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16:2 and 12:2 User Guide 9
Connecting Power
Read and understand the Important Safety Instructions printed at the start of this guide,
and the warnings printed on the rear of the console. Check that your local mains supply is
within the 100-240V operating voltage range allowed. Check that the correct mains lead
with moulded plug has been supplied with your console. Make sure that the IEC mains plug
is pressed fully into the panel socket before switching on.
Grounding
The connection to ground in an audio system is important for two reasons:
1. SAFETY - To protect the operator from high voltage electric shock, and
2. AUDIO PERFORMANCE - To minimise the effect of ground (earth) loops which result in
audible hum and buzz, and to shield the audio signals from interference.
For safety it is important that all equipment grounds are connected to mains ground so that
exposed metal parts are prevented from carrying high voltage which can injure or even kill
the operator. Do not disconnect the ground connection in the mains lead. It is
recommended that the system engineer check the continuity of the safety ground from all
points in the system including microphone bodies, turntable chassis, equipment cases, rack
metalwork and so on.
Switching the console on and off
It is good practice to turn power amplifiers off before switching the console and any other
connected equipment on or off. This prevents any unexpected clicks or thumps when the
equipment is powered up.
Turn amplifiers and powered speakers on last and off first.
To turn the console on, press the ON/OFF switch next to the IEC mains input socket. To
turn the console off, press this switch again.
Connecting a backup supply
A socket is included for plugging in an optional backup power supply. This provides the
reassurance of power supply dual redundancy, a feature usually found only in expensive top
end consoles. The console uses diode combining technology so that both supplies can be
powered at the same time. One will automatically take over should the other stop working.
The recommended backup supply for the MixWizard is the Allen & Heath MPS12 power unit.
Refer to the user guide which comes with this supply.
Only plug the recommended Allen & Heath power unit into this socket. Do not
attempt to modify any other power unit to work with the console. Do not attempt to modify or
extend the DC power cable that comes with the supply.
The console can work with just the internal supply powered by mains, or just the backup
supply, or with both powered at the same time. To ensure uninterrupted performance in the
unlikely event of a failure, we recommended that both supplies are powered.
EXTERNAL DC IN
RECOMMENDED ALLEN&HEATH POWER SUPPLY
REFER TO USER GUIDE FOR DETAILS
Serial No.
WARNING: THIS APPARATUS MUST BE EARTHED
DO NOT EXPOSE THIS APPARATUS TO RAIN OR MOISTURE.WARNING: TO REDUCE THE RISK OF ELECTRIC SHOCK
AVIS: RISQUE DE CHOC ELECTRIQUE - NE PAS OUVRIR.
RISK OF ELECTRIC SHOCK
CAUTION
DO NOT OPEN
ATTENTION: REMPLACER LE FUSIBLE AVEC UN DES MEMES CARACTERISTIQUES.
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE REPLACE FUSE WITH SAME TYPE AND RATING.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
100 - 240V~ 47-63Hz 45W MAX
AC MAINS IN ~
FUSE
T630mA L 250V 20mm
ON
I
0
OFF
ENGINEERED IN ENGLAND BY ALLEN & HEATH LIMITED
9


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