13.5. Troubleshooting
Symptom
Possible causes
Possible solution
Display is not shown
The DIMMER (DIMMER
BRIGHTNESS) setting is at 0%.
Set the DIMMER (DIMMER
BRIGHTNESS) setting to 25% or
higher.
The display indication disappears if
the unit is not operated for a time.
To protect the display, the display
indication disappears 30 minutes
after the PC-D/DI series unit was
last operated.
To bring back the display, press any
front panel key or turn the knob.
Display is dim.
The PANEL SETUP screen’s
"BRIGHTNESS" is set to a low value.
Set "BRIGHTNESS" to a high value.
When no operation is performed for
a time, the AUTO DIMMER function
automatically dims the screen.
To bring back the display, press any
front panel key or turn the knob.
Power does not turn on. Power
suddenly turns off, and immediately
turns off even if you turn the power
on again.
The power supply voltage of the
connected AC outlet is significantly
outside the allowable range.
Connect a power supply of the
appropriate voltage.
The interior of the amp is at a high
temperature, perhaps because an
obstruction or dust is blocking the
ventilation and impairing the
cooling.
Check the ventilation status, and
take measure to ensure cooling.
Then, after waiting for the unit to
cool down, turn the power on again.
The output level is too high.
Lower the output level.
The sound from the speaker is
distorted.
The input level exceeds the input
sensitivity setting.
Using the AMP SETTINGS screen’s
SENS./GAIN setting, adjust the input
sensitivity appropriately for the
input level.
Sound is muffled. High frequencies
are not output.
A filter is applied. The filter status
can be viewed in the HOME screen’s
SP PROCESSOR page.
Use X-OVER to change the filter
settings.
No sound from the speakers.
A cable is not connected correctly.
If the meter does not rise even when
you raise the volume knob, there
could be a problem with the input
connection. If the meter does rise,
there could be a problem with the
output connection.
Correctly connect the input jacks
and output jacks. For the output
connection, also check that you are
connected to the jack that is
outputting the signal.
The output is turned down on the
mixer connected to the input jack.
This is possible if the meter does
not rise even when you raise the
volume knob.
Raise the mixer’s output.
The level is lowered by the volume
knob.
Adjust the volume knob.
The mute function is on. In the
HOME screen you can check
whether the mute function is on.
Turn off the mute function.
The protection circuit has operated
to mute the output. If the protection
circuit has operated, the display
indicates [PROT], and the indicator
of the corresponding channel
flashes red.
Check the operation log to
determine the reason that the
protection circuit operated, and
correct the cause.
Panel operations are not possible.
Panel lock is enabled.
Defeat the panel lock function. For
the method, refer to "Panel lock."
13. Reference
PC412-D PC412-DI PC406-D PC406-DI Owner’s Manual |
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