Marshall Stanmore II voice with the google assistant built-in

[dysk1]

Hello everyone,

I'm Marek and I'm from Poland.
I bought on our auction site 5 pieces of damaged Marchalla speakers. I'm an electronics engineer and thought I would fix them myself. I was very disappointed with the construction inside.
As power amplifiers there are 2x TAS5711. Everything is controlled by a ready-made module from Frontier Silicon MINUET FS5332. In the attachment I send pictures of the PCB. All 5 pcs have the same fault. The power supplies have 24V at the output. After connecting the power supply from the lab power supply, you can see how the current floats from 0.04 - 0.26A. No buttons work and no signs of life on the front panel. I suspect a software fault.
Please help me in repairing this speaker.

Someone did not disable access to such a speaker and it can be accessed through an external IP. http://59.11.201.30/

[CapLeaker]

Re: Marshall Stanmore II voice with the google assistant built-in

Does it have something like an UART? Maybe hook your computer up to it and see what’s going on. You could also get a dump from a working speaker and copy the working flash to your non working ones.
Is there a reset procedure for it?

[dysk1]

Re: Marshall Stanmore II voice with the google assistant built-in

Does it have something like an UART? Maybe hook your computer up to it and see what's going on. You could also get a dump from a working speaker and copy the working flash to your non working ones.
Is there a reset procedure for it?

The reset procedure is like this: "Press and hold both the Source button and the play/pause button for 7 seconds," but it doesn't do anything. I can't see the UART, but there is a USB service port. I opened this FS5332 and made an overview shot. All voltages on the board are correct.
Located layouts:
88DE3006-BTK2 Marvell
NT5CC256M16EP-DI Nanya
88W8887-NAA2 Marvell
TC58NVG2S0HTAI0 TOSHIBA
Unfortunately, I have nowhere to get a working speaker. The seller has 50 more speakers broken in the same way. Very strange case.

[CapLeaker]

Re: Marshall Stanmore II voice with the google assistant built-in

So what happens if you remote into the speaker using that IP? Does anything happen?
Right there were that module plugs into the other board, there are three pads labeled GND, TX, RX. Probe it if it could be TTL. See what it does.

[budwich]

Re: Marshall Stanmore II voice with the google assistant built-in

The reset procedure is like this: "Press and hold both the Source button and the play/pause button for 7 seconds," but it doesn't do anything. I can't see the UART, but there is a USB service port. I opened this FS5332 and made an overview shot. All voltages on the board are correct.
Located layouts:
88DE3006-BTK2 Marvell
NT5CC256M16EP-DI Nanya
88W8887-NAA2 Marvell
TC58NVG2S0HTAI0 TOSHIBA
Unfortunately, I have nowhere to get a working speaker. The seller has 50 more speakers broken in the same way. Very strange case.

You indicated the reset procedure... BUT how are you attempting to turn the unit on. The reset only clears the unit back to factory settings... it doesn't turn the unit on.

[dysk1]

Re: Marshall Stanmore II voice with the google assistant built-in

3 out of 5 speakers were repaired.

The first repaired after several reset attempts.
In the second one, I found a capacitor short-circuited.
In the third, I found a damaged resistor.

I have not fixed the fourth one yet, based on the current consumption and the thermal imaging camera, I can see that the linux itself is loading but it probably does not execute the program.

The fifth play is still ahead of me.

[CapLeaker]

Re: Marshall Stanmore II voice with the google assistant built-in

Sounds like you are making progress!

[malycinek]

Re: Marshall Stanmore II voice with the google assistant built-in

3 out of 5 speakers were repaired.

The first repaired after several reset attempts.
In the second one, I found a capacitor short-circuited.
In the third, I found a damaged resistor.

I have not fixed the fourth one yet, based on the current consumption and the thermal imaging camera, I can see that the linux itself is loading but it probably does not execute the program.

The fifth play is still ahead of me.

Hey. I got problem with Acton II Voice, problem is it is not starting. Top panel is not working, it looks like all voltages are present. Strange thing is that RT8059 which is powering top panel diodes (3.3V) is starting soo long. (like 20-30 secs after powering speaker on). Have you maybe found similiar problem? Maybe know reason basing on your big experience? Looking forward to hearing from you!

