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Service Manual - Frank`s Hospital Workshop

1. s masa e s 90009 Self Test failure Front End 1 Replace Power PCA 2 Replace Parameter PCA 3 Replace Control PCA 9000A Lithium backup battery failure 1 Replace lithium battery 2 Replace Control PCA A0000 A7FFF Data Card failure 1 Replace Data Card 2 Replace Control PCA A8000 AFFFF Data Archival error Replace Control PCA B0000 BFFFF Audio failure Replace Control PCA F0000 F0001 RAM ROM failure Replace Control PCA F0002 Demo Mode failure Replace Control PCA F0003 Keyscanner failure 1 Replace Keyscan PCA 2 Replace Control PCA F0004 System Communication error Replace Control PCA M4735A Service Manual 3 11 General Problems System Messages System messages remain on the display until the specified action is taken or no longer relevant They are intended for the end user and appear in the User s Guide A subset of the available messages is duplicated here for the reference of the service person NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 3 System Messages Message Configuration Lost Description The configuration is reset to the default settings Corrective Action 1 Reconfigure the M4735A 2 If problem reoccurs service the unit S
2. 4 5 Printer Assembly srecen ees macte u DOMUI Meetup Ge at De teadE E E 4 6 Battery COV GE M S 4 10 M in FUSE sarasssnaieuunneunsussanedtnaases veuantadaneeanshia egantanedadassn taaasedveaasenanniddsonimasiennianaseaimnieswaisn 4 12 Battery Eject Assembly e 4 14 Data NR Mm airea aae N E E E 4 16 Energy Select s p A seirasosert enserido rr aC a rer EEES Ea E Etien aaoi 4 17 Paddle Holders miroir i E E E E A E 4 18 Labels irese agen a a a a e aa aae E 4 20 Label Descriptions Pe aiies 4 20 Removing and Replacing Labels estes anscecvesceeanetuciadesececntoscpvsaseciuecteanisbuacacecameatenvteceuuenss 4 22 Opening th C ase ec 4 24 Discharge the Power Supply Capacitors sssssessesesesessessresressessersrsrresseesrsrreseeseeseeesee 4 24 Separate th CASE A neesi rari a E a EEEREN EEEE EEEE REE 4 26 Discharge the Defibrillator Capacitor ssssssssseseeseesrresesresstrsrirressrrsrtereesressrseresressessees 4 30 Identifying Internal Subassemblies sseseseseeseesssesesseeserssesresstssrerrenstrstreeesressrseresresseseees 4 32 Internal Assemblies Top Case sssssesesseeesesessserssseesseseessresseresseeesssressereseeesssresseessee 4 33 Lithium Backup Battery EP SS 4 34 Control e e trea e e E A e actos aparece aan 4 36 Jnngnggr o 4 40 Ty dr Tr
3. Medical Response Center Tel 800 548 8833 Canada Eastern Region Central amp Western Regions Tel 800 361 9790 Tel 800 268 1221 Other International Areas Australia France Tel 131147 Tel 0803 35 34 33 Germany Italy Tel 0130 4730 Tel 0292 122999 Netherlands United Kingdom Tel 0 20 547 6333 Tel 44 344 36633 Belgium Tel 32 2 778 35 81 Equipment Information Use the table below to summarize information you ll need when calling for service Model Number Serial Number Location Dept Biomedical Warranty or Support Contract Number M4735A Service Manual 3 31 Calling for Service 3 32 Troubleshooting 4 Removal and Replacement Overview This chapter provides procedures for removing and replacing subassemblies of the M4735A Most of the subassemblies described are available as replacement parts However some of those described are not available and are included because they need to be removed to service other subassemblies For a complete listing of which subassemblies are available as replacement parts see Replacement Parts beginning on page 5 1 Chapter Contents The major sections of this chapter are as follows Section Page Servicing Notes 4 1 External Assemblies 4 4 Opening the Case 4 24 Internal Assemblies Top Case 4 33 Internal Assemblies Bottom Case 4 79 Closing the Case 4 99 Se
4. 3 Recharge the battery before use Elapsed Time 2 5 hours 1 The battery failed the test or 2 Record fail CT and the date on the Low Battery Time lt 10 minutes label on the bottom of the battery Discard the battery appropriately wo 2 40 Performance Verification and Safety Tests 3 Troubleshooting Overview This chapter provides information for troubleshooting problems with the M4735A Chapter Contents The major sections of this chapter are as follows Section Page Repair Philosophy 3 1 Equipment Required 3 1 Troubleshooting and Repair Methodology 3 2 Troubleshooting Tables 3 6 Calling for Service 3 31 Repair Philosophy The repair philosophy of the M4735A is subassembly replacement Exam ples of subassemblies are the printer the Control PCA and selected connec tors and other items Repairs that involve replacing individual components on a PCA are not supported CAUTION Individual component replacement should not be attempted outside of a fac tory authorized repair facility Component level repair is extremely difficult due to the extensive use of surface mount technology and the high parts den sity on the circuit boards Unauthorized component replacement can impair performance of the M4735A Equipment Required Troubleshooting requires the same test equipment as does Performance Verifi cation See Test Equipment on page 2 8 3 1 6 29 00 Troubleshootin
5. 4 42 Bezel Assembly d RO 4 48 Energy Select fs WM ciadie sieben e E dde bed ua Ru cdd dd iu tesa des 4 52 M m 4 53 Display Assembly de 4 54 Patam tet A WT P 4 56 SPO2Z qo c 4 58 ECG GMS ClO GN S 4 60 SPO CONNECTE o Ge cube OU e E NN DN HOP E 4 62 Speaker mor 4 64 AC Mas DI c a 4 66 ECG Out Sync Connector dM 4 69 P r nio Meee ee ne Cen een eRe CREO Rees ne ee Rees unten gene aE e er 4 70 Replacement Top Cas sescsc zasccdetnssvacad seed abaessctstenndctecdsaceeteiencseocleua sdedivasveie am eaugeleaiebuctss 4 75 Internal Assemblies Bottom Case csicacsvsapareovasiisytaskesesesnaanteansacesssnssnessansneasanaleaivens 4 79 Battery PCA WT ee Peer rere 4 80 Defibrillator Scu ivive 4 84 gu od d M 4 86 Ee digi a E 4 90 Patient Connector P R 4 94 Replacement Bottom Case osos ques oci guv is pad iu placct tantaque ede sedeo Det MOIS pidas 4 97 Closings the Case TT 4 99 vii Contents Replacement Parts OVerVleW sistent he ees edendi ids 5 1 Chapter C OBI iocos ihn irr rhe etie bebes tiles toL S beste EE Co quad e
6. Parameter PCA M4735 68140 Includes standoffs for SpOs PCA Battery PCA M3500 66130 Includes spring cables Main Fuse Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Other Electrical Assemblies These assemblies come with specific parts as noted Table 5 4 Other Electrical Assemblies Description Printer Assembly Part Number M4735 69520 Notes Display Assembly M4735 69552 Defibrillator Capacitor Assembly M3500 69564 Speaker Assembly M3500 69552 Includes speaker cable AC Power Module M4735 66020 Energy Select Switch Assembly M4735 69564 5 8 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Replacement Parts Electrical Assemblies Individual Electrical Parts These electrical parts are available separately Table 5 5 Individual Electrical Parts Description Part Number Notes Lithium Backup Battery 1420 0341 Also order cable tie wrap Table 5 10 to secure to Control PCA Main Fuse 25A 32V 2110 0250 Pkg of 5 M4735A Service Manual 5 9 Mechanical Assemblies 5 10 Mechanical Assemblies The following tables provide information about replacement mechanical assemblies Bezel Assembly The Bezel Assembly comes with the Main Key
7. Audio is distorted Damage to speaker label Speaker failure Control PCA failure Replace speaker label Replace Speaker Assembly Replace Control PCA Buzzing noise when audio active Damage to speaker label Debris between speaker and speaker label Speaker hardware loose Speaker failure Control PCA failure Replace speaker label Remove speaker label clean out debris install new speaker label Tighten hardware as needed Replace Speaker Assembly Replace Control PCA Tones present but no voice prompt in AED Mode Control PCA failure Replace Control PCA Voice prompt present but no tones Control PCA failure Replace Control PCA M4735A Service Manual 3 27 Operational Problems Keys The following table covers problems that might arise with the keypads NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 14 Operational Problems Keys Symptom One of the keys doesn t respond Possible Causes Key failure Keyscan PCA failure Control PCA failure More than one of the keys or all of the keys don t respond Keyscan PCA failure Control PCA failure Keypanel failure Suggested solution Diagnose as follows In Diagnostic Mode run Controls test and identify all unresponsive keys Some keys d
8. Source Normal Condition lt 10 uA C lt 100 uA B Record as ccc Source Single Fault Condition lt 50 uA C lt 500 uA B Record as ddd With Mains on Applied Part Single Fault Condition lt 50 uA C 5000 uA B Record as eeee Auxiliary Normal Condition 10 uA C 100 uA B Record as fff Auxiliary Single Fault Condition 50 uA C 500 uA B Record as ggg 2 39 Performance Verification Battery Capacity Test The Battery Capacity Test is not part of the routine Performance Verification It is included here for reference only To perform a Battery Capacity Test 1 2 Turn the M4735A off Label the unit Place a Test in Progress label on the unit to indicate to others that it may not be used Insert a charged battery If an AC power cord is connected unplug it now Run the test a While pressing Mark turn power on to start the test b Allow the test to proceed to completion The test takes approximately three hours and is complete when test results print out and the device turns itself off Check results Review the test results and take the appropriate action as follows Table 2 3 Battery Capacity Test Results If Then Elapsed Time gt 2 5 hours The battery passed the test and Record pass CT and the date on Low Battery Time gt 10 minutes the label on the bottom of the battery n2
9. a Starting stopping pacing b Controlling Rate and Output as selected by user and monitor ing pacing current delivered Control of the ECG front ends on the Parameter PCA Leads ECG and Power PCA Paddles Pads ECG Generation and regulation of the 5 volt logic power supply Theory of Operation PCA Descriptions Power PCA The Power PCA performs the following functions e Analog front end for ECG from pads e Measurement of Patient Contact Impedance PCI e Generation and control of pacing waveforms as directed by Control PCA e Control of defibrillator functions as directed by the Control PCA a Charging the capacitor to the correct energy level b Delivering the shock and controlling the waveform c Disarming discharging the capacitor Parameter PCA The Parameter PCA performs the following functions e Interconnection site for ECG leads cable ECG out cable and SpO5 module e ECG analog front end for ECG from 3 5 lead cables e SpO2 on off logic and patient isolation Keyscan PCA The Keyscan PCA performs the following functions e Interconnection site for a All front panel keys b Energy Select Switch c All front panel LEDs Syne Pacer AC Power Batt Charge d IrDA interface e EL display data and control signals e Detecting and initial processing of front panel key presses e Pass through of Energy Select Switch signals e Interface for IrDA module used only in manufacturi
10. 5 Disconnect and remove the Keyscan PCA See Keyscan PCA on page 4 42 6 Remove the Bezel Assembly See Bezel Assembly on page 4 48 Removal 1 4 70 Flip the case over and remove the Pacer Keypad a Hlip the top case over rightside up Place it on the bottom case for support b Using needle nose pliers grasp one corner of the rubber overlay and pull up The overlay will peel up the membrane switches underneath may or may not come up with the overlay c If the membrane switches are still in place use a sharp tool such as a utility knife to pick up one corner then peel them up with needle nose pliers The membrane switches may peel apart into several layers be sure to remove all layers d Slide the 2 flex circuit tails out of the slot in the case Removal and Replacement Internal Assemblies Top Case Figure 4 35 Peeling up the Rubher Overlay Rubber Membrane Overlay Switches Figure 4 36 Peeling up the Membrane Switches Membrane Recess in Switches Case M4735A Service Manual 4 71 Internal Assemblies Top Case Replacement 1 Prepare the case a Clean off all adhesive residue from the case by rubbing the dry sur face with your finger and rolling up any adhesive TIP Lightly scoring the adhesive with a rounded tool will aid removal Solvents are ineffective as is scraping with a sharp tool NOTE The adhesive used is difficult to remove Take your time and do a thorough job
11. AC Line Filter 60 Hz On Leads FE Status Good Pads FE Status Good DSP Status Good DC Offset XXXX Peak to Peak Diagnostic 1050 Monitor 1090 PCI 51 Off 2 Check the settings a AC Line Filter The AC Line Filter should be set to the correct frequency for your area If the setting is incorrect access the Configuration Mode and correct it See Configuration Mode on page 2 10 2 29 Performance Verification b Selected Lead This setting does not matter at this point It will be changed later 3 Change the settings as needed a Totemporarily change the settings of Selected lead or AC Line filter press the A and W softkeys to highlight the parameter then press and release ENTER to select it NOTE The available choices for Selected Lead will depend on whether the unit is configured for 3 lead or 5 lead ECG monitoring b Afterafew seconds the highlighted selection will begin to blink and the A and W softkeys will allow you change the selection to another of the values available When the value you want is dis played press ENTER to set that value NOTE These changes are only temporary and will not override the configuration set in Configuration Mode 4 Check the ECG Status messages The 3 status messages Lead FE Pad FE DSP should all be GOOD e The Leads FE test checks that communication is working between the Leads Front End FE and the Digital Signal Processor DS
12. Defibrillator Test AC Power At 200 J These instructions describe how to test the defibrillation function when pow ered only by AC power no battery installed If all results are as described the unit passes the test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin troubleshooting and repairing the unit as needed See Troubleshooting on page 3 1 and Table 3 9 Operational Problems Defibrillation and Synchronized Cardioversion on page 3 21 1 Setup the test a Turn defibrillator off and remove the battery Connect the AC Power cord b Connect the defibrillator analyzer to the pads cable Set the analyzer to measure delivered energy If needed reset the analyzer s display to read 0 c Turn the defibrillator on and from the Diagnostic Menu Select the Defib Meas Test and press ENTER 2 Deliver a 200J shock a Use the Energy Select control to select 200J b Press the CHARGE softkey to charge the defibrillator c Press SHOCK 3 Check the analyzer readings Read the delivered energy indicated by the defibrillator analyzer It should be 200J 415 30J Record as aaa 4 Check the values displayed by the M4735A The results displayed by the M4735A should be as follows Available Energy Not recorded failure if gt 0 ms to Charge 15000 Record as bbbbb Delivered Energy Actual delivered energy aaa 7 Record as ccc Impedance 42 to 57 ohms R
13. Figure 4 38 Replacing the Rubber Overlay Rubber Membrane Overlay Switches M4735A Service Manual 4 73 Internal Assemblies Top Case 4 74 After Repair After repairs are complete perform the following steps 1 Replace the Bezel See Bezel Assembly on page 4 48 Replace the Keyscan PCA See Keyscan PCA on page 4 42 Replace the Shield Plate See Shield Plate on page 4 40 Replace and reconnect the Control PCA See Control PCA on page 4 36 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 Removal and Replacement Internal Assemblies Top Case Replacement Top Case The following sections describe how to remove and replace the Top Case Assembly Description The top case assembly consists of the following components all preassem bled into the case at the factory e Bezel gasket e IRDA lens e Printer ribbon cable e Case standoffs tall hex posts e Hole plug and gasket for SpO hole e Speaker label e Branding labels Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print th
14. Service Manual Verification Draft 29 June 2000 M4735A Defibrillator Monitor ma f reus Agilent Technologies Notice About This Edition Edition 1 Printed in the USA Publication number M4735 90900 The information in this manual applies to the M4735A Heartstream XL Release A 0 0 This information is sub ject to change without notice Agilent Technologies shall not be liable for errors contained herein or for inci dental or consequential damages in con nection with the furnishing performance or use of this material Edition History Edition 1 July 2000 Copyright Copyright 2000 Agilent Technologies Inc 3000 Minuteman Road Andover MA 01810 1099 USA 978 687 1501 This document may not be photocopied reproduced or translated to another lan guage without prior written consent of Agilent Technologies WARNING Radio Frequency RF interference from nearby transmitting devices may seriously degrade performance of the M4735A Electromagnetic compatibil ity with surrounding devices should be assessed prior to using the defibrillator CAUTION Use of supplies or accessories other than those recommended by Agilent Technologies may compromise product performance THIS PRODUCT IS NOT INTENDED FOR HOME USE IN THE U S FEDERAL LAW RESTRICTS THIS DEVICE TO SALE ON OR BY THE ORDER OF A PHY SICIAN Medical Device Directive The M4735A Defibrillator Monitor complies with the re
15. ence or low signal non pulsatile Event Storage Internal Event Summary The internal Event Summary stores up to 300 events and up to 50 waveforms Events can be marked with a Mark symbol and if configured for drug annota tion the following labels can be added Epinephrine Adrenaline in U K and Australia Atropine Lidocaine or Other The Summary key on the front panel is used to print the internal Event Sum mary Data Card Event Summary The Data Card stores continuous ECG waveforms and events on a Type II PCMCIA card SanDisk SDP3B 8MB ATA FlashDisk One 8MB card can store approximately 2 hours of continuous ECG waveforms and events Specifications Specifications General Dimensions 19 0 cm H x 37 6 cm W x 34 6 cm L 7 5 x 14 8 x 13 7 Weight Standard Configuration weighs 6 5 kg 14 3 Ibs including battery full roll of paper and external paddles Environmental Temperature 0 to 50 C operating 20 to 70 C storage e Thermal paper may darken above 55 C e Charging the battery at temperatures above 35 C may degrade battery life e Storing the battery for extended periods at temperatures above 40 C will reduce battery capacity and degrade battery life Humidity Up to 95 Relative Humidity e Printer may jam if paper is wet e Printer may be damaged if wet paper is allowed to dry while in con tact with the printhead elements Altitude e Operating up to 15 000 ft e Storage up
16. 5 9 Page 5 10 5 11 5 12 5 12 5 13 5 14 5 16 5 17 Page 5 18 Page 5 21 Replacement Parts M4735A Service Manual Electrical Assemblies Electrical Assemblies The following tables provide information about replacement electrical assem blies Control PCA The replacement Control PCA includes the Lithium backup battery the bat tery s cable tie wrap and the black plastic shield for the Data Card receptacle entrance Installation requires use of the Support Software Tool M4735 87890 Table 5 2 Replacement Control PCA Language Part Number American English M4735 68100 French M4735 68101 German M4735 68102 Dutch M4735 68103 Spanish M4735 68104 Italian M4735 68105 Swedish M4735 68106 Norwegian M4735 68108 Finnish M4735 68109 Portuguese M4735 68113 Russian M4735 68114 Polish M4735 68119 British English M4735 68160 Chinese M4735 68161 Australian English M4735 68170 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 5 7 Electrical Assemblies Other Replacement PCAs These PCAs come with specific parts as noted Table 5 3 Other Replacement PCAs Description Power PCA with Pacing Part Number M4735 68110 Notes Power PCA without Pacing M4735 68111 Keyscan PCA M4735 68120 SpO PCA M4735 68126
17. Cycle Power 3 13 Service Unit 3 13 T10 M3X6 screw 5 13 T15 M4X10 screw 5 13 Telephone assistance replacement parts 5 1 Response Centers 5 3 service 3 31 5 3 supplies and accessories 5 1 Test load 5 20 Test Matrix 2 4 Testing See Performance Verification Timebase test 2 23 Tool requirements 4 3 5 4 U Index Top case assembly 4 75 4 97 5 12 Trace ECG 3 18 Training required 7 16 Troubleshooting audio tones 3 16 3 27 battery and power modules 3 29 Data Card 3 30 defibrillation synchronized cardioversion 3 21 display 3 26 ECG monitoring 3 18 error codes 3 4 3 5 3 10 Extended Self Test failures 3 17 external failures 3 4 initial assessment 3 3 internal failures 3 5 keys 3 28 methodology 3 2 momentary messages 3 14 pacing 3 24 printer 3 25 repair philosophy 3 1 SpO2 monitoring 3 20 system messages 3 12 tables 3 6 telephone assistance 3 31 5 3 unresponsive unit 3 8 Unit Exchange Program 5 5 Upgrade 1 2 Index User Interface Test 2 4 Audio Test 2 26 Controls 2 25 Display Test 2 26 Printer Test 2 27 User maintenance 1 2 V Visual Inspection 2 4 2 15 W Waveform 150J 7 8 200J 7 11 Vi
18. Figure 4 21 Control PCA Screws Eject Button Lithium Battery Slide PCA to Rear Before Lifting Up 438 000 Removal and Replacement Internal Assemblies Top Case Replacement 1 Place the Control PCA in position Line up the holes in the Control PCA with the threaded standoffs on the shield plate Lower the PCA straight down into position CAUTION Do not drag the PCA over the surface of the shield plate to align it M4735A Service Manual Replace the screws TIP Screw installation is easier if all screws are started in their holes before any one of them is tightened Connect the Control PCA a Connect the speaker cable b Connect the printer cable c Connect the ribbon from the Parameter PCA d Connect the ribbon from the Keyscan PCA Replace the plastic shield if needed If the black plastic shield was damaged earlier replace it now with the one provided with the new Control PCA Remove any remaining pieces of the old shield peel the backing paper from the new shield and press firmly to adhere the shield into place After Repair After the repair is complete perform the following steps 1 Reassemble the case See Closing the Case on page 4 99 Restore the system configuration Use the Software Support Tool to restore the unit s serial number and to select whether SpO hardware is installed or not See The Software Sup port Tool on page 2 12 Restore the customer s co
19. Hands Free Defibrillation Patient Cable Length 7 ft 2 13 m ECG Cable Length 12 ft 3 7 m Common Mode Rejection Greater than 90 dB measured per AAMI standard for cardiac monitors EC 13 ECG Size 2 5 5 10 20 40 mm mV 7 3 Specifications 7 4 Frequency Response AC Line Filter 60 Hz 50Hz Pads ECG for Display Monitor 15 40 Hz or EMS 1 30 Hz Pads ECG for Printer Monitor 15 40 Hz or EMS 1 30 Hz Leads ECG for Display Monitor 15 40 Hz or EMS 1 30 Hz Leads ECG for Printer Diagnostic 05 150 Hz or EMS 1 30 Hz or Monitor 15 40 Hz Patient Isolation defibrillation proof ECG Type CF SpO Type CF Defib Type BF Display Size 115 mm x 86 mm Type EL Electroluminescent Resolution 320 x 240 pixels Sweep Speed 29 mm s nominal stationary trace sweeping erase bar Viewing Time 4 seconds Battery Type 2 Ah 12V rechargeable Sealed Lead Acid Dimensions 2 4 H x 0 94 W x 7 2 D 61 7 mm H x 23 9 mm W x 182 mm D Weight 1 4 Ib 0 65 kg Charge Time e Approximately 14 5 hours to 100 e Approximately 3 hours to 90 indicated by LED on front panel Capacity With a new fully charged battery at room temperature 259C e 100 minutes ECG monitoring or e 50 full energy discharges or e 75 minutes ECG monitoring while pacing Battery Indicators LOW BATTERY message appears on display when at least 10 minutes of monitoring time and 5 maximum e
20. Troubleshooting on page 3 1 and the following specific tables e Table 3 11 Operational Problems Printer on page 3 25 e Table 3 12 Operational Problems Display on page 3 26 e Table 3 13 Operational Problems Audio Tones Voice Prompts on page 3 27 e Table 3 14 Operational Problems Keys on page 3 28 To test the Controls keys 1 Access the Diagnostic Test menu See Diagnostic Mode on page 2 11 Start the Controls Test Select Controls Test and press ENTER The screen will display a map of the front panel keys Test the softkeys Press each of the numbered softkeys in turn See Figure 2 1 on page 2 11 for numbering of softkeys Each softkey number on the display should be highlighted each time that key is pressed Don t press Softkey 4 MAIN at this time This will return you to the Main diagnostic mode menu Test the ECG and Audio keys Test each of the ECG Size and Volume keys See Figure 2 1 on page 2 11 for location of these keys Each key should show a highlighted FH plus when the up arrow on the key is pressed and show a highlighted E minus when the down arrow is pressed Test the printer keys Test each of the printer control keys Strip Summary and Mark Each corresponding label on the display should be highlighted each time that key is pressed Test the pacing keys Test each of the Pacing keys The displayed labels for Pacer Start Stop and Mode should be
21. the wires so they point toward the center of the Power PCA as shown in Figure 4 41 NOTE The correct polarity is with the red wire near the red inductor and the white wire near the back corner of the Power PCA 4 84 Removal and Replacement M4735A Service Manual Internal Assemblies Bottom Case 3 Restore the capacitor to its final position a Pivot the capacitor around to the left b Guide the white wire through the slot in the foam base c Lower the foam base onto the Power PCA Figure 4 41 Disconnecting the Capacitor AC Power Module Foam Base Defibrillator Capacitor High Voltage Power PCA Spade Connector 2 Total Slot in Foam After Repair After this repair is complete perform the following steps 1 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 85 Internal Assemblies Bottom Case Power PCA The Power PCA is located in the bottom case Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2
22. 4 IF The screen is blank except for an error message such as Defib Failure Cycle Power THEN Proceed to Diagnosing Internal Failures on page 3 5 3 3 Diagnosing External Failures Diagnosing External Failures Many times a problem will be the result of external failures such as defective cables depleted batteries or improper operation Use the steps below to rule out these external failures before looking for an internal failure in the unit Capture the Configuration Data Store the unit s configuration data on a Data Card or print out the current con figuration if possible See Configuration Mode on page 2 10 Print the System Log Print out the System Log if possible and use any error codes to help isolate the problem See System Log on page 2 20 NOTE 3 4 The M4735A log of error codes only reports the last 10 errors If new errors are created at this stage they may overwrite the existing codes and valuable clues to the reported problem might be lost Therefore always attempt to print the System Log before proceeding Rule out external components and improper use Referring to Table 5 16 for Supplies and Accessories make sure the unit has e Anundamaged fully charged M3516A battery e Anew dry roll of Agilent 40457C D printer paper Printer paper may jam if paper is wet Also printer may be damaged if wet paper is allowed to dry while in contact with the printer elements e Cables and sens
23. 4 84 4 97 Internal Assemblies Bottom Case 5 Power PCA and shield see Power PCA on page 4 86 6 AC Power Module see AC Power Module on page 4 90 7 Battery 8 All screws New parts to be installed provided with bottom case The Replacement Bottom Case Assembly comes with the following new components which must be installed in the field e Battery cover e Large nut for Patient Connector New parts to be installed must be ordered separately In addition the following parts cannot be reused from the old case and must be ordered separately and installed into the new bottom case e Case Label Set These are available in all the supported languages See the Replacement Parts chapter 5 11 to select the correct language e Primary Label When replacing the bottom case the Primary Label containing the unit s serial number must also be replaced Be prepared to provide information identifying the unit when ordering the bottom case NOTE 4 98 To enable device tracking as mandated by US Federal law the Primary Label must be applied before placing the unit back into service After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verif
24. 6 Stop Pacer 3 15 testing 2 5 2 24 2 33 Pads applying 7 16 Attach Pads 3 14 defibrillation 5 19 No Pads 3 12 Pads Cable Off 3 12 Pads FE test 2 30 Pads Off 3 13 3 19 safety precautions 7 16 Paper 5 18 Patient Connector 4 94 5 12 5 23 Patient lead leakage 2 39 iii Index PCA Printed Circuit Assembly Battery 4 80 5 8 5 21 6 4 Power 4 86 5 8 5 21 6 3 SpO2 4 58 5 8 6 4 See also Control PCA See also Interface PCA PCI Patient Contact Impedance 2 32 Peak to Peak reading 2 30 Performance Verification Configuration Mode 2 10 Diagnostic Mode 2 11 Diagnostic tests 2 19 equipment 2 8 functional checks 2 16 mandatory testing 2 2 safety tests 2 30 Test Matrix 2 4 Visual Inspection 2 4 2 15 Power Module defibrillator test 2 6 2 35 discharging capacitors 4 24 Indicator Matrix 3 29 operational problems 3 29 repair philosophy 1 3 replacement parts 5 20 5 24 Power modules electromagnetic compatibility 7 19 Q Power PCA 6 3 removal and replacement 4 86 5 8 5 21 Precautions 7 16 electromagnetic compatibility 7 19 Preventive maintenance 1 2 Primary Label 4 98 Printer 6 4 cable 4 62 Check Printer 3 14 control keys 2 25 ECG functions 2 17 Event Summary 7 6 Extended Self Test 2 22 mandatory testing 2 3 operational problems 3 25 paper 5 18 removal and replacement 5 8 specifications 7 5 System Log 2 20 testing 2 27 QRS beeper 3 20 Radio frequency RF interference 7 19 RAM
25. A serious error has occurred Turn power off then on If message reap pears service unit See Troubleshooting on page 3 1 M4735A Service Manual 3 13 General Problems Momentary Messages Momentary messages are temporary and only appear on the display for a few seconds They are intended for the end user and appear in the User s Guide A subset of the available messages is duplicated here for the reference of the service person NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 4 Momentary messages Message Attach Leads Possible Cause The user attempted to begin pacing in Demand Mode without ECG leads attached to the patient Corrective Action Attach leads to patient Use Leads With paddles connected and selected as the ECG input the user attempted to acti vate Synchronized Cardioversion With no leads connected the user con nected paddles and selected them as the ECG input then connected the leads Use leads for ECG Use leads for ECG Attach Pads The multifunction defib electrode pads are not making proper contact with the patient 1 Check the pads are applied to the patient as directed on the package 2 Replace pads if the prompt continues Attach Paddles The user attempted to charge the defib in Manual Mode with no paddles connected Conn
26. Battery Capacity Test on suspect battery see page 2 40 Use only supported battery M3516A M5516A Diagnose further as follows In Diagnostic Mode start Battery Capacity Test see page 2 40 e Unsupported battery on dis play Stop test Replace 1 Bat tery PCA 2 Power PCA 3 Control PCA No message on display Stop test Replace 1 Power PCA 2 Control PCA M4735A Service Manual 3 23 Operational Problems Table 3 9 Operational Problems Defibrillation and Synchronized Cardioversion Message or Symptom Doesn t deliver correct energy into Defibrillator Analyzer or delivers no energy at all Should also get mes sage No shock delivered or Defib failure Possible Causes Control PCA failure Power PCA failure Suggested solution Replace Control PCA Replace Power PCA Doesn t measure its own delivered energy correctly Power PCA failure Control PCA failure Replace Power PCA Replace Control PCA Not synchronizing even though ECG waveform OK on display Control PCA failure Replace Control PCA Fails Defib Meas Test in Diagnostic Mode other then symptoms above Power PCA failure Control PCA failure Replace Power PCA Replace Control PCA Pacing The following table covers problems that might arise while performing exter nal pacing NOTE Before replacing any parts check to see if the cables and flex circ
