use the preset station numbers to put the code in eg, if the number is 1472 you press No1 once or until it reads 1 ,No 2 f.our times or until it read 4 No 3 the same and so on then when you have all the correct numbers displade you will have to press and hold one of the other buttons other than the preset station buttons, until it bleeps. just keep pressing and holding down for three sec's different buttons untill you get the correct one. this will not lock you out as long as the correct code is shown.
The above is the normal way. and only a guide. Not nessaserry right for your radio.