194
Appendix
Appendix
Troubleshooting
No sound
●
A device is not powered on.
●
An input/output unit is not connected correctly.
●
The devices are not connected correctly.
●
The volume of a connected amp or other device is lowered.
●
A volume level setting is lowered.
• Channel fader
• MAIN fader, AUX faders
• DCA group faders
• MONITOR LEVEL knob
• PHONES LEVEL knob
• MAIN, AUX, or MTX channel attenuator
●
Output patchbay settings are incorrect.
●
The MUTE ALL OUTPUTS button is turned on for a connected
input/output unit.
Sound is not being input
●
A device is not powered on.
●
An input/output unit is not connected correctly.
●
The devices are not connected correctly.
●
Input patchbay settings are incorrect.
●
The channel fader is lowered.
●
The channel is muted.
●
The channel’s MAIN switch is off.
●
The DCA fader to which the channel belongs is lowered.
The preamp of a specific channel is not
shown
●
The input is not patched in the input patchbay.
●
The input that is patched in the input patchbay does not have
a preamp.
Sound is noisy or distorted
●
The preamp gain is inappropriate
The sound will be distorted if the preamp gain is too high. The
proportion of noise will be greater if the preamp gain is too
low.
●
The channel’s dynamics, EQ, etc. are overloading.
Check the overload indication or level meter in the CHANNEL
DISPLAY to see if any section is overloading. If you find a
section that’s overloading, adjust the parameters for it.
926b
The volume level of the instrument
connected to the CONSOLE INPUT jack,
TALKBACK MIC IN jack, or STEREO IN
jack is too low.
Could you be using a connection cable that contains a resistor?
Use a connection cable that does not contain a resistor.
Can’t input successfully from REAC;
noise is heard
If REAC devices are connected incorrectly or if the REAC mode
setting is incorrect, it will not be possible to input from REAC, and
noise may be heard.
In this case, first check the connections between the M-480 and
the input/output units.
●
Make sure that the input/output units are connected to the
correct REAC port
●
Make sure that the REAC mode of the input/output units is
correct
After changing the REAC mode of an input/output unit, you
must cycle the power to that input/output unit.
Then initialize the REAC connection.
1.
Disconnect the REAC cable, and wait for about five
seconds.
2.
Reconnect the REAC cable.
You’ve forgotten the ADMIN password
●
To clear the ADMIN password, switch on the M-480’s power
while holding down the [DISP] button in the USER section and
the [SOLO CLEAR] button in the MONITOR section.
Top panel faders do not work
●
SENDS ON FADER is turned on.
●
The M-480 is in a mode where the faders are used to control
the GEQ.
Can’t read or write USB memory
●
The USB memory is not formatted
●
The USB memory is formatted as other than FAT (e.g., NTFS or
HFS)
●
The USB memory does not have sufficient free space
Overall operation
M-480_e.book 194 ページ ２０１１年３月２日 水曜日 午前９時２０分
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