Question about Sony STR-DE435 Receiver

6 Answers

Protector flashing Protector continues to flash, even when all speakers are unplugged. Can you help me resolve? Methods for locating internal "short" or whatever the issue may be? Is there a way to reset the unit? Please advise.

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  • 14 more comments 
  • stock Nov 17, 2007

    Power on...within a few minutes Protecter flashes

  • David CRASH Nov 21, 2007

    When I turn my volume up the stupid protect flashes on the display and then the unit turns off. The receiver worked great for about a year with no problems. Now all of a sudden I am having problems and I have not changed any equipment or settings. Please Help.

  • 21blind21 Nov 21, 2007

    my protecter keeps flashing when the speakers work and its all good

  • Anonymous Dec 10, 2007

    unpluged power and speakers

  • jttucker Dec 23, 2007

    turn power on wait a few secs and protector flashes continously no sound and no controls

  • Grizzely Jan 01, 2008

    I pulled the whole system and have removed the tuner.

  • Anonymous Jan 08, 2008

    protector flash across screen,nothing works

  • digipro Mar 03, 2008

    Hi. I have the same problem with the PROTECT message on my TX-SV636 tuner. I found that I had 4ohm Bose speakers hooked up to where it says they should be 8ohm on the back of the receiver. They work fine for about a month, then one day PROTECT appeared... Obviously my fault but do I need a tech to fix it? Or can the problem be pinpointed because of my specific error?
    Thanks

  • EREHDER Mar 08, 2008

    I HAVE A SONY STRD665 RECIEVER THAT IS IN PROTECT MODE. DISCONECTED ALL SPEAKERS AND TURNED DOWN ALL VOLUME.

    CAN I RESET THIS



    EREHDER62@AOL.COM

  • heavydtone Apr 08, 2008

    I have the same problem,when I turn on the receiver after about 5 seconds the proctector light flashes. I also had 4 ohm speakers hooked up to my sony str-de835 for about 2 days and then I turned it on and it when into protect mode. Is there some kind of reset you can do to fix this problem?

  • mayel Apr 29, 2008

    I have the problem when I turn on the proteccion is flashing and doen't work.



    the model is str-d665

  • mayel Apr 29, 2008

    sony str-d665 I have the problem proteccion may be somebody can help me please.

  • hchaparro Sep 06, 2008

    i have a technics SA-AX6 for many years, and yesterday it started to say overload on the display.i unpluged all the speakers but that did not work.please advise thanks hector

  • Anonymous Oct 22, 2008

    I have a onkyo amp tx-ds747 n it keeps on saying protector i have pulled the av cables out n the speekes n its still saying it help me please ?????

  • Anonymous Mar 10, 2009

    can use bose speakrs

  • michael steven rogers Jul 09, 2013

    ghhh

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SUCCESS. I have a SONY STR D990 where the PROTECTOR light would stay on no matter what I did. As a last resort I pulled the cover and tried the recommendation by GUEST 6/8/2008. I unplugged and replugged all the white connectors that I could easily reach and checked to see if the light came back on when I repowered the unit thereby checking each by a process of elimination. For some reason after unplugging and plugging back in the main white 2 wire 120V power connector the PROTECTOR light stayed OFF and the unit started operating again. I've left it running for a few days and the light has never come back on again. I also added electrical grease to each of the connectors after and before plugging back in just to ensure that each was making a good connection. Many thanks for the suggestion, even if I don't know why it worked. I was about to dump the unit as I only use it in my garage.

Posted on Nov 18, 2012

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I had the same problem with my 2 year old Sony STR-DB780, all of a sudden it showed PROTECT nomatter how many times I turned it on and off.
Checking the speaker cabling for any shortcuts and eventually disconnecting all cables did not solve the problem.
So I opened the case and disconnected the pcb where the speaker outputconnectors are soldered to. This small board also had the speaker on/off relais (light blue). I disconnected the main connector (white) from the main pcb and turned the amplifier on again: problem of 'protect; was solved ....

So I checked for short cuts in the pcb, removed the dust and made sure the wires (red black black white) were not touching eachother; the isolation can be damaged by the internal heat and the wires are routed so that they touch internal components.

After reconnecting the main connector the receiver is working well again. No cost and hopefully useful to others!

Posted on Jun 06, 2008

  • rdemby
    rdemby Nov 18, 2012

    I have a SONY STR D990 where the PROTECTOR light would stay on no matter what I did. As a last resort I pulled the cover and tried the recommendation by GUEST 6/8/2008. I unplugged and replugged all the white connectors that I couyld easily reach and checked to see if the light came back on when I repowered the unit thereby checking each by a process of elimination. For some reason after unplugging and plugging back in the main white 2 wire 120V power connector the PROTECTOR light stayed OFF and the unit started operating again. I've left it running for a few days and the light has never come back on again. I also added electrical grease to each of the connectors after and before plugging back in just to ensure that each was making a good connection. Many thanks for the suggestion, even if I don't know why it worked. I was about to dump the unit as I only use it in my garage.

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This happens to me too... I have a DTR 5.4... Worked well for a couple of years... Now it is shutting off when I have the volume up too high... Although, sometime it just does it at random.... Very annoying...

Posted on Jan 08, 2008

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If unit goes into protect mode and stays, it is not a good sign. Either you have a shorted speaker(s) or wires leading to them.
If you disconnect all speakers and you still get protect light, your problem is most likely shorted output transistors /(ICs) and/or drivers. Problem arises form over driving outputs or not enough ventilation when unit gets hot. Just like your car uses radiator to keep in operating range, receiver has finned heat sink that MUST have good air flow to prevent overheating and burnout. This is especially true with high power (100watt +) 5.1 - 7.1 surround per channel amplifiers. Another rule of thumb, never operate receiver/amps in closed rack with unit on top. It will pick up heat from equipment below it

Posted on Apr 12, 2008

This worked Great. I got this item from work for free thought it was broke. I was about to brake it with a hammer than i thought lets go on the internet and so i did an now it works great. Thanks Alot

Posted on Apr 15, 2007

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If you know how to trouble shoot solid stste electronics then sure we can assist you in repairing the unit. If you have a meter then your gonna first have to locate the audio output Ic'S get a service manual and with the reciver on, measure the voltage on the output pin of the IC. If there's any dc voltage at all on that pin disconnect it and check the other side output PIN Also find the b+ pin and disconnect that too. On each output device. Plug in the unit and it should come out of protection. If it dosen't then theres another short in the drivers and they only way to find these is to unplug unit and staticly check each transistor on high ohms to find a leakage. If you Understand what I just said check these items and get back to me as i would like to see the schematic to assist you in what to check next. If you dont then its time for the repair shop as we cant teach you how to do these repairs overnight as this is a timely learning processe and need schooling to learn the theroy and the experience for the practibility of repairing electronics. Good luck

Posted on May 12, 2006

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