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After a short while watching TV, I get a poping sound and my receiver goes into protection mode

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Hi,

An indication of "Protection Mode" is usually indicative of a systems error. The popping sound on the otherhand is made by a hardware failure, normally a capacitor or a transistor or IC cracking up. These are of course generalized response.

Should you need more specific information, pls post back brand and model of your unit.

Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information.

Good luck and kind regards.

Thank you for using FIXYA.

Posted on Feb 13, 2008

  • Louie  Role
    Louie Role Feb 13, 2008

    Nich, sorry for doubling up. Guess you posted while I was still composing. Cheers.

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1 Answer

Protect mode


The most common cause of this is that one of the speaker voice coils is shorted or the wiring to one of the speakers is shorted. Disconnect the speakers one at a time and see if the amp goes out of protect, if no change you have a shorted output circuit in the main amp section.

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The receiver will be on for a while 5mins.or so, then it will make this loud sound as it goes into protector mode...what is this and how do I fix this. I have it connected to the TV, DVD Player, CD, VHS...


you have speaker wires that are shorting out. unhook all the wires and ohm them out. Find out which one is shorting. I've had this problem before. It's fine until you turn it up, Then the receiver turns off and goes into protect mode. It's just a short in the wiring,.

Dec 08, 2010 | Sony STR-DE835 Receiver

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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.

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1 Answer

When swicth on, it goes out after writing protect, can i do anything?


It goes into protect mode when it senses something wrong. First check the speaker wires for shorts or diconnect them as a test. Turn it on, if still in protect mode, the problem is internal and needs to be looked at by a tech/repair shop.

Mar 09, 2010 | Sony STR-DE497 Receiver

1 Answer

Is in protect mode


I don't have and I'm not familiar with this particular receiver model, but common sense tells me that your receiver is trying to alert you to the fact that you may have shorted speaker wires, and it has gone into protect mode, to prevent itself from blowing up.
Please check your wires at the back, or best yet, if your receiver has a test mode on the remote control, use it. It tests your speaker connections for shorts, for wrong polarity, etc. If this receiver has surround sound, and all speakers are connected, it goes round and round creating some white noise from all speakers as it goes, until you press the Test button again.
Should one or more be connected improperly, or the wires be shorted, it will display a message telling you so.
Good luck!

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2 Answers

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Unit is in protect mode there are a few problems that can trigger protect mode the most common is blown channel (shorted outputs). Sometimes one of the 15v regulators may go bad causing imbalance of supplys triggering protect mode. Also sometimes a bad solder connection could cause unit to go into protect also. I work for Denon authorzied repair center in Michigan if your nearby and Shipping to Michigan is economical let me know kstahl65@att.net

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1 Answer

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Yep. The wiring to your speakers or the speakers themselves have shorted out. You have a blown fuse. You'll need to either replace the unit or attempt to replace the fuse yourself.

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