Receiver keeps shutting off please help

[bigbassdave]

Hey guys,
I bought a new Onkyo TX-SR702 receiver. I hooked everything up and as far as I can see it all looks like it was done correctly. I checked and double checked to make sure I didn't mix up any of the positives and negatives. The problem is, everytime I turn it on it plays for a minute or so then shuts off. As it shuts off it says, "Protect" on the led display. I looked in the manual and all it says is that I should call onkyo. I tried this and I can't for the life of me seem to get ahold of anyone. The problem seems like it happens in parts of movies with lots of bass. Though, I'm not sure the sub is the culprit. If anyone has any ideas as to why this might be happening I would really appreciate it. Thanks

 

[Polkfan]

What kind of speakers are you using, and what are their impedances?

 

[bigbassdave]

I'm using Infinity fronts (beta 50's) and infinity center. Polk rears and a polk psw505 sub. I'm not sure of their impedances. How can I find out?

 

[Polkfan]

The beta 50's are 8 ohms with 91 dB efficiency, so that should not be a problem. I was wondering if you were using any four ohm speakers. They could cause your receiver to go into protect mode. It could be an electronic issue with the receiver.

How do you have your sub hooked? Are you using the sub's pre out or are you running direct from the speaker outputs?

 

[bigbassdave]

I have the sub hooked up to the sub pre out. The cable running to the sub itself is in the LFE input (unfiltered) so I can just use the crossover on the receiver instead of the one on the back of the sub. I'm thinking I might be using wire that is too thick (12 guage). It is hard to get it into the back of the receiver so maybe I should trim it up or just buy 16 or 14 guage. Maybe if my wires fit better it would solve the prob????

 

[perato]

Trim it up? Are you using bare uninsulated wire? You should use reasonably shielded and insulated wire terminated with RCA connectors for your interconnects, including subwoofer cable. You can get such cable from Radioshack or any consumer electronics retail store such as Circuit City or Best Buy. Bluejeanscable and Impact Acoustics also sell cables. You should peruse the Audioholics website, there is plenty of information about choosing interconnect cable and speaker cable. Also, make sure the wires you have installed are not shorting out. I have had a TX-SR701 (connected to nominal 8 ohm speakers) for about a year now and I never had any such problems.

 

[crashguy]

There are 4 things that can cause what you are experiencing. From most likely to least likely:

1) Strands of wire are sticking out of one terminal and touching another (wire supposed to be hooked up to red terminal touching black) causing a short. Check the connections at the speakers AND at the back of the amp.

2) Defective receiver.

3) Speakers with too low an impedence.

4) Burnt speaker or partially blown driver within a speaker.

In my opinion, it's probably number 1 or 2. Also, on the topic of 12 gauge wire, that will not be the cause of the problem at all unless it is tied in to reason #1. Thicker wire will transfer more power more easily (though this is unlikely to cause an audible difference unless you are running the wire for very long distances between speaker and amp).

 

[bigbassdave]

I think the prob was some of the wires were touching in the back of the receiver. I re-did everything and its working great now. Thanks for all the help

 

[markw]

Some cheap insurance...

I think the prob was some of the wires were touching in the back of the receiver. I re-did everything and its working great now. Thanks for all the help

This is a vary good reason to invest in some banana plugs. RatShack sells some inexpensive ones that work fine and can prevent this kind of things.

 

[Vancouver]

Not sure if you have thought of this yet, but most if not all recievers will shut off if they over heat. It sounds to me that if you watch a movie with lots of base and your volume is high perhaps the recevier is over heating.

Solution...make sure there is space around it and has room to "breath".

 

[crazy_j]

Glad I read this

Thanks Crashguy, I had the same issue this week, except my receiver fried! I noticed I had some strands from the wires touching each other on the wall plate. Time to invest in some 'nanna plugs.

Jay

 

[howie85]

I used Mstr bannana plugs that you stick the wire in from the back and then fold the strands over and tighten the parts together. I got a tight fit and the wire comes straight out the back so the hook up was easy for the receiver. I did not want to wait for an online order so i had to pony up for the expensive ones. There others that use this type of connection and IMHO if you change your setup and have to reuse them it is easy and quick to swap them to different wires. I have used solder and crimp before which are not readily reusable, and these were the quickest and easiest I have used yet.
Edit
I have to apoligize for the use of the M word. I retract any support of that company from here forward due to their unfair actions toward anyone unfortunate enough to have used the same word that they think they now own. I was unaware of their actions unitl today.
http://www.monstervintage.com/
link on left side of page or scroll down to bottom

 

[Polkfan]

I think the prob was some of the wires were touching in the back of the receiver. I re-did everything and its working great now. Thanks for all the help

Glad you figured it out. The 702 is a decent receiver.

 

[bigbassdave]

Vancouver, thanks for the idea but, the receiver is very well ventilated and would shut off only a few seconds to a minute after the movie started playing. I don't think the bass had anything to do with it. Instead, I think it was just coincidence that it was shutting off when the bass would hit. Bannana plugs are in my plans. I actually work at Circuit City and will pick some up on my next shift. Thanks again for all the advice fellas. If I have any questions in the future I will hit you up

 

[bigbassdave]

So I've had a little time to test this now and the receiver still hasn't shut back off. Thanks again for the solid advice

 

[Adam]

You might want to give it just a little more time before drawing any conclusions. Please report back again on this day in 2025.



(Really glad it's still going strong.)

 

[bigbassdave]

Haha thanks. In all seriousness I sold the 702 to a good friend about 6 years ago and he still uses it.

 

[Adam]

Btw, I think it's awesome that you posted exactly a decade later!

 

[bigbassdave]

Btw, I think it's awesome that you posted exactly a decade later!

Thanks! I've been looking forward to this post for about a month