Yamaha RX-777 Owner's Manual - Page 20
TROUBLESHOOTING, and contact your authorized YAMAHA dealer or service center for help. - stereo amplifier
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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 PROBLEM column, disconnect the power cord and contact your authorized YAMAHA dealer or service center for help. PROBLEM CAUSE REMEDY Amplifier The unit fails to turn on when the STANDBY/ ON switch is pressed. Power cord is not plugged in or is not completely Firmly plug in the power cord. inserted. It happens that this unit does not work normally. There is an influence of strong external noise (lightning, excessive static electricity, etc.) or a misoperation on this unit while using this unit. Turn this unit into the standby mode and disconnect the AC power cord from the AC outlet. After about 30 seconds pass, connect the power and operate this unit again. No sound or no picture. Incorrect output cord connections. Connect the cords properly. If the problem persists, the cords may be defective. Appropriate input source is not selected. Select an appropriate input source with the INPUT selector. The SPEAKERS switches are not set properly. Set the SPEAKERS switch which corresponds to the speakers to be used to the ON position. Speaker connections are not secure. Secure the connections. The sound suddenly goes off. The protection circuit has been activated because of Check the IMPEDANCE SELECTOR switch is set short circuit etc. to the appropriate position and then turn the unit back on. Check the speaker wires are not touching each other and then turn the unit back on. The SLEEP timer has functioned. Turn on the power, and play the source again. Only one side speaker outputs the sound. Incorrect setting of the BALANCE control. Adjust it to the appropriate position. Incorrect cord connections. Connect the cords properly. If the problem persists, the cords may be defective. Sound "hums". Incorrect cord connections. Firmly connect the audio plugs. If the problem persists, the cords may be defective. No connection from the turntable to the GND terminal. Make the GND connection between the turntable and this unit. The volume level is low while playing a record. The record is being played on a turntable with an The player should be connected to the unit through MC cartridge. the MC head amplifier. The volume level cannot be increased, or sound The component connected to the REC or ZONE 2 Turn the power to the component on. is distorted. output terminals of this unit is turned off. Sound level is low. The LOUDNESS control is functioning. Set the LOUDNESS control to the 0 position. The INPUT selector will not function though it The CD DIRECT AMP switch is ON. is turned. Switch off the CD DIRECT AMP switch. Using the BASS, TREBLE, BALANCE and LOUDNESS controls does not affect the tone. The CD DIRECT AMP or PURE DIRECT switch is ON. The CD DIRECT AMP and PURE DIRECT switches must be switched OFF to use those controls. FM FM stereo reception is noisy. 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. Check the antenna connections. Try using a high quality directional FM antenna. Set the TUNING MODE button to the manual tuning mode. There is distortion and clear reception cannot be There is multipath interference. obtained even with a good FM antenna. Adjust antenna placement to eliminate multipath interference. A desired station cannot be tuned in with the automatic tuning method. The station is too weak. Use the manual tuning method. Use a high quality directional FM antenna. Previously preset stations can no longer be tuned in. This unit has been unplugged for a long period. Repeat the presetting procedure. AM A desired station cannot be tuned in with the automatic tuning method. Weak signal or loose antenna connections. Tighten the AM loop antenna connections and rotate it for best reception. Use the manual tuning method. There are continuous crackling and hissing noises. Noises result from ligtning, fluorescent lamps, Use an outdoor antenna and a ground wire. This motors, thermostats and other electrical equipment. will help somewhat but it is difficult to eliminate all the noises. There are buzzing and whining noises (especially A television set is being used nearby. in the evening). Relocate this unit away from the TV. E-16