Sonos were the company that didn't want to support their old hardware any longer, so they announced that they were going to brick all the old speakers, rather than let them keep working and not support whatever functionality the new speakers supported. This was unacceptable for old speakers but ,when they announced it, there were still speakers being sold that would be bricked shortly afterwards. The "good" news was that you could get a discount on a brand new piece of technocrap that could be obsoleted at any time, as long as you spend more money. Needless to say, the backlash made them rethink this brilliant plan to increase company revenue at the expense of consumers. Personally, I wouldn't buy a device whose stereo line-in jack can’t be used without registering an account with Sonos, but maybe that is just me.
Another epic fix. I know linear regulators get a bad rap.....but I don't recall that they used to explode quite so often as these SMPSUs seem to - they tended to age gracefully ;). SMSPUs are great when all is well, but they really aren't tolerant of much abuse are they. Occasionally makes one hanker for a good old mains transformer, a bridge and a smokin' hot regulator transistor ;)
Good stuff, i repair these all the time - they have a wealth of different issues. Main thing to do when taking apart is discharge from the bridge rectifier with a discharge pen (definitely get one, they're cheap) as they often hold onto over 300 volts for days. Always enjoy seeing your knowledge at work 👌
I see why you said it was like a Repair Cafe fix I did of switcher, current sense diodes, bridge, and fuse, so I knew after seeing the toasted low ohm resistors the other likely bits you'd have to fix. But I wasn't expecting that secondary diode at all and can't make sense of that. Secondary side faults rarely damage anything on the primary, and vice verse, Most odd. Was the switching chip actually faulty? Probably if the gate drive resistor was also dead.
44:12 - Its OK to solder like this, but there is another method, you can solder two SMD resistors, in Λ shape, where one is left one is right, upright position tilted, in that way, ends are soldered with full width of component, and you are soldering them away from PCB layer (possibly GND or shorting to another signal).
Only started the video but I could swear I've read articles before about Sonos purposively bricking their older speakers with firmware updates. No idea which ones and maybe I've the wrong end of the stick but it's about all I know of the company.
Yeah i believe its the first generation of sonos speakers getting bricked. Although they stopped bricking speakers a few months/years ago cause people where complaining and sonos actually got in some trouble i believe. What sonos did was replace the rootfs with a dummy one which could not have all the functionality of a regualr sonos speaker and they also prevented old gen1 speakers from connecting to the app but i could be wrong
Might be an old thread but the CEO of Blackberry took over and they weren't going to Support old Sonos Bridges.. Everybody with the old type original kit kicked off and they are ok as long as you don't try and upgade them through the app...We.all know what happened to Blackberry.. Ha ha
They didn't "brick" gen 1 devices (this video shows a gen 1 play 1). Sonos moved to a different software system, so their old speakers don't communicate with their new speakers. You can still use the gen 1 speakers exactly how they were originally made - they're just not compatible with the new speaker infrastructure so two different apps are required.
Cheers 👍I said in the video the datasheet, and it looking like the chip was starting to run and then shutdown like it was sensing something not right (although it could have also been the IC faulty)
Today I tried to repair a bosch battery charger. The problem is that many components are erased by the manufacturer. I tried to determine what value of capacitor I should put in place of the suspect one. I thought I was not wrong by much. I plugged it into the mains, no explosion. And after 10 seconds, Boum !🤨 I think I will abandon this repair.
Well done on the repair. I wonder which component failed first, so taking down some others? The diode perhaps? One of the morals of the story: don't buy electronic components from AliExpress (or similar outlets), it's a false economy. 🙂 BTW, when you fix a Repair Cafe product for a video like this is it because the owner has decided not to keep it or do you still end up returning it (where the owner may then make a voluntary donation)?
Your patience and persistence was tested on this one eh..bad parts didn't help. Hope you get refunded on the components that were no good. Troubleshooting this was brilliant, I never could figure out which culprit was next, good job. Nice video and great repair as always, thanks. See ya next time.
Modern chips (since lead free solder) have a shelf life after which the pins are too oxidised for flow soldering. Some can be recovered by cleaning contacts with abrasive and the use of tin/lead solder. Really old chips solder well because old solder cleans up well with ordinary flux. Possibly cheap chips are just old.
That’s the way to fault find keep at it ull find it, an old friend of mine who worked on aircraft electronics used to put a larger fuse in till it didn’t blow and then the faulty item would lol.
Thanks kindly for another excellent video. After seeing this and researching Sonos a bit I think I will stay clear of their products. Glad those capacitors were fully discharged. They can be nasty.
Good fix. I know you like your low melt for component removal but I would recommend wicking it off properly afterwards - if left on it can be brittle and the joint can crack with thermal cycling.
You are done good trouble shooting sir but still i have confusion and i am looking from datasheet it is showing the 100 ohams resistor but you did the fixed 148 ohams how is this possible can you explain and onece again thanks for the sharing good information.
Those three one ohm resistors look to be paralleled so (any) values to achieve a total of 0.3 ohms would fit on those pads - three resistors being used purely for power dissipation reasons.
There are loads of them on Amazon and Aliexpress but note they have embedded magnets that you have to dig out if you do any mechanical clock/watch repair.
