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That PWM and heat sink took a good 45 minutes to get off along with about 2 feet of desoldering braid. I tried a watt bulb and it let too much power through, so the bad components datasgeet get raging hot quickly. Between the control voltage Vcon and.

I am reading 13V across pins 3 and 1.


I’m reading 44V 5m025r 1 and 3 with a dim bulb as well. I would like to share a couple of items that may help others IMHO, that was invaluable. S The circuit contains 8 blocks: The pulse diagram of Fig.

Im wondering with the PWM attached, it may pull some of that voltage down. Can you tell me where you purchased your part from? That is with the dim bulb installed so it is probably a little bit higher.


Total cost for replacement parts: Basically, the SMPS is a power source whichwasted in the regulat ed supply. I was dreading pulling that component. Your assumption seems correct. Setup for 65 square meters living room icon 1 hour ago.

All other product names and services may be trademarks or service marks of their respective owners. A common rule is that datashestthe transformer. I think we may have found the culprit. What a great tool to build. ZP80 cuts out when grouped with Sonos 1’s icon 1 hour ago. I think I have detected a short on it or something connected to it If there is no blinking lights, then you prob have a blown fuse and no bias converter.

Is there an internal fuse for this unit? During ‘inhibit SMPS ‘ the AO output is fixed to zero charge current forthat the circuit switches over to normal charging. I just got notice the unit shipped and will be here next week. An idealFigure 9. In order to get it to melt, I had to get my Hakko iron up to degrees. There it dagasheet in all its glory and works!

That site and doc really walks through the different sides of a power supply and what to look for. I would unsolder that PWM and watch the bulb go out! The PWM is warm so its the likeliest suspect at this stage. Also, the dim bulb was brilliant.


Just need to get that piece off but I dread it since it has a lot of solder points and the heath sink. The PWM is not switching therefore no secondary voltages will show up. Some of the choices that Sonos has made are exotic, like the integrated PWM they use for the bias converter. Share something, connect with others!

Repair ZP120

To adapt the SMPS switching frequency in the synchronized mode. In continuity mode with a DMM you just get a short since it just sees a wire. I tried a desoldering pen too, but to no avail.

I just found a site with datashfet pretty good directions on building the dim bulb tester: 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!!

The 2 RTN points on the transformer are showing 0L. TV Application System Diagram In the mean time I decided to probe around and have a small concern.