Model 940 Service Guide Rev 0

SAFETY PRECAUTIONS WHEN OPERATING THE GENERATOR The safe and effective use of electrosurgery depends to a large degree on factors solely under the control of the operator. 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 940, please refer to the User’s Guide for standard operating precautions.

APPLICABLE SAFETY STANDARDS CAN/CSA C22.2, NO. 601.1 - M90 UL 60601-1 (Ed. 1 Rev. 2006) Part 1 IEC 60601 - 2 - 2 (Ed. 4 Rev. 2006) Part 2-2 IEC 60601 - 1 - 2 (Ed. 4 Rev. 2001) Part 1-2 IEC 60601 - 1 (Ed. 2 Rev. 1998) Part 1 CENELEC EN 60601 - 1 (Issue 1990) Part 1

CONVENTIONS USED IN THIS GUIDE WARNING: Indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION: Indicates a hazardous situation which, if not avoided, may result in minor or moderate injury.

NOTICE: Indicates an operating tip, a maintenance suggestion, or a hazard that may result in product damage.

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TABLE OF CONTENTS Equipment Covered in this Manual...ii For Information Contact ...ii Safety Precautions When Operating the Generator ...iii Applicable Safety Standards...iii Conventions Used in this Guide ...iii The Aaron 940 ...1-1 Functional Description...1-2 Unit Description...1-3 Safety Precautions when Repairing the Aaron 940 ...1-3 General Warnings, Cautions, and Notices ...1-3 Active Accessories ...1-4 Fire / Explosion Hazards ...1-4 Generator Electric Shock Hazards...1-5 Servicing...1-5 Cleaning ...1-5 Controls, Indicators and Receptacles...2-1 Front Panel...2-2 Controls and Indicators Overview ...2-3 Coagulation and Bipolar Controls ...2-4 Accessory Receptacles...2-5 Front and Rear Panel Views ...2-6 Symbols...2-7 Technical Specifications ...3-1 Performance Characteristics...3-1 Input Power ...3-1 Duty Cycle ...3-2 Dimensions and Weight ...3-2 Operating Parameters ...3-2 Transport and Storage ...3-2 Audio Volume ...3-2 Low Frequency (50-60 Hz) Leakage Current...3-3 High Frequency (RF) Leakage Current...3-3 Standards and IEC Classifications...3-3 Class I Equipment (IEC 60601-1) ...3-3 Type CF Equipment (IEC 60601-1) / Defibrillator Proof...3-3 Drip Proof (IEC 60601-2-2) ...3-3 Electromagnetic Compatibility (IEC 60601-1-2 and IEC 60601-2-2) ...3-3 EMC Compliance ...3-4 Output Power Characteristics ...3-8 Maximum Output for Monopolar and Bipolar Modes ...3-8 Theory Of Operation ...4-1 Block Diagram...4-2 Functional Overview of Key Circuits ...4-2 System Logic...4-4 Aaron 940 Control Signals ...4-4

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Operating the Aaron 940 ...5-1 Inspecting the Generator and Accessories ...5-2 Service Personnel Safety...5-2 Installation ...5-3 Functional Checks...5-3 Unit Operations ...5-5 Maintenance...6-1 Cleaning ...6-2 Periodic Inspection...6-2 Fuse Replacement ...6-2 Troubleshooting ...7-1 Recommended Equipment...7-2 Troubleshooting the Aaron 940 ...7-4 Inspecting the Unit...7-2 Inspecting the Receptacles ...7-2 Inspecting Internal Components...7-4 Understanding Error Codes and Audio Tones...7-4 Correcting Common Problems...7-5 Main Board Test Points ...7-8 Return Policy and Procedures...8-1 Responsibility of Manufacturer...8-2 Returning the Unit for Service...8-2 Warranty ...A-1 Board Drawings, Schematics, & Assemblies ...B-1 How to Order Parts from Bovie Medical ...B-2 Aaron 940 Design Breakdown and Drawing Reference...B-2 Bovie Drawing and Schematic Package...B-3

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LIST OF FIGURES Figure 2 – 1 Figure 2 – 2 Figure 2 – 3 Figure 2 – 4 Figure 3 – 1 Figure 3 – 2 Figure 3 – 3 Figure 3 – 4 Figure 3 – 5 Figure 4 – 1 Figure 5 – 1 Figure 5 – 2 Figure 6 – 1

