14
HR84 MK
HR824 MK2

SERVICE INFO

Details concerning Warranty Service are spelled out in
the Warranty section on page 19.
If you think your monitor 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 prob-
lem without having to send your monitor away.

Troubleshooting

No Power

• Our favorite question: Is it plugged in?
• Make sure the power cord is securely seated in the IEC
socket [7] and plugged all the way into the AC outlet.
• Make sure the AC outlet is live (check with a tester or
lamp).
• Is the power [9] switch on the front panel pushed in
and the POWER MODE [6] switch on the rear panel in
the ON position?
• Is the power ring [10] on the front panel illuminated?
If not, make sure the AC outlet is live. If so, refer to “No
Sound” below.
• If the power ring is not illuminated, and you are certain
that the AC outlet is live, it will be necessary to have
the HR824 MK2 serviced. There are no user-serviceable
parts inside. Refer to “Repair” at the end of this section
to find out how to proceed.

No Sound

• Is the power ring [10] on the front panel illuminated? If
not, refer to “No Power” above.
�� Is the INPUT SENSITIVITY [2] control turned up?
• Is the signal source turned up? Make sure the signal level
from the mixing console (or whatever device immedi-
ately precedes the studio monitor) is high enough to
produce sound.
• If it’s a stereo pair, try switching them around. For
example, if a left output is presumed dead, switch the
left and right cords at the monitor end. If the problem
switches sides, it’s not the monitor. It could be a bad
cable, or no signal from the mixer.

Bad Sound

• Is the input connector plugged completely into the
jack? If using a 1⁄4" TS or TRS plug, make sure it is
plugged all the way in.
• Is it loud and distorted? Reduce the signal level at the
mixer.
• If possible, listen to the signal source with headphones
plugged into the preamp stage. If it sounds bad there,
it’s not the monitor.
• Too much bass or not enough bass? Move around the
room and see if the bass response changes. It’s possible
your listening position coincides with a room mode
where the low frequencies either become exaggerated
or nulled. If so, try moving the monitors to a different
position, or moving your listening position.

Noise/Hum/Buzz

• Check the signal cable between the mixer and the
monitor. Make sure all connections are secure. These
problems usually produce crackling noises, hum, or
buzz.
• If connecting an unbalanced output to the HR824 MK2
balanced input, make sure the shield is connected to the
unbalanced ground of the source and to pins 1 and 3 of
the XLR (or the sleeve and ring of the TRS jack).
• If a CATV cable is connected to the system, try discon-
necting it. If the hum goes away, call your cable carrier
to check for proper grounding of the cable.
• Make sure the signal cable is not routed near AC cables,
power transformers, or other EMI sources (including
wall warts and line lumps!). These sources usually
produce hum.
• Is there a light dimmer or other triac-based device on
the same AC circuit as the monitor? Dimmers cause
buzzing noises. Use an AC line filter or plug the monitor
into a different AC circuit.
• Excessive hiss is an indication of an incorrect gain set-
ting somewhere before the speaker.
• If possible, listen to the signal source with headphones
plugged in. If it sounds noisy there, it’s not the monitor.

I hear sound from the monitors after I switch

the AC power off!

• Use the front panel switch to turn the monitors on and
off, or turn off the signal going to the monitors when the
AC power is turned off.