Beolab 8000s defective

Hi

I wonder if someone can help by offering some advice. I have a Beovision 5 which I have recently set up and connected my Beolab 8000's as the front speakers, I have determined that one of them is not working I did this by changing them from one side to the other.

I have noticed that the one not working has a constant green light and does not go red when I put them into standby.

Any advice would be greatly appreciated 

 

Cheers  steve 

Steve:

Hi

I wonder if someone can help by offering some advice. I have a Beovision 5 which I have recently set up and connected my Beolab 8000's as the front speakers, I have determined that one of them is not working I did this by changing them from one side to the other.

I have noticed that the one not working has a constant green light and does not go red when I put them into standby.

Any advice would be greatly appreciated 

 

Cheers  steve 

Steve, have you checked the position switch on the BL8000 in question?  Try moving the switch from L to R and Line and back to where you want it (L or R).  Power down everything and reconnect.  Also try the cables again for how the are seated in the sockets.  Have you tried just swapping the cables round but leaving the speakers where they are?  A green light like that is often a Powerlink cable issue

Dave.

 

Hi Dave

Thanks for your quick reply, I have now partially got it working, that particular speaker now comes on and goes off but I'm still not receiving any sound. I have checked the speaker cables and they are seated properly. So green lights on both speakers and red on standby I have moved the switch from L to R but this didn't do anything in respect of sound.

 

I cannot change the speaker cables around as they are running in the cavity wall, but did change the speakers over and it appears that that particular speaker is defective.

 

steve 

Try first speaker left set to left, speaker right set to right, then switch left speaker to right and right speaker to left, do not move the speakers ,just the switches, If you at any point get sound in the "bad" speaker, you may have a wiring problem. now move the speakers left to right and right to left and try the same again, if there is still no sound in the "bad" speaker, the problem is in the speaker.

Hi Soren

I did as you suggested and there was no sound, I plugged another speaker in I had and there was sound coming out of it, so I think it's the speaker thats  gone defective.

thanks for your help. I wonder if anyone knows a Bang and Olufsen independent engineer on the Costa Del Sol near Estepona. I might start another discussion on the forum asking if anyone knows..

 

cheers steve 

 

This is a common faillure with internal foamrot. Corroded PCB traces (or SMD parts defect) broken by the old foam.

Rather easy job to repair, but a nasty job.  

Good point Beobuddy.  I'd forgotten about the foam issue - not around the drivers but inside the cabinet.  It degrades to a goo and needs replacing. There was another thread about this exact thing a few weeks ago.  It will be worth opening it up and having a look and a clean out.

Dave.

Thanks for everyone's advice, I'd rather stay away from trying to repair it myself, I'm in Spain and will drop by the shop in pauto Banus on Thursday 

 

cheers Steve 

If it is the foam goo problem, I suspect they may just tell you that the PCB needs replacing - which it probably doesn't. The old foam will need replacing and the PCB cleaned. They may also just tell you it can't be fixed. Apologies for my pessimism but that seems to be how a lot of B&O repair shops treat people these days. It's rubbish. Like telling you a CD mechanism needs to be replaced when often just replacement of one capacitor can fix the problem.

I hope you have better luck and they are professional about it. Please report back on their findings.

Dave.

Hi Dave

With foam rot. Does the foam make a real difference or is it very minor? I have cleared all the rotted foam from my Beolab 8000 after one stopped working from the rotted foam damaging it. I repaired it myself and like you say its not difficult. If I don't need the foam, I'd rather not replace it. Did you source the foam yourself or did you buy from B&O?

Thank you for your help.

Ben

Hi Ben,

I've never actually done this. I do have a pair of BL8000's but so far there are no problems. The foam must be there for a reason - for sound reasons or insulation of some sort/baffling.

Didn't the other thread on this subject say where an alternative foam could be sourced? It may be worth asking a dealer how much the foam would be to buy from B&O.

Dave.

You do need to replace all the foam. That means also the foam behind the drivers.

If you don't replace the foam in time, then there is a change that you will find lots of deteriotated foam through the entire amplifier section. Specially when you had a party at home ;-)

Cleaning the old foam isn't always the solution. Broken traces often appear as result after cleaning. And be aware that each BL8000 is slightly different filled with this foam. SOme have the easy traces to repair as where others have broken traces on different parts of the amplifier. Even the active filter inside (which stands vertical on the mainboard and is hold in position with the same foam) can be affected.

Sometimes shortned transistors caused by the foam are the culpritt of the malfunction. But most are repairable.

But I can imagine that most dealers are not capable of soldering smd parts.

 

But you need to replace the foam. The new foam creates a closed section behind the drivers. Without that the respons will be influenced in a negative way.

Thanks for the replies. I will have to look into this. 

Ben

Just an update, I took the speaker to a B & O service centre which is just outside Marbella, it's actually in Estepona and I had a PCB board a new Tweeter fitted, it was also calibrated, when I got it home and connected it up it sounded great. A good turnaround, just over one day.

The cost of this came to €283 just over £200, cheaper than trying to source a new speaker.

cheers Steve 

Steve

Good to hear things worked out fine for you.

Can you share the address of the Estepona service centre?

Hi Jans

the address is

Urb jardines de Atalaya

Avenide de las golondrinas n53

29680 Estepona

952 88 02 64

Steve:

Hi Jans

the address is

Urb jardines de Atalaya

Avenide de las golondrinas n53

29680 Estepona

952 88 02 64

Gracias!