Service manual

Power Supply
3-9
3Power Supply
The Power Supply connects the instrument to the AC line to charge the battery and power
the circuitry. It conditions and regulates all power supplied to the Main Board.
Figure 3-3 Power Supply Block Diagram
Voltage Selector
The voltage selector connects the line input to the proper windings on the Power
Transformer to produce the correct secondary voltage at the output of the Transformer.
Primary Line Fuses
The Primary Line Fuses protect the power supply from catastrophic failures.
Power Transformer
The power transformer reduces the input voltage to 22V AC (nominal).