Bovie Aaron 1250, Service Manual, Page: 38 / 68

BLOCK DIAGRAM
Figure 4-1 Functional block diagram of the Aaron 1250 system
FUNCTIONAL OVERVIEW OF KEY CIRCUITS
The following descriptions highlight the main circuits in the Aaron 1250 Electrosurgical Generator.
High Voltage DC Supply
The unit incorporates a high voltage power supply to generate the RF output power. The high voltage power supply
delivers an unregulated DC output for the RF output. The nominal DC voltage from the high voltage power supply is
87 VDC ± 5V.
Low Voltage DC Supplies
The unit incorporates four regulated low voltage levels to control generator operations. They are: 15 VDC, 12 VDC,
8 VDC, and 5 VDC.
• The 15 VDC circuit supplies power for all of the request sense circuits, the switching of the mode relays and the
audio circuit.
• The 12 VDC circuit supplies power for the patient electrode sense module.
• The 8 VDC circuit supplies power for the RF drive circuit. This circuit turns on and off the power MOSFETS for
the RF output power.
• The 5 VDC circuit supplies power for the logic system, and all of the displays and indicators.
38 Bovie / Aaron Medical