Electrosurgical Generator SERVICE MANUAL
Contents
1. 200 150 100 50 39 20 40 Output Power W 60 80 Printed Circuit Board Replacement Procedures 1 Serviceable components and assemblies can be replaced by following the procedures outlined in this section ESU Cover and Chassis Cover Fuses two in the Power Entry Module and one on the Motherboard Controller Board Power Conversion Board Heat sinks left center and right heat sinks and associated heat sink components Front Panel Display Low Voltage Power Supply Motherboard Footswitch Power Entry Module Electrical Shock Hazard To allow stored energy to dissipate after power is disconnected wait at least five minutes before replacing parts 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 antistatic container for transport of electrostatic sensitive components and circuit boards 40 For Service Centers and Megadyne trained facilities Additional information on assembly replacement is available on Mega Power Service and Repair Video Instruction 3000146 01 This instruction is in DVD format and can be viewed by opening InterVideo WinDVD on your personal computer and inserting the disk into the DVD drive Equip2. drawer to the module 44 Step 3 Removal Replacement of the Controller Board If it is determined in the Troubleshooting Section that the controller board needs replacing please follow the instructions below Disconnect the display board ribbon cable item B from the controller board by squeezing the sides of the connector item C and pulling straight up Unlock the controller board from the card guide by pressing the card lock item D toward the rear of the ESU Carefully slide the controller board straight up through the card guides to disconnect it from the motherboard Set the board aside in an antistatic container for reinstallation Repeat steps in reverse order to install Controller board VAO qua h w 8 l ad N AT 45 Step 4 Removal Replacement of the Power Conversion Board If it is determined in the Troubleshooting Section that the power conversion board needs replacing please follow the instructions below Remove one screw item A from associated heat sink Unlock the controller board from the card guide by pressing the card lock item C toward the rear of the ESU Carefully slide the power conversion board item B straight up through the card guides to disconnect if from the motherboard Set the power conversion board aside in an antistatic container for reinstallation Repeat steps in reverse order to install Power Conversion Board
3. 01 6020091 01 6020092 01 6020093 01 6020094 01 6020095 01 6020096 01 6020097 01 6020098 01 6020099 01 6020100 01 3750009 01 3750010 01 3750011 01 3750012 01 3750013 01 3750014 01 3750015 01 3750019 01 4600012 01 4600038 01 4600040 02 4600039 01 4600034 01 5600006 01 5600006 02 5600006 03 5600007 01 5600007 04 5600007 05 5600007 10 5600008 02 5600008 03 5600008 05 5600008 06 4600031 01 4600028 01 4600014 01 4600037 01 Glossary Active Electrode Bipolar Electrosurgery Capacitive Coupling Coagulation Contact Area w Mega 2000 Return Electrodes Current Cutting Direct Coupling 56 An electrosurgical instrument or accessory that concentrates the electric current at the surgical site Electrosurgery in which current flows locally between two electrodes that are positioned around a segment of tissue to create a surgical effect usually desiccation Current passes from one electrode through the desired tissue to the other electrode thus completing the circuit without entering any other part of the patient s body The passage of high frequency electrical current from one conductor to an adjacent conductor even though the conductors are separated by air or insulation The electrosurgical effect that results from heating due to high current density in the tissue causing cellular fluid to evaporate This disrupts the tissue structure shrinking the open vessels and creating a coagulum mass
4. 20 40 60 80 100 Power HF Maximum W 35 120 HF Voltage VP 3000 2500 2000 1500 1000 500 Standard Coag and Coag with Cut HF Voltage vs Output Power 0 10 30 60 90 Output Power W Spray Coagulation Output Power Graphs Spray Coag Output Power vs Load Resistance 140 120 100 120 W 80 Power W 60 60 W 40 20 0 500 1000 1500 2000 2500 Load Resistance Ohms 36 3000 120 Spray Coag Power Output vs Power Max RI 500 Ohms 140 120 100 80 60 Power HF Output W 40 20 4000 3500 3000 2500 HF Voltage Vp N o o oO 1500 1000 500 37 20 40 60 80 100 120 Power HF Maximum W Spray Coag HF Voltage vs Output Power 0 10 30 60 90 120 Output Power W Power HF Output W Bipolar Output Power Graphs 90 Power W 90 Bipolar Output Power vs Load Resistance 80 70 60 50 40 30 20 4 500 1000 1500 2000 Load Resistance Ohms Bipolar Power Output vs Power Max RI 100 Ohms 38 20 30 40 50 60 70 80 Power HF Maximum W 2500 HF Voltage Vp Bipolar HF Voltage vs Output Power 400 350 300 250
5. ALARM RECALL CURRENT METER Figure 7 1 POWER The power on off switch is located in the top left hand corner of the unit The unit is turned ON when the is depressed and the light above the switch illuminates The generator is turned OFF when the o is depressed and the light above the switch is extinguished 2 CUT The cut controls are color coded yellow The large numerical display indicates the power setting The arrow up key will increase power settings in one watt increments up to 40W and in increments of 5W thereafter to a maximum of 300W The arrow down key will decrease power settings in increments of five watts from 300W to 40W and in one watt increments thereafter Selecting the ACE key places the generator in the ACE Advanced Cutting Effect cut mode The ACE mode automatically controls the output power of the generator to provide the surgeon with a consistent cutting effect Little hemostasis is achieved in this mode In the ACE mode the light on the key will illuminate indicating that this mode is selected and the power display will show ACE Power can not be manually adjusted by using the up and down arrow keys Selecting the PURE key places the generator function into a standard cutting mode The light on the key will illuminate indicating that this mode is selected The standard cut or PURE mode allows the user to manually set desired power which is delivered during activ
6. Macro eee eees 14 Bipolar Current Monitor ee eee ee ee eens eee ease ee esas nennen 15 Bipolar and Return Patient Return Electrodes and Alarm 16 10 Rear Panel Controls Indicators and Receptacles 17 Volume Control Footswitch connections Power Cord Connection Grounding Lug Fuse Box 1 Calibration Ghack vacci aaa 18 12 Troubleshooting Error G0des ancas Girelli ea lieu 21 18 Monitor Interfarence aa 22 TA ETTORGOROS2254 tiranti aiar OI api eran 23 15 Technical Specifications Safety Compliance nennen 25 16 Output Power Characteristics nn ans 26 17 Declaration of Electromagnetic EMISSIONS een en nn nennen 28 18 APProved AGGESsornes un a ee 29 19 Power Curnve GraphS ile a een tiara 30 20 Printed Circuit Board Replacement Procedures ernennen 40 21 Parts USt a ne ee 55 DR OS SAN ea ne rn ian dda dd iii alii le ee li 56 23 ADDONGIX e A ainsi aa Safety Compliance Applicable Particular Requirements Electromagnetic Compliance Preface This service manual is for use only by qualified and trained personnel It is intended for servicing the Megadyne Mega Power Electrosurgical Generator only For clinical use of this system please refer to the Mega Power User s Manual Service Centers Shipping Instructions Maintenance Service It is recommended that maintenance cali
