Yamaha RX-V670 Owner's Manual - Page 27

TROUBLESHOOTING If the unit fails to operate normally, check the following points to determine whether the fault can be corrected by the simple measures suggested. If it cannot be corrected, or if the fault is not listed in the SYMPTOM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help. Amplifier SYMPTOM The unit fails to turn on when the POWER switch is pressed. No sound or no picture. The sound suddenly goes off. Only one side speaker outputs the sound. Sound "hums". The volume level is low while playing a record. No sound from the rear speakers. No sound from the center speaker. FM stereo reception is noisy. There is distortion and clear reception cannot be obtained even with a good FM antenna. A desired station cannot be tuned in with Auto tuning. A desired station cannot be tuned in with Auto tuning. There are continuous crackling and hissing noises. There are buzzing and whining noises (especially in the evening). The remote control transmitter does not work. The distance or range within which the remote control transmitter can be used decreases. The TRANSMIT/LEARN indicator does not illuminate or flash. Learning cannot be made successfully. The sound is degraded when monitoring is performed by using the headphones connected to the compact disc player or cassette deck which are connected with this unit. CAUSE Power cord is not plugged in or is not completely inserted. Incorrect output cord connections. The MUTING switch is ON. Appropriate input selector is not pressed. The protection circuit has activated because of short circuit etc. Incorrect setting of the BALANCE control. Incorrect cord connection. Incorrect cord connections. No connection from the turntable to the GND terminal. The record is being played on a turntable with an MC cartridge. The sound output level of the rear speakers is 0. The monaural sound source is played in DOLBY PRO LOGIC or ENHANCED mode. The sound output level of the center speaker is 0. The center mode is in PHANTOM mode. Incorrect sound field program selection. No sound field program is selected. Because of the characteristics of FM stereo broadcasts, this is limited to cases where the transmitter is too far away or the antenna input is poor. There is multipath interference. The station is too weak. Weak signal or loose antenna connections. Noises will result from ligtning, fluorescent lamps, motors, thermostats and other electrical equipment. A television set is being used nearby. REMEDY Firmly plug in the power cord. Connect the cords properly. If the problem persists, the cords may be defective. First, turn the volume control to full left. Then, turn the MUTING switch OFF with the remote control transmitter and adjust the volume. Press the appropriate input selector corresponding to the input source. Turning the unit off and then on will reset the protection circuit. Adjust it to the appropriate position. Connect cord properly. If the problem persists, the cables may be defective. Firmly connect the audio plugs. If the problem persists, the cord may be defective. Make the GND connection between the turntable and this unit. The player should be connected to the unit through the MC head amplifier. Turn up the sound output level with the REAR LEVEL key. Select another program suitable for the monaural sound source. Turn up the sound output level with the CENTER LEVEL key. Select NORMAL or WIDE. Select the appropriate program. Check the antenna connections. Try using a multiple element FM antenna. Adjust antenna placement to eliminate multipath interference. Use Manual tuning mode. Use a high quality directional FM antenna. Tighten the AM loop antenna connections and rotate it for best reception. Use Manual tuning mode. Use an outdoor antenna and a ground wire. This will help somewhat but it is difficult to eliminate all noise. Move the television away. Direct sunlight or lighting (of an inverter type of flourescent lamp etc.) is striking the remote control sensor of the main unit. The batteries of this remote control transmitter are too weak. Change the position of the main unit. Replace the batteries with new ones. The batteries of the other remote control transmitter are weak. The distance between the two remote control transmitters is too long or too short. Power cord of this unit is not plugged in. Replace the batteries. Place the remote control transmitters with the proper distance. Plug in the power cord. FM AM Remote control transmitter Others 27