LD Systems LDMAUI28MIX Manuel D'utilisation page 13

PROBLEM
System is not operational
although it is switched on.
HI-Z input is in use, but the
guitar is inaudible, although
both the HI-Z and Main
Level knobs are turned up.
MP3 input is in use, but the
MP3 player is inaudible,
although both the MP3
and Main Level knobs are
turned up.
Microphone signal distorted.
Guitar/MP3 signal distorted.
DISPLAY
Power switch and power LED do not
light up.
Power switch, ON LED and Protect LED
light up.
Protect LED remains lit even after
reduction of the volume.
Switch 4 is in the left-hand position
(MP3).
Switch 4 is in the right-hand position
(HI-Z).
TROUBLESHOOTING:
SOLUTION
Check mains connection.
Disconnect the system from the
mains! Check the primary fuse of the
system and replace it if necessary. If
the fuse trips repeatedly, disconnect
the system from the power mains
and hand it over to an authorised
service centre.
System is overloaded. Reduce volume.
Protect LED goes out after a short
time; the system is operational again.
Internal fault. Turn of the system,
disconnect it from the power mains,
and hand it over to an authorised
service centre.
Reduce the volume of the guitar
channel and move the switch to the
right-hand position (HI-Z).
Reduce the volume of the MP3
channel and move the switch to the
left-hand position (MP3).
Reduce the microphone channel
volume and increase the overall
volume (Main Level). Reduce the
volume of any additionally connected
audio source (e.g., keyboard) by the
same amount.
Reduce the guitar/MP3 channel volume
and increase the overall volume (Main
Level). Reduce the volume of any
additionally connected audio source
(e.g., keyboard, microphone) by the
same amount.
Reduce the volume of the audio
source (e.g., guitar, MP3 player) and
increase the channel and/or overall
volume.
13