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The PWM is not switching therefore no secondary voltages will show up. Yes that is with the PWM installed.

5M02659R, 5M0265R, 5M0280

I pulled the inductor and its good Briefly stated, if all three datasgeet of regulation canwithin prespecified limits. I will share a troubleshooting slide on the 28V supply when I get it working reliably.

Datasheet was dreading pulling that component. We will get good at this some day, maybe Sonos will hire us?? Active topics Beam Music Quality 4 minutes ago ZP80 cuts out when grouped with Sonos 1’s icon 5 minutes ago Playback stops all the time!!

5MR PDF 데이터시트 – KA5MR – Fairchild

I tried a desoldering pen too, but to no avail. That PWM and heat sink took a good 45 minutes to get off along with about 2 feet of desoldering braid. Based on the schematic, this part looks blown to me.


Finding this short 5m0625r not easy! I’m guessing that will take a breadboard. Sonos and Sonos product names are trademarks or registered trademarks of Sonos, Inc.

This was a great learning experience and has given me the confidence to perhaps start hunting for bad Sonos products on eBay and fix em up. That sent me on a Youtube and reading spree that gave me the tools and confidence to diagnose and fix the problems.

Also, the dim bulb was brilliant. Looks like the replacement is a KA5MR.

Keep in mind it was DMM tested on board and I have not removed it. The 2 RTN points on the transformer are showing 0L.

Community Advanced setups Repair ZP It has the following features: I just got notice the unit shipped and will be here next week. They show nothing using a 60W bulb.

Multisim and Ultiboard

It will distribute the heat much better. SPS Idrain 1 2 Figure I am surprised I didn’t destroy contacts as I really had to put that iron on for a while to get that solder to move. To adapt the SMPS switching frequency in the synchronized mode. Speaker sets Products Accessories Learn Support.


Repair ZP | Sonos Community

The auction description says it does not power on and I am hoping to use this thread to troubleshoot and fix it. I just found a site with some pretty good directions on building the dim bulb tester: Actually I am getting no power on the secondary winding testing 1 and 2 for 3.

The best way to get it off was keep cracking at it with desoldering braid. Share something, connect with others! If there is no blinking lights, then you prob have a blown fuse and no bias converter.

Thetypically 12 dB. I’ll post when I get them and try it out.