I have an audio amplifier for which I am unable to determine the device code. The amp's remote has only three functions; vol up, vol down, and mute. There is no power button on the remote so the "search for code" feature seems to be negated (or is there something I'm missing there?). This amplifier is a very obscure brand name (Plinius Audio in New Zealand). But the tech I spoke to says it uses the Philips RC-5 remote control protocol and that the device code in that context is 022. What OFA device code would this translate to? Thanks for help.