Question about Sony STR-DE975 Receiver

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Center speaker does not work at times, seems like it may be loose connection? Sporadic - will work for five minutes and then cut out. Sometimes comes back if you tap the top of receiver. Have tried different speaker and new cable, but appears to be problem in receiver itself.

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I have had the relays fail on these. Try tapping on them to issolate. Larry's Electronics ledstiles@hotmail.com

Posted on Apr 24, 2010

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Str-d1090 sony no sound to center speaker


Yes, electronic components fail with time: switches, especially capacitors, there can be dust or corrosion acting upon connections; really a multitude of age related problems CAN occur. (Not necessarily but can.) The problem becomes cost vs. benefit for repairing and another unit of that age is probably an inexpensive fix.

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I have a sony str de-475 amplifier and the centre speaker stops working after about a minute. leave amp powered down for a while and it works again but only for about a minute


Try replacing the center speaker with one of the left or right speaker and run it for sometime ( do not connect the center speaker to any other channel ). If the system does not cut off the center speaker connection this way indicates a short in your center speaker.
But with the L/R speaker if the system still stops working you have a hardware problem and will need professional help to fix. 5.1 amps are complicated and difficult to access even for an experienced technician.

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Our Panasonic PT-50LC14 speakers keep cutting out. They work for a time, maybe 10 -15 minutes, then they cut out. Any ideas?


Did you ever fix this problem? I am having the same issue. I pulled the speakers and checked all the connections which seem fine. Funny thing is that when they do cut out, if I tap the side of the speaker panel that particular side will come back on as if it is a loose connection.

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I have just bought a used Marshall VS65R. When I


Make sure that when the audio from the speaker cuts, the headphones are still working (try it several times). If this is correct the problem isn't at the preamp or driver tubes. Try to locate the wire that is connecting the speaker with the amplifier. There must be a bad connection at this cable or at the speaker's coil itself. Try hiting with a solid tool (the back of a screwdriver for example) the parts and the connections (not the tubes, just the mountings) while the amplifier is working in order to locate a loosing contact. Once you find it use a soldering gun to fix the connection.

In case of a problem or clarification, don't hesitate to post.

Thanks and regards
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Stelios
direct FixYa link: http://www.fixya.com/users/technical114

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The amps in the receiver turn off and on all the time. The center channel rarely works, and the left & right channels turn off & on every 10-15 minutes as well as the subwoofer output. Is there...


loose connections,issues. disconnect center and front speakers from this receiver. turn on with rear and subwoofer. horrible sound but the point is it will eliminate the speaker issues and confirm loose connection if the receiver continues to behave the way you described.I have repaired a few for loose connections.

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My 31GT740 tv's picture is taking up to 5 minutes to come on...


There is possibly a loose solder joint in the horizontal drive circuit. There is a little coupling coil just before the horizontal output that will get loose. This should not be real expensive to have repaired.

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HI,
Yes you are right man, this problem occurs only with the cable problem, i can explain you, if there is a receiver problem means you won't get the sound its dam sure,
only if there is a cable problem you will get some noise or sound cut off with the speakers, so you please check the cables properly it will be alright.

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try using another speaker for the center channel and the left speaker, also watch your ohm load, most of the want a 4 ohm load. try to narrow it down to see if it is the speaker or the amp.

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1 Answer

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This sounds like a bad connection inside the receiver. A 5 minute fix with a soldering iron and about 30 minutes to get to it.
If you can solder you should be able to fix this yourself.
Dan

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