Dead Play:5 need schematics or tips

I have no idea, but can tell me somebody, what part it is,it is brocken. There is writtrn "2F8".

 

 

I found an old Play:5 board, and this was labelled 2fx on the one I found.  That also doesn’t come up, but if I had to guess, I’d say it is an NPN transistor BC850W.  That’s based on the ‘2f’ part of the code(s), and the fact that it’s an SOT-323 device.  https://www.s-manuals.com/smd/2f

Im find another short at tis part:

I guess there is written on:

E48 9558 or something like this.

It is blurred, so i cannot read ut as well.

Can someone help me and can tell me, what part it is?

Could it be this one?

https://www.alldatasheet.net/datasheet-pdf/pdf/1275376/ONSEMI/1SMB5955BT3G.html

On the part is written "ON",the Logo from ON Semiconductor.

It looks to me like it is “E43” and 955B or maybe 95513… that last bit doesn’t really seem to be a B or a 13, but it looks even less like an 8 to me.

I’d also be surprised to have a 170 volt zener diode in this circuit…

I look all the time for the spare part, I've also looked at another box of mine, it says "E43 955B". So apparently this 955B is a kind of article number. And when I look at these numbers and add onsemi as the manufacturer, according to their products I always come to 1SMB5955B, with the first 5 probably indicating the tolerance.I don't know a lot about electronics and their spare parts.Am I doing something wrong with my search or what would happen if I put this part in and it's the wrong one?

Hi all,

I would love some help debugging my unfortunately broken play 5 gen 1. I got off the phone with sonos and the best they can do is repair it for the same cost as basically buying a brand new one. I really don’t want this to go to landfill but I’ve exhausted my expertise on this device. 

 

symptoms: 

AC side of the device: OK - I get roughly 320V DC from the bridge rectifier.

I get a range of voltages supplied to the PWM chip from 9-20V. Oscillating at roughly a 4 second frequency.

the output side of the transformer is sitting at 2V roughly. I think this means that the mosfet is okay which switches the transformer. Pointing me back at the PWM chip. 
 

Current attempts at solving the problem:
 

I’ve poked and prodded at all the small resistors but wasn’t able to find any broken ones next to the PWM chip or on the feedback loop to it. I can’t work out what type these transistors are so I can’t test them.

ive replaced the PWM chip and get the exact same functionality as before. 

Does anyone have any advice on how to verify these transistors? Or anyone fixed a device with similar problems and have some debugging advice on how to break the problem down into smaller search area. 
 

Thanks! 

I look all the time for the spare part, I've also looked at another box of mine, it says "E43 955B". So apparently this 955B is a kind of article number. And when I look at these numbers and add onsemi as the manufacturer, according to their products I always come to 1SMB5955B, with the first 5 probably indicating the tolerance.I don't know a lot about electronics and their spare parts.Am I doing something wrong with my search or what would happen if I put this part in and it's the wrong one?

That matches the labelling I had found, so I guess it is the right part.

How do you actually know it’s broken?  It can be hard to confirm bad components when in circuit.  You might want to try removing it and then check it for continuity, and test using diode mode on your meter in both directions.

There are few examples in this thread about finding various broken components, where replacing/repairing them fix similar symptoms to what you have.  However, I have seen some bad Play:5 boards that I was never able to find the bad component and was unable to fix.

I’d recommend replacing the power supply.  It’s pretty cheap to install a 24v DC power supply (either external, or inside the case if you can get one to fit).  You would need a 24V->12V converter to provide the 12V supply too.  All of this is probably under $30.  This is described on this forum (I think in this thread but not certain).

Hello, 

i have another Problem with my Play 5 Gen 1.

One of the Middle Speakers is Not working. I have buy the speaker as "completely dead", repared it and i dont know if the speaker is working before. Is there any idea what i habe to check? The rightmiddle speaker is Not working.