Remember too that if you want the AR to be set up exactly as you had it set up before you switched it OFF, when you turn the AR ON hold down the bottom button to the left of the screen (but also, you have about 5 seconds to press that button if you have forgotten to do so).
I press that left hand bottom button every time I turn the organ on, as I probably want to carry on with something I was doing beforehand. I do know that when you turn the organ OFF and then turn it ON again, all the Registrations in the Registration Memory Buttons (between the Upper and Lower Manuals) are as they were when you turned it OFF. These only change when you deliberately change them by 'saving' something into them. Eg. with a Registration you have set up and put it into a Registration Memory by pressing and holding the RED M and then pressing a Registration Memory number. Or when you load in a floppy disk, in which case all the Registration Memories will be replaced by those on the disk. Any USER STYLES that you had been using will also be replaced by what is on the disk. If there are no USER styles on the disk, then your USER will be wiped clean. If you go to it and choose eg.USER 1, or USER 2 it will say No name. So if you have been working on something, make sure you SAVE it to a floppy disk before loading in another Registration from a disk.
Now, there are one or two important things to remember about all of this. If you don't hold that bottom left hand button as you turn the organ ON, the 'keys' will be set up with the default Yamaha Organ 'ELECTRONIC' flute sounds. OK, you can then press a Registration Memory Button to get back the Registration you were using before. But this will only give you the REGISTRATIONS you were using (including USER STYLES). One important thing that is not restored by pressing a Registration Memory is the TRANSPOSE. I remember once, I had used the TRANSPOSE button to put the pitch up two or three notches because I felt the voice I was using was too low, and I didn't want to play the piece in a higher key .. so used the Transpose button. I was all set up to do a recording, but had to go out, so turned the organ OFF. When I came back I turned the organ ON (without holding that button), pressed the first Registration Memory I had set up, and did the recording. I couldn't understand why it didn't sound right! Eventually I realised that the TRANSPOSE light was not on. It was then I realised that I had lost the 'Transpose' by turning the organ OFF.
Brian, I suspect that the REGISTRATION SHIFT is another thing that is not 'remembered' when you just turn the organ on normally. But I'm sure that if you held that bottom left button down as you turn the organ ON that it would be remembered. And, as Peter said, the configuration you had set up for it. There are three ways you can have set up the REGISTRATION SHIFT. The 'default', which is to move from 1, to 2, to 3, to 4 etc. every time you kick the right footswitch. To 'return' to the same Registration Memory every time you kick the footswitch eg. go to Registration Memory 6 every time the footswitch is kicked. Or program your own order in. Eg. 5, then 4, then 9, then 4 again, then 10, then 4 again etc.
Moral of this story? Press that left hand bottom button every time you turn the organ on.
I seem to be rambling on again!
Hugh