Question about Harman Kardon HK 3375 Receiver

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Haron Kardon 3375 Recevier Shut Down Problems

My receiver has recently been shutting down...starts up for a few seconds and then shuts down. I've checked to make sure none of my speaker wires are shorted out...everything else looks OK. My wife claims something smelled when it went out. Any ideas?

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Re: 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.

Posted on Dec 09, 2007

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I conected my sub wrong and the unit shut down , I reconected my sub and everything seems to work fine , should I send it in for servicing?

If i'm right, the system powers down as a safety precaution. It prevented itself that it will breakdown. It's your choice but I recon you can just enjoy and listen to your favourite music.

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I can see two possible problems.1: your receiver wants to take too much current and it shuts down the relais to the speakers, or,2: The hold contact of that relais cannot keep it's voltage and shuts off the speakers after a short time.
Check your end transistors for shorts and/or see what the voltage does at this relais. A faulty capacitor perhaps?

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If the display comes on for a few seconds (maybe 2-5?) and then shuts down it is likely a shorted output transistor(s) to start and possibly other bad components which would need to be replaced.

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If a fuse was blown, it likely would have no power. However if the power board has overheated, the capacitors may have swelled up and burnt out and will only allow it to power on for a few seconds, then shut down. The capacitors can look swelled up or burnt or have burn marks on the power circuit board. You can test them with a continuity meter. Each component has a printed number of it's voltage and ohm resistance so you can test them.

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Receiver keeps shutting off after 3 seconds. what

Be sure the face is secure, and there is no dirt in the connection on the face, and head unit.


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If you want to fix it:

It must be a contact problem arount the power switch, power cable, fuse or the condensator area.
Maybe you can se a black color on the board.
And checking the solderind points with a magnifyer can help too.

Thats all from that distence.

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