7. Power to 80 watts activate the Mega Power and Verify the output power is 80 Watts 16 watts using the ESU analyzer Both footswitch monopolar A amp B and hand activation monopolar A amp B should be tested Contact Quality Monitoring CQM Test This test requires test leads to connect to the CQM receptacle fixed load resistors and a variable load resistor 15 16 19 20 Turn on the Mega Power ESU the alarm should be red Attach a 50 ohm load across the two wires of the test lead Plug the CQM Test lead into the Patient Return Receptacle The alarm light should turn green Unplug the CQM Test lead from the ESU the alarm should sound and the light should turn red Attach a 150 ohm load across the two wires of the test lead Plug the CQM Test lead into the Patient Return Receptacle The alarm light should remain red Unplug the CQM Test lead from the ESU Attach a variable resistor set at 50 ohms across the two wires of the CQM test lead Plug the CQM Test lead into the Patient Return Receptacle The light should turn green 21 Adjust the variable resistor to increase the resistance until the alarm sounds and the light turns red Read the variable resistor it should be between 58 and 72 ohms Megadyne recommends a yearly calibration check of the Mega Power Electrosurgical Generator If your Mega Power is found to be out of calibration please send your system directly to Megadyne for calibration Contact Me
8. anesthetics or oxidizing gases such as nitrous oxide N20 and oxygen Non flammable agents should be used for cleaning and disinfection wherever possible Flammable agents used for cleaning or disinfecting or as solvents of adhesives should be allowed to evaporate before RF activation Cautery tips that are activated or hot during calibration or troubleshooting can cause a fire Do not place them near or in contact with flammable materials and substances Cautions The cautions given below pertain to testing calibration and servicing of the generator The service technician should also be aware of the cautions given in the user manual for clinical use of the generator Read all instructions prior to installation and operation Use properly grounded AC outlets when connecting the generator power cord Do not place containers of fluids on the generator or allow fluids to spill on the generator Do not operate the generator without adequate clearance for ventilation Space between the bottom of the feet and the floor of the generator should be free of obstruction At least two inches of air should separate the sides back and top of the generator from any ventilation obstructing surface Do not place the generator in a small non ventilated location Connect accessories e g pencil foot cord bipolar instruments return electrode etc to the proper receptacle using connectors specifically designed for the intended purpose F
9. be found in the Troubleshooting Section of this Manual Rear Panel Controls Indicators and Receptacles The following descriptions correspond to controls indicators and receptacles on the back panel of the generator shown below Monopolar Footswitch Connectors Volume Control too 240v N wW A At Footswitch O Footswitch Sa Monopolar B o om Monopolar A ooW o Pei oo er O oO N ae IA RE Grounding Lug Connector Power Entry Figure 8 1 Volume Control The volume level is preset at the factory for all alarms Volume control for Cut and Coag tones may be increased by turning the knob in a clockwise direction and decreased by turning the knob in a counter clockwise direction 2 Monopolar Footswitch Connector A Megadyne two pedal footswitch is connected by inserting the keyed connector into the proper receptacles and tightening the threaded collar The Monopolar A footswitch will activate accessories attached to the A receptacles on the front of the generator The B footswitch will activate accessories in the B receptacles on the front of the generator 3 Bipolar Footswitch Connector A Megadyne one pedal footswitch is connected by inserting the keyed connector into the proper receptacle and tightening the threaded collar 4 Power Cord Connector The hospital grade 3 prong power cord supplied with the generator is inserted here to provide power to the unit 5 Grounding Lug
10. dB non adjustable CQM Three Beeps 2550 Hz 10 gt 65 dB non adjustable Contact Quality Monitor Megadyne recommends the use of the Mega 2000 Patient Return Electrode Due to the built in safety self current limiting of the Megadyne Mega 2000 patient return electrode the CQM limitation is no longer essential If a disposable split pad is used with the Mega Power the system will perform as follows Acceptable Resistance Range thermal safety Return electrode 5 to 135 ohms or up to 30 increase in the initial measured contact resistance between the return pad and the patient CQM Alarm Activation thermal safety When the measured resistance exceeds the aforementioned parameters the CQM indicator will flash red an alarm tone will sound twice and the RF output will be disabled The Mega Power system will remain in this mode until the unsafe condition is corrected RS232C Port This communication port is located in the back panel behind a removable plate The RS232 Port is used for calibration See the calibration section in the Service Manual for details 27 Declaration for Electromagnetic Emissions The Mega Power is intended for use in the electromagnetic environment specified below The user of the Mega Power should assure that the Mega Power is used in such environment RF Emissions CISPR 11 Group 2 The Mega Power must emit electromagnetic energy in order to perform its intended function RF Emissions CI
11. dip in Ut for 5 cycles 70 Ut 30 dip in Full compliance Mains power quality should be that of a typical commercial or hospital environment If the user of the Mega Power requires continued operations during power mains interruptions it is Ut for 25 cycles recommended that the Mega Power be lt 5 Ut gt 95 dip in powered from an uninterruptible power Ut for 5 sec supply or a battery Power frequency 50 60 3 A m Full compliance Power frequency magnetic fields should Hz magnetic field IEC 61000 4 8 Disposal be at levels characteristic of a typical commercial or hospital environment The equipment can be disposed of at the end of its useful life as with normal electronic scrap Notice Follow local governing ordinances and recycling plans regarding disposal or recycling of device components 28 Approved Accessories Megadyne recommends use of the following Megadyne accessory devices with the Mega Power Electrosurgical Generator These accessory devices have been tested and are approved for use at the peak voltages listed in this manual The user is responsible to insure that any other accessories used with the Mega Power ESU are rated for the maximum peak output voltages reference to diagrams included herein set at the intended output control setting in the intended operating mode ltem Description Catalog Number Monopolar Footswitch 1400 Bipolar Footswitch 1450 MEGA Soft Patient Retur
12. error in the Primary Relay Relay Sense Error 228 Master MP1 Relay The Master Microcontroller detected an error in the Primary Relay Sense Error 229 Master MP2 Relay The Master Microcontroller detected an error in the MP2 Relay Sense Error 230 Master Secondary The Master Microcontroller detected an error in the Secondary Relay Relay Sense Error 24 Technical Specifications General Equipment Specifications Equipment Classification Equipment Type Degree of protection against ingress of water Patient Circuit Cooling Physical Characteristics Width Depth Height Weight Operating Environment IEC 60601 1 Class IEC 60601 1 Type CF Meets ANSI AAMI HF 18 UL 60601 1 1 Ed IEC 60601 2 2 Isolated from Earth Ground Natural Convection Modulated Internal Fans 40 5 cm 15 9 inches 40 5 cm 15 9 inches 20 cm 7 9 inches 8 65 kg 19 Ibs The Mega Power generator is designed and tested to operate within the following environmental parameters Temperature Range Humidity Range Atmospheric Pressure Warm up requirements 10 C 50 F to 40 C 104 F 15 to 75 Non condensing 700 hPA 10 2 psi to 1060 hPA 15 37 psi If the Mega Power is stored outside of the above range allow the unit to stabilize at room temperature for a minimum of one hour before use Storage Environment The Mega Power generator is designed and tested for storage within the following environmental parame
