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Troubleshooting
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Summary of Contents for Bovie AARON 1250
- Page 1 SERVICE GUIDE Service Guide • Aaron 1250...
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Page 2: Preface
The Aaron 1250 was constructed with the highest quality components, and was built in a registered environment. In the unlikely event that your generator fails within 1 year of purchase date, Bovie / Aaron Medical will warranty the product and effect factory repairs. Please refer to Appendix A Warranty for what is covered, how long, and “How to Receive a Return Authorization Number”. -
Page 3: Safety Precautions When Operating The Generator
There is no substitute for a properly trained and vigilant medical staff. It is important that they read, understand, and follow the operating instructions supplied with this electrosurgical equipment. To promote the safe use of the Aaron 1250 Electrosurgical Generator, please refer to the User’s Guide for standard operating precautions. -
Page 4: Table Of Contents
Applicable Safety Standards ....................3 Conventions Used in this Guide ...................3 List of Figures .........................7 List of Board Drawings and Schematics ................7 Section 1. The Aaron 1250 Electrosurgical Generator Functional Description ......................10 Unit Description ........................11 Safety Precautions when Repairing the Generator ..............11 General Warnings, Cautions, and Notices ..............11... - Page 5 Service Personnel Safety .......................46 Installation and Placement ....................47 Functional (Operational) Checks ..................47 How to Set Up and Start the Aaron 1250 Unit ..............47 How to Check the Patient Return Electrode Alarm Function ..........47 How to Check the Bipolar Mode (with Footswitch) ............48 How to Check the Monopolar Mode (with Footswitch) .............48...
- Page 6 Responsibility of the Manufacturer ..................64 Returning the Generator for Service ...................64 Obtain a Return Authorization Number ................64 Clean the Generator ......................64 Ship the Generator .......................64 Appendix A. Warranty ......................65 Appendix B. Board Drawings and Schematics ..............67 Bovie / Aaron Medical...
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Page 7: List Of Figures
Figure 3-13 Coagulation mode waveform ................35 Figure 3-14 Fulguration mode waveform ................35 Figure 3-15 Bipolar mode waveform ...................36 Figure 4-1 Functional block diagram of the Aaron 1250 system ........38 Board Drawings and Schematics Schematic 1 Main board .....................69 Schematic 2 Power Supply ....................70 Schematic 3 RF Amplifier Circuit ..................71... - Page 8 Bovie / Aaron Medical...
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Page 9: Section 1. The Aaron 1250 Electrosurgical Generator
THE AARON 1250 ELECTROSURGICAL GENERATOR This section includes the following information: Functional Description Unit Description Safety precautions when Repairing the Generator General Warnings, Cautions, and Notices Active Accessories Fire/Explosion Hazards Generator Electric Shock Hazards Servicing Cleaning CAUTION Read all warnings, cautions, and instructions provided with this generator before using. -
Page 10: Functional Description
FUNCTIONAL DESCRIPTION The Aaron 1250 is a multipurpose electrosurgical generator for use in physician’s offices and surgi-centers. It provides unsurpassed performance, flexibility, reliability, and user convenience in one compact package. The Aaron 1250 Electrosurgical Generator includes digital technology. This new technology is evident in the self- checking circuitry and error code readouts. -
Page 11: Unit Description
UNIT DESCRIPTION The Aaron 1250 electrosurgical generator is a self-contained unit, consisting of the main enclosure and power cord. The main components incorporated in the generator include: • FRONT PANEL COMPONENTS Power switch; two dials for controlling power output; membrane switches for selecting modes;... -
Page 12: Fire / Explosion Hazards
High frequency, high voltage signals that can cause severe burns are present in the RF output stage and in the associated mounting and heat sink hardware. Take appropriate precautions when testing and troubleshooting this area of the generator. Bovie / Aaron Medical... -
Page 13: Servicing
After installing a new low voltage power supply, verify that the voltages are correct. Cleaning NOTICE Do not clean the generator with abrasive cleaning or disinfectant compounds, solvents, or other materials that could scratch the panels or damage the generator. Service Guide • Aaron 1250... - Page 14 Bovie / Aaron Medical...
