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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 .

Posted by PERRIN JEAN-LOUIS on

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Mike Duncan

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

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

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