Specifications

5 Troubleshooting
29
If you’re having problems operating the MultiMix-12FX, this
troubleshooting index will help you correct them.
Symptoms Cause Solution
No sound from the mixer. Mixer is not plugged in or
turned on.
Plug in mixer and turn it on.
Faders are too low. Raise appropriate faders.
Control room level is turned
down
Turn up control room level.
The appropriate signal hasn’t
been assigned to the control
room out.
In the master section of the
mixer, be sure the right switch is
selected (MIX, ALT 3/4 or
2TK)
Cable is not plugged into
output jack.
Check outputs to make sure
cables are plugged in securely.
Headphones are not plugged
into PHONE jack.
Plug headphones into PHONE
jack.
Monitor or headphone
amplifier is turned off or
down.
Turn amplifier on or up.
Bad cable. Check all cables; substitute
cables with known good ones.
Audio signal is distorted. Channel level is too high. Set channel levels using the
procedure on page 16.
Channel input is too high. Turn down your instrument to a
normal volume and then set
channel levels using procedure
on page 16.
AUX RET B level is too
high.
Lower the level of AUX RET B
in the master section of the
mixer.
MAIN MIX level is too high. Lower the MAIN MIX fader in
the master section of the mixer.
ALT 3/4 level is too high. Lower the ALT 3/4 fader in the
master section.
Audio signal carries an
unwanted hum.
Too much low-level noise in
the mix.
Engage the channel’s high-pass
filter by pressing the HPF
switch.