OnAir 2000M2 Digital Mixing Console
Date printed: 12.11.03 SW V4.0 Hardware 2-5
2.7 Power Supply
For optimum efficiency, switching regulators are used throughout the
whole power supply.
The power supply is made of two identical primary switching power sup-
ply units, delivering each a 24 V
DC
voltage to the secondary power supply,
which converts this voltage to the required ±15 V, +5 V, and +24 V.
Some primary supply units of the first production lot of the OnAir 2000
(89.20.2099) do not have automatic full-range mains voltage selection.
With these power supplies, a jumper cable per unit must be set to the cor-
rect mains voltage range (100...140 or 200...240 V
AC
). The correct position
of this jumper wire is labeled on the PCB.
On the current primary supply units (89.20.2004 or 89.20.2011) the mains
voltage selection is performed automatically.
All the abovementioned primary supply units are short-circuit proof. The
fuses, however, are soldered into the circuit and must not be replaced in
the field. In case of a failure, the complete power supply unit must be re-
placed.
The secondary Power Supply (1.942.105.xx) generates all required volt-
ages for the console except the +48 V phantom power, which is generated
on the Controller Board.
Power consumption of an OnAir 2000M2/24/4 console is about 150 VA.
Power supply 24 V/5 A
89.20.2004 or 89.20.2011
(1st version: 89.20.2099*)
24 VDC
Power supply 24 V/5 A
89.20.2004 or 89.20.2011
(1st version: 89.20.2099*)
* without automatic
voltage selector
Power supply
1.942.105.xx
24 VDC
+15 V
+5 V
–15 V
+24 V
Mains
100...240 VAC,
50...60 Hz
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