Other - Yamaha MG20XU Owner's Manual

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The power does not come
on.
No sound is output.
No sound is output from the
[STEREO OUT] jack.
No sound is output from the
[SEND (AUX1 – 4)] jacks
No sound is output from the
[MONITOR OUT] jack or
[PHONES] jack.
The sound is low, distorted,
or noisy.
Effects are not applied.
Speaking voices are not
clear.
No mixer monitor signal is
output.
Left and right levels are dif-
ferent for a stereo signal
input.
The sound level is unstable
and inconsistent.
The volume of audio play-
back from a computer need
to be adjusted.
If any specific problem should persist, please contact your Yamaha dealer.
 Is the mixer connected to an independent power source (generator, etc.) or a power strip with
switches? Check that the power of that device is turned on.
 Are external instruments (including microphones) and speakers connected correctly?
 Are your cables shorted?
 Are the [GAIN] knobs for each channel, channel faders, [STEREO] master fader, and [GROUP] fad-
ers adjusted to appropriate levels?
 Are the bus assign switches and [LINE
 Are the [ON] switch and [ST] switch for the channels you are using turned on?
 Is the [STEREO] master [ON] switch turned on?
 Are the [SEND MASTER] knobs and [AUX 1 – 4] for each channel set appropriately?
 When the [PRE] switch for [AUX] is off, are the [ON] switches for the channels you are using turned
on?
 Are the [PFL] switches for the channels you are not using turned on?
Turn the [PFL] switches off.
 Are the [GAIN] knobs for each channel, channel faders, [STEREO] master fader, and [GROUP] fad-
ers adjusted to appropriate levels?
 Is the [PAD] switch on? Turn this switch off for sources with low output levels, such as microphones.
 Is the output signal level for the instrument connected to the mixer appropriate?
 Are effect or compressor levels too high? Use the [FX] knob, [FX RTN] fader, [FX RTN LEVEL]
knob, and [COMP] knob to lower their levels.
 Where an input channel provides both a XLR input jack and a phone input jack, or a phone input
jack and an RCA pin jack, are there connections made at both jacks? Use only one of these jacks.
 Is the microphone connected to a [MIC] jack or a [MIC/LINE] jack?
 When using a condenser microphone, is the [PHANTOM +48V] switch turned on?
 When connecting an instrument with an output level of +4 dBu, either turn on the [PAD] switch on a
mono input channel or use a stereo input channel.
 Are the [FX] knobs for each channel adjusted to appropriate levels?
 Is the [ON] button for [FX RTN] turned on?
 Are the [PARAMETER] knob and [FX RTN] fader adjusted to appropriate levels?
 Is the [FX RTN] bus assign switch set appropriately?
 If external effects are connected to the [SEND(AUX1 – 4)] jacks, are the [AUX1 – 4] knobs for
[SEND MASTER] set appropriately?
 Is the [HPF] switch turned on?
 Is the equalizer ([HIGH]/[MID]/[LOW]) adjusted appropriately?
 Are powered speakers connected to the [MONITOR OUT] jacks?
Use the [MONITOR LEVEL] knob to adjust the signal output from the [MONITOR OUT] jacks.
 Is [PAN] set to the center? If panned to the center, try reversing the left and right input connections.
If, after switching the left and right connections, the side with the low volume level also switches,
check the instrument or device that is the source of the signal.
 Are you using the same type of cable to connect both the left and right input signals? Cables with
built-in resistors will attenuate the signal.
 Is the compressor level set too high? Use the [COMP] knob to lower the level.
 Use the "Attenuator Function" . For details, see page 28.
/USB
] switch set appropriately?
MG20XU/MG20/MG16XU/MG16/MG12XU/MG12 Owner's Manual
Troubleshooting
31

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