Yamaha EMX62M, Руководство пользователя

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18
Troubleshooting
EMX62M—Owner’s Manual
Troubleshooting
The following table describes the possible malfunctions of this demvice, and the appropriate actions to be
taken in each case.
Powered Mixer Q&A
Problem Cause Action
Sound is no
longer out-
put from the
speakers.
The POWER
indicator is lit.
The load on the amplifier of this
device was too great, and
the protec-
tion circuit for the amplifier has
operated. Possible reasons for the
excessive load are an excessive level
setting in the channel control section
or main section, insufficient ventila-
tion, or insufficient load impedance
of the connected speakers.
Please wait. When the device cools off, normal operation
will resume automatically. However, please check the fol-
lowing three points to prevent the problem from recurring.
• If the level setting is excessive, lower it to the nominal
level. You can refer to the peak level indicators of the
main section when doing so.
• If the device is not ventilated sufficiently, refer to the cau-
tions given at the beginning of this manual and take
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. Inspect the connections, and correct any faulty connec-
tions.
Other The device may have malfunctioned. Please contact your
dealer.
Unbalanced
sound out-
put 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.
Q: The built-in effect is not effective. 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.
Q: The monitoring sound from the speakers is not powerful
enough relative to the level of the input sound. A: The equalizer LOW control for each channel may be set to
negative values.
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. 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.
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. A: The AUX IN control in the MAIN section may not be rotated to
right.
Q: An external powered speaker is connected to the MON-
ITOR-OUTPUT jack.
However, the signal is not sent to the speaker even
when the MASTER control in the MONITOR section is
turned. A: The MONITOR controls for input channels may not have been
adjusted.
Q: Can the Low-Z jack and the Hi-Z jack be used at the
same time? A: You cannot use the Low-Z jack and the Hi-Z jack for the same
channel at the same time.
Q: Can a single speaker be connected to the mixer? A: Yes. Use a speaker with an impedance of 4-8 ohms.