Question about Sony STR-DE935
One of the power amplifiers usually fail. If you are not an electronics engineer, get someone else who is competent to repair it.
Posted on Mar 30, 2017
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Posted on Jan 02, 2017
SOURCE: sony str-db940
Most likely a cold solder joint somewhere in the audio circuit. Most likely on the legs of the relay that turns the speakers on or off. Also check the connections at the audio outputs. Give it a good look over for bad solder connections, given the symptoms that's 98% likely to be the problem.
Posted on Oct 06, 2008
Oct 23, 2008 I have the same "Protector" problem. There is mention of this on Sony's website:
Follow the steps below to troubleshoot if the word PROTECT or PROTECTOR is flashing on the A/V receivers display.
I followed their "advice" to troubleshoot...now my unit's been in the shop for a couple weeks.
I called for status today 10/24/08 and was told that there is a "backorder on a part". My repair
shop cannot estimate when the "part" will be available.
SO...I suspect a component failure and since Sony does not have the part, the questions are:
1. Is there a delay in Sony getting the needed part from the manufacturer (if it's not Sony)
2. Are there so many occurrences of this problem that Sony can't keep the the "fix part" in stock!!
Time will tell!
Posted on Oct 24, 2008
I had this problem last night.
To solve it, you can reset the amp by:
1) Put the receiver on stand-by
2) Hold down "MODE" button and press on button
3) "S.F. CLR" appears in the display and surround is back on.
Posted on Feb 10, 2009
your problem is a bad solder connection of the relay linked to the lautspeaker sockets. I had the same problem and googled for the solution. Since I resoldered the pins everything is fine. That problem is well known and happens to a lot of Sony receivers.
I can send you a link with a detailed how-to-do solution with pictures, however it's written in german language. But you can use some online translators.
Here is the link: http://www.bmw-syndikat.de/bmwsyndikatforum/topic.asp?TOPIC_ID=28280&FORUM_ID=20&CAT_ID=9&Forum_Title=Geplaudere&Topic_Title=Problem+Sony+STR-DE445
Ralf (from Germany)
Posted on Feb 15, 2009
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