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Noeliemac
Contributor I
Feb 6, 2023 3:40 PM UTC

blown resistor/ diode?

Hi I have a Sonos s16 amp (2018) 

squirrel blew transformer (yeah would you believe it) hence power surge poping my amp. 
traced it back to L1 resistor/ diode on main board. 
can someone help me with what should I replace it with. Kind Regards Noel 

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5 replies

NoeliemacAuthor
Contributor I
Feb 6, 2023 4:24 PM UTC

Sorry everyone. It’s L2. 

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BrianCH
Lyricist I
Mar 17, 2023 5:59 PM UTC

Hi there, 

I have the exact same issue. After a power outage a few days ago my Sonos Amp popped…..blowing L2.

Anyone have a good suggestion?

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    azpcrepair
    Contributor I
    Aug 31, 2023 1:35 AM UTC

    Hi, Noeliemac, L2 look like is the fuse

     

    I have same problem, but the IC chip U3 blowup and I couldn't read the number. can you please get me that part number?

     

    Thank you

     

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    Andrzej-M
    Contributor I
    Sep 3, 2023 4:38 PM UTC

    Hi. - I really wish Sonos would make a service manual available, I’m trying to fix my Amp at the moment too. I can help you with identifying these items though:
    U3 is marked with U28881 05K CP6S - it looks like it’s manufactured by Texas Instruments. I think this might be the part: https://www.ti.com/lit/ds/symlink/ucc28881.pdf?ts=1693682774913&ref_url=https%253A%252F%252Fwww.google.com%252F

     

    As for L2 - I guess it’s just a small inductor - It is a surface mount part with no markings on it at all… 

    On mine R1262 was blown, but luckily the code was still just about visible - I made it out to be “102” which is a 1Kohm resistor. 

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    buzz
    buzz
    Grand Maestro
    Sep 3, 2023 11:43 PM UTC

    Blown inductors and resistors are usually the victims of larger failures, likely a shorted transistor, voltage regulator, or capacitor. Unless you identify the original failure the replacement inductor or resistor will burn up too.

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