Question about Sony STR-DE945 Receiver

1 Answer

Sony amplifier problem

Hi, I have a Sony amplifier and its stopped outputting any sound. I tried to turn my speakers on full volume I can hear the sound slightly.All of my equipment is connected correctly...... Do you have any idea what the problem could be? Output fuse has blown perhaps?

Posted by on

1 Answer

Re: Sony amplifier problem

I has the exact same problem with the same reciever. It was the neg and positive wires getting too close. Don't join wires together to get the length you want. Make sure you use atleast 16ga wire with NO interconnections. My short went right through electical tape when turned up. ng

Posted on Oct 02, 2007

Add Your Answer

0 characters

Uploading: 0%


Complete. Click "Add" to insert your video. Add


3 Points

Related Questions:

1 Answer

I have the following setup: AV Receiver: Pioneer

Very common problem with today's receivers. Receivers made today don't have a true preamp section in the amplifier and do not amplify the sound to the extent of an older receiver. I have large 15" front speakers on my system, and have stuck with my 15 year old receiver just because I know that a new receiver will not have the power to drive them well. Many of the newer receivers need to be turned up to 50-60% before you can even hear anything from the speakers.

Aug 08, 2013 | Pioneer Audio & Video Receivers

1 Answer

Everytime i try to play my system at full volume it cuts out then keeps playing and carries on doing this to i turn it to a certain volume

First of all find out the recommended speaker impedance for the receiver. Then find out the impedance of the speakers you are using along with it.
Simple rule is the speaker impedance can be higher but not lower than the recommended value. If it is so the receiver will run hot and if you turn up the volume higher it will run even hotter and then the protection circuit will cut off the Amplifier output to prevent burn out of components. Even if you have one defective speaker this cut off can happen. To confirm defective speaker -- disconnect one speaker at a time and turn on the amplifier and play it at cut off volumes.If by disconnecting one particular speaker the Amplifier does not cut off -- THAT SPEAKER HAS A SHORTED COIL and needs replacement.

Apr 03, 2011 | Philips Audio & Video Receivers

1 Answer

Im having kenwood home stereo system model no xd-v818 high volume about 80 the sound starts to distoriate and the voice is not clear..i want to kno wether the stereo deck is not able to provide...

Well, here is the situation as I understand it. Here is also some theory to help you out.
Your Receiver or Amplifier has a "scale" showing relative volume. Distortion always increases in speakers and amplifiers when you turn them up. If the sound is getting extremely distorted, the Receiver is attempting to operate above it's maximum output. The scale is an average, but because music recordings are often mastered at different levels, "80" may be too much. When an amplifier section of a receiver is over driven, the distortion (which you observed) will damage or burn out your speakers. Most likely the tweeter (high frequency speaker)
If you back off the volume, or turn down the output of the deck until the sound becomes clear, then that level, IS FULL VOLUME. Based on what you are saying to me, I don't think anything needs service.
There is one other very important thing I should mention to you
. When people use high powered equipment and initially turn up the sound. After a short time, the mind turns it down. What next happens is the reason professional musicians and sound engineers often have permanent hearing loss after a relatively short time.
What happens is that the listener and often the engineer running the sound board at a concert thinks the sound is not loud enough (when the audience is happy with the level) and turns it up. After turning it up, his mind (and the audiences') turns it down and then he thinks it not loud and then again turns it up. And up. And up. The only reason I'm not deaf is that I discovered this when I was building sound systems as a kid. I also studied about it. So please be careful when you play things loud. Permanent hearing loss starts to occur at the very high frequencies and rolls down from there over a period of time. Hearing loss can start to occur in just a few hours.
at 110 decibels. It doesn't come back. If you understand this, you'll keep your hearing.
I hope this helps,
Best Regards,

Jan 22, 2011 | Audio & Video Receivers

1 Answer

Suddenly, amplifier stopped giving out sound. Controls and display seem to work fine. If it is blown fuse, where is it & how can i replace it?

