Troubleshooting - Yamaha EMX5000-12 Owner's Manual

Troubleshooting

The following table describes the possible malfunctions of this device, and the appropriate actions to be taken in
each case.
Problem
The POWER
indicator is
dark.
Sound is no
longer out-
put from the
speakers.
The POWER
indicator is lit.
Other
Powered Mixer Q&A
Q: The built-in effect is not effective.
Q: The monitoring sound from the speakers is not power-
ful enough relative to the level of the input sound.
Q: The signal is sent from the EFFECT SEND jack to the
connected effect processor. Then the effect sound is
returned to the ST SUB IN jack. However, no signal is
input to the mixer.
Q: An external powered speaker is connected to the AUX
SEND jack.
However, the signal is not sent to the speaker even
when the AUX fader in the MASTER CONTROL section
is raised.
Q: Can the INPUT A jack and the INPUT B jack be used at
the same time?
Q: Can a single speaker be connected to the mixer?
Cause
The load on this device was too great, and
the protection circuit for the power unit
has operated. Possible reasons for the exces-
sive load are an excessive input to the device,
or inappropriate ventilation.
The load on the amplifier of this device was
too great, and the protection circuit for the
amplifier has operated. Possible reasons for
the excessive load are an excessive level set-
ting in the channel control section or main
section, insufficient ventilation, or insuffi-
cient load impedance of the connected
speakers.
Connections between devices have come
loose.
Other
Please wait. When the device cools off, normal operation
will resume automatically. However, please check the
following two points to prevent the problem from recur-
ring.
If the input to this device is greater than the nominal
level, lower the input to the nominal level. If the device
is not ventilated sufficiently, refer to the cautions given at
the beginning of this manual and take appropriate mea-
sures to insure adequate ventilation.
Please wait. When the device cools off, normal operation
will resume automatically. However, please check the
following 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
cautions 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 chapter on connections (page 19–20) and change
the connections so that the impedance is correct.
Inspect the connections, and correct any faulty connec-
tions.
The device may have malfunctioned. Please contact your
dealer.
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
fader in the DIGITAL EFFECT section.
A: The equalizer LOW control for each channel may be set
to negative values.
A: The ST or AUX control in the STEREO SUB INPUT
section may not be rotated to right.
A: The AUX controls for input channels may not have been
adjusted.
A: You cannot use the INPUT A jack and the INPUT B jack
for the same channel at the same time.
A: Yes. Use a speaker with an impedance of 4-8 ohms.
EMX5000-20/EMX5000-12—Owner's Manual
29
Troubleshooting
Action