Trouble Shooting
58
If this unit stops operating normally, check the following items.
If taking the directed action does not correct the problem, or if there
is a problem not listed here, disconnect the power cord from the elec-
trical outlet and contact KORG customer service.
Problem
Cause
Action
The power won’t
turn on.
This unit is connected to a generator or to a
switched power strip, and the power source
is switched off.
Turn on the power of the generator or the
switched power strip.
No sound is output.
External equipment (instrument, micro-
phone, etc.) is not connected correctly.
Check the connections to the external
equipment.
The cable used for connection to external
equipment (instrument, microphone, etc.)
is shorted or broken.
Check the connections to the external
equipment. Replace the cable as necessary.
Gain or faders are not adjusted appropri-
ately.
Use the appropriate channel's GAIN knob
and channel fader, the SUB GROUP MASTER
faders, or the MAIN MIX (L/R) fader to
adjust the levels.
Output is disabled for the corresponding
channel.
Check the state of the corresponding
channel's MUTE button and bus assign
switches, the MUTE GROUP buttons, and the
BREAK button.
No sound from the
AUX OUT output
jacks.
The signal levels of the AUX 1–4 buses are
not adjusted appropriately.
Use the corresponding channel's AUX (1–4)
SEND knobs to adjust the signal level.
No sound from the
PHONES jack and
MONITOR OUT jack.
The AFL function of the corresponding bus
is disabled.
Use the AFL switch of the corresponding
bus to enable the AFL function.
The PFL function of an unused channel is
enabled.
Use the PFL switch of the corresponding
channel to disable the PFL function.
The sound is ex-
tremely quiet, or is
distorted or noisy.
Gain or faders are not adjusted appropri-
ately.
Use the appropriate channel's GAIN knob
and channel fader, the SUB GROUP MASTER
faders, or the MAIN MIX (L/R) fader to
adjust the levels.
The output level of an external device
connected to this unit is not appropriate.
Adjust the output level of the external
device.
The compressor or effect is applied
excessively.
Use the corresponding channel's COMP
knob or FX SEND knob to adjust each effect.
An external device is connected to both
the XLR jack and phone jack of the same
channel.
Do not connect an external device to both
jacks. Use only one of the jacks.
A condenser mic is being used with phan-
tom power turned off.
Turn the 48V MIC PHANTOM switch on.
The sound is un-
steady.
The compressor is applied excessively.
Use the corresponding channel's COMP
knob to adjust the compression effect.
There is volume in-
consistency between
the left and right of
the stereo audio.
Volume balance (left/right) is not adjusted
appropriately.
Use the corresponding channel's PAN knob
to adjust the volume balance.
Different cables are being used for the left
and right connections with the external
device.
Use the same cables for left and right when
connecting an external device.
Level meter does not
work.
The PFL function of an unused channel is
enabled.
Use the PFL switch of the corresponding
channel to disable the PFL function.
Sound from an
iPhone/iPad is not
output.
The iPhone/iPad is insufficiently charged.
Charge the iPhone/iPad and then try again.
The iPhone/iPad connected to the USB port
is not supported by this unit.
Use an iPhone/iPad that is supported by
this unit (page <OV>).