sony sacd 775 loading tray alignment

hello, i am trying to fix the tray to load in correctly on this 5 disc changer, I happen to drop it and tray was knocked out of place and would not eject. I took it apart and put it back together but now I hear the motor but it sounds like it is getting stuck. my question is there a specific way to put a tray back on or a particular way to align the tray with the cogs?