Yamaha AP-U70 Owner's Manual - Page 44

APPENDIX APPENDIX Troubleshooting Refer to the chart below if this unit does not function properly. If the problem you are experiencing is not listed below or if the instructions given below do not help, disconnect the power cord and contact your authorized YAMAHA dealer or service center. Problem Cause Remedy The unit cannot be turned on though the power switch is pressed. The power cord is not plugged in or is not completely inserted. Firmly plug in the power cord. No sound. This unit is in the standby mode. Turn on this unit by pressing the power switch on the front panel or the POWER key on the remote control. Incorrect output cord connections. Connect the cords properly. If the problem persists, the cords may be defective. The muting function of this unit is on. Turn off the muting by pressing the MUTE key. Headphones are connected to the headphone jack of this unit. Disconnect the headphones from the headphone jack to output sound from the speakers. The volume is set to minimum. Increase the volume. The playback source is not selected by the input selector keys. Select the playback source using the input selector keys. When PC is selected as the input source, check that the digital or analog input is correctly selected. The power of the equipment selected as the input source is off. Turn on the equipment. No surround effect. The DSP is off. Turn on the DSP. When making a recording from an audio CD to an MD, CD-R, etc., all tracks are recorded as one track. A DSP sound field program is selected or the built-in graphic equalizer is used. Turn off the DSP and the graphic equalizer. Program sources on an MD, CD-R, etc. which is a copy of an audio CD, cannot be recorded on the computer via the USB connection. You cannot make a recording from a CD-R, MD, etc. which is a copy of an audio CD, to another CD-R, MD, etc. via the USB connection or the digital terminal connection. Record the signals of such an MD, CD-R, etc. on the computer by sending the signals via an analog connection. Signals inputted to your computer via the USB connection cannot be recorded on the computer. Incorrect setting of the recording device on the computer. Correctly set the recording device on the computer. [Refer to "Recording on computer (via the USB connection") on page 12.] No effect of Dolby Digital or DTS though the sound field program "VDD" is selected. The playback source is encoded with neither Dolby Digital nor DTS. Use a source encoded with Dolby Digital or DTS. Different sounds are heard together. Sound from the computer via the USB connection may be mixed with sound from other sources because the "USB Mix" setting is set to "ON" with the Application Software. Set the "USB Mix" setting to "OFF" if you do not want to hear mixed sounds. Left and right volume levels are different. The level balance is not set to center on the "Balance" setting on the VIRTUAL panel in the Application Software. Set the level balance to center. APPENDIX English E-19