Question about Sony STR-DE345 Receiver

10 Answers

Reciever not working

One time i turn on so loud the fuse blownoff.i replace the fuse but every time i turn it on the display said (protect)thats all it wont work.

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  • Anonymous Nov 01, 2007

    sony model STR-DA1ES will not power on at all

  • Anonymous Nov 13, 2007

    3rd time receiver turned itself off while being played loud and getting way hot - even when outside of shelf (all speaker connects were being used). But unlike last two times when receiver came back after cool-down with no problem - this time I get nothing on the digital screen - no dtails at all - just a blank. Power is showing on - and blown fuses.

  • Alex Nov 18, 2007

    Where are these fuses? My KLH R7000 does not have any exturnal fuses
    and the interior the only fuse is for the main power supply... am i
    missing something?

  • David CRASH Nov 21, 2007

    My receiver volume goes silent and the display says protect. It worked great for about a year and now lately if I turn the volume up it does it again. The manual says to check the speaker connections, I did, they are all ok. Please HELP!

  • Anonymous Dec 08, 2007

    replaced the fuse inside and all it reads is protect

  • Anonymous Dec 09, 2007

    My reciever won't work at all and the display say's protection, I'm sure it's a

    fuse, but I can't find it.

  • nickscrap Dec 20, 2007

    I was listening to my receiver on medium loudness when i saw a puff of gray smoke come out of the top.It turned off and said protect.I opened it up and checked the fuses and they were good.So,i looked on the amp coil and there was a black spot around a black chip with white lettering that said (MP1620/ 50 P).if you could help me out and give me an idea whether its worth trying to fix it would be great.You can reach me at (s.percle@yahoo.com).thanks and good day!

  • Anonymous Dec 21, 2007

    same exact problem

  • Anonymous Dec 22, 2007

    After connecting all 5 speakers, I heard music from one speaker but the rest did not deliver any sound in CD mode. So I switched to the dvd mode...then the receiver displayed "Protect" and the standby started blinking continuously. How can I rest it?

  • absolute12 Jan 15, 2008

    I have had this sr6001 for 6 months; Since it was new it was shutting off while saying protect. I was not playing loud. I would have to unplug unit and then plug back. It would then be fine for a few minutes, then again shut down. I took it to Marantz they upgraded the firmware. Now same problem but does not come back on when shuts down. They told me to reset the unit by pressing 3 buttons. This works but from time to time the unit for no reason shuts down while saying protect. Speaker hook up is fine no crossed wires. Marantz tested unit again and says nothing wrong. I like the unit but would not recommend it.

  • wayne1071 Feb 23, 2008

    no power

  • Anonymous Feb 24, 2008

    turn power on and it only stay on for about 2 seconds then it say power off.

  • Anonymous Apr 23, 2008

    My reciver blow the 8A fuses.

  • Anonymous Apr 23, 2008

    My reciver teac model AG-D8900 blow the 8A fuses.

  • pedronicolas May 03, 2008

    cam you helpme? i need service manual tks.

  • Anonymous May 13, 2008

    the DTM 5.3 display reads protect.  what gives and how do i fix it?



  • tann1963 May 25, 2008

    we have taken ours to Steve's TV and they fixed it. But if we turn the power off, the same thing happens again....so now we when we had it fixed, we just do not turn the power off on the receiver....never and then it is ok....but if you turn it off.....the protect comes back on again. It is getting to costly to fix and thinking of buying a newer receiver to replace this one.

    unless someone has a solution...of course the manual does not tell you about this in the trouble shooting section



    rc

  • wboi978 Jun 01, 2008

    i turnd my sony str-de325 up loud and naw all it does is clicks wen i turn it on

  • Anonymous Jul 12, 2008

    protection flashes

  • kacaks23 Jul 23, 2008

    I have the same prob.Thats when I listen dvd.

  • Anonymous Jul 29, 2008

    quand jpese sur power la fuse saute a chaque fois ke faire

  • Anonymous Aug 26, 2008

    No speakers connected it still says protect- tried different outlets. It seems normal at power up for about 4 - 8 sec. and then flashes protect. I have held the power button down until "initial", protect comes on 4 secs later

  • Mitcheal French May 11, 2010

    sorry but I'm a little illiterate when it comes to technical terms... So what am I looking for? where is the protection circuit? how do I know if something is wrong with it? same with the output transister and the caps? Thanks !! : )

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You many have a fraid wire or if you playing the unit to loud and overload the amp this may cause it to go to protect. Also is the the receiver properly vented.  If it get to warm the receiver will also go into the protect mode.  hope this helps

Posted on Oct 24, 2007

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I had this same problem with STR DE310. Problem was due to loose speaker wires causing a short. Re-attached wires, both at the tuner and at the speakers, problem solved.

Posted on Feb 12, 2008

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The problem has nothing to do with the output, the problem sits in the small board with the yellow connectors, there is a dataflow from the frontand the masteboard and te data is interupted at a moment and tha gives "F70 " I repaird alredy some of them by replacing Q1701 and Q 1702 by BD649, (5V stabilizer ) they can have more power, also replace fuse F5 =1At internal resistance my be too large .
Mostly is it a fall down of the 5 volt that gives the F 70
The best solution is resoldering the print but this almost impossible because their may be some intreruptions between the solder and componentside
The board "REP3107G-T " is no longer available;.. Daniël from Belgium

Posted on Jan 09, 2008

Shouldnt there be a built in circuit breaker that turns the system off when you are overloading it? This is my experience with them - i usually blast the sucker but it just shuts off and works fine on reboot! - Put a fan on it so it doesnt get too hot!

Posted on Dec 16, 2007

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  • Master
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Where are these fuses? My KLH R7000 does not have any exturnal fuses and the interior the only fuse is for the main power supply... am i missing something?

Posted on Nov 18, 2007

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If you check the owners manual there is a menu for setting the power on volume, I had the same problem and fixed it with the manual.

Posted on Nov 05, 2007

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Or keep it simple and find which speaker wire or speaker itself is shorted out. usually your positive wire it touching a negative either at the stereo or speaker connection. unplug 1 speaker at a time but do not play sound very loud. or just disconnect all and add one at a time until error comes back.

Posted on Jul 27, 2007

Check board grounding points.

Posted on Jul 09, 2007

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Check to see if you put the correct fuse in the receiver, and if it is the correct one, you will need to check the protection circuit because with it being turned up so loud the amp was probably damaged. in most cases with protection circuits you will probably find your problem with an output transister. than check for blown caps.

Posted on Apr 01, 2006

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1 Answer

My reciever is saying on the display screen protect. what does this mean?


That means that the receivers' overload protection circuitry has been engaged. Depending on the number that is also displayed after the alarm message, there are several causes for this. Overheating, running inefficient speakers such as below approximately 85dB/1W/M rating or too loud a volume with demanding source material and last but not least a loose connection of any kind on the rear panel or on any of the devices connected to it. Especially the speaker cable.

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I replaced an inline power fuse inside of my Onkyo reciever, power returned and now I have no output to main speakers and the unit flashes back and fourth between regular display and protect. ?????


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most of the receivers come with a cooling fan inside see if its working they usually work when you turn the volume up,, if its working that means you are playing it to loud if you lower the volume a little it will play just fine..( if the fan inside is not working thats the reason it goes into protect mode and it means you must have it repaired,, it goes into protect mode to prevent furter damage to the unit or the speakers,,

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