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GL2800 User Guide 11
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
voltage is the same as that marked on the rear of the RPS11 power unit. Check that the
correct mains lead with moulded plug has been supplied. Make sure that the IEC mains
plug is pressed fully into the panel socket on the RPS11 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.
Connecting the power supply
Connect the DC power lead between the socket labelled “DC OUT” on the RPS11 and the
socket labelled “DC POWER IN A” on the GL2800.
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.
Turn the console on and off using the power switch on the front of the RPS11 (there is no
separate ON/OFF switch on the console itself). The blue power indicator LED on the
console front panel will illuminate to show that the console is switched on.
Connecting a backup supply
A second power socket, labelled “DC POWER IN B (BACKUP)” is included for plugging in
an optional backup power supply. This provides the reassurance of power supply dual
redundancy, a feature usually found only on 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 be switched off or stop working. The
recommended backup supply for the GL2800 is a second RPS11.
Only use the recommended Allen & Heath power supply unit. 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.
REPLACE FUSE WITH SAME TYPE AND RATING.
ATTENTION: REMPLACER LE FUSIBLE AVEC UN DES MEMES
CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE
T 10A 250V 20mm
CARACTERISTIQUES .
DC FUSES
V+
V-
POWER
ON OFF
A
(BACKUP)
DC POWER IN DC POWER IN
B
ALLEN & HEATH POWER SUPPLY
USE ONLY THE RECOMMENDED
11


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