Chapter Five: Troubleshooting - Alesis MultiMix8FX Reference Manual

5 Troubleshooting
If you're having problems operating the MultiMix-8FX, this
troubleshooting index will help you correct them.
Symptoms
No sound from the mixer.
Audio signal is distorted.
Audio signal carries an
unwanted hum.
Cause
Mixer is not plugged in or
turned on.
Channel levels are too low.
Control room level is turned
down
The appropriate signal hasn't
been assigned to the control
room out.
Cable is not plugged into
output jack.
Headphones are not plugged
into PHONE jack.
Monitor or headphone
amplifier is turned off or
down.
Bad cable.
Channel level is too high.
Channel input is too high.
AUX RET level is too high.
MAIN MIX level is too high.
Too much low-level noise in
the mix.
Interference from appliances
such as air conditioners.
Solution
Plug in mixer and turn it on.
Turn up channel levels.
Turn up control room level.
In the master section of the
mixer, be sure the right switch is
selected.
Check outputs to make sure
cables are plugged in securely.
Plug headphones into PHONE
jack.
Turn amplifier on or up.
Check all cables; substitute
cables with known good ones.
Set channel levels using the
procedure on page 16.
Turn down your instrument to a
normal volume and then set
channel levels using procedure
on page 16.
Lower the level of AUX RET A
or B in the master section of the
mixer.
Turn down the MAIN MIX
level control in the master
section of the mixer.
Engage the channel's high-pass
filter by pressing the HPF
switch.
Engage the channel's high-pass
filter by pressing the HPF
switch.
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