Ok, here is the deal. I called Forest River support about the zx 75 and when I said that, the tech right off the bat said, alarm won't shut off :-) So they are aware, the first batches had problems, subsequent batches have the option to shut them off, here is what I heard, but have not tried yet.
1) Make sure the unit is "off" not disconnected from the battery or anything, just not playing music etc.
2) The LCD, while still being dim, if you look closely, you will still see the time, and "somewhere" on the LCD there is the word timer.
3) If you see timer on the screen, press the sleep timer button and the word timer should disappear.
That should shut off the alarm.
So, to summerize, in the off position in the word timer is on the screen, the alarm is on, to shut it off, hit the sleep timer button while the unit is off to remove the word timer from the screen.
Here is to hoping this fixes everyones problems :-)