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I've got an A3 , it has a faulty volume control. When i try and adjust the vol ,it either goes mega loud or silent. when you turn it off then on again it resets to an adequate level. It become very difficult to control these volumes.

Anyone know how to fix it without having to replace????
 

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Its knackered, two of my headunits have done this, you need to get it replaced under warranty if you are still covered. It can get very embarrasing trying to adjust to volume in a busy public street
 

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dead simple as to why... the radio has a microprocessor (Chip) with an eeprom to store the memory in. this eprom has temporary memory which is lost when power is removed and can be written to LOADS of times, it also has permanent memory which doesn't loose it's data but can only be written to say 10,000 times. the software for the radio writes into permanent memory every volume adjustment, so after a while it starts to loose the memory of the volume setting and hence blasts it out or very quiet. you can get a new microprocessor reprogrammed with a modified software which is readily available, but specialists charge bout £70.
I've tried sourcing this microprocessor but is seems obsolete.
you'll notice it only does it when the unit is cold normally, this is because as it heats up, the material in the eeprom memory is more easily written to.
 

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would you have the details of any body who can fix this problem or where can you get the software from to reprogram the eprom, also by the way could you mention the part number for this chip
 

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My 1997 A6 Quattro with the Concert head unit is doing exactly the same thing. I only bought the car last week to replace my superb BMW 7 series. Hopefully this isn't a sign of things to come with the Audi. Hopefully someone can Identify a company who can fix this annoying problem. Most Eeproms are push/pull fits so can be easily removed and refitted but finding someone to program it initially may be a bit of a problem and I really don't want to shell out for a new head unit as the sound quality when it works is superb.
 

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I have the same problem! i thought it was a seal above my rear view mirror, or windscreen seal had gone? as when it lashes down with rain, i did notice that there was water on the face of stereo, maybe coincidence.

any reponse from Audi, or possible ppl to fix ?

Ski
 

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just a thought... there loads of A3 concert radios / cd players OEM with codes for sale on ebay UK and us.. normally about £75 - £125 -

Cheers
 

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Mine too. It started doing it about a year ago then stopped until recently. If anyone has any knowledge on how to fix rather than replace, please pass it on. Thanks and my ears are ringing!
 

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Hi I have the same on a 1998 A3 I found this on a website in relation to the microprocessor number not sure if the number is correct but someone was looking to buy one for the same problem.
"Hi I'm trying to buy a new micro to fix the audi concert volume control problem. It is fitted with a MC68HC05, but I can't find these on sale. What other chip can you use and do you have to use a new one? from website http://forum.eserviceinfo.com/archives/99999947.html
 

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crikey this really is a common fault!!! ive got it too, looks like aftermarket headunit time - shame the facia, harness and aerial adapater is £40 for these.

most other cars are about a tenner for the lot, typical!!
 

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Hi - my first post in here!!!
Got my A3 1.8T about 4 weeks ago (2000) and the stereo does exactly the same!!!
Will have to try something before the neighbours/missus kill me!!!
 
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