Layout of controls, indicators, and receptacles on the front panel...2-2 Controls for the cut, blend, and coag modes ...2-4 Location of the front panel receptacles and power switch ...2-5 Layout of controls and labeling on the rear and side panels ...2-6 Output power versus power setting for all modes...3-8 Output Power versus Load • Bipolar 100% / 50% ...3-8 Bipolar Mode waveform ...3-8 Output Power versus Load • Monopolar 100% / 50% ...3-9 Monopolar Mode waveform...3-9 Functional block diagram of the Aaron 940 system ...4-2 Installation and placement...5-3 Unit setup ...5-4 Fuse...6-2

SCHEMATICS AND BOARD DRAWINGS Main Board...B-3 Logic Center...B-4 RF Amplifier Circuit ...B-5 Request Activation Sense Circuit (Hand and Foot) ...B-6 Power Supply...B-7 Request Up Sense Circuit ...B-8 Request Down Sense Circuit...B-9 Power Factor Corrector Power Supply ...B-10 Power Factor Corrector Power Supply - High Voltage PFC...B-11 Power Factor Corrector Power Supply - Mains Filter ...B-12 Power Factor Corrector Power Supply - Low Power SMPS ...B-13 Printed Circuit Board Main...B-14 Printed Circuit Board PFC ...B-15 A940 Assembly ...B-16

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THE AARON 940 HIGH FREQUENCY DESICCATOR 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. Read the instructions, warnings, and cautions provided with electrosurgical accessories before using. Specific instructions are not included in this manual.

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FUNCTIONAL DESCRIPTION

The Aaron 940 is a multipurpose High Frequency Desiccator for use in physician’s offices and surgi-centers. It provides unsurpassed performance, flexibility, reliability, and user convenience in one compact package. The Aaron 940 High Frequency Desiccator includes digital technology. This new technology is evident in the selfchecking circuitry and error code readouts. The unit offers monopolar and bipolar electrosurgical operations. The following are Aaron 940 key advantages and benefits. Power Capabilities Memory Self Diagnostics

Up to 40 watts of Coagulation @ 1000 Ω. Up to 40 watts of Bipolar @ 200 Ω.

The generator automatically powers up to the last power setting.

These diagnostics continually monitor the unit to ensure proper performance. Whenever they detect a problem, medical personnel receive audible and visual alarm responses, and the output is suspended until the alarm condition is cleared.

UNIT DESCRIPTION

The Aaron 940 High Frequency Desiccator is a self-contained unit, consisting of the main enclosure and power cord. The main components incorporated in the generator include: • FRONT PANEL COMPONENTS Dial for controlling power output; receptacles for connecting electrosurgical accessories; footswitch receptacle; and 7-segment display. • REAR PANEL COMPONENTS Volume control.

• OTHER COMPONENTS Power switch (located on side of unit); power cable receptacle (located on bottom of unit); connector to A901 pencil. • INTERNAL COMPONENTS Main PCB and Power Factor Corrector PCB.

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SAFETY PRECAUTIONS WHEN REPAIRING THE GENERATOR

Before servicing the Aaron 940 High Frequency Desiccator it is important that you read, understand, and follow the instructions supplied with it. Also, be familiar with any other equipment used to install, test, adjust, or repair this generator.

General Warnings, Cautions, and Notices WARNING The instrument receptacles on this generator are designed to accept only one instrument at a time. Do not attempt to connect more than one instrument at a time into a given receptacle. Doing so will cause simultaneous activation of the instruments.

CAUTIONS Do not stack equipment on top of the generator or place the generator on top of electrical equipment. These configurations are unstable and/or do not allow adequate cooling. Unit is designed to be wall mounted or mounted on a mobile stand. Provide as much distance as possible between the electrosurgical generator and other electronic equipment (such as monitors). An activated electrosurgical generator may cause electrical interference with them. Do not turn the activation tone down to an inaudible level. The activation tone alerts the surgical team when an accessory is active.

NOTICES Connect the power cord to a wall receptacle having the correct voltage. Otherwise, product damage may result.

Active Accessories WARNINGS Shock Hazard – Do not connect wet accessories to the generator. Shock Hazard – Ensure that all accessories and adapters are correctly connected and that no metal is exposed.

CAUTIONS Accessories must be connected to the proper receptacle type. In particular, bipolar accessories must be connected to the Bipolar Instrument receptacle only. Improper connection may result in inadvertent generator activation. Set power levels to the lowest setting before testing an accessory.

