Question about Yamaha RX-V757 Receiver

14 Answers

No Sound We've had this receiver for just over two years with no problems. This weekend, without warning and for no apparent reason, the sound just quit - totally. I haven't made any changes in wires or speakers. None of the speakers are working and I even tried disconnecting all of the speakers and reconnceting some different ones with new cables ...all to no avail. The sound does not work on any input.

Posted by on

  • ruckus57 Jun 28, 2008

    I've tried everything recommended in the owner's manual; still no results. I tried disconnecting and unplugging everything, leaving it overnight, and then reconnecting one element and speaker at a time to make sure it isn't a short in the speaker wires. Still no results.

    I'm not getting any sound from the headphones either. I don't want to make matters worse by messing with circuitry and other internal components since I obviously don't have a clue what I'm doing, so I took it in to a repair shop today.

    Thanks for all the suggestions.


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14 Answers

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Greetings,

Good decision.

Keep us posted and thank you for using our service.
FixYa for all your troubleshooting needs.

Posted on Jun 29, 2008

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  • 161 Answers

Trying numerous solutions will be too costly and take a lot longer to fix. Have a technician nearby your area, preferably ones of the manufacturer to have a free assessment of the actual cause of the problem. From there you'll be able to buy and replace whatever is damaged.

Posted on Jun 29, 2008

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  • 758 Answers

Have you tried the speaker on a different system?

Posted on Jun 29, 2008

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There may be some problem in the ports or if some capacitor burned out near the ports inside in the board also it doesnt work .....

just have a check with this ....

Posted on Jun 28, 2008

  • 2 more comments 
  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 28, 2008

    if you are good at opening then just open it ....
    and just have a smooth look on the board is there is any capacitor burnt near the ports ....
    (some times the capacitor looks in the good condition if it is burnt out also )
    this can be resolved by checking the capacitors near the ports using the instrument needed for it ...


  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 28, 2008

    as i think it is a clear cut case of burnt capacitor ...

    capacitors are responsible for the correctly power supply to the port for the proper functioning ....

    i suggest to you to just power on and take a tester & keep it in the ports & check the power supply to the ports ....




  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 28, 2008

    any doubts reply me ....



  • Dileep Keshavanarayana
    Dileep Keshavanarayana Jun 29, 2008

    rate the solution as per your satisfaction

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Tech 48 has it correct. The most probable problem is shorted output transistors. This is common for older receivers and is not an abuse indication at all. The unit is in protect mode and will emit no sound until the problem is resolved. Look for the output transistors attached to the heatsink. If you can solder, try unsoldering all of the pins in these transistors. Then turn on the receiver and measure the voltages on the three pads where the transistors were connected. Post the readings here and we'll continue on to the next step. If you feel uncomfortable with this action, expect a parts cost in the $15-$40 range depending upon whether 1 or 2 channels are effected. Add in the local labor rate for the total repair cost.

Dan

Posted on Jun 28, 2008

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Have you tried all inputs to see if any work? Also, how loud were you listening to it when it went or do you have a habit to crank it up? If so, you may have fried the board. Please let me know how this is used, thanks

Posted on Jun 27, 2008

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Make sure your tape monitor switch is not engaged. If it is, you will see a small display of "tape monitor" lit up or the tape monitor switch will have a red led lit up for it.

This is a very common mistake people make by accident.

If the problem is inside the receiver, there are just too many different things that can cause this. Anything from a shorted output channel, to a bad switching IC, or a bad component on the DSP board. All of the audio goes into and out of the DSP board. You will not find a speaker fuse inside this unit, only a power supply fuse and if the unit turns on, that fuse is good.

I have repaired hundreds of receivers over the last 17 + years and can say with certainty that these receivers are worth fixing most of the time. If the DSP board must be replaced and not repaired, then it may be too costly

The Yamaha receivers are very good one's, not some cheap-o brand. I am sure you realize this since you own it.

I can help you further if you would like, just address the post you make to me if you is.

Thanks and good luck with this,

Dave


Posted on Jun 27, 2008

  • 2 more comments 
  • Dave DeGain
    Dave DeGain Jun 27, 2008

    Sorry the last word is supposed to be "do"....a type-o

  • Dave DeGain
    Dave DeGain Jun 27, 2008

    I made a mistake.

    some of these receivers have a pair of fuses that supply the voltage rails of the outputs. Sometimes they are on the power transformer board and other times on the main board where the power transformer wires go to the main amp board. Just make sure if you decide to open this unit up to turn off the power and unplug it from the wall outlet. It can be dangerous poking around inside. Better to be safe than sorry.


