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"Retro" 1996 radio security code help


Maverik

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Hi folks, I can't help take this to a slight extreme, trying to install this genuine Discovery radio unit but its locked, anyone got any recommendations for radio code retrieval? The Web is flooded with people offering code services just not a clue who to use. 

Cheers

Mav

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Sticking it in the freezer for 24h is likely to work.  The code is stored in CMOS memory with a battery backup.  The battery voltage drops with temperature, so you get to a point where the battery voltage is too low & the memory forgets it's content.

Normally you can see a button / coin cell on the board.  De-soldering it, waiting a few mins & re-soldering is generally quicker & more reliable, particularly on a vehicle intended to be used in low temperatures.  They may have used a battery with better low temperature performance.

 

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1 hour ago, simonr said:

Sticking it in the freezer for 24h is likely to work.  The code is stored in CMOS memory with a battery backup.  The battery voltage drops with temperature, so you get to a point where the battery voltage is too low & the memory forgets it's content.

Normally you can see a button / coin cell on the board.  De-soldering it, waiting a few mins & re-soldering is generally quicker & more reliable, particularly on a vehicle intended to be used in low temperatures.  They may have used a battery with better low temperature performance.

 

Does this remove any programmed security code?

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I doubt it, but once you can get in, on every set I have had, you can disable the code function.

However, you will have to have a read of the 750 page multilingual radio manual to confirm this. 

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On 5/29/2023 at 1:31 PM, Maverik said:

Does this remove any programmed security code?

Depending on the radio, it will either clear it or return to whatever the default was - something like 0000, 9999, 1234 etc most likely.

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