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Page 15: Section 2. Controls, Indicators, And Receptacles
CONTROLS, INDICATORS, AND RECEPTACLES This section describes the front and rear panels, including all controls, indicators, receptacles, the fuse drawer, and ports. Service Guide • Aaron 1250... -
Page 16: Front Panel
FRONT PANEL Figure 2-1 Layout of controls, indicators, and receptacles on the front panel Bovie / Aaron Medical... -
Page 17: Controls And Indicators Overview
CONTROLS AND INDICATORS OVERVIEW Users may control most Aaron 1250 functions from the front panel. Each Control is plainly marked and colored on the front panel for quick reference. Volume control and a footswitch connector are located on the rear panel. -
Page 18: Cut And Blend Controls
Audible Indicators An activation tone sounds whenever the Aaron 1250 Electrosurgical Generator is activated. The volume may be adjusted up or down on the rear of the unit. -
Page 19: Coag And Bipolar Controls
Bipolar Selector Coag and Bipolar Power Control Dial Bipolar Indicator When pressed, selects Illuminates when Increases or decreases the Coag or Bipolar the Bipolar Mode. Bipolar Mode power output in increments of 1 watt. is selected. Service Guide • Aaron 1250... -
Page 20: Indicators
Illuminates when the system Illuminates when the system Illuminates when the system When pressed, toggles detects a split plate. detects a single plate. detects a patient return between monopolar electrode alarm condition. and bipolar foot control. Bovie / Aaron Medical... -
Page 21: Power Switch And Receptacles
Power On/Off Switch Monopolar Footswitching Receptacle Bipolar Receptacle Turns the unit on or off. Accepts cables or adapters equipped Accepts standard cables with standard (Bovie #12) active plugs. for bipolar handpieces. Connect footswitching accessories. Service Guide • Aaron 1250... -
Page 22: Symbols On The Front Panel
Power Switch and Handpiece Connectors Read instructions before use. Type BF (Defibrillator – Proof) Equipment Patient Return Electrode RF isolated – patient connections are isolated from earth at high frequency. Caution High Voltage Monopolar Output Bipolar Output Bovie / Aaron Medical... -
Page 23: Rear Panel
Non-ionizing Radiation Volume Control Danger - Explosion Risk If Used With Flammable Anesthetics. Fuse Enclosed Relay Connector Footswitch Input Jack Read Instructions Before Use Do not dispose of this device in the unsorted municipal waste stream. Service Guide • Aaron 1250... - Page 24 Bovie / Aaron Medical...
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Page 25: Section 3. Technical Specifications
110-120 Volt 220-240 Volt Mains line frequency range (nominal): Mains line frequency range (nominal): 60 Hz 50 Hz Power consumption: 540 VA Power consumption: 540 VA Fuses (2): 5A (Slow Blow) Fuses (2): 3.15A (Slow Blow) Service Guide • Aaron 1250... -
Page 26: Duty Cycle
Alarm tones meet the requirements for IEC 60601-2-2. Activation Tone Volume (adjustable) 45 to 65 dBa Frequency Cut: 1 kHz Blend: 1 kHz Coagulation: 2 kHz Fulguration: 2 kHz Bipolar: 2 kHz Duration Continuous while the generator is activated Bovie / Aaron Medical... -
Page 27: Patient Return Electrode Sensing
Reverse polarity, ground open: < 50 μA Sink current at high line, all inputs < 50 μA High Frequency (RF) Leakage Current Bipolar RF leakage current < 39 mA Monopolar RF leakage current (additional tolerance) < 150 mA Service Guide • Aaron 1250... -
Page 28: Standards And Iec Classifications
The Aaron 1250 Electrosurgical Generator complies with the appropriate IEC 60601-1-2 and IEC 60601-2-2 specifications regarding electromagnetic compatibility. Voltage Transients (Emergency Generator Mains Transfer) The Aaron 1250 Electrosurgical Generator operates in a safe manner when the transfer is made between line AC and an emergency generator voltage source. OUTPUT POWER CHARACTERISTICS Maximum Output for Bipolar and Monopolar Modes Power readouts agree with actual power into rated load to within 20% or 5 watts, whichever is greater. -
Page 29: Output Power Curves
Figure 3 – 1 Output power versus impedance for Cut mode Load Resistance (ohms) Figure 3 – 2 Peak voltage vs. power setting for Cut mode Output Power Setting (watts) Service Guide • Aaron 1250... -
Page 30: Figure 3-3 Output Power Vs. Impedance For Blend Mode
Figure 3 – 3 Output power versus impedance for Blend mode Load Resistance (ohms) Figure 3 – 4 Peak voltage vs. power setting for Blend mode Output Power Setting (watts) Bovie / Aaron Medical... -
Page 31: Monopolar Coag Curves
These measurements were taken using short (< 0.5 meter) leads. Figure 3 – 5 Output power versus impedance for Coagulation mode Load Resistance (ohms) Figure 3 – 6 Peak voltage vs. power setting for Coagulation mode Output Power Setting (watts) Service Guide • Aaron 1250... -
