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Philips M4735A HeartStart XL Service Manual

Defibrillator/monitor
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H E A R T S TA R T X L
S e r v i c e M a n u a l
M 4 7 3 5 A

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  Summary of Contents for Philips M4735A HeartStart XL

  • Page 1 H E A R T S TA R T X L S e r v i c e M a n u a l M 4 7 3 5 A...
  • Page 3 Service Manual M4735A HeartStart XL Defibrillator/Monitor...
  • Page 4 Main 16 and earlier This information is THIS PRODUCT IS NOT INTENDED subject to change without notice. FOR HOME USE. Philips shall not be liable for errors con- IN THE U.S., FEDERAL LAW tained herein or for incidental or conse- RESTRICTS THIS DEVICE TO SALE...
  • Page 5 Conventions This manual uses the following text conventions: Printed and On-Line Warning statements describe conditions or actions that can result in personal injury WARNING or loss of life. CAUTION Caution statements describe conditions or actions that can result in damage to the equipment or loss of data.
  • Page 7: Table Of Contents

    Contents Introduction Overview ........................1-1 Web-Based Training ....................... 1-1 Defibrillator/Monitor ...................... 1-1 Batteries .......................... 1-2 Installation ........................1-2 Upgrades ......................... 1-2 Preventive Maintenance ....................1-2 Repair Philosophy ......................1-3 Performance Verification and Safety Tests Overview ......................... 2-1 Chapter Contents ......................2-1 Required Testing Levels .....................2-2 External Repairs/No Trouble Found ................
  • Page 8 Contents Troubleshoot .......................3-5 System Errors ........................3-5 Repair .........................3-6 Check the repair ......................3-6 Verify ..........................3-7 Troubleshooting Tables ....................3-8 Using the Tables ......................3-8 General Problems .......................3-9 Unit Unresponsive ......................3-9 Error Codes ........................3-10 System Messages ......................3-12 Momentary Messages ....................3-15 Audio Tones ........................
  • Page 9 Contents External Assemblies ....................4-4 User Replaceable Parts and Accessories ................. 4-5 User Maintenance ......................4-5 Printer Assembly ......................4-6 Battery Cover ........................ 4-10 Main Fuse ........................4-12 Battery Eject Assembly ....................4-14 Data Card Door ......................4-16 Energy Select Knob ....................4-17 Paddle Holders ......................
  • Page 10 Contents Replacement Parts Overview ......................... 5-1 Chapter Contents ......................5-1 Ordering Replacement Parts ..................5-1 Ordering Supplies and Accessories ................5-1 Key Components ......................5-2 Calling for Service .....................5-3 United States of America ....................5-3 Latin America ......................... 5-3 Canada ..........................5-3 Other International Areas ....................
  • Page 11 Contents Theory of Operation Overview ........................6-1 PCA Descriptions .......................6-2 Control PCA ........................6-2 Power PCA ........................6-3 Parameter PCA ....................... 6-3 Keyscan PCA ........................6-3 SpO2 PCA ........................6-4 Battery PCA ........................6-4 Battery ..........................6-4 Power Supply ........................6-4 Printer ..........................
  • Page 12 Contents Specifications Overview ......................... 7-1 Specifications ......................7-1 Defibrillator ........................7-1 ECG Monitoring ......................7-3 Display ..........................7-4 Battery ..........................7-4 Thermal Array Printer ..................... 7-5 Noninvasive Pacing ......................7-6 SpO2/Pulse Oximetry ..................... 7-6 Event Storage ........................7-6 General ..........................7-7 Environmental .........................
  • Page 13: Overview

    Introduction This Service Manual provides the information needed to successfully service the M4735A HeartStart XL Defibrillator/Monitor. The intended users of this manual 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 familiar with before servicing the M4735A.
  • Page 14: Batteries

    Overview 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 also enables you to store data and events on an optional M3510A Data Card for downloading to the Event Review Data Management System.
  • Page 15: Repair Philosophy

    Overview Repair Philosophy Defibrillator/Monitor The repair philosophy of the M4735A 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. Individual component replacement should not be attempted outside of a fac- CAUTION tory authorized repair facility.
  • Page 17: Performance Verification And Safety Tests

    Performance Verification and Safety Tests Overview This chapter describes the tests and inspections required to verify performance of the M4735A Portable Defibrillator/Monitor. Chapter Contents The major sections of this chapter are as follows: Section Page Required Testing Levels Test and Inspection Matrix Test Equipment 2-10 Configuration and Diagnostic Modes...
  • Page 18: Required Testing Levels

    Required Testing Levels Required Testing Levels The Performance Verification Tests in this chapter are intended to verify proper operation of the M4735A following repair. The level of testing required corresponds to the type of repair performed, and is divided into 3 categories: External Repairs/No Trouble Found.
  • Page 19: Printer

    Required Testing Levels Printer If the printer was replaced, and the case was not opened, the following tests are required: Perform the Visual Inspection (page 2-16). Run the Extended Self Test (page 2-25). Run the Printer Test (page 2-30). Print and Verify the System Log (page 2-23). Internal Repairs If the case was opened (regardless of what the repair involved), all of the Performance Verification Tests must be performed, beginning with "Visual...
  • Page 20: Test And Inspection Matrix