13. of power consumption compared with the RF output power being delivered 204 Relay Error One or more relays have failed the relay diagnostic test 205 Activation Error One or more of the foot switches or hand switches were in the active state during power up 206 CQM Error An error was detected in the CQM Network during the Power On Self Test POST 207 Front Panel Button A button press was detected during POST this condition is not permitted Press Error 208 Active Measurement An error was detected in the B Voltage sense network during Power On Diagnostics Error B Self Test POST 209 PFC Shutdown The internal power supply has reached an overload condition and has shutdown The unit may be reset by turning off the power ifthe overload condition has cleared such as an over temperature condition 210 Calibration The Master Microcontroller reads the calibration constants and the Constants checksum from EEPROM Ifthe values do not match an error is displayed Checksum Error 211 WD CQM Error The Watchdog has detected a CQM Error 212 CQM Test Error The WD has detected an error in the CQM Network during the Power On Self Test POST 213 WD Dosage Error The Watchdog Microcontroller has detected an excessive amount of power consumption compared with the RF output power being delivered 23 214 Primary Relay The Watchdog has detected the inappropri
14. 300 250 N o o Power HF Output W a o 100 50 0 50 100 150 200 250 300 Power HF Maximum W 32 HF Voltage Vp Pure Cut HF Voltage vs Output Power 1600 1400 1200 1000 800 600 400 200 0 100 150 200 250 Output Power W Blend Output Power Graphs Blend Cut Output Power vs Load Resistance 300 250 200 200 W 150 gt o a 100 100 W 50 0 0 500 1000 1500 2000 Load Resistance Ohms 33 2500 Power HF Output W Blend Cut Power Output vs Power Max RI 300 Ohms 250 200 150 100 50 0 50 100 150 200 Power HF Maximum W Blend Cut HF Voltage vs Output Power 1800 1600 1400 1200 1000 800 HF Voltage Vp 600 400 200 0 40 80 120 160 200 Output Power W Power W Power HF Output W Standard Coagulation Output Power Graphs Standard Coag and Coag with Cut Output Power vs Load Resistance 140 120 100 120 W 80 60 fo Porn IS E 60 W 40 20 0 500 1000 1500 2000 2500 Load Resistance Ohms Standard Coag and Coag with Cut Power Output vs Power Max RI 500 Ohms 3000 140 120 100 80 60 40 20 0 t t
15. 400 1 4 Low Frequency 50 60 Hz Leakage Current NC SFC Earth Leakage Current general lt 300 pA lt 1 0 mA Enclosure lt 100 pA lt 500 pA Patient Leakage Current lt 10pA lt 50pA Patient Auxiliary Current d c lt 10uA lt 50pA Patient Auxiliary Current a c lt 100uA lt 500 pA High Frequency RF Leakage Current Monopolar Modes all settings at the maximum Patient Return to Ground lt 150mA Active to Ground lt 150mA Bipolar Mode Maximum setting Each Lead to Ground lt 63mA 26 Power Consumption Maximum mains current 100 120 VAC 220 240 VAC Idle 0 3 A 0 15 A Cut 5 0 A 2 5 Coag 2 4 A 1 2 A Bipolar 1 3A 0 65 A Power Factor Correction Idle 0 85 0 70 Cut 0 99 0 98 Coag 0 98 0 97 Bipolar 0 95 0 93 Power Cord Hospital Grade three prong connector Power Duty Cycle Under maximum power conditions the Mega Power generator is designed to operate safely with activation times of 10 seconds on 30 seconds off for one hour Audio Volume The MEGA POWER system is designed to generate the following audio levels Mode Frequency Volume Adjustability Pure Cut 840 Hz 10 40 to 65 dB ACE 840 Hz 10 40 to 65 dB Blend 840 Hz 10 40 to 65 dB Coag Standard 520 Hz 10 40 to 65 dB Coag Spray 520 Hz 10 40 to 65 dB Bipolar 480 Hz 10 40 to 65 dB Bipolar Monitor 800 to 1600 Hz 10 40 to 65 db Power Limit Alarm One beep 1980 Hz 10 gt 65 dB non adjustable Errors Two beeps 1980 Hz 10 gt 65
16. MEGADYNE MEGAPOWER Electrosurgical Generator SERVICE MANUAL gt ae til Mic x Copyright 2008 All rights reserved Service Manual Part 3000106 01 Rev D 2008 05 12 1 The Mega Power Electrosurgical Generator is manufactured in the United States by MEGADYNE Megadyne Medical Products Inc 11506 South State Street Draper UT 84020 USA Phone 801 576 9669 800 747 6110 U S A only EC REP Quality First International Limited 20 Eversley Road Bexhill on Sea East Sussex TN40 1HE 0050 United Kingdom 2008 Megadyne Medical Products All rights reserved Megadyne is a registered trademark of Megadyne Medical Products Mega Power is a trademark of Megadyne Medical Products Mega Power Patent numbers D491 666 D491 667 Mega 2000 is a registered trademark of Megadyne Medical Products Table of Contents 1 Preface and Service Center Information i 1 2 Limited Warranty ao oe li Ren 2 3 Introduction and General Description i 3 di EISTOF ASSSMDIBB Aalen 3 5 Warningsz222 een 4 Di AU ION E N O ie ie ili dai 5 I SOV INDO S rato id doa ado ao te dd cd a a tebe ae dii 6 8 Operating Instructions sii DEE 7 9 Front Panel Controls Indicators and Receptacles 11 Power Switch Cut Modes AGE Pure Gut Bletidi ssaa aloe 12 Coag Modes Standard Spray Coag W Cut 13 Bipolar Mode Standard
17. Macro Bipolar Only ae IGN in the standard Bipolar mode when you see two vertical green lights illuminated on the current Meter 3150596 01 REV A 8 29 2007 6 Mega Power Bipolar Current Meter The Mega Power Electrosurgical Generator Bipolar macro setting features a Bipolar Current Meter with both a visual graph and bipolar tone to provide an indication of the amount of current flow between the tips of the bipolar instrument Bipolar Current Meter Tone The current meter bipolar tone can be activated and deactivated when desired To activate the Mega Power current meter bipolar tone press the Pure and Blend keys on the front display panel simultaneously A single tone will indicate that the bipolar current meter tone is activated During use the bipolar tone will begin with a rapid tone and reduce to a slower metered tone as current flow is diminished The bipolar current meter tone is turned off in one of two ways 1 Press the Pure and Blend keys simultaneously A tone will indicate the current meter bipolar tone has been disabled 2 Or simply turn the main power switch off on the front panel The Mega Power bipolar current meter tone will need to be turned on as instructed above each time the unit is powered on if the tone is desired during the case Bipolar Visual Indicator The visual indicator will appear automatically when bipolar is in use As tissue becomes desiccated it becomes more resistive and less current
18. Micro Bipolar The Mega Power automatically boots up in the Standard Micro bipolar setting This setting is utilized for the majority of all bipolar cases and delivers a precise and controlled bipolar effect The initial voltage is kept low to prevent sparking and the system maintains a specific power curve to achieve the proper tissue effect Macro Bipolar Bipolar cases requiring a more rapid onset of power and higher voltage power output utilize a macro bipolar power curve To access the Macro bipolar setting simultaneously press the Standard and Spray Coag buttons as instructed below BIPOLAR ADJUSTMENT KEY 15 Coag with Cut Effect Macro Bipolar Bipolar Tone To activate the Macro Bipolar simultaneously press the AI wiin Ou Standard and Spray Coag buttons To activate the Bipolar Tone effect _simultaneously press in the Macro Bipolar Mode the Pure Cut and the Standard simultaneously press the Coag buttons Standard Spray Pure Cut and Blend buttons When the Macro Bipolar mode is selected the two green vertical A doma walh neleis iek e ai current meter Bipolar tone standard lights illuminated on the current meter upon start up will disappear a Fay Low Current Flow High When this mode is selected unu Blend the Standard Coag button ill blink AIA O To revert back to the Standard Bipolar Mode simultaneously press 2 b di o indication the Standard and Spray Coag buttons You will know when you are Tone for
