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MGP16X/MGP12X Owner’s Manual
27
Troubleshooting
* If any specific problem should persist, please contact your Yamaha dealer.
Power doesn’t come on. Is an independent power-supply unit such as a power generator, or a power strip with switch
plugged into the mixer?
Make sure that the power is turned on.
No sound. Are microphones, external devices, and speakers connected correctly?
Is a Y-shaped cable used to connect the INSERT connector or an external device?
Are your cables connected properly, or are they shorted or faulty?
Are the channel GAIN controls, channel faders, STEREO master fader and GROUP 1-2/3-4 faders
set to appropriate levels?
Are the bus assign switch and 2TR IN switch set properly?
(When using STEREO OUT jacks) Are the ON switch and ST switch of the channels you are using
turned ON?
(When using STEREO OUT jacks) Is the ON switch of the STEREO master turned on?
(When using AUX 1/2 and FX 1/2 jacks) Are the respective SEND MASTER control, AUX 1/2 and
FX 1/2 controls of each channel set to appropriate levels?
(When using MONITOR OUT jacks ) Are the PFL switches for the channels that you are not using
turned on? Make sure to turn off the PFL switch.
[For signals that are input to the 2TR IN and CH15/16 (CH11/12) jacks] Is the routing assign switch
set to USB ( )? Make sure to set the switch to ANALOG ( ).
Sound is faint, distorted, or
noisy.
Are the channel GAIN controls, channel faders, STEREO master fader and GROUP 1-2/3-4 faders
set to appropriate levels?
Is the 26dB switch turned on?
Make sure to turn off the switch when a low-level source, such as a microphone, is input.
Is the output signal from the connected device set to an appropriate level?
Are you applying the effects and compressor at appropriate levels?
You may have to lower the FX (1, 2) control, FX RTN fader, and COMP control levels.
Are two different instruments connected to the XLR-type and phone jacks, or to the phone and RCA
pin jacks on one channel?
Make sure to connect to only one of these jacks on each channel.
Are microphones connected to the MIC input jacks or MIC/LINE input jacks ?
If you are using condenser microphones, is the +48V switch turned ON?
If you are connecting a device which has a specified output level of +4dBu, turn on the 26dB (PAD)
switch of the mono channels or use stereo channels.
(Stereo channel) Is the DUCKER switch turned on?
When a signal is constantly input to CH4 (MGP12X)/CH8 (MGP16X), the sound becomes faint.
No effect is applied. Check that the EFFECT knob on each channel is correctly adjusted.
Check whether the ON button of FX1/FX2 is turned on or off.
Be sure that the PARAMETER control and FX RTN fader are correctly adjusted.
Check that the switch for the desired bus in the FX1/FX2 RTN bus assign switches is turned on.
When an effect device is connected to the FX1 or FX2 jack, is the FX1 or FX2 control on the SEND
MASTER set to appropriate levels?
The FX1/FX2 ON buttons are
not locked.
The FX1/FX2 ON buttons are of a type that do not lock.
I want spoken words to be
heard more clearly.
Make sure that the switch is turned ON.
Are the equalizers (HIGH, MID, and LOW knobs) on each channel adjusted appropriately?
I want to output a monitor
signal for the mixer through
speakers.
Connect a powered speaker to the MONITOR OUT jack.
Make sure to adjust the level of output signal from the MONITOR OUT jack with the MONITOR/
PHONES control.
The level meter doesn’t
show the output signal level.
Are the PFL switches for the channels you are not using turned on?
Make sure to turn off the PFL switch.
iPod/iPhone signal is not
output.
Is the USB cable that came with Pod/iPhone properly connected to the mixer?
Is the routing assign switch set to USB ( )?
Is the LED indicator turned off?
The mixer has not recognized your iPod/iPhone. Check which iPod/iPhone models are supported.
The supported iPod/iPhone
is not recognized.
If your iPod/iPhone has not been charged, it may take some time to be recognized by the mixer.
Please wait.
When a stereo signal is
input, the left and right vol-
ume is different.
Is the pan control set to the center position?
If it is located in the center, try swapping the connections. If the lesser/greater volume signals are
also switched, check the connected device(s).
Is the same type of cable used for the right and left signals?
A cable with resistance lowers the volume.
The sound level is inconsis-
tent, or there is an unnatural
“pumping” in the sound.
Are you applying the compressor at an appropriate level?
You might have to lower the COMP control levels.
The Leveler is not enabled. Is the GAIN control on the stereo channels adjusted appropriately?
The Leveler may not be enabled if you increase the gain too much.