I don't have one of these in front of me, but isn't the command for direct volume control "k f <ID> <VOL>"?? I think you have to the TV ID to a number and use that number to get feedback.? If I remember right it won't give feedback when you use the ID of 00 (all TVs) in your command.
You can then set a percentage of volume in hex from 00-64 like this (I'm using ID 01 for all TVs here):
5% volume = "k f 01 05\x0D"
12% volume = k f 01 0C\x0D"
100% = "k f 01 64\x0D"
You should be able to get the current volume with a "k f 01 FF\x0D" command.
You should see the following returns:
5% = "f 01 OK05x"
12% = "f 01 OK0Cx"
100% = "f 01 OK64x"
I hope that helps (and that it's correct!)
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