The Onkyo DV-CP802 DOES have discrete codes for On/Off and direct disc access, Onkyo support does not know what they're talking about (I've gotten that impression talking to them before.) I own the DV-cp802.

See [Link: onkyousa.com]

and click on photo gallery, then remote control.

Their remote itself has buttons for ON and STANDBY(same as OFF), plus direct disc access buttons.

Too bad Denon has not come out with a universal changer, as that's what I would have preferred. The Onkyo has been a very good player, however.