Question about Sony STR-DA3ES Receiver

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Noise and popping on Sony STR-DA3ES

No problem on this unit since it was new. Tonight it started some strange behavior. When ever the sound input changes, like from menu to main movie there is a loud pop. Then during a movie when certain sound are present there is noise like rain on a roof. When the sound disappears so does the noise. Can detect some weak clicking and popping during quiet periods. Seem to just be coming from surround speakers. Wondering if it is just some dust on the circuit board. Any help would be appreciated. It appears I need to get a service manual.
Thanks,
Russ

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Sounds like its going to square wave clipping and poking a dc offset at your speakers. Happens when the amp reaches power supply ceilings. Pink noise such as "rain sound" will push the output stages and power supply to limits. If its on all channels, check power supply caps and check for dry solder joints. also look for that crappy brown hold down glue that goes conductive/corrosive. check all output stages particularly about discrete output devices that are attached to heat-sinks. They have a bad habit of dry jointing also. Good Luck

looked for a free manual on line for you
http://www.nodevice.com/manual/Sony/page139.html got heaps... but not your exact model. You may be able to cross reference one

Posted on Feb 03, 2008

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Service Manual for STR-DA3ES is available here -> http://www.eserviceinfo.com/download.php?fileid=51499

Posted on Jun 13, 2010

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