C/P Thanks to crazed 8.4
a.. Press and hold "Power + OK" buttons for more then 3 seconds. The LED will be turned on, indicating the remote has entered learning mode.
b.. Align the two remotes pointing at each other no further then 3 cm apart.
c.. Press the "TV Power" button, the LED will change from long light to slow flashing, which means that it ins waiting to receive the learning signal from the other remote.
d.. Press and hold the button that needs to be learned. When the XR4000 remote receives the IR code, the light will flash 3 times and then a long light to indicate it has received the IR code/signal.
e.. Repeat steps c and d for other buttons.
f.. Press "OK" button and the LED will turn off and IR codes will then be saved and the Learning Mode is now turned off.
copied from XR4000 User Manual
a.. Press and hold "Power + OK" buttons for more then 3 seconds. The LED will be turned on, indicating the remote has entered learning mode.
b.. Align the two remotes pointing at each other no further then 3 cm apart.
c.. Press the "TV Power" button, the LED will change from long light to slow flashing, which means that it ins waiting to receive the learning signal from the other remote.
d.. Press and hold the button that needs to be learned. When the XR4000 remote receives the IR code, the light will flash 3 times and then a long light to indicate it has received the IR code/signal.
e.. Repeat steps c and d for other buttons.
f.. Press "OK" button and the LED will turn off and IR codes will then be saved and the Learning Mode is now turned off.
copied from XR4000 User Manual