robertc2k's 1st and 3rd and MacrossZero's Hex are all Sony12 device 1, function 46. This is the standard Discrete On used by Sony for years. The 2nd Hex is Sony12, device 1, function 56 which was used in a few non-USA TVs. The 4th is Sony20 device 26.121, function 46, used in some LCD monitors.

 

Here are some others to try. They are based on speculation. We know that some TVs have started to used Sony15 instead of Sony12 for discrete inputs, so it is worthwile to try Sony15 for device 1.  (Note that any device number larger than 31 will automatically be Sony15.)
 

Sony15 Dev 1 F 46

0000 0068 0000 0010 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0018 0360

 

Sony12 Dev 26 F 46

0000 0068 0000 000D 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 03C0

 

Sony15 Dev 26 F 46

0000 0068 0000 0010 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 0018 0018 0018 0018 0018 0330

 

Sony 15 Dev 151 F 46

0000 0068 0000 0010 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0300

 

Sony 15 Dev 164 F 46

0000 0068 0000 0010 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0018 0018 0018 0018 0030 0018 0018 0018 0018 0018 0030 0018 0018 0018 0030 0330

 

Sony 15 Dev 119 F 46

0000 0068 0000 0010 0060 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 0018 0030 0018 0030 0018 0030 0018 0018 02E8