Within 10 second, press the key to be learned by the set-top box remote controller (or the remote controller to be learned) (only four direction keys such as TV, TV /AV, Volume+,Volume-,Menu, Mute, OK, Back and F5 in the TV area can be selected. For example, after selecting the learning key (such as the "left" key), the red light flashes to indicate that it will enter the state of receiving learning signals. Put the 50px TV remote controller to be studied in front of this remote controller (the emission tubes of the two remote controllers are aligned, and the emission tubes are in front of the remote controller). Press and hold the "Left" key of the TV remote control for about 3 seconds to transmit the learning signal. If the learning signal is successfully received, the red light will flash three times quickly and then stay on to indicate. At this time, release the "TV" key of the TV remote controller, and the set-top box remote controller is in the learning standby state. If the learning signal is not successfully received, the red light will not flash three times quickly, but will remain on for a long time. You must press this button again to enter the learning state and repeat steps 2 and 3. You can press step 2 and step 3, and then learn other 12 keys. After learning any key, press the SET key to exit the learning state.