I have a Technics SA-CH650. On the amp there is a button for band allocation. What is this and how does it work. On the CD (sl-ch550) there are buttons for AI edit, J.FIT, Album and last fade. how do these work?
thanks

Phil, January 2016

Page 10 of the Service Manual says (8) Band select/allocation change button (-BAND-ALLOCATION) Press to select the MW, LW or FM radio band. Press and hold to change the MW frequency step.

http://diagramas.diagramasde.com/audio/Technics%20sa-ch655a.pdf

I could not be bothered to research the other things you asked about.

Good Luck..., January 2016