Question about Harman Kardon AVR 235 Receiver

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Protect -- Shuts off

While watching any action movie or music videos at a certain level (I don't think it too loud) the system will flash protect and shut off. The movie isn't shaking the walls or anything & is at a medium volume setting. How to I reset or correct this problem?

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Re: Protect -- Shuts off

I have the same receiver with the same problem. I shipped it to a certified HK repair center and they shipped ti back "No Problem Found" and billed be $100.

I recommend avoiding HK products. The receiver has been nothing but problems for me, and the company does little if anything to support their products.

Posted on Oct 21, 2012

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Re: Protect -- Shuts off

It could be the speakers are at too low of an impeadance or a bad speaker. Check the bad of the receiver and see if it states the proper type of speakers to use. Most say "8 ohms to 16 ohms "A or "B" and "16 ohms or more "A + B". if your speakers are 4 ohm speakers that is your problem.

Let me know what you find out about the speakers. It says on the back of the speakers where the wires plug in what ohm rating they have.


Posted on Jul 01, 2008

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Receiver turns off at volume of about 45 to 50 when watching blu ray movies

It is picking up DISTORTION and is going in to shutdown mode.... (protecting your system) play it at 44 or less... not because it's BLEURAY that it's perfect, the level and quality varies from one recording to another... think of a cuttoff just like a car engine when someone tries to go over the dangerous level of RPM's... the engine cutt's off...

Aug 06, 2011 | Onkyo TX-SR606 Receiver

1 Answer

Protect message

If you are using AV cables from your TV for movies and a different hookup for the X-Box would explain that the relay for the sound inside your unit may have blown from being overloaded or faulty. Should be an easy fix at a trusted electronic service place.I am not sure if your system has a manual reset button underneath or on back, but you could look for a tiny hole with reset on it or a red button. It may save you a trip to the doc.

Nov 11, 2007 | Marantz SR4500 Receiver

1 Answer

Vsx-52o when watching dts or any good movie the low sound talking you cannot hear well unless the sound level up to 55 or more ,but when the action or music starts it blows your head off its that loud...

That could be one or both of two things at work here.

One is a failing or mis-configured center channel. Crack the manual and make sure the speakers are all workign at the desired level with test tones.

The other is dynamic range (ratio of loud to quiet sounds). In a silent listening environment with the volume set at a comfortable level for the loudest sounds (like during the beginning of some movies you get that THX sound logo or some other audible but loud musical intro, THAT's what you adjust for) the relatively quieter moments would still be audible. Add normal background level sounds of a real-life environment and you can lose the quieter sounds and dialog.

In a perfect world and in accordance with the engineer's decisions, the widest dynamic range is the correct way to enjoy a given recording or movie.

Experiment with the DRC (page 34) for each soundtrack to see if compression might work better.

Jul 18, 2011 | Pioneer VSX520 Receiver

1 Answer

So what do i do if when i turn my onkyo tx-sv454 receiver on it says protect and then shuts off? How do i fix that or get around it? please help me....

I don't think you can fix it, unless you're skilled with electronics. Possibility that something has occurred internally with a circuit board etc so the system shuts down in order to protect itself from catching on fire etc. Get it services. Might not be too bad of an issue, but certainly not a bypass.

Mar 02, 2011 | Onkyo TX-SV454 Receiver

1 Answer

When you are watching a movie and turn on system it goes into protection mode and shuts off. Also when you are listening to music when the volume reaches a certain level(not very loud) it goes into...

Loose speaker wire somewhere or heat.

Generally speaking, an amp protects itself from heat, shorts and overloads by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections as a root cause for intermittent shutdown.

Feb 26, 2011 | Harman Kardon Audio & Video Receivers

1 Answer

My kenwood vr615 reciever had the volume turned up, unit shut down and now when it gets to a certain volume that is much lower than normal it will turn off and the stand-by light will flash, I have to turn...

hello ,i strongly suspect the units protect circuit is sensing a speaker problem.Listen to each speaker to see if all the drivers(woofer,midrange,tweeter) are working and if so are any of them sounding distorted.When an amp is damaged it wont play at all,sounds like a bad speaker to me.

Jan 09, 2011 | Kenwood VR615 Receiver

1 Answer

How do i disable the protect mode?

Ensure your speaker ratings (4 ohm, 8 ohm, etc) are sufficient with the output of your unit. The protect mode sense a currently level on the output amps that is nearing the failure rating. Just make sure your have properly rated speakers.

May 03, 2009 | Sony STR-DE475 Receiver

1 Answer

Protect Flashing Sometimes

Dust the cabinet out with one of those cans of "dust off" compressed gas and make sure you have PLENTY of ventilation around the amp.

Feb 24, 2008 | Sony STR-DE345 Receiver

1 Answer

"Protect" feature increasingly activated.

You may have an output transistor gone bad and it is trying to run on one good transistor since they commonly are used in pairs (one positive and one negative). Time for a trip to the shop. Good luck.

Jan 23, 2007 | Sony STR-DE585 Receiver

1 Answer

Shutting off during a loud part of a movie

Its eather a defect with the reciver top end shut down /over bias system , Or the speakers could be partially shorted, such as instead of being 8 ohms, the speakers could have a few shorted windings from a loud music event?? I would take the speakers in to be checked under load. NOT just checked for resistance.. A regular shop may not know how to do this BUT tell them you need to put the speakers under a load and then measure the resistance . GOOD LUCK

Jun 25, 2006 | Yamaha RX-V550 Receiver

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