> Does AUTO switch the signal to NTSC or does it just convert it to PAL ?
Yes it switches to NTSC.
If set to PAL, the 750 does a conversion from NTSC at 30fps to PAL at 25fps. This is very noticeable when you play R1 NTSC discs, and I think unwatchable. Not sure why Wharfedale couldn`t convert the NTSC signal to PAL60 (which also runs at 30fps).
Therefore you should set your 750 to Auto so that it will output R1 discs to your TV in NTSC - assuming your TV can use this.
Somegeeza