I tried codes from a year or so ago's model that I got from a pdf I had saved sometime previously.  It did not work.  I was trying to just get an IR code for All Channel Stereo.  Had a client's AVR go out in a lightning storm.  Very basic system with just a cable box, BDP and sonos feeding the AVR, and a MX890.  I had everything else I needed but no all channel stereo for Sonos use.  This was just a lowly RX-A680.