19. SPR 11 Class A The Mega Power is suitable for use in all Harmonic Emissions IEC 61000 3 2 Class A establishments other than domestic and those Voltage Fluctuations Flicker Emissions Complies directly connected to the public low voltage power IEC 61000 3 3 supply network that supplies buildings used for domestic purposes Declaration for Electromagnetic Immunity The Mega Power is intended for use in the electromagnetic environment specified below The user of the Mega Power should assure that the Mega Power is used in such environment Immunity Test IEC 60601 Test Level Compliance Level Electromagnetic environment guidance Electrostatic discharge ESD IEC 61000 4 2 6kv contact 8kv air Full compliance Floors should be wood concrete or ceramic tile If floors are covered with synthetic material the relative humidity should be at least 30 Electrical fast transient burst IEC 61000 4 4 2kv for power supply lines 1kv for input output lines Full compliance Mains power quality should be that of a typical commercial or hospital environment Surge IEC 61000 4 5 1kv differential mode 2kv common mode Full compliance Mains power quality should be that of a typical commercial or hospital environment Voltage dips short interruptions and voltage variations on power supply input lines IEC 61000 4 11 lt 5 Ut gt 95 dip in Ut for 0 5 cycle 40 Ut 60
20. Step 5 Removal Replacement of the Heat Sinks This step applies to item A left heatsink and item D right heatsink Remove the two 2 screws through the access holes items E see diagram on next page located on the flanking chassis plates attached on each side of the ESU Remove one 1 screw on the chassis item F see diagram on next page Pull the heat sink upwards to remove it This step applies to item B center heatsink Remove item C low voltage supply harness to obtain access to item B Remove the two screws securing the heat sink item B to the motherboard Pull the heatsink upwards to remove it Repeat steps in reverse order to install Heat sinks 47 48 Step 6 Removal Replacement of the Front Panel Display Remove the four 4 screws securing the front panel display item A to the chassis Disconnect the wires item B connecting the front panel to the power entry module item C at the power entry module Disconnect the wire harness that runs from the front panel to the Power Conversion Board PCB at the Power Conversion board Remove the PCB from the front cover by unplugging the ribbon cable item D and removing the six 6 screws holding the PCB to the molded front panel not shown Repeat steps in reverse order to install the front panel display and PCB Screw Screw Screw Screw MM Oe ee ee ee a e 49 Step 7 Removal Repl
21. The grounding lug is provided for additional grounding of the chassis when required 6 Fuse Box The fuse box can be accessed by using a small flat instrument to open the drawer and pulling the receptacle towards you If the fuse has been damaged replace with the proper size fuse two each F10 0 250V 7 Bar Code and Serial Number Plate The unique serial number is listed on the plate with a corresponding bar code figure 9 Bar Code and Serial Number Plate Catalog Model Number 1000 This equipment rated for MEGADYNE m intermittent duty at maximum RR STATE STREET 123456 MEGA POWER output 10 seconds on and30 Fron 1 BON SZENE 41 8044 747 5110 LUBA I I seconds off according to Fax 1 BON 5740408 1 IST 204774 LUI E9 100825 IEC 60601 2 2 EU Aulhorisad Reprazaniative 7 Sudity Fret nkmatond Limted ilken Sea Serial Number 01 061 x 45 20 Evarday Rood Bexhillen East Sax THO THE Max Power United Kingdom Footswitch Footswitch Footswitch Monopolar 300 w Bipolar Monopolar B MonopolarA BiPolar sow Frequency 400 kHz R ated Load CUT 300 ohms COAG 500 ohms BiPolar 100 ohms Figure 9 Calibration Check Active outputs This test requires an ESU analyzer and test leads for connection to generator This test can also be performed with fixed loads and a current Loop All equipment used must be able to measure true RMS 1 Connect the Mega Power monopolar A output to the ESU analyzer Short the two l
22. This combination of tissue reformation results in hemostasis A high voltage waveform is generally used with intermittent application of current Area of the reusable electrode which bears the weight of the patient The flow of electrons in a circuit measured in amperes An ampere is defined as the number of electrons moving past a given point per second The flow of electricity The electrosurgical effect which results from high current density in the tissue causing cellular fluid to convert to steam and burst the cell structure Voltage is low and current is high The condition that occurs when one electrical conductor the active electrode comes into direct contact with another secondary conductor tissue scopes graspers Electrical current will flow from the first conductor into the secondary one and energize it Electrosurgery Electrosurgical Circuit Impedance Insulation Failure Isolated Output Monopolar Electrosurgery Patient Return Electrode Resistance Return Electrode Contact Quality Monitoring RECQM Voltage 57 The use of high frequency electrical current through tissue to create a desired clinical effect cutting or coagulating A closed path through which an electric current is caused to flow by application of a voltage between the active and return terminals of an electrosurgical generator The opposition to the flow of electric current through conductors resistors capacitors or i
23. acement the Low Voltage Power Supply Remove the four 4 screws securing the low voltage power supply item A to the chassis Repeat steps in reverse order to install the low voltage power supply A ee n cm dl e Kur ae eg Screw Screw i n H Il gt o Screw Screw A B k 4 E ni E gt e 50 Step 8 Removal Replacement of the Motherboard Remove the two 2 high voltage connector screws and fifteen 15 chassis screws securing the motherboard item A to the chassis Pull horizontally towards the front on the high voltage connector item B to remove the motherboard from the chassis HV Screw Repeat steps in reverse order to install the motherboard HV Screw Both Sides E mm E i ni Tf WW 51 Step 9 Removal Replacement of the footswitch board Loosen the set screw on the volume knob item A and remove the volume knob Remove the nut securing the volume control on the other side of the chassis Remove six 6 4 40 screws and two 2 6 32 screws to remove the footswitch board item B See diagram on next page from the chassis Repeat steps in reverse order to install the footswitch board 52 Step 10 Removal Replacement of the Power Entry Module Remove the wire connector item A at the power entry module item B Remove the two screws that secure the power entry module to the chassis and pull towards
24. ate activation of the Primary Control Error Relay 215 MP1 Relay Control The Watchdog Microcontroller has detected inappropriate activation of the Error MP1 Relay 216 MP2 Relay Control The Watchdog Microcontroller has detected inappropriate activation of the Error MP2 Relay 217 Secondary Relay The Watchdog Microcontroller detected a failure of the Secondary Relay Control Error 218 Frequency Error The Watchdog Microcontroller has detected the incorrect output waveform 219 Power Control Error The Watchdog Microcontroller has detected the incorrect power setting on the HVPS 220 Active Measurement An error was detected in the I current sense network during Power On Diagnostics Error l Self Test POST 221 Active Measurement An error was detected in the voltage sense network VSV during Power Diagnostics Error On Self Test POST VSV 222 Idle State Feedback The analog signal levels are above the specified levels during an idle state Error condition 223 WD Primary Relay The Watchdog Microcontroller detected an error in the Primary Relay Sense Error 224 WD MP1 Relay The Watchdog Microcontroller detected an error in the MP1 Relay Sense Error 225 WD MP2 Relay The Watchdog Microcontroller detected an error in the MP2 Relay Sense Error 226 WD Secondary The Watchdog Microcontroller detected an error in the Secondary Relay Relay Sense Error 227 Master Primary The Master Microcontroller detected an
