[Kenwood] TS-570 Question

[Lennnie in Michigan]

I have an exterior antenna tuner.  A LDG AT11-MP auto 
tuner.   Because the AT11 works nicely I don't need to use the tuner 
in my TS-570 S(G) transceiver...  Is there some way to turn the tuner 
in the 570 off temporarily???

Thanks in advance for your replies.

Len KD8CWP