Question about Sony Audio Players & Recorders

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When I switch on my Sony STR-DB940 no sound comes before several minutes. Any idea what the problem would be?

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  • 3 Answers

Hi, Does it eventually power up? Check all your component (ie: CD Player, Tape etc) connections and especially the connections to the speakers. If you have any loose strands of wire touching the case it will cause problems.

Posted on May 23, 2019

Testimonial: "Hello, thank you for your interest :-) In fact, everything is working fine after several minutes. It seems that it needs a warm up to work properly. Sometimes it takes 5 minutes to give a sound, sometimes 15... Once it's hot, I switch it of, expect one or two minutes and try to switch on again, it works most of the time. It's like it needs to be warm to work as it should. I have tried to connect my speakers to B instead of A. I connected my CP player to other entries such like DVD or Tape but the problem remains. I opened the box to clean the dust and I saw that someone putted some tape around a radiator, maybe to help warming up? Do you have an idea?"

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6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE:

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Posted on Jan 02, 2017

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  • 93 Answers

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

  • 94 Answers

SOURCE: I have a sony str-db940, since it came back from

Check if you're using the digital cables like optical cable to get the audio from the receiver. If yes, please select the Input mode to AUTO by pressing the mode button repeatedly. If you're using a analog cables, please try to change the sound field and check. Press the A.F.D button repeatedly to change the sound field and try. You can also try connecting a different audio source like Cable box, dvd player and check the issue.
If the issue persists, please reset the receiver. To reset the Receiver, turn OFF the unit and press n hold the MODE + button and Power button till S.F Initialize appears. If the issue still persists, you may be having 90 days warranty after the date of repair or original warranty which ever is longer. Contact sony to resolve the issue.

Posted on Sep 26, 2009

dunnbiker
  • 8546 Answers

SOURCE: Rear speakers L and R not working and MD in and

I'm guessing these are separate issues.

Has either one ever worked and stopped suddenly?

From the manual:
"No sound or only a very low level sound is heard from the rear speakers.
>>> Make sure the sound field function is on (press SOUND FIELD - MODE).
>>> Select a sound field containing the word "cinema" or "virtual" (see page 33-35).
>>> Adjust the speaker volume (see page 72).
>>> Make sure the rear speaker size parameter is set to either SMALL or LARGE (see page 20)."

Be advised that using any Tape Monitor loop (that's what the MD/DAT is) disables any digital sources. Not that that would explain the rear speaker failure. Analog sources can still be processed into various surround modes.

Any Tape Monitor use requires at least a live INPUT to hear anything.

Posted on May 29, 2010

Testimonial: "I have steel problem with thr rear sppakrs."

dj_relly999
  • 4070 Answers

SOURCE: STR-DB940 Sony receiver will not send sound or

Hi and welcome to FixYa!

Check the back part of the unit. It usually has a fuse that protects the unit from power overload. But since the unit is working then the problem can be on the inside. Capacitors and circuit boards should be looked at. They may need replacement to resolve the issue.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on Jan 06, 2011

  • 256 Answers

SOURCE: STR-DB940 is losing "voice" sound while the background music continues to play at the selected volume level.

The output transisters are going on it,

Posted on Dec 05, 2012

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1 Answer

Rear speakers L and R not working and MD in and out not working on my Sony STR-DB940


I'm guessing these are separate issues.

Has either one ever worked and stopped suddenly?

From the manual:
"No sound or only a very low level sound is heard from the rear speakers.
>>> Make sure the sound field function is on (press SOUND FIELD - MODE).
>>> Select a sound field containing the word "cinema" or "virtual" (see page 33-35).
>>> Adjust the speaker volume (see page 72).
>>> Make sure the rear speaker size parameter is set to either SMALL or LARGE (see page 20)."

Be advised that using any Tape Monitor loop (that's what the MD/DAT is) disables any digital sources. Not that that would explain the rear speaker failure. Analog sources can still be processed into various surround modes.

Any Tape Monitor use requires at least a live INPUT to hear anything.

May 29, 2010 | Sony STR-DB940 Receiver

1 Answer

The digital sound is off after 1 houre str de sony str de 485


It sounds like the receiver is either failing or going into a thermal protection mode.

There should be NO reason why the input source (digital versus analog) should make a difference unless you play the digital sources obscenely louder than the analog ones.

If you suspect heat, you should be able to feel it.

Can you verify that the digital sources ONLY do this?

Mar 01, 2010 | Sony STR-DE485 Receiver

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Hello,When the amp is turned on there is no sound the amp has been fine up until now what should i check?


I have the same problem. Over the night the sound disappeared. It happens on all the inputs(analog/digital) and with speakers/headphones. The digital signal is correctly detected and all the 'clicks' are like before when turning the amp on. Switching to direct mode does not help. Is there schematics available somewhere? I suppose it's some output related soldering which has come loose. If only I knew where to look, or point a local service guy to right direction...

Dec 15, 2009 | Sony STR-DB940 Receiver

1 Answer

Is it possible to setup lip-sync on the DB940?


no adjustments in that unit for timing

Nov 02, 2009 | Sony STR-DB940 Receiver

1 Answer

I have a sony str-db940, since it came back from being repaired, it reports 'not in use' when the 'sur' button is pressed and won't decode surround sound. Any ideas?


Check if you're using the digital cables like optical cable to get the audio from the receiver. If yes, please select the Input mode to AUTO by pressing the mode button repeatedly. If you're using a analog cables, please try to change the sound field and check. Press the A.F.D button repeatedly to change the sound field and try. You can also try connecting a different audio source like Cable box, dvd player and check the issue.
If the issue persists, please reset the receiver. To reset the Receiver, turn OFF the unit and press n hold the MODE + button and Power button till S.F Initialize appears. If the issue still persists, you may be having 90 days warranty after the date of repair or original warranty which ever is longer. Contact sony to resolve the issue.

Sep 26, 2009 | Sony STR-DB940 Receiver

1 Answer

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.

Oct 06, 2008 | Sony STR-DB940 Receiver

1 Answer

Sony amp str-db940 - protection


Somewhere in your speaker wiring, you have a shorted wire. This short can be as simple as a single strand of wire touching the other terminal on one of the speakers.

With a bright flashlight, look carefully at the back of the receiver and then the speakers for any loose strands.

May 27, 2008 | Sony STR-DB940 Receiver

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