Hi Everyone As I mentioned yesterday, this project is nearing completion. The Beomaster 6000 quad has now been re-assembled and will be put to one side while I catch up on all the other tasks that I have ignored over the last few weeks. So what are my latest conclusions about the “quad”? Well, I have taken an old unit that wasn’t even

Must be a heart breaker for you John, I gather that you were very fond of that machine. Still, there is life after the 6000. Enjoy your medical career. Regards Geoff

Hi Everyone This project is now starting to near its end – that is for the time being at least. After it became clear that the faulty left rear amplifier was now working properly, I started to put the machine back together again. This turned out to be a fairly long task because I was regularly testing for shorts, a big risk on this unit where

Hi Just a quick thought where I have been caught out on this one before. Speaker cable plugs can be either put into speaker 1 or speaker 2 sockets. However, the speaker switches must be set to on. If the previous owner was using different sockets to you, you might have to reset these switches. They are well hidden and often overlooked. Just a thought

Hi Everyone When you change the ICs on the BM6000 amplifier three or four times you quickly find an easier way to do things. My first attempt took two of us nearly two hours whereas later changes took less than half an hour. I thought that I would document my procedure for changing the ICs and if anyone has an improved version, please feel free to amend

Thanks Eugene Pleased to hear that you are watching - I can always do with some help from someone with your experience. Have you worked on the "quad" before? If you answer "yes", be careful because you will be inundated with a stack of questions. Regards Geoff

Thanks for the ideas Olly At the moment, I will try the replacement options and see how far that gets me. I am not really into "new developments" and have enough trouble with existing technology. So when that time comes, I will ask you to send me an updated circuit diagram and we can take it from there. Regards Geoff

Thanks BenSA I was just wondering what the situation was with other 6000 quad owners and you have answered my question. Obviously, you have got used to your "small thud" and now you don't hear it. Unfortunately, my machine is still opened up with parts hanging off it and when I hear that noise, it scares me to blazes. I keep looking for

Hi Everyone I had a hard time getting this left rear amplifier to work so I will try to summarise my main learning points. In phase 1 of the repair job, I replaced the three ICs, the trimmer and the resistor and thought that would do the trick. After starting up, IC8 broke down and this fault was traced to TR4. If TR4 does not switch on, the trimmer

Thanks for the information Tournedos I will assume that this machine was not sold with this characteristic. If I had bought it like that, it would have been returned next day. So there has to be a way to improve it. There are a number of large caps on the power supply, a large 10000uF at the tail of the 60V supply, a 3000uF across the low voltage rectifier