MULTI-CHANNEL ANALOG MIXERS WITH ENHANCED FX, USB RECORDING MODES, AND BLUETOOTH®
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Appendix A : Service Information
Troubleshooting
If you think your Mackie product has a problem, please check out the following troubleshooting tips and do your best to confirm
the problem. Visit the Support section of our website (www.mackie.com) to get some ideas or contact our technical support
heroes. You may find the answer to the problem without having to send your Mackie product away.
Here are some useful tips that could correct any of the issues outlined below (or possibly any other issue that we haven’t yet
discovered):
Level setting procedure. If you are having any sound (or non-sound) issues, try following the level setting procedure
[page 8] to verify that all of the volume controls in the system are properly adjusted.
There are no user serviceable parts. If none of these tips work, please refer to “Repair” on the next page to find out how
to proceed.
No Power
•
Our favorite question: Is it plugged in? Make sure the AC outlet is live [check with a tester or lamp].
•
Our next favorite question: Is the power switch on? If not, try turning it on.
•
Make sure the line cord is securely seated in the line cord socket and plugged all the way into the AC outlet.
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Is the power LED on the top panel illuminated? If not, make sure the AC outlet is live. If so, refer to “No sound” below.
•
The internal AC line fuse may be blown.This is not a user serviceable part.
If you suspect the AC line fuse is blown, please see the “Repair” section next.
•
Are all the lights out in town? If so, contact the local power company to get power restored.
No Sound
•
Are all the connections good and sound? Make sure all of the connecting cables work and are securely connected
at both ends. Try the same source signal in another channel, set up exactly like the suspect channel. Make sure
the master volume level is turned up sufficiently to drive the inputs of the speakers.
•
Is the level knob for the input source turned all the way down? Verify that all the volume controls in the system
are properly adjusted. Look at the level set LEDs and meters to ensure that the mixer is receiving a signal.
•
Make sure the input source is not muted or has a processor loop engaged. If you find something like this,
make sure the level is turned down before disengaging the offending switch.
•
Is the main level turned up?
•
Unplug anything from the other line-level outputs, such as monitor out, just in case one of the external pieces
has a problem.
•
Make sure that you are not overdriving the amplifiers. Check the loudspeaker average load impedance is not less
than the minimum the amplifier can handle. Check the speaker wiring.
•
Is the signal source powered on? Is it working (and making union scale)?