ARCHIVED FORUM -- March 2012 to February 2022READ ONLY FORUM
This is the second Archived Forum which was active between 1st March 2012 and 23rd February 2022
Hello Beoworld :)
I did not open a specific topic to introduce myself as a new member, so I will do it here:
I am a 25 y-o Frenchman living in Hamburg, Germany. I have been living for quite a while with a Danish partner, who introduced me to the Danish culture and amongst different other things, to B&O. Hamburg being only few hundred kilometers from Copenhagen, I have had the chance a couple of years ago to purchase there a fantastic Beosystem 7000, repaired as new, from what is apparently considered as the official 2nd hand B&O retailer in Cph. It is working perfectly so far and brings me joy every day ;)
Last weekend, I found in a 2nd hand store near my place a BeoCenter 7000, for a very affordable price, so I bought it. It has a MCC20S cartridge, which came with it. The person at the shop - who I believe didn't know much about the device - told me that it was tested and worked. Back home, I plug it and indeed, the turntable rotates, the tape recorder functions and the radio turns on. But, whatever is the source, after 2 seconds, it shuts down, as if I had pressed the off button...
As B&O experts, does anybody have a clue on what could be the cause of it? It's not a source in particular, seems to be the amplifier.
Cheers,
JC
Probably the auto-protection comes in. When DC appears on one of the amplifier outputchannels, the master will be shut off.
It's just one of the many options. This master has also it's weak points. Powersupply/idle trimmers and capacitors. Cracked solder joints etc.
Thanks for such a fast answer :) Is there a way I can test these things on my own, or shall I leave it to a professional? Capacitors can be changed quite easily, correct?
In many cases, the shutdown is caused by DC on the outputs (as mentioned above) butthe amplifier in the Beocenter 7000 has no adjustments for this.The culprit is often one of the small signal transistors in the early stages of the amplifier.
Martin
Ok, then I guess it is something I cannot fix myself. I'll bring it to some repair shop some day. Thanks for the explanations! :)