Michael wrote:

Honestly get it served by certified personnel. It's not a good idea to service on your own.

+1

Listening to an 'unbalanced sound' from a pair of BL5's must be like being shot by a machine gun ;-(

MM

ESBOSS wrote:

Thank you for your advice!

I think it's better to listen to an unbalanced sound than loud shots from a machine gun costing 20k bucks))) How much do I understand for setting the "Service Tool" is used?

It would be good to know the expert's opinion about what the problem is on the DSP board. Is It can be possible to repair the DSP board, since it is sold only together with four amplifiers, which are still working. This is perhaps the best invention of B & O and I hope they have it patented, what would competitors do not do so)

Hi,

Without knowing exactly what is happening with your speaker, it would be impossible for me to guess at how to diagnose or repair it. Sorry...

Cheers
-geoff

I think experts B&O know exactly the cause of the shots by the symptoms.

But this is like a great military secret for the users :)

I have experience in electronics. Once in the 80's, even the amplifier of class D did with their hands. Of course, the experience has degraded, but with the replacement of blocks I'll figure it out myself. I think not worse than the well-known certified personnel. Sometimes it's interesting to do something myself

ESBOSS wrote:

I have experience in electronics. Once in the 80's, even the amplifier of class D did with their hands. Of course, the experience has degraded, but with the replacement of blocks I'll figure it out myself. I think not worse than the well-known certified personnel. Sometimes it's interesting to do something myself

Thank you for your caution. I understand. I would just add that this expensive speaker did not even make Picasso auto-turn on and off if you do not use a PowerLink. Maybe someone from B & O will explain why it was necessary to do the line and spdf. For the user's ability to have an additional B & O remote? They like Apple want to create an ecosystem but it turns out funny.

Thank you for your caution. I understand. I would just add that this expensive speaker did not even make Picasso auto-turn on and off if you do not use a PowerLink. Maybe someone from B & O will explain why it was necessary to do the line and spdf. For the user's ability to have an additional B & O remote? They like Apple want to create an ecosystem but it turns out funny.

ESBOSS,

With all due respect the above posts are correct, also in your best interest. Tinkering with 12k$ DSP controlled loudspeakers yourself is really not a great idea in my opinion as well.

Towards your comment on how the BL5 works in terms of connectivity, well the BL5 are basically unique from b&o line up in that they can use Powerlink data for triggering and volume control. Plus analogue audio via powerlink or digital audio spdif. So yes this exact model is sort of odd using anything other than Beosound 5.

As I am sure you're aware, the BL5 along with all modern WISA loudspeakers are no longer analogue. Even analogue inputs pass A/D > DSP > D/A > amps. This is indeed one major downside of anything completely under computer control, especially one that is quite obscure and not having access to the software.

Without having access to spare known working boards (could be switching supply, DSP board, amps..) and software configuration tool, you will be having a nearly impossible time troubleshooting. Yes b&o tech will not do board-level repairs, only swap entire boards because why chance ineffective repair on such an expensive device - like a car it is guaranteed to work simply by replacing the entire board.

>>>Yes b&o tech will not do board-level repairs<<<

I'll correct you. Boards of B & O amplifiers ICE 250 or ICE 1000 can be changed. For this, you need first to demontage the DSP board. But you can not replace the board DSP separately.

It's like in a car. You can buy a wheel assembly or an rim, but you can not buy a tire ))) 

B&O is cool :)

Changing a board is not board level repair. In the parlance of my career, that's called replacing an LRU, line replaceable unit. It's the lowest level of maintenance done at depot level, and also at almost all service departments. Any diagnostics and repair of individual components on a board are done at the manufacturer, this is true for military equipment as well as consumer electronics, I've never seen lower than board level replacement at dealers lately. When I worked in a stereo shop we did have a service tech who did component level repairs, but that was in the days before ICs and surface mount devices. Changing a bad transistor or resistor is a lot different than repairing a DSP driven board.

I wouldn't underestimate the significance of the calibration information you'd lose by swapping a board without proper procedures to clone the info to the new board. I know for the older, far simpler Beolabs, unless you were lucky enough to get drivers that had the same characteristics as the adjustments in the speaker were set to accept, the sonic differences could be striking. I can only think that the kinds of mismatches in a system that is as finely calibrated for different parameters as the BL5 would be a more critical issue.