Yamaha A-U671 User Manual (English)

Other manuals for Yamaha A-U671

Questions and Answers:

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Michael ValdezAug 21, 2025
Why is there no sound coming from my Yamaha Amplifier?
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  Andrea Hernandez MDAug 21, 2025
  If there is no sound from your Yamaha Amplifier, first, disconnect any connected headphones. Then, ensure that the mute function is turned off. Check the cable connections and make sure they are properly connected; the cables may be defective. If a component is connected, ensure it is turned on and playing. Select the appropriate input source using the INPUT button. If connected to a PC, ensure the driver is installed. Finally, check that the volume is not set to the minimum and increase it.
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fgeorgeAug 22, 2025
What to do if my Yamaha A-U671 fails to turn on?
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  Nicholas WernerAug 23, 2025
  If your Yamaha Amplifier doesn't turn on, there might be several reasons. First, ensure the power cable is properly connected. Also, check that the speaker wires aren't touching each other, as this could activate the protection circuitry. If the issue persists, there may be a problem with the internal circuitries of the unit; in this case, disconnect the power cable and contact an authorized Yamaha dealer or service center. Finally, verify that you are using speakers with a proper impedance (6 ? or higher).
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Nancy JacksonAug 25, 2025
How to fix a Yamaha A-U671 Amplifier that fails to turn on?
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  Melissa SanchezAug 25, 2025
  If your Yamaha Amplifier fails to turn on, first, ensure the power cable is firmly connected. If that doesn't work, check that the speaker wires are not touching each other. If the issue persists, disconnect the power cable and contact an authorized Yamaha dealer or service center. Also, ensure you are using speakers with a proper impedance of 6 ? or higher.
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Julie LaneAug 26, 2025
What to do if my Yamaha Amplifier turns off suddenly?
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  Ronnie HillAug 26, 2025
  If your Yamaha Amplifier turns off suddenly, first, ensure the speaker wires are not touching each other or shorting out against the rear panel. If the issue continues, try replacing the speaker set. Additionally, the protection circuitry might have been activated due to excessive input or volume; decrease the volume. It could also be due to excessive internal temperature; allow the unit to cool down for about 30 minutes and lower the volume. If the unit was exposed to a strong electric shock, turn it off, disconnect the power cable, and plug it back in after 30 seconds. If none of these steps work, disconnect the power cable and contact an authorized Yamaha dealer or service center.
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Ellen HayesAug 27, 2025
What to do if my Yamaha A-U671 cannot be turned off?
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  Dennis MooreAug 27, 2025
  To turn off your Yamaha Amplifier if it's stuck, press the power button on the front panel for 10 seconds or more to restart the unit. If the problem persists, unplug the power cable, wait about 30 seconds, and then plug it back in.
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Carol BrownAug 31, 2025
How to fix no sound on Yamaha A-U671 Amplifier?
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  Jeffrey BowmanAug 31, 2025
  If you're not getting any sound from your Yamaha Amplifier, here are a few things to check: * Make sure headphones aren't connected, as this will mute the speakers and subwoofer. * Ensure the mute function is turned off. * Verify that all cables are connected properly; if the problem continues, the cables may be defective. * Confirm that the connected component is playing and the volume isn't set to minimum. * Select the correct input source using the INPUT button on the front panel. If you're using a PC, ensure the driver is installed. Finally, increase the volume using the VOLUME control.
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Amanda CunninghamSep 1, 2025
Why can I only hear sound from one speaker on my Yamaha A-U671?
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  Audrey ParrishSep 1, 2025
  If you can only hear sound from one side of your Yamaha Amplifier, check the cable connections to ensure they are properly connected. If the problem persists, the cables may be defective. Also, verify that the BALANCE control is set to the appropriate position.
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jasongloverSep 3, 2025
Why does my Yamaha Amplifier have a lack of bass and no ambience?
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  alexis42Sep 3, 2025
  If you are experiencing a lack of bass and no ambience with your Yamaha Amplifier, especially when a subwoofer is connected, ensure the subwoofer is properly connected. Also, check that the + and – wires are correctly connected at both the amplifier and the speakers. Finally, verify that the BASS control is set to the appropriate position.
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Dustin SimsSep 5, 2025
Why aren't the bass, treble, and balance controls working on my Yamaha Amplifier?
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  shelly34Sep 5, 2025
  If the BASS, TREBLE, and BALANCE controls on your Yamaha Amplifier are not working, it may be because the PURE DIRECT function is turned on; turn it off. If connected to a PC, ensure that the operating system is supported and that the USB cable is properly connected.
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Tiffany HallSep 6, 2025
Why is my Yamaha A-U671 making a humming sound?
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  ysuarezSep 6, 2025
  If you are hearing a humming sound from your Yamaha Amplifier, ensure that the audio plugs are firmly connected. If the problem persists, the cables may be defective.