General Forum

Re: beolab 6000 auto power on and off problem

aweicc — Mon, 20 Aug 2007 04:58:23 GMT

Yeah? I was not aware that I can request the dealer to come to my house and view the problem.

Haha you got the full story, excpet I did not buy the speakers from the dealer, I got it off ebay. I think that might be why the dealer did not suggest comming over to my house to me. But I am paying for the repairs though, I will ring them up tomorrow and ask them.

Re: beolab 6000 auto power on and off problem

Keith Saunders — Mon, 20 Aug 2007 02:38:29 GMT

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 ?

Re: beolab 6000 auto power on and off problem

aweicc — Mon, 20 Aug 2007 01:36:15 GMT

Thanks for all the replys :)

I finally got the speakers back 2 weeks ago, and the dealer is unable to find anything wrong with the speakers, appearently they switched on and off normally in repair shop.

So I guess its my tv, and I just resort to switch off the main power on the wall when I finished with them.

Re: beolab 6000 auto power on and off problem

Keith Saunders — Fri, 06 Jul 2007 11:16:08 GMT

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

Re: beolab 6000 auto power on and off problem

aweicc — Fri, 06 Jul 2007 08:29:26 GMT

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

So they think it could be the ground problem that Keith mentioned.

If all else fails, I can always just switch the speakers off from the wall.

Re: beolab 6000 auto power on and off problem

The Stig - ver. 1.7 — Sat, 30 Jun 2007 10:30:00 GMT

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).

Re: beolab 6000 auto power on and off problem

Keith Saunders — Fri, 29 Jun 2007 10:48:39 GMT

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.

Re: beolab 6000 auto power on and off problem

Keith Saunders — Fri, 29 Jun 2007 10:23:37 GMT

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

Re: beolab 6000 auto power on and off problem

aweicc — Fri, 29 Jun 2007 10:08:42 GMT

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

Re: beolab 6000 auto power on and off problem

Keith Saunders — Mon, 25 Jun 2007 10:09:10 GMT

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.

Re: beolab 6000 auto power on and off problem

aweicc — Mon, 25 Jun 2007 09:41:21 GMT

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

so that speaker is faulty right? probleming shutting off and got stuck in between?

Re: beolab 6000 auto power on and off problem

Keith Saunders — Sat, 23 Jun 2007 12:38:55 GMT

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.

Re: beolab 6000 auto power on and off problem

aweicc — Sat, 23 Jun 2007 08:50:03 GMT

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

Just curious, what is its that ground problem ur talking about, anyway to remedy that ?

And also one of the speaker sometimes the indicator light is yellowish.. not red or green... kinda the color in between. that usually happens when they are shutting off, the other one shut off alright, the light is red, and this one turns yellowish, not quite off, and give out a very notiable humming noise.

Re: beolab 6000 auto power on and off problem

Keith Saunders — Fri, 22 Jun 2007 10:59:31 GMT

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.

Re: beolab 6000 auto power on and off problem

aweicc — Fri, 22 Jun 2007 10:35:20 GMT

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.

but when you said gound, let me describe my situation first.

I got these speakers from danmark, and I am in Ausralia, so I have to go out and buy australian power cables (since both countries use 230-240v, i just need to change power cables so the socket fit).

The plug on the power cables i got doesn't have the third metal piece which is used for ground. it usually works, I don't know why some appliances got them and some don't.

so my point is, has that got anything to do with the ground problem ur talking about? do i need to get a cable with all 3 metal pieces on the plug?

/ \ / \

| = Australian standard plug = the one i got now without the third metal