Question about Sony STR-DE345 Receiver

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SONY STR-DE345 This amp has some weak spots on the mainboard as it keeps losing signal. Sounds like the blue relays or switches keep shorting or losing contact at the back of the board near the speaker terminals. Problem is: it is very difficult to get under the mainboard to resolder. Why did Sony not make the board accessible from underneath? It looks like hours of work to be able to get the board out when all they would have had to do was make a bottom removebale panel. I don't think it is worth the time. I call this unserviceable and not user friendly to say the least. It almost makes the unit disposable. Any thoughts? Thank you. Tom

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  • nilest Oct 31, 2008

    Dan. Thank you very much. You are right on top of this stuff. Very quick detailed response. I appreciate it. I will give that a shot. Have you had some with problems in the same area? I am assuming those blue things toward the back by the speaker terminals are relays or switches?



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Having repaired many of this model and other similar models, I can get at teh board relatively quickly. That being said, it is a poor design for repairs. It is, however, cheap and quick for manufacturing. Take your time and remove all of the board screws, the screws that hold down the heatsink and the rear cabinet screws. The whole board should be able to lift from the back with a little patience. Be careful not to tear any of the ribbon connectors. With the unit on its side, you should have access to resolder any questionable joints.


Posted on Oct 31, 2008

  • ABRsvcs Oct 31, 2008

    They should be relays I believe. Over the years I have repaired 1000s of units. I can't remember all of them, but you see patterns.




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I need a schematic or service manual for Sony STR-DE345.


i can download it for you..
visit this site for manuals of your unit it will help you answer all your questions.


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Feb 19, 2009 | Sony STR-DE345 Receiver

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The protect circuit is doing it's job....probably the amplifier
output stage is shorted.....have a technician check it..make
sure any / all bad connects are soldered when chassis is out
for service......................T.

Jan 04, 2008 | Sony STR-DE345 Receiver

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