Beosound 9000 MKII – Masterlink not working

[adyan]

Hello,

hopfully there is someone who can point me in the right direction …

I did some testing and likely had a bad/wrong cable and since the masterlink port isn´t working anymore. As far as I can measure all power on pcb32 seems to be ok, also I can´t find any fault or bad component on pcb32.

Wierd is:
When a original b&o masterlink/RJ45 cable is connected (and only the cable) to the masterlink port it is not possible to control the beosound anymore… After power off and disconnecting the cable and power on again everything works again as expected. This means as soon as ML CONNECT is activated because of the cable control is not possible…

I´m not sure if this is a problem with pcb32 or the processor?!

Are there any further tests or measurements I can do?

Maybe there is someone who has a pcb32 to sell or lend, so I have the chance to find the problem.

Thanks in advance.
Christian

[Peter Fraser]

Hello Adyan,

In the past, I’ve encountered instances where the BeoSound 9000 would lock up when the MasterLink was connected.
On powering up, the unit would remain in standby mode. It’s difficult to say for certain if you’re experiencing the same issue.
This was caused by PCB32/PCB20.
They were replaced at the time.
Without physically inspecting the PCB, it is hard to diagnose down to component level.

As a first step, I recommend checking the MasterLink socket for any physical damage.
I’ve occasionally seen bent pins cause problems.

Unfortunately, this PCB is no longer available as a new part, so we do not sell or loan PCBs.
Prices for used parts on eBay have increased significantly, but it may be worth checking there for availability.

If you’re based in the UK, we can offer PCB repair services.
We understand that sending the entire unit isn’t always practical.
For details on PCB repair and inspection fees, please contact Multicare Electronics directly.
Contact at Multicare Electronics
Note:
If you’re located in the UK and can easily get to Leeds, I recommend bringing in the entire unit, as the inspection fee is the same.
Be sure to specify that you are only seeking repair of the MasterLink.

If you’re outside the UK, I suggest contacting your local Bang & Olufsen service centre to check if they offer PCB repair services.
All Bang & Olufsen Locations | High End Televisions, Sound Systems, Loudspeakers

 

Kind regards,
Pete

Signature: Peter Fraser
Service Technician
Multicare Electronics

[adyan]

Hello Peter,

thanks for your answer and suggestions.

Will have a close look at the connector again but I think thats not the problem.

As I had no luck with contacting B&O Classic Service in germany my only option will probably be contacting Multicare and ask for pcb32 check/repair.

 

Thanks and Regards

Christian

[Author]

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