link

No, you need a laser deep clean.

Dear all - many thanks for all your help so far

I’ve put the original software back and the CD works again. So it seems the issue is comparability of SW3.4 with my drive or some other software element. As I said mine is type number 2672 - do I have any hope of getting it to work with the later software? As I say it really has to allow option 6 to be of any use in my setup.

The service manual has a couple of paragraphs about precautions to take when changing the microprocessor and/or EEPROM modules (eg waiting 20-30 secs after connecting to mains before operating etc). Did you observe all the guidance?

A little detail that I remember from when I had a BS3000 MkI (with the small clamper). At the time the MkII version with the large Clamper was already available:

My MkI was a very early one (bought it preowned from a dealer at the time) and I had the software upgraded to make it N.Radio ready. If I remember correctly SW 1.34a was the newest one available for MkI at the time. The service Center in Vienna gave me the information that the MkII sofware EPROM (with a higher version number) was incompatible with the MkI Bs3000.
Other than the large Clamper and the grey front, there were some internal difference between MkI and MkII. For example MkII had PIN-Protection (the MkI not).

So if in the OP-case the MkI works again with the old SW chip, it might show that there are indeed some compatibility problems between MkI unit and MkII sofware.

Just a thought...

Cheers
Foxtrott

Thanks again Guy - I can confirm I followed all the procedures in the service manual. I repeated the swap to test, giving a couple of minutes before selecting a source with the same results.

It seems Foxtrott might have the answer - the 3.4 software may simply be incompatible with my system, which is a small clamper model, but with the linear rather than radial arm cd system.

thanks all for your help. Looks like I’ll be selling it. Shame as it is a nice little stereo!