  • Dave DeGain
    Dave DeGain Jun 28, 2008

    Do you have any more information regarding anything you may have done to get this working?

    It is vital for the experts to know how your progress is going in order to help you further.

    Was the "Tape Monitor" switch engaged? It will cause the unit to have no output unless a tape recorder is connected and is in the record mode. The display will look normal, you can switch sources and everything seems like it is OK, but you would only hear sound if the volume is turned all the way up, and then the sound would be very faint (barely audible). It is a sure sign that the monitor is engaged. Some receivers have a "Monitor" button, and not a "Tape Monitor" button, but they are both the same thing. If you have a tape deck connected, one way to see if that is the problem is to put a recordable tape in it and press the record button. If your audio returns while recording the monitor button is engaged. Make sure you have a source selected like the tuner tuned to a station or the CD selected and a CD playing.

    One other thing to look for is that the "A" or "B" speaker selection switches are properly engaged. If you have speakers only on the "A" speaker jacks, some receivers will have no audio if the "A" and the "B" speakers are both selected. Just make sure that whichever speaker jacks you have speakers connected to, that only that speaker button is selected.

    Thanks, and any updates would be appreciated, and be sure to accept what ever solution was the most helpful for you.

    Dave


  • Dave DeGain
    Dave DeGain Jun 29, 2008

    Since you are not getting anything from the headphones and you have checked for the monitor switch, you might have a digital board problem, all of the audio goes into and out of the digital board. It may even have the electronic volume control IC for the pre-amp on it. This could also be a problem on the input board with a switching IC. In any case, letting a professional technician look at it is the best way to go now. I hope you would be kind enough to let me know just what that problem was after they fix it. I would really appreciate that, I don't really care about getting rated for this, just curious about the actual problem.

    Good luck with it,



    Dave

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  • 58 Answers

Hello, this problem may be becouse you ampifier has damaged so try to change it

Posted on Jun 27, 2008

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Its the problem on the main board of the reciever. just open n check out for any bulged up capacitors that is shorting the track.if u hve a technical knowledge n if u r familiar with soldering u can replace those bulged capacitors.it will work fine for sure.

feel free 4 further assistance .rate the particular experts solution as fixya that helps u understand n solve ur problem.

Posted on Jun 23, 2008

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There could be quite a few reasons for this. One is that the amplifier has blown. Have you tried the earphone jack for sound?

Does the unit turn on and act as though it is playing OK? If so then I would suspect the amp. These receivers are very digital in nature so if it thinks it's playing then the logic circuitry is most likely OK. There may be a fuse inside for the speaker outputs to protect the receiver. You may want to open the unit and check and test any fuses you might see. Also look for any burnt, broken, loose, or bulging components. If you see anything suspicious you can try to replace it or have someone do it for you.


I would unplug everything first and start fresh. Leave it unplugged over night in hopes that any protection circuitry resets itself. Plug in 1 speaker and test the FM tuner. Then continue adding speakers and inputs one at a time, turning off the unit every time, until it stops producing sound. You may discover that one of your speakers are shorted out and causing your problem, or that a specific input or speaker output is not working. This may help locate the faulty component.

Posted on Jun 23, 2008

  • Dean Joly
    Dean Joly Jun 27, 2008

    Could you update us on the things you've tried. That way we might be able to further assist you. Thanks.

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Try checking the following:

The input mode is set to DTS or
ANALOG.
Select AUTO.
No appropriate input source has been
selected.
Select an appropriate input source with INPUT,
MULTI CH INPUT (or MULTI CH IN on the remote
control) or the input selector buttons.
Speaker connections are not secure. Secure the connections.
The front speakers to be used have not
been selected properly.
Select the front speakers with SPEAKERS A and/or
B.
The volume is turned down. Turn up the volume. —
The sound is muted. Press MUTE or any operation button of this unit to
resume audio output, then adjust the volume.
The input mode is set to ANALOG while
playing a source encoded with a DTS
signal.
Set the input mode to AUTO or DTS.

Hope that helps.........

Posted on Jun 23, 2008

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Hi,

I suggest you to first replace the speakers, if you still face the problem then your reciver/amp has a problem in it. Sorry to say bud, but in these cases it is nor worth having these types of recivers repaired. it would cost about the same if not more to repair it as it would to replace it now a days.


Posted on Jun 23, 2008

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  • 848 Answers

The internal amplifier might have been damaged in the sense not working properly so only you are having this problem replace it

Posted on Jun 23, 2008

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