Poor sound
•
Is it loud and distorted? Make sure that a stage
in the signal chain is not being overdriven.
Verify that all level controls are set properly.
•
Is the input connector plugged com plete ly into
the jack? Be sure all con nec tions are secure.
Noise
•
Make sure all connections to the active
loudspeakers are good.
•
Make sure none of the signal cables are routed
near AC cables, power trans form ers, or other
EMI-inducing devices.
•
Is there a light dimmer or other SCR-based
device on the same AC cir cuit as the HDA? Use
an AC line fi lter or plug the HDA into a
dif fer ent AC circuit.
Hum
•
Try dis con nect ing the cable connected to the
main input jack. If the noise disappears, it
could be a “ground loop,” rather than a
problem with the HDA. Try some of the
following troubleshooting ideas:
• Use balanced connections throughout the
system for the best noise rejection.
• Whenever possible, plug all the audio
equip ment’s line cords into outlets which
share a common ground. The dis tance
between the outlets and the common ground
should be as short as possible.
Repair
For warranty service, refer to the warranty
information on page 29.
Non-warranty service for Mackie products is
available at a factory-authorized service center. To
locate the nearest service center, visit www.mackie.com,
click “Support” and select “Locate a Service Center.”
Service for Mackie products outside the United States
can be obtained through local dealers or distributors.
If you do not have access to our website, you may call
the Tech Support department at 1-800-898-3211,
Monday-Friday, during normal business hours, Pacifi c
Time, to explain the problem. Tech Support will tell you
where the nearest factory-authorized service center is
located in your area.
If you think there is a problem with your Mackie HDA,
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/support)
where lots of useful information such as FAQs and other
documentation reside. You may fi nd the answer without
having to send the HDA away.
Troubleshooting
No power
•
Is it plugged in? Make sure the AC outlet is live
(check with a tester or lamp).
•
Is the ON LED on the rear panel glowing green?
If not, make sure the AC outlet is live. If so,
re fer to “No sound” below.
•
The internal AC line fuse may be blown. This is
not a user serviceable part. If a blown AC line
fuse is the suspect, please see the "Repair"
section next.
No sound
•
Is the signal source working? Make sure the
con nect ing cables are in working order and
se cure ly connected at both ends. Make sure the
output volume (gain) control on the mixing
console is turned up suf fi cient ly to drive the
inputs of the speaker.
•
Make sure the mixer does not have a Mute on
or a Processor loop en gaged. If so, make sure
the volume/gain is turned down before
disengaging the offending switch.
•
Is the thermal indicator lit red on the rear
panel? Make sure there is at least six inches of
free space behind the HDA.
Poor bass performance
•
Check the polarity of the connections between
the mixer and the loud speak ers. The positive
and negative connections may be re versed
at one end of one cable, causing one or more
loud speak ers to be out-of-phase.
•
Poor bass performance may be the result of bad
AC power. See the section titled ‘AC Power’ on
page 21 for further details.
Appendix B: Service Information
23
Owner’s Manual
Owner’
s Manual