Troubleshooting - Yamaha MG166C Owner's Manual

Reference

Troubleshooting

Power doesn't come on.
No sound.
Sound is faint, distorted, or
noisy.
No effect is applied.
(If you are using MG166CX)
I want spoken words to be
heard more clearly.
I want to output a monitor
signal through speakers.
The level meter doesn't
show the output signal
level.
20
MG206C/MG166CX/MG166C Owner's Manual
❑ Is the supplied power adaptor properly plugged into an appropriate AC wall
outlet?
❑ Is the supplied power adaptor properly plugged into the mixer?
❑ Are microphones, external devices, and speakers connected correctly?
❑ Are the ON switch and ST switch of the channels you are using turned ON?
❑ Are the channel GAIN controls, Channel fader, STEREO OUT Master fader
and GROUP 1-2/3-4 fader set to appropriate levels?
❑ Are the MONITOR switch and 2TR IN switch set properly?
❑ Are your speaker cables connected properly, or are they shorted?
❑ If the above checks do not identify the problem, call Yamaha for service.
(Refer to the page 71 for a list of service centers.)
❑ Are the channel GAIN controls, Channel fader, STEREO OUT Master fader
and GROUP 1-2/3-4 fader set to appropriate levels?
❑ Are two different instruments connected to the XLR-type and phone jacks, or
to the phone and RCA pin jacks on one channel? Please connect to only one
of these jacks on each channel.
❑ Is the input signal from the connected device set to an appropriate level?
❑ Are you applying the effects at an appropriate level?
❑ Are microphones connected to the MIC input jacks?
❑ If you are using condenser microphones, is the PHANTOM +48 V switch
turned ON?
❑ Check that the EFFECT control on each channel is correctly adjusted.
❑ Be sure that the internal effect unit's ON switch is turned ON.
❑ Be sure that the EFFECT PARAMETER control and EFFECT RTN fader are
correctly adjusted.
❑ Be sure that the
switches are ON.
❑ Adjust the equalizers (HIGH, MID and LOW) on each channel.
❑ Connect a powered speaker to the AUX 1, 2 or 3 jack (MG206C), or to the
AUX1 or 2 jack (MG166CX/MG166C) and turn the PRE switch on each chan-
nel on. Then adjust the output signal by using the AUX controls on each chan-
nel and the Master SEND control.
❑ Are the PFL switches for the channels that you are not using turned on?