Troubleshooting
Owner’s Manual
48
Troubleshooting
A FAQ section is available on the Yamaha Pro Audio site.
http://www.yamahaproaudio.com/
Power does not turn on; panel LEDs and the LCD
display do not light.
Is the QL
’s power switch turned on?
Is the power cable connected to a proper AC outlet?
Is the power cable plug inserted all the way - has it
clicked and locked in securely?
If the power still does not turn on, contact your Yamaha
dealer.
The unit is not receiving an input signal.
Did you correctly set the UNIT ID and the DIP
switches on the I/O device connected to the QL
before turning on the power to the devices?
Is the DANTE SETUP for the unit appropriate?
Are the source devices delivering an appropriate sig-
nal?
Is the SIG indicator on the I/O device lit?
If a phantom-powered microphone is connected to
the QL unit, are the I/O device’s +48V MASTER
switch, QL
’s +48V MASTER ON/OFF switch, and
+48V button of each channel set to on?
Is the GAIN of the internal head amp, external head
amp, or I/O device set to an appropriate level?
Is the input port patched to an input channel?
Is the [ON] key indicator of the input channel lit?
Is the fader of the input channel raised?
Are EQ’s attenuators raised?
Could the insert be turned on even though it has not
been specified correctly?
If you are using an optional I/O card, is it installed
correctly?
Sound is not output from headphones or the
MONITOR OUT jacks.
Is the [PHONES] knob or monitor level set to an
appropriate volume?
Is the monitor fader set to an appropriate level?
Has the monitoring source been selected?
Could the DIMMER be applied?
Press the MONITOR button, then check the MONITOR
area on the display.
The sound level is too low.
Is the GAIN or digital gain on the head amplifier,
external head amp device or I/O device set to an
appropriate level?
Is the fader of the input channel raised?
Could the EQ gain be turned down excessively?
Are EQ’s attenuators raised?
Could the GATE/COMP threshold or ratio setting be
set to an extreme value?
Is the fader of the output channel raised?
Try using the various screens of the METER function
to check the levels.
Is the DCA fader assigned to that channel raised?
Could MUTE MASTER be turned on for the channel
assigned to a MUTE group?
Sound is distorted.
Is the word clock set correctly?
Is the GAIN of the internal head amp, external head
amp, or I/O device set to an appropriate level?
Was Gain Compensation turned on when analog
gain is not appropriate? Or, was the analog gain
raised to an extreme while the Gain Compensation is
turned on?
First turn the Gain Compensation function off, set the
analog gain to an appropriate level, and then turn Gain
Compensation back on.
Could the digital gain be set to an extremely high set-
ting?
Could the fader of the input channel be raised too
high?
Could the STEREO channel fader be raised too
high?
Could the EQ gain be set to an extremely high set-
ting?
Is the latency set too low on the DANTE SETUP
screen?
Sound is output even though it is not patched to an
output channel.
Could you have assigned an input channel to direct
out?
Could you have assigned an output channel as the
insert out?
The volume of a specific channel rises and falls.
Could DYNAMICS 1/2 be set to ducking or to an
extreme parameter value?
Operating a fader does not control the level as you
expect.
Could the function access area indicate MIX/MTRX
ON FADER? And could SENDS ON FADER mode
be engaged?
Only the sound of a specific channel is heard from
the MONITOR OUT or PHONES jack.
Could a [CUE] key be on?
Noise occurs from an externally connected recorder
or other device.
Is the word clock set correctly?
Could the input signal be unsynchronized?
Could the oscillator or talkback be turned on?
High frequency range is attenuated.
Could emphasis be applied? This problem will occur
if the input signal status does not match the empha-
sis data.
Could EQ be applied?