Yamaha EMX62M Owner's Manual download pdf (Page 20)

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.

The built-in effect is not effective.

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.

The monitoring sound from the speakers is not powerful

enough relative to the level of the input sound.

The equalizer LOW control for each channel may be set to

negative values.

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.

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.

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.

The AUX IN control in the MAIN section may not be rotated to

right.

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.

The MONITOR controls for input channels may not have been

adjusted.

Can the Low-Z jack and the Hi-Z jack be used at the

same time?

You cannot use the Low-Z jack and the Hi-Z jack for the same

channel at the same time.

Can a single speaker be connected to the mixer?

Yes. Use a speaker with an impedance of 4-8 ohms.

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Yamaha EMX62M Owner's Manual Page 20

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