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.

Dec 12, 2013 | Audio Players & Recorders

1 Answer

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 Players & Recorders

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

3 Answers

When i switch on my samsung HT-Z110 the word hello appears then protect thenit turned off!


Audio receivers have an output protection circuit called "protect mode", this is to protect the receiver from short circuit failures.The speakers and speaker wires are what I inspect thoroughly first, look for bare speaker wires,or bare wires that are touching each other at that point,check speaker wires at the back of the receiver for sloppy connections,etc.If all looks good then try disconnecting all the speakers at the receiver,then turn power on to see if it goes into "protect mode", if it does the the receiver probably has an internal short and will need to be sent in for service,if it doesn't go into "protect mode" then connect one speaker at a time back into the receiver until it does go into "protect mode" then which ever speaker you connected last is the speaker that is shorted(blown) and then you know that speaker is the problem and it will need to be replaced or repaired. Good luck !

Nov 29, 2009 | Samsung HT-DB600 System

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

1 Answer

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

Protect appears on display on kenwood kdc 3034


Disconnect all the speaker wires at the receiver and turn it back on. If itdoesn't go into protect mode, your receiver is ok.

Reconnect the speakers one at a time being sure to turn the receiver off each time you connect a speaker and turn the receiver on until your receiver goes into protection mode again.

When it goes into protect mode again, the last speaker you connected has a problem. Trace the speaker's wire to the speaker looking for cuts or shorts along the way.

If you have a multimeter, switch itto ohms and check the speaker for a dead short, if you show a dead short you have a blownspeaker. Hope this helps.

--Matt

Oct 07, 2009 | Kenwood Car Audio & Video

1 Answer

Kenwood dnx7100 in protect mode


Hi,

Your receiver is detecting a problem in the speaker wiring and is going into protection mode. If the receiver shuts off due to volume level, this can be caused by a poor connection, damaged speaker, insufficient gauge wire, or connecting multiple speakers to one speaker output. The connections at the receiver and speaker should be clean with the ends of the wire twisted tightly, preventing any strands from missing the terminal. Connecting two sets of wires together to add distance should be done with terminals and insulated to prevent the wires from touching each other. If using thin wire, replace completely with heavier gauge wire; do not add to the existing length. Be careful not to push the speaker wires in too far, this will cause the speaker terminals to grip the insulation and not the conductor. The speakers being used must have an impedance within the range listed next to the receiver’s speaker outputs, normally between 6? - 16?. The impedance of your speaker should be listed behind the speaker itself.

If problems continue, disconnect the speaker wires from behind the receiver and power the receiver on. The receiver will shut off quickly if there is an internal short and would need to be serviced if this happens. If it stays on, try connecting the speakers one at a time. Replace any speaker that causes the receiver to shut off.

Thanks.

Jun 24, 2009 | Kenwood DNX7100 Car Video Player

1 Answer

Protect mode shuts down the receiver


If this happens only when connecting the receiver, chech the receiver cable. If the cable is fine, receiver connector at the back of receiver is faulty.

Protect mode will kick in whenever a fault is detected.

You get the unit not powering up, and sometimes you hear a clicking noise, that is the protection switch that keeps shutting down the unit.

Causes that can start protect mode are:

Electrostatic harges on internal circuits.
Leave the unit unplugged for power for one hour or so, this will allow discharge.

Bad speaker wiring.
Check speaker wiring, try unplugging and plugging back, or start after removing one speaker at the time.

Internal fault.
Internal fault is the natural cause for protect mode. If all the above did not work, then the problem is a blown component or an internal fault. In this case the unit must be taken apart , tested and repaired by an experienced person.
If the unit is less than one year old, or if you want to get service, call Sony at the phone number listed on the product documentation.

Regards.

Dec 23, 2008 | Samsung HTZ-510 Theater System

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