25. ation Little hemostasis is achieved when in this mode Selecting the BLEND key places the generator cut function into a blended cutting mode The light on the key will illuminate indicating that it is selected This is a mix of the cutting and coagulation waveforms The maximum power allowed in this mode is 200 W It provides a cutting effect and a higher level of hemostasis than either the ACE or PURE cut modes During the case the last BLEND setting used will remain in memory until the mode or power setting is changed Once the generator is turned Off and On again depressing the RECALL button will recall the last mode and power setting used CUT POWER ADJUSTMENT KEY COAG POWER ADJUST KEY MEGA ALONSO loc _J _MEGADYNE e POWER IN A A cur COAG BIPOLAR BIPOLAR ADJUSTMENT KEY OFF POWER PATIENT RETURN A ELECTRODE ALARM V V V aranmu cd a ee Am TD gt ch ammm RECALL CURRENT METER 3 COAG The coag controls are color coded blue The large numerical display indicates the power setting The arrow up key will increase power settings in increments of one watt up to 40W and in 5W increments thereafter to a maximum of 120W The arrow down key will decrease power settings in increments of five watts from 120W to 40W and in one watt increments thereafter Selecting the STANDARD key places the generator coag function into the desiccation mode The light on the key will illuminate indi
26. bration testing be performed at annual intervals Refer to the calibration testing section in this manual for details In addition to calibration testing routinely inspect the power cord footswitch cables and connectors for any signs of damage Replace damaged cords and or connectors immediately Should your Mega Power Electrosurgical Generator require service or repair please contact Megadyne s Customer Service department to obtain a Returned Goods Authorization RGA number Return the generator in its original packaging if possible with the RGA number written on the address label to MEGADYNE Medical Products Inc 11506 South State Street Draper UT 84020 USA Phone 801 576 9669 800 747 6110 U S A only Fax 801 576 9698 Limited Warranty For the periods and the conditions specified below Megadyne warrants to the original purchaser that the Mega Power Electrosurgical Generator will perform to our published specifications when used and maintained in accordance with our written instructions The Mega Power Electrosurgical Generator is warranted to be free of defects under normal use and maintenance for two years from the date of purchase Megadyne will at its option repair or replace the defective product without charge using new or remanufactured parts Megadyne reserves the right to make a repair in its factory at any authorized repair facility or at the purchaser s premises An unauthorized repair of the Mega Power E
27. cating that this mode is selected The desiccation mode provides hemostasis to tissue that is in contact with the active electrode and provides diminished cutting effect when compared to cut modes Coag with Cut Mode To achieve more cutting effect in the STANDARD Coag mode press the Pure Cut and the Standard Coag buttons simultaneously This activates a second coag mode Coag with Cut for surgeons desiring a mild cutting effect during coagulation When this mode is activated the Standard Coag button will blink on and off To return to the Standard Coag mode simply press the Standard Coag button once or go to Spray Coag and back to the Standard Coag mode The blinking light will turn to a solid light and you will be returned to the Standard Coag mode Powering down the system will also return the Mega Power to the Standard Coag mode The second Coag mode can easily be recalled if it was the last mode used upon start up by pressing the RECALL key or simply use the instructions above to activate the mode Selecting the SPRAY key places the generator coag function into the spray or fulguration mode The light on the key will illuminate indicating that this mode is selected During the case the last SPRAY setting used will remain in memory as a convenience to users when toggling between modes during a case Once the generator is turned Off and On again depressing the SPRAY mode will change the mode but not the power setting for patien
28. e attached to that channel Only one active device may be plugged into each channel at a time i e either the 3 prong pencil cord or phone plug style cord Note Only one monopolar accessory can be activated at a time Depressing the single footswitch of the bipolar foot control will activate bipolar instruments attached to the bipolar receptacles For bipolar hand switching devices closing the tips of the bipolar forceps will engage the switch on the instrument and will activate the device Note The cut or coag display will become brighter when activated while the unused display will dim Cleaning Disconnect the power cord from the wall outlet prior to cleaning the generator Use a mild detergent or disinfectant to clean the generator Abrasive cleaners will scratch the displays Do not allow fluids to drain inside the generator 10 Front Panel Controls Indicators and Receptacles The Mega Power generator is designed as a full functioning easy to use electrosurgical unit for cutting and coagulating tissue figure 6 Figure 6 Information regarding Mega Power functions and descriptions are detailed on the pages to follow 11 The following descriptions correspond to controls indicators and receptacles on the front panel of the generator shown below figure 7 CUT POWER ADJUSTMENT KEY COAG POWER ADJUST KEY MEGA AINSI lm MEGADYNE e POWER BIPOLAR ADJUSTMENT KEY PATIENT RETURN ELECTRODE
29. eads from the return electrode and connect them to the ESU analyzer 2 Set the Mega Power to the PURE CUT 20 watts and set the ESU analyzer to 300 ohms 3 Activate the Mega Power using the footswitch on monopolar A Verify an audible tone while the ESU is activated 4 Activate the Mega Power and Verify the output power is 20 Watts 4 watts using the ESU analyzer 5 Change the power setting on the Mega Power to 300 watts activate the Mega Power and Verify the output power is 300 Watts 60 watts using the ESU analyzer 6 Set the Mega Power to the STANDARD COAG 20 watts and set the ESU analyzer to 500 ohms 14 Activate the Mega Power using the footswitch on monopolar A Verify and an audible tone while the ESU is activated Activate the Mega Power and Verify the output power is 20 Watts 4 watts using the ESU analyzer Change the power setting on the Mega Power to 120 watts activate the Mega Power and Verify the output power is 120 Watts 24 watts using the ESU analyzer Disconnect the Mega Power monopolar A from the ESU analyzer and connect the Bipolar output to the ESU analyzer Set the Mega Power Bipolar to 10 watts and set the ESU analyzer to 100 ohms Activate the Mega Power using the bipolar footswitch Verify and an audible tone while the ESU is activated Activate the Mega Power and Verify the output power is 10 Watts 2 watts using the ESU analyzer Change the power setting on the Mega
30. er Output 1 Check all accessories for proper set up and installation Patient Return Electrode Alarm Stays On 1 2 3 4 5 Check the return electrode cables to insure that they are securely attached to the pad and generator Make sure sticky pads are securely attached to the patient over a good muscular vascular area If the patient return electrode alarm light remains illuminated red replace the return electrode and or return electrode cable Turn the generator to the Off position and then back to the On position If the alarm condition cannot be immediately corrected use a backup generator Greater than Expected Neuromuscular Stimulation 21 Discontinue use of active accessories Check all connections for secure fit before continuing use of the generator Decrease the power setting or change to STANDARD COAG from SPRAY COAG as relevant If neuromuscular stimulation continues replace the generator with a backup unit Have qualified service personnel test the generator for abnormal low frequency current leakage If excessive low frequency current leakage is detected return for service Monitor Interference Monitor interference can be an artifact of Electrosurgery Steps to minimize interference are as follows 22 1 Insure that the ECG electrode is well attached to the patient through proper skin preparation prior to electrode placement Insure the electrosurgical cables acti