27. Connect the 4 pin connector be sure it latches b Connectthe small 2 pin connector be sure it latches 5 Connect the Patient Connector to the Power PCA a Connect the 9 pin connector be sure it latches b Connect the 2 High Voltage spade connectors by pushing straight down with a needle nose pliers After Repair After this repair is complete perform the following steps 1 Connect and replace the defibrillator capacitor See Defibrillator Capacitor on page 4 84 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 89 Internal Assemblies Bottom Case AC Power Module The following sections describe how to remove and replace the AC Power Module Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Remove the screws a Orient the M47354 so the end of the bottom case is hanging off the work surface See Figure 4 45 b Remove the 2 T15 screws that secu
28. EELUEM un Wid H31wMit bel 6 5 M4735A Service Manual System Functional Descriptions System Functional Descriptions For all of the descriptions below refer to Figure 6 2 Signal and Data Flow Signal and Data Flow Below is a high level block diagram representing how signals and data flow to and from the PCAs Figure 6 2 Signal and Data Flow iib Power PCA Ko Ps Control PCA Parameter PCA Data amp Gone Daia Comici 30 pin ribbon JE 8D pin iban MH J4 H SPO PCA Pads tibii z 3 ECG Monitonn en J3 a Blacimdas ky ih d4 j Lands E Buda ECG 2 wind s Out Speaker Data amp Comal 220 pan nite cable VLA X Keyscan PCA Display ana s f Data S Gonia Interface MH 28 pin bon Jh Daia Printer E 1 E ie pia nba J nergy 5 uH B Select r Bnghz Cone 54 Seite JTz13 JT I pr neten Mae circuits K B ias Sails Main Keypanal Charge Shock fe ol Pacing Keypansl Theory of Operation M4735A Service Manual System Functional Descriptions ECG Monitoring Functions There are two separate ECG front ends one for signals coming in on the pad dles or pads cable and one for signals coming in on the 3 or 5 lead ECG cable ECG Paddles Pads The ECG signal picked up by the paddles or disposable defibrillation pads is carried by the cable to the pads paddles connector and then to the Power PCA There it is amplified filtered digitized and passed across a patient i
29. Flex Circuit Handling The flex circuits are delicate and can be damaged by improper handling e Do not bend sharply e Do not scrape the contact surface against other parts e Handle the flex with bent tip needle nose pliers whose jaws are cov ered with a soft material such as plastic tubing or tape Internal Connections Whenever troubleshooting indicates a particular PCA may be at fault it is always good practice to check all the connections to that PCA and retest before replacing the PCA Cable and Assembly Placement How the wires and cables are routed and dressed inside the chassis plays an important role in two areas in preventing long term wear problems and in reducing electromagnetic and radio frequency interference emitted by the defibrillator e When you disassemble any part of the defibrillator pay special atten tion to how cables and wires are routed e When you reassemble the defibrillator be sure to route and dress all cables and wires as they were originally e Return all components to their original position within the case Instrument Reassembly If you do not reassemble the instrument correctly the instrument may no longer be properly sealed This could result in water damage to the defibrilla tor Be sure to maintain the water resistant seal by Removal and Replacement WARNING M4735A Service Manual Servicing Notes Replacing all gaskets in their proper locations Correctly assembling all
30. Mode run P aa bbb the Pacing Test page 2 Example P 31 198 33 30 mA aa 30 mA 5 mA 200mA bbb 200mA 20 mA M4735A Service Manual 2 5 Test Matrix Table 2 1 Performance Verification and Safety Tests Test Group Name Test or Inspection to Perform Expected Test Results Data to Record X p pass or f fail Defibrillator Test AC Power DA if AC Power used in normal opera tion Using only AC power enter Diagnostic Mode and run the Defibrillator Test AC Power at 200J page 2 35 Measured by Defibrillator Analyzer Delivered energy aaa Displayed by M4735A Available Energy after Shock Msec to charge bbbbb Delivered energy ccc Impedance dd Defib errors e 200 30J 0 15000 msec Actual delivered energy aaa 7 42 to 57Q None 0 DA aaa bbbbb ccc dd Example DA 198 13000 195 48 Defibrillator Test Battery Power DB Using only battery power enter Diagnostic Mode and run the Defibrillator Test Battery Power at 200J page 2 36 Measured by Defibrillator Analyzer Delivered energy aaa Displayed by M4735A Available Energy after Shock Msec to charge bbbb Delivered energy ccc Impedance dd Defib errors e 200 30J 0 3000 msec Actual delivered energy aaa 7 42 to 57Q None 0 DB aaa bbbb ccc dd Example DB 198 2545
31. Off The SpO cable is not connected to the device Attach the SpO cable to the M4735A Sp02 Light Interf The level of ambient light is so high that the sensor cannot obtain an SpO read ing or the sensor or cable is damaged 1 Cover the sensor with an opaque mate rial 2 Check the sensor and cable for dam age try another sensor and cable Non Pulsatile The patient s pulse is absent or too weak to be detected 1 Check that the sensor is applied prop erly 2 Make sure the sensor site has a pulse 3 Relocate the sensor to a site with improved circulation 4 Try another sensor Sp02 Low Signal SpO signal is too low to give an accurate reading 1 Check the sensor is applied properly 2 Try another sensor type Sp02 Noisy Signal Excessive patient movement electrical interference or optical interference is present 1 Minimize patient movement or apply the sensor to a site with less movement 2 Secure the sensor cable loosely to the patient 3 Reduce sources of electrical or optical interference Sp02 Sensor Fail The SpO cable is not connected to the 1 Attach the cable to the M4735A device or the cable or sensor are broken 2 Replace cable and or sensor p02 Failure A failure has occurred in the SpO cir Turn power off then on If message reap cuitry pears service unit See Troubleshooting on page 3 1 System Failure Cycle Power
32. Open the case safely 3 Disconnect and remove the defibrillator capacitor See Defibrillator Capacitor on page 4 84 Removal 1 Disconnect the Patient Connector from the Power PCA a Disconnect the 9 pin connector press on the latch to release See Fig ure 4 42 on page 4 87 b Disconnect the 2 High Voltage spade connectors by pulling up with a needle nose pliers 2 Disconnect the Battery PCA from the Power PCA a Disconnect the large white 4 pin connector press on the latch to release This connector carries the battery leads 2 red 2 black wires b Disconnect the small 2 pin connector press on the latch to release 3 Disconnect the AC Power Module a Disconnect the 6 pin connector from the Power PCA press on the latch to release Note it only carries 3 wires b Disconnect the 4 pin connector from the Power PCA press on the latch to release 4 Disconnect the Control PCA ribbon cable 4 56 Disconnect the large ribbon cable from the Control PCA Its other end should already be disconnected from the Control PCA Removal and Replacement Internal Assemblies Bottom Case Figure 4 42 Disconnecting the Power PCA 9 Pin Connector to High Voltage High Voltage 6 Pin Connector to Patient Connector Spade Connectors to Spade Connectors to AC Power Module Patient Connector Defibrillator Capacitor 2 Total 2 Total Power PCA Large 4 Pin Connector to 4 Pin Connector 2 Pin Connector Battery PCA to AC Power Module
33. Pull the Battery Eject Catch up out of its slot in the case There will bea long spring the Battery Catch Spring inside the catch Note the orienta tion of the Catch in its slot Figure 4 8 Battery Eject Mechanism Case With battery cover removed Eject button Catch on Eject Button Battery Eject Catch 4140 Removal and Replacement External Assemblies Replacement 1 Install the Spring into the Catch Insert the new Battery Catch Spring into the hole in the end of the new Battery Eject Catch 2 Install the Battery Eject Catch Insert the new Battery Eject Catch into its open slot in the bottom case Orient it so the spring points toward the Data Card Door and the triangu lar plastic catch faces up toward you through the open slot 3 Install the Battery Eject Button a Insert the Battery Eject Button into its hole in the bottom case b Push the Eject Button all the way in to engage its catch and prevent it from falling back out Check to be sure the Eject Button and Eject Catch slide freely and operate correctly 4 Replace the battery cover See Battery Cover on page 4 10 After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 M4735A Service Manual 4 15 External Assemblies Data Card Door The following sections describe how to remove and replace the Data Card Door Removal 1 Open the door This
34. Replace Power PCA 2 Replace Control PCA 02000 Leads front end failure 1 Replace Parameter PCA 2 Replace Control PCA 04000 Pacer failure Replace Power PCA 08000 Processor error Replace Control PCA 10000 1FFFF System monitor failure Replace Control PCA 20000 2FFFF Front end failure 1 Replace Control PCA 2 Replace Parameter PCA 30000 3FFFF Pacer failure 1 Replace Power PCA 2 Replace Control PCA 40000 4FFFF Monitor processor failure 1 Replace Parameter PCA 2 Replace Control PCA 50000 5FFFF SpO problem 1 Replace SpO PCA 2 Replace Parameter PCA 3 Replace Control PCA 60000 6FFFF Advisory Failure Replace Control PCA 80000 8FFFF IRDA failure 1 Replace Parameter PCA 2 Replace Control PCA 90000 90002 Self Test failure RAM ROM or Gate Array Replace Control PCA 90003 Self Test failure Data Card circuits Replace Control PCA 90004 and 90005 Self Test failure Codec time base Replace Control PCA 90006 Self Test failure SpO 1 Replace SpO PCA 2 Replace Parameter PCA 3 Replace Control PCA 90007 and 90008 Self Test failure Pacer or Defib 1 Replace Power PCA 2 Replace Control PCA Troubleshooting General Problems Table 3 2 Error Codes Error Code Possible Causes Corrective Actions p
35. See Energy Select Switch on page 4 52 If the Bezel Assembly is being removed for access to other subassem blies skip this step 5 Remove the Display Assembly OPTIONAL If the Bezel Assembly is being replaced also remove the Display Assem bly See Display Assembly on page 4 54 If the Bezel Assembly is being removed for access to other subassem blies skip this step M4735A Service Manual 4 49 Internal Assemblies Top Case Replacement 1 Replace the Display Assembly See Display Assembly on page 4 54 2 Replace the Energy Select switch and knob See Energy Select Switch on page 4 52 3 Snap the Bezel Assembly onto the front of the case a Guide the Energy Select ribbon cable the Display ribbon cables and the Keypad flex circuits through their respective openings in the case b Guide each of the locking clips through its opening in the case c Press the Bezel Assembly into place Press firmly to compress the gasket on the case and allow the clips to latch Be sure all 6 locking clips engage their mating tabs 4 Replace the 2 threaded standoffs Press firmly to compress the gasket and allow the standoffs to engage the threads on the Bezel Assembly 4 50 Removal and Replacement Internal Assemblies Top Case After Repair After this repair is complete perform the following steps 1 M4735A Service Manual Replace and reconnect the Keyscan PCA See Keyscan PCA on page 4 42 Repl
36. Y YES N NO dorn care OR ORANGE AMBER OFF OFF N Normal OFF Y Normal OR Y Battery is charging G Y Battery 90 charged M4735A Service Manual 3 29 Operational Problems Data Card The following table covers problems that might arise with the Data Card NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 17 Operational Problems Data Card Symptom Data card is not recognized when plugged in Possible Cause Unit power is already on Card is only recognized during power up sequence Card is full or not a supported type Corrective Action Turn power off for 2 minutes then on again Use a new empty M3510A Data Card Data on the card corrupted The card was removed while the unit power on Only remove card after power is turned off Delete corrupted files using the CodeRunner Web Data Management System Fails Data Card Test in Diagnostic Mode Card is full or not a supported type Failure on Control PCA Peblank Use a new empty M3510A Data Card Replace Control PCA 3 30 Fis pace ttentionaly te Troubleshooting Calling for Service Calling for Service For telephone assistance call the Agilent Response Center nearest to you or visit our website at www agilent com healthcare United States of America
37. and holding key 3 SHOCK until the next time an R wave is detected e Second by simultaneously pressing and holding the SHOCK switches on both the Sternum and Apex paddles until the next time an R wave is detected When both events occur either type of key press and detection of an R wave the Control PCA directs the Power PCA to deliver the shock 6 10 Theory of Operation System Functional Descriptions Pacing Functions Pacing is initiated and controlled by pressing front panel keys These key presses are transferred from the keys to the Keyscan PCA via a flex circuit The key presses are detected and processed by the Keyscan PCA and then passed to the Control PCA via a large ribbon cable The Control PCA directs the Power PCA to deliver the pacing pulses at the rate and output current selected by the user The pacing pulses are delivered via the pads cable to the defibrillation pads The pacing current delivered is reported back to the Control PCA which sends the info to the display and activates any printouts or screen messages as needed Audio Functions The M4735A has 2 types of audio output tones and voice prompts Both are generated and controlled by the Control PCA which also amplifies the signals and passes them directly to the speaker via a dedicated connector and wire pair Display Functions All display functions are handled by the Control PCA Display formats graphics waveforms numeric values and messages
38. annotate the event with one of the following labels Epinephrine Adrenaline Atropine Lidocaine and Other Auto Printing The printer can be configured to automatically print on Mark Charge Shock and Alarm Delayed Printing The printer can be configured to run real time or with a six second delay Reports The following can be printed Event Summary Configuration Extended Self Test System Log Battery Capacity Test Shift System Check Speed 25 mm s with an accuracy of 5 Amplitude Accuracy 10 or 50 uV whichever is greater Paper Size 50 mm by 30 m 100 ft M4735A Service Manual 7 5 Specifications 7 6 Noninvasive Pacing Waveform Monophasic Truncated Exponential Current Pulse Amplitude 10 mA to 200 mA 5 mA resolution accuracy 10 mA 50 mA 5 mA 50 mA 200 mA 10 Pulse Width 20 ms with accuracy 0 5 ms Rate 30 ppm to 180 ppm 10 ppm increments accuracy 1 5 Modes Demand or Fixed Rate Refractory Period 80 ppm 340 msec 10 gt 80 ppm 240 msec 10 SpO Pulse Oximetry Accuracy with M1191A sensor 1 standard deviation 70 to 100 2 5 M1192A sensor 1 standard deviation 70 to 100 2 5 M1194A sensor 1 standard deviation 70 to 100 4 0 NELLCOR sensors 1 standard deviation 80 to 100 3 0 Resolution 1 SpO Alarm Limits Three preset low alarm limits 90 85 and 80 INOP Alerts Triggered by disconnected sensor noisy signal light interfer
39. battery is an Agilent approved battery or not It does this with a microswitch on the battery PCA Theory of Operation M4735A Service Manual System Functional Descriptions which detects if a dimpled recess is present in the end face of the battery Agilent M3516A batteries have this dimple while other batteries even those that are otherwise mechanically compatible do not This information is passed via a separate pair of wires to the Power PCA and from there to the Control PCA During defibrillation the Control PCA will direct the Power PCA to charge the defibrillator capacitor more slowly if there is a battery other than an M3516A present This is done to reduce current drain on the battery and thus avoid tripping the thermal cutout present on many other batteries Agilent M3516A batteries do not have this cutout so their current delivery can be greater allowing the defibrillator to charge more quickly Charging Monitoring the battery and controlling the charging process are both handled by the AC Power Module The Power PCA receives status information via connections both directly to the AC Power Module and to the battery The Power PCA then sends this status information to the Control PCA via a large ribbon cable The Control PCA processes this information and sends signals to control the AC Power and Batt Charge LED s via the Keyscan PCA When the unit is powered on while AC is connected the Power PCA instructs the AC Power M
40. cable connection pads are not properly connected to the M4735A No Paddles In Manual Mode no therapy cable is con Connect the cable nected to the instrument Pads Cable Off The pads cable is not connected to the defibrillator Failure on Power PCA Check that the pads cable connector is locked in place Replace Power PCA 3 12 Troubleshooting General Problems Message Pads Off Description The pads are not making proper contact with the patient Failure on Power PCA Corrective Action Make sure the pads are properly applied to the patient Replace Power PCA Defib Failure Cycle Power An error has occurred in the defibrillator subsystem Turn power off then on If message reap pears service the unit See Troubleshoot ing on page 3 1 and Table 3 9 on page 3 17 50J Maximum When using internal paddles the maxi mum energy delivered is limited to 50J Select a lower energy Pacer Failure The pacing system is not functioning Service the unit See Troubleshooting on page 3 1 and Table 3 10 on page 3 24 Pacer Output Low The pacer is delivering less current to the patient than specified in the output current setting Check the pads are applied properly patient impedance is high System Failure Ser vice Unit A serious malfunction has occurred Service the unit See Troubleshooting on page 3 1 Sp02 Cable
41. can either generate or receive electromagnetic interference Testing for electromagnetic compatibility EMC with and without the appro priate accessories has been performed according to the international standard for EMC for medical devices IEC 60601 1 2 This IEC standard has been adopted in Europe as the European Norm EN 60601 1 2 The EMC standards describe tests for both emitted and received interference Emission tests deal with interference generated by the device being tested WARNING Radio frequency RF interference from nearby transmitting devices may degrade performance of the M4735A Heartstream XL Defibrillator Monitor Electromagnetic compatibility with surrounding devices should be assessed prior to using the defibrillator Reducing Electromagnetic Interference The M4735A Heartstream XL Defibrillator Monitor and associated accesso ries are susceptible to interference from other RF energy sources and continu ous repetitive power line bursts Examples of other sources of RF interference are medical devices cellular products information technology equipment and radio television transmission Should interference be encoun tered as demonstrated by artifact on the ECG or dramatic variations in SpO2 values attempt to locate the source Assess e Is the interference intermittent or constant e Does the interference occur only in certain locations e Does the interference occur only when in close proximity to certain medic
42. cm Switchless Internal Paddles M4741A 7 5 cm Switched Internal Paddles M4742A 6 5 cm Switched Internal Paddles M4743A 4 5 cm Switched Internal Paddles M4744A 2 8 cm Switched Internal Paddles M4740A Internal Paddles Adapter Cable Replacement Parts Supplies amp Accessories Part Number Description Defibrillation Pads M3501A Adult multi function defib electrodes AAMI M3502A Adult multi function defib electrodes IEC M3503A Pediatric multi function defib electrodes IEC M3504A Pediatric multi function defib electrodes AAMI DP2 Defibrillation pads 2 Pack Heartstream DP6 Defibrillation pads 6 Pack Heartstream Pads Cables M3507A Agilent Pads Adapter Cable M3508A Heartstream Pads Connector Cable 05 10200 Heartstream Pads Adapter for DP2 and DP6 Pads use with M3507A ECG Monitoring Electrodes M2202A Case of monitoring electrodes ECG Monitoring Cables and Leadsets M1500A 3 lead ECG Trunk Cable AAMI M1605A 3 lead ECG Leadset with Snaps AAMI M1510A 3 lead ECG Trunk Cable IEC M1615A 3 lead ECG Leadset with Snaps IEC M1520A 5 lead ECG Trunk Cable AAMI M1625A 5 lead ECG Leadset with Snaps AAMI M1530A 5 lead ECG Trunk Cable IEC M1635A 5 lead ECG Leadset with Snaps IEC SpO Cable Sensors M1191A Adult Finger Glove Reusable SpO Sensor M1192A Pediatric Small Adult Finger Glove
43. displayed by the M4735A The results displayed by the M4735A should be as follows Available Energy Not recorded failure if gt 0 ms to Charge lt 3000 Record as bbbb Delivered Energy Actual delivered energy aaa 7 Record as ccc Impedance 42 to 57 ohms Record as dd Peak Current Ignore Derived from same measurements as delivered energy and impedance Defib Errors Not recorded failure if any reported Performance Verification and Safety Tests Performance Verification NOTE If the ms to Charge measurement is too high unit takes too long to charge verify that the battery is fully charged If it is the battery may simply be old The 3000 ms specification is defined for a new freshly charged M3516A bat tery Replace the battery with one that is new and fully charged and repeat the test M4735A Service Manual 2 37 Performance Verification 2 38 Defibrillator Disarm Test These instructions describe how to test the disarm function If all results are as described the unit passes the test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin trou bleshooting and repairing the unit as needed See Troubleshooting on page 3 1 Set up the test a Turn the defibrillator off Insert the battery and connect the AC Power cord b Connect the defibrillator analyzer to the pads cable Set the analyzer to measure delivered energy If needed reset the
44. e Specifications for the M4735A e Symbol Definitions for symbols appearing on the M4735A e Safety related information and e Electromagnetic compatibility information Specifications Defibrillator Waveform Biphasic Truncated Exponential Waveform parameters adjusted as a function of patient impedance For details of waveforms delivered see the Waveforms section of this chap ter Shock Delivery Via multifunction defib electrode pads or paddles Delivered Energy Accuracy See Table 7 1 below 7 1 6 29 00 Specifications Table 7 1 Delivered Energy vs Load Impedance Delivered Energy J Selected Energy Load Impedance ohms Accuracy Y 25 50 100 125 150 5 4 7 5 5 2 5 4 5 2 t2J 10 9 3 10 10 4 10 7 10 4 t2J 25 23 4 25 26 2 26 9 26 2 t4J 50 46 7 50 52 3 53 5 52 1 15 70 65 4 70 73 1 75 0 72 9 15 100 93 5 100 104 7 107 2 104 4 15 150 140 3 150 156 8 161 0 156 5 15 200 187 200 209 3 214 6 208 6 15 Charge Time Less than 3 seconds to 200 Joules with a new fully charged M3516A SLA battery pack at 25 C Less than 15 seconds to 200 Joules when powered by AC with no battery installed Patient Impedance Range 25 to 180 Ohm Manual Mode Manual Output Energy Delivered 2 3 5 7 10 20 30 50 70 100 150 200 Joules Controls Manual AED On Energy Select knob Charge Disarm Shock ECG Lead Select SpO On Off SpO Alarms HR Alarms Sync On O
45. highlighted each time that key is pressed The dis 2 25 Performance Verification 2 26 played labels for Rate and Output should show a highlighted plus when the up arrow on the key is pressed and show a highlighted E minus when the down arrow is pressed End the test Press Softkey 4 MAIN to return to the Main diagnostic mode menu To test the display 1 Run the Display Test Select Display Test and press ENTER The display should turn completely light then completely dark then a light vertical bar should scroll across the screen from left to right Test the LEDs The display will show a TEST LEDs softkey label Press this softkey and verify that the indicators in the Main and Pacing keypads each light in turn The AC Power and Batt Charge LEDs will not light as part of this test End the test Press Softkey 4 MAIN to return to the Main diagnostic mode menu To test the audio output 1 2 Start the Audio Test Select Audio Test and press ENTER The screen will display the Audio Test menu Select and run the desired test a Pressthe A and W softkeys to move up or down the list to select the desired test Then press ENTER to begin that test Check the Shutdown Warning and the Voice Prompt the other responses are given for reference The results should be as described below Press CANCEL to end that test and return to the main audio test menu e Message Alert A
46. how to remove and replace assemblies that are external to the sealed case These assemblies include Assembly Page User replaceable Parts and Accesso 4 5 ries Printer Assembly 4 6 Battery Cover 4 10 Main Fuse 4 14 Battery Eject Assembly 4 14 Data Card Door 4 16 Energy Select Knob 4 17 Paddle Holders 4 18 Labels 4 20 Label Descriptions 4 20 Removing and Replacing Labels 4 22 CAUTION 44 Be sure to work in a static safe environment The work surface and area sur rounding it must be static free Use a static control wrist band in conjunction with an antistatic pad which is grounded per the manufacturer s instructions Removal and Replacement External Assemblies User replaceable Parts and Accessories The User s Guide gives detailed instructions on replacing the following e Patient cables amp sensors e Battery e Printer paper User Maintenance The User s Guide gives detailed instructions on maintaining and cleaning the M4735A including e Operational Checks e Battery Maintenance e Cleaning Instructions For the convenience of the service person instructions on cleaning the printer printhead are duplicated here Instructions on running the Battery Capacity Test are duplicated on page 2 40 Cleaning the Printer Printhead If the traces or characters in the printout are faint or vary in density dark ness clean the printhead to remove any buildup of paper residue 1 Open the printer and remove
47. is installed If all results are as described the unit passes the test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin troubleshooting and repairing the unit as needed See Troubleshooting on page 3 1 and Table 3 10 Operational Problems Pacing on page 3 24 1 Set up the test a Connect the defibrillator to the Pacer tester b From the Diagnostic Menu select Pacer Test and press ENTER The display should look similar to Figure 2 6 Figure 2 6 Pacer Test Display PACER TEST Pacer Status Selected Rate Selected Output Delivered mA 2 Begin Pacing a Press i mA 2 33 Performance Verification 3 Check the default output a The Pacer should be delivering a current of 30mA 5mA Record the delivered current indicated by the Pacer tester as aa b The display on the M4735A should read the delivered current as mea sured by the Pacer tester aa 5 mA 4 Test the maximum output 4 button increase the rate to 180 bpm 4 button increase the output to 200 mA c The Pacer should be delivering a current of 200mA 20mA Record the delivered current indicated by the Pacer tester as bbb d The display on the M4735A should read the delivered current as mea sured by the Pacer tester bb 20 mA 5 End the test Turn off Pacing by pressing the C 2 34 Performance Verification and Safety Tests Performance Verification
48. nemen ene ener enne enn 5 12 Connector Assemblies eene eet aea pa nennen nete tene nnne steer K Enara 5 12 Individual Mechanical Parts 0 ccccsccccccccecsesessecececececeesessssecececeesesensnaeseeeeeceesensttsaeees 5 13 l m Y 5 14 Instr ction Label Sets ca ect eei te tote rei hte Fee Pee geek ee aee ase de 5 14 Case Label Sets reden niei i p iin 5 16 anoSEo Jg ge RR m 5 17 Supplies A DOOSSOEIBS eei qu ERR UR INQUAM ANM RUN quies ue M ISDN MEE 5 18 Key epu ncn RTT CE r ia 5 21 Theory of Operation OVC VIEW A eeiam HII M EE 6 1 PCA DESSEIDIUMS moorei sirita sinine ta eiin estrena ce etse uideantur purs pesi 6 2 CONHOL PCA E E E E EA 6 2 Power PCA nne D 6 3 Parameter PCA c eec cete a lec eer ebat EE EENE 6 3 Keyscan i c 6 3 SEEN SU Mor x ene reer 6 4 liia jus um 6 4 Battery senise ieii ea M 6 4 AC PowerModnule eiecti tee eana e ee ote el et dees pee dva cue E OEE uet NE c 6 4 Printet uil ee Ideen ina i 6 4 viii Contents Syst m Level Interconnections vei eate e RH aU ERR Re ed CoU d Hd ol Eu 6 5 System Functional Descriptions isse heit trot vio FORET P URN NUES A REA RES URREN ERN EE EHEUER 6 6 viru and Data FI W Ae TEN 6 6 ECG Momtorbig Functions sasssiessieniie eiii ii a eae 6 7 Patient impedance
49. of the sensor and its connections and alerting the user to measurement problems Theory of Operation System Functional Descriptions Defibrillation Functions The following sections describe the defibrillation functions Charging There are 3 basic events that can initiate a charging cycle e In AED Mode when the analysis algorithm determines a shock is needed and sends a signal to another section of the Control PCA e In Manual Mode with either pads or paddles when front panel key 2 CHARGE is pressed the keypress is transferred from the key to the Keyscan PCA via a flex circuit The Keyscan PCA transfers the key press to the Control PCA via a large ribbon cable The keypress is then detected and processed by the Control PCA e Also in Manual Mode when the Apex paddle CHARGE key is pressed the keypress is transferred from the key to the Power PCA via the paddles cable The Power PCA transfers the keypress to the Control PCA via a large ribbon cable The keypress is then detected and pro cessed by the Control PCA In all cases the charging cycle is initiated and controlled by the Control PCA It directs the Power PCA to begin charging the charge capacitor and it moni tors the voltage on the capacitor as reported back by the Power PCA When the Control PCA detects that the selected energy voltage level has been reached it directs the Power PCA to stop charging The Control PCA then continues to monitor the voltage on t
50. page 5 21 Other Labels These labels are also available See Figure 4 12 on page 4 22 for correct placement of these labels Description Speaker Label Set Part Number M4735 69555 Notes Branding Label Set M4735 69556 M4735A Service Manual Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Supplies amp Accessories 5 18 Supplies amp Accessories Approved supplies and accessories for the M4735A are listed in Table 5 16 To order accessories and supplies e Visit our Medical Supplies website at www healthcare agilent com mpgsupplies e Inthe US call 800 225 0230 e Outside the US contact your local Agilent Technologies Sales Office or your authorized Agilent Technologies Dealer or Distributor Table 5 16 Supplies and Accessories Part Number Description Paper 40457C 1 box 10 rolls of 50 mm strip printer paper 40457D 1 case 80 rolls of 50 mm strip printer paper External Defibrillation Paddles M4745A External Sterilizable Paddles includes M1789 below M4746A External Paddles with PCI includes M1789A below M1789A Replacement Adult Paddle Adapter slip on Internal Defibrillation Paddles M1741A 7 5 cm Switchless Internal Paddles M1742A 6 5 cm Switchless Internal Paddles M1743A 4 5 cm Switchless Internal Paddles M1744A 2 8
51. parts that mate with gaskets making sure the gaskets are not wrinkled or pinched Replacing all screws Making sure that screws are not cross threaded and that they are tightened firmly Tool Requirements The following tools are needed to perform the procedures given Torx T10 and T15 drivers or Torx driver kit Agilent part number 5181 1933 T15 driver shaft should be at least 2 25 long and less than 5 16 in diameter to reach down to recessed case screws Slip joint pliers or adjustable open end wrench Small straight bladed screwdriver Straight tip needle nose pliers or tweezers Bent tip needle nose pliers whose jaws are covered with a soft mate rial such as plastic tubing or tape Fine nose wire cutters Utility knife High voltage discharge tool for discharging the defibrillator capacitor Agilent part number M2475 69572 Clip leads at least 2 each approx 10 18 Software Support Tool M4735 87890 Disposal Disposing of the M4735A Prior to disposing of the M4735A remove the battery Then dispose of the device in accordance with local standards Disposal of the device with the battery inserted presents a potential shock hazard Disposing of the SLA Battery The M3516A battery utilizes Sealed Lead Acid SLA technology Dispose of the battery or recycle it according to local regulations for lead containing products 4 3 External Assemblies External Assemblies This section describes
