Question about Sony STR-DB940 Receiver

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Hi I have a sony db940 and it had bad relay output connections which have now been resolderd the problem is the sound seems to be slightly disorted no matter if the eqalizers on or off even through the headphones its the same ? I can be contacted at aitkenmartin23@yahoo.co.uk

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Posted on Jan 02, 2017

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  • 15 Answers

SOURCE: 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.

Posted on May 27, 2008

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  • 92 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

dunnbiker
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SOURCE: I am looking for

Model RC63CD is available for $58

http://remotes.com/remotes/servlet/rs?a=gmi&smodel=CD63SE&brand_pn=MARANTZ_CD63SE&mode=large&uuid=A12997911098241

or you could lurk around eBay and search for "CD63 remote" or "RC63CD remote" and maybe one will become available cheaper.

Can't help on the manual but from the pix I've seen its a vanilla CD player with all possible outputs - analog, coaxial digital and optical digital. Nothing unique or complex about it that would need explanation.

Try any CD manual and it would probably make you fluent in Marantz CD83-ese.

Posted on Mar 10, 2011

dunnbiker
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SOURCE: HI I have apair of

If you think you're smarter than the engineeers, go for it. [sarcasm]

Seriously, don't do it. Find your missing bass some other way.

Posted on Mar 12, 2011

  • 1 Answer

SOURCE: Hi I have a marantz

I just bought one today for 25 quid with no remote and found that the volume control on my cheap multi remote works from default setting, it's the same as my arcam amp. Philips cd remotes might work too I found one in a cash converters for a quid with a volume control.

Posted on Mar 12, 2011

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I have a Sony STR-K502P home receiver. While watching a program the other day the center channel stopped working. Prior to that I had recently noticed a clicking noise like a relay switching off and...


It wouldn't be your output transistors. If they go bad they blow the fuse. Sounds like a speaker relay problem. Have you checked the solder connections on the relays? They sometimes break down. If that doesn't help, I would replace the relay. Center channel goes through RY501. Sony p/n: 1-755-170-11.

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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.

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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

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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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The vertical circuit needs to be checked. It could be the vertical output needs to br resolderd or you could possibly have a bad capacitor. if you need more assistance let me know.

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Your vertical output IC may be needing to be resolderd or replaced. Try resoldering it first.

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