PROBLEM
CHECK
CORRECTION
No sound
(LCD not lit)
Is power switch on? Is
line cord connected to
live power outlet?
Turn power switch on. Connect power
cord to live outlet
No sound
(LCD not lit)
Are MASTER and
CHANNEL GAIN
controls up?
Adjust both MASTER and CHANNEL
VOLUME controls upward to desired
level. Check speaker connections.
Turn mic switch on. Check mic or
sound source connection.
No Effects
Are the channel
EFFECT controls
turned up?
Are the master EFFECT
controls turned up?
Make sure the channel effect control
is turned up. Check the master effect
controls. Adjust master effect controls
until audio effect is heard.
Files on USB
memory
device will not
play back
Is the file cued for
playback?
Are the audio files the
proper format?
Check that you are in the proper in-
put mode. Make sure your audio files
are the correct format. See the list of
supported audio formats mentioned
previously in this manual.
Loud howling
or squeal from
speakers
If it goes away when
the CHANNEL VOL-
UME or MASTER
VOLUME controls are
turned down, then it is
acoustic feedback.
Reduce microphone gain. Reposition
microphone behind or farther from
speakers.
Sound is
distorted
Is the CHANNEL
LEVEL at a very high
setting?
Reduce CHANNEL LEVEL and in-
crease MASTER VOLUME