52. patient contact as indicated on the LED bar graph on the Sternum paddle The unit only displays a numeric value in Diagnostic Mode as part of the ECG test 6 7 System Functional Descriptions 6 6 During the Shock The M4735A also makes a resistance measurement during shock delivery This resistance is derived from measurements of voltage and current and is reported on the printed event summary The unit uses this value to determine whether to abort the shock or to allow it to complete Since one is a small signal AC measurement of impedance and the other is a high voltage high current measurement of resistance it is normal and expected for them to produce slightly different numerical results SpO gt Monitoring Functions The SpO signal from the sensor is carried by the external SpO cable to the SpO connector and then to the SpO PCA There it is amplified filtered and digitized before being passed to the Parameter PCA via a flex circuit Power for the SpO PCA and sensor is provided by the Parameter PCA via this same flex circuit The Parameter PCA provides on off logic patient iso lation and the power supply for SpO It then sends the data to the Control PCA via a large ribbon cable The Control PCA is then responsible for e Formatting and presenting the O saturation level pulse rate and pleth bar to the display e Counting pulse rate generating O saturation level alarms e Reporting on the status
53. proper operation of the M4735A following repair The level of testing required corresponds to the type of repair performed and is divided into 3 cat egories External No Trouble Found Printer Replacement and Internal Repairs Each of these categories is described below External Repairs No Trouble Found External Repairs are those involving the repair or replacement of one or more of the items below No Trouble Found applies when no malfunction can be found or when the problem appears to be due to improper use In either situation the key point is that the case has not been opened e External paddles e Internal paddles and or adapter cable e Paddle holders e Pads adapter cable e ECG cable e SpO cable or sensor e Battery e Labels e AC Power cord e Consumables ECG monitoring electrodes multifunction defibrilla tion pads printer paper e Main fuse on Battery PCA e Data Card Door Assembly e Battery Eject Assembly The following testing is required after an External Repair or when the out come of the service is No Trouble Found when the case has not been opened e Perform the Visual Inspection page 2 15 e Run the Extended Self Test page 2 22 e Print and Verify the System Log page 2 20 Performance Verification and Safety Tests Mandatory Testing Printer If the printer was replaced and the case was not opened the following tests are required e Perform the Visual Inspection page 2 15 e Run
54. remove and replace the Bottom Case Assembly Description The Bottom Case Assembly consists of the following components all preas sembled into the case at the factory e Data Card Door e Battery Eject Latch mechanism e Case gasket e Plug and O ring for the hole in the front of the case e Rubber feet on the bottom Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 e Data Card Door gasket Removal and replacement The Bottom Case replacement involves e Several existing parts which need to be moved from the old case to the new e Several new parts which must be installed and e some come with the bottom case e some must be ordered separately Parts to be moved from old bottom case to new The following subassemblies must be removed from the old bottom case and installed into the new one Follow the Removal and Replacement instructions in this chapter for each subassembly Remove them in the order shown and replace them in reverse order 1 Battery PCA spring cable see Battery PCA on page 4 80 2 Battery eject spring see Battery PCA on page 4 80 3 Patient Connector cables hardware see Patient Connector on page 4 94 4 Defibrillator capacitor see Defibrillator Capacitor on page
55. repeating series of 3 short tones followed by a pause e Heart Rate Alarm 1 sustained tone of moderately high pitch e Charge Done Tone sustained tone of lower pitch than the Heart Rate Alarm e Auto Disarm Warning A repeating series of 1 short tone and a pause Performance Verification and Safety Tests Performance Verification e Shutdown Warning A repeating series of tones of alternating high low pitch e Voice Prompt Voice should be clear and understandable 3 End the test Press Softkey 4 MAIN to return to the Main diagnostic mode menu To test the printer 1 Start the Printer Test a Select Printer Test and press ENTER 2 Check the print quality a Verify that the test patterns on the strip are as indicated in Figure 2 4 b Check for white lines printhead elements stuck off or black lines printhead elements stuck on c Checkarea A for stray marks or lines d The area of Figure 2 4 labeled C contains printouts of all characters and symbols Verify that they are readable 3 Stop the printout Press CANCEL to end the test and return to the main Diagnostic Test menu 4 Verify the print speed Measure between the long tick marks B in Figure 2 4 to verify paper speed Distance should be 25mm 5 1 25 mm 5 Check the printer status detection a Open the printer door and press the Strip key The unit should sound a series of 3 tones indicating a printer proble
56. the Extended Self Test page 2 22 e Run the Printer Test page 2 27 e Print and Verify the System Log page 2 20 Internal Repairs If the case was opened regardless of what the repair involved all of the Per formance Verification Tests must be performed beginning with Visual Inspection on page 2 15 M4735A Service Manual 2 3 Test Matrix Test Matrix The matrix in Table 2 1 summarizes performance verification tests and inspections for the M4735A including test name test or inspection to per form expected test results and data to record Table 2 1 Performance Verification and Safety Tests Test Group Name Test or Inspection to Expected Test Results Data to Record Perform X p pass or f fail Visual Inspection Inspect unit accessories No unusual damage no Vx V cables etc as described corrosion x p Example V p on page 2 15 Functional In normal Operating Mode All functions respond as Fx Checks F perform the following func expected Example F p tional checks ECG page 2 16 Waveform clear on display HR correct on display HR alarm works e Shock Advisory page 2 Shock Advised only when 17 appropriate Synchronized Cardiover e Shock delivered with cor sion page 2 18 rect timing e SpO gt page 2 18 9596 100 Extended Self In Diagnostic Mode run Pass reported on all tests Xx Test X the Extended Self Test applicable to the device co
57. the paper a Slide the printer door to the right until the paper roller pops up b Pullup on the plastic tab to remove the roll of paper 2 Clean the printhead Clean the printhead surface above the brush with a cotton swab dipped in isopropyl alcohol Take care to not leave cotton fibers behind 3 Replace the paper 4 Close the printer door M4735A Service Manual 4 5 External Assemblies 4 6 Printer Assembly The following steps describe how to remove and replace the printer assembly Preparation 1 Discharge the power supply capacitors a Disconnect the AC power and remove the battery b Discharge the power supply capacitors by turning the power on You will hear a click from the speaker 2 Open the printer and remove the paper a Open the printer by moving the sliding door in the direction of the arrow and lifting up the platen and roller b Pullup on the plastic tab and lift the paper out of the printer Removal 1 Loosen the 2 screws under the platen Loosen the 2 T10 screws now visible on the top and bottom edges of the printer assembly at the left end See See Figure 4 1 on page 4 7 2 Remove the label and loosen the other 2 screws a Using a utility knife pick up one corner of the label b Peelthe label up by pulling slowly and evenly on the loosened corner c Loosen the 2 T10 screws under the label Removal and Replacement External Assemblies Figure 4 1 Removing the Printer L
58. to 15 000 ft Shock Agilent Technologies Corp Section 760 End Use Class B1 Trans portation Type 1 Vibration Agilent Technologies Corp Section 759 Class B1 Vibration Water Resistance Meets IEC 601 2 4 Safety Meets IEC 60601 1 EMC Meets EN 60601 1 2 Other Considerations Equipment not suitable for use in the presence of a flammable anesthetic mixture with air oxygen or nitrous oxide Mode of Operation Continuous AC Line Powered 100 240 VAC 50 60 Hz 3A Class 1 Battery Powered 12 V Rechargeable SLA M4735A Service Manual 7 7 Waveforms 150J Waveforms 150J 150J 25 ohms p running auaiting trigger VERTICAL remote talk NOTE Noise appearing on the following waveforms is an artifact of the measurement 10 0 mv div position 17 mm BH lim LF rej 2 0000 ms 5 0000 ms 16 0000 ms 2 00 ms div realtime 4 10 0 m preset 17 0000 mV more probe This image displays the defibrillator current waveform for a 150J discharge into 25ohms The current probe is set to 10A division 10A 10mV The peak current is about 58A 150J 50 ohms p running auaiting trigger VERTICAL remote talk 10 0 mv div position 10 0000 mv ERE BH lim LF rej 2 0000 ms 8 0000 ms 18 0000 ms 2 00 ms div realtime 4 10 0 m preset 10 0000 mV more probe This image displays the defibrillator current waveform for a 150J discharge into b ohms The current probe is set to 10
59. to ensure a correct seal with the new switches and overlay b Clean surfaces thoroughly with isopropyl alcohol an alcohol wipe is fine Allow to dry completely 2 Replace the membrane switches a Feed the 2 flex circuits down through the slot in the case as shown in Figure 4 37 on page 4 73 b Peelthe backing material off the new switches Handle very carefully and touch the adhesive as little as possible c Starting with the top edge align the switches very carefully in their recess in the case and roll them down slowly into place Be careful not to kink the flex circuit tails as you slide them into their slot under the switches d Press firmly all over especially the edges to adhere the new switches into place and seal the case opening 3 Replace the Overlay a Clean the surfaces of the case and membrane switches NOT the rub ber overlay thoroughly with isopropyl alcohol an alcohol wipe is fine Allow to dry completely b Peelthe backing material off the Rubber Overlay Handle carefully and touch the adhesive as little as possible c Starting with the top edge align the Overlay exactly and roll it down slowly into place See Figure 4 38 on page 4 73 d Press firmly all over especially the edges to adhere the new Overlay into place 4 72 Removal and Replacement Internal Assemblies Top Case Figure 4 37 Installing the Membrane Switches Membrane Flex Circuit Slot in Case Switches Tails
60. 200 50 Defibrillator Dis arm Test D Enter Diagnostic Mode and run the Defibrillator Disarm Test page 2 38 All readings as expected X p D x Example D p 2 6 Performance Verification and Safety Tests Table 2 1 Performance Verification and Safety Tests Test Matrix Test Group Name Test or Inspection to Perform Expected Test Results Data to Record X p pass or f fail Safety Test S Test both leads and pads and indicate test results as follows External Leads t C External Pads t B Earth Leakage Earth Leakage Normal Condition aaa Earth Leakage Single Fault bbbb Patient Lead Leakage e Source Normal Condition ccc Source Single Fault Condition ddd With Mains on applied part Single Fault condition eeee Auxiliary Normal Condition fff Auxiliary Single Fault Condition 999 Note All leakage current tests include both Normal and Reverse Polarity Condi tions Report worst case values 500 uA 300 uA UL 1000 uA CF BF Applied Parts 10 uA 100 uA 50 uA 500 uA IA 50 uA 5000 uA lA lt 10 uA 100 uA 50 uA 500 uA S aaa bbbb t ccc ddd eeee fif ggg t ccc ddd eeee fff ggg Example S 125 150 C 10 40 40 10 40 B 90 150 2500 90 250 V x F x X x U x E aaaa bbbb cc dd ee ffff x P aa bbb DA aaa bbbbb ccc dd DB aaa bbbb ccc dd D x S aaa bbbb t ccc ddd eee
61. 4 19 External Assemblies 4 20 Labels The labels used on the M4735A are divided into 4 groups the Instruction Label Set the Case Label Set the Branding Label Set and the Speaker Label Each set of labels is one sheet containing all the labels in that set The labels are adhesive backed and replacing a label consists of peeling up the old cleaning the surface and sticking down the new See Removing and Replacing Labels on page 4 22 Label Descriptions The following sections describe each of the label sets in more detail Instruction Label Set The Instruction Label Set includes one label the label above the printer giv ing a brief overview of device operation This label comes in 2 versions for units with and without the Pacing option Each of these versions is available in all the supported languages see Tables 5 11 and 5 12 for part numbers See Figure 4 10 for locations of these labels Case Label Set The Case Label Set includes the following labels e ECG SpO Connector label includes Warnings and Notices Data Card Eject label Patient Connector label Blank label under hole plug next to Data Card Charge Battery label on bottom of case Printer label arrow on printer sliding door The Case Label Set comes in 2 versions for units with and without the SpO monitoring option Each of these versions is available in all the supported languages see Tables 5 13 and 5 14 for part numbers See Fig
62. 60 Removal and Replacement Internal Assemblies Top Case Figure 4 31 Removing the ECG Connector ECG Connector Metal Clip Case Post Cable to Parameter PCA SpO PCA Parameter PCA After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 61 Internal Assemblies Top Case SpO Connector The SpO Connector is located at the back of the top case next to the ECG Connector CAUTION See cautions regarding handling and connection of flex circuits on page 4 1 Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after repair 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the SpO Connector a Note the orientation and placement of the flex circuit between the SpO connector and the SpO PCA Disconnect it at the SpO PCA There is no latch just pull it straight out b Leave the flex circuit from the SpO PCA to the Parameter PCA con nected 2 Remove the SpO Con
63. 93 Internal Assemblies Bottom Case 4 94 Patient Connector The following sections describe how to remove and replace the Patient Con nector The Patient Connector is where the paddles or the pads cable connect to the M4735A Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the Patient Connector from the Power PCA a Disconnect the 9 pin connector press on the latch to release See Fig ure 4 42 on page 4 87 b Disconnect the 2 High Voltage spade connectors by pulling up with a needle nose pliers Note they are different sizes 2 Remove the Patient Connector a Unscrew the large nut on the back of the connector using a wrench or pliers b Pull the connector and its wires and O ring out of the case TIP Turn the 9 pin connector sideways to guide it out through the nut and through the hole in the case c Leave the metal plate in place on the inside of the hole Removal and Replacement Internal Assemblies Bottom Case Figure 4 47 Removing the Patient Connector 9 Pin Connector High Voltage to Power PCA Spade Connector to Power PCA 2 Total Metal Plate Case Wall Patient O Ring Connector Replacement 1 Replace the Patient Connector a Slide the wires of
64. A Reconnect cable properly See Servicing Notes on page 4 1 Replace Patient Connector its internal cable Replace Power PCA Trace distorted Failure in ECG front end Failure in signal processing circuits Pads Replace Power PCA Leads Replace Parameter PCA Replace Control PCA One or more ECG controls don t respond e g select lead or ECG size Failure in keypress detection pro cessing Failure in keys connections 1 Replace Control PCA 2 Replace Parameter PCA Replace Top Case Assembly Poor Leads ECG signal quality The monitoring electrodes are not making proper contact with the patient The monitoring electrodes are out dated or dried out Radio frequency interference RFI is causing artifact Check that the monitoring elec trodes are properly applied If nec essary prepare the patient s skin and apply new electrodes Check the date code on the elec trodes Do not open the electrode package until immediately prior to use Relocate or turn off equipment that may be causing RFI M4735A Service Manual 3 19 Operational Problems Table 3 7 Operational Problems ECG Monitoring Pads or Leads Symptom Poor Paddles Pads ECG signal quality Possible Cause The paddles or multifunction pads are not making proper contact with the patient The multifunction pads are outdated or dried out Radio frequency interference R
65. A division 10A 10mV The peak current is about 33A 7 8 Specifications Waveforms 150J continued Waveforms 150J continued 150J 75 ohms m running auaiting trigger VERTICAL remote talk cup cpm MCCC T PT BH lim LF rej 2 0000 ms 5 0000 ms 18 0000 ms 2 00 ms div realtime 4 10 0 mv preset 10 0000 mV MESA probe This image displays the defibrillator current waveform for a 150J discharge into 75ohms The current probe is set to 10A division 10A 10mV The peak current is about 23A 150J 100 ohms 5 running auaiting trigger VERTICAL remote talk position 10 0000 mVv dc ac BH lim LF rej SOs DC 2 0000 ms 8 0000 ms 18 0000 ms 2 00 ms div realtime 4 10 0 mv preset 10 0000 mV more probe This image displays the defibrillator current waveform for a 150J discharge into 100ohms The current probe is set to 10A division 10A 10mV The peak current is about 17A M4735A Service Manual 7 9 Waveforms 150J continued Waveforms 150J continued 150J 125 ohms 2ms div 4e running awaiting trigger HORIZONTAL remote talk 2 00 ms div i 25 kSa s 10 0000 ms i i reference Ald XL Ic ucl lx ctp ier GHA rion repetitive ealtime bead odio ENCES Taos vex Sed ON ue Hed ee onthe Fs Qu ve oes ou e aueh Li i i MEN on record length 10 0000 ms 20 0000 ms 2 00 ms div realtime 4 1020 wes adjust 0 m 10 0000
66. A far enough to access the fuse b Remove the fuse by pulling straight up from PCA as shown in See Figure 4 5 on page 4 12 Figure 4 5 Removing the Main Fuse Battery Eject Spring Battery PCA Spring Battery PCA 412000 Removal and Replacement External Assemblies Replacement 1 Snap the new fuse into position on the PCA 2 Restore the Battery PCA to its original position Push the Battery PCA back into the case being sure the lower edge of the PCA engages the slot in the bottom case 3 Replace the battery cover See Battery Cover on page 4 10 After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 M4735A Service Manual 4 13 External Assemblies Battery Eject Assembly The Battery Latch engages when the battery is fully inserted in the battery compartment and it is released by pushing the Battery Eject Button Removal 1 Remove the Battery Cover See Battery Cover on page 4 10 2 Remove the Battery Eject Button a Press the Battery Eject Button all the way in and hold it in b Usinga small flat bladed screwdriver press in the catch on the Eject Button and slide the Eject Button out of the case Note the orientation of the Eject Button See Figure 4 6 TIP The catch is located in the narrow slot in the bottom case that points to the eject button See Figure 4 6 3 Remove the Battery Eject Catch
67. Chinese M4735 69411 Portuguese M4735 69413 Russian M4735 69414 Polish M4735 69419 5 22 Replacement Parts Table 5 17 Key Components Key Components with PCI with PCI Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method Pacer Keypad Assembly Pacer Keypad M4735 60210 Date Code English M4735 69500 a a French M4735 69501 German M4735 69502 Dutch M4735 69503 Spanish M4735 69504 Italian M4735 69505 Swedish M4735 69506 Norwegian M4735 69508 Finnish M4735 69509 Chinese M4735 69511 Portuguese M4735 69513 Russian M4735 69514 Polish M4735 69519 Connectors Patient Connector M3500 69562 Patient Connector M3500 62601 Date Code Assembly Assembly SUPPLIES amp ACCESSORIES External Defibrillation Paddles External Sterilizable M4745A External Sterilizable M4745A Date Code Paddles Paddles External Paddles M4746A External Paddles M4746A Date Code M4735A Service Manual 5 23 Key Components Table 5 17 Key Components Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method Internal Defibrillation Paddles 7 5 cm Switchless M1741A 7 5 cm Switchless M1741A Date Code Internal Paddles Internal Paddles 6 5 cm Switchless M1742A 6 5 cm Switchless M1742A Date Code Internal Paddles Inte
68. Defibrillator Capacitor High Voltage Discharge Tool Touch Here First Then Touch Here Disarm Resistors Defibrillator Capacitor Foam Base M4735A Service Manual 4 3 Opening the Case Identifying Internal Subassemblies Refer to Figure 4 19 to identify the internal subassemblies Figure 4 19 Internal Subassemblies Patient Foam Defibrillator AC Power AC Inlet ECG Out SpO Connector Connector Base Capacitor Module Sync Connector ECG Connector Power IrDA Control Display Speaker Energy Select PCA PCA PCA Knob amp Switch 432000 0 6 lt Removal and Replacement Internal Assemblies Top Case Internal Assemblies Top Case This section provides instructions for removing and replacing assemblies found in the top case These assemblies include Assembly Page Lithium Backup Battery 4 34 Control PCA 4 36 Shield Plate 4 40 Keyscan PCA 4 42 Bezel Assembly 4 48 Energy Select Switch 4 52 Display Assembly 4 54 Parameter PCA 4 56 SpO2 PCA 4 58 ECG Connector 4 60 SpO2 Connector 4 62 Speaker 4 64 AC Mains Connector 4 66 ECG Out Sync Connector 4 69 Pacer Keypad 4 70 Replacement Top Case 4 75 M4735A Service Manual 4 33 Internal Assemblies Top Case Lithium Backup Battery The Lithium Battery maintains the unit s stored information on the Control PCA when the main battery is removed or depleted When replacing the Lith ium Battery also replace the cable tie wrap ordered separate
69. Dres RES RCM UN 3 2 vy M 3 24 Iso MN 3 25 tnr c 3 26 Wn MT 3 27 KEYS 3 28 Battery ang Charging Circuits 24 usi t eed rca te nda Scu d dep RU EN SIUE dde RUE 3 29 Data OSA MT UU cT HN TNR 3 30 Callins for SOEVIGO ausddod aed A DNO UN OR EU nn CV m dni dM PD RA nM EM 3 31 United States of America 12i eee iic quei edexdu base Denu etl e nsi loma ib Loaatepstbeuedtanaeeeesl bu M LDE 3 31 Ca ada aga gs ete 3 31 Other International PN AG secessit ieu en bh Op Est idi o HOM onda ER ES 3 31 Equipment DuTormatloll a3 oo ices tes ceadsaet anes dg ven lla a etu ce uices a 3 31 Removal and Replacement MEV A P 4 Chapter Contents NL 4 1 Servicing IN OS cass EE 4 Key oT TN oases dives tede tia dime db mm dde teat es 4 1 Removal Handling and Replacement 22 certet tetto odisse ser sts e ts estu tndtiga 4 2 Tool R g irem ntS T H 4 3 vi Contents DU M 4 3 External Assemblies sissisota MEE H EFE UP dur prb qud Rio rU ONIS 4 4 Userreplaceable Parts and Accessories 1 nee uites tui iai t edenb secet itn Alea eqiq Uis tss aad es 4 5 User Wiat CMAN M
70. ECG monitoring electrodes lead wires dressings etc Contact with metal objects may cause electrical arcing and patient skin burns during defibrillation and may divert current away from the heart Specifications Safety Considerations WARNING During defibrillation air pockets between the skin and multifunction defib electrode pads may cause patient skin burns To help prevent air pockets make sure the pads completely adhere to the skin Do not use dried out pads do not open pads package until just prior to use WARNING Never touch the patient or any equipment connected to the patient including the bed or gurney during defibrillation WARNING Never operate the Heartstream XL in standing water WARNING Do not immerse or pour fluids on any portion of the Heartstream XL WARNING Do not use the Heartstream XL in a flammable or oxygen rich atmosphere This can cause an explosion hazard WARNING Avoid connecting the patient to several devices at once Leakage current limits may be exceeded Do not use a second defibrillator on the patient while pacing with the Heartstream XL NOTE The Heartstream XL can be operated with only AC line power only 12v M3516A SLA Battery or AC power and M3516A SLA battery simultaneously WARNING Avoid contact between the patient and conductive fluids and or metal objects such as the gurney Contact with metal objects could cause unintentional current pathways WARNING Operating the Heartstream XL
71. Eject Assembly 5 12 Data Card door 5 12 main fuse 4 12 5 9 Flex circuit connection 4 2 Front End FE test 2 24 Leads Pads 2 30 Functional Check 2 4 ECG 2 16 Shock Advisory 2 17 SpO2 2 18 Synchronized Cardioversion 2 18 Heart Rate HR function 2 16 Heartstream XLT safety precautions 7 17 Immunity level 7 20 Incompatible Data Card 3 15 Indicator functions 6 11 7 2 7 3 Installation 1 2 Internal subassembly 4 32 IRDA test 2 23 Key See Softkey Key Component 4 1 5 21 Key Inactive 3 15 Keypad See Manual Keypad Label branding label set 5 17 case label set 4 20 4 T Primary 4 98 speaker assembly 5 17 LCD Display See Display Leads FE test 2 30 Leads Off 3 12 3 18 3 19 LED 7 2 Lithium Backup Battery 4 34 5 7 5 9 6 15 Load impedance 7 2 Low Battery 3 12 M3500B Unit Exchange Program 5 5 Main fuse 4 12 5 9 Maintenance 1 2 Mandatory testing External Repairs No Trouble Found 2 2 Internal Repairs 2 3 printer 2 3 Manual Keypad removing and replacing 5 11 5 22 testing 2 25 Manual Mode 1 1 3 21 7 2 Momentary message 3 14 Monitor Failure 3 12 Index Monitoring electrode 5 19 ms to Charge 2 37 No Data Card Present 3 13 No Pads 3 12 No Shock Delivered 3 14 3 24 Non Pulsatile 3 13 Operational 3 18 Operational Problems table 3 4 Pacing 6 11 operational problems 3 24 Pacer Failure 3 13 Pacer Hardware Not Installed 3 24 Pacer Output Low 3 13 specifications 7
72. FI is causing artifact Suggested Solution Check that the paddles or pads are properly applied If necessary pre pare the patient s skin and reapply or apply new pads Check the date code on the pads Do not open the pads package until immediately prior to use Relocate or turn off equipment that may be causing RFI QRS beeper inaudible or beeps do not occur with each QRS complex The QRS beeper is configured to Off The volume is set too low The amplitude of the QRS complex is too small to detect Configure the QRS beeper to On Adjust the volume Adjust the size of the ECG Fails ECG Test in Diagnostic Mode Failure in Pads ECG front end or signal processing Failure in Leads ECG front end or signal processing 1 Replace Power PCA 2 Replace Control PCA 1 Replace Control PCA 2 Replace Parameter PCA SpO Monitoring The following table covers problems that might arise while monitoring SpO NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 8 Operational Problems SpO Monitoring Symptom No response no value on screen no pleth bar Possible Causes Bad internal connection SpO PCA failure Control PCA failure Parameter PCA failure Suggested solution Carefully reseat flex cables between SpO connector and SpO PCA and betw
73. Heartstream XL is not intended to be deployed in settings or situations that promote use by untrained personnel Operation by untrained personnel can result in injury or death Remain attentive to the patient during the delivery of therapy Delay in delivering a shock may result in a rhythm that was analyzed as shockable converting spontaneously to non shockable and could result in inappropriate delivery of a shock Use only the multifunction defib electrode pads battery and accessories listed in Table 5 16 on page 3 18 Substitutions may cause the Heartstream XL to function improperly Use multifunction defib electrode pads prior to their expiration date Discard pads after use Do not reuse pads Do not use for more than 8 hours of continuous pacing In AED Mode the multifunction defib electrode pads must be in the anterior apex position as shown on the packaging The Heartstream XL was not designed to assess data acquired from pads in an anterior posterior position Use only 3 wire AC power cords with 3 pronged grounded plugs Keep hands and feet clear of paddle electrode edges Use your thumhs to depress the shock buttons on the paddle handle CAUTION WARNING 7 16 Conductive parts of electrodes and associated connectors for applied parts including the neutral electrode should not contact other conductive parts including earth Do not allow multifunction defib electrode pads to touch each other or to touch other
74. M beue 5 1 Ordering Replacement Parts 2 1 Endet teda pIa bu bone iM M BUD E NEM eui dia E 5 1 Ordering Supplies and Accessories xcs atcapu Qaid o peer vu tui ER eam tesa oic ate sib ernst 5 1 Key Components PC c 5 2 Calling for NOVICE n atis pus ied Meta ofa aa Ur n QR HU CU Er od ra A CUM Moreti diua 5 3 United States of Amer Ca ee etie ceres toe etit en tete baee ee cede ee E aee eee deba ae 5 3 Ca ada zsaczeksuscre REID Bii tepe te bend te ete epe tede 5 3 Other International Areas sesesssseeeseeenereeee ene eenenmnnnnne en ennetennn nnne seen sene nena nennen 5 3 SpEcial TOOLS ETE 5 4 M4735A Unit Exchange Program eseeeseseeseeesesessesseeesrrssrrseeereesserssressessernsreeseesereee 5 5 Replacement Parts Tables snenennesseeesseeseeeesseesssseeseesssresseeesseeessressesesereessseenseeeseeee 5 6 Electical Ass emblies aeo aera ctt S Ui HE AN UN RIR iE EE ea IEEE EE E S IEEE 5 7 Control PCA e 5 7 Other Replacement PUAS eese tees e epis tin End i ast iooni sen esos a sep ERU EpRU EE ba REES 5 8 Other Electrical Assemblies iini tiere eese irae e vues ce reser iie ei eR LED Ren 5 8 Individual Electrical Parts seesesseseseeeeeeeee eee enne enhn eene netiis 5 9 Mechanical Assemblies aussen ea ANN P BR DOR MIN ISI RR IRE a Ti 5 10 Bezel Asse AP 5 10 Pacet K ypa d ASS mMBly et c MY 5 11 Other Mechanical Assemblies sssseeeeeenemene
75. M4735 69704 Italian M4735 69705 Swedish M4735 69706 Norwegian M4735 69708 Finnish M4735 69709 Chinese M4735 69711 Portuguese M4735 69713 Russian M4735 69714 Polish M4735 69719 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 5 15 Labels 5 16 Case Label Sets The Case Label Set is available for units both with and without SpO in the following supported languages See Figure 4 10 on page 4 21 for correct placement of these labels Table 5 13 Case Label Sets Without SpO Language Part Number English M4735 69800 French M4735 69801 German M4735 69802 Dutch M4735 69803 Spanish M4735 69804 Italian M4735 69805 Swedish M4735 69806 Norwegian M4735 69808 Finnish M4735 69809 Chinese M4735 69811 Portuguese M4735 69813 Russian M4735 69814 Polish M4735 69819 Replacement Parts Table 5 15 Other Labels Table 5 14 Case Label Sets With SpO3 Labels Language Part Number English M4735 69820 French M4735 69821 German M4735 69822 Dutch M4735 69823 Spanish M4735 69824 Italian M4735 69825 Swedish M4735 69826 Norwegian M4735 69828 Finnish M4735 69829 Chinese M4735 69831 Portuguese M4735 69833 Russian M4735 69834 Polish M4735 69839 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on
76. P e The Pads FE test checks that communication is working between the Pads FE and the DSP e The DSP test checks that communication is working between the DSP and the rest of the monitor 5 DC Offset This test is for manufacturing use only and should be ignored 6 Testthe ECG amplifier These tests measure both the gain and the noise of the two ECG amplifi ers Leads and Pads Both use the Peak to Peak reading The Peak to Peak reading measures the peak to peak amplitude of the sig nal appearing on the selected ECG input If the simulator s calibrated output is 1 0 mV then the Peak to Peak reading should be 1000 10 100 for both Monitor and Diagnostic If the simulator output is cali brated to some other value the displayed value should be 1000 x simula tor output 10 NOTE The diagnostic frequency response is only available when using the ECG Leads input When the unit is set to Pads the display will indicate dashes for the Diagnostic Peak to Peak value 2 30 Performance Verification and Safety Tests Performance Verification a Perform the amplifier gain test 1 Connect the ECG simulator to the pads cable Set the simulator output for sine wave 2 Hz or 10 Hz 1 mV peak to peak Following the instructions under Step 3 on page 2 30 for chang ing settings set Selected lead to Pads Only the Monitor frequency response will be available Wait for the displayed value under Monitor to
