ESN (Key CD) security operating procedure
•This process cancels the protection for the ESN deck.
•If power to the 54420 is disconnected, then reconnected, a key CD will not need to be inserted in order to return the unit to normal operation.
•Inserting a CD other than the Key CD will not cancel the protection. Instead, the display will show [ERR] for two seconds, then the normal CD playback mode will activate.
How to change the Key CD
1.First, cancel the existing Key CD.
Refer to “How to cancel the Key CD.”
2.Next, program a new Key CD.
Refer to “How to program the Key CD.”
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