Question about Sony DAV-S400 System

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Sony DAV S400

Please can you help our DVD player seems to have lost its sound and keeps saying that the headphones are on . We have tried everything we can but cant seem to turn them off and bring back the sound .

We have lost our manual so are not surwe what we should be pressing

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Hi U need to re-solder the headphone socket that connects to headphone jack at the front of the DVD player, once u have done this, it will work i had the same problem for ages till i found out the solution good luck

Posted on Sep 08, 2008

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Hello
I can confirm that this seems to be a commen fault. I have just fixed the same problem on a friend's machine, There seems to be a number of dry solder joints on the power board - the one that the speaker connectors are attached to. The big smoothing capacitor on this board was loose, but the 'H.P.' related displays were solved by resoldering all the joints on the base of the headphone connector plug. Follow the lead from the front panel headphone socket back to the power board and you'll find it.
You will need to remove the 2 screws from the back panel either side of the speaker connectors, also the ones holding the metal screening enclosure halfway down this board in order to ease it away. Also disconnect the connector from the main power supply board on the left. The board can then be inverted so you can get at the solder side. There is also a copper plated sheet under the board: this is stuck on with adhesive pads and can be easily prised off. Carefully remake the solder connections with a small soldering iron. I also remade all the relay connections as well, as it seems all the larger-wired components didn't seem to be particularly well tinned. You'd think that somebody like Sony would have got the hang of something as basic as soldering by now.
I just wonder how many people have bought these, and other Sony stuff, over the years only to have them fail. Have Sony ever acknowledged their culpbility in such shoddy work, or quietly just let the hapless consumer pick up the tab?

Posted on Nov 08, 2008

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Hi all, I hope someone out there can help me. Recently bought a new Samsung 46" LCD, I also have a Samsung BluRay player and HD Recorder in one, also have a PS3 and finally the Sony DAV-IS10. ...


It's unclear where the sound is emanating or where it is lost in this scenario or even the type of connection you're using to carry it.

It almost sounds like you're using the TV for sound or it's in the audio path. The sound from any high end source should be processed by the SONY DAV as close to its original device as possible and not unnecessarily patched through the TV.

The TV only NEEDS Video. High-end Audio is wasted on it.

The symptom sounds suspiciously like a loss of data from the source to the Sony DAV.

Please clarify or establish that this does or does not happen without using the remote. Sometimes remote commands are heeded by unintended devices. Try to Pause/Play sequence using front panel buttons on the unidentified Samsung BluRay to eliminate that possibility.


http://www.retrevo.com/support/Sony-DAV-IS10-Home-Theater-Systems-manual/id/2771ag604/t/2/

Observe the indicators on the Sony for any clues when the problem occurs.

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My sony dav-s-400 system keeps activating headphone port output.


Just had and fixed the same problem that hundreds of people are suffering with this system!!
Sony DAV s400 - same problem, won't play though speakers and display indicates that headphones are plugged in - when they are not. Fairly easy to fix and took me less than an hour from start to finish:
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3) Remove Amplifier circuit board (has the speakers attached)
4) Turn it over and remove copper heat shield
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Feb 03, 2009 | Sony DAV-S400 System

1 Answer

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Hi Joey - I had exactly the same problem.

In my case, I followed the advice of others and took the thing apart. On the main amp board there is a large brown capacitor. Mine had come completely loose, so I soldered it back in place with a good amount of solder to make sure the contacts were ok. I also dabbed some solder on the headphone connectors on the same board (just follow the wire from the headphone socket to the board). Well, when I put it back together and tried it again everything worked perfectly, and it has so far remained free from the error. Hope that helps !

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1fb55de.jpg

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The protect message indicates that a problem was found in the output stage of the amplifier. Unless this gets repaired, nothing will work. As a verification that the speakers or the wires are not the problem, unplug all of the speakers and try again. If protect still is displayed, the problem is inside the unit.
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