FETALGARD Lite® Service Manual
Contents
1. Choices Monitor should now be ready for Questioning the results of normal operation the just completed action NOTE The Action procedure in a flow chart will be Cy detailed in a subsequent text The Replacement action for the designated assembly is detailed in Section 4 3 2 3 4 3 4 1 Troubleshooting Guide Power Problem Diagnosis Diagnostic Flow Chart Figure 3 2 The flow chart of Figure 3 2 illustrates a sequence of actions and decisions that might be used after the initial diagnosis of a total failure as a power supply or display problem NOTE If the apparent total failure is caused by a malfunctioning Cy display backlight it may be possible to observe a faintly lit display with the appropriate POST message The troubleshooting under these circumstances is described in this section C oy Figure 3 1 gt Total Failure e AE E se Connect Battery Eliminator Y Display Normal gt PS ee Examine display intensely N A faintly Y Visible Replace Battery Operational Circuits Battery LCD Return to Factory Replace Back light or Main Board Figure 3 2 Power Diagnosis Power Supply or Display 3 3 FETALGARD Lite Service Manual 3 4 2 Diagnostic Repair Actions Figure 3 2 3 5 3 5 1 3 4 Examine Display intensely Reduce background room illumination If o2. 13 2 LCD BACKLIGHT The LCD panel is a fluid monochrome LCD display It is a single panel display with a resolution of 76 800 pixels Data to be displayed are stored in the main board Direct connection to the LCD panel is made through on board header assembly J7 The backlight of the LCD is a CCFL Cold Cathode Fluorescent Lamp mounted as part of the LCD panel The ac high voltage is turned on and off by a digital control bit from the main board mounted drive 1 3 3 TOCO Channel The TOCO circuit uses a Wheatstone bridge with two strain gauge elements mounted on a load beam The differential output voltage is proportional to the force applied to the load beam through the plunger The TOCO circuit is powered from a single regulated 5V supply excitation The amplified and filtered TOCO signal is converted by a 12 bit analog to digital converter providing an output scale of 2 56LSBs gram 1 3 4 Serial VO Communications Port The RS232 interface is totally isolated from the main board through the use of high speed optical isolators and isolated 5 volt power supply The pinouts for the DB9 connector are shown in the table that follows 1 6 Introduction Table 1 1 RS232 Serial I O Connector Pinouts Pin Number Short ID Signal Description 1 Data carrier detect 2 Rx Receiver data 3 Tx Transmitter data 4 DTR Data terminal ready 5 Signal return 6 DSR Data set ready 7 RTS Request to send 8 CT
3. which should be connected with a cable of sufficient length to prevent the non medical equipment from contacting the patient 5 NOTE This chapter provides a guide to ensure a safe 2 2 environment in which qualified technical personnel may perform field servicing of the FETALGARD Lite monitors and recorders 3 Troubleshooting Guide 3 1 General This section provides a guide to the field service engineer technician in locating the possible cause of an apparent malfunction of the monitor or its accessories options Use of built in diagnostics flow charts and step by step procedures are provided as aids in the troubleshooting process The guide is intended to lead the servicing personnel to a probable field replaceable assembly or component Items that are serviceable only at the factory are also identified as well as instructions for their return for repair replacement The initial analysis determines whether the apparent malfunction is caused by a replaceable accessory option or by a replaceable assembly component within the monitor case 3 2 Required Tools Materials and Equipment Only 1 servicing tool is required to disassemble and remove and replace any field replaceable assembly A torque sensitive tool is required when reassembling the monitor Phillips head screwdriver Torque range to 10 in lb display resolution 1 in Ib Cy NOTE When reassembling be sure to follow torque limits inst
4. TOCO Range 0 100 relative units Resolution 1 Count Accuracy 1 1 relative unit Leakage lt 10 nA 264 VAC applied to transducer Isolation gt 4 kV RMS Type BF applied part Introduction 1 1 2 FETALGARD Lite Recorder Specifications Physical Characteristics Dimensions 12 4 cm 4 88 in H x 23 4 cm 9 20 in W x 26 7 cm 10 52 in D Weight approx 3 1 kg 6 8 lbs Safety Complies with EN60601 1 EN60601 1 1 EN60601 2 Class I Equipment requires 3 prong outlet with protective earth Continuous Operation Power 100 120V 50 60 Hz 0 4A 220 240V 50 60 Hz 0 24 Power consumption 20 watts maximum at nominal supply voltage Environmental Operating Temperature 10 C to 45 C 50 F to 110 F Storage Temperature 20 C to 60 C 29 F to 175 F Relative Humidity 20 to 90 non condensing 1 1 3 Definitions and Symbols Ultrasound Transducer Input Connector WS Toco Transducer Input Connector voy O Remote Marker Input Connector MARKER 1 3 FETALGARD Lite Service Manual b RS 232 RS 232 Connector O9 Battery Eliminator Connector SON IA IPX1 s Drip proof Equipment Classification Class II Equipment Symbol double insulation Per IEC 60601 1 Type BF Applied Part Symbol y Refer to Accompanying Documents e E Protective Earth IE Functional Earth Indoor Use Only 1 4 1 2 1 2 1 Device Description Genera
5. and push the switch out through the opening in the rear panel 5 5 2 To Reassemble the AC Switch Perform the steps of 5 5 1 in reverse order Torque the M5 Hex Nut for grounding 20 23 lb in WARNING Make sure ground lead green and yellow wire is intact and is connected properly to the chassis stud to insure proper safety ground AC Power Switch Figure 5 5 Accessing the AC Power Switch After releasing the snap fittings 5 5 FETALGARD Lite Service Manual 5 6 To Replace the AC Harness The AC Harness connects the ac power switch to the controller board and the ground stud on the chassis Figure 5 6 is a schematic wiring diagram illustrating the relationship of the ac harness leads to other components of the assembly Frame Drawer an CND Wire Gnd Screw AC Switch P4 I Chassis Gnd Ipe ps pp ML O pe p El Stepper Motor Cable 0 Paper Out Sensor Cable Print Head Cable il T Keypad Membrane Cable 11P3 Controller PCB Figure 5 6 AC Harness Wiring Schematic 5 6 2 To Remove the Harness 1 Remove the top cover as described in paragraph 5 3 2 At the ac switch remove the wire lead from the spade lugs on the switch 3 At the main board remove the wire lead from the spade lugs on the printed circuit board 4 Using an appropriate tool remove the M5 nut and washer assembly attaching the ground green and yellow lead from the ground stud on the chassis rear wall Re
6. housing for TOCO transducer FGMSP013 Housing includes label LCD Display Complete LCD Assembly and protective shield FGMSP014 Control Knob Front panel knob and sleeve FGMSP015 1 8 Introduction 1 4 2 FETALGARD Lite Recorder Table 1 3 FETALGARD Lite Recorder Spare Parts For FetalGard Lite Recorder Serial Numbers FB010001 thru FB 019999 Name Brief Description Analogic Ordering Number Cover Chassis cover cover FGRSPOJO 10 ESO PCB EE mounted transformer gt 1 AC Wire Harness Set FGRSP012 AC Receptacle Receptacle for input power FGRSP004 Bezel with keypad FGRSP005 Rubber Feet Rubber Bumper Feet With Screws FGRSP006 Internal Fuse FZ1 FZ2 5x20 cartridge type time lag fuse FGRSP007 100 120 Vac id Configuration Littlefuse type 239 400 or approved equivalent Internal Fuse FZ1 FZ2 5x20 cartridge type time lag fuse FGRSP008 220 240 Vac N Configuration Littlefuse type 239 200 or approved equivalent Paper Spacer Used for HP Paper only FGRSP013 1 5 Abbreviations Acronyms and Phrases The table that follows defines some of the abbreviated and special terminology that may be found in this manual Abbreviation Etc Definition Description APIS Antepartum monitoring of single fetus APIT Antepartum monitoring of twin fetuses HCS Home care monitoring of single fetus HCT Home care monitoring of twin fetuses TOCO Tocotonometry U S1 Ultrasound single fetus U S2 Ultrasound tw
7. of two main assemblies e A rear case assembly and e A front case assembly 4 2 Rear Case Access Figure 4 1 The rear case assembly consists of a molded plastic case in which the battery is stored Through holes in the case cover are provided for the main board mounted rear panel connectors 4 2 1 Battery Replacement p 9 ATA HARA BACK VIEW OF UNIT SHOWN WITHOUT BATTERY 000R A Figure 4 1 Accessing Rear Case Assemblies 4 1 FETALGARD Lite Service Manual 4 2 Remove the battery cover 1 Place the FETALGARD Lite on its front panel being careful not to place the unit on any surface that will mar the display 2 Using the Phillips head screwdriver unfasten the four screws holding the battery cover in place 3 Carefully lift off the back cover Remove the Battery 1 Position the monitor assembly on its underside This will cause the open rear of the case to tilt towards the tabletop and thus allow gravity force to aid in removing the battery 2 While monitor is in this tilted position manually press the battery to move towards the terminal side The gravity force should cause the battery side opposite the terminals to fall partly out of the case See Figure 4 2 Figure 4 2 Monitor Tilted Battery Removal in Process Carefully remove the battery from the monitor Use care in removing the battery wires They are connected to the front case side of the main boa
8. older Figure 3 3 Monitoring Degradation Diagnostic Flow Chart 3 5 2 Diagnostic Repair Actions Figure 3 3 Describe Degraded Performance Replace Main Board Assembly Examine the display after an apparently successful power up sequence and self test Consider first the appearance of artifacts gaps or general quality of the display Note the values being reported in the numerical frames FHR s and TOCO Are they clearly unreasonable 3 5 FETALGARD Lite Service Manual 3 6 Swap Cables It is assumed that a set of spares is available from which the spare cable may be used Assume that the spare is a factory qualified defect free spare At facilities where more than one FETALGARD Lite is installed it may be more convenient to borrow a cable assembly that was part of a satisfactorily operating FETALGARD Lite monitor Replace Main Board Assembly Refer to Section 4 Monitor Disassembly Reassembly for step by step instructions 4 Monitor Disassembly Reassembly 4 1 General This section contains instructions for the disassembly of the FETALGARD Lite monitor Step by step instructions are supplemented with appropriate illustrations and line drawings Refer to Section 1 for a listing of the assemblies and components that are included within the list of spare parts Disassembly Reassembly instructions for the FETALGARD Lite Recorder are contained in Section 5 In brief the monitor is comprised
9. sink and transistor U2 5 7 FETALGARD Lite Service Manual 7 Disconnect the ribbon cable that connects the main board to the printer assembly 8 Disconnect the motor cable and sensor cable at the Main Board 9 Carefully lift the main board up out of the chassis 5 7 2 To Reassemble Main Board Follow steps of paragraph 5 7 1 in reverse order Torque M3 U2 Transistor Clip Hex Nut 6 8 Ib in Torque M3 PCB and Transformer Screws 6 8 lb in Torque 3 16 inch Hex 4 40 I O Connector Standoff Screws 4 5 lb in Torque M5 AC Power Switch Grounding Hex Nut 20 23 Ib in Torque M3 Cover Bumper Feet Screws to 3 lb in Torque M3 Rear Cover to Chassis Feet Screws 6 8 Ib in 5 8 6 System Retest 6 1 General After repair and or replacement of any part of the FETALGARD Lite monitor it is essential that the system be retested to assure both functionality and safety The functionality test requires the operation of the monitor in a Demo mode and verifying the specified responses in the numeric frames and in the trend graphic waveform The safety test requires the use of appropriate test equipment to verify the monitor s specified response to a hi pot test 6 2 Functionality Test Refer to the FETALGARD Lite Operator s Manual e Turn the monitor ON Verify that the monitor screen indicates readiness no error messages e Check to see that there is more than 50 of the battery charge shown in the battery icon Connec
10. FETALGARD Lite for Precision Signal Technology FETALGARD Lite Service Manual 2000 Analogic Corporation 8 Centennial Drive Peabody MA 01960 Tel 978 977 3000 Proprietary Material Information and descriptions contained in this manual are the property of Analogic Corporation and may not be copied reproduced disseminated or distributed without express written permission from Analogic Corporation Information furnished by Analogic Corporation is believed to be accurate and reliable However no responsibility is assumed by Analogic for 1ts use or any infringements of patents or other rights of third parties that may result from its use No license is granted by implication or otherwise under any patent or patent rights of Analogic First Printing August 2000 Second Printing March 2002 Part Number 16 00001 01 REV 00 FETALGARD Lite Service Manual iv How to reach Analogic for additional information Mail addresses USA Analogic Corporation Life Care Systems 360 Audubon Road Wakefield MA 01880 Telephone s 978 977 3000 ext 2333 Fax 781 245 1274 E mail lifecare analogic com Web page www analogic com l Table of Contents Introduction naar Re easelsiinnitins 1 1 1 1 General ne sales 1 1 1 1 1 FETALGARD Lite Monitor SpecificatiOWS ocococonnoccnnnnconnconnconnnconnc ns 1 1 1 1 2 FETALGARD Lite Recorder Specifications eeenennneene 1 3 1 1 3 Definitions and Symbols cris 1 3 1 2 Devi
11. LGARD Lite Service Manual 1 4 Replaceable Spare Parts 1 4 1 FETALGARD Lite Monitor Single Fetus and Twin Fetuses Table 1 2 FETALGARD Lite Monitor Spare Parts Name Brief Description Analogic Ordering Number Front Case Assembly Includes Keypad and Speaker Assembly FGMSP001 Rear Case Assembly Includes Battery door FGMSP002 F GN GN From Main Board to Battery Includes terminations GN 6 Volts Lead acid rechargeable FGMSP005 Main Board Assembly Complete assembly for AP1S HCS FGMSP006 for Single Fetus no replaceable subassemblies Monitoring Main Board Assembly Complete assembly for AP1T HCT FGMSP007 for Twin Fetuses no replaceable subassemblies Monitoring U S1 Ultrasound cable assembly for use with Models FGMSP008 APIS and HCS includes transducer cable assembly and replacement label U S1 amp 2 Ultrasound cable assembly for use with Models FGMSP009 APIT and HCT includes transducer cable assembly and replacement label U S2 Ultrasound cable assembly for use with Models FGMSP010 APIT and HCT includes transducer cable assembly and replacement label TOCO B 6 Pressure Transducer Cable includes transducer FGMSP011 cable assembly and replacement label U S Transducer Top Replacement top housing for U S transducer FGMSP012 Housing includes label U S Transducer Top Replacement of old style top housing w new FGMSP016 Housing w LED Board style top housing includes LED board and label TOCO Transducer Top Replacement top
12. Lite Functional Block Diagram neenene 1 5 Figure 3 1 Diagnosing Malfunction Initial Diagnosis ennenenne 3 2 Figure 3 2 Power Diagnosis Power Supply or Display eeeee 3 3 Figure 3 3 Monitoring Degradation Diagnostic Flow Chart eeene 3 5 Figure 4 1 Accessing Rear Case Assemblies cccccsccssseceseceseceeeeeescecsseceseeeeneenaees 4 Figure 4 2 Monitor Tilted Battery Removal in Process nnennen 4 2 Figure 4 3 Accessing Front Case AssemblieS oooococinncnnocinocnnoonconncconoconoconnnonnncconocnnos 4 4 Figure 5 1 FETALGARD Lite Recorder Strip Chart Loading Configuration 5 2 Figure 5 2 Removing Rubber Fett une se vassacdsctaaseaedasiocasbiccsnicaies 5 3 Figure 5 3 Top Cover Removed Partaloa ide 5 3 Figure 5 4 Accessing Internal Fuses aus ee ai 5 4 Figure 5 5 Accessing the AC Power Switch After releasing the snap fittings 5 5 Figure 5 6 AC Harness Wiring Schematic ooooonooccnoccnoncconncconcconnnonnnonnccconocnnn cono nennen 5 6 Figure 5 7 Accessing the Main Board Assembly ooooconncnioconocococonoonnconcconnocancconnnonnnonnns 5 7 Tables Table 1 1 RS232 Serial VO Connector Pinouts u 1 7 Table 1 2 FETALGARD Lite Monitor Spare Parts ccccscssccssscssrcessnscseccssecennees 1 8 Table 1 3 FETALGARD Lite Recorder Spare Parts oooooonocninocinoncoocnnoncconncconocnnccon
13. S Clear to send 9 Unused 1 3 5 Keypad amp Knob There are 7 front panel switches two LED s and one knob push button switch All ofthese buttons go to the main board except for the ON OFF push button which goes directly to the power supply The software monitors these signals to determine which buttons were pushed The two LED s are located on the control panel and inform the user of ac present or battery operation The knob consists of a mechanical rotary encoder knob with a momentary push button switch As the knob is rotated quadrature coded outputs are generated The phase relationship between the two signals in quadrature reflect the clockwise or counter clockwise rotation ofthe knob This relationship is translated to move the cursor on the LCD display forward or backward depending on which way the knob is rotated 1 3 6 Power Supplies The unit is operated from a 6 volt 4 AH sealed lead acid battery The battery charger provides enough power to charge the battery even when the unit is operating The FETALGARD Lite power is controlled by alternate button closures of the front panel membrane switch Unit operation starts only via a push of the front panel button but operation will stop after a delay of approximately 15 seconds when pushing the front panel membrane switch This delay permits the main board processor to shut down in an orderly fashion after storing the parameters and data if any 1 7 FETA
14. ce Deserpionav asus asus 1 5 1 2 1 General ae 1 5 1 2 2 Block DIAS PANT doo 1 5 1 3 Mechanical Desci pins ices aaeweees 1 6 1 3 1 FHR Chama died 1 6 1 3 2 LEDS BACKLUGH Edad is 1 6 1 3 3 A AS 1 6 1 3 4 Serial I O Communications POflt oooooononccinccnonaconncconoconn cono ncon noc nocnncnnnnno 1 6 1 3 5 Kevpad amp Dia 1 7 1 3 6 Power SUP DHS a is oir 1 7 1 4 Replaceable Spare AAA Qanauanca mee ceapeunacsmeeecuroes 1 8 1 4 1 FETALGARD Lite Monitor Single Fetus and Twin Fetuses 1 8 1 4 2 FETALGARD Lite Recorder unto 1 9 1 5 Abbreviations Acronyms and Phrases ooonoocnncccnoccconccconoconaconnnono nono nono nocnoss 1 9 SE ne ee ne ee 2 1 2 1 General air se 2 1 2 2 Warnings Cautions and N te sa aaa ek 2 1 233 WARNINGS eksnaine eaer E tE EE ANA EEE TEN a EEEE ATOE nA 2 1 DAE A a A a a 2 2 29 NOTES AE E AE EE AER 2 2 Tro bleshooting Guide tb 3 1 3 1 General sre een E E A E 3 1 3 2 Required Tools Materials and Equipment oooooccnnncccocococcconcnonnncnnncann cono cc nnonnn 3 1 3 3 Initial Trouble Diagnosis aiii ds 3 1 3 4 Power Problem Dias lia 3 3 3 4 1 Diagnostic Flow Chart Figure 3 2 ooooococinoconococonncinnconncconocnnncnnncc nnonns 3 3 3 4 2 Diagnostic Repair Actions Figure 3 2 censensesnennennnnennennnn 3 4 3 3 Monitoring Degradation Problems u0snsnsensnnesnenennennnennnnennn 3 4 3 5 1 Diagnostic Flow Chart Figure 3 3 ooooonccnnncnnococonoconnconncconocnnnconnnconnc
15. e the control knob before the main board is freed from the case 1 Disconnect the connection at J5 upper left corner of the board to the speaker assembly 2 Disconnect the flat ribbon cable that is routed from the front panel keypad under the main board to the connector To remove the cable from the connector first release the locking cap to loosen the cable Slide the cable out leaving the cap loosely seated in the connector 3 Connection at J5 to the battery may remain because the other ends have been disconnected from the battery Monitor Disassembly Reassembly 4 Connections at J4 of power to the backlight of the display may remain until 1t is necessary to remove LCD display 5 At the front panel remove the control knob by pulling it from the case 6 Using a Phillips head screwdriver remove the screw that fastens the main board assembly to the front case Remove the main board assembly The LCD display remains fastened to the board through connector J7 and the backlight power at J5 It appears as a daughter Board for the main board Reassemble Perform the removal steps in reverse order Use care when routing the connecting cables Use the notches along the edges ofthe main board to keep the cables from interfering with other components or from introducing an interference difficulty when fastening the main board in place 4 5 5 Recorder Disassembly Reassembly 5 1 General This section contains instructi
16. in fetuses 1 9 2 Safety 2 1 General NOTE This chapter provides a guide to ensure a safe Cy environment in which qualified technical personnel may perform field servicing of the FETALGARD Lite monitors and recorders This manual contains instructions for troubleshooting and performing field service repair of FETALGARD Lite Models APIS APIT HCS and HCT as well as the FETALGARD Lite Recorder It also contains troubleshooting guides for the replacement of malfunctioning accessories and options 22 Warnings Cautions and Notes The terms warning caution and note have specific meanings as used in this manual A WARNING advises against certain actions or situations that could result in personal injury or death A CAUTION advises against actions or situations that could damage equipment produce inaccurate data or invalidate a procedure Cy A NOTE provides useful information regarding a function or procedure 2 3 WARNINGS WARNING EXPLOSION HAZARD Do not use the FETALGARD Lite in a flammable atmosphere where concentrations of flammable anesthetics or other materials may occur WARNING SHOCK HAZARD The power receptacle must be a three wire grounded outlet A hospital grade outlet is required Never adapt the three prong plug from the Battery Eliminator or accessory to fit a two slot outlet If the outlet has only two slots make sure that it is replaced with a three
17. l Introduction The device description included in this chapter focuses on the functional performance of the replaceable assemblies that may be identified as the probable cause of an apparent malfunction Refer to the Operator s Manual for information about the operation of the FETALGARD Lite and of the FETALGARD Lite Recorder That manual includes descriptions of the installation and setup as a stand alone monitor or as part of a local network modes of operation recording of real time patient data and transmission of patient data to local or remote PCs 1 2 2 Block Diagram Figure 1 1 illustrates the functional operation of the FETALGARD Lite including the accessories and options It incorporates features of the mechanical design indicating the physical relationship of the assemblies and components Case Front Cover N FE EEE RENE RE EEE EEERIRE ER En Assembly SES a U S1 A Speaker FR ON U S1 amp 2 EEES E le J QU Main Board Assy es LCD IRAN FHRCODEC gt FHR E Display isplay Control lt Processing le gt U S2 NR TOCO A D E En ge 3 gt TOCO A TOCO Processing Seu Knob Co
18. mbled with each screw for later replacement 3 Slide the cover to the rear Remove 1 Top Cover 4 Rubber Bumper Feet with 4 Screws N evo 0 5 2 Fastening Screws N for Rear of Cover Figure 5 3 Top Cover Removed Partially 5 3 2 To reassemble the cover Perform the 4 steps above in reverse order Torque M3 Screws in Rubber Bumper Feet to 31b in Torque M3 Screws on rear of Cover to rear of Chassis 6 8 Ib in 5 3 FETALGARD Lite Service Manual 5 4 To Replace Internal Fuses There are two field replaceable fuses on the FGL Recorder Main Board assembly They are held in clip style fuse holders mounted on the printed circuit board beneath the ac power input switch Remove Top Cover only as described on paragraph 5 3 to access See Figure 5 4 Figure 5 4 Accessing Internal Fuses 5 4 Recorder Disassembly Reassembly 5 5 To Replace the AC Power Switch The AC Power Switch is press fit with integral plastic snaps in the chassis rear panel 5 5 1 To Remove the Switch 1 Remove the top cover as described in paragraph 5 3 2 Locate the power entry module Figure 5 5 3 Remove the wire leads connected to the three terminals of the switch 4 Using an appropriate tool remove the M5 nut and washer assembly attaching the ground green and yellow lead from the ground stud on the chassis Retain for later reassembly 5 From the inside of the switch press the two sides together to release the press fit snap arm
19. nly the back light fluorescent tube or its high voltage driver has failed the display may be faintly visible Refer to Section 4 for removal procedures Replace Battery Refer to Section 4 for step by step procedure Replace Main Board Refer to Section 4 for step by step procedure Monitoring Degradation Problems Diagnostic Flow Chart Figure 3 3 Figure 3 3 illustrates a logical sequence of troubleshooting diagnostics when the FETALGARD Lite monitor appears to be operative but the displayed results are suspect for any number of reasons The resulting diagnosis will result in replacing either the main board spare parts or the offending cable with sensor attached Troubleshooting Guide C Start gt Describe Degraded Performance Y U S Channel s OK Selelct Demo Mode Y Channel U S Channel s OK Swap TOCO end PIY cable with good spare OCO Channel Replace Main Board Assembly OK Replaced Cable is Faulty Use spare cable Repair older No apparent degradation Replace Main Board Assembly Processing Circuits are Faulty Replace Main Board Assembly Swap U S cable s with good spare s U S Y Channel s OK Replaced Cables are Faulty Processing Circuits are Faulty Use spare cable s Repair
20. nnn 3 4 332 Diagnostic Repair Actions Figure 3 3 oooonccnnnccnocociccconncconoconnconnncnnnonos 3 5 M nitor Disassembly Reassembly a s 0 een 4 1 4 1 Generale ah sen nalen 4 1 4 2 Rear Case Access A e ed 4 1 4 2 1 Battery Replacement uses ann een eng 4 1 4 2 2 Rear Case Replaeement ine 4 3 4 3 Front Case Access Figure IB sale aa 4 4 4 3 2 Main Board Assembly ans eee as 4 4 FETALGARD Lite Service Manual 5 Recorder Disassembly Reassembly nin ne 5 1 5 1 A e ai a a a a sada dade nected tae ais 5 1 5 2 Required Tools Materials and Equipment ooooonnncnococononinnnonnnconocnnnnonnnconnnnnn 5 1 5 3 To Replace the Top COVE A AA it 5 2 5 3 1 To remove the cover Figure 5 2 and Figure 5 3 5 2 5 3 2 To reassemble the CVs 5 3 5 4 Do Replace Internal Pr a a ote 5 4 5 5 To Replace the AC Power Switch u a 5 5 5 5 1 To Remove the AAA An 5 5 5 5 2 To Reassemble the AC Switch uses 5 5 3 0 To Replace the AC Ham al 5 6 5 6 2 To Remove The HE a en 5 6 5 6 3 To Reassemble the AC Hare Scion ck nen nern 5 6 5 7 To Replace the Main Board Assembly oooonnnccnnocinocononcconcconnononacanonancc nannnn 5 7 5 71 To Remove the main Board Assembly o ooonocccccccnoccconccconacinnnonnnconccnnno 5 7 5 7 2 To Reassemble Main Borris il ia 5 8 IS A A ON 6 1 6 1 A A ek 6 1 6 2 Functionality A E cn gta ete es ERRE 6 1 6 3 A Pe RE een Era 6 1 Illustrations Figure 1 0 FETALGARD Lite Monitor and Recorder vii Figure 1 1 FETALGARD
21. nno 1 9 vi Preface io E N 32 y 20 E Figure 1 0 FETALGARD Lite Monitor and Recorder vii 1 Introduction 1 1 General The FETALGARD Lite Service Manual supplements the operator maintenance and troubleshooting procedures included in the FETALGARD Lite Operator s Manual Refer to the Operator s Manual for maintenance and troubleshooting procedures that may be performed during normal operation Maintenance and repair of the monitor beyond the level normally accomplished during operation are limited to the replacement of the battery to replacement of the board assembly within the case to replacement of the speaker and to components of the LCD display installed in the case front cover assembly Procedures for isolating the probable cause of apparent malfunction to these assemblies are contained in this manual This manual also includes the troubleshooting guide for replacement of accessories and options The information in this FetalGard Lite Service Manual applies to FGL System Assembly Serial Number FA000001 thru FA99999 and FGL Recorder Serial Number FB010001 thru FB019999 For FGL Recorder Serial Number FB000001 thru FB009999 refer to FetalGard Lite Service Manual APN 16 400809 CAUTION Only qualified technical personnel should attempt to carry out any disassembly removal and replacement of internal assemblies NOTE Information included in this manual describes options om and acce
22. ntrol LU Knob Sense Remote R M e Mak Actuator Processing Control VO NE Buttons amp di Port gt Memory Power Leng Batt Batt To AC att attery o Elim Eliminator I Source Y Battery SS are I Charging gt Battery Power Supply A Case Rear Cover Assembly aes a a a ad Figure 1 1 FETALGARD Lite Functional Block Diagram FETALGARD Lite Service Manual 1 3 Mechanical Description As indicated in Figure 1 1 except for the battery all functioning components of the monitor are installed as subassemblies of the case front cover assembly The case rear cover assembly includes the replaceable battery The rear cover provides openings through which the five main board mounted rear panel connectors are accessible Additional mechanical features are included in Chapter 4 Disassembly 1 3 1 FHR Channel Either the single fetus U S1 patient cable Models AP1S HCS or the twins U S1 amp 2 patient cable Models APIT HCT is connected to the rear panel FHR connector The U S2 patient cable when used is connected as shown to the U S1 amp 2 cable assembly for Models APIT and HCT The transmitter s pulsing the ultrasound transducer s is are gated by control circuitry and return signals are processed in the CODEC circuitry on the main board Signals to the flashing LED on the transducer assembly and to the FHR icon in the display are transmitted in synchronism with the beat detection
23. ons for the disassembly of the FETALGARD Lite Recorder Step by step instructions are supplemented with appropriate illustrations and line drawings Refer to Section 1 for a listing of the assemblies and components that are included within the list of spare parts Disassembly Reassembly instructions for the FETALGARD Lite Monitor are contained in Section 4 In brief the recorder is comprised of two main assemblies e A print mechanism assembly and e A controller board assembly Proper operation of the print mechanism assembly requires precise alignment of mechanical components The process requires tools not normally available for field replacement Thus the spare parts for the FETALGARD Lite Recorder do not include any components of the print mechanism WARNING Disconnect ac power cord from the FETALGARD Lite Recorder Allow 30 seconds for all capacitors to be discharged 5 2 Required Tools Materials and Equipment Servicing tools are required to disassemble remove and replace any field replaceable assembly A torque sensitive tool is required when reassembling the recorder Phillips head screwdriver for M3 screws M3 Screws to be tightened to 6 8 Ib in unless otherwise specified Nut Driver or equivalent wrench for M5 Hex Nut M5 Nut to be tightened to 20 23 Ib in Nut Driver or equivalent wrench for M3 Hex Nut M3 Nut to be tightened to 6 8 Ib in Nut Driver or equivalent wrench for 3 16 inch He
