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PROTECTION MODE I HAVE A TX-SV515PRO--WE CAME BACK FROM VACATION AND OUR HOUSE SITTER TOLD US THAT THE UNIT WAS IN PROTECTION MODE-- IT WORKS AT LOW VOLUME, BUT AS SOON AS WE INCREASE THE VOLUME, IT GOES INTO PROTECTION MODE. WHAT IS THIS, AND IS THERE ANY WAY TO DELETE THIS AND GET IT BACK TO NORMAL ?

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  • Anonymous Mar 13, 2008

    I have the exact same problem that just happened today. I'm curious to know what your outcome was.

  • tonyvo03 Jul 13, 2008

    i have the same problem too and its starting to **** me off.

  • Anonymous Dec 20, 2008

    This could be the answer to my problem as well...no audio through the speakers, not even the test tone. I'll try it out. Did it work for you Terry?

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The unit may be experiencing an overload caused by a short circuit, internally or externally. Try disconnecting all the speakers, then turning up the volume. If nothing happens, connect one speaker at a time and turn up the volume to see if you get more sound. You may have a speaker that has shorted internally and this will help you discover the bad one. However, if when you have all the speakers disconnected, and the unit still goes into protection mode with the volume up, then there is a problem with the unit itself.

Hope this helps, and please rate my advice, good OR bad.

Good luck!

Posted on Feb 04, 2008

  • Rufus K Nyaga Jan 03, 2012

    Paul,

    Thanks for the Advice. I had a problem with my system and after doing what you explained... i realized is the Woofer that caused the system to got o protection mode. you mean the Woofer has a short? and what should i do about it. The system is already out of warranty. Is it a big issue to correct it?

  • Paul Teichmann May 23, 2014

    Thank you for the positive feedback, and I apologize for the late response. I will respond assuming you haven't done anything else yet. First, the first answers question is yet. It was driven too hard (too high a volume) and probably has melted the coil inside, rendering it unfixable. Second Q: Replacing the woofer isn't a big deal at all. The simpliest solution is using the speaker brand and model # to find a replacement, whether online or from a local dealer. If your speakers have a name but but no model #, let me know and we'll take the next step. If they have neither, I suggest that now would be a good time to replace both front speakers.

×

Technicklynut is absolutly right.

Posted on Jun 01, 2008

  • Paul Teichmann May 23, 2014

    Thanks for the affirmation.

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My hometheater onkyo ht-s 3500 problem increCVasing volume level 45 cut off amplifier


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Knowledge Article C337191 Error: The message PROTECT or UNPLUG shows in the display.
Follow this procedure to troubleshoot when a PROTECT or UNPLUG error is displayed.
IMPORTANT: The top of the receiver must have proper ventilation to keep from over heating.
  1. Reduce the volume level.
  2. NOTE: If the receiver is played at the maximum volume level it may enter the PROTECT mode. Maximum volume listening will cause the receiver to run hot and drain the output capacitors.
  3. If both the A and B speakers are being powered by the receiver at the same time, turn off the surround sound option.
  4. If protect occurs only when using a DVD player, the sampling frequency may be set too high.
  5. NOTE: Some receivers provide compatibility with the higher sampling frequencies through alternate connections. Consult the user manual for specific information.
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Created: Thu Sep 16 14:49 2004 | Last Modified: Wed Jan 11 09:02 2006
http://www.iq.sony.com/srvs/autoresponsev4.asp?id=337191

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Protect mode will kicking whenever a fault is detected.

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Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

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If this happens only when connecting the receiver, chech the receiver cable. If the cable is fine, receiver connector at the back of receiver is faulty.

Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

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Take every single cable out of the unit, now power on the unit.

If the power protection still shows then there is an internal fault, usually a short or a component defect.

If it powers on ok, switch off and insert 1 speaker at a time and power on the unit until the protection mode comes on again, the last speaker you have put in has overloaded it for some reason, also as you are trying each speaker use the volume and bass controls to see if there is an internal overload.

Thats as much as I can offer you until you narrow the fault down to the unit or one of the speakers.

Cheers

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