Question about Alpine CDM-7874 CD Player

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Face plate buttons wont work

I have to press in the face plate many times before i can even change one thing like the volume to go up one. is this a wiring problem or something i can fix easily?

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This is actually a common problem with more than just that radio. Sometimes the pins on the back of the face plate need to be cleaned. Take the face plate off, take a Q-tip and dip it lightly in some rubbing alcohol. Then use that to clean the metal pins on the back of the face plate. Make sure it is completely dry before you place the face plate back on. If this does not work, your better off replacing the whole thing.

Posted on Jan 21, 2009

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Posted on Jan 02, 2017

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KENWOOD SECURITY CODE CLEAR procedure


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Type 1
During the code request mode, while holding the DISP key depressed, press and hold the Volume UP or DOWN key for 3 seconds (so that “…” disappears).
Then using your remote enter your code.

Type 2
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Then using your remote enter your code.

Type 3
Model# DPX-4020 and DPX-4030
Press and hold the 1 then the 6 preset key (preset keys are the buttons on face of radio for storing you "favorite" radio stations). "C" should display.
Then using your remote, enter your code.


Enter your number from the remote control unit. Your code number is 5227 (KCAR)

* Press numeric key “5” ( 2 times ) and press the Track UP/Next Track key
* Press numeric key “2” ( 3 times ) and press the Track UP/Next Track key
* Press numeric key “2” ( 1 time ) and press the Track UP/Next Track key
* Press numeric key “7” ( 2 times ) and press the Track UP/Next Track key

The security is canceled and the set enters the TUNER mode!

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on the back of the face plate there are 4 little screws take them out and see what is holding that button stuck or pull it out if you can ...

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