31. flows Non desiccated tissue will allow relatively high current flows and will illuminate all or most of the green lights on the bar graph Desiccated tissue will restrict current flow reducing the number of lights illuminated on the bar graph Hand switching Accessory Receptacles The two monopolar hand switching receptacles are designed to accept standard three prong active accessory devices e g an electrosurgical pencil Either receptacle may be used Note Only one monopolar accessory can be activated at a time Foot switching Accessory Receptacle The Foot switching accessory receptacle on the front of the generator accepts most 8 mm diameter male style phone plug style connector from active accessory cords Power is delivered to this receptacle when the monopolar footswitch is attached to the appropriate receptacle on the back of the generator and is depressed by the operator Note Only one monopolar accessory can be activated at a time CUT POWER ADJUSTMENT KEY COAG POWER ADJUST KEY MEGA WOMEN aa MEGADINE POWER ml IN A A CUT COAG BIPOLAR BIPOLAR ADJUSTMENT KEY OFF POWER PATIENT RETURN A ELECTRODE ALARM V y V sanm co Am TD gt lt o RECALL CURRENT METER 9 Bipolar Receptacle The bipolar receptacle can accept either a foot switching accessory or a hand switching accessory A foot switching instrument requires the two large connectors to be inserted into the two mating receptacles A hand
32. gadyne customer service to obtain an RGA number and shipping instructions prior to sending the Mega Power in for calibration Megadyne Medical Products Inc 11506 South State Street Draper UT 84020 USA Phone 801 576 9669 800 747 6110 U S A only 20 Troubleshooting Error Codes Troubleshooting follow the steps in the order listed for the appropriate problem No output power 1 2 3 ao 2O ee Check that the generator power switch is in the on position Insure the generator is plugged into a grounded functioning outlet and that the power cord is securely attached to the receptacle at the rear of the generator Check the cables and connections to insure that they are intact and securely connected Insure the patient return electrode is properly installed and connected to the generator If the patient return electrode alarm light stays illuminated red see Patient Return Electrode Alarm Stays On section Check that the active accessories are attached Check to see if the unit is in the Standby mode dashed lines in display or if the power setting is too low Adjust the power accordingly Turn the generator to the Off position and then back to the On position Replace the accessory devices i e pencil or footswitch Check the fuse and replace it if necessary If the problem is not corrected with the above steps use a backup generator and return the unit for service Diminished Pow
33. hat the power cord is fully inserted into both the generator receptacle on the back of the generator and into the appropriate grounded outlet figure 1 The generator will function in either the 100 or 240 volt modes depending on the power applied to the generator x Power Cord Figure 1 Foot Controls If footswitches are to be used for activating the active electrode attach the monopolar and or bipolar foot controls to their appropriate receptacles while the generator is in the off position figure 2 If footswitches are not used during the procedure disconnect the footswitches from their receptacles BIPOLAR FOOTSWITCH CABLE MONOPOLAR B FOOTSWITCH CABLE MONOPOLAR A FOOTSWITCH CABLE Figure 2 Patient Return Electrodes Install a patient return electrode according to the electrode manufacturers instructions for use Megadyne recommends the use of the Mega Soft family of Reusable Patient Return Electrodes however the Mega Power Electrosurgical Generator is compatible with all approved return electrodes Insert the return electrode cable into the proper receptacle figure 3 PATIENT RETURN n Figure 3 Active Accessories The Active Accessories are the monopolar hand switching pencils electrodes monopolar foot cords and bipolar cords Megadyne recommends the use of the Megadyne family of Active Accessories including E Z Clean electrodes Fully inser
34. lectrosurgical Generator will void this warranty In addition the warranty is null and void if the Mega Power Electrosurgical Generator is used other than is specified in the Operator s Manual Without limitation the warranty does not cover damage caused by customer misuse of the Mega Power Electrosurgical Generator THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED AND ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE IS EXPRESSLY DISCLAIMED Purchaser s exclusive remedy for any failure of the Mega Power Electrosurgical Generator is as provided in this Limited Warranty In no event shall Megadyne be liable for any special incidental consequential indirect or other similar damages arising from break of warranty break of contract negligence or any other legal theory Introduction and General Description The Megadyne Mega Power Electrosurgical Generator is designed to produce radio frequency RF current for cutting and coagulation during surgical procedures It is an isolated output generator This manual describes the attributes and specifications of the generator describes the internal workings and provides a guide to the procedures necessary for calibrating testing and servicing the unit For reasons of personnel safety and continuing reliability the generator should not be operated calibrated tested or internally examined by anyone except trained technicians who are skilled in the o
35. ment required e Phillips screwdriver Step 1 Remove the ESU Cover and Chassis Cover Turn off the generator Disconnect the power cord from the wall receptacle Remove the five 5 screws that secure the cover item A to the chassis Pull the cover off of the chassis by pulling the ESU cover horizontally toward the rear of the ESU 27 a MR Bo a ui tec zaa O ter nesso oyo Screw Screw capitana Der h mt owe mus Screw Screw 41 Remove the ESU Cover and Chassis Cover continued Remove the chassis cover item B Remove the four 4 screws that secure the Chassis Cover to the Chassis Lift the front of the Chassis Cover and remove both wire harness connecters from the front panel which connect to the Chassis Cover Note Step 1 will be required before proceeding with any of the following steps B m Ei Ei Ei al if E i E I Al i Screw Screw i Screw Screw 42 Step 2 Fuse Replacement Motherboard Fuse Replacement Remove the fuse item A by pulling straight up on the fuse until it s free of the fuse clip Replace with a new fuse by pressing the fuse straight down until the fuse snaps into place 43 Power Entry Module Fuse Replacement Remove the fuses in the Power Entry Module by prying open the access drawer item B with a small flat blade screw driver Replace the fuses in the drawer and return the