[jules91]

Re: Marshall Stanmore II voice with the google assistant built-in

Hey. I got problem with Acton II Voice, problem is it is not starting. Top panel is not working, it looks like all voltages are present. Strange thing is that RT8059 which is powering top panel diodes (3.3V) is starting soo long. (like 20-30 secs after powering speaker on). Have you maybe found similiar problem? Maybe know reason basing on your big experience? Looking forward to hearing from you!

Hi
I have also a Marshall Acton II voice with similar issues.
When I power on, the 4 leds on the front panel blink 4 times but nothing append after.

Do you have find a good solution with your Marshall speaker about it?

[malycinek]

Re: Marshall Stanmore II voice with the google assistant built-in

Hi
I have also a Marshall Acton II voice with similar issues.
When I power on, the 4 leds on the front panel blink 4 times but nothing append after.

Do you have find a good solution with your Marshall speaker about it?

No solution. In my case leds are not working.

[jules91]

Re: Marshall Stanmore II voice with the google assistant built-in

No solution. In my case leds are not working.

I think the problem may be a capacitor. Try to see if yours looks normal or not and if possible test them.

[malycinek]

Re: Marshall Stanmore II voice with the google assistant built-in

I checked capacitors, no shortcircuits, all voltages present. Still not working.

[yajdeeks]

Hello, i need dump from nand memory

[malycinek]

I have two NAND dumps from different damaged Marshall Acton II speakers. Maybe someone will find them useful. I'm not sure if they are working dumps, but if someone can check and make use of them, please let me know.

[Rocinante]

I have two NAND dumps from different damaged Marshall Acton II speakers. Maybe someone will find them useful. I'm not sure if they are working dumps, but if someone can check and make use of them, please let me know.

Hi there,
I have the same issue as you. I have a Stanmore II with voice assistant, and I can't find any problems with the boards. All voltages are present, but it doesn't power up. The small board gets a little warm, as dysk1 mentioned and as shown in the thermal picture.
Has anyone tried to access the console via the GND, TX, and RX pins near the large black connector? Maybe I can see if it boots correctly.
Is it possible to reflash the NAND through these pins? Or should I remove the Toshiba chip and program it with a TL866 or something similar?
Also, how did you extract the dumps?
Thanks!

[malycinek]

Hey, with console you can check if system is booting. You need serial to usb adapter to open console. You can program toshiba nand after desoldering and putting into adapter and programmer. It may work with tl866. Im pretty sure your firmware is also corrupted.

[Rocinante]

Hey, with console you can check if system is booting. You need serial to usb adapter to open console. You can program toshiba nand after desoldering and putting into adapter and programmer. It may work with tl866. Im pretty sure your firmware is also corrupted.

I think you are right. This is what i get on console, in loop:
[QUOTE][/QUOTEGalois

->tw:irq enable: 0x2000

->tw:fiq disable: 0x2000

->tw:kernel start ...

->tw:free memory(0xb1090) at 0x204af70

->tw:TEE TW version 1.12.21, build time 15-04-08 21:01

->tw:proc log buf: 11080000, ctl: 11180000

->tw:init module 2029420

->tw:init module 2037ca8

->tw:init module 203b4cc

->tw:init module 20389f0

->tw:init module 203c33c]

Did you know how to solve it? I am able to desolder the toshiba chip and i can buy a programmer, but im not sure how to get the firmware. I saw 2 in a previous post but i dont want to invest in a programmer if im not sure i have a working nand dump. Thanks!

[malycinek]

Hey, it is exacly same console output as mine. So your firmware is corrupted. Same as mine. We need to find firmware dump to fix this.

[Rocinante]

Hey, it is exacly same console output as mine. So your firmware is corrupted. Same as mine. We need to find firmware dump to fix this.

You didnt try the dumps from post 14?

[malycinek]

These are mine dumps. They are corrupted sadly, but maybe they will help someone to repair dump or something. I think experienced person can find broken block and replace it, thats why i attached it.