77. Pass Sp02 Pass Pacer Pass Performance Verification and Safety Tests Performance Verification 4 Check the results a M4735A Service Manual Check the time and date e Check the printout to verify that the time and date are correct e If they are not reset them using the Configuration Mode See Configuration Mode on page 2 10 Check the test results The results of the following tests will appear on the display and on the printout e RAM Tests the Read Only Memory ROM e ROM Tests the Random Access Memory RAM e System Tests the integrity of the core processing system and checks the Lithium backup battery Data Card The Data Card test writes a small file to the data card reads it back and checks it then erases that file If no Data Card is present the test result will be Not Tested CODEC The processor turns on the CODEC coding decoding chip used for voice prompts and gets an acknowledgement that it s ready to receive data It does not give the CODEC actual data to process IRDA Tests the infrared communications port If no active infrared device is within range the test result will be Not Tested Timebase The Timebase test compares the Real Time clock to the System clock to check for discrepancies It does not test the SpO clock or the Biphasic clock 2 23 Performance Verification e DEFIB The Defib test charges the defibrillator capacitor and then disa
78. Reusable SpO Sensor M1194A Ear Clip Reusable SpO Sensor M1943A Nellcor SpOs Adapter Cable Data Card M3510A Data Card M4735A Service Manual 5 19 Supplies amp Accessories Part Number Description Battery Charger M3516A Sealed Lead Acid Battery MA4A747A Battery Charger Kit Includes Battery Charger Adapter Exter nal AC Power Module and Battery Test Load M1781A Defibrillator test load Sync Cable M1783A Sync Cable For Synchronized Cardioversion with an External Patient Monitor Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 5 20 Replacement Parts Key Components Key components require tracking as indicated below Record the Part Num ber and either the Date Code or Serial Number for both the failed component and the replacement component Table 5 17 Key Components Key Components Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method ELECTRICAL ASSEMBLIES Control PCA Control PCA M4735 61100 Serial Number American English M4735 68100 French M4735 68101 German M4735 68102 Dutch M4735 68103 Spanish M4735 68104 Italian M4735 68105 Swedish M4735 68106 Norwegian M4735 68108 Finnish M4735 68109 Portuguese M4735 68113 Russian M4735 68114 Polish M4735 68119 B
79. Speaker Connect the speaker to the Control PCA Refer to Figure 4 20 on page 4 37 After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 65 Internal Assemblies Top Case AC Mains Connector The AC Mains Connector is located at the rear of the top case on the back wall It is part of one assembly with the ECG Out connector Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect and remove the ECG Out Sync Connector a Disconnect the 3 pin connector from the Parameter PCA Press on its latch to release b Using a pliers or wrench loosen the large nut on the ECG Out Con nector Remove the nut and the washer c Remove the ECG Out Connector from its hole It will still be attached to the AC Mains Connector 2 Remove the AC Mains Connector a The AC Mains Connector should already be disconnected from the AC Pow
80. a Rotate the Energy Select knob to turn on the power You may hear a click from the speaker If so the power supply capacitors are now discharged b If you do not hear a click use the Secondary Method The power supply capacitors may not be discharged Secondary Method 1 Open the case See Separate the Case on page 4 26 Stop after completing step 7 DO NOT disconnect the case halves yet 2 Discharge the defibrillator capacitor See Discharge the Defibrillator Capacitor on page 4 30 Note the condi tion of the Discharge Pathway 3 Disconnect and remove the defibrillator capacitor See Defibrillator Capacitor on page 4 84 Leave the foam in place on the capacitor wires 4 Disconnect the battery connector Unplug the 4 pin battery connector from the Power PCA See Figure 4 14 4 24 Removal and Replacement Opening the Case 5 Use the disarm resistors to discharge the power supply capacitors a Using 2 clip leads connect one clip lead to each end of one of the Disarm Resistors b Touch the other ends of the 2 clip leads to the two middle pins of the battery connector on the Power PCA Maintain this connection for at least 5 seconds The power supply capacitors are now discharged CAUTION If the Disarm Pathway was found to be damaged in the earlier steps repeat step 5 using the other Disarm Resistor 6 Disconnect the case halves See Separate the Case on page 4 26 Complete steps 8 and 9 F
81. abel and Screws po Ds Platen and Roller Label Sliding Door M4735A Service Manual 4 7 Printer ribbon cable External Assemblies 3 Remove the printer assembly Pull the printer straight up out of the printer bucket See Figure 4 2 on page 4 8 4 Disconnect the ribbon cable Unlatch the connector latches and unplug the ribbon cable as shown in See Figure 4 2 on page 4 8 TIP 1f you are installing a replacement printer remove the 4 screws now If you are moving the printer to a new Top Case Assembly save work by leaving the screws in place Figure 4 2 Removing the Printer Connector Ribbon Cable AB Removal and Replacement M4735A Service Manual External Assemblies Replacement 1 Replace the 4 screws a b Open the paper door Place the 4 screws in their holes in the printer Use tweezers or fine nose pliers to replace the 2 screws under the sliding door 2 Reconnect the ribbon cable a b Align the ribbon connector and push it straight into the connector on the printer Engage the 2 latches on the ends of the connector 3 Lower the printer straight down into the instrument 4 Tighten all 4 screws 5 Replace the label a Remove any adhesive residue by rubbing the dry surface with your finger and rolling up the adhesive residue Solvents are ineffective as is scraping with a tool b Clean the surface with isopropyl alcohol Allow it to dry
82. able assemblies and sub assemblies Chapter Contents The major sections of this chapter are as follows Section Page Ordering Replacement Parts 5 1 Ordering Supplies and Accessories 5 1 Key Components 5 2 Calling for Service 5 3 Special Tools 5 4 M4735A Unit Exchange Program 5 5 Replacement Parts Tables 5 6 Ordering Replacement Parts To order replacement parts e In the US call 800 227 8164 e Outside the US contact your local Agilent Technologies office Ordering Supplies and Accessories To order accessories and supplies e Visit our Medical Supplies website at www healthcare agilent com mpgsupplies e Inthe US call 800 225 0230 e Outside the US contact your local Agilent Technologies Sales Office or your authorized Agilent Technologies Dealer or Distributor 5 1 6 29 00 5 2 Key Components Replacement assemblies marked with an asterisk contain one or more Key Components Key Components require detailed tracking by recording the key component part number and either the key component s date code or its serial number This data must be recorded for both the failed assembly and the replacement assembly Agilent Technologies service personnel must record this information on the Customer Service Order CSO The Key Components that are part of the replacement assemblies are listed in Table 5 17 on page 5 21 Replacement Parts M4735A Service Manual Calling for Service Calling for Ser
83. ace the shield plate See Shield Plate on page 4 40 Replace and reconnect the Control PCA See Control PCA on page 4 36 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 51 Internal Assemblies Top Case Energy Select Switch The following describes how to remove and replace the Energy Select Switch Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 3 Remove the Energy Select Knob Grasp the knob and pull straight out from the Front Bezel TIP To get a better grip on the knob try wearing rubber gloves Removal Disconnect and remove the Energy Select Switch a Unlatch the connector and unplug it from the Keyscan PCA b Usinga pliers or wrench loosen and remove the large nut holding the Energy Select switch into the Bezel Remove the switch Figure 4 27 Energy Select Switch and Knob Dark Stripe on Ribbon Cable Energy Select Switch Square Ribs on B
84. acitor before performing any service opera tions on this unit See Separate the Case on page 4 26 Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after repair 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Lift the capacitor out of the way Lift up the defibrillator capacitor and its foam base Lift straight up then turn and rest them on the Power PCA See Figure 4 41 on page 4 85 2 Disconnect the capacitor a Before disconnecting the capacitor note the polarity and routing of its 2 wires the red wire to the spade connector next to the red inductor and the white wire to the spade up in the corner of the Power PCA b Unplug the defibrillator capacitor from the Power PCA by pulling straight up on its spade connectors with needle nose pliers Take care to not stress the wires 3 Remove the capacitor a Slide the wires out through the hole in the foam base b Using a clip lead short the capacitor s terminals together to prevent charge accumulation and lay the defibrillator capacitor aside Replacement 1 Replace the capacitor a The new capacitor will come with a shorting bar connecting the two terminals Disconnect the shorting bar b Slide the wires through the large hole in the foam base 2 Connect the capacitor Plug the terminals onto the spade connectors on the Power PCA Orient
85. acity TeSt seian Tc RIO 2 40 V 6 29 00 Contents Troubleshooting cai ec ESE 3 1 Chapter COntEntS PT FENERE 3 1 Repair Philosophy de i aiae 3 1 Equipment Regmir d seiniin eai EE RO E E e E E E CEA utes 3 1 Troubleshooting and Repair Methodology eene 3 2 Methodology Overview 25i o dedico dedii ea dioi delubro thue aida eap Mud M in dd 3 2 Ita ASSESSMENT srono QR RU MANI enue MaMa eda pe t E DM 3 3 Diagnosing External Failures iassenvent bond rien rpdietee tete ee tr aiso ie eeii 3 4 Diagnosing Internal Failures usse Mid die Sa e doo dE e eps cial edd i oed 3 5 Troubleshooting Tables Pt Q 3 6 Usine the Tables e 3 6 General Problems cease peces pesa te DR REA Hd E ae ae E E Ea d 3 8 Unit Dre STIS IG 225 secs eR edente a e eaa iiae ttes lle m t TE 3 8 Error i e 3 10 System MIBSSHBEN oo ien otio atras CRM Cade bes Dead tutae a Cn Iesu Miu Du SEEE Catia uS 3 12 Momentary WIGS Sd g s Lassesmsatememumen qoid a dn pend E Ia ep EUM MICA E 3 14 uM Wc UH 3 16 Extended Self Test Failures edicit m aset teibsepilaciliqesu on densa las e unes ead iseia 3 17 Oporauonal Problems uscito e n aO ORO REN OUR tdt e ru edt ecd etis ases 3 18 pesquero 3 18 Sy INU C hence 3 20 Defibrillation and Cardioversion 422 cien die Ioa era oen bu od toin bite ee a
86. al devices e Does the SpO2 value change dramatically when the AC line cord is unplugged Once the source is located attempt to attenuate the EMC coupling path by distancing the defibrillator from the source as much as possible If assistance is needed call your local service representative M4735A Service Manual 7 19 Electromagnetic Compatibility Restrictions for Use Artifact on the ECG caused by electromagnetic interference should be evalu ated by a physician or physician authorized personnel to determine if it will negatively impact patient diagnosis or treatment Immunity Level The EMC standards state that manufacturers of patient coupled equipment must specify immunity levels for their systems It is recognized that the M4735A defibrillator monitor is designed to receive and amplify low level signals in the same bandwidth as the interference Immunity is defined in the standard as the ability of a system to perform with out degradation in the presence of an electromagnetic disturbance Degrada tion in ECG quality is a qualitative assessment which can be subjective Caution should therefore be taken in comparing immunity levels of different devices The criteria used for degradation is not specified by the standard and may vary with the manufacturer NOTE 7 20 For additional information about compliance with the EMC standards please see the Declaration of Conformity Statement available at http www
87. also enables you to store data and events on an M3510A 1 1 6 29 00 Overview Data Card for downloading to the CodeRunner Web Data Management Sys tem Batteries The M4735A is powered by a rechargeable Sealed Lead Acid SLA battery M3516A Proper care of these batteries will ensure that they have the energy required to operate the M4735A and deliver the appropriate therapy See Battery Maintenance section in User s Guide NOTE 1 2 The defibrillator will take longer to charge when powered with AC without a battery installed To ensure optimal performance always have a fully charged battery in the defibrillator even when using AC power Installation The M4735A does not require installation The User s Guide describes the setup required before placing the device into service as well as configuration options Upgrades Upgrades are available to add specific functionality to units in the field As of the publication of this manual these upgrades are e M4738A Pacing Upgrade adds pacing e M4739A SpO upgrade adds SpO Consult your sales representative or dealer or distributor for the latest details Preventive Maintenance Preventive maintenance and periodic operational checks are intended to be performed by the user Both topics are covered in the Maintenance chapter of the User s Guide Introduction Overview Repair Philosophy Defibrillator Monitor The repair philosophy of the M4735A
88. analyzer s display to read 0 c Turn the defibrillator on and from the Diagnostic Menu Select the Defib Meas Test and press ENTER Charge and Disarm a 200J shock a Use the Energy Select control to select 200J b Press the CHARGE softkey to charge the defibrillator c Press DISARM Check the analyzer readings Read the delivered energy indicated by the defibrillator analyzer It should be 0J or be blank Check the values displayed by the M4735A The results displayed by the M4735A should be as follows Available Energy Not recorded failure if 0 Msec to charge Ignore tested earlier Delivered energy Blank Impedance Blank Peak current Blank Defib errors Not recorded failure if any reported Performance Verification and Safety Tests Performance Verification Safety Tests This section covers tests of the defibrillator s electrical safety Using the procedures called out by the manufacturer of the analyzer in use measure and record the following data Only test at the AC Mains line volt age used in the customer s facility there is no need to test both 120VAC and 240VAC Also test both Normal and Reverse Polarity line connections and record the worst case value Earth Leakage Normal Condition lt 500 uA lt 300 uA for UL Record as aaa Single Fault Condition 1000 uA Record as bbbb Patient Lead Leakage Test both Leads C and paddles pads B inputs M4735A Service Manual
89. and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 63 Internal Assemblies Top Case Speaker These instructions describe how to remove and replace the speaker assembly Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the Speaker Disconnect the speaker from the Control PCA Refer to Figure 4 20 on page 4 37 to identify the speaker connector 2 Remove the speaker a Remove the 2 screws and clamps from the speaker See Figure 4 33 b Peelup the tape holding the wires in place Lift the speaker and its wires out of the case Figure 4 33 Removing the Speaker Clamp Speaker 2 Total 404 Removal and Replacement Internal Assemblies Top Case Replacement 1 Replace the Speaker a Place the new speaker into position in the case b Install both clamps and both screws See Figure 4 33 on page 4 64 c Lay the wires in the same position in the case as were the original wires and secure with the original tape or with other plastic electrical tape 2 Connect the
90. are all generated and formatted by the Control PCA using either data it has or data it receives from other parts of the unit Indicator Functions All front panel LEDs Syne Pacer AC Power and Batt Charge are controlled by the Control PCA The LEDs are connected into the Keyscan PCA via flex cir cuits they are then routed to the Control PCA via a ribbon cable Key Functions All keys both on the Main Keypad and on the Pacer Keypad connect to the Keyscan PCA via flex circuits Keypresses from all keys are detected and processed by the Keyscan PCA and then passed to the Control PCA via a large ribbon cable The Control PCA then interacts with the other parts of the system as needed to respond to the keypress M4735A Service Manual 6 11 System Functional Descriptions 6 12 Energy Select Switch The Energy Select Switch selects operation in either AED Mode or Manual Mode In Manual Mode energy selection is made by rotating the Energy Select Switch to the appropriate position The Energy Select Switch signals pass through the Keyscan PCA and then on to the Control PCA via a large ribbon cable The Control PCA then interacts with the other parts of the system as needed to respond to the setting of the Energy Select Switch Printing Functions All printing data are handled by the Control PCA Waveforms graphics numeric values and messages are all generated and formatted by the Control PCA using either data it has or data
91. c Peelthe backing off the new label Avoid touching the label adhesive d Align one edge of the label with the recess on the sliding door then roll the label down into position e Press firmly all over the label especially the edges to ensure it adheres to the door After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 4 9 External Assemblies Battery Cover The instructions that follow describe how to remove and replace the battery COVer Preparation 1 Remove the battery 2 Remove the paddles from their retainers 3 Turn the unit over Turn the unit upside down with the handle facing you The battery cover is at left side of the bottom surface Removal 1 Remove the battery cover Remove the 7 screws as shown in Figure 4 3 TIP The screws are size coded Remove only the T10 screws 2 Liftthe battery cover up Figure 4 3 Removing the Battery Cover EE e e ua a in c Mm AY ut A 5 it e E ET cm T TT ut Em x in i ud e al E s FRE i E ET Battery Cover Bottom Case Replacement 1 Check the Battery PCA and the Battery Eject Spring a Ensure the lower edge of the Battery PCA is seated in its slot in the case b Check that the Battery Eject Spring is all the way at the bottom of its slot 4 10 Removal and Replacement External Assemblies c Check the orientation of t
92. ccesasagedasadinecdssannonedsiaasedaaasudecesasaaoan anseaaceaasnsseesasneeadaaadsedeaonsoersoaneds 7 7 Waveforms 1501 iisipsesetiber uidi ad pM nen Melman ENS 7 8 Waveronms 200 sciiacadandicaiin UR qa IN REQUE AM ae MD dU DS 7 11 symbol Definitions scoobistere ei ries oe dress e Mei cass ta pesar apg Rear S app pA ERU UHR 7 14 Safety Considerations iuo se bai reis p rte PRAEU SUR IMPR A UI NUM REP IM HMM REIS IR KRAMER S ERA IEEE 7 16 Electromagnetic Compatibility 52iekbcdit erac RbU DRM iR RU quid aside HD pO AED B pere ieus 7 19 Reducing Electromagnetic Interference viccicsciscsiedssnessecsasescecdaansiecssasedacsasnscedsnasssansaaevens 7 19 ic aae OLD di A HR 7 20 Inmunty Level E 7 20 Contents This page intentionally left blank 1 Introduction This Service Manual provides the information needed to successfully service the Agi lent M4735A Heartstream XL Defibrillator Monitors The intended users of this man ual are technical personnel who have been trained in the safe and proper servicing of the M4735A Overview In this chapter you ll find general information that you should become famil iar with before servicing the M4735A Detailed information regarding con trols operation and capabilities of the instrument can be found in the User s Guide M4735 91900 that was shipped with the product We recommend you review the User s Guide before servicing this d
93. ce left Gig right repetitive ealtime eee Ses T eae MdL are i sequential i wr on record length 0 000 s 10 0000 ms 20 0000 ms 2 00 ms div realtime ES adjust m 10 0000 mV e Kurs sample clock This image displays the defibrillator current waveform for a 150 discharge into 125bohms The current probe is set to 10A division 10A 10mV The peak current is about 144 Note that the trailing edge of the waveform is just off the right edse of the screen 200J 125ohms 5ms div P running auaiting trigger HORIZONTAL remote talk 5 00 ms div 10 000 ms reference left Gi right repetitive ealtime sequential on i record length 10 000 ms 35 000 ms 5 00 ms div realtime adjust 10 ksass sample clock This image displays the defibrillator current waveform for a 200J discharge into 125ohms The current probe is set to bA div bA 10mV The peak current is about 16A The timebase for this image is 5msjdiv 15 000 ms M4735A Service Manual 7 13 Symbol Definitions 7 14 Symbol Definitions The following table lists the meanings of each symbols shown on the M4735A and the M3516A battery Table 7 2 Defibrillator and Battery Symbols Symbol Definition Shock hazard Caution See operating instructions in User s Guide gt gt Input 2 Meets IEC type BF leakage current requirements and is defibrillator protec
94. ce printer Paper moves then stops Door improperly latched Paper improperly loaded or jammed Check door latch Reload paper or clear jam Paper moves but printing is faint or absent Door improperly latched Dirty printhead Printer failure Control PCA failure Check door latch Clean printhead Replace printer Replace Control PCA Paper moves but print quality poor or some dots missing Dirty printhead Printer failure Clean printhead See Cleaning the Printer Printhead on page 4 5 Replace printer Loud buzzing or grinding noise Door improperly latched Check door latch Waveforms or text distorted even though they look OK on display Printer failure Control PCA failure Replace Printer Replace Control PCA Black line running along paper Dots printhead elements stuck on due to Printer failure Control PCA failure Replace Printer Replace Control PCA M4735A Service Manual 3 25 Operational Problems Table 3 11 Operational Problems Printer Symptom Possible Causes Suggested solution White line running along paper Dirt on printhead Dots printhead elements stuck off due to Printer failure Control PCA failure Clean printhead See Cleaning the Printer Printhead on page 4 5 Replace Printer Replace Control PCA Fails Printer Test in Diagnostic Mode other then sy
95. ch in the plastic frame with the tab on the PCA b Press the Power Module down into position Be sure it aligns cor rectly with the raised screw holes in the bottom case 2 Connect the AC Power Module a Connect the 2 pin in line connector to the Battery PCA be sure it latches b Connect the 6 pin connector to the Power PCA be sure it latches c Connect the 4 pin connector to the Power PCA be sure it latches 3 Replace the Defibrillator Capacitor Restore the Defibrillator Capacitor to its original position on the Power PCA W2 Removal and Replacement Internal Assemblies Bottom Case 4 Replace the screws a Mate the 2 case halves together b Hlip the unit over bottom side up c Replace the 2 T15 screws and tighten d Flip the unit rightside up and unmate the case halves Figure 4 46 Replacing the AC Power Module AC Power Module Notch in Plastic Frame Tab on Power PCA Power PCA did After Repair After repairs are complete perform the following steps 5 Reassemble the case See Closing the Case on page 4 99 6 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 7 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4
96. continuous beep of about 7 seconds System failure processors not communicating Turn power off then on If problem reoccurs replace Control PCA At any time a repeating tone that alternates between two frequencies The unit emits this tone beginning 1 minute before shutdown due to low battery charge 1 Connect an AC Power Cord or replace the battery with one that is fully charged 2 Replace the AC Power Cord 3 Service the unit See Trouble shooting on page 3 1 3 16 Troubleshooting General Problems Extended Self Test Failures Should the unit report a FAIL in the Extended Self Test resolve it using the solutions below NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 6 Extended Self Test Failures Failure RAM ROM System CODEC IRDA Timebase Possible Cause Failure on Control PCA Suggested Solution Replace Control PCA System FAIL 10 Lithium backup battery failure Replace lithium battery Data Card Data Card full or incompatible or Replace Data Card with new empty defective M3510A Failure on Control PCA Replace Control PCA Pacer Failure on Power PCA Replace Power PCA Defib Failure on Control PCA Replace Control PCA FE Failure on Control PCA Replace Control PCA Failure on Power PCA Replace Power PCA Failure on Param
97. ctions for running Performance Verification tests on the M4735A The tests are sequenced to check more basic functions first and then build on that to check more complex functions We recommend you perform these tests in this sequence If desired you can make copies of the Test Results Matrix page 2 4 and use it to record results The Performance Verification tests include Section Visual Inspection Functional Checks Diagnostic Tests Safety Tests Battery Capacity Test Page 2 15 2 16 2 19 2 39 2 40 Performance Verification and Safety Tests Performance Verification Visual Inspection 1 Inspect the unit Inspect the entire unit especially paddles power cord printer battery cables and sensors for signs of the following Wear or damage to paddles cables and adapters Wear or damage to patient cables and associated strain reliefs Mechanical damage to case membrane switches speaker cover ambient light sensor cover display window Loose or missing hardware Evidence of liquid spill Check inside the printer bucket and clean out any accumulation using gloves and an approved cleaner Residue on the thermal printhead Printer roller wear Wear or damage to power cord and associated strain relief Corrosion on connector pins printer parts or battery contacts Pass Only normal wear no damage serious enough to inhibit performance No corrosion visible 2 Check the consumables Check the ECG
98. d active Try moving cable leads try relocat ing unit Pads Replace Power PCA Leads Replace Parameter PCA Replace Control PCA Only have one active instrument on the patient at a time Flat line no waveform no Leads Off or Pads Off message Short in internal ECG wiring or front end Failure in signal processing circuits Pads 1 Replace Power PCA 2 Replace Patient Connector its internal cable Leads 1 Replace Parameter PCA 2 Replace ECG connector internal ECG cable Replace Control PCA 3 18 Troubleshooting Table 3 7 Operational Problems ECG Monitoring Pads or Leads Operational Problems Symptom Leads Off message even though ECG cable has been replaced and is properly connected to the simula tor Possible Cause Open in internal Leads ECG wiring or front end due to Cable from ECG Connector to Parameter PCA has bad connec tion Defective ECG Connector or cable to Parameter PCA Defective Parameter PCA Suggested Solution Reconnect cable properly See Servicing Notes on page 4 1 Replace ECG Connector Replace Parameter PCA Pads Off message even though pads cable has been replaced and is properly connected to the simula tor Open in internal Pads ECG wiring or front end due to Cable from Patient Connector to Power PCA has bad connection Defective Patient Connector or cable to Power PCA Defective Power PC
99. d the PCA traces that connect them See Figure 4 18 3 Choose a discharge method If the Disarm Pathway is intact refer to See Figure 4 18 on page 4 31 and use the Primary Method below to discharge the defibrillator capacitor If you see any burns or damage the Disarm Pathway may not be intact Use the Primary Method then also use the Secondary Method to discharge the defibrillator capacitor Primary Method a Using the High Voltage Discharge Tool first touch one end of the tool s brass bar to the current sensing resistor the small loop of flat metal See See Figure 4 18 on page 4 31 Then pivot the brass bar so its other end contacts the exposed end of the disarm resistor Maintain contact at these two points for at least 5 seconds The defibrillator capacitor is now discharged Removal and Replacement Opening the Case Secondary Method a Using 2 clip leads connect one clip lead to each end of one of the Disarm Resistors b Touch the clip leads directly to the spade terminals on the Power PCA where the Defibrillator Capacitor is connected Maintain this connec tion for at least 5 seconds TIP Another way to make this connection is to clip the leads to test probe leads the use the test probes to touch the spade terminals c Repeat steps a and b using the other Disarm Resistor The defibrilla tor capacitor is now discharged even if one of the resistors is dam aged Figure 4 18 Discharging the
100. de Pads connector or internal wiring failure Power PCA failure Control PCA failure Parameter PCA failure e CHARGE key failure Diagnose as follows 1 Try Manual Mode Charges OK Go to step 3 e Still not charge Go to step 2 2 Verify Pads Off and Cable Off detection by unplugging pads cable Detects OK Go to step 3 Either Pads Off or Cable Off fail replace 1 Pads connector 2 Power PCA 3 In Diagnostic Mode run Controls Test and test CHARGE key Key tests OK Replace Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA M4735A Service Manual 3 21 Operational Problems Table 3 9 Operational Problems Defibrillation and Synchronized Cardioversion Message or Symptom Won t discharge Possible Causes Control PCA failure Parameter PCA failure SHOCK key failure Suggested solution Diagnose as follows 1 In Diagnostic Mode run Controls Test and test SHOCK key Key tests OK Replace Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA Charges but disarms when press Shock Patient impedance sensed as too high or too low during energy deliv ery due to Pads losing contact with patient Pads failure Pads cable failure Power PCA failure Control PCA failure Replace paddles or pads and pads cable Replace Power PCA Replace Contro
101. dware inside c Look into the screw holes at the back corners of the case where the tall case posts are located Check that the post screw holes line up with the screw holes in the case 6 Replace the case screws a Place the unit on the work surface upside down b Replace the 1 T15 case screw located in the battery compartment M4735A Service Manual 4 99 Closing the Case 4 100 c Replace the Battery Cover as described in Battery Cover on page 4 10 d Turn the unit over rightside up e Install a battery If the battery does not readily latch into place check for a case screw or other hardware lodged against the Battery PCA Also check that the Battery PCA is installed correctly f Turn on power and run an Extended Self Test before installing the rest of the case screws see Extended Self Test on page 2 22 g Remove the battery h Turn the case over and replace the remaining 9 Torx T15 screws in their holes and tighten snugly Restore the customer s configuration If you have not already done so enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 Removal and Replacement 5 Replacement Parts Overview This chapter provides the part numbers for all replace
102. e fff ggg t ccc ddd eeee fff ggg Note When recording test results separate results within a test by commas separate tests by a semicolon and use no empty spaces For example V p F p X p U p E 1000 1000 20 20 50 2000 p P 31 198 DA 198 13000 195 48 DB 198 2545 200 50 D p S 125 150 C 10 40 40 10 40 B 90 150 2500 90 250 M4735A Service Manual 2 7 Test Equipment Test Equipment Table 2 2 lists the equipment needed to perform the Performance Verification tests and provides specifications for commercially available analyzers and simulators Test equipment is called out within each test procedure when needed In addition a digital voltmeter is also useful A 50 ohm test load is available from Agilent Technologies M1781A Table 2 2 Equipment List Equipment Test Specifications ECG Simulator Calibrated Leads ECG simulator Amplitude accuracy 2 Rate accuracy 2 Calibrated Paddles ECG simulator Amplitude accuracy 2 Rate accuracy 2 Defibrillator Analyzer Waveform compatibility Meets all specs below using biphasic truncated exponential waveform Load resistance 50 Q 1 non inductive Maximum energy 2 200 joules Maximum voltage 2 2500 V Maximum current 250 A Measurement accuracy gt 20 joules lt 2 of reading e lt 20 joules lt 0 4 joules Cardioversion measurement range 150 to 150 ms 2 8 Performance Verification and Saf
