Question about Onkyo TX-SR505 Receiver

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What then? Thanks for your help, What else could be causing the receiver to go into protect mode? I have checked all my wires and connections. They seem OK. If the speakers I'm trying to run are ok, what could be causing it? The house was prewired, is it possible one of the wires in the walls was damaged (ie a nail through it)? Would that do it? How could I test this? I don't want to send the receiver back if it's a problem with my wiring, ya know?

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If you have an ohmmeter, you can verify the house wiring. Disconnect all the speakers from the amplifier. Disconnect the speaker wires from the speakers. Make sure none of the ends touch.

Connect the ohmmeter across each set of speaker wires. You should read an open circuit across each set of speaker wires. Basically if the meter gives you any reading, there is a fault somewhere on the line.

You could do the same test with the speaker wires connected to the speakers (but still not connected to the amplifier). You should see a reading greater than 4 ohms (and most likely less than 8 ohms) on each set of speaker wires. If you see a reading of 0 or 1 ohm on one set of wires, consider this suspect.

You mentioned earlier that you had 3 rear speakers each of 8 ohms... are they connected to one set of speaker wires at the amp? This would be an equivalent impedance of 2.7 ohms, and with loud volume, might be overheating a set of amp chips causing it to go into protect mode.

Let me know what you find.

Posted on Mar 25, 2008

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Harmon Kardon Receiver "Protect" Mode issue


If your receiver enters protect mode with no speakers connected, it is an indication that you will have to start troubleshooting inside.This will involve visual checking and checking with a multimeter to isolate the problem. A further issue is finding out why your JBL woofer keeps blowing fuses. It could be shorted.

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My teac ag-790a 'protect' error message on display. When I brought it to the audio shop for repair it worked fine; at home again the same problem? What is the problem? Tx.


Hello
Check the putput wirings to speakers. If any of them has short circuit, the set will go to protection mode. You can understand it well, as it did worked fine at the repair shope. The set has no fault at all, but the wirings, connects to it have.
Just power ON the set at your home, without connection any output or input to it. See, it will not show any protection mode display. Switch it OFF. Connect the output to speakers, one at a time, and switch ON the set. Just do it for all other speakers. This way, you can find out, which speaker line causes the set to go to protection mode. Fine out the reason.
Never connect any input to the system, until works fine with out showing any protection display.
I helped you somewhat fine, I assumes.
Ok.

Jan 31, 2012 | Teac Audio & Video Receivers

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NAD T752 Hi, When powering up, about 4 second after, the amp turn in protection mode. Nothing is connected to the anp and it is clean from any metal dust. I found one transistor to be very hot. It's...


It could be entering protect mode because it has no speakers wired to it, have you tried connecting to all 6 speaker - out connections. Often, if an amp can't detect a load on all 6 channels it won't work. Also, have you checked the thermal fuses? a blown fuse could cause this problem.

Apr 07, 2011 | NAD T752 Receiver

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When turned on it says protect. instructions says that its a speaker short but i've checked and its not...please help


Hi,

Just as you already know, the receiver will go into protection mode when there is a short in the speaker wires or the amplifier was overloaded. verify that none of the speaker wire connections are loose at the back of the receiver or at each speaker. And verify that none of the wires are making contact with each other.

If it is, then remove the speaker wires and connect them again properly. After disconnection g the speaker wires, unplug the receiver for 10 to 15 minutes. This will make the overload protection back to normal

Try this and let me know. I hope this would solve the issue

Thanks

Feb 17, 2011 | Audio & Video Receivers

2 Answers

Speakers made popping sound and now receiver is in protection mode


It sounds like you have some wires that are touching cause the reciever to protect itself. Go over and check all wiring and make sure you have nothing touching. Unplug device while you are doing this and then when done plug back up and see if that fixed issue.

Jan 31, 2011 | Denon AVR-1801 Receiver

1 Answer

My denon avr1200 receiver once it is turned on goes into Protection mode. How do you reset or make work?


The reciever will go into protection mode when there is a short in the speaker wires or the amplifier was overloaded. What I would do first is verify that none of the speaker wire connections are loose at the back of the reciever or at each speaker. And verify that none of the wires are making contact with each other. Then label each speaker wire as you remove them from the reciever so you can re-install them correctly. After you have disconnected the speaker wires try unplugging the reciever for 10 to 15 minutes. Most recievers have a self-resetting overload protection switch and this should reset it back to normal. Now try plugging the reciever back in and turn it on without the speaker wires connected. It should be out of protection mode now. If it is still in protection mode verify that there is not a reset switch somewhere on the back of the reciever. If it is not in protection mode now then proceed to connect one speaker set at a time and turn on the reciever to see if it goes into protection mode. If it goes into that mode after connecting a speaker then that speaker is the cause of the problem. If it does not go into the mode after all speakers are connected then try turning the volume up. If it goes into protection mode then there could be an internal short on the amplifier or a incorrect OHM rated speakers connected to reciever. Verify that the speakers are rated the correct OHMS.

Feb 22, 2010 | Denon AVR-1200 Receiver

1 Answer

The receiver turns on and immediately goes to standby


The unit is going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

Nov 18, 2009 | Denon AVR-5700 Receiver

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After turning ON the power/standby switch, the unit(receiver) display comes ON (green light) then after approx.4-5 seconds the display goes OFF and the unit defaults back to the standby mode (red light). I...


Is the red light flashing at first?
The unit may be going into protect mode. Lets hope it has done the job and the receiver has protected itself from failure.
Protect mode can result from speaker wires touching each other or the Amps2_bing.gif metal case. Check that first.
It can also be caused by unstable ohm loads if too many speakers2_bing.gif are connected to any of the outputs especially zone 2.
If you can remove all speaker wires and turn the unit back on. If it stays on, turn the volume down on the main zone and zone 2 if connected. Then reconnect speaker wires.

Nov 16, 2009 | Denon AVR-485 Receiver

1 Answer

I have a problem with my kenwood hifi component it was PROTECT MODE pls. hepl me.


1st thing. check all ur wirning from receiver to speakers, check the terminals for a wire touched the pos to the neg connecting them to gether when that dose that the system goes protect, you could check the fuses too cause it may of blown when the system went protect

Dec 05, 2008 | Audio & Video Receivers

1 Answer

Protection error


I was having this problem and after research on internet found that this could be because of speakers wire being short. I recheck all the connections and most likely have short due to wires being stapled on the wall and staple causing short. It is working fine now for me. Check your wires...

Dec 02, 2007 | Audio & Video Receivers

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