Tc-40as520u Manual. View the Tc-40as520u manual. Panasonic Tc40as520u manual for Panasonic Tc40as520u TV. This owners manual for Panasonic 40 LED 1080p smart HDTV is free to view or download. This Panasonic television has builtin WiFi and is a Smart TV, adding a lot of additional features and entertainment choices such as streaming movies, music and more, and going to websites with the included Web browser. You are viewing the manual and parts listings for the Tc-40as520u.