct power supply that comes with it. Then, connect your video sources and output devices as needed. When using, make sure the connections are secure to avoid signal interruptions. As for maintenance, keep it in a clean and dry place. Periodically check the power supply and cables for any signs of damage. If you encounter any issues, check the connections first before seeking further assistance.