Does it stop on both channels? It sounds to me like the safety circuit is activating. This usually happens when either the volume is too high, or the speaker load is too great (i.e. usually loads less than 4 ohms will do this) or, the amplifier has an internal short causing the amplifier's output stage to become un-balanced. Does the sound come out nice and clearly through both channels? How long does the receiver play before the sound stops? How loud are you playing the music when it stops like this? If the sound is reasonably clear through both channels at regular volume, then there is probably nothing at all wrong with the receiver's output circuits. If the amplifier is being played at regular volume or even lower volume for quite a while and then quits, perhaps the receiver is getting too hot and it's thermal sensors are activating the protection circuit. Make sure that when you operate the receiver, that there aren't things laying on top of it blocking the unit from venting and cooling properly. Make sure it has plenty of breathing room - amplifiers (most of them anyway) are inherently subject to producing heat. If the amplifier only quits when played at high volume, well then that's probably the problem - it's probably not meant to deliver such power that you're asking it to - especially if you're driving a heavy load such as 4 ohms or less. If you're running several speakers on this unit, try scaling back to just two speakers for now, and make sure these are 8 ohm speakers. Play the unit for a while and see how it does.

Oct 24, 2009 | Aiwa AV-DV95 Receiver

1 Answer

No audio output

Were you playing it very loudly when it died?

The manual is here for reference...',600,560,10,10,'Manuals'

It discusses troubleshooting this problem on page 50.

When you turn the receiver ON does you hear a light click in about 5 seconds? That would be the protection circuitry turning OFF to allow the amplifiers to function. The delay is to allow the circuitry to stabilize before it sends any output to the speakers. If you don't hear a click the unit is Protecting the speakers due to malfunction somewhere.

If no click and no apparent messages try turning the speakers OFF using the Speakers button directly below the Power button (1/0). This will eliminate or point to external shorts as the cause.

Does the unit click after 5 seconds of Power ON with the speakers OFF? Isolate your shorted speaker or wire problem.

Still no sound at the speakers when you turn them ON?

We need to establish if there is any programming flowing through the receiver.

A quick basic check would be to tune an FM station, if you have a tape deck attached, place it in Record or Record/Pause mode so it can display the input signal levels. You should see the record meters fluctuating with the level of the program selected. If you don’t have a tape deck, run an RCA cable pair from the audio output for a tape deck to an analog audio input on your TV. Select that input on the TV and you should hear the FM station, or anything the receiver is configured to play. If it's silent then there is no audio signal circulating in the receiver to get out to the amplifiers.

If you hear the program on the TV but not through any attached speakers, then the amplifiers are all disabled for some reason.

If there is no audio flowing through the receiver the problem could be a switch in the wrong position, source not selected, muting on or a multitude of other things.

Let me know how this turns out.

Apr 03, 2009 | Sony STR-DE695 Receiver

1 Answer

Speakers stopped working.

More than likely you have blown outputs, as the sound you hear when you touch the leads to the terminals is the DC offset of the power supply being routed through your speakers...accordianman

Jun 09, 2008 | Aiwa AV-DV75

1 Answer

Sony STR-DE635 Receiver-no sound at all

sorry my expertise is in appliances, youl need to repost you question to another tech

Mar 21, 2008 | Sony STR-DE635 Receiver

1 Answer

Sony STR-DE635 Receiver-no sound at all

Turn your volume down,press the tape monitor button.then turn up?

Mar 20, 2008 | Sony STR-DE635 Receiver

1 Answer

Sound turns off for Sony STR-DE875 amp

If you do not here a click as soon as the power is turned on, (note you must be in a very quite environment no noise absolutely to hear this) then the amplifier has blown output transistors which are pushing DC current to the speakers.

Aug 31, 2007 | Sony STR-DE875 Receiver

Not finding what you are looking for?
Sony STR-DE945 Receiver Logo

Related Topics:

228 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sony Audio & Video Receivers Experts


Level 2 Expert

112 Answers

Cindy Wells

Level 3 Expert

4720 Answers

Pieter Vleeshouwers

Level 3 Expert

1329 Answers

Are you a Sony Audio and Video Receiver Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides