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Utah Medical Products Finesse ESU-110, Service Manual

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©1994, 2009 by Utah Medical Products, Inc.

Finesse

®

is a registered trademark of Utah Medical Products, Inc.

The Finesse

®

Electrosurgical Generator and Smoke Evacuation System

is patented under U.S. patent number 5,160,334.

The contents of this manual may not be reproduced without express
written consent of Utah Medical Products, Inc.

The information contained in this manual was correct at press time.
However, unscheduled changes may have taken place that may ren-
der portions of this manual inaccurate.  Please contact Utah Medical
Products, Inc. for updated information if errors or changes in the
contents of this manual are suspected.

Summary of Contents for Finesse ESU-110

Page 1: ...Electrosurgical Generator and Smoke Evacuation System Service Manual Catalog Numbers ESU 110 ESU 220 Utah Medical Products Inc 7043 South 300 West Midvale Utah 84047 801 566 1200 800 533 4984 USA Canada ...

Page 2: ...334 The contents of this manual may not be reproduced without express written consent of Utah Medical Products Inc The information contained in this manual was correct at press time However unscheduled changes may have taken place that may ren der portions of this manual inaccurate Please contact Utah Medical Products Inc for updated information if errors or changes in the contents of this manual ...

Page 3: ...ar Panel Controls and Connectors 5 Specifications 7 General Specifications 7 Supply Voltage Current Specifications 7 Output Characteristics 7 Smoke Evacuator System 8 Circuit Descriptions 11 Test and Calibration Procedure 15 Complete Calibration Procedure 15 Preventive Maintenance Checklist 20 List of Drawings 22 TABLE OF CONTENTS ...

Page 4: ......

Page 5: ... red alarm lamp should go out and beeping should cease 5 Briefly operate the cut control on the handswitch The yellow cut lamp should light a tone should be emitted from the internal speaker and the vacuum pump should come on and stay on approximately five seconds after the cut control button is released If none of this occurs try another handswitch If the vacuum motor does not come on check the p...

Page 6: ...lter onto the vacuum motor inlet in the same orientation as the previous filter Replace the front filter adapter onto the front housing taking care to verify that the primary internal filter inlet seats properly into the front filter adapter Secure the front filter adapter to the front panel by replacing the three button head screws Replace the top cover onto the chassis by inserting the lip on th...

Page 7: ...ned on automatically by internal circuitry when ever the cut blend or coag modes are activated and shuts off after a delay of five seconds from the time the electrosurgical generator output is deactivated In addition to its conven ience this intermittent operation is beneficial to the life of the filters and to the vacuum motor itself 2 Cut Blend Indicator Lamp This yellow lamp is illuminated when...

Page 8: ...f dis persive pad receptacles are provided to accommodate the dis persive pad cable configurations that are commonly available The left most socket pair is provided to take two redundant leads out to a dispersive electrode If either of these leads has broken continuity or if either lead is omitted the red patient alarm warning lamp in the center of the terminal block illumi nates and current from ...

Page 9: ... is given in the Principles of Electrosurgery section of the Finesse Operator s Manual and the Technical Data section of this manual 11 Smoke Filter Connection This connection the large circular structure on the face of the front panel accepts the external disposable filter pack which provides first and second stage particulate removal and odor adsorption Rear Panel Controls and Connectors Control...

Page 10: ...Finesse Service Manual 6 ...

Page 11: ...35 W Overcurrent Protection The Finesse 115 V model is protected by a 6 25 amp slo blo fuse in each lead to the primary winding of the main power transformer The Finesse 230 V model is protected by a 4 amp slo blo fuse in each lead to the primary winding of the main power transformer Output Characteristics Output Frequencies The frequency of the interrupted waveforms is 450 kHz 50 kHz Interrupted ...

Page 12: ...ting Range 90 140 volts 180 280 volts Frequency 45 65 Hz 45 65 Hz Maximum Supply Current and Power At the Nominal Voltage the maximum supply current is 2 amps Maximum supply power for the ESU 110 is 230 watts and for the ESU 220 is 460 watts Overcurrent Protection The smoke evacuation motor is protected by a 3 amp fuse in the hot lead Air Flow vs Supply Voltage At a supply voltage within the Regul...

Page 13: ...ut power vs load resistance for cut and blend modes Figure 4 Typical output power vs load resistance for coag mode Figure 5 Typical output power vs output setting for cut and blend modes Figure 6 Typical output power vs output setting for coag mode ...

Page 14: ...is a pleated ULPA filter element Filter Life Annual replacement is recommended Combined Filter System Particle Removal Efficiency In laboratory tests spherical particles with a mean diameter of 0 1 microns were removed with a minimum efficiency of 99 999 Finesse Service Manual 10 ...

Page 15: ...eration are separately controlled with parallel circuitry However only the operation of the cut blend control circuit will be described The desired output for cutting is set by turning the cut blend output control knob on the front panel until the digital output indicator dis plays the correct value Voltage from the front panel potentiometer is routed to the A D input on the digital display board ...

Page 16: ...g capacitors are mounted on the RF power board The RF output is coupled to the active and dispersive output termi nals through an output transformer with series capacitors in both leads This results in an output which is RF isolated from ground and which is incapable of conducting low frequency currents which may cause serious neuromuscular stimulation in the patient Feedback Circuit Feedback cont...

Page 17: ...applied to the trigger input of a timer chip connected in a mono stable mode The output of the timer turns on a solid state relay which controls the current to the vacuum motor At an adjustable interval after cessation of output activation the timer output goes low and the vacuum motor is shut off The nominal delay for turn off is five seconds which is adjusted by R102 on the logic board Patient A...

Page 18: ...transistors In the event of an overheat condition all functions will cease and the green lamp inside the main power switch will turn off The unit will automatically reset after about 30 to 45 seconds Under normal clinical conditions the unit should perform without any activation of the thermal shutdown sensor However during cal ibration and testing of the unit the technician should allow for occa ...

Page 19: ...er such as Bio Tek model 170 AC Hi Pot Tester Handswitch and cable Footswitch and cable Jumpered dispersive cable with rectangular plug 900Ω jumper 1 0 VISUAL AND MECHANICAL INSPECTION 1 1 Remove the top shell of the Finesse and inspect the interior Verify that all connectors are fully seated that the vacuum motor is properly secured to its shock mounts and that all boards and components attached ...

Page 20: ...S ENTIRETY IF ONLY POWER OUTPUT RECALIBRATION IS DESIRED PROCEED TO STEP 6 6 3 1 Adjust the vacuum motor delay by pressing the cut switch momentarily The vacuum motor will start and should stay on for five 5 seconds Adjust R102 until a five second delay is achieved 3 2 Turn the cut mode output setting adjustment knob fully clock wise Adjust R3 to make the cut display read 98 Then adjust R3 so that...

Page 21: ... both buttons of the handswitch pen or both pedals of the footswitch should 1 cause the red alarm indicator to light 2 generate an even higher pitch tone and 3 cause the vacu um motor to briefly start and deactivate 5 0 WAVEFORM TESTS AND FREQUENCY ADJUSTMENT 5 1 Set oscilloscope to sensitivity of 5 volts per division and sweep rate of 1 microsecond per division Connect scope reference to TP303 Ma...

Page 22: ...nalyzer If R363 is present on board activate cut mode and adjust R363 until voltage at TP2 is 2 5 volts 7 2 Activate CUT mode and adjust R351 until voltage at TP2 is 3 0 volts 7 3 Turn unit off and short pin 1 to pin 16 these are the only two pins on the top side of the chip of opto isolator U301 to dis able the feedback opto isolator 7 4 Turn unit back on Press cut switch and verify that the unit...

Page 23: ...te the cut and the coag buttons simultaneously Verify that there is no output power a constant high pitch tone is generated and the red alarm lamp lights 900 OHM ALARM TEST 10 13Remove dispersive pad plug Note that the ESU will indicate a cable fault alarm Plug the test connector jumpered with a 900 ohm resistor into the dispersive pad receptacle The alarm should continue to sound HIGH POTENTIAL T...

Page 24: ...tacle are not damaged Pass Corrected Verify footswitch cord if present and rear panel receptacle are not damaged Internal Inspection and Service Pass Corrected Replace internal smoke evacuation filter Pass Corrected Verify all connectors are fully seated in their sockets Performance Inspection Verify the following power supply voltages tolerances in parentheses Pass Corrected J203 pin 1 ________VD...

Page 25: ...ial connector on rear panel to the dispersive input on the analyzer Check RF output through 200Ω load Pass Corrected Cut _____ 4W Pass Corrected Blend 1 _____ 4W Pass Corrected Blend 2 _____ 4W Pass Corrected Blend 3 _____ 4W Pass Corrected Coag _____ 4W Chassis Leakage Currents Using an electrical safety analyzer measure the following conditions Acceptable conditions are listed in parentheses Gro...

Page 26: ...ssembly Diagram Finesse Internal View 24 RF Power Board Assembly Drawing 25 Logic Board Assembly Drawing 26 Display Board Assembly Drawing 27 Power Supply Board Assembly Drawing 27 System Functional Diagram 28 Parts List 29 Finesse Service Manual 22 ...

Page 27: ...Mains Power Wiring Diagram Finesse Service Manual 23 ...

Page 28: ...Assembly Diagram Finesse Internal View Finesse Service Manual 24 ...

Page 29: ...RF Power Board Assembly Drawing Finesse Service Manual 25 ...

Page 30: ...Logic Board Assembly Drawing Finesse Service Manual 26 ...

Page 31: ...Display Board Assembly Drawing Power Supply Board Assembly Drawing Finesse Service Manual 27 ...

Page 32: ...System Functional Diagram Finesse Service Manual 28 ...

Page 33: ...h 8 0013 205 Power Adjustment Pot Coag Mode 9 0013 205 Power Adjustment Pot Cut Mode 10 90014 Display Board Assembly 11 0029 550 Main Transformer 12 90017 Power Supply Board Assembly 13 90015 Logic Board Assembly 14 90016 RF Power Board Assembly 15 0006 300 Main Power Cord Receptacle 16 0049 400 Footswitch Receptacle 17 0050 012 Output Transistors 18 0050 145 Preamplifier Transistor Utah Medical P...

Page 34: ...Medical Products Inc 7043 South 300 West Midvale Utah 84047 800 533 4984 801 566 1200 Utah Medical Products Ltd Athlone Business Technology Park Dublin Road Athlone Co Westmeath Ireland 353 90 647 3932 p n 5904 rev 071009 ...

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