Page 32: Figure 3-7 Output Power Vs. Impedance For Fulguration Mode
Figure 3 – 7 Output power versus impedance for Fulguration mode Load Resistance (ohms) Figure 3 – 8 Peak voltage vs. power setting for Fulguration mode Output Power Setting (watts) Bovie / Aaron Medical... -
Page 33: Bipolar Curves
Bipolar Curves Figure 3 – 9 Output power versus impedance for Bipolar mode Load Resistance (ohms) Figure 3 – 10 Peak voltage vs. power setting for Bipolar mode Output Power Setting (watts) Service Guide • Aaron 1250... -
Page 34: Reference Output Waveforms
Reference Output Waveforms The following figures are the output waveforms as viewed on an oscilloscope. Figure 3-11 Cut mode waveform Figure 3-12 Blend mode waveform Bovie / Aaron Medical... -
Page 35: Figure 3-13 Coagulation Mode Waveform
Figure 3-13 Coagulation mode waveform Figure 3-14 Fulguration mode waveform Service Guide • Aaron 1250... -
Page 36: Figure 3-15 Bipolar Mode Waveform
Figure 3-15 Bipolar mode waveform Bovie / Aaron Medical... -
Page 37: Section 4. Theory Of Operation
THEORY OF OPERATION This section includes the following information: Block diagram Functional overview of key circuits System logic Aaron 1250 control signal inputs and outputs. Service Guide • Aaron 1250... -
Page 38: 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. -
Page 39: Dc Supply Check Circuit
When you connect a single plate patient return electrode to the unit, the Pad Sensing Module will detect if the resist- ance is below 5 Ω. If it is, the Aaron 1250 will display the green single plate LED on the front of the unit. -
Page 40: Rf Amplifier Circuit
Monopolar Select Circuit The monopolar select circuit is used to switch the Aaron 1250 between each of the four-monopolar modes. Selection of the modes is accomplished through the matrix switches on the front panel. High voltage relays are used to switch and isolate the four-monopolar configurations one from the other. -
Page 41: Aaron 1250 Control Signal Inputs And Outputs
AARON 1250 CONTROL SIGNAL INPUTS AND OUTPUTS The following table lists the important input and output signals. From a troubleshooting standpoint, the absence (and presence) of these signals will help you isolate problems. Signal Name Description PAD_SNS_ERROR This is the input signal from the Pad Sense Module that informs the system logic that a pad sensing error has occurred. - Page 42 If the line voltage is within normal operating parameters a logic 1 (5 VDC) is sent to the system logic. If the line voltage increase by more than 30% a logic 0 (0 VDC) is sent to the system logic. Bovie / Aaron Medical...
- Page 43 Foot B refers to the Coag pedal on the footswitch. This signal is generated by a colpitts oscillator located on the main board. When an activation request is made, this oscillator becomes a logic 1 (5 VDC) signal. Service Guide • Aaron 1250...
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Page 45: Section 5. Operating The Aaron 1250
OPERATING THE AARON 1250 This section covers the following topics: Inspecting the generator and accessories Service personnel safety Installation and placement Functional (operational) checks Operating the unit. Service Guide • Aaron 1250... -
Page 46: Inspecting The Generator And Accessories
INSPECTING THE GENERATOR AND ACCESSORIES Before each use of the Aaron 1250 Electrosurgical Generator, inspect the unit and all accessories to verify good working order: • Inspect for physical damage to the Electrosurgical Generator and its connections. • Verify that the appropriate accessories and adapters are present. -
Page 47: Installation And Placement
INSTALLATION AND PLACEMENT Place the Aaron 1250 Electrosurgical Generator on any flat surface with a tilt angle of not more than 10 degrees. The unit relies on natural convection cooling. Do not block the rear vents. Ensure that air flows freely on all sides of the unit. -
Page 48: How To Check The Bipolar Mode (With Footswitch)
How to Check the Monopolar Mode (with Handswitch) 1. Connect a handswitching handpiece to the Monopolar Handswitching receptacle. 2. Activate, one at a time, the Cut and Coag handswitching controls. Verify that each control causes the correct indicator and tone to sound. Bovie / Aaron Medical... -
Page 49: Operating The Unit
On This Device… Monopolar Cut or Blend Modes Yellow Button Handswitching Pencil Yellow Pedal Footswitch Coagulation or Fulguration Modes Blue Button Handswitching Pencil Blue Pedal Footswitch Bipolar Any Bipolar Yellow (Cut) or Blue (Coag) Pedal Footswitch Service Guide • Aaron 1250... - Page 50 Bovie / Aaron Medical...
