Appendix A: Service Information - Mackie PPM1012 Owner's Manual

Appendix A: Service Information

If you think your powered mixer has a problem, please
check out the following troubleshooting tips and do your
best to confi rm the problem. Visit the Support section of
our website (www.mackie.com) where you will fi nd lots
of useful information such as FAQs, documentation and
user forums. You may fi nd the answer to the problem
without having to send your mixer away.
Troubleshooting
Bad Channel
• Is the channel EQ set up nicely?
• Is the channel gain set correctly?
• Is the channel fader up enough?
• Is the channel OL led on?
• Is the channel pan set in the middle?
• Is there too much compression on channels
1-6?
• Are the hi-z instrument switches set OK for
guitars connected to channels 7 and 8?
• Try unplugging any insert devices from the
insert jacks on channels 1 to 8.
• Try the same source signal in another channel,
set up exactly like the suspect channel.
• Is phantom power required for your micro-
phones?
Bad Output
• Is the main fader turned up?
• Check the power amp mode switch is set cor-
rectly.
• Are the graphic EQs set to reasonable levels?
• Is the FX level going to the main mix, too high?
• If it's one of the main speaker-level outputs,
try unplugging its companion. For example, if
it's the 1/4" left main output, unplug the left
Speakon output. If the problem goes away, it's
not the powered mixer.
• If a left speaker is presumed dead, connect it
to the right output instead. If the problem stays
with the same speaker, check the speaker wir-
ing, or any speaker fuses.
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PPM1012
• Unplug anything from the main line-level out-
puts, main inserts, or other line-level outputs,
such as mono out, mon 1 send, mon 2 send, FX1
and FX2 send, just in case one of your external
pieces has a problem.
• If the power amp limiter lights come on often,
you may be overdriving the amplifi ers. Check
the loudspeaker average load impedance is not
less than 4 ohms. Check the speaker wiring.
Noise
• Turn the channel gains 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.
Power
• The power LED should come on if the powered
mixer is connected to a suitable live AC mains
outlet, and the power switch is on. Check the
power cord is securely plugged in.
Levitation
• The heavy combined weight of all the loud-
speaker electrons is balanced by the fans and
warm air that make things lighter. During
louder moments when all the electrons are sent
rushing out to your loudspeakers, you may fi nd
that the powered mixer will rise in the air and
hover up and down in sync with the music. This
is perfectly normal.
Repair
For warranty repair or replacement, refer to the war-
ranty information on page 35.
Non-warranty repair for Mackie products is available
at a factory-authorized service center. To locate your
nearest service center, visit www.mackie.com, click
"Support" and select "Locate a Service Center." Service
for Mackie products living outside the United States can
be obtained through local dealers or distributors.
If you do not have access to our website, you can call
our Tech Support department at 1-800-898-3211, Mon-
day-Friday, 7 am to 5 pm Pacifi c Time, to explain the
problem. Tech Support will tell you where the nearest
factory-authorized service center is located in your area.