NOTICES To avoid incompatibility and unsafe operation, we recommend using only Aaron accessories. During bipolar electrosurgery, do not activate the generator until the forceps have made contact with the patient. Product damage may occur.

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Fire / Explosion Hazards WARNINGS Explosion Hazard – Do not install the generator in the presence of flammable anesthetics, gases, liquids, or objects. Fire Hazard – Do not place active accessories near or in contact with flammable materials (such as gauze or surgical drapes). Electrosurgical accessories that are activated or hot from use can cause a fire. Use a holster to hold electrosurgical accessories safely away from personnel and flammable materials. Fire Hazard – Do not use extension cords. Fire Hazard – For continued protection against fire hazard, replace fuses only with fuses of the same type and rating as the original fuse.

Generator Electric Shock Hazards WARNINGS Connect the generator power cord to a properly grounded receptacle. Do not use power plug adapters. Do not connect a wet power cord to the generator or to the wall receptacle. To allow stored energy to dissipate after power is disconnected (caps discharge) wait at least five minutes before replacing parts. Always turn off and unplug the generator before cleaning. Do not touch any exposed wiring or conductive surfaces while the generator is disassembled and energized. Never wear a grounding strap when working on an energized generator. When taking troubleshooting measurements use appropriate precautions such as using isolated tools and equipment, using the “one hand rule,” etc. 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. These potentials are not isolated from the AC line. Take appropriate precautions when testing and troubleshooting this area of the generator. 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.

Servicing CAUTIONS Read all warnings, cautions, and instructions provided with this generator before servicing. The generator contains electrostatic-sensitive components. When repairing the generator, work at a static-control workstation. Wear a grounding strap when handling electrostatic-sensitive components, except when working on an energized generator. Handle circuit boards by their nonconductive edges. Use an anti-static container for transport of electrostatic-sensitive components and circuit boards.

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.

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CONTROLS, INDICATORS, AND RECEPTACLES This section describes the front, rear, and side panels, including all controls, indicators, receptacles, and ports.

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FRONT PANEL Figure 2 – 1 Layout of controls, indicators, and receptacles on the front panel

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CONTROLS AND INDICATORS OVERVIEW Users may control most Aaron 940 functions from the front panel. Each Control is plainly marked on the front panel for quick reference. The volume control is located on the rear panel. Normal operations involve activating the generator with either a front connected handswitch or footswitch. The following components are the User Interface for the Aaron 940 High Frequency Desiccator: Power Switch

The rocker ON/OFF switch on the lower right corner. The switch turns power on and off to the unit.

Power Control Knob

This rotary knob allows you to select the desired RF power level for all modes of operation. The Power Control Knob moves at a graduated .1 watt per notch (incrementally) up to 10 watts and 1 watt per notch up from 10 to 40 watts.

Watts Display

The large power output display reports the generator’s output power setting from .1 to 40 watts.

Visual LED Indictors

The blue activation indicator reports when the unit is activated.

Audible Indicators

An activation tone sounds whenever the Aaron 940 High Frequency Desiccator is activated. The volume may be adjusted to a high or low setting. The volume adjustment is located on the rear of the unit. An alarm siren sounds during all alarm conditions. The volume of this alarm cannot be adjusted.

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COAGULATION AND BIPOLAR CONTROLS Figure 2 – 2 Controls for the cut, blend, and coag modes

Coag and Bipolar Power Display (watts) Indicates the power set for Coag or Bipolar.

Coag and Bipolar Activation Indicator Illuminates when you activate Coag or Bipolar.

Active

Power Control

Coag and Bipolar Power Control Dial Increases or decreases the Coag or Bipolar power output.

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ACCESSORY RECEPTACLES Figure 2 – 3 Location of the front panel receptacles and power switch

Power Switch Powers the unit on or off.

Monopolar Handswitching Receptacle Accepts only Aaron handpieces.

Bipolar Receptacle Accepts only Aaron cables for bipolar handpieces.

Footswitching Receptacle Accepts only Aaron footswitch.

Handpiece Holder Securely holds Aaron handpiece when not in use.

Patient Return Electrode Receptacle Accepts only Aaron return electrode plugs designed for the A940.

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REAR AND SIDE PANEL VIEWS Figure 2 – 4 Layout of controls and labeling on the rear and side panels

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SYMBOLS ON THE FRONT, SIDE AND REAR PANELS The following table lists descriptions for symbols found on the Aaron 940 Caution: Jack location is a source of dangerous voltage.

