Question about Sony STR-DE935

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Protected My STR-DE935 will occasionally stop producing sound and will then display "Protected" on the screen. Any thoughts?

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  • Anonymous Dec 02, 2007

    I have a Sony STR-DE-935 and when using the 5.1 Channel output I have to listen to movies at a relatively low volume, otherwise the unit goes into the "Protector" mode. Turning the unit off, then on, only solves the problem for a short while until the movie gets loud again. I had the same problem with a 925, however the store I purchased it replaced the unit with a "NEW" 935. Now it is happening again. I have checked the speaker wires and nothing is crossed or touching another circuit. This has been happening for several years, however just recently I completed a theater room and now I am pretty fed up with the problem. If this doesn't get fixed...Bye, bye Sony products.

  • Anonymous Jan 06, 2008

    I have the same problem with my Sonny HT_DDW740 reciver after powering

    up Protected is displayed.



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Oct 23, 2008 I have the same "Protector" problem. There is mention of this on Sony's website:

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. The Sony® eService Web site at can assist you in obtaining service from a Sony Service Center or locating a Sony Authorized Servicer.
I followed their "advice" to my unit's been in the shop for a couple weeks.
I called for status today 10/24/08 and was told that there is a "backorder on a part". My repair
shop cannot estimate when the "part" will be available.

SO...I suspect a component failure and since Sony does not have the part, the questions are:
1. Is there a delay in Sony getting the needed part from the manufacturer (if it's not Sony)
2. Are there so many occurrences of this problem that Sony can't keep the the "fix part" in stock!!

Time will tell!

Posted on Oct 24, 2008


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