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Power
• Our favorite question: Is the POWER (20)
switch on?
• Turn off the power from the wall, unplug
the power cord and check the fuse (22).
TROUBLESHOOTING
If you think your Mackie product has a prob-
lem, please do everything you can to confirm it
before calling for service. Doing so might save
you from the deprivation of your mixer and the
associated suffering. Here’s a few troubleshoot-
ing suggestions:
No channel signal
• Is the 1-2 & 3-4 (40) or L-R (41) switch set
correctly?
• Is the CHANNEL FADER (42) turned up?
• Try soloing that channel. Does it appear on
the METERS (54)?
• On mono channels, try unplugging any
INSERT (3) effects devices.
• Try the same signal in another channel, set
up exactly like the suspect channel.
No Output
• Are the L/R ASSIGN (59) switches set
correctly?
• Are the MAIN MIX FADER (72) or SUB-
GROUP FADERs (60) turned up?
• Try unplugging any insert (7) (13) effects
devices.
• If it’s one of the MAIN OUTS (12) (16), try
unplugging the other. For example, if it’s
the MAIN OUTS (TRS) (12), unplug the
associated MAIN OUT (XLR) (16) output.
If the problem goes away, it’s not the mixer.
• If it’s one bad side of a stereo pair, try
switching them around. For example, if a
left output is presumed dead, switch the
left and right cords, at the mixer end. If the
problem stays on the left side, it’s not the
mixer.
Noise
• Turn the CHANNEL FADERs (42) and
STEREO AUX RETURNS (48) down, one
by one. If the sound disappears, it’s either
that channel or whatever is plugged into it,
so unplug whatever that is. If the noise
disappears, it’s from your whatever.
SERVICE INFORMATION