Question about Sony Audio Players & Recorders

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I have a Sony Dolby Digital receiver str-db940 fuse blew so I put in new one and it blew also right away, not sure what to do next

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  • Sony Master
  • 1,054 Answers

Most likely problem is you have shorted output transistors in one of the amp channels. These need to be replaced before the unit will operate correctly.

Posted on Mar 14, 2016

  • Armando Hernandez Oct 17, 2019

    Try plugging it to a cord with a reset button with multiple outlets to prevent a power surge.That will keep it from burning up the fuse.

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  • Sony Master
  • 2,942 Answers

It's time to take it to an electronics tech. Something inside it has died, blowing the fuse. This isn't a do-it-yourself project.

Posted on Mar 10, 2016

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6 Suggested Answers

6ya6ya

6ya staff

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SOURCE:

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Posted on Jan 02, 2017

Anonymous

  • 93 Answers

SOURCE: yamaha htr-5240 dolby digital problem

Is there switch from dolby pro logic/ surround / or analog/ digital?

Posted on Oct 01, 2007

Anonymous

SOURCE: Sony Receiver STR-D550Z

I would open it up and look for large capacitors that have a bulged top, I've fixed several receivers that were buzzing or had static by replacing a couple of cheap capacitors that had blown.

Posted on Sep 17, 2008

Inno Laur

  • 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

Anonymous

  • 1 Answer

SOURCE: I have a Sony STR-D565 Receiver. I bought new

I resently hooked up my sony std d 565 reciever for 5.1 speakers and I keep hearing beeping, what is wrong?

Posted on May 01, 2009

smarthome2

Frank Fulton

  • 1114 Answers

SOURCE: Sony STR-GX800ES receiver "protector" blinking - no sound

The most common problem found on FixYa for Audio Video2_bing.gif Receiver's is:

My receiver say's "Protect" or turns on then off. What's wrong? Seven times out of ten it is a shorted speaker or speaker wire. To determine your exact problem, the first step is to disconnect all speaker wires "at your receiver" Next: Turn the receiver back on. If your receiver still says "protect" or turns off, it needs to be serviced. If your receiver stays on; reconnect your speakers one at a time and power back up after each speaker. You may find that after reconnecting all speaker wires it works! Most commonly the small braids of wire from the + to the - have touched and have caused the problem. In some instances, you noticed the problem only when turning the volume up. either way, make sure the exposed wires to your receiver are no longer than 1/2" long and are completely under the screw down terminal or slide in. When you've found the wire or speaker with the problem, your receiver will go back into "protect" At this point, disconnect the wire from the speaker at the speaker that may be causing the problem then test again.* Note* Make sure speaker wires do Not touch each other as this Will cause a short! If you turn the receiver back on and it stays on, you now know the problem is in your speaker itself. To test your speaker, you will need a multimeter. Set it to ohms resistance and touch the speaker terminals, if there is a short internally the meter will read "1......" If it's an analog meter, it will peg to the right. There's your problem. Now, within any speaker there are quite a few possibilities as to what could be causing the problem. Most common is a blown coil and the speaker needs to be replaced. Some speakers have internal crossovers (usually floor standing speakers) and may have a shorted or burnt board (usually very visible brown burn marks on the board) and can possibly be repaired if your handy with a soldering iron. Now, if you disconnect the speaker wire at the speaker and it still says "protect" Check your wire for the obvious cut or nail thru the wire if possible. If your system has wiring that runs behind walls, you may need to use your meter again. Disconnect the wire at both ends, keep the ends separated, put your meter on ohms resistance and touch probes to the + and - wires at one side. If the meter pegs to the right or reads "1...." the wire is shorted and needs to be replaced or repaired at the short. Hope this helps.

Posted on Jun 13, 2010

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2 Answers

Why is center channel dead?


Sony STR-K840P Sound center speaker - Questions - Fixya

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... sound from center channel during viewing, or during speaker level test- all other speakers emit tone, but center is dead. I have optical digital cable and hdmi ...

Sony STR-K840P Sound center channel - Questions - Fixya

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Sony STR-DB940 pulled back from the brink - Page 2 - Badcaps ...

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Jan 01, 2016 | Sony STR-K840P

1 Answer

Hiya there. i have a sony str-db 940 amp thats totaly dead i have checked all the internal fuses and the external one i have also checked the mains cable and everything is fine. i have completely...


hello, try testing the diodes first make sure you desolder 1 end and lift away from the board this will make sure you get a proper reading on the multimeter if theses ok check transistor next take them out of the board if ok then resistor same again out of the board . when testing capacitors make sure there not bulged it would be better if you can get an esr meter for testing capacitors good luck

regards
shaun

Dec 05, 2010 | Sony STR-DB940 Receiver

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

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

1 Answer

Sony STR-DE545 receiver


You should have access to receiver's format from remote or front panel. If the unit was moved around a lot and for a long period, the micro-processor may have locked due to ambient static electricity. Try unplugging unit for seversl hours, then re-try

Aug 19, 2007 | Sony STR-DE545 Receiver

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