[Elecraft] K3 I750 hz tone

[f9oj.7]

Hello
Perhaps I'll look stupid (once more !), but I can't find how to switch a 2 m 
repeater on with the 1750 hz tone.
I have the minus 600 khz OK, the 1750 hz tone ( which is the standard in 
France) is set normally, but I couldn't find, in the owner's manual or 
manually, the right way to open the blessed repeater !
If someone knows the trick, let me know ...
Thanks in advance
73
Jacques de F9OJ
K3 # 2450