Question about Sony STR-DG520 Receiver

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SONY AV RECEIVER IS FLASHING PROTECT AND THE MANUAL SAYS IT IS A SHORT CIRCUIT PROBLEM BUT DOES NOT EXPLAIN HOW TO FIX

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6ya6ya
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Posted on Jan 02, 2017

smarthome2
  • 1114 Answers

SOURCE: Sony STR-D665 receiver display flashes "PROTECT"

The most common problem found on FixYa for Audio Video Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Jun 07, 2010

  • 2 Answers

SOURCE: Shuts off everytime i turn it up pass 4.

Speaker wire contact with each other is the problem. Check the back of ALL SIX speakers including sub-woofer. You should find wires contacting each other. Fix that and your problem will be solved.

Barry Scholles
Strasburg, OH

Posted on Dec 30, 2008

  • 92 Answers

SOURCE: goes into protect mode..

you probly have speaker wires arching. unplug them and replug thm in making sure no bare wire is showing

Posted on May 20, 2009

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Dec 26, 2015 | Pioneer Audio Players & Recorders

1 Answer

I have a Sony AV model str-dh520. The protection circuit keeps coming on then shuts down. I tried unplugging all the speakers from the unit but still protection circuit is still activated and shuts down....


Hello there friend,
Go here at Sony for some ideas to try when PROTECT shows on your machine. https://us.en.kb.sony.com/app/answers/detail/a_id/39211/c/65,66/p/41901,43145,92877,44396/

It seems the main amplifier chip / circuit may be overheated or short circuited and is now permanently faulty and need replacing Generally means desoldering the chip and replacing.

Sep 08, 2014 | Audio Players & Recorders

1 Answer

I have a Sony STR-DH810 7.1 channel receiver. Everytime I turned it on, it shows the channel for a while then turn to PROTECTOR the turn off by itself. How to fix this problem, thank you...


You must be having a power Amp output problem. There must be a short circuit in one of the amplifiers and that is triggering the protection mode to prevent speaker damage. You will need professional help for this since the circuit is complicated and so is the construction. Getting access to the under side of the circuit board for removal and replacement of the components is very difficult on all modern AV receivers.

Sep 26, 2011 | Sony STR-DH810 Receiver

1 Answer

My Sony STR-DE185 is displaying "PROTECT". The manual says it is from a short circuit. Are there any known common problems with this unit related to short circuiting? Mike


If the speaker wires shorted together, it will trigger the protection circuit. If the output transistors/IC shorted out in the power amplifier section, it will also go into protection mode also.
Try disconnecting all the speaker wires to see if it will come on normal.
to have it fixed by the shop may not be worth it.

Basic LCD monitor and TV troubleshooting guide:
http://www.fixya.com/support/r5093881-lcd_flat_panel_tv_troubleshooting_guide
http://www.fixya.com/support/r6150077-basic_lcd_monitors_troubleshooting
http://www.fixya.com/support/r7406380-tv_training_manuals
Failed TV and Monitors pictures: http://s807.photobucket.com/albums/yy352/budm

Jun 14, 2011 | Sony STR-DE185 Receiver

1 Answer

I have a Av receiver tx-sr506,and it has these proble,the standby led is flashing and when turn on it goes back to the flashing standby mode,can i have any idea to fix it or any tech who can fix it.


The flashing indication is telling you to seek professional help. You have have a short circuit in your output stage and your Onkyo is going into protection mode to prevent further damage. The least you can do is to switch off speaker A and B and try switching on the Receiver. If the then the system turns on you have an external shorting in the speaker wire or speaker itself.

Apr 11, 2011 | Audio Players & Recorders

1 Answer

My Sony STR-de310 is flashing "Protect", and none of the other buttons work. What does this mean>


there is a short circuit somewhere in the amp. turn it off and find/fix it before turning it back on again.

http://pdf.crse.com/manuals/3859380111.pdf


Jan 09, 2010 | Sony STR-DE310

1 Answer

Protect flashes. I reset as manual instructed. I


Don't forget to disconnect your sources also(dvd,satellite,vcr,cd player,etc) they could have a short in any of them causing receiver to go into protect,If still flashing "protect" your Sony could have an internal short of it's own, or caused by an external short previously mentioned. Good luck !

Nov 27, 2009 | Sony STR-DE695 Receiver

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