These are the factory specified RC5 extention codes that operate the DP870. Note that the discrete on and off codes listed will not operate unless the rear panel switch is turned to external and the RC-5 jack on the rear is connected to another Marantz component RC5 jack.
The Marantz SR-4000 requires a two second push and hold of the Input and Standby (off) buttons. In this ccf, the process has been eliminated with macros. Anyone wishing to study the technique of programming sustained bursts of IR should download this file and explore it and its accompanying read me file.