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
My much prized Beogram4000 which i've owned for 40 odd years has lost the right channel......well if i turn the balance all the way over and the volume up then I can hear slight audio from that channel.
I have checked the phono cable from the unit to my Beomaster 2000, and although there is a joint in this cable from a modification I made years ago, fitting this unit on to "invisible shelves," i am pretty sure this is ok.
I have looked inside the 4000 and can see nothing obvious and wondered if anyone had any ideas, before i start digging too deep. The cartridge is an MMC 20E. which works fine in a Beogram 1700 plugged in to the Beomaster 2000
I hope someone can give me some pointers please.
Equipment: Beogram 4000, Beomaster 2000, Beocord 8004, Beovox S60's.
Check inside the DIN plug on the signal cable at the Beomaster end.
Martin
Since you verified the phono cartridge is good I would carefully check the connector on the end of the Beogram 4000 tonearm (where the cartridge mates to). Those are notorious for cracking and breaking. If that is the case then there are repair options for that connector. Changing one isn't really a DIY type procedure though.
-sonavor
Hi There
I think that on closer inspection I have found the problem and am surprised i have any sound at at all.
As you suggest the connector for the cartridge appears to be the problem. I put a mirror under the tone arm and took a photograph the contacts are almost completely corroded away.
So I would be very interested in your options for repair. I do have some Electrical connector paint but this seems a little heath Robinson.
Thanks
Ah, well...bad luck but as I said earlier, it is fairly common with the Beogram 4000. The failure is kind of interesting as a number of Beogram turntables after the BG4000 use the same style connector but don't seem to have the same failure rate.I have two Beogram 4000 turntables. Both had broken phono cartridge connectors.
On the first one I had to steal a connector from another Beogram and use as a replacement. That worked of course but it isn't a good fix from the standpoint of rendering another Beogram unusable. Here is my post on the first BG4000 I had to repair the cartridge on (start about half way down the page). Man, hard to believe that was about this same time of year five years ago!
On the second Beogram 4000 I didn't want to steal another connector from a donor Beogram. I was able to collaborate with Beoworld member, beolover, in his development of a new, replacement connector. Here is the post on the second BG4000.
The result of beolover's replacement BG4000 phono connector worked out great. You can read and see more about his restoration here.His blog site also has other BG4000 related restoration posts. A list of them is here.
You will also be able to see the scope of the connector replacement in the Beogram tonearm. It isn't what I would call easy.