Question about Sony STR-DE715 Receiver

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Protect is on

The outputs seem to be ok. After a few seconds the unit goes to protect on.

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Hi...
Is it LOUD when you first turn it on?
Are the speakers firmly connected at BOTH ends?
If that's all OK then one or both of the output modules in the power amp have failed.
Parts are available

Posted on Jan 22, 2009

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1 Answer

I turn on my noise and it says video 1 for a few seconds then keeps saying protect


The receiver has an output load problem, turn the unit off, remove the speakers and wires, now! turn it back on and reduce the volume right down, if the word protect stays off you have a short in the wires or one of the speakers. However! if the word protect comes back on "with the wires and speakers dis-connected" there is a short in one or more of the audio output ic's in the receiver, this will require a technician to troubleshoot the extent of damage and cost involved.

Jan 29, 2011 | Sony STR-DE845 Receiver

1 Answer

Look at inside at capacitor and fuse but they seem ok. again once i turn it on, it would automatically shuts off after a second.


When a system shuts down after a few seconds it is the self protect circuit shutting down power to the outputs to prevent (further) damage. It may be caused by frayed speaker wires, bad speaker voice coils, or blown output transistors. First, turn off power and remove all speaker wires from the receiver. Turn it back on and see if the problem remains. If it works OK, inspect each speaker wire at both ends for loose strands and correct these. Then, hook up your speakers one at a time until the problem reappears. That speaker or its' wiring is your problem. For safety's sake. turn the receiver off before connecting each speaker. An accidental short of the output terminals can be disastrous (and expensive).

Apr 06, 2010 | Yamaha RX-V661 Receiver

1 Answer

It dont turn on. theres red light flashing. is like in protection or something, it last a few seconds and then turn off.thanks for your cooperation


If you have done a reset by holding down speaker a and b buttons while plugging in. Hold buttons for a few seconds then release.If goes back to protect mode then you have a shorted output channel. Most repair shops will charge from 150-200 for repair, there is a lot of parts you have to replace on this model.

Apr 01, 2010 | Denon AVR-1905 Receiver

2 Answers

Getting out of protect mode I have a Denon 787 receiver. It was working fine for 8 months. All of sudden, my reciever goes into protect mode after playing for about 30 min. Right after it goes into protect...


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,,

Dec 18, 2009 | Denon AVR-787

1 Answer

When iturn on my Sony STR-DE325 it goes into protect mode


Try disconnecting all of your speakers, and then turn on you unit. If you have a defective speaker, or a short in your wires, your unit will go into protect mode. If your unit seems ok with the speakers disconnected, then turn unit off, hook up one of the speaker leads and try it. This way you can isolate the problem.......

Good Luck,

Eric

Jul 09, 2009 | Sony STR-DE325 Receiver

1 Answer

Protect is on after a few seconds.


If the output are good, Check for a bad/loose ground. Check the solder near the input jacks, and tighten any and all ground screws that hold the circuit boards to the chassis. It could also be a bad transistor in the protection circuit.

Jan 22, 2009 | Sony STR-DE715 Receiver

3 Answers

Denon AVR-1508 Receiver problems - cuts off and goes into protect mode


Usually when the unit runs for a while before shutting down there are two possibilities:

1) There is a small amount of DC current present that effectively heats up the speaker coils enough to cause a temporary short circuit that kicks in the protect circuit.
2) The output transistors or bias transistors are sensitive to heat and breaking down again causing the protect circuit to kick in.

A few experiments to try:

1) Does the time to shutdown change depending upon the volume level?
2) Is there any background noise coming from the speakers? Listen to a blank tape for example. Is there a hum or any other noise that you would not normally expect?
3) If you have a DC voltmeter, check for any voltage between the speaker lines.

Update this and we'll try to narrow this down.

Dan

Aug 18, 2008 | Audio & Video Receivers

1 Answer

Sony STR DB-930 Receiver jumping into protector mode


I went through the amp/receiver and used small star washers on all the grounding screws I could find including the one securing the transformer, cleaned dust off all circuit boards, checked output transistors and fuses, all OK.

Re Assembled unit and it worked OK.

I will buy a fan and fan it to avoid sourcing heatsinks for the previusly suggested IC's.

Thanks for the technical help, sure solved my problem.

Regards

Darryl.

Mar 07, 2008 | Sony STR-DB930 Receiver

2 Answers

Stuck on standby


Unit is in protect mode there are a few problems that can trigger protect mode the most common is blown channel (shorted outputs). Sometimes one of the 15v regulators may go bad causing imbalance of supplys triggering protect mode. Also sometimes a bad solder connection could cause unit to go into protect also. I work for Denon authorzied repair center in Michigan if your nearby and Shipping to Michigan is economical let me know kstahl65@att.net

Feb 13, 2008 | Denon AVR-1804 Receiver

1 Answer

Unit goes into protect mode


Not unless you know how to troubleshoot solid state electronics. If you disconnected the speakers and the unit still goes into the protect mode, most likely you have a short in one of the power output stages. Good Luck

Jun 03, 2007 | Marantz SR-4200 Receiver

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