SYMPTOM
The Power LED does not
light when the unit is
powered on
Sound is distorted, signal
LED is lit red
Sound is excessively noisy
Green "Input" LED barely lit
No audio is heard
Hum or noise from output
TROUBLESHOOTING GUIDE
CAUSE
No power
Input level is too high
Input level is too low
Output level is too low
and Aux Return on mixer
is up full
Bypass function is on
with Mix turned 100%
wet
Output level is too low
Ground loop, unshielded
cables
6
SOLUTION
Check that the power cable
is plugged in properly
Turn down the Input Level
control
Turn up the Input Level
control
Turn Output up and reduce
Aux Return level on mixer
Turn the Mix control to the
left or press the Bypass
footswitch
Turn the Output control to
the right
Try plugging the unit into
another power outlet or use
different audio cables