Appendix A: Service Information; Troubleshooting - Mackie FRS1700 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.

Troubleshooting

No Power
the IEC socket and plugged all the way into the
AC outlet.
tester or lamp).
the on position.
not, make sure the AC outlet is live.
your local power company to get power restored.
that the AC outlet is live, it will be necessary to
have your amplifier serviced. There are no user
serviceable parts inside. Refer to "Repair" on the
next page to find out how to proceed.
No Sound or Low Output
correctly or they are faulty. Check all cabling,
referring to these instructions for the correct
connections. The best way to check a suspect
cable is to swap it with a known good cable.
Read the loudspeaker's input panel to verify
correct cable connections.
loudspeaker cable to a known good loudspeaker
leaving all equipment set to the same levels.
If the problem disappears, the loudspeaker is
probably not working correctly.
Slowly turn them up and see if you hear
anything.
12
FRS Series Amplifiers
the signal level from the mixing console (or
whatever device immediately precedes the
amplifier) is high enough to produce sound in
the amplifier. The SIG LEDs should be blinking
to indicate that signal is present.
sure the amp mode switch is set to bridge.
thermal protection circuit may have activated.
Allow the amplifier to cool down and normal
operation should resume.
they're blown.
Distorted Sound
level is exceeding the limits of the system
and you must reduce the level from the
mixer or signal source.
down the volume to see if the distortion goes
away. If not, review the owner's manual for the
loudspeakers to ensure that they are a proper
match for the amplifiers.
or summing bus in the mixing console,
and verify that all connections are tight and
that there are no stray strands of wire shorting
across the speaker terminals.
headphones plugged into the console. If it
sounds bad there, the problem is not in the
amplifier.