Appendix A: Service Information - Mackie d.4 Pro Owner's Manual

Appendix A: Service Information

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/support)
where you will find lots of useful information such as
FAQs, documentation, and user forums. You may find
the answer to the problem without having to send your
Mackie product away.
Here are some things you can check:
Troubleshooting
No Power
• Our favorite question: Is it plugged in?
• Make sure the power cord is securely seated in the
IEC socket [17] 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 switch [16] is in
the on position (up).
• Are the EQ controls 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 no LEDs are illuminated, and you are certain that
the AC outlet is live, it will be necessary to have
your d.4 Pro serviced. There are no user serviceable
parts inside. Refer to "Repair" on the next page to
find out how to proceed.
20
d.4 Pro DJ Production Console
Bad Channel
• Check the assign switch [37] is not in the off posi-
tion.
• Check the channel's program fader [38] is not fully
down.
• Are that channel's EQ controls all turned down?
• Is the signal source turned up? Make sure the
signal level from the selected input source is high
enough to light up some of the program meter [39]
LEDs.
• Is the correct input chosen with the source [30]
switch, and is its program level [29] turned up far
enough?
• Try the same source signal in another channel, set
up exactly like the suspect channel.
• Make sure the aux knob [35] is turned to fully dry
if you are not using an external processor.
Bad Output
• Is the associated level control (if any) turned up?
• If it's one of the main outputs, try unplugging the
others. For example, if it's the left XLR main out
[12], unplug the left RCA main out [14]. If the
problem goes away, it's not the mixer.
• 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.