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Page 51: Section 6. Maintenance
MAINTENANCE This section includes the following information: Cleaning the unit Performing periodic inspection Replacing fuses. Service Guide • Aaron 1250... -
Page 52: Cleaning The Unit
Do not allow fluids to enter the chassis. Do not sterilize the generator. PERFORMING PERIODIC INSPECTION Every six months, visually inspect the Aaron 1250 for signs of wear or damage. In particular, look for any of the following problems: • Damage to the power cord •... -
Page 53: Section 7. Troubleshooting
TROUBLESHOOTING This section includes error code descriptions and actions to take to resolve them. Service Guide • Aaron 1250... -
Page 54: Recommended Equipment For Troubleshooting
• If an error code was displayed, take the appropriate action(s) to correct the error condition. Inspecting the Generator If the Aaron 1250 malfunctions, check for obvious conditions that may have caused the problem. 1. Check the generator for visible signs of physical damage. -
Page 55: Inspecting Internal Components
3. Visually inspect and verify that all connectors are firmly seated. 4. Inspect each board for damaged components, wires, cracks and corrosion. 5. Reinstall the cover by positioning the cover over the chassis, and securing the four screws. Service Guide • Aaron 1250... -
Page 56: Understanding Error Codes And Audio Tones
UNDERSTANDING ERROR CODES AND AUDIO TONES The Aaron 1250 Electrosurgical Generator includes automatic, perpetual, self-diagnostics. If the diagnostics detect an error, the system displays an error code, sounds an audible tone, and deactivates the output power. Any errors detected will shut down the RF output power. -
Page 57: Correcting Common Problems
Loose or disconnected cable between Check / connect ribbon cable from the main main board and display board board to the display board. Main board malfunction Replace the main board. Display board malfunction Replace the display board. Service Guide • Aaron 1250... - Page 58 If they are not, check the relay drivers. Footswitch will not activate output. Malfunctioning or damaged footswitch Replace the Footswitch connector assembly. receptacle Footswitch activation signal lost on Replace the main board. main board Bovie / Aaron Medical...
- Page 59 Some manufacturers offer RF choke filters for use in monitor leads. The filters reduce interference when the generator is activated and minimize the potential for an electrosurgical burn at the site of the monitor electrode. Service Guide • Aaron 1250...
- Page 60 Use a lower power setting for the Fulgurate mode or select the Coagulation mode. Abnormal 50 Hz - 60 Hz leakage Inside the generator, carefully inspect for currents damage that may cause shorting between the AC line voltage and connected patient components. Bovie / Aaron Medical...
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Page 61: Main Board Test Points
12 VOLT DC POWER SUPPLY TP6 (+8 VDC) 8 VOLT DC POWER SUPPLY TP7 (LVGND) LOW VOLTAGE GROUND TP8 (+5 VDC) 5 VOLT DC POWER SUPPLY DISPLAY BOARD TEST POINTS Test Point Description DIGITAL GROUND NOT USED NOT USED Service Guide • Aaron 1250... - Page 62 Bovie / Aaron Medical...
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Page 63: Section 8. Repair Policy And Procedures
REPAIR POLICY AND PROCEDURES Refer to this section for information on Responsibility of the manufacturer Returning the generator for service Service Guide • Aaron 1250... -
Page 64: Responsibility Of The Manufacturer
For warranty information, refer to APPENDIX A - WARRANTY. RETURNING THE GENERATOR FOR SERVICE Before you return the generator, call your Bovie Aaron Medical representative for assistance. If instructed to send the generator to Bovie Aaron Medical, first obtain a Returned Goods Authorization Number. Then clean the Generator and ship it to Bovie Aaron Medical for service. -
Page 65: Appendix A. Warranty
WARRANTY Bovie Aaron Medical warrants each product manufactured by it to be free from defects in material and workmanship under normal use and service for the period(s) set forth below. Aaron Medical’s obligation under this warranty is limited to the repair or replacement, at its sole option, of any product, or part thereof, which has been returned to it or its Distributor within the applicable time period shown below after delivery of the product to the original purchaser, and which examination discloses, to Aaron Medical’s... - Page 66 Aaron Medical, its dealers, and representatives reserve the right to make changes in equipment built and/or sold by them at any time without incurring any obligation to make the same or similar changes on equipment previously built and/or sold by them. Bovie / Aaron Medical...
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Page 67: Appendix B. Board Drawings And Schematics
BOARD DRAWINGS AND SCHEMATICS This supplement contains the assembly drawings and schematics for the following printed circuit boards: Control board Display board Footswitch board Power Supply/RF board. Service Guide • Aaron 1250... - Page 68 Our trained staff will verify the part numbers and arrange immediate delivery. The Technical Service Department can relay cost information, determine parts availability, and suggest any assembly updates available. AARON 1250 DESIGN BREAKDOWN & DRAWING REFERENCE PCB BOARD ASSEMBLIES Description...
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