Yamaha RX-V640 User Manual (English)

Other manuals for Yamaha RX-V640

Service Manual152 pages

Product Bulletin10 pages

Questions and Answers:

T
Tara LambertAug 21, 2025
What to do if my Yamaha RX-V640 fails to turn on?
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  Michele MayAug 21, 2025
  If your Yamaha Receiver fails to turn on or enters standby mode shortly after being powered on, there are several potential causes: * Ensure the power cord is firmly connected to both the receiver and the power outlet. * Verify that the IMPEDANCE SELECTOR switch on the rear panel is fully set to either the left or right position. * Check for activated protection circuitry by ensuring all speaker wire connections are secure and no wires are touching anything other than their respective connections. * If the unit has been exposed to a strong electric shock, set it to standby mode, disconnect the power cord, wait 30 seconds, and then plug it back in.
M
Mario LivingstonAug 25, 2025
Why is my Yamaha Receiver remote control not working?
- A
  aaronmacdonaldAug 25, 2025
  If the remote control for your Yamaha receiver isn't working correctly, consider these potential causes and solutions: * Ensure you are within the remote's operational range, which is a maximum of 6 meters (20 feet) and no more than 30 degrees off-axis from the front panel. * Check if direct sunlight or lighting (especially from inverter-type fluorescent lamps) is interfering with the remote control sensor on the unit. If so, reposition the unit. * Replace all the batteries in the remote control with new ones. * Verify that the manufacture code is correctly set. If not, set the code correctly.
K
Karen ChenAug 26, 2025
What to do if the sound suddenly goes off on my Yamaha RX-V640 Receiver?
- J
  Jacqueline AllenAug 27, 2025
  If the sound from your Yamaha Receiver suddenly cuts off, here's what might be happening and how to address it: * The protection circuit may have been activated due to a short circuit. Check that the IMPEDANCE SELECTOR switch is set to the appropriate position, then turn the unit back on. * The sleep timer may have turned the unit off. Turn the power back on and restart the source. * The sound might be muted. Press the MUTE button or any operation buttons on the unit to cancel the mute function and adjust the volume.
B
Breanna FranklinAug 27, 2025
How to fix Yamaha Receiver when only one speaker works?
- A
  ann06Aug 27, 2025
  If you only hear sound from one speaker connected to your Yamaha Receiver, the issue is likely due to incorrect cable connections. Ensure that all cables are properly connected. If the problem persists, the cables themselves may be defective and need to be replaced.
R
Rhonda CowanAug 29, 2025
Why is there no sound from the subwoofer on my Yamaha Receiver?
- T
  Teresa ThomasAug 29, 2025
  If you're not getting any sound from the subwoofer connected to your Yamaha Receiver, here's what to check: * If you're playing a Dolby Digital or DTS signal, ensure that “SOUND 1E BASS” on the set menu is set to SWFR or BOTH. * If you're playing a 2-channel source, make sure that “SOUND 1E BASS” on the set menu is set to BOTH.
J
Joshua HarrisAug 30, 2025
Why no sound from effect speakers Yamaha Receiver?
- J
  Jeffrey ChristensenAug 31, 2025
  If you are not getting any sound from the effect speakers connected to your Yamaha Receiver, here are a couple of potential reasons: * The sound effect might be switched off. Press the STEREO/EFFECT button to turn it on. * If you're using a Dolby Surround, Dolby Digital, or DTS decoding DSP program with material not encoded in those formats, try selecting another DSP program.
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Nichole AtkinsonSep 1, 2025
Why is there no sound from the center speaker on my Yamaha RX-V640?
- S
  Steven HarveySep 1, 2025
  If you're not hearing any sound from the center speaker of your Yamaha Receiver, here's what you can check: * Ensure that the output level of the center speaker is not set to the minimum. Increase the level if necessary. * Verify 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.
E
Elizabeth JohnsonSep 2, 2025
Why is there no sound from the rear speakers on my Yamaha RX-V640?
- J
  Joy OlsonSep 3, 2025
  If you're not getting any sound from the rear speakers connected to your Yamaha Receiver, here's what to check: * Ensure that the output level of the rear speakers is not set to the minimum. Increase the output level of the rear speakers. * If you are playing a monaural source with program 9, select another DSP program.
D
Debra DoughertySep 4, 2025
Why is there no sound from the rear center speaker on my Yamaha Receiver?
- K
  Katherine HuynhSep 4, 2025
  If you're not hearing any sound from the rear center speaker connected to your Yamaha Receiver, here's what you should check: * Ensure that “SOUND 1C REAR LR” or “SOUND 1D REAR CT” on the set menu is not set to NON. Select LRG or SML instead. * Verify that the Dolby Digital EX or the DTS-ES decoder is switched on. Press 6.1/5.1 on the remote control to activate the decoder.
M
Mario MooreSep 5, 2025
What to do if my Yamaha RX-V640 does not operate properly?
- G
  garciachristineSep 5, 2025
  If your Yamaha Receiver is not operating properly, it's possible that the internal microcomputer has frozen due to an external electric shock (like lightning or excessive static electricity) or a power supply with low voltage. To resolve this, disconnect the AC power cord from the outlet and then plug it back in again after about 30 seconds.

Yamaha RX-V640 Specifications

General

Type	AV Receiver
Channels	6.1
Total Harmonic Distortion	0.06%
Signal-To-Noise Ratio	100 dB
HDMI	No
USB	No
Bluetooth	No
Wi-Fi	No
Frequency Response	10 Hz - 100 kHz
Input Sensitivity	200 mV
Input Impedance	47k ohms
Surround Sound	Dolby Pro Logic II, DTS