Question about Yamaha RX-V520

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Yamaha RX-V520 When power turns on I get a message "check speaker wires" then the power goes off.Now it won't power on at all.I don't have anything hooked up to it. Do you have any idea what this is or do you know of a service manual for this model.

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If you don't have any speaker wires hooked up to it and it won't turn on, the only thing left to check is the internal fuse. First, make sure it's unplugged from AC, then remove the top from the receiver, 6 or 7 small phillips head screws. At the back inside corner where the AC comes in there is either one or two fuses, check them. If you have a multimeter, dial it to resistance & sound (meaning when the two probes touch you will hear a tone) touch both ends of the fuse with the probes, if you get tone, fuse is good, if not, replace the fuse and all should be well. If you get tone, you've got either bad transistors or a bad power supply. Could be a 100-200 repair. Hope this helps

Posted on Jun 11, 2009

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if it stays on whit no wires attached than u have short connection at speaker wires .
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may sound like BS but if amp board don`t have good ground connection it can go in protection mode happened to me on RX-V592

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Protect, Protection, Protector, etc. are all indicators of a problem with the output (speakers) of the device. Most times, if you're lucky - you'll find a shorted speaker wire. Other times, it can be an expensive fix. Hopefully, you shut it off right away without cranking the volume up.

Start at the rear of the unit. Make sure no individual strand of the speaker wire has touched the binding post of an adjacent speaker. Continue along each speaker wire to the binding post or termination point on each speaker. Make sure the insulation along the entire length of all the wires haven't become crushed or damaged where they pass under rugs, around corners, etc.

If you can't find a problem, you can try disconnecting all the speakers and plugging in headphones. and power on again. If the Protect message is clear, you should be able to hear the program through the headphones and have full control over the volume. This means there is stall an issue with the speaker wire(s) from the back of the unit up to and including a speaker(s).

If it still indicates Protect, the original problem continued long enough or the volume was turned up high enough to cause an internal failure of the amplifier's output transistors and will require service t restore to working order again.

I hope this helps & good luck!

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Hi,
Check speaker wires, any wire seems shorted and causing Protect Unplug error message in receiver.
Good way to sort out bad wire is plug one speaker at a time, turn On receiver check, turn Off, then plug next speaker wire until you find out what speaker wire activates protection circuit of receiver.
Thanks.

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if overload warning displays only when you activate speakers "a",,, please check your wiring and speakers
for that channel, first remove both A speakers turn it on, if its okey plug one speaker and try again if okey remove it and try the other one, when you see which one is it check the wire and the speaker ( every time you hook the speaker turn it off before that) overload means something is shorting and that protects the unit to prevent furter damage

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1 Answer

Stops working after a few mins with cd player playing


One of three things: speaker wire short, shorted/or blown speaker, or a bad output chip. First and easiest way to check is to disconnect all speakers, turn it on, turn it up, and wait. If that's ok, begin connecting one speaker at a time with the unit off, then turn on and play. When you get to the speaker or wire with the problem, it will short and go into protection. Disconnect all speaker wires again and only hook up the speaker that shorted the receiver and test. If it shorts, swap speakers with the same wire and test again. If a different speaker on the same wire causes the unit to short, replace the wire. if it doesn't, you need to test the speaker with a multimeter or disassemble if possible, check the wiring internally on the speaker. Check the impedance, should be 8ohms or 6ohms depending on the drivers. then check for resistance. If your meter says 1... it's shorted and needs to be replaced. Hope this helps

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Hi there

May I ask how many watts can your reciever handle ? And how many watts does your speakers need in order to be powered up (input). The two speakers you have installed might be too powerful for your reciever to handle. You might have to down grade to less powered speakers. All in all you have an excellent product there good choice...

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I just hooked up my old Onkyo TX-8511 receiver to my bose speakers, which is also hooked up to a subwolfer. When I turn the volume up the system goes into protect mode. Any solutions.


Just check your speaker cabling again. Make sure that all of them are seated properly, none is touching each other or the body of receiver. Rewire if necessary..
Are you using banana plugs for connecting speaker or just directly. Some times even a little tiny wire touching the receiver could trigger the protect mode. Be careful, since protect mode is sometimes not fast enough and it could blown a few trasistors in the power circuit.

Otherwise, do your bose speakers play out load on other systems?

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Unplug all the speaker wires first, then unplug the unit from the wall for at least 24 hours, The plug back in without the speaker wires or anything else plugged in. Then see if it goes to the protection mode. If it does not, plug in each speaker at a time, and see if any speaker, when hooked up, makes the receiver shut down. If it does shut down, My friend, I'm afraid you will need to take this unit into a repair shop, OR get a new unit. Good Luck

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