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Posts: 2
Registered: ‎04-18-2017
Message 1 of 3 (804 Views)

Sony STR-DA333ES no rear output

[ Edited ]

I've had my trusty Sony STR-DA333ES A/V Receiver for years.  

Except for a brief period where it flashed "Protect" on occasion, it has worked perfectly.  

I recently moved it, and disconnected the rear speakers.  

When I reconnected them and ran a test tone, there was no rear sound.  

I switched the wires, plugging the rears into the front outputs, and the speakers work fine, but no test tone appears to come out of the rear outputs.

It is quite possible that the rear speakers were not working before I started moving the unit.

My questions are: 

1) Is there some setting I may have triggered to turn off the rear speakers?  I've tried the "Normal Surround" setting which says they should be working, but no sound.

2) Is there a fuse I can replace that may have blown on just the rear speakers?

3) Any other ideas on why the rears may have stopped working?

Posts: 1,766
Registered: ‎11-04-2016
Message 2 of 3 (780 Views)

Re: Sony STR-DA333ES no rear output

Hi Jimbo435,


Welcome to the SONY Community!


If the words PROTECTOR and PUSH POWER appear in alternating sequence on the display of your home audio device, or if the word PROTECT or PROTECTOR appears, there may be an external speaker issue or connection issue that is triggering the protection circuit. Try following these steps to resolve this issue:

NOTE: Because each of these steps represents a possible solution to this issue, check the A/V receiver status after completing each step.

  1. If there has been an electrical surge or power outage, then the internal surge protection inside the home audio device may have been triggered to protect the device from the surge. This is normal. To reset the internal surge protection circuit unplug the AC power cord from the wall for at least 30 minutes.
  2. Ensure the top of the home audio device has proper ventilation to keep it from overheating. Running the home audio device in a poorly ventilated cabinet can trigger the protection circuit.
  3. Reduce the volume level. If the impedance of any of the speakers is below the rated impedance range indicated on the rear of the home audio device next to the speaker connections, the home audio device may enter the PROTECT mode. Raising the volume with a low impedance speaker will trigger the protection circuit.


    • Replace low impedance (outside of specifications) speakers with the correct impedance to prevent this from occurring.
    • If you continue to use the low impedance (outside of specifications) speakers and you ran the Auto Calibration, check your SPEAKER SETUP and individual speaker LEVEL to reduce any speaker LEVEL with a positive gain to 0.0dB or less.
  4. To isolate the problem, do the following:
    1. Turn off the home audio device, and remove all speaker wires from the back. Then turn the device back on and check if the issue is resolved. If it is still having the same issue, turn off the device again leave it off for at least 30 minutes before turning it on again.
    2. Inspect the speaker cords. If a cord is frayed or in contact with another terminal, an error will occur. Fix the connection to prevent a short circuit.
    3. Make sure the speaker impedance is within the recommended range. If the impedance is not correct, the speakers will not work properly and may be damaged. If the speakers are within the recommended impedance range, check the connections. If the speakers being used are within the suitable impedance range and they are still not working, there may be a malfunction or some other flaw within the speakers. Test by using a different set of speakers if available.



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Best regards,



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Posts: 2
Registered: ‎04-18-2017
Message 3 of 3 (778 Views)

Re: Sony STR-DA333ES no rear output

I resolved the Protector problem a while ago.  I think it was ventilation.  At least I did not see it after rearranging the components to give the receiver more air.


This new issue is just a lack of rear output.  I recently found a repair manual, and it looks like the rear amp is on a separate board, so I am thinking of opening it up and making sure it is properly seated. (although I can't imagine what could have unseated it)

Also, the whole thing could use a de-dusting.

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