Question about Onkyo TX-SV454 Receiver

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When i turned on speakers both a and b the protect message came on--receiver is now totally disabled. help.

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This means that you have a problem with the speaker outputs.
-Try turning the unit off and unplugging it.
-Disconnect all of your speakers.
-Plug it back in and turn it on.
If it works, check you speakers and wiring for shorts.

If it still shows protect then you probably have a blow output amplifier and it will need repair.

Posted on Mar 15, 2011

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Posted on Jan 02, 2017

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SONY STR-DE445 UNLOCK CODE


Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.

  1. Check the speaker wires and speakers for proper connections.
  2. Reduce the volume level. IMPORTANT: If the receiver is played back at maximum volume level it may enter the protect mode. Maximum volume listening will cause the receiver to run very hot and may drain the output capacitors.
  3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
  4. Ensure the top of the 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 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 about 1 to 2 hours to reset the output transformers.
If the issue is still unresolved, service may be required.

Feb 11, 2012 | Audio Players & Recorders

1 Answer

When I turn on my Home Theater Sony Model hcd-hdx576wf this message appears, "protector, push power". what I can do?


Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
1. Check the speaker wires and speakers for proper connections.
2. Reduce the volume level. IMPORTANT: If the receiver is played back at maximum volume level it may enter the protect mode. Maximum volume listening will cause the receiver to run very hot and may drain the output capacitors.
3. Disable the surround sound option if both the A and B speakers are being used simultaneously.
4. Ensure the top of the 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 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 about 1 to 2 hours to reset the output transformers.

Dec 17, 2010 | Sony Televison & Video

1 Answer

I get a message Protect. All other controls are


Usually the protect is a safe mode to indicate that your set is unsafe. Starrt by checking the speakers, speaker wires for shorting. detach the speaker lines and power on the set for confrimation. check in power/auxially circuits in the set. it is possible that your mechanism drive / audio output drive Ic's could have shorted. Most of these cirrcuits have an error detection of higher current to cut off power and issue a protect warning. so discoonect the IC power to confirm. Hope this helps. Good day

Jul 12, 2010 | Kenwood KDC-MP435U CD Player

1 Answer

When the receiver start, after 10 sec, he goes in


THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE RECEIVER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION, THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEES AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 15, 2010 | Sony STR-DE875 Receiver

1 Answer

On power on it immediately powers back off.


THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION (POWERS OFF), THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEES AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 14, 2010 | Yamaha HTR-5140 Receiver

1 Answer

Does not output to the right speakers. Cuts on and off. Connections are fine. Speakers are fine.


THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION, THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEES AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. ONE SCENARIO HERE, IS THAT YOUR RIGHT SPEAKER IS SHORTED, THEREBY MAKING THE RECEIVER GO N AND OUT OF PROTECTION AND THE CONDITION OF THE LEFT SPEAKER IS UNKNOWN. THE OTHER POSSIBILITY IS THAT THE RIGHT SPEAKER HAS FINISHED BURNING UP AND IS OPEN, LIKE IT IS NOT EVEN CONNECTED AND THE LEFT SPEAKER IS IN THE PROCESS OF BLOWING AND IS THE ONE PUTTING IT IN AND OUT OF PROTECTION. AT ANY RATE, YOU REALLY NEED TO VERIFY THAT THE SPEAKERS VOICE-COILS ARE OK. I KNOW YOU SAID THEY WERE FINE, BUT YOU NEED TO REALLY CHECK THEM CLOSELY. YOU CAN USE AN OHM-METER TO CHECK ONE SPEAKER AGAINST THE OTHER FOR COMPARISON. WHILE NOT TOTALLY ACCURATE, IT WILL BE CLOSE ENOUGH TO DETERMINE IF THE VOICE-COILS ARE DAMAGED, SHORTED OR OPEN. AN 8 OHM SPEAKER WILL SOMETIMES READ A LITTLE LOWER THAN 8 OHMS, USUALLY AROUND 7 OR SO, BUT NOT LESS THAN 6. ALSO, DO CHECK THE SPEAKER WIRES THEMSELVES FOR BEING SHORTED OR PINCHED SOMEWHERE. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 14, 2010 | Yamaha RX-V795 Receiver

1 Answer

I get a protected message in my reciver str dh 500 reciver


THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION, THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEE AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 14, 2010 | Sony STR-DE475 Receiver

1 Answer

HI there, my receiver display "PROTECT" flashing! why?


THE GOAL HEAR IS TO DETERMINE IF THE INSTALLATION IS CAUSING YOUR PROTECTION FAULT OR IS IT THE RECEIVER ITSELF HAVING INTERNAL DAMAGE. REMOVE THE RCA INPUTS AND DISCONNECT THE SPEAKERS, THEN POWER THE AMPLIFIER UP WITH THIS NO INPUT, NO SPEAKER LOAD CONDITION. IF IT STILL GOES INTO PROTECTION, THEN THE RECEIVER WILL NEED TO BE SERVICED, AS YOU HAVE TOTALLY SIMULATED A BENCHED CONDITION THAT IS TOTALLY INDEPENDENT OF YOUR INSTALLATION. MOST TIMES, THE RECEIVE WILL GO INTO PROTECTION WHEN IT SEES AN EXCESSIVE LOAD WHEN TURNING UP THE VOLUME, WHICH IS USUALLY CAUSED BY TOO MANY SPEAKERS OR DAMAGED SPEAKERS, BUT IF NO SPEAKERS CONNECTED, THEN IT IS USUALLY BECAUSE THE RECEIVER SEE AN EXCESSIVE LOAD DUE TO ITS OUTPUT SECTION BEING DAMAGED. IN ANY CASE, ONCE REPAIRED, YOU MUST CHECK YOUR SPEAKERS FOR BURNED VOICE-COILS, WHICH WILL IMPOSE AN EXCESSIVE LOAD TO THE AMPLIFIER AND CAN CAUSE IT TO FAIL AGAIN. LET ME KNOW IF YOU NEED FURTHER ASSISTANCE.....V

Jan 14, 2010 | Sony STR-DE598 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

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