Hello! I am currently working on repairing a Sonos Connect S15. I have both a working and non working one. By non working, I mean that it is very very quiet. I have looked through the thread, and compared some of the suggestions to my case.
As @jmag99 said, the 22uf cap right after the 12v reg are reading around 150uf using a DMM. This is odd to me because even when the working one has this reading, it is, well, working. I measured the voltage where one of the pictures said to (I believe the mute line) and on the working one it was at 12v but on the broken it was reading <.5.
I have also measured the capacitance on the 2 caps recommended by @timc995 and both of them are between 2.2 and 2.8uf.
I really want to get this figured out as I have about 5 more connects with these same symptoms from our previous homes audio setup. I am happy to provide any more readings.
Also, what is the best way to measure the values when the main board goes on top of the audio board. There is not good way to probe, and I worry about shorting something.
Thanks in advance.
As @jmag99 said, the 22uf cap right after the 12v reg are reading around 150uf using a DMM. This is odd to me because even when the working one has this reading, it is, well, working. I measured the voltage where one of the pictures said to (I believe the mute line) and on the working one it was at 12v but on the broken it was reading <.5.
I have also measured the capacitance on the 2 caps recommended by @timc995 and both of them are between 2.2 and 2.8uf.
I really want to get this figured out as I have about 5 more connects with these same symptoms from our previous homes audio setup. I am happy to provide any more readings.
Also, what is the best way to measure the values when the main board goes on top of the audio board. There is not good way to probe, and I worry about shorting something.
Thanks in advance.
First step to debugging these is to check the power supply board. Check for any bulging capacitors and replace them first.
When I debugged mine, I started by just supplying the raw voltages to the analog board and probing around with a DMM. I did not need to put the mainboard on there, as the analog board doesn't have much control. The muting circuit is all analog. Based on your description, I think it's a high likelihood that you have the same issue that I did. I ended up repairing 4 S15's and they all had the same problem. I suggest you apply the raw DC voltages and check the regulator output of the 12V reg.
When I debugged mine, I started by just supplying the raw voltages to the analog board and probing around with a DMM. I did not need to put the mainboard on there, as the analog board doesn't have much control. The muting circuit is all analog. Based on your description, I think it's a high likelihood that you have the same issue that I did. I ended up repairing 4 S15's and they all had the same problem. I suggest you apply the raw DC voltages and check the regulator output of the 12V reg.
Thanks for the response. I was really hoping it was the same as your issue, however I am getting caught up in the fact that the working one has an out of spec cap (160uf where you said it should measure 22) in the same way that the broken one has. What would cause one working and one not? I will go poke around the power supply later today and see if there are any out of spec caps.