I have recently purchased a set of beolab 6000 speakers as extra speaker for my T  ( sony bravia X series), but I seem to run into the problem of beolab 6000 not switching off when I switch off the TV or automatically switch on and won't switch off with the TV turned off.

I'd hazard a guess and say yes - the Sony is outputting a low-leve hiss or buzz when off.

I seem to remember though that there was a known error with some BeoLab 6000s in which the 'threshold' for on and off was set too low. Keith Saunders is the person to ask about that, he goes by that username on the forum, I'm sure he'll pop up soon!

Here is some more info. Obviously you don't need to do this yourself. An engineer should be able to, but it shows there is a way of solving your issue.

Thanks for the input :)

This might be a shielding problem. How exactly did you connect the speakers to the TV? How long are the cables and what type are them?

I use 2 rca cable, one for each speaker, and connect them to my tv variable sound output.

Seems a silly suggestion, but both speakers are set to LINE in aren't they?

The tension filled silence following Alex' question is unbearable!

 

haha yeah ofcousre :)

I heard of some TVs turning automatically on from time to time to update their electronic program guide...

I think you're find you have an earth differential problem here where the ground (not mains earth) of the TV and the ground of the Beolab's have an AC potential difference greater than about 3 volts, this would certainly cause the type of problem you are describing.

Do you have a multi-meter to allow us to check if this is the problem ?

Do you live within say 5 miles of an airfield ?

I am no wher near an airfield, and I don't have a multi-meter, actually I have no idea what u just said haha.

This is NOT a mains power problem, so nothing to do with your mains cables.

As we cannot check for the earthing problem, the next likely issue giving this type of symptom was actually a product problem from way back which I recall, it was intermittent self oscillation of the operational amplifiers.

Given your previous answer about the multi-meter, you will need to get the assistance of someone with some electronics knowledge and able to solder a couple of components as follows:-

Power-link mode: Mount a 1 nF capacitor across 03D1.
Line mode: Mount a diode 1N4148 between 03R126 and 03D19.

Thanks for the information, I guess I would have to ask the tech at B&O store to do that for me.

Certainly the B&O dealer should be able to do the job for you, but if you or someone you know can use a soldering iron and you are willing to purchase the two components, it would certainly be the cheaper option. If the cost is not a problem, then let the B&O dealer do it for you.

Many (most) B&O products these days do not have a mains earth connection and even when they do, chassis earth (ground) and signal ground are isolated for good technical reasons which I will leave for another day. When the product signal ground needs to leave the the product enclosure via say a powerlink cable it is open to outside interference which can cause the signal ground to be sitting at a voltage difference between the two products. You only need a potential difference of between 1 & 2 volts to create a problem, one of the biggest causes of these type of problems these days is from strong RF pickup which can come from a lot of things. Of course the longer the cable between the two products, the more likely you are to have an issue.

If you think you are getting RF interference there is a very simple test you can do with a standard mult-meter, set it to the AC 50 volt range if it is not an auto ranging meter. Put one lead on mains earth and the other on the signal ground at the speaker, if you get a large reading say above 5 volts, then you have some interference of this nature.

With regards to your comments about the yellowish colour indicator light, I suggest you physically swap the speakers around and see if the problem stays with the speaker or moves with it.

I have physically swap the speakers around, and the problem stays with the speaker.

Yes, the speaker has the problem, so you or your dealer needs to do the modification as I previously outlined. That will certainly solve your problem.

My local dealer replied my email saying intermittent self oscillation of the operational amplifiers is the problem associated with beolab 8000, and not with beolab 6000

I am very sorry to tell you that your dealer is incorrect. The self oscillation of the operational amplifiers is your problem and it certainly does effect the Beolab 6000

To be completely clear on this point, the Beolab 6000 and 8000 had similar symptoms problems of switching off and on, but they were not exactly the same and the solution implemented by B&O was different.

The information I provided you with previously is correct and I suggest you go back to your dealer and suggest he calls his technical support department.

if your BL6000 serial number is lower then 10500000 thy don't have the modification, if it's higher. then I think you better look at the RCA connection on the TV, I have seen many TV's with bad connections on the RCA connector (inside TV).  

Yeah, your right, my dealer told me an interesting fact that the newer models of beolab 6000 had that mod built in.

I think the best way forward here is for you to tell us the type number and serial numbers of your two speakers ?

Thanks for all the replys :)

Just because the dealer did not find a problem in his/her workshop does not mean there is not a problem. Your dealer should have come to your home and reviewed the problem you have reported, not just testing the speakers in isolation.

Why did the dealer not come to your home to see the problem for themselves ?

If there really is not a problem with the speakers, then its almost certainly going to be a grounding issue, either way your dealer should be able to sort it or do we not have the full story ?