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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? (→ p. 49)
❍ Is a signal being input from the external device?
❍ Is the input port patched to an input channel? (→ p. 108)
❍ Is the GAIN of the internal head amp or external head amp set to an appropriate level? (→ p. 51, 61)
❍ Is the EQ attenuator raised? (→ p. 115)
❍ If a phantom-powered microphone is connected to the M7CL, the [+48 MASTER] switch must be set to
on. (→ p. 229)
❍ 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? (→ p. 242)
❍ 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? (→ p. 44, 45)
❍ Has the firmware of the SB168-ES (connected to the M7CL-48ES) been updated to an appropriate ver-
sion? (→ p. 16)
Sound is not output
❍ Is the optional I/O card installed correctly? (→ p. 49)
❍ Is the [ON] key indicator of the STEREO channel lit?
❍ Is an output port patched to the output channel? (→ p. 105)
❍ Could LCR be on, and the CSR value be set to 1.0? (→ p. 63)
❍ 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? (→ p. 242)
❍ 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? (→ p. 44, 45)
❍ Has the firmware of the SB168-ES (connected to the M7CL-48ES) been updated to an appropriate ver-
sion? (→ p. 16)
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? (→ p. 154)
❍ Is the monitoring source selected? (→ p. 154)
❍ 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? (→ p. 51, 61)
❍ Is the fader of the input channel raised?
❍ Could the EQ gain be set to an extremely low setting? (→ p. 115)
❍ Could the GATE/COMP threshold or ratio be set to an extreme setting? (→ p. 118)
❍ Is the EQ attenuator raised? (→ p. 115)
❍ Is the fader of the output channel raised?
❍ Try using the various screens of the METER function to check the levels. (→ p. 167)
❍ Is the DCA fader assigned to that channel raised?
Sound is distorted
❍ Is the word clock set correctly? (→ p. 230)
❍ Is the GAIN of the internal head amp or external head amp set to an appropriate level? (→ p. 51, 61)
❍ 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? (→ p. 115)
Sound is output even though it is not
patched to an output channel
❍ Could you have assigned an input channel to direct out? (→ p. 112)
❍ Could you have assigned an output channel as the insert out? (→ p. 110)
The volume of a specific channel rises
and falls
❍ Could GATE/COMP be set to ducking? (→ p. 118)
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? (→ p. 230)
❍ Could the input signal be unsynchronized?
❍ Could oscillator or talkback be turned on? (→ p. 161, 164)
High frequency range is attenuated
❍ Could emphasis be applied? This problem will occur if the input signal status does not match the
emphasis data. (→ p. 230)
❍ Could EQ be applied? (→ p. 115)
Not enough headroom, especially
when EQ boost is applied
❍ Use the EQ attenuator function to lower the level. (→ p. 115)
Signal is delayed ❍ Check whether the delay setting for each channel is set correctly. (→ p. 105)
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? (→ p. 234)
❍ 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? (→ p. 135)
❍ Could user level restrictions have been specified? (→ p. 212)