Yamaha EMX66M Owner's Manual - Page 26

24 Troubleshooting Troubleshooting The following table describes the possible malfunctions of this device, 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. Please wait. When the device cools off, normal operation will resume automatically. However, please check the following three points to prevent The load on the amplifier of this device the problem from recurring. was too great, and the protection cir- • If the level setting is excessive, lower it to the cuit for the amplifier has operated. nominal level. You can refer to the peak level indi- Possible reasons for the excessive load cators of the main section when doing so. are an excessive level setting in the • If the device is not ventilated sufficiently, refer to channel control section or main section, the cautions given at the beginning of this manual insufficient ventilation, or insufficient and take appropriate measures to insure ade- load impedance of the connected speak- quate ventilation. ers. • If the load impedance (including a short) is too low, refer to the chapter on connections (page 16) and change the connections so that the imped- ance 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. 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 EFFECT RTN control in the MAIN section. 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 Ω. EMX66M-Owner's Manual