36. n Electrode 0800 0830 M2K 01 Re CORDalbe adhesive backed 0850 0855 0870 0875 Patient Return Electrodes E Z Clean Electrodes contact MEGADYNE for item numbers Electrosurgical Pencils with tips 0035 0035H 0037 0037H 0039 0039H Active Electrode Cables and Adapters 0075 Warning The use of accessories other than those specified above may result in increased emissions or decreased immunity of the Mega Power Electrosurgical Generator 29 Power W Power Curve Graphs Ace Power Curve Graphs ACE Cut Output Power vs Load Resistance 160 0 140 0 120 0 100 0 60 0 40 0 20 0 0 0 0 500 1000 1500 2000 Load Resistance Ohms 30 2500 3000 3500 Power HF Output W HF Voltage Vp 180 160 140 120 100 80 60 40 20 ACE Power Output vs Power Max RI 300 Ohms ACE Output at Rated Load 20 40 60 80 100 120 Power HF Maximum ACE HF Voltage vs Output Power 150 160 700 600 500 400 o o o 100 31 25 50 75 100 Output Power W 150 Pure Cut Output Power Graphs Pure Cut Output Power vs Load Resistance 300 300 W 200 150 W Power W a o 100 50 500 1000 1500 2000 2500 Load Resistance Ohms o Pure Cut Power Output vs Power Max RI 300 Ohms 350
37. nductors measured in ohms An ohm is the voltage differential across a circuit segment which results from the passage of one ampere of current The condition that occurs when the insulation barrier around an electrical conductor is breached As a result current may travel outside the intended circuit The output of an electrosurgical generator that is not referenced to earth ground A surgical procedure that directs current from the surgical site through the patient s body and back to the generator with the use of a patient return electrode A plate or pad that recovers the therapeutic current from the patient in a low density format and safely returns it to the electrosurgical generator Also known as dispersive electrode neutral electrode grounding pad split plate electrode monitoring electrode and gel pad The opposition to the flow of electric current through a conductor or resistor measured in ohms Resistance is a special case of impedance A system that actively monitors tissue impedance between the patient s body and the patient return electrode and interrupts the power if the quality of the contact is compromised The force that pushes electric current through an impedance electromotive force or potential difference expressed in volts One volt is the force necessary to push one ampere through an impedance of one ohm It is also the potential difference created by the passage on one ampere through an impedance
38. of one ohm Appendix Safety Compliance UL 2601 1 Medical and Dental Equipment 2 edition CAN CSA 22 2 No 601 1 M90 Medical Electrical Equipment General Requirements for Safety 2 edition IEC 60601 1 Medical Electrical Equipment General Requirements for Safety 2 edition IEC 60601 1 4 Safety for Programmable Electronic Systems 1997 IEC 60529 2001 Degrees of Protection provided by Enclosures ANSI AAMI ES 1 1993 Safe current limits for Electromedical Apparatus Applicable Particular Requirements IEC 60601 2 2 Particular requirements for the safety of high frequency surgical equipment 1998 ANSI AAMI HF 18 2001 Electrosurgical Devices Electromagnetic Compliance EN 55011 1998 Industrial Scientific and Medical ISM Radio Frequency Equipment Radio Disturbance Characteristics Limits and Methods of Measurement CISPR 11 1997 Modified IEC 60601 1 2 2001 Medical Electrical Equipment Part 1 2 General Requirements for Safety Collateral Standard Electromagnetic Compatibility Requirements and Tests CISPR 11 1997 Industrial scientific and medical ISM radio frequency equipment Electromagnetic disturbance characteristics Limits and methods of measurement FCC 47 CFR Part 18 1998 Industrial Scientific and Medical Equipment 58
39. ollow the instructions for use provided by accessory manufacturers Apparent low power output or failure of the electrosurgical equipment to function correctly at normal settings may indicate faulty application of the dispersive electrode or failure of an electrical lead Do not increase power output before checking for obvious defects or misapplication Do not coil electrosurgical accessory cords and do not wrap electrosurgical accessory cords around metal objects This may induce current flow to unintentional areas causing shocks burns With the fan assembly removed do not activate the generator for more than one half hour at full rated power and load Activating the generator beyond the recommended Duty Cycle of ten seconds on and thirty seconds off for long periods of time can cause system overheating When repairing the generator follow the static control guidelines for semiconductors in order to avoid damaging individual components or board assemblies Symbols Symbol Description ON Power O OFF Power A Read instructions prior to use Generator output is floating with respect to ground Defibrillator proof type CF equipment Dangerous Voltage Equipotentiality Foot Switch 2 Speaker Fuse Return electrode connection Hand control receptacle Foot control receptacle Operating Instructions With the generator in the OFF position be sure t
40. peration and service of medical electronics equipment Component level electronic repair is restricted to Megadyne authorized personnel List of Assemblies The MEGA POWER generator contains the following subassemblies e Front Panel o ooo Control switch overlay Indicators Display Printed Circuit Board Power switch e Rear Panel Footswitch receptacles Volume control Power entry module Grounding lug RS232C port for system control and diagnostics O 0000 e Internal assemblies Power Factor Printed Circuit Board Microcontroller Printed Circuit Board Footswitch Printed Circuit Board Main Printed Circuit Board O ooo High Voltage Power Supply RF Output Heatsink Assemblies Low Voltage Power Supply Safety Circuits Fan Assembly Warnings The warnings given below pertain to testing calibration and servicing of the generator The service technician should also be aware of the warnings given in the Operators Manual for clinical use of the generator For operation of the generator connect the power to a properly grounded receptacle Do not use a power plug adapter Accessories connected to the generator are sources of high voltage high current and high frequency electricity Touching the non insulated portion of these accessories or any conductive surfaces that come in contact with these accessories during activation may result in serious injury Turn off and unplug the generator prior to cleaning R
41. switching instrument uses an additional male pin on the molded connector which is inserted into the smaller mating receptacle Note Bipolar and monopolar accessories may not be activated simultaneously 10 Patient Return Electrode Receptacle This receptacle accepts both single plate and split plate return electrodes Megadyne recommends use of the Mega Soft Reusable Patient Return Electrode family of products with the Mega Power electrosurgical generator 11 Patient Return Electrode Alarm When the generator is turned ON with nothing inserted into the Patient Return Electrode Receptacle the pad alarm will be illuminated red and the alarm will sound When a single plate pad is plugged into the receptacle with a sufficient connection the alarm light will turn green When a monitoring or split pad is plugged into the patient return electrode receptacle the generator performs a test to insure that the pad is properly attached to the patient When the pad is properly installed the alarm icon will be illuminated green If excessive impedance is detected in the split pad or the impedance increases by more than 30 from the initial measured value the alarm will sound and the alarm symbol will be illuminated red Megadyne recommends use of the Mega Soft Reusable Patient Return Electrode family of products with the Mega Power electrosurgical generator Additional information on the Patient Return Electrode Alarm can
