I got recently a PU-2294B(D) CD-player. Despite I (should) have got the official code for it, I cannot use the radio. I have no manual for this car radio, so is there some special procedure how to entry the code?

Also, is it possible to change the code on this radio? Could it be that the code I got from the local Citroën dealer would be changed by the previous user?

I read here some older thread where Samson said that the correct code is written on the top of the 93C46 EEPROM chip inside the radio. I opened the radio and on that chip there was this kind of text:


None of those seem to be the code. Of course I could take this radio to be decoded in some repair shop, but it would be more expensive than the radio itself. What to do? Help!