103. e see ECG Connector on page 4 60 11 SpO PCA if present and flex circuit see SpO2 PCA on page 4 58 The flex circuit will be reused 12 Parameter PCA see Parameter PCA on page 4 56 13 Speaker and mounting hardware see Speaker on page 4 64 New parts to be installed provided with top case The Replacement Top Case Assembly comes with the following new compo nents which must be installed in the field Do not reuse the old gaskets or retaining clips e ECG SpO connector gaskets not available separately see ECG Connector on page 4 60 and SpO2 Connector on page 4 62 e ECG SpO connector retaining clips M2475 07101 see ECG Con nector on page 4 60 and SpO2 Connector on page 4 62 e Short hex standoffs see Keyscan PCA on page 4 42 Removal and Replacement Internal Assemblies Top Case New parts to be installed must be ordered separately In addition the following parts cannot be reused from the old case and must be ordered separately and installed into the new top case e Pacer Keypad if Pacing option is installed see Pacer Keypad on page 4 70 This is available in all the supported languages See Table 5 7 on page 5 11 to select the correct language e Blank Pacer cover if Pacing option is not installed e Instruction Label Set These are available in 2 versions pacing no pacing and in all the supported languages See Table 5 11 on page 5 14 and Table 5 12 on
104. e configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal and replacement The Top Case is probably the most difficult and time consuming repair that can be done on the M4735A e Several existing parts need to be moved from the old case to the new e Several new parts must be installed e some come with the top case e some must be ordered separately M4735A Service Manual 4 75 Internal Assemblies Top Case 4 76 Parts to be moved from old top case to new The following subassemblies must be removed from the old top case and installed into the new one Follow the Removal and Replacement instructions in this chapter for each subassembly Remove them in the order shown and replace them in reverse order 1 Printer see Printer Assembly on page 4 6 2 Paddle Holders see Paddle Holders on page 4 18 3 Control PCA see Control PCA on page 4 36 4 Shield Plate see Shield Plate on page 4 40 5 IrDA break off PCA see Keyscan PCA on page 4 42 6 Keyscan PCA see Keyscan PCA on page 4 42 7 Bezel Assembly with Energy Select switch and Display attached see Bezel Assembly on page 4 48 8 AC Mains Connector and ECG Out Connector see AC Mains Connec tor on page 4 66 9 SpO connector and flex circuit if present see SpO2 Connector on page 4 62 10 ECG connector and cable with ferrit
105. e g 60 bpm 2 Setup the M4735A Set the defibrillator to Manual Mode and press C 3 Check Cardioversion a Verify that sync markers appear on the display at the peak or on the falling side of the QRS complex Adjust the size of the displayed ECG as needed to view it more clearly b Select an energy of 5 J Press CHARGE then press and hold SHOCK until the shock is delivered at next QRS c Verify on the defibrillator analyzer that the shock was delivered and was 5J 2J d Ifthe unit is configured to do so verify that it prints a strip with the correct information on it waveform text e Verify on the defibrillator analyzer that the delay between the peak of the QRS and the delivered shock was 60 msec Sp05 Functional Check This check only needs to be performed if SpO is installed 1 Connect the sensor Attach the SpO transducer to your finger and connect it to the M4735A Check SpO a Activate Manual Mode and press the SpO softkey to turn SpO on b The SpO value displayed should be in the range of 95 100 If the value is less than 95 check that your finger is fully inserted into the sensor and properly positioned Performance Verification and Safety Tests Diagnostic Tests Performance Verification The M4735A includes an extensive set of Diagnostic Tests which test the major hardware components of the defibrillator The Diagnostic Tests include Test System Log Extended Self Test User Int
106. e residue by rubbing the dry surface with your finger and rolling up the adhesive residue Solvents are ineffective as is scraping with a tool b Clean the surface with isopropyl alcohol Allow it to dry 2 Peel off the backing Peel the backing off the new label Avoid touching the label adhesive 3 Apply the label a Align one edge of the label with the recess on the case then roll the label down slowly into position b Press firmly all over the label especially the edges to ensure it adheres to the case After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 4 23 Opening the Case Aui a hwWoncpo o o xoooK Opening the Case To open the sealed case safely perform the following steps in the order listed 1 Discharge the Power Supply Capacitors page 4 24 2 Separate the Case page 4 26 3 Discharge the Defibrillator Capacitor page 4 30 Each step is described in more detail in the sections that follow Discharge the Power Supply Capacitors There are 2 methods of discharging the unit s power supply capacitors Always use the Primary Method first as it will work in most cases If there are any doubts the Secondary Method should also be used CAUTION Always discharge the power supply capacitors before servicing the M4735A Primary Method 1 Disconnect the AC power and remove the battery 2 Turn on the unit s power
107. ecord as dd Peak Current Ignore Derived from same measurements as delivered energy and impedance Defib Errors Not recorded failure if any reported Shock Counter Disregard M4735A Service Manual 2 35 Performance Verification 2 36 Defibrillator Test Battery Power At 200 J These instructions describe how to test the defibrillation function when pow ered only by a fully charged battery with no AC power connected If all results are as described the unit passes the test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin trou bleshooting and repairing the unit as needed See Troubleshooting on page 3 1 and Table 3 9 Operational Problems Defibrillation and Synchro nized Cardioversion on page 3 21 1 Set up the test a Turn the defibrillator off Insert the battery and disconnect the AC Power cord b Connect the defibrillator analyzer to the pads cable Set the analyzer to measure delivered energy If needed reset the analyzer s display to read 0 c Turn the defibrillator on and from the Diagnostic Menu Select the Defib Meas Test and press ENTER 2 Deliver a 200J shock a Use the Energy Select control to select 200J b Press the CHARGE softkey to charge the defibrillator c Press SHOCK 3 Check the analyzer readings Read the delivered energy indicated by the defibrillator analyzer It should be 200J 415 30J Record as aaa 4 Check the values
108. ect paddles Defib Disarmed The defib is disarmed and no energy is available due to one of the following The pads connection is compromised The mode is changed from Manual to AED while the defibrillator is charged SHOCK is not pressed within 30 sec onds of the defibrillator being charged e DISARM is pressed Check the pads are applied to the patient properly If a shock is indicated deliver the shock before changing modes e To deliver a shock press SHOCK within 30 seconds of the defibrillator being charged None No Shock Delivered Patient impedance is too high or too low 1 Make sure pads are applied properly 2 Replace the pads 3 Replace the pads cable Check Printer Printer paper is absent or jammed the printer door is not closed properly 1 Reload printer paper 2 Make sure the door is closed properly Data Card Full 3 14 No data is being recorded on the Data Card due to one of the following The incident is more than 2 hours in duration causing the Data Card to fill None A new Data Card can not be inserted during an incident Troubleshooting General Problems Message Possible Cause An empty Data Card was not inserted for the incident the Data Card filled sooner Corrective Action Use one empty Data Card per incident patient to decrease the chance of the card filling Data Card Interrupted No da
109. ee Troubleshooting on page 3 1 and Table 3 6 on page 3 17 Data Card Disabled The PC card is not in use because itis full If possible turn the M4735A off for more incompatible absent removed during the than 2 minutes then insert a new empty incident or inserted after the M4735A was M3510A Data Card and turn the device turned on on ECG Fault The ECG data acquisition system failed Service the unit See Troubleshooting and data is unavailable from the 3 or 5 lead monitoring electrodes on page 3 1 and Table 3 7 on page 3 18 Monitor Failure Cycle Power An error has occurred in the monitoring subsystem Turn power off then on If message reap pears service the unit See Trouble shooting on page 3 1 Low Battery The battery has sufficient capacity remain ing to provide only about ten minutes of monitoring time and six shocks before the M4735A shuts off Replace the battery with a fully charged M3516A battery Leads Off The monitoring electrodes are not applied Check that the monitoring electrodes are or are not making proper contact with the properly applied patient The ECG cable is not connected Check that the ECG cable is properly con nected The internal cable from the ECG connec Check the internal cable tor to the Parameter PCA is disconnected Failure on the Parameter PCA Replace the Parameter PCA No Pads The multifunction defibrillation electrode Check the pads
110. een SpO PCA and Parameter PCA See Servicing Notes on page 4 1 Replace SpOs PCA Replace Control PCA Replace Parameter PCA Reads obviously wrong value Same as above Same as above Noisy intermittent signal Same as above Same as above 3 20 Troubleshooting Operational Problems Defibrillation and Cardioversion The following table covers problems that might arise while defibrillating or delivering synchronized cardioversion NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 9 Operational Problems Defibrillation and Synchronized Cardioversion Message or Symptom Won t charge in Manual Mode Possible Causes Pads connector or internal wiring failure Power PCA failure Control PCA failure Parameter PCA failure e CHARGE key failure Suggested solution Diagnose as follows 1 Try AED Mode Charges OK Go to step 3 e Still not charge Go to step 2 2 Verify Pads Off and Cable Off detection by unplugging pads cable Detects both OK Go to step 3 Either Pads Off or Cable Off fail replace 1 Pads connector 2 Power PCA 3 In Diagnostic Mode run Controls Test and test CHARGE key Key tests OK Replace Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA Won t charge in AED Mo
111. electrodes and defibrillator pads for freshness data code or expiration date and condition Pass Electrodes and pads are within their expiration date and appear usable Packaging is unopened and shows no tears or punctures No corrosion visible on connector sockets electrodes or pads M4735A Service Manual 2 15 Performance Verification Functional Checks The following functional checks exercise the basic functions of the defibrilla tor monitor They are intended as a broad check of the unit s performance and are designed to complement not replace the Diagnostic Tests described later If all elements of a test pass record that test as a PASS and return to the main diagnostic menu by pressing MAIN If there is any failure begin trouble shooting and repairing as needed See Troubleshooting on page 3 1 The Functional Checks include Check Page ECG Functional Checks 2 16 Shock Advisory Functional Check 2 17 Synchronized Cardioversion Functional 2 18 Check Sp02 Functional Check 2 18 ECG Functional Checks This section describes how to check the operation of the ECG functions Each of the ECG checks assumes the unit and the simulator are still set up as they were at the end of the previous ECG check To check ECG display and Heart Rate HR functions 1 Setup the simulator a Connect the ECG simulator to both the Pads input and the 3 or 5 lead ECG cable b Setthe simulator for normal sinus rhythm NSR 1
112. en slide the flex circuit into place and push the top down to latch it Route the flex circuits as they originally were with 2 above and 2 below the Keyscan PCA NOTE If the Pacing option is not installed there will be only 2 flex circuits f 4 46 Connect the large ribbon cable keeping its orientation and bending as they were originally Removal and Replacement Internal Assemblies Top Case After Repair After the repair is complete perform the following steps 1 M4735A Service Manual Replace the Shield Plate See Shield Plate on page 4 40 Replace and reconnect the Control PCA See Control PCA on page 4 36 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 47 Internal Assemblies Top Case Bezel Assembly The following sections describe how to remove and replace the Bezel Assem bly The Bezel Assembly comes from the factory with the Main keypad and its rubber overlay preinstalled The keypad and overlay are not available sep arately if the rubber or keypad are damaged the entire Bezel Assembly must be replaced The Bezel Assembly is available in all
113. er Module in the bottom case If it is not disconnect it now See Opening the Case on page 4 24 b Using a flat bladed screwdriver press in on the locking tabs on the top of the AC Mains Connector to release the top edge from the case The tabs will be difficult to depress c Reach under the AC Mains Connector with your fingers and press in on the locking tab to release the connector from the case d Remove the AC Mains Connector along with the ECG Out Connec tor and the attached cables 4 66 Removal and Replacement Internal Assemblies Top Case Figure 4 34 Removing the AC Mains and ECG Out Connectors AC Mains Cable to ECG Out Sync Connector Parameter PCA Connector Replacement 1 Replace the AC Mains Connector a Feed the ECG Out Connector and the attached cables through the hole in the case first then insert the AC Mains connector into the hole last b Press the AC Mains connector into place Be sure all the latches snap into place It should be oriented as shown in Figure 4 34 with the ground lug green wire toward the top of the case M4735A Service Manual 4 67 Internal Assemblies Top Case 2 Replace the ECG Out Sync Connector a Replace the ECG Out Connector in its hole in the case Align one of the flat sides against the ribs in the case NOTE One corner of the ECG Out connector is rounded Keep that away from the ribs so the ribs can prevent the connector from rotating in either direc
114. erface Tests ECG Tests Pacing Test Defibrillator Test AC Power At 200 J Defibrillator Test Battery Power At 200 J Defibrillator Disarm Test M4735A Service Manual Page 2 20 2 22 2 25 2 29 2 33 2 35 2 36 2 38 2 19 Performance Verification 2 20 System Log The System Log includes the unit s serial number hardware configuration and a listing of error codes The System Log should be printed each time a Performance Verification Test is run 1 Enter Diagnostic Mode See Diagnostic Mode on page 2 11 Print the System Log a Select Print Log and press ENTER b The printer will print the System Log strip See Sample System Log Printout on page 2 21 Check the System Log a Check hardware and options Check the printout to verify the printed results are consistent with the hardware in place Check options installed SpO pacing and the unit s serial number on the bottom of the case If the printout is not correct investigate and resolve the source of the mismatch Then reset the hardware options and serial number as needed using the Support Software Tool See The Software Support Tool on page 2 12 Check for M4735A errors If there are device errors reported in the System Log Check the time and date stamps to see if they are recent errors or not Consult Table 3 2 Error Codes on page 3 10 to identify the errors Begin troubleshooting as needed See Troublesh
115. etect Pads Off and Paddles Off and to light the Patient Contact Indicator LEDs on PCI equipped paddle sets It is an approximate measurement only the impedance value used to adjust the defibrillation waveform is a separate measurement made during delivery of the shock See Theory of Operation beginning on page 6 1 for more details a b Connect a set of external paddles to the M4735A If the PCI setting is On turn it Off now by pressing the Volume Up and Down arrow keys simultaneously See Figure 2 1 on page 2 11 Remove the paddles from their holders and hold them firmly together face to face metal to metal Be sure the paddles clean and are mak ing good contact with one another Turn the PCI setting On by pressing the Volume Up and Down arrow keys simultaneously See Figure 2 1 on page 2 11 The displayed PCI value should now read 0 Place the paddles back in their holders Be sure the metal contact clip in the holder is clean and makes good contact with the face of the paddle The PCI measurement should now read 50 ohms 30 ohms Record this as ee Remove the paddles from the holders and hold them apart The PCI measurement should read gt 1250 ohms full scale Record this as ffff Performance Verification and Safety Tests M4735A Service Manual Performance Verification Pacing Test These instructions describe how to test the pacing function This test only needs to be run if the Pacing option
116. eter PCA Replace Parameter PCA Sp02 Failure on SpOz PCA Replace SpO PCA Failure on Control PCA Replace Control PCA M4735A Service Manual Operational Problems Operational Problems These tables describe problems that may arise with specific functions or oper ations while using the M4735A ECG Monitoring The following table covers problems that might arise while monitoring ECG NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 7 Operational Problems ECG Monitoring Pads or Leads Symptom Noisy trace constant noise on the baseline Possible Cause Incorrect configuration power line frequency 50 or 60 Hz or Filter set tings Nearby source of constant interfer ence Failure in ECG front end Failure in signal processing circuits Suggested Solution Check change configuration as needed Try moving cable leads try relocat ing unit Pads Replace Power PCA Leads Replace Parameter PCA Replace Control PCA Noisy trace intermittent bursts of noise or random spikes Noisy trace low frequency peri odic Nearby source of time varying inter ference such as radio transmitter paging walkie talkies or X Ray system Failure in ECG front end Failure in signal processing circuits More than one instrument con nected to the patient an
117. ety Tests M4735A Service Manual Table 2 2 Equipment List Test Equipment Equipment Test Pacer tester Load impedance Current measurement accuracy 30 mA 50 mA 50 mA 200 mA Rate measurement accuracy 40 180 ppm Waveform duration accuracy 40 180 ppm Specifications 400 Q t2 mA t496 lt t0 5 1ims 2 9 Configuration and Diagnostic Modes Configuration and Diagnostic Modes The instructions below describe how to enter Configuration Mode and Diag nostic Mode Configuration Mode These instructions describe briefly how to use Configuration Mode See the User s Guide for details on configuration settings and what effect they have 1 Power off Make sure the unit s power is off Insert a Data Card If you intend to save the configuration to a Data Card or load the config uration from a Data Card insert the Data Card now NOTE To avoid possible confusion designate one Data Card as the Configuration Card and label it clearly Keep this card physically separate from cards used by the clinical staff for data storage Enter Configuration Mode Press softkeys 4 and 5 at the same time and hold them down while turn ing the power on See Figure 2 1 for softkey numbering Select and manage Configuration choices e To select a configuration press the A and W softkeys to move up or down the list until the desired Settings item is highl
118. evice This Service Man ual assumes you are familiar with the controls and with basic operations Defibrillator Monitor The M4735A is a biphasic semi automatic external defibrillator This porta ble lightweight device offers two modes of operation for defibrillation e Semi Automatic External Defibrillation AED Mode e Manual Mode In AED Mode the M4735A analyzes the patient s ECG and advises the clini cian whether or not to deliver a shock Defibrillation is performed through multifunction defib electrode pads In Manual Mode the M4735A turns control of the defibrillation process over to the clinician The clinician analyzes the patient s ECG decides if defibrilla tion is advised and determines the energy setting for defibrillation Defibrilla tion is performed either through multifunction defib electrode pads or through paddles Manual Mode also allows the clinician to perform synchronized cardioversion and offers optional noninvasive pacing using a monophasic waveform ECG monitoring can be accomplished in either mode using one of 3 methods e ECG from the defib pads e 3 lead ECG using separate monitoring electrodes e Optional 5 lead ECG using separate monitoring electrodes Optional pulse oximetry SpO monitoring is available in both modes as well The M4735A automatically stores critical events such as shocks and alarm violations in its internal memory An Event Summary may be printed at any time The M4735A
119. ezel Lockwasher Nut Energy Select Knob 4 52 Removal and Replacement Internal Assemblies Top Case Replacement Replace and reconnect the Energy Select Switch a Insert the Energy Select switch into the hole in the Bezel Orient it as shown in Figure 4 27 b Fitthe switch into place between the square ribs on the Bezel Be sure the switch is fully bottomed against the Bezel c Replace the lockwasher and nut on the shaft Tighten the nut securely d Plug the connector into the Keyscan PCA Be sure it latches After Repair After this repair is complete perform the following steps 1 Replace the Energy Select Knob Push the knob onto the shaft Be sure the knob is pressed fully into place 2 Reassemble the case See Closing the Case on page 4 99 3 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 4 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 53 Internal Assemblies Top Case 4 54 Display Assembly The following sections describe how to remove and replace the Display Assembly The Display Assembly is mounted to the back of the Front Bezel Preparation 1 Save the configuration If possible save the customer s configuratio
120. ezel Assembly on page 4 48 Replace and reconnect the Keyscan PCA See Keyscan PCA on page 4 42 Replace the shield plate See Shield Plate on page 4 40 Replace and reconnect the Control PCA See Control PCA on page 4 36 Reassemble the case See Closing the Case on page 4 99 Restore the customer s configuration Energy Select Switch Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 55 Internal Assemblies Top Case Parameter PCA The Parameter PCA is located in the top case behind the printer bucket Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after repair 2 Open the case safely See Opening the Case on page 4 24 3 Disconnect and remove the SpO PCA See SpO2 PCA on page 4 58 CAUTION See cautions regarding handling and connection of flex circuits on page 4 1 Removal 1 Disconnect the Parameter PCA 4 cables a Disconnect the large ribbon cable by pulling straight up connects to the Control PCA b Disconnect the small 3 pin connector next to the ribbon cable con nects to the ECG Out Connector Pres
121. ff Pacer Pacer Start Stop Pacer Rate Pacer Current Pacer Mode ECG Gain Volume Strip Summary Mark Indicators EL display for ECG waveform and text prompts Audio alerts QRS Beeper Charging Tones for sync and asynchronous modes AC Power LED Battery Charging LED Sync LED Pacer LED Armed Indicators Charge done tone and available energy indicated on dis play Energy Selection Front panel rotary knob Charge Control Front Panel 2 key or buttons on paddles Shock Control Front Panel 3 key or buttons on paddles Synchronizer SYNC message appears on the monitor and is annotated on the printer if printing while in Sync Mode An audible beep sounds with each detected R wave while a tick mark on the monitor and printed strip indi cate the discharge points Synchronizer delay is less than 60 msec from peak R wave to peak current of the defibrillation discharge 7 2 Specifications M4735A Service Manual Specifications AED Mode AED Energy Profile Fixed Energy 150 Joules AED Shock Series 2 3 or 4 shocks per series Shock Series Timer off 30 60 90 120 150 180 or 210 seconds Text and Voice Prompts Extensive text and audible messages guide user through protocol AED Controls On Off Pause Resume Analyze Stop Analysis Shock Lead Select SPO On Off SpO Alarms HR Alarms ECG Gain Volume Strip Summary Mark Indicators EL display for ECG waveform and text prompts Audio alerts Voice
122. functions esseseesseseessesrtssreeresesstsetestesstterestesstsetestesseestesreeseesesreesee 6 7 SpO2 Monitoring Functions Re Ht 6 8 Defibrillatonm FUNCHONS uso exec senden quotus usu DONE RO en eor Ra ise EEEE Ida CUR pP ES TEE EEES 6 9 Paco FU CHODS sisiane art DO tuta de bf aces A nitent dre tue ases uq ds 6 11 POUL FUNCIONS osetia casera eee sep sted QU ceo aei n tibias subo Dc iru ub item dale PE Mi 6 11 ICE districte Me cc 6 11 hiteransrerdiitii etes M 6 11 Rey Ene oS srengen aiee utudduat emu deiude utut du n ed uUi 6 11 Energy e dice id ru P 6 12 Printins FUNCIONS 5i coperti En E E E pie E diss bm dc Mu ed eui ESA 6 12 Bauer Power BUHOHOS cuenpseeidokem evum and n Io earner dm OMS dus d 6 12 Lithium Backup Battery Pm 6 15 DEIER OTe E E EE 6 15 Specifications au F 7 1 SDOCITIGAU HS uscito cr i E EEEE Uu Dra uuo Ob p eer ER RO ue PER albu 7 1 B23 610 00 12160 HD ee Neeson eer 7 1 ECG Monitoring T T 7 3 Display A 7 4 Banery GMT cep pcm 7 4 Thermal Array Printer ER RR 7 5 Noninvasive wee lU MSRP R 7 6 SpO Pulse OXIME qe eaeerre reece 7 6 Event Stor ge P aeie aE 7 6 G neral acs O 7 7 Enyironmental sc ciieasas
123. g and Repair Methodology Troubleshooting and Repair Methodology We recommend you follow the methodology described below to isolate and repair problems with the M4735A Section Page Methodology Overview 3 2 Initial Assessment 3 3 Diagnosing External Failures 3 4 Diagnosing Internal Failures 23 5 Methodology Overview Interview the User If possible talk directly with the user who reported the problem Identify what they were doing when the problem occurred and exactly what hap pened What was on the display What tones or voice prompts were heard Were there operational problems Identify the Problem First evaluate the unit s condition using the steps in Initial Assessment on page 3 3 Then use Diagnosing External Failures on page 3 4 to identify problems that can be resolved without further troubleshooting Finally if needed use Diagnosing Internal Failures on page 3 5 to isolate the problem to a particular subassembly If no trouble is found proceed to the Performance Verification and Safety Tests chapter for instructions on tests to run Perform the Repair Follow the procedures in the Removal and Replacement chapter to replace any defective subassemblies When the repair is complete it is good practice to check the repair by attempt ing to reproduce the specific problem found It is also advisable to print the System Log again to check that no errors have been logged after the repair Test the Unit Use t
124. he Battery Eject Spring Correct orientation is when the spring is angled slightly toward the Battery PCA and NOT angled up out of the battery compartment Adjust the angle of the spring as needed by turning it while keeping it in place in its slot 2 Insert a battery to compress the springs and position the PCA a Slide a battery into the battery compartment Be sure the battery stays flat and does not push up out of position b Asthe battery latches into place it will push the Battery PCA into position and compress both the Battery Eject Spring and the Battery PCA Spring 3 Replace the Battery Cover a While keeping the battery in place replace the battery cover starting with the end by the battery PCA See Figure 4 4 b Insert the tab on the cover into the mating slot next to the battery spring Then lower the cover into position allowing the square post on the cover to mate with the recess in the case c Replace all 7 screws and tighten Figure 4 4 Installing the Battery Cover Tab on Cover Square Post on Cover After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 M4735A Service Manual 4 11 External Assemblies Main Fuse The main fuse is located on the Battery PCA which is under the Battery Cover Removal 1 Remove the Battery Cover See Battery Cover on page 4 10 2 Remove the fuse a Pullout the Battery PC
125. he capacitor and as the voltage bleeds down it directs the Power PCA to top up the charge to the correct level Should a decision be made to change the selected energy to a lower value the user would turn the Energy Select Switch to the desired setting At the lower energy setting the Control PCA directs the Power PCA to disarm completely discharge the capacitor then charge up to the new lower level If the requested charge is not used within 30 seconds the Control PCA automatically directs the Power PCA to disarm the capacitor as a safety precaution Delivering a shock The discharging cycle delivering a shock is initiated by either of two events e The first is by pressing the front panel key 3 SHOCK when using pads This keypress is transferred from the key to the Keyscan PCA via a flex circuit The Keyscan PCA transfers the keypress to the Con trol PCA via a large ribbon cable The keypress is then detected and processed by the Control PCA M4735A Service Manual 6 9 System Functional Descriptions e The second means of initiating a shock is by simultaneously pressing the SHOCK switches on both the Sternum and Apex paddles These keypresses are transferred from the keys to the Power PCA via the paddles cable The Power PCA transfers the keypress to the Control PCA via a large ribbon cable The keypress is then detected and pro cessed by the Control PCA In either case the Control PCA directs the Power PCA to deliver t
126. he case and lay it component side up on a static safe surface 3 Remove the3 individual wires a Pullstraight up with a needle nose pliers to disconnect the 2 paddles wires Their other ends have already been disconnected from the pad dles pockets TIP Wiggling the spade connectors will help but use care to not bend the PCA mounted connections b Pullstraight up with a needle nose pliers to disconnect the one remaining wire Its other end has already been disconnected from the Power PCA Figure 4 24 Keyscan PCA Screws PCA Mates with Ribs in 3 urne n arr Keypad Flex Circuits IrDA PCA Display Cables Routed Through Hole in PCA Keyscan PCA Speaker Energy Select Switch 4 44 00 Removal and Replacement Internal Assemblies Top Case 4 Unscrew and remove the IrDA break off PCA OPTIONAL If the Keyscan PCA is being replaced also remove the IrDA PCA A replacement IrDA PCA is provided with the replacement Keyscan PCA If the Keyscan PCA is being removed for access to other subassemblies skip this step a Remove the 2 T10 screws that attach the IrDA PCA to the case See Figure 4 25 on page 4 45 b Remove the PCA c Disconnect the cable from the PCA Press on the connector latch to release it Its other end has already been disconnected from the Key scan PCA Figure 4 25 Removing the IrDA PCA Cable to Keyscan PCA IrDA PCA M4735A Service Manual 4 45 Internal Assemblie
127. he customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 5 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 35 Internal Assemblies Top Case Control PCA The steps below describe how to remove and replace the Control PCA The Control PCA contains the unit s operating software including the data for the voice prompts The Control PCA is therefore localized into all the supported languages See Table 5 2 on page 5 7 for part numbers Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the Control PCA 5 cables a 4 36 Disconnect the large ribbon cable on the left side of the Control PCA connects to the Power PCA See Figure 4 20 on page 4 37 Disconnect the smaller ribbon cable on the left side of the Control PCA connects to the Parameter PCA Disconnect the small ribbon cable at the rear of the PCA connects to the printer This requires releasing latches on the ends of connector push the latches out and down to release them Disconnec
128. he procedures found in the Performance Verification and Safety Tests chapter to verify that the unit is operating properly overall Be sure the testing performed is appropriate for the level of repair 3 2 Troubleshooting Initial Assessment Initial Assessment Use the following steps to begin isolating the problem Attempt Power Up Assess the unit s overall condition by performing the following steps 1 2 3 Evaluate the Response The unit will respond in one of the following 3 ways No response Disconnect the AC Power cord if connected Insert a fully charged battery into the unit If the unit is used with a Data Card insert a new empty M3510A Data Card into the unit Attempt to power up the unit by turning the Energy Select Switch to either Manual On or AED ON IF The unit emits no sounds and no changes are visible on the display THEN Troubleshoot further using Table 3 1 on page 3 8 Unit Unresponsive Minimal response IF Unit provides only a slight response such as a click or chirp from the speaker or a change in the brightness or the borders of the display THEN Replace the Control PCA see Removal and Replacement on page 4 1 Return to this section and begin again with Attempt Power Up Powers Up IF The unit can generate tones or voice prompts or display text M4735A Service Manual or graphics or respond to keypresses THEN Proceed to Diagnosing External Failures on page 3
129. he shock Patient resistance is derived from the current and voltage delivered during the initial portions of the waveform and the biphasic waveform is then adjusted as needed to deliver the correct energy The Power PCA will abort delivery of the shock if any of the following occurs e During the impedance measurement the impedance is outside of operating limits too high or too low e Atany time during delivery of the shock it detects an open circuit voltage too high for that point in the waveform or a short circuit current too high for that point in the waveform Should any of these conditions be detected the Power PCA terminates delivery of the waveform and disarms the capacitor The problem is reported to the Control PCA which displays and or prints the appropriate messages Another safety feature is the presence of an identification resistor in the pads and paddles cables If the unit does not sense that resistance it gives a Cable Off message and will not charge the capacitor Delivering synchronized cardioversion Synchronized cardioversion operates the same as delivering a shock except that the shock must be synchronized to the R wave of the ECG The Control PCA is responsible for detecting the R wave and placing markers on the printed strip and on the display to indicate the timing of the proposed cardioversion shock A synchronized shock can be delivered in either of two ways e First when using pads by pressing
130. healthcare agilent com mpg reginfo conformity html Specifications A AC Power Module See Power Module Accessories 5 1 5 18 ordering 7 16 AED Mode 1 1 3 21 7 3 Amplifier test 2 30 Attach Pads 3 14 Audio tone 6 11 operational problems 3 27 speaker removal and replacement 4 64 testing 2 26 troubleshooting 3 16 C Battery 6 4 6 12 Battery Capacity Test 2 40 Battery Charger Adapter 1 3 5 20 Battery Eject Assembly 5 12 charging 1 2 3 21 cover replacement 4 10 disposal 4 3 Lithium Backup Battery 4 34 5 7 5 0 6 15 Low Battery 3 12 operational problems 3 29 PCA 4 80 5 8 5 21 6 4 repair philosophy 1 3 specifications 7 4 testing 2 6 2 36 Bottom case assembly 5 12 Branding label set 5 17 Cable pads cables 5 19 5 24 placement 4 2 printer 4 62 SpO2 adapter 5 19 tie wrap 5 13 Index Capacitor defibrillator 4 30 4 84 5 8 5 22 power supply 4 24 Carrying case bottom case assembly 5 12 closing 4 99 discharging capacitors 4 24 4 30 separating 4 26 top case assembly 4 75 4 97 5 12 Case label set 4 20 4 77 4 08 Check Printer 3 14 CODEC test 2 23 Configuration Lost 3 12 Configuration Mode 2 10 3 4 3 5 Connector 5 12 5 23 ECG 4 60 Patient 4 94 retainer clip 5 13 Control PCA 6 2 replacement 4 36 5 7 5 21 Software Support Tool 2 12 Index D Defibrillator 1 1 Disarm Pathway 4 30 Data Card 3 4 6 15 AC power test 2 6 2 Display Data Card Disabled 3 35 operatio
131. ication Testing as described in Performance Verification and Safety Tests starting on page 2 1 Removal and Replacement Closing the Case Closing the Case To close the case 1 Recheck connections Recheck connections to all PCAs Be sure all connectors are fully seated and latched 2 Make the unit ready for assembly a Make sure the Data Card ejector button is pressed in fully b Orientthe unit flat on a smooth surface so that the handle is closest to you with the bottom case on the left next to the top case See Figure 4 17 on page 4 29 c Pivotthe top case to a vertical position as shown in Figure 4 16 3 Connect the case halves a Connect the large ribbon cable from the Power PCA to the Control PCA b Connect the single wire from the Keyscan PCA to the Power PCA Push straight down with needle nose pliers c Connectthe AC input to the AC Power Module by pushing the con nector straight into the Module 4 Mate the case halves a Hlip the top case over to the left into a rightside up position over the bottom case b Lower the top case straight down with the front edge first to give extra room for the ejector button c Mate top to bottom 5 Check the unit a Carefully check around all mating edges of the case for any gasket wires etc sticking out between the case halves b Turn the case upside down holding the halves together with your hands and shake it to double check for loose har
132. ighted Then press the ENTER softkey to access those settings e To print out a strip with all the current configuration choices select Print All Settings and press ENTER e To store the configuration settings on a data card select Save Settings to Data Card and press ENTER When prompted with Save Settings to Data Card press SAVE e To load configuration settings from a Data Card select Load Settings from Data Card and press ENTER When prompted with Load Settings from Data Card press LOAD Exit Configuration Mode To exit Configuration Mode turn the unit off Remove the Data Card Performance Verification and Safety Tests M4735A Service Manual Configuration and Diagnostic Modes Figure 2 1 Softkey Numbers Softkeys 4 5 6 7 Diagnostic Mode These instructions describe how to enter Diagnostic Mode Once in Diagnos tic Mode you can do the following e Print the System Log See System Log on page 2 20 e Run the Extended Self Test See Extended Self Test on page 2 22 e Run other Diagnostic Tests See Diagnostic Tests on page 2 19 1 Power off Make sure the unit s power is off 2 Enter Diagnostic Mode Press softkeys 4 and 6 at the same time and hold them down while turn ing the power on See Figure 2 1 for softkey numbering 3 Waitfor the unit to initialize This may take several seconds The unit is ready to proceed when the screen cursor responds to softkey inputs 4 Select
133. iguration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 3 Disconnect and remove the Control PCA See Control PCA on page 4 36 4 Remove the Shield Plate See Shield Plate on page 4 40 Removal 1 Disconnect the Keyscan PCA 12 cables TIP Position the M4735A with its handle hanging off the edge of your work surface See Figure 4 23 Remove the large ribbon cable See Figure 4 23 on page 4 43 Its other end has already been disconnected from the Control PCA Note the position and location of the bend in the ribbon cable Disconnect the 4 keypad flex circuits Unlatch the white receptacles on the PCA by pulling upward on the top of the receptacle then slide out the flex circuit Note that 2 flex circuits to the Pacing Keypad are routed around the top edge of the Keyscan PCA and 2 flex circuits to the Main Keypad are routed around the lower edge of the Keyscan PCA NOTE If the Pacing option is not installed there will be only 2 flex circuits 4 42 Disconnect the IrDA break off PCA Press on the connector latch to release it Disconnect the Energy Select Switch Press on the connector latch to release it Disconnect the 2 display ribbon cables The larger ribbon connector has latches on the ends of the connector press them out and down to release the connector The smaller c
134. igure 4 14 Battery Connector Location AC Power Module Battery Connector Power PCA Cable from Battery PCA M4735A Service Manual 4 25 Opening the Case Separate the Case WARNING Dangerous voltages may be present on components and connections exposed during 2 unit disassembly Use extreme caution while the unit cover is removed CAUTION Be sure to work in a static free environment Use an electrostatic wrist band The work surface and area surrounding it must be static free Use an antistatic pad which is grounded per the manufacturer s instructions 1 Eject the Data Card Remove the Data Card by pushing its Eject button and pulling the card out CAUTION Be sure the Eject button is fully in if it is left partially extended it can catch on the bottom case and break off 2 Remove the paddles Disconnect the paddles from the Patient Connector Snap both paddles out of their retainers and lay them aside 3 Turn the unit over Turn the M4735A upside down display facing down with the handle closest to you 4 Remove the Battery Cover See Battery Cover on page 4 10 5 Remove the case screws a Loosen 4 T15 screws from the bottom of the case See Figure 4 15 Do not remove the 2 screws that attach the AC Power Module to the case b Loosen 6 T15 screws from the handle Leave the two halves of the case together c Turnthe unit over so the display is fac
135. ing up Keep the handle closest to you The case screws will fall out of their holes as you do this TIP To avoid losing any screws apply tape over the screw holes before turning the case rightside up 4 26 Removal and Replacement Opening the Case Figure 4 15 Removing the Case Screws 6 Open the case a Start opening the case at the back edge to break any adhesion along the gasket b Pull the back of the top case up slightly c Thenpull up the front of the top case while sliding it rearward to give the Eject button more room to clear the bottom case M4735A Service Manual 4 27 Opening the Case 7 Pivot the top case to a vertical position a Once the case halves are separated pivot the top case to the right as shown in Figure 4 16 b Stop when the top case is resting on its edge next to the bottom case CAUTION Do not proceed with the next step until you are sure the power supply capaci tors have been discharged 8 Disconnect the case halves a Disconnect the large ribbon cable from the Power PCA connects to Control PCA b Disconnect the single wire from the Power PCA by pulling straight up with needle nose pliers connects to Keyscan PCA c Disconnect the AC input from the AC Power Module by compressing the 2 latches on the connector pulling the connector straight out from the Module Figure 4 16 Case Opened to Vertical AC Input to AC Power Module Ribbon Cable to Cont
136. iptions For each major system function a description of how the signal is routed through the various PCAs In these descriptions reference will be made to PCAs or features which are optional and may not be present in the unit you have In that case simply ignore those sections The remaining PCA and Functional descriptions will still apply 6 1 6 29 00 PCA Descriptions 6 2 PCA Descriptions The sections following provide descriptions of the functions handled by each PCA Control PCA The Control PCA performs the following functions System level processing System level control and clock functions including a Control of power up and power down sequences b Storage of configuration selections made by the user c Storage of operating software including data for generating display formats and graphics Main interconnection site between the other PCAs User interface functions including a Generation and control of tones and audio prompts b Generation and formatting of real time information for the display and for the printer c Control of printer functions d Control of indicator LEDs for Manual Sync and Pacer keys Control of data to and from the Data Card Control of defibrillation functions on the Power PCA including a Initiating a capacitor charge sequence b Monitoring charge on capacitor c Initiating a shock delivery sequence Control of pacing functions on the Power PCA including
137. is subassembly replacement Examples of subassemblies are the printer the Control Printed Circuit Assembly PCA and selected connectors and other items Repairs that involve replacing com ponents on a PCA are not supported CAUTION Individual component replacement should not be attempted outside of a fac tory authorized repair facility Component level repair is extremely difficult due to the extensive use of surface mount technology and the high parts den sity on the circuit boards Unauthorized component replacement can impair performance of the M4735A Batteries The repair philosophy for the SLA battery M3516A is unit replacement These items are not repaired in the field For information on ordering replacements see Supplies amp Accessories on page 5 18 M4735A Service Manual 1 3 Overview This page intentionally left blank 1 4 Introduction 2 Performance Verification and Safety Tests Overview This chapter describes the tests and inspections required to verify perfor mance of the M4735A Portable Defibrillator Monitor Chapter Contents The major sections of this chapter are as follows Section Page Mandatory Testing 2 2 Test Matrix 2 4 Test Equipment 2 8 Configuration and Diagnostic Modes 2 10 The Software Support Tool 2 12 Performance Verification 2 14 2 1 6 29 00 Mandatory Testing 2 2 Mandatory Testing The Performance Verification Tests in this chapter are intended to verify
138. it receives from other parts of the unit This data is then passed to the Printer via the printer ribbon cable Contrast The printing contrast is controlled automatically by the Printer itself The printhead senses its own temperature and impedance and passes that information to the Control PCA The Control PCA adjusts drive voltage to the printhead and thus contrast based on these readings and on battery volt age Out of paper door open The printer also incorporates an optical sensor that detects when there is no paper left or when the printer door is open The information is passed to the Control PCA via the printer ribbon cable the Control PCA generates the appropriate screen message and tones to alert the user Battery Power Functions Refer to Figure 6 3 for the following descriptions Power for charging the battery and running the unit is supplied via the AC Power Module The M4735A uses approximately 400 650 mA of 12 V DC when powered off to maintain configuration settings system clock etc When powered on in Monitoring Mode the unit consumes approximately 500 700 mA Instrument ground is connected to minus of the AC Power Module Contacts Battery Type The battery mates with contacts on the Battery PCA Power from the battery flows through the Main Fuse on the Battery PCA and then through separate wires to the Power PCA for distribution to the rest of the unit The Battery PCA also detects whether the installed
139. l PCA Charges but disarms spontane ously 1 Unit sensed Pads Off or Cable Off due to Pads losing contact with patient Pads failure e Pads cable failure Power PCA failure Control PCA failure Parameter PCA failure 2 DISARM key failure intermittent Replace paddles or pads and pads cable Diagnose further as follows In Diagnostic Mode run Controls Test and test DISARM key Key tests OK Replace 1 Power PCA 2 Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA Charges slowly about 4 5 sec instead of 2 3 sec Battery too old or not fully charged Unit senses unsupported battery due to Unsupported battery in use Battery PCA failure Power PCA failure Control PCA failure Replace with new fully charged bat tery Also run Battery Capacity Test on suspect battery see page 2 40 Use only supported battery M3516A M5516A Diagnose further as follows In Diagnostic Mode start Battery Capacity Test see page 2 40 e Unsupported battery on dis play Stop test Replace 1 Bat tery PCA 2 Power PCA 3 Control PCA No message on display Stop test Replace 1 Power PCA 2 Control PCA 3 22 Troubleshooting Operational Problems Table 3 9 Operational Problems Defibrillation and Synchronized Cardioversion Message or Symptom Won t discharge Possible Causes Control PCA fail
140. ly that holds it into place See Table 5 10 on page 5 13 for part numbers Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 3 Disconnect and remove the Control PCA See Control PCA on page 4 36 Removal Remove the existing battery a Using a pair of fine nose wire cutters cut and remove the cable tie wrap that holds the battery in place See Figure 4 20 and Figure 4 21 for location b Remove the battery from the holder Replacement Install the new Lithium battery a Insert the battery into the holder CAUTION 4 34 Be sure to install the new battery with the correct orientation Follow the polarity markings on the bottom of battery holder under the battery b Secure it in place with a cable tie wrap After Repair After the repair is complete perform the following steps 1 Replace and reconnect the Control PCA See Control PCA on page 4 36 2 Reassemble the case See Closing the Case on page 4 99 3 Restore the system configuration Removal and Replacement Internal Assemblies Top Case Use the Software Support Tool to restore the unit s serial number and to select whether SpO hardware is installed or not See The Software Sup port Tool on page 2 12 4 Restore t
141. m b Take out the paper close the door and press the Strip key The unit should sound a series of 3 tones indicating a printer problem M4735A Service Manual 2 27 Performance Verification Figure 2 4 Printer Test Output Diagonal lines Vertical bars 7 Diamonds 2 28 Ty yy 277 D 164600446666049446060040000000094 160046000400060000000600000000604 M1722 12 Performance Verification and Safety Tests M4735A Service Manual Performance Verification ECG Tesis These instructions describe how to test the ECG functions Each of the ECG tests assumes the unit and the simulator are still set up as they were at the end of the previous ECG test If all results are as described the unit passes that portion of the test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin troubleshooting and repairing the unit as needed See Troubleshooting on page 3 1 and Table 3 7 Operational Problems ECG Monitoring Pads or Leads on page 3 18 1 Start the test a Access the Diagnostic Test menu as described in Diagnostic Mode on page 2 11 b Select ECG Test and press ENTER c The display should look similar to Figure 2 5 Figure 2 5 ECG Test Display MAIN C aia ENTER ECG TEST Selected Lead Lead
142. mV 2a Kans sample clock This image displays the defibrillator current waveform for a 150J discharge into 125ohms The current probe is set to 10A division 10A 10mV The peak current is about 14A Note that the trailing edge of the waveform is just off the right edse of the screen 150J 125 ohms 5 ms div p running auaiting trigger HORIZONTAL remote talk 5 00 ms div i i 10 kSa s 10 000 ms i i reference Tv TT Im ters GMB cht repetitive ealtime saa Danaa lasse Seen ca PEOR P ae Se Se alate eee eo le sequential i 1 i i MEINE on record length 15 000 ms 10 000 ms 35 000 ms 5 00 ms div realtime x 02 adjust i m 10 k 10 0000 mV ics sample clock This image displays the defibrillator current waveform for a 150J discharge into 125ohms The current probe is set to 10A 10mV 10A 10mV The peak current is about 14A Note that the timebase has been changed to 5ms division so that the entire waveform could be captured 7 10 Specifications Waveforms 200J NENNEN Waveforms 200J 200J 25ohms p running auaiting trigger VERTICAL remote talk 10 0 mv div position 10 0000 my 2 0000 ms 8 0000 ms 18 0000 ms 2 00 ms div realtime preset more probe This image displays the defibrillator current waveform for a 200J discharge into 250hms The current probe is set to 20A div 20A 10mV The peak current is about 66A 200J 50ohm
143. mV amplitude at some nominal rate e g 60 bpm 2 Setup the M4735A Set the M4735A to Manual operating mode not Diagnostic Mode 3 Check the displayed ECG Using the LEAD SELECT softkey verify that the display shows a normal ECG with a clean baseline for both Pads and Lead II 4 Check the Heart Rate HR Verify that the Heart Rate HR displayed is correct 5 Check Leads Off a Disconnect the ECG simulator from the pads cable and verify that the display shows a dashed line in place of the waveform and that the unit both alarms and gives the Pads Off message b If using a 5 lead ECG cable set the unit to monitor from the V lead Performance Verification and Safety Tests WARNING M4735A Service Manual Performance Verification c Disconnect each of the ECG leads from the simulator one at a time and verify that the display shows a dashed line in place of the wave form and that the unit both alarms and gives the Leads Off message To check ECG printing functions 6 Reconnect the simulator Connect the simulator to the M4735A as described in step 1 above Print a strip a Printa strip verify that it shows a normal ECG with a clean baseline b Verify that the date time and configuration information printed at the top of the strip is correct Shock Advisory Functional Check This section describes how to check the Shock Advisory function 1 Set up the simulator a Connect the ECG simulato
144. mptoms above Printer failure Control PCA failure Replace Printer Replace Control PCA Display The following table covers problems that might arise with the display NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 12 Operational Problems Display Symptom No response all light or all dark Possible Causes Control PCA failure Display failure Suggested solution Replace Control PCA Replace Display Fails Display Test in Diagnostic Mode display problem other then symptoms above Display failure Control PCA failure Replace Display Replace Control PCA Fails Display Test in Diagnostic Mode indicator LEDs Control PCA failure Main or Pacer Keypad failure Replace Control PCA Replace Main or Pacer Keypad 3 26 Troubleshooting Audio The following table covers problems that might arise with the audio tones or voice prompts Operational Problems NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 13 Operational Problems Audio Tones Voice Prompts Symptom No audio at all Possible Causes Speaker failure Control PCA failure Suggested solution Replace Speaker Assembly Replace Control PCA
145. n Example X p page 2 22 Includes Data figuration and options x p Card Test and time date check User Interface In Diagnostic Mode run All responses as expected U x Tests U the following tests page Example U p 2 25 Controls Test All keys respond as expected Display Test Visual Pass assessment by service personnel Audio Test Audio Pass assessment by Service personnel Printer Test Print quality visual Pass assessment by service per sonnel Print speed 25 mm 5 1 25mm 2 4 Performance Verification and Safety Tests Table 2 1 Performance Verification and Safety Tests Test Matrix Test Group Name Test or Inspection to Perform Expected Test Results Data to Record X p pass or f fail ECG Tests E In Diagnostic Mode run All data within limits all E aaaa bbbb cc dd the ECG Tests page 2 29 checks pass x p ee ffff x Example E 1000 1000 20 20 50 2000 p e Status messages lead e Good displayed for all pad DSP three DC offset Ignore used only in fac tory manufacturing Amplifier gain Pads Peak to Peak Moni 1000mV 10 tor aaaa Leads Peak to Peak Diag 1000mV 10 nostic bbbb Amplifier noise Leads Peak to Peak Diag 0 30uV nostic cc Pads Peak to Peak Moni 0 30uV tor dd PCI measurement PCI Paddles in Pockets 50 300 ee PCI Paddles open ffff 212500 Pacing Test P In Diagnostic
146. n onto a Data Card or print the configuration so the configuration can be restored after the repair is complete Open the case safely See Opening the Case on page 4 24 Disconnect and remove the Control PCA See Control PCA on page 4 36 Remove the Shield Plate See Shield Plate on page 4 40 Disconnect and remove the Keyscan PCA See Keyscan PCA on page 4 42 Remove the Front Bezel See Bezel Assembly on page 4 48 Removal 1 2 Remove the Display a Unscrew the 2 T10 screws in the corners of the Display See Figure 4 28 on page 4 55 b Liftthe display off the bezel and set it display side down on a static protected surface Disconnect the 2 ribbon cables from the display a Unlatch the larger ribbon connector by pressing out and down on the latches at each end of the connector b The smaller connector has no latch just wiggle it gently from side to side while pulling it out Replacement 1 Reconnect the 2 ribbon cables to the Display Latch the larger one in position be sure the smaller one is fully inserted Replace the Display on the Bezel Lay the Display on the Bezel and replace the 2 screws Removal and Replacement M4735A Service Manual Internal Assemblies Top Case Figure 4 28 Removing the Display Display Assembly Display Ribbon Cables After Repair After repairs are complete perform the following steps 1 Replace the Bezel on the case See B
147. nal problems 12 battery test 2 6 2 36 3 26 Data Card Full 3 14 capacitor 4 30 4 84 removing and Data Card Interrupted 5 8 5 22 replacing 4 54 5 3 15 charging 1 2 3 21 6 8 5 22 Data Card Not In 9 specifications 7 4 Service 3 15 door replacement 5 12 Event Summary 7 6 Incompatible Data Card 3 15 No Data Card Present 3 15 operational problems 3 30 replacement 5 19 test 2 23 Defib Disarmed 3 14 Defib Failure 3 13 3 24 dimensions and weight 7 7 Disarm Test 2 6 2 38 discharging 4 30 disposal 4 3 Extended Self Test 2 24 operational problems 3 21 pads 5 19 specifications 7 1 test load 5 20 Diagnostic test Defibrillator Disarm Test 2 38 Defibrillator Test AC Power 2 35 Defibrillator Test Battery Power 2 36 Diagnostic Mode 2 11 ECG test 3 20 testing 2 26 Earth leakage 2 39 ECG monitor amplifier tests 2 30 connector 4 60 5 12 ECG Fault 3 12 frequency response 7 4 functional checks 2 16 operational problems 3 18 PCI function 2 32 specifications 7 3 status messages 2 30 tests 2 5 3 20 Electrode monitoring 5 19 Electromagnetic compatibility EMC 7 19 Environmental specifications 7 7 safety precautions 7 17 Extended Self Test 2 Error code 3 4 3 5 3 10 4 2 22 3 17 cw qum Event Summary 7 6 er d Ret er Extended Self Test 2 4 2 22 eee failures 3 17 User Interface Tests 2 4 2 25 External assembly battery cover 4 10 Battery
148. nector a Release the locking tabs on the metal clip around the SpO connector using a small flat bladed screwdriver Pull and remove the metal clip See Figure 4 33 on page 4 64 b Slide the connector gasket and flex circuit out through the hole in the case 4 62 Removal and Replacement M4735A Service Manual Internal Assemblies Top Case Figure 4 32 Removing the Sp0 Connector Replacement 1 SpOs Connector Metal Clip Flex Circuit to SpO2 Connector Replace the SpO Connector a Install the new gasket in place on the new connector Slide the con nector and flex back through the hole in the case b Align the connector and gasket with the notches in the case and insert it in the hole Make sure the gasket is in place properly between the connector and the outside of the case c Press in firmly on the connector to compress the gasket Slide the metal retainer clip into place behind the 2 plastic lugs on the connec tor being sure it locks into place Use the new retainer clip that came with the connector See Figure 4 33 on page 4 64 2 Connect the SpO Connector a Connect the flex circuit from the SpO connector to the SpO PCA Line it up carefully avoiding excessive twisting There is no latch just push straight in See Figure 4 30 on page 4 59 After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode
149. nergy discharges remain with a new battery at room temperature 25 C Specifications Specifications Battery Storage Should not be stored above 409C for extended periods of time Charger Output Unit can be operated using only AC power with no battery installed Thermal Array Printer Continuous Heal Time Strip User starts and stops the strip The Print Strip prints the selected ECG lead with the following data HEADER 1 Date Time Heart Rate the SpO Value if available and the text Delayed if printing has been configured for Delayed Mode Prints every 12 seconds HEADER 2 Current mode AED Manual Lead Gain filter setting the text Sync if Sync has been enabled and Pacer Settings consisting of the Pacer Mode Rate and Current if currently pacing the patient Prints every 12 seconds with Header 1 HEADER 3 Changes in Mode Gain Lead Sync and Pacer Settings FOOTER Drug Annotations HR SpO limits on a Limit Alarm the Results of Analysis in AED Mode No Shock Advised Shock Advised or Cannot Analyze Charging to xxxJ Shock Delivered No Shock Deliv ered Disarm Battery Low SYMBOLS Mark Triangle for presses of the Mark key an Alarm Bell Alarm Limit Violations Lightning Bolt Shock Delivered followed by b for biphasic Vertical stripe Boundaries Pacer Sync Tick Marks Event Printing Mark key automatically documents ECG and events during defibrillation episodes The Mark key can
150. nfiguration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 39 Internal Assemblies Top Case Shield Plate The sections below describe how to remove and replace the metal Shield Plate located under the Control PCA This procedure is often needed when remov ing and replacing other assemblies Preparation Disconnect and remove the Control PCA See Control PCA on page 4 36 Removal a Remove the 5 screws around the edges of the shield plate See Figure 4 22 on page 4 40 b Liftthe plate straight up Figure 4 22 Removing the Shield Plate Shield Plate Slot Tab Keyscan PCA Tab Slot 440000 Removal and Replacement Internal Assemblies Top Case Replacement a Lower the plate into place Be sure to engage the tabs on the Keyscan PCA into the mating slots in the Shield Plate b Replace the 5 screws TIP Screw installation is easier if all screws are started in their holes before any one of them is tightened M4735A Service Manual 4 41 Internal Assemblies Top Case Keyscan PCA The following sections describe how to remove and replace the Keyscan PCA Preparation 1 Save the configuration If possible save the customer s conf
151. ng at this time e Pass through of EL display data and control signals e Internal test load for paddle discharge M4735A Service Manual 6 3 PCA Descriptions 6 4 The SpO PCA serves as the interface to the SpO sensor including e Generation and control of voltages to drive the LEDs in the sensor e Receiving and processing the signals from the SpO sensor Battery PCA The Battery PCA provides the contacts with which the battery mates It also has the main fuse and it provides the function of detecting whether the installed battery is an M3516A battery or not see Contacts Battery Type on page 6 12 It also detects the temperature of the battery Battery The M3516A battery differs from similar batteries in that it is capable of pro viding much higher current without causing an internal protection device to open and disconnect the battery AC Power Module The AC Charger Module provides regulated DC power to the unit as well as charges the battery Printer The printer provides hard copy output of text waveforms event data etc It senses when the paper is out or the door is left open Theory of Operation System Level Interconnections System Level Interconnections Figure 6 1 System Interconnections abire pews egaa ir wda UE LISSE Fil zr Wad HYO2SANN iuc mI cir zir KRIGS OTL Wad TOMLNO Dass Sc FI ATBPIJSEY H31MHlHd ppsqu Sagurcos pria remo dag OFLES
152. nt the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the ECG Connector Disconnect the cable from the ECG Connector to the Parameter PCA at the Parameter PCA Press on the latch to release the connector See Fig ure 4 3 on page 4 61 2 Unlatch and remove the ECG Connector a Release the locking tabs on the metal clip around the ECG connector using a small flat bladed screwdriver Pull and remove the metal clip b Slide the connector cable gasket and ferrite out through the hole in the case Replacement 1 Replace the ECG Connector a Using the new gasket that came with the connector install the gasket in place on the connector Slide the cable and ferrite back through the hole in the case b Align the connector and gasket with the notches in the case and insert it in the hole Make sure the gasket is in place properly between the connector and the outside of the case c Press in firmly on the connector to compress the gasket Slide the metal retainer clip into place behind the 2 plastic lugs on the connec tor being sure it locks into place Use the new retainer clip that came with the connector See Figure 4 31 on page 4 61 2 Connect the ECG Connector a Loop the cable around the case post b Connect the ECG connector cable to the Parameter PCA being sure the connector latches 4
