According to RHM5757's Sony site
[Link: anycities.com], that IMO is the best site for all Sony commands, it uses Sony20:26.83. He does not list the discrete commands but if it responds to them it will most likely be be these:
Device Code: 26.83 Function: 46 =On
0000 0068 0000 0015 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0018 01DE
Device Code: 26.83 Function: 47=Off
0000 0068 0000 0015 0060 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0030 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0018 0018 01C6
Please let me know if these work so we can forward that information to Rob aka RHM5757.
-Jon