Could be one of the TSOP382xx series, in which case far left -ve, middle +ve and far right digital signal out. They respond to different carrier frequencies of IR i.e. 30 to about 56Khz (the more common being 36 or 38). If your remote is vastly different than what it wants you may not get much of a response. If the remote does nothing then hook up a IR LED to a MCU or oscillator circuit to generate frequencies from 32K to 38K in 2K steps. If you've got an Arduino this is trivial.