Yamaha EMX62M Owner's Manual - Page 20

18 Troubleshooting Troubleshooting The following table describes the possible malfunctions of this demvice, and the appropriate actions to be taken in each case. Problem Cause Action Sound is no longer output from the speakers. The POWER indicator is lit. The load on the amplifier of this Please wait. When the device cools off, normal operation device was too great, and the protec- will resume automatically. However, please check the fol- tion circuit for the amplifier has lowing three points to prevent the problem from recurring. operated. Possible reasons for the • If the level setting is excessive, lower it to the nominal excessive load are an excessive level level. You can refer to the peak level indicators of the setting in the channel control section main section when doing so. or main section, insufficient ventila- • If the device is not ventilated sufficiently, refer to the cau- tion, or insufficient load impedance tions given at the beginning of this manual and take of the connected speakers. appropriate measures to insure adequate ventilation. • If the load impedance (including a short) is too low, refer to the section on rear panel (page 14) and change the connections so that the impedance is correct. Other Connections between devices have come loose. Other Inspect the connections, and correct any faulty connections. The device may have malfunctioned. Please contact your dealer. Unbalanced sound output from the speakers No high range is heard from the speakers. The speaker's protection circuit has been activated due to excessive input signals. Turn off the power to the EMX62M, or lower the volume level. The EMX62M will return to its normal operation in several seconds. Then, turn on the power to the unit or raise the volume level and check to see if the high range is audible. Maintain the level so that the protection circuit will not be activated. Powered Mixer Q&A Q: The built-in effect is not effective. Q: The monitoring sound from the speakers is not powerful enough relative to the level of the input sound. Q: The stereo output from the synthesizer has been routed to the Super Hi-Z jack of channel 6, but the monitoring sound is not stereo. Q: The signal is sent from the EFFECT OUT jack to the connected effect processor. Then the effect sound is returned to the AUX IN jack. However, no signal is input to the mixer. Q: An external powered speaker is connected to the MONITOR-OUTPUT jack. However, the signal is not sent to the speaker even when the MASTER control in the MONITOR section is turned. Q: Can the Low-Z jack and the Hi-Z jack be used at the same time? Q: Can a single speaker be connected to the mixer? A: The ON switch in the DIGITAL EFFECT section may not be turned on. Or, you have adjusted the EFFECT control in the Channel section or the MAIN EFFECT RTN control. A: The equalizer LOW control for each channel may be set to negative values. A: You can use Super Hi-Z (or LINE) 1 and 2 jacks at the same time. However, they are internally routed into a mono channel, and therefore the signals from 1 and 2 jacks are output as mono signal. A: The AUX IN control in the MAIN section may not be rotated to right. A: The MONITOR controls for input channels may not have been adjusted. A: You cannot use the Low-Z jack and the Hi-Z jack for the same channel at the same time. A: Yes. Use a speaker with an impedance of 4-8 ohms. EMX62M-Owner's Manual