Hi Sir

I have a unit that do not power on and I will try to repair it but I have no idea how to open the unit. Can you help me with tips to open the box ? Thanks in advance for your help. Best regards Marcos Silva from Rio de Janeiro - Brazil

 

MOD NOTE: This was split from the following thread to prevent hijacking.

https://forum.allaboutcircuits.com/threads/how-to-diagnose-b-w-speaker-protect-mode.127022

@marcoscc2002: You need to provide a lot more detail about just what unit is that you have that you are working with. Is it the exact same unit as in the other thread?

 

Thanks sir to move my thread to the correct place.

I have a B&W A7 wireless speaker box and I can not power on the unit.
The unit was working very well for long time and few weeks ago stop to work. Apparently this is a power supply problem because no current is draw for the 120VAC (Totally open circuit measured in the power outlet).
I need to troubleshooting the power supply, but I need to open the unit case to do that and after a very detailed inspection I can not see how to open the unit to have access to circuits inside the A7 wireless speaker system.
So, I need some help to tell me how is the procedure to open the B&W A7 to have access to its power supply to repair it.

Thanks in advance for any help

Best regards Marcos Silva

 

 

How about pictures showing the other side, the bottom and the top.

 

 

I suspect you need similar special tools that are made for servicing tablets etc, these are thin blades etc, that pry back the edge of the box etc to disclose the plastic latches.
Max.

 

I am not 100% sure because it has been a while since I opened one up. If I remember right there are tabs that need to release the sleeve. This is like a cover that covers the box. Once you take that off with access from the bottom then I think there was 6 to 8 screws holding the unit together.

From the bottom, slide pressure to area behind sleeve to release, slide cover off and remove screws. I will try and find more info. Sadly it has been at least 3 years since I took one apart.

 

Thanks for the pictures. There are no obvious connectors. So I believe @MaxHeadRoom has the right idea. And @IMP002017 seems to have the right idea.