Question about Sony STR-DE545 Receiver

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Protect keeps coming on

Hello, every time i turn on the amp the protect flashes. I cannot find the controllers though. Could you help me out please

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  • mrcbond Apr 30, 2008

    This doesn't help as i have done it all ready

  • Anonymous Oct 27, 2008

    I checked my speaker wires and none were touching still proterction.


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I used to get this when my speaker wires were touching each other and my 3yr old cranks the volume to Max. Check your Speaker connections you might want to take it all out and redo. Hope this helps.

Posted on Apr 25, 2008

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Power problem

If the protect function works but is causing you problems, cancelling the protection function should help, and it will be possible to enter the self-diagnostic function mode. This should disable all functions of the protection mode, excluding the 'excess electrical current detection' feature.

While pressing the "Tone Control" and "Info" keys, try pressing the power key to turn on the power. Keep pressing those 2 keys for 3 seconds longer.

this should activate the Self Diagnostic function, with your Protection Mode disabled.

in this mode the 'sleep' section on the tv's fluorescent display flashes to indicate that the mode is properly activated.

just be very aware, this function is normally there as a safety feature and i cant guarantee that disabling it altogether won't cause other problems down the road. best of luck!

Jun 06, 2014 | Yamaha Audio Players & Recorders

1 Answer

The push power protect always flashes on my sony any time is been switch on,the model number is MHC-VX55

This is a common question on this site. Amps of all types have protection circuits to keep them from doing a self meltdown. Testing follows this logic. 1. Remove all speaker wires. 2. Keep the volume down - all the way. 3. Turn the unit on. 4. If it does not trip off, then there is a problem either in a speaker or the wiring. a. Reconnect one at a time until/unless it trips off b. That will tell you where to look further.
If it does trip off, then there is an internal circuit issue in the amp and probably requires professional help to fix.

Nov 15, 2010 | Audio Players & Recorders

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My reciever keeps flashing the word protect what can be done

Protect is the amp's way of saying it is protecting itself from trying to deliver more current than it can. First step is to disconnect the speakers. Have no input signal present (volume all the way down) so it is not trying to put out power. If the protect indicator still comes on, the amp has an internal short or problem and needs professional help. If the indicator does not come on, then you have an issue in your wiring or the speakers. Reconnect one at a time or get new cables and try again. Good luck.

Oct 22, 2010 | Teac AG-790 Receiver

1 Answer

PROTECT is flashing on our Sony Digital Audio/Video Control Center

PROTECT means the receiver is automatically powering down to protect it's amplifiers. Top reasons are overheating, which can be caused by poor ventilation, covering vent holes, excessive volumes for long periods of time, or it's actually just that hot in the room, which, with the current weather, I've encountered in clients homes before. The other option, and just as common if not more so, is that the speaker wire outputs are shorted out and are causing the amp to turn off. The easiest way to test this is unplug all of the speakers and turn it back on. If it still says protect, then it's either too hot or there is a physical problem with the protection circuit and needs to be serviced (this would be a good time to kick yourself for buying a sony receiver). If it DOES power on, plug in the speakers one by one, and if the amp goes into protect mode as soon as you plug in a speaker, it's an issue with that one. Check for short circuits in the line (kinks, frayed ends, staples going clear through the wire, etc). If the wire looks good, try putting a different speaker at the end. If a different speaker works, then the speaker is blown, which gives 0 continuity, and the receiver is correctly protecting itself from the high impedance load. Change the speaker.

Sep 08, 2010 | Audio Players & Recorders

1 Answer

System Protect mode after a Flash fire.

The flash probably was a small resistor burning. While not particualrly common, it does happen. The output transistors are shorted and need to be replaced. If the same channel is bad as the first time, there is a possability that the unit was not completely repaired. Some shops only change the shorted transistor within the transistor pair. This is poor practice and usually leads to another failure of the same channel Check your previous invoice for the parts replaced. The entire complimentary pair of output transistors should have been replaced. If only 1 iof the 2 were replaced, you may have an argument for a warranty repair.

Please keep us posted on your progress.


Dec 10, 2009 | Onkyo TX-DS838 Receiver

1 Answer

Keeps flashing PROTECT when switched on

Check all of your connections very carefully. If all seems well, disconnect one wire at a time, then power on after each wire is disconnected. Alternate between power off (remove a wire) then power on. If the PROTECT comes back on, reconnect the one wire and then power off. Disconnect the next wire, power on, and see if the PROTECT comes back on. If so, reconnect that wire and continue until all of your wires are checked. If at some point after disconnecting a wire and powering back up, the PROTECT does not appear, that wire you just disconnected is the culprit and needs to be replaced. Even a single strand of speaker wire crossing to another opposite polarity (speaker wire) or input can cause a fault making the receiver "PROTECT" itself. Although it may be tedious, it is effective to trouble shoot this way for the first step. If you want disconnect all wires from the receiver and then power on to see if it does it independently of any other connections. I hope this helps and good luck. Please vote 568462d.jpg below if this is helpful.

Oct 30, 2009 | Sony STR-DE345 Receiver

1 Answer

Flashing protect

the protector comes on to keep the amp from further damaging itself or the speakers. The buzz you heard was probably 60HZ line buzz from the main DC supply conducting full current through one of your speakers through a damaged amplifier transistor. Your stereo will need professional repair. The protect circuit basically opens the speaker relay (and sometimes shuts down the unit) to prevent this DC voltage and current from getting to your speakers until the problem is corrected.

Jun 17, 2009 | Onkyo TX-SV727 Receiver

1 Answer

Audio protect keeps turning off my receiver (sony STR-DE597)

That is the common symptom of the defected STK-IC in power amp.section that busted already or just a loose connection.First try to resolder the pins of STK-IC and also all component parts joint in power amplifier section if its works! if not that is the time you replace it, so it works normal again.

Hope it may helps you...

Jun 08, 2009 | Sony STR-DE597 Receiver

1 Answer


Your amps' output section is shorted and is sending it's supply voltage straight to the speakers. The protect circuit is there to protect your speakers from being burnt. You need to go to an authorized Sony service center. Good Luck!


Oct 11, 2008 | Sony Audio Players & Recorders

1 Answer

Amp keeps switching off

There is a problem with one or both of the audio amp circuits. The amp is going into a protect mode as to protect and save your speakers. Sorry but there is no simple fix. this will need to go to the shop to be diagnoised. Good Luck

Apr 29, 2007 | Onkyo TX-SV373 Receiver

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