Question about Harman Kardon HK 3480 Receiver

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Amplifier/receiver switches off systematically after a few second of use

I have got a problem with my receiver Harman Kardon HK 3480 . When I switch on the receiver , it looks correct a few seconds ( blue light and display showing the radio frequency ) but a few seconds later , the word " protect " is displayed and the received is switched off . I can hear a "click" noise ( relay ? ) coming from the left rear side of the receiver .

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Sounds like a bad output channel is causing it to go into protect mode. Time to see a repair tech.

Posted on May 02, 2007

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Posted on Jan 02, 2017

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1 Answer

Not getting any sound out of speakers help please :(


You need to set the device on the aux mode. Connect the cable at aux. Sign at the back of the device

good luck

May 07, 2015 | Harmon Kardon Harman Kardon Harman/kardon...

1 Answer

Where to buy transistor for hk3480 part num 328 kca3114


Hello,

Are you sure that is the part number? The HK-3480 uses a KTC3114A and is quite easy to find. Q317 and Q318 in your receiver.

Make sure you see the numbers correctly.

Jan 16, 2015 | Harmon Kardon Harman Kardon Harman/kardon...

1 Answer

How to troubleshooting


prob with the audio amph on the motherboard

Dec 04, 2013 | Harmon Kardon Harman Kardon Harman/kardon...

1 Answer

Will not turn on. Message Protect


audi amplifier IC,s burned need to replace them

Jun 05, 2010 | Harman Kardon HK 3480 Receiver

1 Answer

Reciver goes into protect mode as soon as I turn it on.


Remove speaker wires and try again. If it still goes into protect mode, the problem is internal...shorted power transistors or some other fault. Check fuses also.

Apr 01, 2010 | Harman Kardon HK 3480 Receiver

2 Answers

Why does my harmon kardon reciever keep protecting when i turn it on? i checked the fuses.... nothing wrong...?!?


Check the speaker wires.
Make sure your ohm loads are stable especially if you are using more than one pair of speakers to any output.
Check the starting volume.

Nov 23, 2009 | Harman Kardon HK 3480 Receiver

1 Answer

I have a Harman Kardon HK-3375 stereo receiver. I


A power switch either works or does not work. It does not power on and then mysteriously power off like yours is doing.
You have some sort of power relay that is being powered off after a few seconds.

I would check out the power supply for your anomaly. And no, it is not a simple fix like you are capable of performing.

Apr 01, 2017 | Harman Kardon HK 3375 Receiver

1 Answer

No speaker sound with hk 3480.


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.

Nov 20, 2008 | Harman Kardon HK 3480 Receiver

2 Answers

HK 3480 sound suddenly cuts out


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.

May 23, 2008 | Harman Kardon HK 3480 Receiver

1 Answer

Haron Kardon 3375 Recevier Shut Down Problems


5 amp "slow blow" fuse where power cord connects to amplifier has probably blown. 9 screws holds the cover on, remove them and check fuse.

Dec 10, 2006 | Harman Kardon HK 3375 Receiver

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