Question about Onkyo TX-SV525 Receiver

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Reads PROTECT on the display of my Onkyo TX-SV525 ???

I have traced the amplifier circuit and found one shorted final transistor with a burned resistor associated with the transistor.The bad transistor was the left rear channel.I replaced both rear channel transistors with a new matched set and the burned resistor.I found no other problems in the circuit.I powered it up and the display reads PROTECT,with no output.I have a service manual,but I can find nothing about the protection circuit....

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Re: Reads PROTECT on the display of my Onkyo TX-SV525 ???



Posted on Oct 23, 2007

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Where are the fuses located in onkyontx-sv525- only found 1 at power in

If you pulled the cover and only see one fuse, and if it is not blown, then you need to search deeper for the problem. All replaceable fuses on the main board are viewable.

May 08, 2015 | Onkyo TX-SV525 Receiver

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Onkyo tx sr604 turns off as soon as i turn it on

Your unit is going into protect mode. More than likely because you have a bad channel. Take a DVM on diode check and test all off your outputs. Once you find the pair that is shorted, you will need to replace both outputs and all of the transistors in that circuit. You will also need to check your low ohm resistors in that circuit as well as your duel emmiter resistor.

May 17, 2012 | Onkyo TX-SR604 Receiver

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Can you hook an iPod up to an Onkyo TX-SV525 receiver?

yes. use adapter cable, connect iPod to an input on the receiver like CD or AUX and select this input on the receiver. See below pic.alexander404_5.jpg

you can buy these adapter cables online or at Radio Shack etc.

Apr 29, 2011 | Onkyo TX-SV525 Receiver

1 Answer

Receiver goes into protect mode after fifteen seconds of pushing power button. I think a pair of speaker wires crossed.

The manual is here:

Power it OFF before handling any wiring.

You could verify if any speaker wires being shorted is the problem by just disconnecting all of them and trying to power it up. If it fails to power up, it's sick and needs a hands-on tech to look at it.

If you don't actually SEE the problem while disconnecting the speakers, but the receiver DOES come on, try reattaching one at a time until you either have found the offending speaker/wire combination or you have success in turning it on and using it.

Speakers can be shorted, too. So if you locate a channel giving you trouble, say, front right, you could swap a different speaker or wire set into its place to prove if it's external or internal to the receiver.

Going forward, make sure you don't run the unit too loudly and give it plenty of room for cooling ventilation.

Jan 01, 2011 | Onkyo TX-SV525 Receiver

1 Answer

My onkyo receiver say protect

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).

Jan 29, 2010 | Onkyo TX-8011 Receiver

1 Answer

My onkyo tx ds747 is saying protect even if i dont have anything plugged in to it! can you plz help me


maybe you have defective power transistor output and this is shorted, or the problem is in the power section like shorted diode shorted capacitors or open circuit may cause this, and the STK IC if shorted you got protect warning..


Aug 02, 2009 | Onkyo TX-DS747

1 Answer

Can you tell me if my receiver is digital? The model is TX-SV525. My E-mail is Thank you.

your tx-sv525 audio video control tuner amp is has full analog connections therefore it is analog.

Mar 03, 2009 | Onkyo TX-SV525 Receiver

1 Answer

Onkyo tx-sr602 as soon as i turn receiver on it flashes protect

Does it display any message like "Protect" or something similar? Do you hear a relay click on then off?

Did the amp just not power up one day or did it stop working while you were listening to it? Finally, do you have teenage kids who might have been listening to your receiver and would have "neglected" to tell you that after listening to their music it suddenly stopped working?

It could be an internal fuse but chances are its something that requires a technician to repair (like the output transistors).

Dec 29, 2008 | Onkyo TX-SR602 Receiver

2 Answers

Onkyo TX-SV525 Receiver

Ve a,Suerte.

Mar 29, 2008 | Onkyo TX-SV525 Receiver

1 Answer

Onkyo TX-SV525 on and off

Look under the wide ribbon cable going to the front panel. There is a cluster of components on the main board that make 12V and 6V power for different things. There is a pair of 12 ohm and a 1 ohm resistor. These run very hot and over time will take out the motherboard underneath. If these resistors disconnect the unit will cycle on and off rapidly. I found this out when I was replacing the resistors and repairing the circuit board.



Sep 23, 2007 | Onkyo TX-SR601 Receiver

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