Thank you very much.It looks like your device uses a PT2277 IC for decoding the code. This chip does not learn codes. The code is set by setting the address pins high, low or floating. In the picture of the etch side of your board you can see that a number of pins on the PT2277 have a strip of etch above and below them. One is at ground potential and the other is at Vcc potential You set the code by dridging the address pins to ground, Vcc or leave them floating. The PT2277 is a family of ICs that give different types of functionality. If the transmitter is not the one supplied with the receiver there is a good chance that it will not work.
Here is a link to the datasheet on the PT2277 family of devices.
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by Jeff Child