The beginning is like the hack for the JVC XV-522:
1 make sure there is no disk in the tray.
2 unplug mains AC
3 on the unit press and hold "play" and "open/close"
4 while holding these keys plug in mains power
5 release these keys and test apears on the display
6 press "3D-phonic"
After this Step, it must be different. Does anybody know how to continue?
Cheers Julien