Question about Harman Kardon HK 3480 Receiver

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HK 3480 sound suddenly cuts out

I recieved this reciver as gift in december. after a few months of not having speakers, i bought some JBL's and everything was sounding great. however, now i'll be listening to music (mostly via a connected laptop) and it will just cut out.

i thought this maybe something odd, so i then just put the reciever on AM radio same thing, so obviously it has nothing to do with the cables. but just to be sure i've checked the cables (reciever -> amplifier & laptop -> reciever) nothing wrong. i'm not hitting mute on the remote, i'm not turning the wrong speakers on or off (i.e. speakers A instead of speakers B), and the power does not go out.

i know it's still under warranty. i just hope i don't have to get it fixed. because i'm just now able to enjoy it... sort of.

thanks.
Ken

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  • slcollom Aug 23, 2008

    The same occurs with my HK3480 as well. I cannot even make it through both sides of a vinyl without the receiver suddenly cutting out. I can switch between phono and FM and the sound temporarily returns but for only a few seconds. This also happens when I switch between phono and tape mon. I hope it is something that I can fix instead of having to send it back

  • Anonymous Oct 29, 2008

    I Have the same problem. Every thing is fine during a few minutes. Just after it suddenly cut off and there is nothing to do... When I change the source (CD --> Tape or something else) I also have the sound during approximatively 1sec. I don't understand. It seems that the automatic protection is doing its job too often...


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Your fuses are blown by possible crossing speaker wire - and + together. I did this and kept turning it on but I ended up frying the unit. Check your wires and make sure that they are seperated properly. If problem continues then unscrew the shell and replace 1 or all 3 fuses (depending on what was blown) with GMA 8 amp fuses. good luck.

Posted on Jan 03, 2009

  • rdera336
    rdera336 Jul 14, 2012

    I'm having a similar problem but I can't even find the fuses. Are they the traditional glass tubes or something different? Any help would be greatly appreciated. Thanks, Ray

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I did a system reset by unplugging the receiver from the wall for around an hour. I read this from Harmon Kardon maintenance manual. It worked perfectly for mine.

Posted on Jan 03, 2009

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