Hello Olly
Sorry for the late reply but I have been out of the loop for a while, overseas on business actually.
Thanks for sharing your video showing the delay circuit on the BM6000 speakers. The “thud” that I heard was very similar to mine and I am sure that you will have fixed that issue. I found the video hard to work out the circuit and would appreciate it if you could post a simple circuit diagram with a list of the components. That would be a great help.
Unfortunately my machine has been packed away for the time being because I didn’t manage to get much further. As you will remember, I got to the stage where everything was working and I only had the “thud” to sort out. I tried hard to work out where the fault was located but to no avail and every time I switched it on, the noise seemed to get more aggressive. Finally, there was another bang (without the olufsen!!!) and I lost the left rear amplifier yet again. As this was the third set of ICs that I had managed to burn out, I wasn’t in the mood to buy some more and blow them up as well. That Beomaster has now been sent to solitary confinement and I don’t really know what I am going to do with it. I suppose that the big issue is that there is probably something wrong with the amplifier PCB but it is so damn difficult to work on. Every time you pull it out to gain access to the components, you put more stress on the connections and there is probably an intermittent contact somewhere in the circuit that is playing up. One day when I am totally bored, very rich and have an endless supply of MJ2501 and 3001s ……… I might start again.
Thanks for all of your help and I was very pleased to learn that you had some good success with those shims. My ones worked brilliantly on the 6000 – for the little time that I had to play with it.
Regards
Geoff