42. t safety The fulguration mode uses higher peak to peak voltages to allow current to jump from the active electrode through air to the target tissue producing sparks This provides hemostasis in a more broad area with less depth of tissue damage when compared to desiccation The SPRAY coag mode provides diminished cutting effect when compared to cut modes 4 RECALL The RECALL key is provided as a convenience to users and recalls the last mode and the last power setting used after the system is turned on and the recall button is pushed During use toggling between modes will maintain the last power setting use POWER PATIENT RETURN ELECTRODE ALARM 14 CUT POWER ADJUSTMENT KEY COAG POWER ADJUST KEY MEGA ASINI Alem _ ____MEGADYNE e A A CUT COAG BIPOLAR v y v A E O se D L TI ze RECALL CURRENT METER Bipolar The BIPOLAR controls are color coded blue The large numerical display indicates the power setting The arrow up key will increase power settings in increments of one watt up to 80W The arrow down key will decrease power settings in increments of one watt When the bipolar mode is used the current will flow between the two tips of the instrument and will desiccate tissue The bipolar mode can be activated with either a hand switching device or with a bipolar footswitch The Mega Power offers two bipolar settings a standard micro bipolar and a macro bipolar Standard
43. t the Active Accessories into their appropriate receptacles ensuring that no metal is exposed figure 4 Powering the Generator Turn on the generator by placing the ON OFF switch into the ON position Once the generator completes the start up and self check routines of approximately 8 seconds the power displays will show dashed lines Power Settings To recall the last power setting used press the RECALL key Power settings may also be initiated by using the up arrow key when the dashed lines are displayed on the panel Power settings may be adjusted by using the up and down arrow keys TA IRON Lin MEGADYNE PN A 0107 tc BIPOLAR IN CUT v v vy Current Flow High Gr GE HANDSWITCHING DA FOOTSWITCHING CABLE BIPOLAR ns Figure 4 Modes Select the proper mode for monopolar CUT and COAG by depressing the appropriate mode key figure 5 The indicator light on that key will illuminate when the mode has been selected A ROMIN use POWER SETTING A A POWER SETTING WINDOW CUT ae Reyes WINDOW COAG ke MODE BUTTONS J v COAG MODE BUTTONS ACE Blend Standard Spray Figure 5 Activating the Generator Monopolar accessories attached to the monopolar hand switching receptacles may be activated by depressing either the CUT or COAG keys on the pencil or foot pedals Depressing either the CUT or COAG foot pedals will deliver power to the devic
44. ters Temperature Range Humidity Range Atmospheric Pressure Audio frequencies ACE Cut Pure CUT and Blend Standard Coag and Spray Coag Bipolar Alarms Power Limit One beep Errors Two beeps CQM Three Beeps 40 C 40 F to 70 C 158 F 10 to 100 Condensing 500 hPA 7 25 psi to 1060 hPA 15 37 psi 840 Hz 10 520 Hz 10 480 Hz 10 1980 Hz 10 1980 Hz 10 2550 Hz 10 The volume of the CUT COAG and BIPOLAR active signals can be adjusted up and down They have a minimum volume of 40 dB at a distance of one meter The alarm volume is fixed to exceed 65 dB at a distance of one meter per the requirements of ANSI AAMI HF 18 25 Type and Rating of Fuses 2 each F10 0 250V Electrical properties Nominal Operating Voltage 100 240 VAC Nominal Operating Frequency 50 60 Hz Output Power Variation Output variation as a function of input variation lt 5 Output Power Characteristics Mode Power Output Rated Maximum Operating Crest Factor Watts Tolerance Load Open Circuit Frequency Nominal Ohms Voltage kHz Vp p Rated Load Monopolar CUT ACE Cut 150 20 200 1500 400 1 4 Pure Cut 300 20 300 3000 400 1 4 Blend 200 20 300 4000 400 3 0 Monopolar COAG Spray 120 20 500 7200 400 8 0 Standard 120 20 500 5800 400 7 4 Coag with Cut 120 20 500 4000 400 6 0 Bipolar Standard Micro 80 20 100 760 400 1 4 Macro 80 20 100 760
45. the rear of the chassis until the power entry module is clear of the chassis Repeat steps in reverse order to install the power entry module 54 Parts List Description Center Heatsink Assembly Mother Board Assembly High Voltage Connector Assembly Right Side Heatsink Assembly Left Side Heatsink Assembly Front Panel Molded Nosecone w o PCB Front Panel Assembly with PCB Controller PCB Power conversion PCB Foot Control PCB Top cover Assemblyy Fan 3 x 3 x 5 with Connector Fan 2 4 x 2 4 x 5 with Connector Harness Foot Control to Main PCB Harness Controller to Front Panel Harness Power Main to Switch Harness Power Switch to PFC Harness Power PFC to LV Supply Harness Low Voltage Supply to Main Harness Line Ground to Chassis Fiber Optic Cable Low Voltage Power Supply AC Power Switch 3 Amp Motherboard Fuse Line Filter Fuse Cord Power 15 Screw Phillips Pan Head 4 40 X 1 4 Screw Phillips Pan Head 4 40 X 3 8 Screw Phillips Pan Head 4 40 X 2 0 Screw Phillips Flat Head 4 40 X 1 4 Screw Phillips Flat Head 6 32 X 3 8 Screw Phillips Flat Head 6 32 X 3 8 Screw Phillips Flat Head 6 32 X 5 8 Screw Phillips Pan Head SEMS 6 32 X 3 8 Screw Phillips Pan Head SEMS 6 32 X 5 8 Screw Phillips Pan Head SEMS 6 32 X 3 8 Screw Phillips Pan Head SEMS 4 40 X 5 16 Standoff Hex 25 X 1 125 Standoff Hex 25 X 2 25 Module Power Entry 10A Knob Volume control 55 Part Number 6020089 01 6020088 01 6020090
46. ubbing a cleaning cloth over the front panel may inadvertently activate the pressure sensitive switches thus turning the generator on or changing the power or mode settings Disconnect the power cord and wait at least five minutes before performing any procedures that require removal of the outer shell or replacement of parts or boards to allow discharge of power supply components When testing calibrating or troubleshooting with the shell off be aware that potentially lethal AC and DC voltages may be present on some components and exposed metal surfaces These constitute a serious shock hazard Do not touch any of these surfaces Use non conductive tools and isolated or high impedance test probes with high voltage insulated handles Do not wear ground straps when power is on When testing calibrating or troubleshooting with the outer shell and fan assembly off be aware that high voltage RF is present on many of the conductive surfaces whenever the generator is activated These constitute a serious burn hazard During activation of the RF output it is not only unsafe to directly touch exposed metal surfaces but it is also possible for an arc to form between a conductive surface and a body part Keep fingers at least one inch away from any internal generator parts while the generator is activated Use the lowest possible power settings to achieve the desired effects Do not install or activate the generator in the presence of flammable
47. ve and return do not cross the cables of the affected equipment Plug the affected equipment into a separate power outlet Use the lowest possible power setting to achieve the desired effect Interference is usually greatest in the SPRAY COAG mode it can be reduced by using a lower voltage mode such as STANDARD COAG Check all connections to the generator patient return electrode and accessories Some manufacturers of ECG electrodes offer RF radio frequency choke filters for use in the monitor leads These filters reduce interference while the generator is activated RF filters minimize the potential for an electrosurgical burn at the site of the monitor electrode Error Codes The Mega Power is designed to assist the user in identifying failure modes When specific conditions are met an error code will be shown in the large displays If any of the following errors are displayed and are not cleared by turning the system off then on record the error displayed and call Megadyne Customer Service at 1 800 747 6110 US only International 1 801 576 9698 Error Description Explanation Code 201 Communication Internal communications between internal micro controllers has failed Error 202 Watchdog Error Internal Watchdog microcontroller has detected an error and has shut the system down for safety reasons 203 Dosage Error The Master microcontroller has detected an excessive amount
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