Question about Sony STR-DE545 Receiver

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Protector Upon power-on, Protector flickers on the display. I checked inside, and found no blown fuse. I disconnected all of the cables including speaker wires, but no change.

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Re: Protector

If you took all the speakers off the reciver then it still goes into protect, the reciver detects DC on the output lines. That means there is a short in the output stage of the amp. It could be an output device, or a diffencal Transistor. If you can trouble shoot solid state electronics then you should be able to find the faulty, but if not your experienced at electronic repair, am afraid it may cost more then the reciveris worth. Good Luck PS please dont forget to rate this thread

Posted on Oct 23, 2006

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Turning it on the onlything it says is Welcome Protector and does nothing else

Is the message "Protector" or "Protected"? Several models will say Protected if there is a voltage/power issue with either the unit or the speakers attached.

This can be triggered by a short in a wire to the speakers or to the unit itself or a blown fuse inside the unit. Unplug the receiver from the incoming power from both the receiver and the outlet, if possible. (This applies if it is a free-standing unit; units in cars are different.) Then unplug the speaker connections. Reconnect the AC power and attempt to turn on. Does the error persist? If it has been resolved, plug in the speakers one by one. If you get the message as you plug in the speakers, check the wires for a short. Check if your speakers are drawing more power than the receiver is capable of handling. (This only applies if the speakers are directly connected to the receiver.)

If the message occurs before you plug in the speakers, check for a problem with the ground as well as for a short in the rest of the power connections on the unit. If there is no obvious damage, then if the unit is still under warranty, consult the manufacturer for a warranty repair. Otherwise you'll need to open the unit and check the circuitry. (Replacing the fuse may work. However it will not resolve the problem if there is another problem that is causing the fuse to blow.)

I hope this helps. Please add a comment with the make/model and specifics of the receiver for more information.

Cindy Wells

Dec 17, 2011 | Audio & Video Receivers

1 Answer

The receiver turns off 2 seconds after turning power light blinks

have you got all the wires wired in correctly.have you extended your speaker cables and not insulated them(wires could be touching each other).maybe a blown fuse inside.although i think if it were a fuse,it probably wouldnt light up at experience with my system is that if i wire up something wrong,the power button light which is a green light,will change to red to let me know something is not right.(its warning me before i blow something up)!!yours might be doing the same thing only flickering to let you know somethings wrong.If none of this helps then you should send it in for repair.Dont be afraid to open your system and look for a glass fuse(s) about 20mm long.if you find one and its blown,then you are lucky.a blown fuse is better than a blown system

Oct 16, 2010 | Denon AVR-689 Receiver

3 Answers

Dear support team... i am fix in a problem with my reveiver.. kindly help.. i just got my onkyo TX-NR3007 today in india from mew york,, now i am facing a problem.. i connected it with power outlet and...

Well seems the unit is going into protect mode, if you open the unit and look near where the cord enters the unit you will see some fuses, you may of blown one of them. The real problem you might have is a defective power supply, by connecting 240 volts means that while the unit was working all the voltages were out of tolerence or to high in the reciever. There should hear two clicks, one from the power on relay and the second one is the Speaker output relay. Disconnect all speakers from the unit and then try turning on again, if it goes into protect again and the fuses the you may of blown one of the Amplifiers outputs..GOOD LUCK!

Jul 17, 2010 | Onkyo Audio & Video Receivers

1 Answer

The word protector is displayed

If protect is coming up on the display, it means the system is detecting a short somewhere on one of the speakers and so is turning the amp off to avoid damage.
Check all the connections at the back of the amp to ensure they are not shorting, and at the back of each speaker, if nothing is found there, check each wire for damage (like squashed or rodent damage).

Mar 06, 2010 | Sony STR-DE705 Receiver

1 Answer

Sony STR DE-445 unit powers up but no sound

Check the fuse, Sony is known for its random problems with sound. The one I have you must tap it on the side. Its a flicker switch inside.

Feb 13, 2010 | Sony STR-DE445 Receiver

1 Answer

I keep getting a Protector reding on my screen and it will not let me do anything. What do I do to fix this?

Try disconnecting everything (speakers cables, signal cables, all other units) except the power cord, then turn the unit on, if the protector message persists, then the fault is in the reciever.

If this is the case, you should check the speaker and signal connectors for any damage, shorts or loose solder contacts, also check the unit for any shorted or broken wires, loose wire connections, bad solder contacts on connector pins, bad solder contacts on ANY other components (give some extra attention to the components that tend to warm up while they operate, like main power amp transistors / ICs, voltage regulators, power resistors, diodes, also coils, capacitors, etc). Any loose solder connections should be resoldered.

If there's no message when you've disconnected the outside equipment, you have either a bad speaker, a bad speaker cable, a bad signal interconnection cable, or a fault in any of the units that were connected to the reciever. You can find which one is the cause by turning the reciever off, then connecting one cable or unit, turning the reciever on again, see if there's a message, if there's none, turn it off again, connect the next unit / cable and so on, until you get the protector message. The cable or unit that will make the message appear is most probably the cause for the trouble (there might be loose solder connections on other units' cable connectors or other components). When you plug and unplug the cables many times, with time this will loosen the solder connection on the pins inside the unit, so these need to be resoldered.

Hope you can find out what it is.


3rq8 (Triarcuate)

Aug 08, 2009 | Sony STR-GA8ES Receiver

1 Answer

Error code - protector

Try disconnecting all the speakers from the back and turn the unit back on. If the "protector" display goes away, turn the unit back off and reconnect one speaker. Turn it back on and check for "protector". Repeat.

If you find that one of the speakers causes "protector" to appear, you either have a bad speaker cable or bad speaker. Try swapping each of those out to see what happens.

Apr 20, 2009 | Sony STR-DA90ESG

1 Answer

Stuck protector mode

find out why the fuse blew in the first place.the protector is just PROTECTING the main circuits of the receiver.the receiver turns on just to confirm the power circuit is OK.
have it checked by an electronic engineer.

Apr 16, 2008 | Sony STR-DE597 Receiver

1 Answer

RVD 6090R Stopped working after a very brief power outage.

Hi cleitner . It has most likely blown a mains power fuse. You will need to FIRST DISCONNECT FROM THE POWER. Then remove the lid and check internal fuses. Best done with an ohms meter to be sure that you don't miss any. Some fuses can look ok but be faulty. Replace any blown fuses with one of exactly the same type. If you are not sure what type of fuse you need, feel free to get back to me here. Good Luck, thanks for using FixYa


Mar 03, 2008 | Sherwood RVD-6090R

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

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