Question about Sony STR-DE475 Receiver

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Protect Mode My receiver has gone into protect mode....just wondering how i can get it back to working order, have disconnected everything from it and even plugged it into a different power point but still comes up with "protect"

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  • jekswan Oct 09, 2008

    I have the same problem. The display on the receiver is flashing "Protect". Surround sound is no longer working. Running the audio directly off the tv now because of it. Wondering if it is worth having receiver repaired or just replacing.

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Protect mode with nothing connected indicates an internal problem. Most likely one or more output transistors are shorted. This is a common problem with these and can easily be repaired by a shop for around $35 in parts plus the local labor rate. The output transistors are MN1620 and MP2488 (if memory serves me correctly).

Dan

Posted on Mar 31, 2008

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1 Answer

My pioneer vsx815 is in protect mode i disconnected everything but the blue light continues to blink when i plug it in. What can I do to get it out of protect mode?


If you reboot the receiver with nothing connected to it except the power cable and it is still in Protection, there is an internal component that has gone bad.

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My Sony str de335 is in protection mode speakers are unhooked how do I get it out of protection mode?


if you disconnected everything and it still goes into protect, the most likely there is a damaged amp channel that will need to be repaired.

Feb 23, 2015 | Sony STR-DE335 Receiver

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It comes on then protection mode comes on and wont go off allso i disconnected everything and it still stays on the screen


disconnect everything in the off state. Power on. Still in Protect mode? Then it is an internal fault. Service shop repair.

Mar 25, 2010 | Sony STR-DB830 Receiver

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Shuts down in protect mode


disconnect all the speakers and turn it on. if it does not go into protect mode, then youve got a bad speaker or wire. good luck

Feb 10, 2010 | Sony STR-DE597 Receiver

1 Answer

My Sony receiver is flashing protect mode


Disconnect all speaker wires at the receiver. Then power the unit on, if it stays on, post a comment on this thread and I will help you troubleshoot further. If "Protect" remains on, you need to have your receiver serviced. Hope this helps.

Aug 23, 2009 | Audio & Video Receivers

1 Answer

TX-DS838 shows protect and then shuts down


yes , Im afraid you have a chip gone , If you open the unit up you'll see a alloy heatsink with 4 to 8 large chips screwed to it , These are the amp drivers , In between these chips you see a smaller one (that is the protect chip),You see when things get a little hot this chip is designed to break sooner that the more expensive main amp chips , In the past ive unsoldered these and still found the amp driver bust too ,dont worry though , maplins or even farnell(cpc) on the web will supply these for less than a tenner..If you wanna test my fix then just unsolder the littlest chip on the main heatsink and it should start to work again but with NO protection(unplug it first before taking it to bits)

Jun 06, 2009 | Onkyo TX-DS838 Receiver

1 Answer

Stuck in protect mode


Speakers shorted out, blew a fuse. Replace the unit or (cross your fingers and) open up the box and find the blown fuse.

Nov 23, 2007 | Sony STR-DE425 Receiver

1 Answer

Protector flashing


Protet mode is a special diagnostic mode that starts when a fault is detected.

When in protection mode the unit is prevented from starting by protection circuit, so to prevent further damage.

Check the speakers and speakers wiring, a contact in speaker wires, or faulty speakers can send the unit in protection.

Try unplugging power cable for one hour or so. then connect cable back and see if you get rid of protect state. Sometimes accumulation of electrostatic charges inside circuit capacitors can kick in protect mode. In that case unplugging the unit from main for some times can get rid of electrostatic charges, and reset circuits by draining power completely.
If that was the problem, you will not get Protect when plugging back power cable.

If you do all the above and still get Protect, then there is a real fault.

In that case the unit may be disassembled and tested to find the fault.

If that is the case I suggest contacting the manufacturer at the number listed on the owners manual, or asking a quote on repair to a local technician.

Oct 05, 2007 | Sony STR-GA7ES

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

1 Answer

My receiver is in protect mode.


The units in the protect mode because the Microprocessor detects a large current being drawn by the amp. section of the reciver. This is a solid state unit and there are no user replaceable parts inside this unit. Unless you know how to trouble shoot sloid state devices then you should seek a pro to assist you with this repair. GOOD LUCK

Jun 25, 2006 | Sony STR-DE597 Receiver

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