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Control Circuit
The control logic uses a Field Programmable Gate Array as the "brain" of the 2250. This system interprets all of the
inputs and delivers the correct corresponding outputs.
Every operation of the unit is controlled from this system.
A System Clock Circuit, composed of an oscillator, provides the basic operating frequency of 10 MHz.
The Reset Circuit provides a single pulse at the time the 2250 is turned on. This pulse resets Field Programmable
Gate Array to ensure proper operation.
Power Factor Correction Circuit (PFC)
The Power Factor Correction Circuit ensures lower power consumption. The circuit is used to correct the power load
that is distributed to the unit's capacitors, providing the lowest voltage required for proper operation of the unit. The
PFC also regulates the universal input of 100 to 240 watt voltages that power the unit.
Power Supply
The Aaron 2250 incorporates a medically approved 40W Quad output power supply. +12VDC, 5VDC, -12VDC,
3.3VDC, and 5VDC are generated by this power supply. These voltages are used by the main and display board to
supply power to all logic circuits.
Switch Mode Power Supply Circuit (SMPS)
This circuit generates the high current voltage necessary to deliver the output power.
Auxiliary Relay
The Auxiliary Relay Circuit is used to control the relay connection on the rear of the unit. During activation of any
mode, a signal is sent to this circuit to close the contact of a relay. The relay remains closed for a period of 3 seconds
after an activation request has been terminated. The circuit is made up of a relay driver and a relay.
Speaker Circuit
The audio circuit is used by the system logic to generate activation tones and alarm tones. Volume for the activation
tones may be adjusted from the back panel of the unit.
NOTICE:
Alarm volume cannot be adjusted up or down.
RF Drive
The RF Drive Circuit is adjusted by the control logic to regulate the desired output power and waveforms.
HV Relay
The High Voltage (HV) Relay Circuits are used by the control logic to switch the power to the proper outputs, redi-
recting the RF power to the appropriate source of activation accessed by an auxiliary accessory on the unit
Output
The Output Circuit controls the unit's stage of operation that produces high voltage, high frequency generated power.
Sense and Backup Sense Circuits
This circuit combines both the Sense and Backup circuits into one signal that controls the unit's output power.
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Aaron Medical
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Table of Contents
Troubleshooting
