Hi
Thanks as you just prompted me to do it. 
My Samsung worked with code 231. I dont really need the telly to be controlled by it as I have the tv remote fairly handy and my settings are preset so I can just adjust the Humax volume
I wouldnt have thought it worked with a JVC but I know how niggly it can be as I had this problem a while ago when my product just wasnt recognised by my Humax 8000 It wasnt the end of the world though as I just had the tv remote handy