ESN (Key CD) security operating procedure16ESN (Key CD) security operatingprocedureHow to program the Key CD1 . Turn off the main unit power.2 . Press and hold button [1], then the [FUNC]button, and hold both for more than onesecond.A [SEC] message appears, then in two seconds it willchange to [DISC].The CD3421 is now ready to accept your Key CD in theCD slot.3 . Insert the CD into the slot.A [SEC] message appears, the Key CD is ejected.