24. r remove the four screws fastening the rear case to the front case assembly 4 Lift the rear case off the monitor Reassembly 1 Place the rear case on the front case making sure that the battery leads enter the battery compartment in the rear case 2 Using a Phillips head screwdriver fasten the rear case to the front case assembly with the four screws 3 Torque to a force of 6 to 8 in Ib 4 Reconnect the battery and install it in the rear case 5 Fasten the battery door to the rear case Torque to a force of 6 to 8 in Ib CAUTION Do not over torque 4 3 FETALGARD Lite Service Manual 4 3 Front Case Access Figure 4 3 The front case assembly includes the replaceable molded front case the main printed circuit board the LCD display assembly and the knob assembly The speaker assembly and the front panel keypad are provided as part of the replacement front case To access the front case assemblies remove the rear cover assembly Follow the procedures of paragraph 4 2 Disconnect the leads to the battery NOTE The illustration includes disassembled parts that are not recommended for field replacement Figure 4 3 Accessing Front Case Assemblies 4 3 2 Main Board Assembly 4 4 Removal The procedure requires disconnecting some of the cables that connect main board circuitry to other assemblies before removing the screw that fastens the board to the front case It is also necessary to remov
25. rd assembly and those connections may be damaged if the wiring is mishandled Monitor Disassembly Reassembly 4 Remove the wire connections from the battery terminals by sliding the spade connectors off the terminals Note that the battery case adjacent to the positive terminal is painted red to identify the required connection of the red wire to that terminal Reassembly 1 Connect power leads to replacement battery Note that the red wire is connected to the positive terminal that also is identified by the red painted case adjacent to the terminal 2 Carefully place the new battery in its position in the case 3 Replace the back cover 4 Torque each of the four screws to 6 8 in lb CAUTION Do not over torque Battery Disposal Refer to practices and procedures developed at the local institution when disposing the used battery NOTE Federal state and local agencies may require adherence Cy to special procedures for disposal of lead batteries Be sure that the local practice conforms to these requirements 4 2 2 Rear Case Replacement Removal 1 When replacement of the rear case is required first remove the battery as described in the previous paragraph 2 Ifthe replacement is to include the battery door fasten the battery door in place using the four screws Ifthe case is to be replaced without the battery door place the door aside for later installation 3 Using a Phillips head screwdrive
26. ructions Excessive torque may damage the plastic case etc 3 3 Initial Trouble Diagnosis The first step in diagnosing a possible malfunction is to duplicate if possible the symptoms of the reported malfunction Thereafter it is important to categorize the problem as either one of two types as illustrated in Figure 3 1 They are e Totally inoperative condition or e Degraded operation The totally inoperative condition is indicated by the failure of the monitor to respond to the power ON front panel action or by complete loss of monitoring functions during operation Degraded operation performance might be indicated by the appearance of artifacts in the display or by gaps in the pixel display by intermittent actions or by obviously inaccurate measures of fetal activity etc 3 1 FETALGARD Lite Service Manual Start Power ON Initial Diagnosis Totally N A Y Monitoring Problem Power or Display Problem Figure 3 3 Figure 3 2 Figure 3 1 Diagnosing Malfunction Initial Diagnosis The diagnostic flow charts contain a few standardized graphic symbols Direction to replace a From Earlier or zz designated assembly To Next Figure Replacement Start EAR 2 Action Direction to Logical conclusion servicing after performing the technician A previous diagnostic Diagnostic procedures Conclusion E Action
27. slot grounded outlet before attempting to operate the monitor WARNING SHOCK HAZARD Do not attempt to connect or disconnect a power cord with wet hands Make certain that your hands are clean and dry before touching a power cord 2 1 FETALGARD Lite Service Manual 2 4 CAUTIONS 2 5 NOTES WARNING Use only patient cables and transducers supplied with the monitor Use of any other patient cables may result in out of specification performance and possible safety hazards CAUTION Use care when transporting or moving the monitor to assure that the attached patient cables are stored so that they will not be damaged in the move CAUTION Keep the operating environment free of dust vibrations corrosive or flammable materials and extremes of temperature and humidity The unit should be kept clean and free of transducer gel and other substances CAUTION Do not operate the unit if it is damp or wet because of condensation or spills Avoid using the equipment immediately after moving it from a cold environment to a warm humid location CAUTION Never use sharp or pointed objects to operate the front panel switches CAUTION General purpose personal computers and modems are not designed to meet the electrical safety requirements of medical devices The RS 232 connector on the FETALGARD Lite is electrically isolated to permit safe connections to non medical devices
