Troubleshooting
M7CL Owner’s Manual
291
Appendices
Troubleshooting
Power does not turn on, panel LEDs
and the LCD display do not light
❍
Is the M7CL’s Power switch turned on?
❍
If the power still does not turn on, contact your Yamaha dealer.
Sound is not input
❍
Is the optional I/O card installed correctly? (
❍
Is a signal being input from the external device?
❍
Is the input port patched to an input channel? (
❍
Is the GAIN of the internal head amp or external head amp set to an appropriate level? (
❍
Is the EQ attenuator raised? (
❍
If a phantom-powered microphone is connected to the M7CL, the [+48 MASTER] switch must be set to
on. (
❍
If a phantom-powered microphone is connected to the SB168-ES unit, the [+48 MASTER] switch must
be set to on.
❍
Is the Stage Box Setup function set properly? (
❍
Did you correctly set the dip switches on the SB168-ES unit connected to the M7CL-48ES before turn-
ing on the power to the devices? (
❍
Has the firmware of the SB168-ES (connected to the M7CL-48ES) been updated to an appropriate ver-
sion? (
Sound is not output
❍
Is the optional I/O card installed correctly? (
❍
Is the [ON] key indicator of the STEREO channel lit?
❍
Is an output port patched to the output channel? (
❍
Could LCR be on, and the CSR value be set to 1.0? (
❍
Is the [ON] key indicator of the input channel lit?
❍
Is the fader of the input channel raised?
❍
Is the DCA fader assigned to that channel raised? Could MUTE be turned on?
❍
Is the attenuator of the corresponding output channel set to a proper level?
❍
Is the Stage Box Setup function set properly? (
❍
Did you correctly set the dip switches on the SB168-ES unit connected to the M7CL-48ES before turn-
ing on the power to the devices? (
❍
Has the firmware of the SB168-ES (connected to the M7CL-48ES) been updated to an appropriate ver-
sion? (
Sound is not output from headphones
or the MONITOR OUT jacks
❍
Is the [PHONES] knob or [LEVEL] knob set to an appropriate volume?
❍
Is the monitor fader set to a proper level? (
❍
Is the monitoring source selected? (
❍
Is the dimmer applied?
Sound is not loud enough
❍
Is the GAIN of the internal head amp or external head amp set to an appropriate level? (
❍
Is the fader of the input channel raised?
❍
Could the EQ gain be set to an extremely low setting? (
❍
Could the GATE/COMP threshold or ratio be set to an extreme setting? (
❍
Is the EQ attenuator raised? (
❍
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?
Sound is distorted
❍
Is the word clock set correctly? (
❍
Is the GAIN of the internal head amp or external head amp set to an appropriate level? (
❍
Could the fader of the input channel be raised too high?
❍
Could the fader of the STEREO channel be raised too high?
❍
Could the EQ gain be set to an extremely high setting? (
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 GATE/COMP be set to ducking? (
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?
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Could oscillator or talkback be turned on? (
High frequency range is attenuated
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Could emphasis be applied? This problem will occur if the input signal status does not match the
emphasis data. (
❍
Not enough headroom, especially
when EQ boost is applied
❍
Use the EQ attenuator function to lower the level. (
Signal is delayed
❍
Check whether the delay setting for each channel is set correctly. (
Turning a MIX encoder does not
change the send level to the MIX bus
❍
Is the [TO MIX SEND ON/OFF] button turned on?
❍
Is the MIX [ON] key turned on?
❍
Is the MIX bus set to VARI type? (
❍
If the send point is set to POST, could the fader have been lowered?
Can’t save scene memory or library
data
❍
Are you attempting to save the data to a read-only scene/library or a protected scene? (
❍
Could user level restrictions have been specified? (
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