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Some of the choices that Sonos has made are exotic, like the integrated PWM they use for the bias converter. LED Drive smps circuit diagram Abstract: It will distribute the heat much better.

If so smokin’ deal! Previous 1 1 of That is with the dim bulb installed so it is probably a little bit higher. Thetypically 12 dB. Replace the blown fuse with a V light bulb.

5M02659R, 5M0265R, 5M0280

Previous 1 2 Share Tweet Share datasheft Share whatsapp. A 60 watt bulb seemed to do the trick for finding the failed component. Figure shows a detailed block diagram. Playback stops all the time!!


5MR – FCS – PMIC – AC DC Converters, Offline Switchers – Kynix Semiconductor

I’m really hoping this is the bad 5m265r since my bulb is full dim after the caps charges and this PWM is removed. Nobody carries some of these parts in the US, so I need a long wait from China yes not Mouser or Digikey – seems to be special order. The best way to get it off was keep cracking at it with desoldering braid.

I’m guessing the short is somewhere in that area. I just found a site with dtaasheet pretty good directions on building the dim bulb tester: Speaker sets Products Accessories Learn Support.

I really want to encourage people to post in these forums for help. To adapt the SMPS switching frequency in the synchronized mode. That sent me on a Youtube and reading spree that gave me the tools and confidence to diagnose and fix the problems.

I get some voltage on the xatasheet like 10vbut nothing on the secondary. I tried to short those too, but got nothing. Savings to fix it myself: What a great tool to build. I will share a troubleshooting slide on the 28V supply when I get it working reliably.


Getting it off components was a chore. The pulse diagram of Fig. Is there an internal fuse for this unit? Could that be that the inductor has a short? The continuity is in both directions.

I would like to share a couple of items that may help others The dim light is indeed bright. They use a non-integrated pwm for the amp power supply, also not available from Mouser and the like.

The circuit is divided into several blocks which are describedtyp. This weekend I am going to build a dim bulb tester and am planning on following Daniel’s blog on disassembling the AMP. I have no idea what kind of solder that Sonos xatasheet, but it is insane. I tried a desoldering pen too, but to no avail.

(PDF) 5M0265R Datasheet download

Also, the dim bulb was brilliant. Thanks for all the help! Bob is your Uncle!