Question about Sony STR-DE310

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Sony AM/FM Receiver problem

I have a Sony FM/AM Receiver (Model # STR-DE310, S#8137032) that I purchased in 1998. It has been workingfine until a few weeks ago, when it shut down anddisplayed a flashing “PROTECT” message. The manual advises to “turn the receiver off,eliminate the short-circuit problem, and turn on thepower again.” It does not offer what specificshort-circuit problems may exist. I have checked allthe wires leading out and into other components andspeakers, but I find no obvious culprit – loose orcrossing wires etc. There have been absolutely no changes or modificationsor movements at all with my entire stereo system sinceI first installed it many years ago. This juststarting occurring right out of the blue. It is also interesting to note, that except for oneother time when it did this twice, the flashing“PROTECT” message never again is displayed after Iturn the power back on again. It will continue to workjust fine for several hours of use after turning onthe unit again. I would think that if indeed theretruly were a short in a circuit somewhere, it wouldshut down immediately with each attempt to turn thepower back on. Could there be a faulty internal breaker in thereceiver itself that would set this off? It has onlydone this within the first 5-10 minutes of use. AfterI turn the power off and turn it back on, it seems towork just fine for up to several hours or more, so itwould not seem to me to be a heat buildup problem either. Can you offer any suggestions?

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  • Anonymous Jan 08, 2008



    Sony Receiver STR-DE-310



    PROTECT indication occurs when volume is increased

  • greenthumbct Feb 24, 2008

    I have qn older sony fm-am stereo receiver, model STR-D715. Last night my daughter smelled something burning and saw the protector flashing on te screen. She quickly turned off the stereo and unplugged the cord. This morning I looked through the operating manuel and it talks about a short circuit. Where do I start looking for a short circuit?

  • Becs1 Mar 09, 2008

    The PROTECT message light just came on one day and it hasn't worked since.  Every time we turn it on, it flashes TV/DBS a couple times then back to PROTECT.  I tried unplugging the unit, but that didn't help.  ** wires are disconnected either.  Is there anything else I can try?  Thanks! Rebecca

  • dad99 May 14, 2008

    We had an electrical storm. No damage to anything else that i could tell but all of a sudden my STR-d3675 Sony amp started flashing "Protect" and now won't work! Help!

  • weesel72 Jul 01, 2008

    flashing protect?????

  • yo100 Jul 10, 2008

    Exactly the same problem as with the original post: I bought it around 1998, and it has work fine until recently, when it started to go into "protect" mode.  However, powering it off and on again used to solve the problem.  Not any more: today it just shows the input that I select for a couple of seconds, and then it goes into protect, even if I just turned it on.

  • ihatestuff Feb 17, 2009

    Me too, I have the STR-DE310 and It wont come out of protect mode! Mine first started when I had a fancy keyboard hooked up to it and itwas most definitely from a volume over load, but I unplugged it and itworked again. However, I accidentally gave it too much volume again,so it went back into protect mode and this time unplugging it will notwork. I checked the fuses, and they are all fine. It did startworking, oddly enough, when I took it into best buy, but strangely itwould only work when held vertically with the face straight up ordown...? Once leveled it would go back into protect mode. They had noIdea what to do with it besides charge me to send it to their techs,but I opted not to do so. I brought it home and now it will not work atall again even vertical. It seems like it should be an easy fix? Somebody please help...

  • ihatestuff May 11, 2010

    hlshwar, what do you mean "hooked up a ground wire as per the manual"?

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I had a similar problem with my unit. I found no evidence of a short circuit and after removing the cover no evidence of burns or overheating . I turned the unit on and off repeatedly and eventuaully it started. As I was moving the unit back on its shelf I brushed my ring hand across the top of the unit and the "protect" warning started to flash. It occurred to me there might be a static electricity issue. I hooked up a ground wire as per the manual. Problem solved----at least for the past few weeks. The system has work flawlessly every time I turn it on.

Posted on Oct 29, 2008

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Did you ever find a solution for this problem? because I am having the same issue with my STR-SE391. if so let me know what to do.
thanks gilmorespub@yahoo.com

Posted on Feb 01, 2008

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How do you hook up a groundwire to this receiver?

Posted on Jan 21, 2010

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Same problem here!! Protector!! Now the blooding sound doesn't work at all. What is the problem and can it be fixed?? What is the cost???? sgchicago2000@yahoo.com

Posted on Feb 24, 2008

Yes, I am aware that increasing volume could cause such a problem. However, I listen exclusively to classical/choral music and have never been someone who "cranks it up". It has never occurred when I had the volume up any higher than I normally do (usually at about 3-4 out of total 12 settings on the volume control.

To gilmorespub: Lately, my problem has resolved by itself, or at least I have not had the problem occur in the last several uses. I did "jiggle" the wires again on the speaker manifold, and although I never saw any obvious problem with wires touching etc. perhaps it was enough to alleviate the problem. Or it just resolved itself. I still am suspecting an internal breaker fault that is either wearing out or is unstable.

Good luck!

dougkary

Posted on Feb 01, 2008

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