Question about Onkyo TX-SV454 Receiver

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Help when i turn the onkyo tx-sv454 on it gos in to protect mode then turns off

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Re: help - Onkyo TX-SV454 Receiver Audio & Video Receivers

You need to replace the internal fuse.

Posted on Aug 26, 2007

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Protect mode on my onkyo sv515proii what does it mean?

Generally speaking, an amp attempts to protect itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.

Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.

You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.

If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.

If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.

Check for loose speaker connections at the speaker as another possible root cause for intermittent shutdown.

Jul 30, 2011 | Onkyo TX-SV454 Receiver

1 Answer

When i turned on speakers both a and b the protect message came on--receiver is now totally disabled. help.

This means that you have a problem with the speaker outputs.
-Try turning the unit off and unplugging it.
-Disconnect all of your speakers.
-Plug it back in and turn it on.
If it works, check you speakers and wiring for shorts.

If it still shows protect then you probably have a blow output amplifier and it will need repair.

Mar 15, 2011 | Onkyo TX-SV454 Receiver

1 Answer

So what do i do if when i turn my onkyo tx-sv454 receiver on it says protect and then shuts off? How do i fix that or get around it? please help me....

I don't think you can fix it, unless you're skilled with electronics. Possibility that something has occurred internally with a circuit board etc so the system shuts down in order to protect itself from catching on fire etc. Get it services. Might not be too bad of an issue, but certainly not a bypass.

Mar 02, 2011 | Onkyo TX-SV454 Receiver

1 Answer

I have a onkyo tx-sr506 receiver that turns it self off

This unit is in protect mode. This means that a problem was detected and the unit has shutdown to prevent further damage. The most common cause of this is failed output transistors. Plan on $20-$40 for parts for this repair.


Nov 04, 2009 | Onkyo TX-SR506 Receiver

1 Answer

Onkyo TX-SV 727 PROTECT mode

Generally, this happens when there's a loose connection somewhere, either internally, or with the connections. It usually happens when the volume's too loud, and it tries to protect itself.

I'd suggest you unplug everything from it, check all the speaker wires, and then try turning it on, without any devices connected to it.

If it works, turn it off, and reconnect devices, one by one. That should fix it.

If not, it's likely that there's a loose solder inside, and it needs to be sent out for service.

Mar 19, 2009 | Audio & Video Receivers

1 Answer

Surround mode is set to OFF

I was able to solve this problem by using the "A" speaker jacks and eventually I pushed the right buttons to get the Surround mode to turn ON. I believe it was when I hit the Parameter Selection button that allowed the surround mode to become active.

Jan 18, 2009 | Onkyo TX-SV454 Receiver

2 Answers

Onkyo TX-SV444 problem

the shorted spkr wires probably fried the putput transistors in that channel.  Do you know how to use a Fluke  test meter on diode test

Dec 31, 2008 | Onkyo TX-SV454 Receiver

2 Answers

Onkyo TX-DS777 goes straight to protection mode

Hello.You have shorted audio outputs. One of your channels has shorted output transistors. If your unit uses output ICs then one of them is shorted. Both types ( individual transistors or ICs ) are located on the large finned heat sink. The parts are available from http:\\ good luck


Oct 19, 2008 | Onkyo TX-DS777

1 Answer

Stuck in protect mode

i believe protect mode is because you have the wrong impedence speakers, they are too low (4 ohm? 6 ohm?) it chols work with 8 ohm speakers

Aug 16, 2007 | Onkyo TX-SV454 Receiver

1 Answer

Amp keeps switching off

There is a problem with one or both of the audio amp circuits. The amp is going into a protect mode as to protect and save your speakers. Sorry but there is no simple fix. this will need to go to the shop to be diagnoised. Good Luck

Apr 29, 2007 | Onkyo TX-SV373 Receiver

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