Onkyo TX-NR545 Manual page 126

The remote indicator will light.
The RECEIVER and ZONE2 buttons cannot be programmed.
2. With the number buttons, enter the following 5­digit remote control code
within 30 seconds.
RI Dock: 81993
Cassette tape deck with RI jack: 42157
Programming is complete when the remote indicator flashes twice.
The remote indicator flashes once slowly when programming the
remote control code fails. Try programming again.
Input selector on the RI Dock: Switch to "DOCK" or "TAPE". For details,
refer to the RI Dock's instruction manual.
To operate Onkyo components directly or Onkyo components that are not
connected via RI, use the following remote control codes:
Onkyo DVD player: 30627
Onkyo CD player: 71817
RI Dock: 82990
With some models, operation may be not possible in part or not possible
at all.