Question about Sony STR-DE1075 Receiver

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Intermittent audio from Center Channel

Center channel output is intermittent. I have fiddled with the speaker cables (banana-jack terminated), and I don't think it's a connector problem. Sometimes I can get the center channel output by turning it off and on again from the front panel surround setup menu, _without_ touching the cables. Sometimes I can move the cables around a _lot_, and the center channel doesn't cut out. Are there any known problems with this model and the center channel? All the other outputs (LF, RF, SL, SR, SW) are fine.

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6 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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  • 5 Answers

SOURCE: Sony STR-DE845 center channel cut out, receiver clicks

I have fixed 3 shorts on my de845. 2 have been caused by cracked solder joints. they were speaker cutout problems...yours most likely is the center channel relay on the main board. take the thing apart. you need to get to the back of the main board and re-flo those solder joints. get your geeky pc buddy and do it together(buy him a sixer). its really not that hard...just a bunch of screws. disconnect everything from the main board including the front plate. be careful with the ribbon cable...mine is hurting at this point. not meant to be removed so many times. put it in straight. my leads bent, but was able to straighten them. there are 5 relays together, one for each channel. they are white cubes and prb a little smaller than the tip of your finger. its the 4 leads on each of these that you want to take a soldering iron to . i'm not sure which ones the center channel so do them all in that area. it may be hard for you to tell which leads they are so just go overboard and at least get everything in the vacinity. i did all component leads because who's to say another's not ready to go bad. you've gone this far. touch the heated up tip to all the leads at the very end of the barb. you can reflow the solder without actually touching it. the metal lead will get hot enough. hold it until the solder liquifies, then let it cool. do this on a flat surface. my other fix once was a re-seating at the speaker switch a,b,a+b on the front plate. there are 2 boards plugged together there. i bent the leads slightly so they seated in more tightly. if your left or right front goes out, sometimes thats an easy fix...try b if you're using a, or the opposite. don't forget the speaker cables. if you're using both zones then you prb already figured out you need to re-flo! test and cross your fingers. good luck.

Posted on Jul 27, 2007

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dunnbiker
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SOURCE: Center Speaker Audio Very Distorted

Love your screen name.

You didn't say what, if anything, preceded the appearance of the problem. There might be a clue.

Can you describe the distortion? Is it excessively bassy? If so, is it happening on all sources?

I'm assuming this is a modern digital receiver that is capable of many soundfield simulations as well as native Dolby Digital, DTS, multi-channel. If so we can use a stereo source and through simulation redirect some of it to the center speaker.

Using one of your receiver's many multi-channel simulation modes, put in a CD or tune an FM station and use it to diagnose the problem during later steps.

If it's only a single source and that source uses individual analog channel RCA cables, swap in another one or temporarily move the Center Channel feed to one of the other channels to see if it's before the receiver (in the source).or inside the receiver.

For multiple sources:

Is your Center speaker defined properly as Large or Small in the receiver's setup menu?The size refers mostly to the bass-handling capacities of all your speakers rather than their physical size. Speakers designated as 'Small' will not be sent much in the way of bass because they can't handle it well. The LFE/subwoofer channel(s) will get all the bass that was intended for them instead.

If you have a Small speaker improperly defined as Large it may be getting bass that it can't handle and that might sound like distortion. Having a Large speaker defiend as Small would result in less bass than expected but otherwise 'clean' sound.

Check the speaker setup in the menu for excessive volume level relative to the others. There is usually a calibration procedure the receiver will use to help you adjust the subjective voume of each speaker using white noise or tones.

Hope this helps.

Posted on Apr 02, 2009

  • 4234 Answers

SOURCE: Panasonic DMR-HS2 RF out is not outputting signal CH3 CH4 off

The most likely cause of this is the unit being in progressive scan mode. In progressive mode, the composite output is disabled. If you can, connect the DVD using the component output connections. If your TV does not have component input, connect the green connector to the yellow on the TV. If the unit is in porgressive scan, you will see a garbled picture on the screen. The only way to fix this is to turn off progressive scan. The manual will tell you how to do this.

Dan

Posted on Apr 10, 2009

  • 93 Answers

SOURCE: no sound out of rear speakers

I don' know what type of system you have, but try to switch system to "SURROUND" mode, or "DSP" mode.

Posted on Jul 14, 2009

  • 5 Answers

SOURCE: Sony STR-K670P Surround Reciever. No output from

This is a common problem that a lot of people have with this system. The problem is in the connection of the Left and Right Speakers to the receiver. I had this problem too.
What you need to do is actually open up the receiver using a screwdriver. Once it is opened up you will see a circuit board and lots of wires. Look for the red and blue wire that should be pretty easily visible. Cut each one, then strip the ends some, and reattach the ends but to the opposite color- make sure to solder it as well. On some models they messed up the connections and it got switched. Once you do this, the left and right speakers should work great. Hope this helped!!

Posted on Sep 22, 2010

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