Using your Sony STR - DH510 A/V Receiver is easy. First, connect it to a power source of 120 V AC 60 Hz. Then, use the various input ports to connect your devices like TVs, gaming consoles, etc. For example, you can use the HDMI ports for high - definition video. The AM/FM tuner allows you to preset your favorite radio stations. When using the remote control, make sure the IR signal can reach the receiver. As for maintenance, keep it in a cool, dry place. Avoid exposing it to direct sunlight or moisture. Regularly clean the exterior with a soft, dry cloth. If you notice any issues, it's best to have it checked by a professional. Remember, this product doesn't come with a remote control, so you'll need to get one if you don't have a compatible one already.