Yamaha DSP-E492 Owner's Manual - Page 27
Troubleshooting - amp
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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. Amplifier SYMPTOM The unit fails to turn on when the POWER switch is pressed, or turns off suddenly soon after the power is turned on. No sound or no picture. The sound suddenly goes off. Only one side speaker outputs the sound. Sound "hums". The volume level cannot be increased, or sound is distorted. No sound from the main speakers. No sound from the rear speakers. No sound from the center speaker. The remote control transmitter does not work. The sound is degraded when listening with the headphones connected to the compact disc player or cassette deck that are connected with this unit. Noise from nearby TV or tuner. CAUSE Power cord is not plugged in or is not completely inserted. The IMPEDANCE SELECTOR switch on the rear panel is not set to the left or right end exactly. Incorrect output cord connections. Appropriate input source is not selected. The PROCESSOR SELECTOR switch on the front panel is set to the "EXTERNAL" position. Speaker connections are not secure. The protection circuit has been activated because of short circuit etc. Incorrect cord connections. Incorrect cord connections. The power to the component connected to the REC OUT terminals of this unit is off. The volume is adjusted to minimum on the external amplifier driving the main speakers. Incorrect cord connections. The sound output level to the rear speakers is set to 0. The monaural sound source is played in DOLBY PRO LOGIC or DOLBY PRO LOGIC ENHANCED mode. The sound output level to the center speaker is set to 0. The center channel mode is in PHANTOM mode. Incorrect sound field program selection. 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. The power to this unit is off. REMEDY Firmly plug in the power cord. Set the switch to the left or right end exactly. Connect the cords properly. If the problem persists, the cords may be defective. Select an appropriate input source with the input selector buttons. When you will not use signals input to the INPUT (from AMP/RECEIVER PREOUT) terminals on the rear panel, make sure to set the PROCESSOR SELECTOR switch to the "INTERNAL" position. Secure the connections. Turning the unit off and then on will reset the protection circuit. Connect the cords properly. If the problem persists, the cords may be defective. Firmly connect the audio plugs. If the problem persists, the cords may be defective. Turn the power to the component on. Increase the volume on the external amplifier. Connect the cords properly. If the problem persists, the cords may be defective. Raise the sound output level to the rear speakers. Select another program suitable for the monaural sound source. Raise the sound output level to the center speaker. Select NORMAL or WIDE. Select the appropriate program. Change the position of the main unit. Replace the batteries with new ones. Turn the power to this unit on. This unit is too close to the affected equipment. Move the unit further away from the affected equipment. Remote control transmitter Others 27