28. ssories that may not be installed in your equipment Consult your configuration listing for those that apply to your unit 1 1 1 FETALGARD Lite Monitor Specifications Physical Characteristics Dimensions 18 cm 7 1 inches H X 24 2 cm 9 5 in W X 13 cm 5 1 in D Weight approx 1 9 kg 4 2 lbs Safety Complies with EN60601 1 EN60601 1 1 En60601 2 Class II Equipment double insulated Continuous Operation Type BF applied parts 1 1 FETALGARD Lite Service Manual Internal Lead acid rechargeable 2 hours operation fully charged at 10 C 14 hours to full recharge during monitoring 8 hours to full recharge when monitor is off External AC powered Battery Eliminator two models BAT ELIM A 100 120V 50 60 Hz 0 15A BAT ELIM B 220 240V 50 60 Hz 0 084 Power Dissipation Battery powered 6 watts maximum AC powered 10 watts maximum Environmental Operating Temperature 10 C to 45 C 50 F to 110 F Storage Temperature 20 C t 60 C 29 F to 175 F Relative Humidity 20 to 90 non condensing Altitude 0 3048m 0 10 000 ft Doppler Ultrasound FHR Monitoring Parameter Value Intensity lt 10 mW cm ISATA BPM Range USA Paper 50 240 BPM International Paper 50 210 BPM Accuracy 1 1 BPM Leakage lt 10 pA 264 VAC applied to transducer Isolation gt 4 kV RMS Type BF applied part Tocotonometer Uterine Activity TOCO Monitoring 1 2 Parameter Value
29. t the battery eliminator if required e Connect the U S and TOCO cables Check to see that the display reflects the attachments in the appropriate frames e Using the Control Knob update the Date Time frame Verify that the display responds correctly e Using the Control Knob select the Demo Mode of operation Verify that the display responds with the dynamic variation in the numeric frames and the generation of the trend in the graphic frame e Using the front panel keypad buttons verify the proper response to their activation e Leave the Demo Mode and return to normal monitoring action 6 3 Safety Test Follow the Health Care institution requirements and procedures to assure the monitor safety by performing the appropriate Hi Pot tests 6 1 Analogic Corporation Life Care Systems Division 360 Audubon Road Wakefield MA 01880 USA Tel 978 977 3000 Fax 781 245 1274 APN 16 00001 01 REV 00 ANALOGIC Em The World Resource for Precision Signal Technology
30. tain for later reassembly 5 Remove the AC Harness set 5 6 3 To Reassemble the AC Harness Perform the steps of paragraph 5 6 2 in reverse order Torque the M5 Hex Nut for grounding 20 23 lb in 5 6 Recorder Disassembly Reassembly 5 7 To Replace the Main Board Assembly 5 7 1 To Remove the main Board Assembly 1 Remove the top cover as described in paragraph 5 3 2 Remove the AC Harness assembly as described in paragraph 5 6 Heat Sink Nut Hardware 1 of 4 Do Not Remove Ground Nut AC Power Switch Power Transistor Nut and Clip Transformer Screw Hardware 1 of 4 I O Connector Main PCB Screw Hardware 1 of 4 Figure 5 7 Accessing the Main Board Assembly 3 Using an appropriate tool remove the two 3 16 hex 4 40 female screw lock standoffs that fasten the I O connector to the chassis rear panel 4 Using an appropriate tool remove the four 4 M3 X 8mm Phillips head screws and washers that fasten the main board to standoffs in the chassis See Figure 5 7 5 Using an appropriate tool remove the four 4 remaining M3 X 40 mm Phillips head screws and washers that fasten the transformer through the main board to standoffs in the chassis 6 Using an appropriate tool or M3 nut driver dislodge and remove the plastic clip that holds the power transistor against the heat dissipation assembly of the rear chassis Do not remove the Heat Sink nuts in the corners CAUTION Insulator is used between heat
31. x 4 40 Male Female Standoff 4 40 Standoff to be tightened to 4 5 Ib in Cy NOTE When reassembling be sure to follow torque limits instructions 5 1 FETALGARD Lite Service Manual Figure 5 1 FETALGARD Lite Recorder Strip Chart Loading Configuration 5 3 To Replace the Top Cover Removal of the top cover is required to obtain access to internal assemblies of the Recorder Refer to Figure 5 2 and Figure 5 3 5 3 1 To remove the cover Figure 5 2 and Figure 5 3 The wrap around cover is held in place by four screws attaching it to the underside of the chassis and two screws attaching it to the rear of the chassis 1 Using an appropriate Phillips screwdriver tool unfasten the four 4 M3 X 8mm long screws in the center of each rubber bumper foot attaching the cover to the underside of the chassis NOTE The rubber bumper feet are held in place by these four screws Cy Retain the screw bumper foot assemblies for replacement Do not remove the four screws on the underside of the chassis that do not have the rubber bumper foot on them 5 2 Recorder Disassembly Reassembly 2 Fastening Screws Do Not Remove These Screws for Rear of Cover 4 Places Rubber Bumper Feet Screw Fastened Figure 5 2 Removing Rubber Feet 2 Using an appropriate phillips screwdriver tool unfasten the two 2 M3 X 8mm Long screws attaching the cover to the rear ofthe chassis Retain the lock washer and flat washer asse
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