Play 3 Powersupply fault.

5 year old unit, many things could contribute to a power issue.

Mine has a burn mark in exactly the same place as on the pictures. Must be just a coincidence we have the same board and symptom.

Most rarely happen. Don't know actual cause.

Most rarely happen. Don't know actual cause. Maybe that part is susceptible to power surges.

Mine has a burn mark in exactly the same place as on the pictures!!! It is not a coincidence We Have The Same board and symptoms !!! SONOS Should take responsibility for this before it happens a accident, a home burn down ...... In Sweden we have strictly laws about this and the the label can be prohibited to be sold! But there is no one who wants to know about the problem at SONOS in SWEDEN!
Very sad if it should happen an accident, before SONOS reacting. Especially when the products are so incredible in itself!

Hi All,

Bearing in mind only a few of us will take these units apart and then only a few of that number will take the time to come on here, I am certain this is a design fault with the Sonos 3.

I have the same board in my Sonos 3 P/N: RN-002657
Capacitor C306 has blown exactly as others have experienced and destroyed part of the circuit board, due to over heating.

As an electronics engineer of some 45 years standing I can confirm there is something very wrong with this product and Sonos should be dealing with it and accepting the fault.

I will attempt a repair but think the circuit board may be too far gone. We shall see.

Best regards


Chris

jamietaylor13,

First post! Welcome to the forums.

SONOS does not support DIY service in any way. I know that this policy chaffs some, but it probably eliminates some legal risk and saves a lot of time supporting DIY's of various skill levels. SONOS is not unique for establishing this policy.

Burnt traces and capacitors are usually the victim of a larger drama.
Hi my sonos 3 fell and the transformer on the power board snapped off the base, do you know of a replacement transformer I can use?
Thank you.

Hi everyone, interesting discussion but I want to make sure that anyone who gets to this thread knows not to open your Sonos products if you're looking to do any sort of replacement or repair with us.

Sonos products are not designed to be opened and repaired out in the world, and we do not provide any resources or replacement components for doing this. The warranty services for Sonos components also does not cover units that have been opened in any way.

Even if your player is outside the standard warranty time, we can probably still assist with a replacement as long as it hasn't been opened. There will likely be a fee for the replacement if it's out of warranty.

Anytime a unit fails, we want them to come back to us when possible so that we can review what happened and make adjustments if there's need.

If you have a PLAY:3 that's not powering up, or think there's any other hardware issue for that matter, feel free to give us a call on our support line before trying to open it up.

Thanks!

Same issue: dead PLAY:3 and scorched PCB trace between the bridge rectifier and C306.

Thanks to mave64 for sharing their troubleshooting procedure - remove C306 and add a jumper from the + lead of C319 to the + terminal of the bridge rectifier to bypass the blown PCB trace. I was then able to measure ~5V on the supply output and verify that everything else was working. After replacing all three filter caps, my PLAY:3 is up and running again!

Also thanks to Sonos for hosting this forum and keeping this thread around. They're not the only equipment manufacturer to be bitten by a bad batch of electrolytics (that failed 6 years down the road).