Marantz Security Code

SOURCE: entering security code to Clarion CRX91R Radio Cassette

press and hold clock button

SOURCE: my car radio security code will not unlock radio

Are you sure that you have 

1...The correct code?

2...The correct Code Entry Instructions

If you require a code the radio will have to be removed from the car dashboard .
Then please POST A NEW QUESTION quoting  the MAKE + MODEL of your radio plus ALL the LETTERS and NUMBERS on any LABELS , BARCODES or STAMPED IN THE METAL CASING. 
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If your radio is a RENAULT/PHILIPS then here are the correct Code Entry Instructions

Philips Renault Code Entry 
 
Turn on the radio and the display will show 'CODE'
 
Use the steering controls for code entry.
 
Press the [¬ ] button then rotate the thumb wheel for the correct first digit
Press the [¬ ] button then rotate the thumb wheel for the correct second digit
Press the [ ¬] button then rotate the thumb wheel for the correct third digit
Press the [ ¬] button then rotate the thumb wheel for the correct fourth digit
 
If the correct code is now shown on screen, 
press and hold the [¬ ] button for up to 10 seconds to store the code 


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kenw392

• 2226 Answers
• Posted on Apr 08, 2011

SOURCE: reset my kenwood KDC-BT838U car

Try entering the code and pressing the seek up button.