Caution: Read directions for use prior to using equipment.

On (power: connection to the mains).

Off (power: disconnection from the mains).

Do not dispose of this device in the unsorted municipal waste stream.

Monopolar output jack (hand control pencil jack).

Bipolar output jack.

Patient Plate, for use with Monopolar modes. (optional) Footswitch jack, for foot controlled activation of monopolar (optional) and bipolar devices. Type B Equipment.

Non-ionizing radiation.

Neutral Electrode referenced to earth.

Volume control.

Explosion Risk if used with flammable anesthetics.

Fuse Enclosed.

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TECHNICAL SPECIFICATIONS All specifications are nominal and subject to change without notice. A specification referred to as “typical” is within ± 20% of a stated value at room temperature (25° C / 77° F) and a nominal input power voltage.

PERFORMANCE CHARACTERISTICS Input Power Input Voltage

100-240 VAC ~ ± 10%

Mains line frequency range (nominal):

50 – 60 Hz

Power consumption:

75 VA

Fuses (two):

1.0 A 250 VAC

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Duty Cycle Under maximum power settings and rated load conditions (Coagulation 40 W @ 1000 Ω load), the generator is suitable for activation times of 10 seconds on, 30 seconds off for one hour. NOTICE The internal temperature of the unit is constantly being monitored. If the temperature rises above 85°C an alarm sounds, the system displays an error code, and the system disables output power.

Dimensions and Weight Width

11.4 cm (4.5 in.)

Depth

11.4 cm (4.5 in.)

Height

16 cm (6.3 in.)

Weight

< 1.4 kg (< 3 lbs.)

Operating Parameters Ambient temperature range

10° to 40° C (50° to 104° F)

Relative humidity

30% to 75%, non-condensing

Atmospheric pressure

700 hPa to 1060 hPa

Warm-up time

If transported or stored at temperatures outside the operating temperature range, allow one hour for the generator to reach room temperature before use.

Transport and Storage Ambient temperature range

-34˚ to 65˚ C (-29˚ to 149˚ F)

Relative humidity

0% to 75%, condensing during transport, non-condensing during storage

Atmospheric pressure

500 hPa to 1060 hPa

Audio Volume The audio levels stated below are for the activation tone (bipolar and monopolar) and the alarm tone at a distance of one meter. Audio levels meet the requirements for IEC 60601-2-2. Activation Tone Volume (adjustable)

40 to 65 dB

Frequency

All Modes: 833 Hz

Duration

Continuous while the generator is activated

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Alarm Tone Volume (adjustable)

40 – 60 dB

Frequency

1 kHz 1⁄2 seconds / 2 kHz 1⁄2 seconds

Duration

2 seconds

Low Frequency (50-60 Hz) Leakage Current Enclosure source current, ground open

< 300 µA

Source current, patient leads, all outputs

Normal polarity, intact ground: < 10 µA Normal polarity, ground open: < 10 µA Reverse polarity, ground open: < 10 µA

Sink current at high line, all inputs

< 10 µA

High Frequency (RF) Leakage Current Bipolar RF leakage current

< 45 mA rms at 40 watts

Monopolar RF leakage current (additional tolerance)

< 150 mA rms

STANDARDS AND IEC CLASSIFICATIONS Class I Equipment (IEC 60601-1) Accessible conductive parts cannot become live in the event of a basic insulation failure because of the way in which they are connected to the protective earth conductor.

Type BF Equipment (IEC 60601-1) The Aaron 940 High Frequency Desiccator provides a high degree of protection against electric shock, particularly regarding allowable leakage currents. It is type BF equipment.

Drip Proof (IEC 60601-2-2) The generator enclosure is constructed so that liquid spillage in normal use does not wet electrical insulation or other components which, when wet, are likely to affect adversely the safety of the generator.

Electromagnetic Interference When other Aaron equipment is placed on or beneath an activated Aaron Medical High Frequency Desiccator, the Aaron 940 High Frequency Desiccator operates without interference. The generator minimizes electromagnetic interference to video equipment used in the operating room.

Electromagnetic Compatibility (IEC 60601-1-2 and IEC 60601-2-2) The Aaron 940 High Frequency Desiccator complies with the appropriate IEC 60601-1-2 and IEC 60601-2-2 specifications regarding electromagnetic compatibility.

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