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Sony home theatre system receiver displaying PROTECT.

When switch on it is displaying 'protect' i disconnect all the speakers and still displaying protect.if i keep switching it on and off it sometimes work for a short period and sometimes a long period.thanks for help.raj from guyana

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Output stage fault probably a capacitor leaky

Posted on Dec 10, 2008

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Sony HT-SS1000 theatre system


It is possible that the amplifier had encountered a fault with a higher current drain which had triggered it to a protection fault condition. The fault can be with your output drivers. Please check for short on the outputs fitted for both the channels. Use a meter after disconnecting to check for short in the drivers. Disconnect the positive and negative voltages to the output and see if the protect changes. Even a fault in the preamp stages that drives in high current into the output can shut the Amplifier. Sometimes this can be a noise which can be a HUM or HISS before the protect works. Faulty capacitors in these circuits also can cause similar issues and needs close observation.You need to confirm and replace the specific stages or outputs. If not there can be issues in the mother board. Maybe the protect circuit by itself is shutting off due to a faulty bias or there is a leak in any voltage/current sensing circuit. Also disconnect the speakers and test, if the amplifier comes out of the protect mode then check for short on the speakers.

Nov 22, 2011 | Audio Players & Recorders

1 Answer

Samsung AH64-04467E Home Theatre powers on but then goes to Protect and shuts down


Start by disconnecting all of the speaker wires usually direct short causes protect to shut down.

Are the speakers the right ohms

Sep 28, 2011 | Audio Players & Recorders

1 Answer

The home theatre system LG HT904TA went in to protection mode. Mean that the receiver/dvd panel shown 'protection ' on the display panel. I have try to switch off /on but the 'protection...


If you've disconnected the speakers and the fault is still showing then the fault is internal with the Amplifier and it's shutting down to protect itself from further damage.

Your only solution is to remove the cover and have a look at repairing it yourself or take it to a repair shop.

Jun 28, 2011 | LG Audio Players & Recorders

1 Answer

SONY HOME THEATRE SYSTEM Model STR K 670 serial # 8877041 The system turned on and blinks protect. I cleanes all the speaker connections and still the same. Please advise Daghild



http://esupport.sony.com/US/perl/model-home.pl?mdl=STRK670P&LOC=3



http://www.kb.sony.com/selfservice/microsites/search.do?cmd=displayKC&externalId=C215444&fes=true&mdl=STRK670P


From the link...


PROTECT, PROTECTOR or the letter P is flashing in the display of the Audio/Video (A/V) receiver. Solution
sp.gif sp.gif If PROTECT , PROTECTOR or a P is flashing in the display of the A/V receiver, there may be an incorrect connection or an improper setting. Try following these steps to resolve this issue:
IMPORTANT: If model-specific information is needed to complete any of these steps, refer to the instructions supplied with the product. Manuals are available online through the Manuals/Specs/Warranty link on this page.
NOTE: Because each of these steps represents a possible solution to this issue, check the A/V receiver status after completing each step.

  1. Check the speakers and speaker wires for proper connections.
  2. Reduce the volume level. IMPORTANT: If the A/V receiver is used at maximum volume level, it may enter the PROTECT mode. Maximum volume listening will cause the A/V receiver to run very hot and may drain the output capacitors.
  3. If applicable to your model, disable the surround sound option if both the A and B speakers are being used simultaneously.
  4. Ensure the top of the A/V receiver has proper ventilation to keep it from overheating.
  5. If the message only occurs when using a DVD player, the sampling frequency may be set too high. IMPORTANT: Some A/V receivers provide compatibility with the higher sampling frequencies through alternate connections. Consult the owners manual for specific information.
  6. Unplug the AC power cord for approximately 1 to 2 hours to reset the output transformers.
If the issue is still unresolved, service may be required.


My $.02...


Overloads can be from excessive periods of high output 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 hands-on tech.

Jan 28, 2011 | Sony Audio Players & Recorders

1 Answer

Receiver goes in to "PROTECT" mode


Try disconnecting your speakers. Then see if the unit displays protect. If it does, then the finals in your Amplifier have gone bad and will need service. If the unit comes on and there is no error, you most likely have a bad speaker.

I hope this information allows you to resolve this issue.
If you need further assistance please comment to this post and I will try to help you further.

Thanks for using FixYa
asnowman

Aug 18, 2010 | Sony HT-DDW790 System

1 Answer

"PROTECT" appears on my DENON DHT-500SD


Sounds like a speaker wire is shorting against either another speaker wire or something metallic. Check your speaker wires to make sure they're not shorting (touching). If that doesn't work, I'd take it to a repair facility. Good luck!

Feb 16, 2010 | Denon DHT500SD System

1 Answer

Sony str-de545 protect mode?


Disconnect all speaker wires at the receiver and turn the unit back on. If it stays on, your receiver is ok and you need to reconnect speakers one by one and test until you find the one causing the "protection" once you find this, disconnect the wire at the speaker and test again. make sure the + and - wires do not touch! If the receiver stays on, use a multimeter to test the speaker for a short with resistance check. If your not sure how to do this, any home audio shop will test it for free and while you wait. If speaker wires are disconnected and it still shuts down, it needs to be serviced. Hope this helps

Nov 18, 2009 | Audio Players & Recorders

1 Answer

Hello, I have a problem with dvd home theatre system... there is a display saying... push protector power...and i dont know how to fix it...


remove all speakers and turn it on if it still displays protect (and it probably will) the damage is done. could need a diode or an output ic. not a diy job.

Nov 08, 2009 | Sony HT-6900DP 6.1 Channel DVD Home...

2 Answers

PROTECT DISPLAYED ON RECEIVER


This generally means you've got a short somewhere, and the received is trying to protect itself.

My suggestion is to disconnect all of your speakers at both ends, and reconnect them.

Most times this happens because a speaker wire is lose, and the positive and negative connections are touching each other, causing it to short out.

Mar 24, 2009 | Sony STR-DE485 Receiver

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