Question about Denon DRA-685 Receiver

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Protection error When I power up the unit it goes right into PROTECTION and nothing works. Is this an expensive fix?

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Re: Protection error

Your loudspeakers tweeters have shortcut *try them separetly)


Posted on Oct 16, 2007

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How do i eliminate amp protection. Unit goes no further. Tried to unplug the unit & plugged back in but problem persists. Please HELP!!!!!

This is a very ambiguous post. When you say that you are having this problem, what are you doing? Please post all the steps that lead to this error. There is no way to disable the amplifier protection circuit. If it senses a short (which could be a bad speaker) then it will be activated.

Dec 12, 2014 | NAD T748 Home theater receiver with...

1 Answer

Protection mode on HK Festival 60

The power surge may have killed the power supply on the unit
If you have home insurance , see if your policy covers it
If not, it would be too costly to service ( Over $100)

Dec 21, 2013 | Harman Kardon Audio & Video Receivers

1 Answer

To fix cpu on protection mode

I am highly skeptical that the CPU is the problem; protection mode is designed for protection of the amplifiers.

Use an artists brush to remove any dust and grime off the voltage rails and heat sinks. Reinstall the CPU and the chassis cover. Turn your attention to the rear connector panel; check for any broken or loose speaker terminals. If your speaker wires are still connected look for any stray wire strands and pull them off or bend them away from the connector panel. Check the connection for tightness, or simply disconnect any corroded wiring that you may not be using a banana or spade connector with and clip and redress it. Perform the same inspecting and maintaining procedures on all of your speaker channels.

When placing the receiver it must also have adequate air flow around it. Anything you can imagine that would allow the unit to retain heat increases the chance of it getting it into protect mode for thermal protection. Out in open air is best.
When the receiver is properly positioned and all connections are secure, power it up; it will likely still be in protect mode. If so, press and hold the power button down until the unit "clicks" inside the chassis; this takes approximately 15 seconds. Protection circuit is reset and you can now operate the receiver.

Feb 21, 2012 | Sony STR-DE597 Receiver

1 Answer

Sir my amp comes on and shut off

One of the amplifiers many protection circuits has been tripped. Which one it is may be tought to discern. Is there any message on the display? Could be a power supply proection circuit or possibly an output overload protection circuit. Have you disconnected the speakers and all other source inputs and outputs to verify if the unit still goes into protection?

Jan 28, 2010 | Yamaha RX-V663 Receiver

1 Answer

My yamaha reciever has a power problem in that when i switch it on, it only goes on for a few seconds and thereafter goes off.

As long as you're sure the power cord is firmly plugged in, it sounds like the protection circuitry of the unit has likely been activated. This happens when there is a short circuit in one of the connections. Check your speaker wiring connections and make sure all of them are firmly and carefully grounded (i.e. the copper of the wire touches nothing but the proper terminal, and that the wires do not touch each other). Check the connections on the speakers as well. If protection circuitry is the result of a shock or power surge (lightning, strong static, etc.), you can reset it. Turn it to standby mode, unplug it, wait for 30 seconds, then plug it back in.

Jan 20, 2010 | Yamaha HTR-5630 Receiver

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Protection error in denon avr-3000


Do you know what caused the protection shut down in the first place? Did you short your speaker wires even briefly?

You could try to Unplug the Unit for Few Minutes, say 30 minutes and then turn it back ON.Usually that would fix the issue.

If you are going into protect mode with no speaker attached,chances are that your output Ic is in need of replacement .This is the most likely cause of a protection error that you are experiencing.I am having a bit of difficulty in locating specific part numbers but feel confident that replacing outputs will remedy your concern.For further info and parts or authorized service locations in your area I suggest to contact mfg at .Click on support or call(201)762-6500.I believe that they have a flat rate service and will give you an estimate.

Still, on the remote possibility that it is just a glitch caused by momentary power interruption or fluctuation, try to re-initialize the microprocessor, a hard reset (not unless this is what you were referring to as rebooted). The reset should force the AVR-3300 to revert back to factory defaults removing glitches, errors in settings & configurations, memory & presets as well as user preferences.

* turn OFF the unit using the POWER button;
* press and hold both SPEAKER A and SPEAKER B;
* without releasing the 2 buttons, press the POWER button;
* release the 2 buttons only when the display starts to flash;
* in the event of no display flashing, repeat the process.

Should the above be not corrective, then it would be a hardware fault and not just a glitch.

Let me know, if needed further assistance.

Hoe i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Jan 13, 2010 | Denon AVR-3300 Receiver

1 Answer

How do i fix tis problem

First, disconnect all your speakers from the back of the unit. Then turn it back on, if it does not go into protection, turn it off and examine your speaker wires, look for frays that could touch the other binding post (most common problem). Then re connect speakers one by one; testing after each connection. If you get them all re connected and it still plays, you've solved the problem. If you get to a particular speaker and it cuts off, check the wire, then check the speaker. If theres nothing plainly visible, swap the speaker for one that is working and try again. If it still shorts, try a new wire. Beyond that, if it's still shorting, theres a problem internally with the receiver and it need to go to service. If you have all speakers disconnected and it still goes into protection, there is nothing you can do but get it serviced. There are no internal protection "fuses" Hope this helps

Jun 30, 2009 | Sony STR-DE597 Receiver

1 Answer

TX-DS838 shows protect and then shuts down

yes , Im afraid you have a chip gone , If you open the unit up you'll see a alloy heatsink with 4 to 8 large chips screwed to it , These are the amp drivers , In between these chips you see a smaller one (that is the protect chip),You see when things get a little hot this chip is designed to break sooner that the more expensive main amp chips , In the past ive unsoldered these and still found the amp driver bust too ,dont worry though , maplins or even farnell(cpc) on the web will supply these for less than a tenner..If you wanna test my fix then just unsolder the littlest chip on the main heatsink and it should start to work again but with NO protection(unplug it first before taking it to bits)

Jun 06, 2009 | Onkyo TX-DS838 Receiver

1 Answer

Reciever power

It is going into protection mode. If you feel comfortable with directions look for the service manual and get the codes that are causing the protection error then you can find out how to fix it.

Nov 08, 2008 | Yamaha HTR-5730 Receiver

1 Answer

Protection mode after about 3 seconds

The protection is most likely being triggered by an internal fault. Typically the power amp section. The receiver will need professional service.

Sep 18, 2007 | Denon AVR-681 Receiver

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