Yamaha RX-V640RDS User Manual (English)

Questions and Answers:

A
alexandervelazquezAug 27, 2025
Why is there no sound from the center speaker on my Yamaha Stereo Receiver?
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  johntuckerAug 27, 2025
  If you're not getting any sound from the center speaker of your Yamaha Stereo Receiver, check the following: * Ensure the output level of the center speaker is not set to minimum; raise the level if needed. * Verify that “SOUND 1A CENTER” on the set menu is not set to NON; select the appropriate mode for your center speaker. * If one of the Hi-Fi DSP programs (1 to 4) has been selected (except for 6ch Stereo), select another DSP program.
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Henry RobertsAug 27, 2025
Why is there no sound from the subwoofer connected to my Yamaha Stereo Receiver?
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  Gina AndersonAug 27, 2025
  If you're not getting any sound from the subwoofer connected to your Yamaha Stereo Receiver, here's what to check: * If “SOUND 1E BASS” on the set menu is set to MAIN when a Dolby Digital or DTS signal is being played, select SWFR or BOTH. * If “SOUND 1E BASS” on the set menu is set to SWFR or MAIN when a 2-channel source is being played, select BOTH.
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Michael ShermanAug 28, 2025
Why is there no sound from the effect speakers on my Yamaha Stereo Receiver?
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  Joan GarciaAug 28, 2025
  If you're not hearing any sound from the effect speakers on your Yamaha Stereo Receiver, try the following: * Make sure the sound effect is switched on by pressing STEREO/EFFECT. * If you're using a Dolby Surround, Dolby Digital, or DTS decoding DSP program with material not encoded with these formats, select another DSP program.
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Cynthia KleinAug 28, 2025
Why is there no sound from the rear speakers on my Yamaha Stereo Receiver?
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  Stephanie RodriguezAug 29, 2025
  If you're not getting sound from the rear speakers on your Yamaha Stereo Receiver, check these settings: * Ensure the output level of the rear speakers is not set to minimum; raise the output level if needed. * If you're playing a monaural source with program 9, select another DSP program.
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ahunterAug 29, 2025
Why is there no sound from the rear center speaker on my Yamaha Stereo Receiver?
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  Keith SampsonAug 29, 2025
  If you're not getting any sound from the rear center speaker on your Yamaha Stereo Receiver, check the following: * Ensure that “SOUND 1C REAR LR” or “SOUND 1D REAR CT” on the set menu is set to LRG or SML. * Verify that the Dolby Digital EX or the DTS-ES decoder is switched on by pressing 6.1/5.1 on the remote control.
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Susan HarmonAug 30, 2025
What to do if Yamaha Receiver fails to turn on?
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  Veronica RodriguezAug 30, 2025
  If your Yamaha Receiver fails to turn on, consider the following: * Ensure the power cord is firmly connected to the outlet. * Verify the IMPEDANCE SELECTOR switch on the rear panel is fully set to either the left or right position. * Check speaker wire connections for security and ensure no wires are touching other connections, as the protection circuitry might be activated. * If the unit experienced a strong electric shock, put it in standby mode, disconnect the power cord, wait 30 seconds, and then plug it back in.
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Anita RamirezAug 31, 2025
What to do if Yamaha Receiver sound suddenly goes off?
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  Amanda MartinezAug 31, 2025
  If the sound on your Yamaha Receiver suddenly cuts off: * Check that the IMPEDANCE SELECTOR switch is set correctly, as the protection circuit may have been activated due to a short circuit. * If the sleep timer is on, turn the power back on and restart the source. * Ensure the unit is not muted by pressing the MUTE button or any other operation button to cancel mute and adjust the volume.
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Courtney EdwardsAug 31, 2025
What to do if Yamaha Receiver only plays sound on one side?
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  Gabrielle TranAug 31, 2025
  If you're only hearing sound from one speaker on your Yamaha Receiver, the cable connections may be incorrect. Ensure that the cables are properly connected. If the problem continues, the cables may be defective and need replacement.
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logan46Sep 1, 2025
Why Yamaha Receiver has no sound from effect speakers?
- R
  Richard HarrisSep 1, 2025
  If there is no sound from the effect speakers on your Yamaha Receiver: * Make sure the sound effect is turned on by pressing STEREO/EFFECT. * If you're using a Dolby Surround, Dolby Digital, or DTS decoding DSP program with material not encoded in those formats, select another DSP program.
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Stephanie WilliamsSep 2, 2025
Why Yamaha Receiver has no sound from the center speaker?
- S
  Sherri ThompsonSep 2, 2025
  If there's no sound coming from the center speaker of your Yamaha Receiver: * Check if the output level of the center speaker is set to minimum and raise it. * Ensure that “SOUND 1A CENTER” on the set menu is not set to NON; select the appropriate mode for your center speaker. * If you've selected one of the Hi-Fi DSP programs (1 to 4, except for 6ch Stereo), try selecting another DSP program.

Yamaha RX-V640RDS Specifications

General

Input Sensitivity	200 mV
Signal-to-Noise Ratio	100 dB
Type	AV Receiver
Digital inputs	2 x Optical, 1 x Coaxial
Analog Inputs	5 x RCA
Frequency Response	10 Hz - 100 kHz (+0, -3 dB)
Total Harmonic Distortion	0.06%
Damping factor	100
Speaker load impedance	8 ohms
Video Connections	Composite, S-Video
Tuner Section	FM/AM
Headphone Output	1