153. o some working state Unit still unresponsive Main fuse open Open in battery wir ing Short or other failure somewhere in unit Replace Main Fuse 2 Replace Power PCA and Main Fuse 1 Check replace Battery PCA 2 Check replace wiring to Power PCA Disconnect printer and dis play from Control PCA at Control PCA Then pro ceed to step 3 3 8 Troubleshooting General Problems 3 Turn on Power and observe unit s response Unit powers up to some working state Unit still unresponsive Short in printer or dis play Short or other failure somewhere in unit Isolate the fault by recon necting one at a time and powering up again Then replace the display or printer as needed 1 Replace Control PCA 2 Replace Power PCA 3 Replace Parameter PCA If all above unsuccessful return unit for bench repair M4735A Service Manual 3 9 General Problems Error Codes The System Log provides error codes in 5 digit hexadecimal format as shown below NOTE Before replacing any parts check to see if the cables and flex circuits are Table 3 2 Error Codes properly connected See Servicing Notes on page 4 1 Error Code 00000 00400 Possible Causes Defib failure charging circuits Corrective Actions 1 Replace Power PCA 2 Replace Control PCA 01000 Defib failure biphasic processor 1
154. odule to enter power supply mode 6 13 System Functional Descriptions Figure 6 3 Power Distribution and Fusing F X I L Pin Puskikun x N EU COR q Control PCA Display Compal PC NE y ack 39i jo ce ir Fia punter Fey ula ker e en 1 T iw 1 Ba i Cariri Pc d Kaan Curius POA Circuits loge mund Logie wd lans i Lets E Keyacan PCA Printer Parameter PCA 6 14 Theory of Operation System Functional Descriptions Lithium Backup Battery The Backup Battery located on the Control PCA provides standby power to maintain data during times when the main battery is either absent or discharged and no external power is supplied The data maintained includes the user s configuration choices and the system time and date Data Card The Data Card allows the capture of key information such as ECG waveform shock advisories charging and delivering a shock The Data Card is read by the Code Runner Web system for post event analysis CAUTION The Data Card must only be inserted or removed when the unit s power is off A Data Card inserted while the power is on will not be recognized by the unit If a Card is removed while the power is on its stored data may be corrupted and rendered unreadable M4735A Service Manual 6 15 System Functional Descriptions This page intentionally left blank 6 16 Theory of Operation 7 Specifications Overview This section provides
155. omer removes all paddles cables sensors accessories battery data card and consumables from defective unit e Customer cleans and decontaminates the defective unit e Customer packs the defective unit into the box and ships it to Agilent Return shipping instructions are included with the exchange unit Table 5 1 M4735A Unit Exchange Part Numbers Description Part Number M4735A Base Unit American English M4735 68900 M4735A Base Unit French M4735 68901 M4735A Base Unit w Pacing American M4735 68910 English M4735A Base Unit w Pacing French M4735 68911 M4735A Base Unit w SpO American M4735 68920 English M4735A Base Unit w SpO French M4735 68921 M4735A Base Unit w SpO and Pacing M4735 68930 American English M4735A Base Unit w SpO and Pacing M4735 68931 French M4735A Service Manual 5 5 Replacement Parts Tables 5 6 Replacement Parts Tables These tables provide part numbers for ordering specific replacement assem blies and parts Electrical Assemblies Control PCA Other Replacement PCAs Other Electrical Assemblies Individual Electrical Parts Mechanical Assemblies Bezel Assembly Pacer Keypad Assembly Other Mechanical Assem blies Connector Assemblies Individual Mechanical Parts Instruction Label Sets Case Label Sets Other Labels Supplies and Accessories Supplies amp Accessories Key Components Key Components Page 5 7 5 8 5 8
156. on on top of the Parameter PCA The SpO PCA should be oriented so the 2 connectors are on top and pointing to the right 2 Connect the SpO PCA a Connect the flex circuit from the Parameter PCA Slide the flex cir cuit into place then latch the receptacle on the PCA by pushing in on the top of the receptacle b Connect the flex circuit from the SpO connector There is no latch push straight into the PCA connector See Figure 4 30 on page 4 59 4 58 Removal and Replacement Internal Assemblies Top Case Figure 4 30 Removing the Sp0 PCA Ribbon Cable to Control PCA Parameter Flex Circuit PCA to SpO Connector SpOs PCA Flex Circuit to Parameter PCA After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 59 Internal Assemblies Top Case ECG Connector The ECG connector is located at the back of the top case next to the SpO connector The following sections describe how to remove and replace the ECG Connector Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or pri
157. on t respond Replace 1 Keyscan PCA 2 Con trol PCA 3 Bezel Assembly All keys don t respond Replace 1 Keyscan PCA 2 Control PCA 3 28 Troubleshooting Operational Problems Battery and Charging Circuits The following tables cover problems that might arise with the Battery or the unit s battery charging circuits NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 15 Operational Problems Battery Charging Circuits Symptom Low battery life depletes quickly in use Possible Causes Very frequent use not charging long enough between uses Battery failure AC Power Module failure Failure on Control PCA Power PCA or Battery PCA Suggested solution Charge fully between uses Use spare batteries and adapters as needed to allow complete charging Run Battery Capacity Test see Battery Capacity Test on page 2 40 If battery fails test replace bat tery Replace AC Power Module Replace 1 Control PCA 2 Power PCA 3 Battery PCA Fails Battery Capacity Test Battery old worn out or failed Failure on Control PCA Replace battery Replace Control PCA Table 3 16 Power Indicator Matrix INDICATORS SYSTEM STATE MEANING ACEOWER BAT go Battery in Unit Power CHARGING Place ON Mains G GREEN
158. onnector has no latch just wig gle gently from side to side while pulling it out Removal and Replacement Internal Assemblies Top Case f Disconnect the 2 paddle wires Remove the T10 screws that connect them to the threaded inserts under the paddle holders For now leave the wires connected to the spade connectors on the PCA NOTE Flex Flex Circuits 2 Circuits 2 to Pacing to Main Keypad Keypad Cable to IrDA PCA M4735A Service Manual These T10 screws are a different length than the T10 screws used in the rest of the unit Keep them separate by screwing them back into the threaded inserts by hand and leaving them there until needed TIP If the Keyscan PCA is being removed to get access to the Front Bezel or the Display don t disconnect the paddle wires after unscrewing the 2 screws step 2 below just flip the PCA over and lay it component side down on the underside of the Printer bucket Figure 4 23 Keyscan PCA Connections Single Wire to Paddle Wires 2 Small Ribbon Cable Power PCA to Display Large Ribbon Ribbon Cable to Ribbon Cable to Work Cable to Display Control PCA Energy Select Surface Switch 4 43 Internal Assemblies Top Case 2 Unscrew and remove the Keyscan PCA a Unscrew the 2 T10 screws located at the edge of the PCA nearest you they attach the PCA to the threaded standoffs Be sure to unscrew just the screws and not the standoffs b Liftthe Keyscan PCA out of t
159. ooting on page 3 1 Performance Verification and Safety Tests Performance Verification Figure 2 2 Sample System Log Printout M4735A SYSTEM LOG Firmware Versions Error Codes Main 06 90007 18 33 19 MAY 2000 DSP 02 196 06 00 Key 01 Sp02 02 42 01 04 Language Serial Number Options Shocks English US01000241 Pacer Sp02 2 M4735A Service Manual 2 21 Performance Verification Extended Self Test The Extended Self Test checks that all internal processors are operating and communicating with each other If all results are as described the unit passes this test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin troubleshooting and repairing the unit as needed See Troubleshooting on page 3 1 and Table 3 6 Extended Self Test Fail ures on page 3 17 NOTE 2 22 Be sure the printer has paper and that the printer door is closed No paper or an open door will generate an erroneous Fail in the Timebase test 1 Connect the test load to the pads cable 2 Access the Diagnostic Test menu See Diagnostic Mode on page 2 11 3 Run the test Select Extended Self Test and press ENTER The printout should appear similar to Figure 2 3 Figure 2 3 Sample Extended Self Test Printout M4735A EXTENDED SELF TEST 18 48 5 19 2000 RAM Pass ROM Pass System Pass Data Card Not Tested CODEC Pass IRDA Not Tested Timebase Pass Defib Pass
160. or gasket flex cable retainer clip Patient Connector Assembly M3500 69562 Includes connector O ring internal cables ECG Out AC Input Assembly M4735 69563 Includes ECG Out connector AC Input receptacle cables Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 5 12 Replacement Parts Mechanical Assemblies Individual Mechanical Parts These mechanical parts are available separately Table 5 10 Individual Mechanical Parts Description Part Number Notes Cable Tie Wrap 1400 0577 Used to secure Lithium Battery to Control PCA ECG SpO Connector Retainer Clip M2475 07101 Used on both ECG and SpO con nectors T10 M3X4 screws 0515 0663 Used only inside the case to connect the paddle wires from the Keyscan PCA to the through case connection to the Paddle Clip T10 M3X6 screws 0515 0430 Used for battery cover interior assemblies PCAs Also used out side the case to connect the Paddle Clip to the through case connection to the Keyscan PCA T10 M3X20 screws 0515 1410 Long screws used for securing Parameter PCA to top case If SpOz installed secures SoO2 PCA to Parameter PCA T15 M4 flat head screws 0515 2044 Used only for securing paddle holder to case T15 M4X10 screws 0515 0380 Used for case exterior Rubber Feet M4735 69562 Includes 4 feet Energy Select Knob M4735 69565 I
161. or its accessories in conditions outside the environmental specifications can result in device or accessory malfunction WARNING Medical electrical equipment which does not incorporate defibrillator protection should be disconnected during defibrillation WARNING Electric shock hazards exist internally Do not remove assembly screws M4735A Service Manual Refer servicing to qualified personnel Safety Considerations CAUTION This device has not been evaluated for use with electrosurgery equipment NOTE This device and accessories are not intended for home use CAUTION Do not discharge the defibrillator with the paddles shorted together WARNING Properly dispose of or recycle depleted batteries according to local regulations Do not puncture disassemble or incinerate batteries WARNING Where the integrity of the external protective earth conductor is in doubt the device shall be operated from its internal power source NOTE For operation in the U S the attachment plug must be the proper NEMA type for connection to the alternative voltage CAUTION Be aware of patient cables including ECG monitoring equipment when used with high frequency surgical equipment 7 18 Specifications Electromagnetic Compatibility Electromagnetic Compatibility When using the M4735A Heartstream XL Defibrillator Monitor electromag netic compatibility with surrounding devices should be assessed A medical device
162. ors which are approved by Agilent and known to be good Also make sure that all external cables are fully inserted in their receptacles e Anew empty Data Card of the correct type M3510A Plugging in the wrong type of card e g a modem card can cause startup fail ures To help identify problems which may be caused by external components or by improper use refer to e Table 3 3 System Messages and Table 3 4 Momentary mes sages e The individual tables describing Operational Problems associated with each function defibrillation ECG etc See Troubleshooting Tables on page 3 6 Proceed to Internal Failures If none of the above resolves the problem proceed to Diagnosing Internal Failures on page 3 5 Troubleshooting Diagnosing Internal Failures Diagnosing Internal Failures The following steps will help you isolate an internal failure to a particular subassembly Capture the Configuration Data If not already captured store the unit s configuration data on a Data Card or print out the current configuration if possible See Configuration Mode on page 2 10 Print the System Log If not already printed print out the System Log if possible and use any error codes to help isolate the problem See System Log on page 2 20 NOTE The M4735A log of error codes only reports the last 10 errors If new errors are created at this stage they may overwrite the existing codes and valuable clues to the re
163. pad and the display window installed Table 5 6 Replacement Bezel Assembly Language Part Number English M4735 69400 French M4735 69401 German M4735 69402 Dutch M4735 69403 Spanish M4735 69404 Italian M4735 69405 Swedish M4735 69406 Norwegian M4735 69408 Finnish M4735 69409 Chinese M4735 69411 Portuguese M4735 69413 Russian M4735 69414 Polish M4735 69419 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Replacement Parts M4735A Service Manual Pacer Keypad Assembly Mechanical Assemblies Each assembly below contains both the membrane switches and the rubber overlay Table 5 7 Replacement Pacer Keypad Assembly Language Part Number English M4735 69500 French M4735 69501 German M4735 69502 Dutch M4735 69503 Spanish M4735 69504 Italian M4735 69505 Swedish M4735 69506 Norwegian M4735 69508 Finnish M4735 69509 Chinese M4735 69511 Portuguese M4735 69513 Russian M4735 69514 Polish M4735 69519 Replacement Blank Pacer Cover M4735 69540 Rubber overlay only for units without Pacing Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 5 11 Mechanical Assemblies Other Mechanical Assemblies These assemblies come with s
164. page 5 15 to select the correct version and language e Case Label Set These are available in 2 versions SpO no SpO and in all the supported languages See Table 5 13 on page 5 16 and Table 5 14 on page 5 17 to select the correct language M4735A Service Manual 4 77 Internal Assemblies Top Case After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 78 Removal and Replacement Internal Assemblies Bottom Case Internal Assemblies Bottom Case The sections that follow describe removing and replacing assemblies that reside in the Bottom Case These assemblies include Assembly Battery PCA Defibrillator Capacitor Power PCA AC Power Module Patient Connector Replacement Bottom Case M4735A Service Manual Page 4 80 4 84 4 86 4 90 4 94 4 97 4 79 Internal Assemblies Bottom Case Battery PCA The Battery PCA is mounted in the Battery compartment under the Battery Cover It has a cable assembly that enters the case through a rubber gasket Once inside the case the cable assembly connects to the Power PCA and to the AC Power Module Pre
165. paration 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Unplug 3 connectors from the Battery PCA See Figure 4 39 on page 4 81 a Unplug the 4 pin connector to the Power PCA the battery connector b Unplug the 2 pin connector to Power PCA c Unplug the 2 pin connector to the AC Power Module 2 Pull the Battery PCA up See Figure 4 40 on page 4 81 a Stand the bottom case up on its edge b Pullthe Battery PCA straight up out of its slot in the bottom case 3 Pullout the wires and gasket a Remove the gasket from its hole in the case TIP Depress the tabs on the gasket inside the case with a small straight bladed screwdriver Then pull from the outside of the case and push from the inside to work the gasket free b Guide the wires and their connectors out of the hole 4 80 Removal and Replacement M4735A Service Manual Internal Assemblies Bottom Case Figure 4 39 Battery PCA connections 2 Pin Connector 2 Pin Connector to to Power PCA AC Power Module 4 Pin Connector to Power PCA Battery Connector Figure 4 40 Removing the Battery PCA Battery PCA Spring Battery PCA Gasket Battery Eject Spring 4 81 Internal Assemblies Bottom Case Replacement 1 Insert the wi
166. pecific parts as noted Table 5 8 Other Mechanical Assemblies Description Part Number Notes Data Card Door Assembly M4735 69560 Includes door latch pivot spring assembly Paddle Holder Assembly M4735 69561 Includes plastic retainer metal clip Screws Battery Eject Assembly M3500 69561 Includes catch button spring Top Case Assembly M4735 69551 Includes Speaker Label Branding Label Hex Standoffs for Keyscan PCA Case Standoffs Printer cable IRDA lens and ECG SpO hole plug retainer clips and gas kets Bottom Case Assembly M4735 69550 Includes Data Card Door Battery Cover Battery Eject Mechanism Hole Plug with gasket case gaskets rubber feet Note When ordering the Bottom Case be sure to order the Primary Label as well When ordering be prepared to provide information from the existing label model number serial number options plus customer information name and address and information identifying the service person name address Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Connector Assemblies These replacement connectors come with specific parts as noted Table 5 9 Replacement Connector Assemblies Description Part Number Notes ECG Connector Assembly M4735 69553 Includes connector gasket retainer clip cable and ferrite SpO Connector Assembly M4735 69554 Includes connect
167. ported problem might be lost Therefore always attempt to print the System Log before proceeding Run Self Tests To run the Self Tests perform the following steps 1 Enter Diagnostic Mode See Diagnostic Mode on page 2 11 2 Run the Extended Self Test See Extended Self Test on page 2 22 3 Run the individual Diagnostic Tests that are applicable to the problem Diagnostic Tests are described starting with User Interface Tests on page 2 25 Use the Troubleshooting Tables Use the Tables provided starting on page 3 6 to isolate the problem based on factors such as e Error codes reported in the System Log Table 3 2 page 3 10 e Extended Self Test failures Table 3 6 page 3 17 e Operational problems starting with Table 3 7 on page 3 18 M4735A Service Manual 3 5 Troubleshooting Tables Troubleshooting Tables Tables are provided to cover the troubleshooting topics below General Problems Page Unit Unresponsive 3 8 Error Codes 3 10 System Messages 3 12 Momentary Messages 3 14 Audio Tones 3 16 Extended Self Test Failures 3 17 Operational Problems Page ECG Monitoring 3 18 SpO2 Monitoring 3 20 Defibrillation and Cardioversion 3 21 Pacing 3 24 Printer 3 25 Display 3 26 Audio 3 27 Keys 3 28 Battery and Charging Circuits 3 29 Data Card 3 30 Using the Tables The tables provide both Possible Causes and Corrective Actions Use them as follows e The Possible Causes are arranged in order of the ap
168. prompts QRS Beeper Charging Tone Charge Done Tone printer AC Power LED Battery Charging LED Armed Indicators Charge Done Tone Available Energy indicated on dis play Voice Message Patient Analysis Per protocol evaluates patient ECG and signal quality to determine if a shock is appropriate and evaluates connection impedance for proper defibrillation pad contact Shockable Rhythms Ventricular fibrillation with amplitude 100 uV and wide complex ventricular tachycardia with rates greater than 150 bpm Sensitivity and Specificity Meets AAMI guidelines ECG Monitoring Inputs Single channel ECG may be viewed on display and printed Pads ECG is obtained through two multifunction defibrillation electrode pads Lead I II or III is obtained through the 3 lead ECG cable and separate moni toring electrodes With a 5 lead cable lead aVR aVL aVF or V can also be obtained Lead Fault LEADS OFF message and dashed line appear on the display if an electrode or lead wire becomes disconnected Paddle Fault NO PADDLES CONNECTED message and dashed line appear on the display if paddles become disconnected Pad Fault PADS OFF message and dashed line appear on the display if a pad becomes disconnected Heart Rate Display Digital readout on display from 15 to 300 bpm with an accuracy of 10 Heart Rate Alarms Configurable pairs of low and high heart rate alarm lim its 30 to 100 60 to 140 90 to 160 and 120 to 200 bpm
169. proximate proba bility of their occurrence Investigate them in the order given e For each Possible Cause try the Corrective Actions listed If the first Corrective Action does not fix the problem try the others in the order listed e Ifnone of the Corrective Actions fixes the problem then try the next Possible Cause listed NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 3 6 Troubleshooting Troubleshooting Tables M4735A Service Manual 3 7 General Problems General Problems The folowing tables describe general or system level problems For problems pertaining to a particular operation or function see Operational Problems on page 3 18 Unit Unresponsive Isolate the fault by following the steps in Table 3 1 below NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 1 Unit Unresponsive Test 1 Connect AC Power to unit Result AC Power indicator turns GREEN AC Power indicator stays OFF Possible Causes Normal response No power in AC out let Power cord defective AC Power Module failure Corrective Actions None Proceed to step 2 Restore power Replace power cord Replace AC Power Module 2 Turn on Power and observe unit s response Unit powers up t
170. quirements of the Medical Device Directive 93 42 EEC and carries the CE 0123 mark accord ingly Authorized EU representative Agilent Technologies GmbH Herrenbergerstrasse 130 D 71034 Boeblingen Germany Fax 49 7031 14 2346 ii Conventions This manual uses the following text conventions Printed and On Line NOTE Notes contain additional information on servicing this product CAUTION Caution statements describe conditions or actions that can result in damage to the equipment or loss of data WARNING Warning statements describe conditions or actions that can result in personal injury or loss of life Text represents messages that appear on the display represents softkey labels that appear on the display Softkey above or below the button to which they correspond On Line Only Hypertext represent hypertext links which will display as blue click on the link to go to that destination then click on the destination to return iii This page intentionally left blank Contents Conventions Printed and On Line eese eeeeeeeee eene een ene ne Rete eene eee nh eee eene e sen e e ens e sena lii e ugbnibl MT lii WL DOTA TT C lii Introduction LB Urn Ns BR PIE TET ER RR NOME RR RP RR TEN 1 1 Defibrillator Monitor eeeessesseeeeeeennn nne e nene nenne nenne ne ne eh eres eh etse nnn etse ner ere 1 1 Batteries x2 iiec e
171. r grip on the knob try wearing rubber gloves Replacement Replace the Energy Select Knob Push the knob onto the shaft Be sure the knob is pressed fully into place M4735A Service Manual 4 17 External Assemblies Paddle Holders The following sections describe how to remove and replace the Paddle Hold ers Preparation Remove the paddles from the holders Removal 1 Remove the Paddle Holder a Remove the 2 T15 screws NOTE 4 18 These flat head T15 screws are different from the pan head T15 screws used in the rest of the unit Keep them separate and use them only for the Paddle Holder b Slide the Paddle Holder out from under the metal clip 2 Remove the clip a Remove the T10 screw b Remove the clip Figure 4 8 Removing the Paddle Holder Paddle Holder Flat Head Metal Clip Flat Head Screws Screws Removal and Replacement M4735A Service Manual External Assemblies Figure 4 9 Removing the Clip Metal Clip Replacement 1 Replace the clip a Place the clip in its slot in the case Use the new one that came with the replacement Paddle Holder b Replace the T10 screw and tighten securely 2 Replace the Paddle Holder a Slide the Paddle Holder into position under the clip b Replace the 2 T15 screws and tighten securely After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1
172. r to the pads cable b Setthe simulator for normal sinus rhythm NSR 1mV amplitude at some nominal rate e g 60 bpm Set up the M4735A Set the M4735A to AED Mode Check Shock Advisory with NSR a Press ANALYZE b Verify that the defibrillator responds with No Shock Advised Check Shock Advisory with Asystole a Setthe simulator to Asystole or turn the simulator off and press ANALYZE b Verify that the defibrillator still responds with No Shock Advised Check Shock Advisory with VF a Setthe simulator to VF Ventricular Fibrillation and press ANALYZE b Verify that the defibrillator responds with Shock Advised and charges up to 150J If the unit is configured to do so verify that it automati cally prints a strip of the event Do not discharge the stored energy unless you are certain the simulator contains a 50 ohm test load Performance Verification c If the simulator contains a 50 ohm test load discharge the stored energy into the test load If it does not or you are not sure wait until the defibrillator reports Shock cancelled before proceeding Synchronized Cardioversion Functional Check This section describes how to check the synchronized cardioversion function 1 Setup the simulator and the analyzer a Connectthe ECG simulator to the ECG cable Connect the defibrilla tor analyzer to the pads cable b Setthe simulator for normal sinus rhythm NSR 1mV amplitude at some nominal rate
173. re the AC Power Module TIP Another way to remove the screws is to mate the case halves together flip the case upside down then remove the screws Then flip the case rightside up and unmate the case halves 2 Disconnect the AC Power Module a Disconnect the 2 pin in line connector from the Battery PCA press on the latch to release b Disconnect the 6 pin connector from the Power PCA press on the latch to release c Disconnect the 4 pin connector from the Power PCA press on the latch to release 3 Lift the Defibrillator Capacitor out of the way Lift up the Defibrillator Capacitor together with its foam base Lift straight up then turn the capacitor to the right and rest it on the Power PCA See Figure 4 41 on page 4 85 4 90 Removal and Replacement Internal Assemblies Bottom Case Figure 4 44 AC Power Module Connections 4 Pin Connector to 2 Pin Connector to Power PCA Battery PCA 6 Pin Connector to Power PCA M4735A Service Manual 4 9 Internal Assemblies Bottom Case 4 Remove the AC Power Module Tilt the top of the AC Power Module in toward the Power PCA Guide the AC Power Module out from under the end of the Power PCA then lift it out of the case Figure 4 45 Removing the AC Power Module AC Power Defibrillator Module Capacitor Work Surface Replacement 1 Replace the AC Power Module a Guide the bottom of the AC Power module into place under the Power PCA aligning the not
174. res and gasket into the case a Start with the 2 halves of the case mated together Turn the unit over so the bottom faces up a Guide the wires and connectors from the new PCA into the hole in the bottom case b Install the new gasket into the hole TIP The gasket is fully seated when its tabs protrude out evenly around the hole on the inside of the case 2 Replace the Battery PCA into position a Install the Battery Plate Spring onto the standoff on the Battery PCA b Install the Battery PCA into its slot in the case 3 Flip the case over and plug in the 3 connectors a Turn the case over so the top faces up b Openthe case c Plug the 4 pin connector onto the Power PCA the battery connector d Plug the 2 pin connector onto the Power PCA e Plug the 2 pin connector into the AC Power Module 4 82 Removal and Replacement Internal Assemblies Bottom Case After Repair After this repair is complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 83 Internal Assemblies Bottom Case Defibrillator Capacitor WARNING Always discharge the defibrillator cap
175. ritish English M4735 68160 Chinese M4735 68161 Australian English M4735 68170 Power PCA With Pacing M4735 68110 Power PCA M4735 61110 Serial Number Without Pacing M4735 68111 Power PCA M4735 61111 Serial Number Other Replacement PCAs Parameter PCA M4735 68140 Parameter PCA M4735 61140 Serial Number Keyscan PCA M4735 68120 Keyscan PCA M4735 61120 Serial Number M4735 68126 M3500 60126 Serial Number Battery PCA M3500 66130 Battery PCA M3500 60130 Date Code M4735A Service Manual 5 21 Key Components Table 5 17 Key Components Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method Other Electrical Assemblies Display Assembly M4735 69552 Display Assembly 2090 0803 Serial Number Defibrillator Capaci M3500 69564 Defibrillator Capaci 010879 0004 Serial Number and tor Assembly tor Date Code AC Power Module M4735 66020 AC Power Module M4735 60020 Date Code Energy Select M4735 69564 Switch Assembly M4735 60018 Date Code Switch Assembly MECHANICAL ASSEMBLIES Bezel Assembly Main Keypad Switch M4735 60200 Date Code English M4735 69400 ern French M4735 69401 German M4735 69402 Dutch M4735 69403 Spanish M4735 69404 Italian M4735 69405 Swedish M4735 69406 Norwegian M4735 69408 Finnish M4735 69409
176. rms it It does not deliver the energy outside the unit The pads cable and test load must be connected for the test to run otherwise the test result will be Not Tested The Front End FE test checks that the main processor is communicating with the Digital Signal Processor DSP and that the DSP is communicating with both ECG front ends pads and leads It does not test the quality of the ECG measurement e SP02 if SpO option installed This tests that communication with the SpO PCA is working It does this by reading the software revision back from the PCA It does not test the quality of the SpO measurement e Pacer if Pacing option installed The Pacer test has the Pacer deliver current into the test box and measures that the current delivered was what was expected The pads cable and test load must be connected for the test to run otherwise the test result will be Not Tested 2 24 Performance Verification and Safety Tests M4735A Service Manual Performance Verification User Interface Tests The User Interface Tests exercise the functions that interact with the user Each of the User Interface tests assumes the unit and the simulator are still set up as they were at the end of the previous User Interface check If all results are as described the unit passes that test Return to the main Diagnostic Test menu by pressing MAIN If there is any failure begin troubleshooting and repairing the unit as needed See
177. rnal Paddles 4 5 cm Switchless M1743A 4 5 cm Switchless M1743A Date Code Internal Paddles Internal Paddles 2 8 cm Switchless M1744A 2 8 cm Switchless M1744A Date Code Internal Paddles Internal Paddles 7 5 cm Switched M4741A 7 5 cm Switched M4741A Date Code Internal Paddles Internal Paddles 6 5 cm Switched M4742A 6 5 cm Switched M4742A Date Code Internal Paddles Internal Paddles 4 5 cm Switched M4743A 4 5 cm Switched M4743A Date Code Internal Paddles Internal Paddles 2 8 cm Switched M4744A 2 8 cm Switched M4744A Date Code Internal Paddles Internal Paddles Internal Paddles M4740A Internal Paddles M4740 61601 Date Code Adapter Cable Adapter Cable Pads Cables Agilent Pads M3507A Agilent Pads M3507A Date Code Adapter Cable Adapter Cable Heartstream Pads M3508A Heartstream Pads M3508A Date Code Connector Cable Connector Cable Battery Adapter Sealed Lead Acid M3516A Sealed Lead Acid 1420 0561 Date Code Battery Battery Battery Charger Kit M4747A Sealed Lead Acid 1420 0561 Date Code Battery Charger Battery Adapter AC Power Module Battery AC Power Module M3517 60000 Date Code 5 24 Replacement Parts 6 Theory of Operation Overview This chapter describes the internal operation of the M4735A This description is at the functional block level The information is presented in two ways e PCA Descriptions For each Printed Circuit Assembly PCA a description of the major functions performed on that PCA e System Functional Descr
