Power Supply/RF Board
Principles of Operation
Force EZ-C Series Service Manual
5-17
Power Supply/RF Board Interfaces
The Power Supply/RF board interfaces to other boards and generator components:
•
Control board
•
Footswitch board
•
heat sink components (RF damping resistors and the RF MOSFET)
•
a series of single wire attachment points for connecting the sense transformers
•
low voltage power supply (AC input and output)
A series of fuse clips connect the RF outputs and other front panel interfaces (i.e.,
REM and handswitching signals). The fuse clips mate to lugs located in the output
portion of the front panel assembly.
High Voltage Power Supply
The high voltage power supply contains several circuits:
•
the power entry circuitry
•
auto mains switching circuitry
•
AC/DC conversion circuitry
•
a DC/DC switching regulator
Power Entry Circuit
The power entry circuit consists of several items:
•
an integral three-wire power cord receptacle
•
a fuse drawer
•
an EMI filter
•
a separate power switch
The receptacle/filter reside on the rear panel of the generator; the power switch,
on the front panel. AC line fuses are changeable from the rear of the generator.
Warning
Potentially lethal AC and DC voltages are present in the AC line circuitry, high
voltage DC circuitry, and associated mounting and heat sink hardware described
in this manual. They are not isolated from the AC line. Take appropriate
precautions when testing and troubleshooting this area of the generator.
