Mackie Quad Gate, Руководство пользователя, Страница: 18 / 24

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QUAD COMP/GATE
QUAD-C
OMP
/
GA
TE
19
Owner’s Manual
Owner’
s Manual
Appendix A: Service Information
• Try the same source signal in another channel, set
up exactly like the suspect channel.
Bad Output
• If it’s one of the outputs, try unplugging the others.
For example, if it’s an XLR output, try unplugging
any TRS outputs if used. If the problem goes away,
it’s not the Quad Comp/Gate.
• If a left output is presumed dead, switch the left
and right cords at the Quad Comp/Gate end. If the
problem stays on the left side, it’s not the Quad
Comp/Gate, but maybe the left amplifier channel, a
bad cord, or left speaker.
Bad Sound
• Are the input and output connectors plugged com-
pletely into the jacks?
• Press either BYPASS button and listen for any im-
provement.
• Is the key-filter listen on? If so, then the LED will
light below each key filter knob. Turn this off by
pressing the key filter knobs in.
• If possible, listen to the signal with headphones
plugged into the input source device or mixer. If it
sounds bad there, it’s not the Quad Comp/Gate caus-
ing the problem.
• Have you gone a tad overboard with the settings?
• Has the band been together long? (Don’t ask them
this, as it might cause bad feelings or a black eye.)
No Compression
• If the SIDECHAIN is engaged, and yet there is noth-
ing plugged into the SIDECHAIN RETURNs, there
will be no compression.
Noise/Hum
• Turn down each mixer channel, one by one. If the
noise disappears, it’s coming from whatever is
plugged into that channel. Check your whatever.
• Check the signal cables between the mixer and the
Quad Comp/Gate. Disconnect them one by one. If the
noise goes away, you’ll know which input is causing
the problem.
• Sometimes it helps to plug all the audio equipment
into the same AC circuit so they share a common
ground.
Warranty Service
Details concerning Warranty Service are spelled out in
the Warranty section on page 23.
If you think your Quad Comp/Gate has a problem, please
do everything you can to confirm it before calling for
service. Doing so might save you from the deprivation of
your Quad Comp/Gate and the associated suffering.
These may sound obvious to you, but here are some
things you can check. Read on:
Troubleshooting
No Power
• Our favorite question: Is it plugged in?
• Make sure the power cord is securely seated in the
IEC socket, and plugged all the way into the AC
outlet.
• Make sure the AC outlet is live (check with a tester
or lamp).
• Make sure the rear panel POWER [2] switch is in
the ON position.
• Is anything on the front panel illuminated? If not,
make sure the AC outlet is live.
• Are all the lights out in your town? If so, contact
your local power company to get power restored.
• If nothing is illuminated, and you are certain that
the AC outlet is live, it will be necessary to have your
Quad Comp/Gate serviced.
There are no user service-
able parts inside. Refer to “Repair” on the next page
to find out how to proceed.
Bad Channel
• If one channel sounds bad, try pressing BYPASS on
that channel. If it improves things, carefully check
your settings on that channel.
• Look at the OUTPUT METER [10] ladder and
check and adjust the GAIN [37] knob if needed.
• Check there are no extreme settings of the gate or
compressor, or the key filters.
• Try turning the Quad Comp/Gate off. The connec-
tions between the input and output are then joined
internally, and this should allow your mixer and
amps to still play. If a channel is still missing, you
may have a bad connection cable either into or out
of the Quad Comp/Gate, or a bad mixer output or
amplifier.