Why can't a source be recorded by a digital recording component connected to the DIGITAL OUTPUT jack of my Yamaha Receiver?
If a source cannot be recorded by a digital recording component connected to the DIGITAL OUTPUT jack of your Yamaha Receiver, ensure that there is a source component connected to the DIGITAL INPUT jacks of this unit.
Why is there no sound coming from my Yamaha RX-V740?
If you're not getting any sound from your Yamaha Receiver, check these potential causes: * Ensure all input and output cables are correctly connected and not defective. * Select the appropriate input source using INPUT or 6CH INPUT (or the input selector buttons). * Make sure the speaker connections are secure. * Select the main speakers with SPEAKERS A and/or B. * Increase the volume and ensure the unit is not muted by pressing MUTE or any operation buttons. * Confirm that the source component is playing signals that the unit can reproduce.
What to do if the remote control of my Yamaha RX-V740 Receiver does not work?
If the remote control for your Yamaha Receiver isn't working, try these solutions: * Ensure you are within a 6 m (20 feet) range and within 30 degrees off-axis from the front panel. * Replace all the batteries with new ones. * Set the manufacture code correctly and try setting another code of the same manufacturer.
Why does my Yamaha RX-V740 Receiver display “CHECK SP WIRES”?
If your Yamaha Receiver displays “CHECK SP WIRES” on the front panel, it indicates that the speaker cables are short-circuited. Ensure all speaker cables are connected correctly.
What to do if the sound suddenly goes off on my Yamaha RX-V740?
If the sound suddenly cuts off on your Yamaha Receiver, here's what you can check: * The protection circuit may have been activated due to a short circuit. Verify the IMPEDANCE SELECTOR switch is in the correct position and then restart the unit. * The sleep timer might have turned the unit off. Turn the power back on and resume playing the source. * The unit might be muted. Press MUTE or any operation buttons to cancel mute and adjust the volume.
Why is there no sound from the rear center speaker on my Yamaha Receiver?
If there is no sound from the rear center speaker on your Yamaha 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, not NON. * Verify that the Dolby Digital EX or the DTS-ES decoder is switched on by pressing 6.1/5.1 on the remote control.
Why is the volume level low while playing a record on my Yamaha Receiver?
If the volume level is low when playing a record on your Yamaha Receiver, and you are using a turntable with an MC cartridge, the turntable should be connected through an MC-head amplifier.
Why can't I increase the volume level, or the sound is distorted on Yamaha RX-V740 Receiver?
If the volume level cannot be increased, or the sound is distorted on your Yamaha Receiver, it could be that the component connected to the OUT (REC) jacks of this unit is turned off. Turn on the power to that component.
Why is there no sound from the effect speakers of my Yamaha RX-V740?
If you're not hearing any sound from the effect speakers on your Yamaha Receiver, check the following: * Ensure the sound effect is turned on by pressing STEREO/EFFECT. * If using a Dolby Surround, Dolby Digital, or DTS decoding DSP program, make sure the material is encoded with Dolby Surround, Dolby Digital, or DTS. If not, select another DSP program.
What to do if my Yamaha RX-V740 Receiver is making a humming sound?
If you hear a humming sound from your Yamaha Receiver, try these solutions: * Ensure all audio plugs are firmly connected. If the problem continues, the cables may be defective. * If using a turntable, connect its grounding cord to the GND terminal of the unit.
Procedure for verifying insulation of exposed surfaces in 120V models after servicing.
Detailed technical specifications for the audio performance of the amplifier section.
Configuration for assigning input signals to specific terminals and functions.
Selection of input signal processing modes, such as Auto Last or DSP Through.
Labeled diagram identifying the location of internal circuit boards and components.
Procedure to check and adjust idling current for the main amplifier board by measuring terminal voltages.
Diagram showing pin assignments for ICs, connectors, and other components.
Detailed pin assignments and functions for the main CPU IC.
Detailed pin assignments and functions for the YSS938 DSP IC.
Component layout and reference designators for the DSP P.C.B. using leaded components.
Component layout and reference designators for the DSP P.C.B. using surface mount devices.
General| Type | AV Receiver |
|---|---|
| Channels | 6.1 |
| Amplifier Type | Discrete |
| Total Harmonic Distortion (THD) | 0.06% |
| Input Sensitivity | 200 mV |
| Input Impedance | 47 kOhms |
| Signal to Noise Ratio | 100 dB |
| Frequency Response | 10 Hz - 100 kHz |
| Digital Inputs | 3 x Optical, 2 x Coaxial |
| Video Connections | Composite, S-Video, Component |
| Video Outputs | Composite, S-Video |
| Surround Sound Modes | Dolby Digital, DTS, Dolby Pro Logic II |
| Power Output | 100 watts per channel (8 ohms, 20 Hz - 20 kHz, 0.06% THD) |
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