subwoofer not working anymore

Question

Hello, I have a problem with my subwoofer that works through my LG soundbar. The power supply fuse of the subwoofer keeps blowing, and I don't know what could be causing it. If you could advise me, please. Thank you in advance.

Jojolaguitare · Answer

Hi.  What is the brand and model of this SUB?  A + ... ( absent this afternoon )  -- No need to rush, you have to leave on time ...

evadevonn · Answer

It's an LG model SHS34.

Jojolaguitare · Answer

Hi  Sorry I didn't get home early last night. To get back to the issue, I couldn't find any detailed specifications online for your soundbar apart from a photo and that the sub is WiFi-enabled. So your sub is powered. Does the fuse blow as soon as you turn on your sub or does it happen during music playback?  P.S.: Don't use a fuse with a higher rating than recommended for now.  See you  -- No need to rush, you have to leave on time ...

Jojolaguitare · Answer

Hi.  So, two hypotheses for the failure. Either the power board, the transformer itself is short-circuited on the secondary side, or if it's a direct supply, the HV/LV transformer might also be blown, or in both cases, the diode bridge, but in that case, it’s more likely that the secondary fuse would blow. 2nd hypothesis: One of the three amplifier integrated circuits could be short-circuited, therefore blown, of course, almost certainly the one that amplifies your sub because it "pushes" harder than the other two channels. These failures are not too serious and are repairable, of course, but not by yourself as you need to have a minimum amount of equipment, but definitely an oscilloscope, either single or dual trace. I think you can understand that remote troubleshooting is impossible because even before confirming the failure, there are numerous control measurements to perform. Unfortunately, only the repair technician remains.  Catch you later...  P.S.: Check if the power cord shows any signs of damage (if you have a multimeter, this check will be easy)  These are just suggestions... Catch you later  -- No need to rush; you need to leave on time...

Jojolaguitare · Answer

Hello.  You're welcome. The main thing is that you were able to sort yourself out.  Take care ... See you later  -- There's no need to rush, you just need to leave on time ...

Subwoofer not working anymore

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