Yamaha DXS15 Owner's Manual - Page 12

Troubleshooting Troubleshooting Symptom Possible causes Possible solution Power does not turn on. The power cord is not connected properly. Connect the power cord properly. Power suddenly went off. The protection system has operated, shutting down the power supply. Turn off the power, wait until the amplifier cools down, and then turn on again. No sound. The cable is not connected properly. The LINK MODE switch is set incorrectly. Connect to the INPUT jack properly. If you are using a single DXR, set the LINK MODE switch to MONO. Sound is interrupted suddenly. The protection system has operated, muting the output. Wait until the amplifier cools down. If the device won't automatically reset itself, turn off the power, and then on again. A microphone is directed toward the Keep the speaker away from the area where the speaker. microphone picks up sound. Sound howls (feedback) Sound is amplified too much. Lower the volume of the input device and locate the microphone more closely to the sound source. The setting of the HPF switch is not Set the HPF switch on 120Hz or 100Hz if you get appropriate. feedback in low frequency bands. Each speaker sound differs (if multiple speakers are used) Settings for each speaker differ. • (DXR series) Set the HPF and D-CONTOUR switches of each speaker to the same positions. • (DXS series) Set the POLARITY switch, the LPF switch, and D-XSUB switch of each speaker to the same position. Sound is distorted Input volume is excessive. • Lower the volume of the input device to a point no higher than where the LIMIT indicator lights occasionally. • If sound continues to be distorted even if you turn down the volume to the minimum, set the MIC/LINE switch to the LINE position (if the switch is set to MIC). Output volume is excessive. Use the LEVEL control to lower the output level to a point no higher than where the LIMIT indicator lights occasionally. The microphone volume is too low. The MIC/LINE switch is set to LINE. Set the MIC/LINE switch to the MIC position. Low and high frequency are unbalanced. The output limiter is active. Lower the input level or the output level to a point no higher than where the LIMIT indicator lights occasionally. *If any specific problem should persist, however, please contact your Yamaha dealer. 12 DXR15/DXR12/DXR10/DXR8/DXS15/DXS12 Owner's Manual