Yamaha AX-380 Owner's Manual - Page 11

English 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. SYMPTOM The unit fails to turn on when the POWER switch is pressed. No sound. The sound suddenly goes off. Only one side speaker outputs the sound. There is a lack of bass, and no ambience. Sound "hums". CAUSE Power cord is not plugged in or is not completely inserted. Incorrect output cord connections. Appropriate input source is not selected. Speaker connections are not secure. The protection circuit has activated because of short circuit etc. Incorrect setting of the BALANCE control. Incorrect cord connections. The + and - wires are connected in reverse at the amplifier or speakers. Incorrect cord connections. REMEDY Firmly plug in the power cord. Connect the cords properly. If the problem persists, the cords may be defective. Select an appropriate input source with the input selector buttons. Secure the connections. Turning the unit off and then on will reset the protection circuit. Adjust it to the appropriate position. Connect the cords properly. If the problem persists, the cords may be defective. Connect the speaker wires in the correct phase (+ and -). Firmly connect the audio plugs. If the problem persists, the cords may be defective. Sound level is low. Using the BASS, TREBLE, BALANCE and LOUDNESS controls does not affect the tone of CD input source. The volume level cannot be increased, or sound is distorted. The remote control transmitter does not work. No connection from the turntable to the GND terminal. The LOUDNESS control is functioning. The CD DIRECT switch is ON. The power to the component connected to the REC OUT terminals of this unit is off. 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. Make the GND connection between the turntable and this unit. Set the LOUDNESS control to the FLAT position. The CD DIRECT switch must be switched OFF to use those controls. Turn the power to the component on. Change position of the main unit. Replace the batteries with new ones. 11