178. rol PCA Power PCA Single Wire to Keyscan PCA 4238 o Removal and Replacement Opening the Case 9 Lay the top case flat on the work surface Lay the top case on the work surface upside down and next to the bottom case section See Figure 4 17 Figure 4 17 Case Opened Flat Bottom Case Top Case M4735A Service Manual 4 29 Opening the Case WARNING WARNING 4 30 Discharge the Defibrillator Capacitor The steps that follow describe two methods of discharging the unit s Defibril lator Capacitor Always employ the Primary Method as it will work in most cases If there are any doubts the Secondary Method should also be used Always discharge the defibrillator capacitor before servicing this unit To avoid completing a high voltage circuit use only one hand to perform the following steps Keep the other hand away from the unit at all times Touch only the parts described 1 Lift the capacitor out of the way Lift up the defibrillator capacitor together with its foam base Lift straight up then turn the capacitor to the right and rest it on the Power PCA See Figure 4 18 2 Inspect the Disarm Pathway Look for signs of arcing or burning damage to the resistors or inductor blown traces on the Power PCA etc TIP The Disarm Pathway is located under the Defibrillator Capacitor on the left side of the Power PCA The Disarm Pathway consists of 2 large power resistors Disarm Resistors a red inductor an
179. rvicing Notes Following are some important points to keep in mind whenever servicing the M4735A Key Components Replacement assemblies marked with an asterisk in the Replacement Parts tables contain one or more Key Components Key Components require detailed tracking by recording the key component part number and either the key component s date code or its serial number This data must be recorded for both the failed assembly and the replacement assembly Agilent Technologies service personnel must record this information on the Customer Service Order CSO The Key Components that are part of the replacement assemblies are listed in Table 5 17 on page 5 21 4 1 6 29 00 Servicing Notes 4 2 Removal Handling and Replacement The following sections give details of how to successfully work with the internal assemblies of the M4735A Flex Circuit Connections In order for flex circuit connections to function properly they must be discon nected and reconnected as follows e Always unlatch the PCA mounted connector before removing the flex circuit and hold the latch open while reinserting the flex circuit into the connector e When reconnecting align the flex circuit carefully in its receptacle making sure it is both centered from side to side in the connector and oriented at 90 degrees to the connector e Be sure the flex circuit is fully seated in the connector and the con nector is properly latched
180. s p running auaiting trigger VERTICAL remote talk 10 0 mv div position mv im BH lim LF rej 8 0000 ms 16 0000 ms 2 00 ms div realtime 2 0000 ms preset more probe This image displays the defibrillator current waveform for a 200 discharge into 500hms The current probe is set to 10A div 10A 10mV The peak current is about 37A M4735A Service Manual 7 11 Waveforms 200J continued NENNEN Waveforms 200J continued 200J 75ohms p running auaiting trigger VERTICAL remote talk 10 0 mv div position 10 0000 mV dc ac BH lim LF rej 8 0000 ms 18 0000 ms 2 00 ms div realtime 2 0000 ms preset probe more This image displays the defibrillator current waveform for a 200 discharge into 75ohms The current probe is set to 10A div 10A 10mV The peak current is about 25A 200J 1000hms 4e running aHaiting trigger VERTICAL remote talk 10 0 mv div position 10 0000 mV 18 0000 ms realtime 8 0000 ms 2 00 ms div 2 0000 ms This image displays the defibrillator current waveform for a 200 discharge into 100ohms The current probe is set to 10A div 10A 10mV The peak current is about 20A 7 12 Specifications Waveforms 200J continued Waveforms 200J continued 200J 125ohms 2ms div Ap running auaiting trigger HORIZONTAL remote talk 2 00 ms div i i 25 kSa s 10 0000 ms referen
181. s Top Case Replacement 1 Replace the IrDA break off PCA If the IIDA PCA was removed replace it now a b c Connect the cable to the IrDA PCA Place the IrDA PCA in position inside the top case Replace the 2 screws 2 Connect the 3 individual wires to the Keyscan PCA a Connect the longest wire to the spade connector at the lower left edge of the PCA This wire has spade receptacles on both ends Connect the other 2 wires to the spade connectors at opposite side edges of the PCA on either end of the power resistors These wires have ring terminals on their other ends 3 Install the Keyscan PCA a c Align the bottom edge of the PCA with the mating slots in the case Note that there is a also slot in the PCA which must line up with a rib on the case See Figure 4 24 As you lay the PCA against the threaded standoffs guide the 2 dis play ribbon cables through the window in the Keyscan PCA Replace the 2 T10 screws and tighten 4 Reconnect the Keyscan PCA a Connectthe 2 paddle wires to the paddles pockets Replace the 2 T10 screws and tighten b Connectthe 2 display ribbon cables Latch the larger one in position Be sure the smaller one is fully inserted in its connection c Connectthe Energy Select Switch Be sure the connector latches into position securely d Connect the IrDA break off PCA e Connect the 4 keypad flex circuits Have the latching top of the con nector up th
182. s on the latch to release it c Disconnect the cable at the opposite end of the PCA connects to the ECG Connector Press on the latch to release the connector d Disconnect the flex circuit connects to the SpO PCA Unlatch the brown receptacle on the PCA by pulling on the top of the receptacle then slide out the flex circuit 2 Remove the Parameter PCA a Unscrew the T10 screw located near the large ribbon connector b Lift the PCA out of the case Replacement 1 Replace the Parameter PCA a Connect the SpO flex circuit Slide the flex circuit into place then latch the receptacle by pushing in on the top of the receptacle b Lay the Parameter PCA in position in the top case The PCA fits between ribs in the case on all 4 corners c Replace the T10 screw near the large ribbon connector 4 56 Removal and Replacement Internal Assemblies Top Case 2 Connect the Parameter PCA a Connect the ECG Connector cable Be sure the connection latches b Connect the large ribbon cable connects to the Control PCA c Connect the small 3 pin connector next to the ribbon cable Figure 4 29 Removing the Parameter PCA Ribbon Cable to ECG Out Sync Control PCA Connector SpO5 Connector Cable to ECG Connector Flex Circuit to SpOs Connector Parameter PCA After Repair After repairs are complete perform the following steps 1 Replace and connect the SpO PCA See SpO2 PCA on page 4 58 2 Restore the c
183. s serial number e If this is an SpO upgrade the serial number should already be present In this case verify it against the factory applied label on the bottom of the case e If this is a Control PCA replacement program in the serial num ber found on the factory applied label on the bottom of the case using the softkeys as instructed on the screen Be sure to program it in accurately as the serial number is used for all repair history tracking c Check all the displayed information carefully before proceeding e If the displayed information is correct follow the screen prompts to save the configuration Performance Verification and Safety Tests The Software Support Tool e If any of the information is incorrect follow the prompts to NOT save the configuration then start over by powering the unit off then back on 3 Turn off the power and remove the Data Card 4 Check the customer configuration a Turn the unit back on and enter Configuration Mode see Configura tion Mode on page 2 10 b Print the configuration and check it against the printout from before the servicing began Reset the configuration or load it from a Data Card as needed 5 Verify performance Perform Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 2 13 Performance Verification 2 14 Performance Verification This section gives instru
184. so lation barrier before being passed to the Control PCA via a large ribbon cable The Control PCA then performs digital signal processing on the ECG data and is responsible for e ECG waveform analysis and Shock Advisory in AED Mode e Formatting and presenting the ECG to the display and to the printer e Counting heart rate and generating heart rate alarms e Reporting on the status of the patient connection ECG 3 5 lead cable The ECG signal picked up by the ECG monitoring electrodes is carried by the ECG cable to the ECG connector and then to the Parameter PCA There it is amplified filtered and digitized before being passed to the Control PCA via a large ribbon cable The Control PCA then performs digital signal processing on the ECG data and is responsible for e Formatting and presenting the ECG to the display and to the printer e Counting heart rate and generating heart rate alarms e Reporting on the status of the patient connection and alerting the user to measurement problems Patient impedance functions The M4735A measures patient impedance in 2 ways an impedance measure ment before the shock and a resistance measurement during the shock Before the Shock The M4735A makes a small signal AC impedance measurement at 32 KHz in the steady state situation before a shock is delivered This measurement is used to determine whether the pads are connected to the patient or not or the paddles are making good
185. stabilize The displayed value should be 1000 10 100 Record this as aaaa Connect the ECG simulator to the ECG leads cable Following the instructions under Step 3 on page 2 30 for chang ing settings set Selected lead to Lead Il Wait for the displayed value under Diagnostic to stabilize The displayed value should be 1000 10 100 Record this as bbbb b Perform the amplifier noise test 1 M4735A Service Manual Turn the simulator off Leave it connected to the ECG cable and leave Selected lead set to Lead Il Wait for the displayed value under Diagnostic to stabilize The displayed value should be 0 30 uV Record this as cc If the unit exhibits more than 30 uV of noise try repositioning the cable or unit to minimize external interference Also try various combinations of having the ECG simulator turned on or off and Gf applicable whether the simulator is plugged into the AC mains Refer to Chapter 7 for more information about reducing electromagnetic interference Following the instructions under Step 3 on page 2 30 for chang ing settings set Selected lead to Pads Connect the simulator to the pads cable Wait for the displayed value under Monitor to stabilize The displayed value should be 0 30 uV Record this as dd 2 31 Performance Verification 2 32 Test the PCI function This test checks the PCI Patient Contact Indicator function The PCI measurement is used to d
186. stet eni este at esee t ete pecho oes tei e e EN Ee eb E ee HE EDU Eve debo e 1 2 Pista WALI ERR 1 2 MS ace esie Men era eee E Dn RNC NUN 1 2 Preventive Maintenance 0 ceeeeeceeecccccccesccccccscececcecceccccssceccacseececssceceaaseceeauuceeeaneeeeees 1 2 Repair Philosophy sireisas isea a lud odisvidem iain i Mie edd dpa us 1 3 Performance Verification and Safety Tests OVETVIEW PC EES 2 1 Chapter Contents o P 2 1 Manidatary iE a winnie whoa E E E EETA 2 2 External Repairs No Trouble Found os secseccesscgaccestocenaciusceseccusgetecseetavanupassanedacestedeqoezsaiuge 2 2 gel 2 3 Mi roii MT 2 3 Ed iu CE 2 4 Test TUM eats ad areia c eMe teat urea ioi saut utu has diei E 2 8 Configuration and Diagnostic Modes 4o oie tt RN e tede RR RE EVI NAR LER NUMEN CU RMRS 2 10 Configuration Mode T S 2 10 Diagnostic Mode Nc IO 2 11 Th Software Support TOOL dense edi beu IRR ON ARR a discos pane Qua aes 2 12 Using the Support TOO ode otro ein teeta bei iota niiina sisiane 2 12 Performance Verification assebsesessiiadipettvquthitensta e imd nasta oin mene 2 14 Mistal Inspection M 2 15 F nctonal Checks T EN 2 16 WAS TEStS aT 2 19 Jpalco mem aa 2 39 Battery Cap
187. t the small 2 wire connector at the front edge of the PCA connects to the speaker This connector has a latch on the top push down on the latch to release it and wiggle the connector side to side to pull it out Disconnect the large ribbon cable on the right side of the Control PCA connects to the Keyscan PCA Removal and Replacement Internal Assemblies Top Case Figure 4 20 Control PCA Connections Ribbon Cable to Printer Ribbon Cable to Power PCA Ribbon Cable to Parameter PCA 2 Wire Cable to Speaker Lithium Battery Ribbon Cable to Under Cable Keyscan PCA M4735A Service Manual 4 37 Internal Assemblies Top Case 2 Remove the screws a Remove the 8 screws around the edges of the Control PCA See Fig ure 4 21 on page 4 38 b Remove the 1 screw near the center of the PCA Be careful not to damage any nearby components or traces 3 Remove the Control PCA a Move the Control PCA toward the rear while lifting it off the metal shield plate This will help the Eject button clear its hole in the black plastic shield surrounding the Data Card receptacle NOTE If the black plastic shield is damaged remove it otherwise leave it in place on the metal shield plate If you are replacing the Control PCA the new PCA comes with a new plastic shield b Leavethe lithium backup battery in place when returning the PCA for repair This will help preserve information for factory troubleshoot ing
188. ta is being recorded on the Data Card because the Data Card was removed during an incident Remove card turn power off insert card turn power on Data Card Not In Ser vice No data is being recorded on the Data Card because the Data Card was inserted while the M4735A was on None A Data Card must be inserted prior to turning the M4735A on for the current patient Incompatihle Data Card No data is being recorded on the Data Card because a Data Card other than the M3510A is inserted Use only M3510A Data Cards No Data Card Present A Data Card is not in the M4735A Turn the M4735A off and insert a Data Card prior to the first event for the patient Key Inactive The key pressed is currently inactive i e is inactive in AED Mode Use the appropriate mode for the key Stop Pacer is pressed while pacing pulses are being delivered Stop pacing before changing the pacing mode M4735A Service Manual 3 15 General Problems Audio Tones The M4735A emits tones to alert you to its status NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Table 3 5 Audio Tones Tone At power on a low tone of approx 1 second followed by a series of higher pitched short tones Meaning Normal power on sequence Suggested Action None needed At power on a
189. ted Patient Applied Part is isolated and defib proof suitable for direct patient contact except the heart or major arteries Meets IEC type CF leakage current requirements and is defibrillator protected Patient Applied Part is isolated and defib proof suitable for direct patient contact including the heart and major arteries Alarms are active Alarms are inactive Recyclable material Must be recycled or disposed of properly Unlock Audio speaker Protective earth ground Alternating current wil DA TPX pa Dangerous Voltage Specifications Symbol Definitions The following table lists the symbols that appear on the M4735A shipping carton Table 7 3 Shipping Carton Symbols Symbol Definition edi Atmospheric pressure range Temperature range Relative humidity range N Recyclable paper product E Fragile t t Right side up ai Do not get wet Shelf life Long term storage conditions Short term transport storage pen M4735A Service Manual 7 15 Safety Considerations WARNING WARNING WARNING WARNING WARNING WARNING WARNING Safety Considerations The following general warnings and cautions apply to use of the Heartstream XL Additional warning and cautions specific to a particular feature are provided in the appropriate section The
190. tems marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 M4735A Service Manual 5 13 Labels 5 14 Labels The labels used on the M4735A are divided into 4 groups the Instruction Label Set the Case Label Set the Branding Label Set and the Speaker Label Each set of labels is one sheet containing all the labels in that set For details of which label is part of which set see Labels on page 4 20 Instruction Label Sets The Instruction Label Set is available for units both with and without pacing in the following supported languages See Figure 4 10 on page 4 21 for cor rect placement of these labels Table 5 11 Instruction Label Sets Without Pacing Language Part Number English M4735 69600 French M4735 69601 German M4735 69602 Dutch M4735 69603 Spanish M4735 69604 Italian M4735 69605 Swedish M4735 69606 Norwegian M4735 69608 Finnish M4735 69609 Chinese M4735 69611 Portuguese M4735 69613 Russian M4735 69614 Polish M4735 69619 Items marked with an asterisk contain Key Components which require tracking See Table 5 17 on page 5 21 Replacement Parts M4735A Service Manual Table 5 12 Instruction Label Sets With Pacing Labels Language Part Number English M4735 69700 French M4735 69701 German M4735 69702 Dutch M4735 69703 Spanish
191. test 2 23 Reassembly 4 2 Repair philosophy 1 3 Replacement connectors 5 12 electrical assemblies 5 7 Key Components 5 2 5 21 M3500B Unit Exchange Program 5 5 mechanical assemblies and parts 5 10 ordering 5 1 special tools 5 4 subassembly 1 3 supplies and accessories 5 1 5 18 tables 5 6 RF interference 7 19 ROM test 2 23 Safety tests 2 7 2 39 Sealed Lead Acid SLA battery See Battery Selected lead 2 30 Semi Automatic External Defibrillation AED Mode 1 1 3 21 7 3 Sensor SpO2 5 19 Servicing cable assembly placement 4 2 flex internal connections 4 2 instrumentreassembly 4 2 Key Components 4 1 telephone assistance 3 3 5 3 Shock Advisory functional check 2 17 Softkey numbering 2 11 operational problems 3 28 testing 2 25 Software Support Tool 2 12 Speaker assembly 4 64 5 8 labels 5 17 SpO2 monitor 6 8 connector 4 62 5 12 functional check 2 18 operational problems 3 20 sensors 5 19 specifications 7 6 SpO2 Cable Off 3 13 SpO2 Light Interf 3 13 SpO2 Low Noisy Signal 3 13 SpO2 Sensor Fail 3 13 SpO2 PCA 6 4 replacement 4 58 5 8 test 2 24 Status message 2 30 Stop Pacer 3 15 Subassembly replacement 1 3 Supplies 5 1 5 18 Symbol definitions 7 14 Synchronized Cardioversion functional checks 2 18 operational problems 3 21 Synchronizer 7 2 System error codes 3 4 3 5 3 10 interconnections 6 5 messages 3 12 signal and data flow 6 6 System Log 2 20 test 2 23 System Failure
192. the desired test or function To select a test press the A and W softkeys to move up or down the list until the desired test is highlighted Then press the ENTER softkey to start that test 5 Exit Diagnostic Mode To exit Diagnostic Mode turn the unit off 2 11 The Software Support Tool The Software Support Tool The Software Support Tool M4735 87890 allows field service personnel to perform 2 tasks 1 to enable the SpO option and 2 to program in the serial number These tasks need to be performed under the following circum stances e The Control PCA has been replaced The Control PCA contains all the operating software configured for the installed hardware It also contains the unit s serial number which was programmed in during manufacturing The new Control PCA must be programmed to recognize the hardware installed in this unit and to contain that unit s serial number e The unit has received an upgrade adding the SpO capability The added hardware will not be automatically recognized The Control PCA must be programmed to recognize the new hardware installed Using the Support Tool 1 Prepare the unit a Haveunit power off and have either a fresh battery installed or the AC power cord plugged in b Insert the Support Tool data card into the unit c Turnunit power on 2 Follow the screen prompts a Select whether SpO hardware is installed or not as appropriate b Program in the unit
193. the new connector through the new O ring that came with the connector Seat the O ring on the connector b Insert the wires through the hole in the case and then through the metal plate Finally guide them though the large nut Use the existing nut and plate c Align the flat section on the connector with the flat portion of the case hole d Push the connector into the hole seating the O ring into the recess in the case e Tighten the large nut snugly but not excessively the goal is to com press the O ring not crush it hard against the case M4735A Service Manual 4 95 Internal Assemblies Bottom Case 2 Connect the Patient Connector to the Power PCA a Connect the 9 pin connector be sure it latches b Connect the 2 High Voltage spade connectors by pushing straight down with a needle nose pliers After Repair After repairs are complete perform the following steps 1 Reassemble the case See Closing the Case on page 4 99 2 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 3 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 96 Removal and Replacement M4735A Service Manual Internal Assemblies Bottom Case Replacement Bottom Case The following sections describe how to
194. the supported languages See Table 5 6 on page 5 10 for part numbers Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete Open the case safely See Opening the Case on page 4 24 Disconnect and remove the Control PCA See Control PCA on page 4 36 Remove the Shield Plate See Shield Plate on page 4 40 Disconnect and remove the Keyscan PCA See Keyscan PCA on page 4 42 Removal 1 3 4 48 Unscrew the 2 threaded standoffs Using a pliers or wrench loosen the 2 standoffs and remove them See Figure 4 26 on page 4 49 Release the 6 locking clips Release each of the 6 locking clips inside the case by pulling up toward you until the clip unlatches from its mating case tab TIP Unlatch the 2 clips nearest you first below the IrDA PCA and below the speaker Then pivot the Bezel Assembly out from the case and release the 4 clips along the other edge of the Bezel Assembly Lift the Bezel Assembly off the front of the case Removal and Replacement Internal Assemblies Top Case Figure 4 26 Removing the Bezel Assembly Mating Case Tab 6 total Locking Clip on Bezel 6 total Threaded Standoffs 4 Remove the Energy Select knob and switch OPTIONAL If the Bezel Assembly is being replaced also remove the Energy Select knob and switch
195. tion b Replace the washer and nut on the connector and tighten the nut c Connectthe 3 pin connector to the Parameter PCA Be sure it latches in place After Repair After repairs are complete perform the following steps 1 Restore the customer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 2 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 4 68 Removal and Replacement Internal Assemblies Top Case ECG Out Sync Connector The ECG Out Sync Connector is located at the rear of the top case next to the SpO connector It is part of one assembly with the AC Mains connector For Removal and Replacement procedures see AC Mains Connector on page 4 66 M4735A Service Manual 4 69 Internal Assemblies Top Case Pacer Keypad The following sections describe how to remove and replace the Pacer Keypad Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 3 Disconnect and remove the Control PCA See Control PCA on page 4 36 4 Remove the Shield Plate See Shield Plate on page 4 40
196. to Battery PCA Battery Connector M4735A Service Manual 4 87 Internal Assemblies Bottom Case 5 Remove the Power PCA a Remove the 6 T10 size screws from the Power PCA b Pullthe Power PCA up and guide it around the Patient Connector and the case post TIP Lift the back edge of the PCA nearest the AC Power Module first Then guide the PCA out to the right to clear the Patient Connector and the case post and lift the PCA clear of the case WARNING Leave the shield in place in the bottom case under the Power PCA Be careful not to cut or puncture the shield Figure 4 43 Removing he Power PCA Power PCA Shield 488000 0 6 6 lt O Removal and Replacement M4735A Service Manual Internal Assemblies Bottom Case Replacement 1 Replace the Power PCA a Ensure the shield is still in its proper position in the bottom case a Guide the Power PCA into position under the Patient Connector b Replace the 6 T10 screws and tighten See Figure 4 42 on page 4 87 2 Connect the Control PCA ribbon cable Connect the large ribbon cable Its other end will still be disconnected from the Control PCA 3 Connect the AC Power Module a Connect the 2 pin in line connector to the Battery PCA be sure it latches b Connect the 6 pin connector to the Power PCA be sure it latches c Connect the 4 pin connector to the Power PCA be sure it latches 4 Connect the Battery PCA to the Power PCA a
197. uits are properly connected See Servicing Notes on page 4 1 Table 3 10 Operational Problems Pacing Message or Symptom Doesn t deliver correct current into Pacer Tester or delivers no current at all Possible Causes Control PCA failure Power PCA failure Suggested solution Replace Control PCA Replace Power PCA Doesn t measure its own delivered current correctly Power PCA failure Control PCA failure Replace Power PCA Replace Control PCA Doesn t pace at correct rate Control PCA failure Replace Control PCA Pacer hardware not installed mes sage even though Pacer is present Bad connections Manual Keypad flex circuits to Keyscan PCA Reconnect flex circuits properly See Servicing Notes on page 4 1 3 24 Troubleshooting Printer The following table covers problems that might arise while printing Operational Problems NOTE Before replacing any parts check to see if the cables and flex circuits are properly connected See Servicing Notes on page 4 1 Also check for damage to the printer ribbon cable where the ribbon is cap tured in the connectors Table 3 11 Operational Problems Printer Symptom Paper won t move Possible Causes Paper improperly loaded or jammed or paper is wet Printer failure Suggested solution Reload paper or clear jam If paper is wet replace with fresh dry roll Repla
198. ure Parameter PCA failure SHOCK key failure Suggested solution Diagnose as follows 1 In Diagnostic Mode run Controls Test and test SHOCK key Key tests OK Replace Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA Charges but disarms when press Shock Patient impedance sensed as too high or too low during energy deliv ery due to Pads losing contact with patient Pads failure Pads cable failure Power PCA failure Control PCA failure Replace paddles or pads and pads cable Replace Power PCA Replace Control PCA Charges but disarms spontane ously 1 Unit sensed Pads Off or Cable Off due to Pads losing contact with patient Pads failure Pads cable failure Power PCA failure Control PCA failure Parameter PCA failure 2 DISARM key failure intermittent Replace paddles or pads and pads cable Diagnose further as follows In Diagnostic Mode run Controls Test and test DISARM key Key tests OK Replace 1 Power PCA 2 Control PCA Key not OK Replace 1 Keyscan PCA 2 Bezel Assembly 3 Control PCA Charges slowly about 4 5 sec instead of 2 3 sec Battery too old or not fully charged Unit senses unsupported battery due to Unsupported battery in use Battery PCA failure Power PCA failure Control PCA failure Replace with new fully charged bat tery Also run
199. ure 4 10 and Figure 4 11 for locations of these labels Removal and Replacement External Assemblies Figure 4 10 Instruction Label and Case Label Locations Connector Label nstruction Label Printer Label Patient Connector Label Eject Data Card Label Blank Label M4735A Service Manual 4 21 External Assemblies Speaker Label 4 22 Branding Label Set Branding labels include e Agilent label e Heartstream label Both of these are located on the handle They do not have language localiza tion See Figure 4 12 for locations Figure 4 12 Branding and Speaker Lahel Locations Agilent Label Heartstream Label Speaker Label Set The speaker label cover seals the speaker grille and is designed to provide good sound transmission It consists of a raised circular area surrounded by a gray rectangle See Figure 4 12 for location Removing and Replacing Labels The following sections describe how to remove and replace any of the labels described earlier Removal 1 Start at one corner Removal and Replacement M4735A Service Manual External Assemblies Using a sharp tool such as a utility knife pick up one corner of the label 2 Peelup the label Peel the label up by pulling slowly and evenly on the loosened corner Figure 4 13 Removing the Speaker Label J d Energy Select Knob IEEE Tf LZ j Speaker Label Replacement 1 Clean the surface a Remove any adhesiv
200. ustomer s configuration Enter Configuration Mode and reload the customer s configuration from the data card or reconfigure the unit See Configuration Mode on page 2 10 3 Test performance Conduct Performance Verification Testing as described in Performance Verification and Safety Tests starting on page 2 1 M4735A Service Manual 4 57 Internal Assemblies Top Case The SpO PCA is located in the top case in behind the printer bucket It is mounted on top of the Parameter PCA The following sections describe how to remove and replace the SpO PCA CAUTION See cautions regarding handling and connection of flex circuits on page 4 1 Preparation 1 Save the configuration If possible save the customer s configuration onto a Data Card or print the configuration so the configuration can be restored after the repair is complete 2 Open the case safely See Opening the Case on page 4 24 Removal 1 Disconnect the SpO PCA a Disconnect the flex circuit to the SpO connector There is no latch pull straight out from the PCA connector See Figure 4 30 on page 4 59 b Disconnect the flex circuit to the SpO PCA Unlatch the brown receptacle on the PCA by pulling on the top of the receptacle then slide out the flex circuit 2 Remove the SpO PCA a Remove the 2 long T10 screws See Figure 4 30 on page 4 59 b Liftthe PCA out of the case Replacement 1 Replace the SpO PCA Lower the PCA into positi
201. vice For assistance call the Response Center nearest to you or visit our website at www agilent com healthcare United States of America Medical Response Center Tel 800 548 8833 Canada Eastern Region Central amp Western Regions Tel 800 361 9790 Tel 800 268 1221 Other International Areas Australia France Tel 131147 Tel 0803 35 34 33 Germany Italy Tel 0130 4730 Tel 0292 122999 Netherlands United Kingdom Tel 0 20 547 6333 Tel 44 344 36633 Belgium Tel 32 2 778 35 81 5 3 Special Tools 5 4 Special Tools The following special tools are available for purchase from Agilent Technolo gies at the replacement parts numbers given above Torx driver kit Tool Part Number 5181 1933 High voltage discharge tool M2475 69572 Software Support Tool M4735 87890 Replacement Parts M4735A Unit Exchange Program M4735A Unit Exchange Program For customers taking advantage of the M4735A Unit Exchange program the following are notes on logistics and a list of the available Exchange Units Logistics e Agilent ships a replacement unit to the customer This unit does NOT include paddles cables sensors accessories battery data card or consumables e Customer takes the exchange unit out of the box tests it and puts it into service e Cust
202. will expose the spring loaded shaft on which the door pivots 2 Compress the shaft a Usinga small flat bladed screwdriver catch the left end of the pivot shaft and slide it toward the center compressing the spring b When the spring is compressed enough the pivot shaft will pop easily out of its hole in the bottom case 3 Remove the door Figure 4 7 Removing the Data Card Door Data Card Door Pivot Shaft Spring EOSS Removal and Replacement External Assemblies Replacement 1 Check the mating holes Check to be sure the pivot holes in the case have not been damaged If they have been the Bottom Case Assembly must be replaced 2 Insert the door TIP The new door comes complete with the black latch the pivot shaft and the spring already installed in the door a Insert the right end of the pivot shaft into its hole in the case b Pushin the left end to compress the spring then slide the left end into place Be sure the shaft snaps into position c Check to be sure the door moves freely latches securely and springs open when unlatched After Repair Conduct Performance Verification Testing as described in Performance Veri fication and Safety Tests starting on page 2 1 Energy Select Knob The following sections describe how to remove and replace the Energy Select Knob Removal Remove the Energy Select Knob Grasp the knob and pull straight out from the Front Bezel TIP To get a bette

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