i got an SC-900 a while back with what i thought was the factory code tag with it, it has the radio code and key code. when i hooked the radio up today and imput the code (5645) it told me "code repeat" so i put it in again, did that about 3 times and it displayed "system off" so i assume this must be the wrong code.
the numbers on the top are 3533787-4969. then its 9726, then it says serial number and underneath it written in pen is 19216396. on the bottom of the unit there is S/NO. AL E510 V 07 18426 M 7 07 18426 E.
any help would be greatly appreciated, i really want to use this thing!