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3.2. Power Supply
The amplifier uses two power supplies. A professional switch mode power supply 50V / 32A
for power amplifier, and small 12V power supply for logic and protection circuits.
Main power supply contains special soft start circuits, uses two fans, which are visible from
the rear side of PA. It has its own logic to control these fans speed.
Power amplifier should be connected to any external source of AC in the range from 100VAC
to 250VAC, 50 or 60 Hz. It can be powered by a portable generator, for example.
Switch Mode Power Supply and the
Supply Board. Two fuses are visible.
3.3. Safety Devices
Control and monitoring circuits ensure control and safety during malfunctions of the PA.
These are on the Control board and the Protection board. Control board is located behind the
front panel. Protection board is visible on the right hand side of PA, close to the input/output
relay.
Protection Board at the top
Input/Output Relay in the middle
Communication Board at the bottom
(LAN)