    Test and Inspection Matrix Test and Inspection Matrix Table 2-1 summarizes performance verification tests and inspections for the M4735A; including test name, test or inspection to perform, expected test results, and data to record. Table 2-1 Performance Verification and Safety Tests Test or Inspection to Data to Record Test Group Name...
  • Page 21 Test and Inspection Matrix Table 2-1 Performance Verification and Safety Tests (Continued) Test or Inspection to Data to Record Test Group Name Expected Test Results Perform x = p (pass) or f(fail) If all data within limits, all User Interface •...
  • Page 22 Test and Inspection Matrix Table 2-1 Performance Verification and Safety Tests (Continued) Test or Inspection to Data to Record Test Group Name Expected Test Results Perform x = p (pass) or f(fail) All data within limits, all Pacing Test (P) In Diagnostic Mode, run checks pass: x=p Example: P:p...
  • Page 23 Test and Inspection Matrix Table 2-1 Performance Verification and Safety Tests (Continued) Test or Inspection to Data to Record Test Group Name Expected Test Results Perform x = p (pass) or f(fail) All data within limits, all DB:x Defibrillator Test - Using only battery power, checks pass: x=p Example: DB:p...
  • Page 24 Test and Inspection Matrix Table 2-1 Performance Verification and Safety Tests (Continued) Test or Inspection to Data to Record Test Group Name Expected Test Results Perform x = p (pass) or f(fail) Note: All leakage current Safety Tests Indicate test results as tests include both Normal follows: and Reverse Polarity Condi-...
  • Page 25 Test and Inspection Matrix Table 2-1 Performance Verification and Safety Tests (Continued) Test or Inspection to Data to Record Test Group Name Expected Test Results Perform x = p (pass) or f(fail) If readings are as expected: External Paddles/Pads • Source <...
  • Page 26: Test Equipment

    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 50 ohm test load is available (M1781A or M3725A). Table 2-2 Equipment List Equipment/Test Specifications...
  • Page 27: Configuration And Diagnostic Modes

    Configuration and Diagnostic Modes Configuration and Diagnostic Modes The instructions below describe how to enter Configuration Mode and Diagnostic Mode. Configuration Mode These instructions describe briefly how to use Configuration Mode. See the Instructions for Use for details on configuration settings and what effect they have.
  • Page 28: Diagnostic Mode

    Configuration and Diagnostic Modes Exit Configuration Mode. To exit Configuration Mode, turn the unit off. Wait 2 seconds. Remove the Data Card by pressing the black eject button and pulling the Data Card from the compartment. Figure 2-1 Softkey Numbers Diagnostic Mode These instructions describe how to enter Diagnostic Mode.
  • Page 29: The Language Support Tool

    The Language Support Tool Select the desired test or function. To select a test, press the softkeys to move up or down the list until the desired test is highlighted. Then press the softkey to ENTER start that test. Exit Diagnostic Mode. To exit Diagnostic Mode, turn the unit off.
  • Page 30 The Language Support Tool Activate the Language Support Tool Insert the Language Support Tool data card into the unit. Press softkey 7 and Mark at the same time, and hold them down while turning the Energy Select Switch to Manual On. (See Figure 2-1 for softkey numbering.) Follow the screen prompts.
  • Page 31: Performance Verification Tests

    Performance Verification Tests Performance Verification Tests This section gives instructions 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.
  • Page 32: Visual Inspection

    The unit should have: An undamaged, fully charged M3516A battery. A new, dry roll of Philips 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 printhead elements.
  • Page 33 Performance Verification Tests Inspect the paddles, power cord, 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. Printer roller wear. Wear or damage to power cord and associated strain relief. Corrosion on connector pins, printer parts, or battery contacts.
  • Page 34: Functional Checks

    Performance Verification Tests Functional Checks The functional checks below exercise the basic functions of the defibrillator/ 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 .
  • Page 35 Performance Verification Tests To check ECG printing functions: Reconnect the simulator. Connect the simulator to the M4735A as described in step 1 above. Print a strip. Press Strip to print a strip. Verify that it shows a normal ECG with a clean baseline. Verify that the date, time, and configuration information printed at the top of the strip is correct.
  • Page 36 Performance Verification Tests Synchronized Cardioversion Functional Check This section describes how to check the synchronized cardioversion function. Set up the simulator and the analyzer. Connect the ECG simulator to the ECG cable. Connect the defibrilla- tor analyzer to the pads cable. Set the simulator for normal sinus rhythm (NSR), 1mV amplitude, at some nominal rate (e.g., 60 bpm).
  • Page 37 Performance Verification Tests Functional Check This check only needs to be performed if SpO is installed. Connect the sensor. Attach the SpO transducer to your finger and connect it to the M4735A. Check SpO Activate Manual Mode and press the SpO softkey to turn SpO The SpO value displayed should be in the range of 95-100%.
  • Page 38: Diagnostic Tests

    Performance Verification Tests Diagnostic Tests The M4735A includes an extensive set of Diagnostic Tests, which test the major hardware components of the defibrillator. The Diagnostic Tests include: Test Page System Log 2-23 Extended Self Test 2-25 User Interface Tests 2-28 ECG Tests 2-33 Pacing Test...
  • Page 39 Performance Verification Tests 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. Enter Diagnostic Mode. See "Diagnostic Mode" on page 2-12. Print the System Log.
  • Page 40 Performance Verification Tests Figure 2-2 Sample System Log Printout M4735A SYSTEM LOG Firmware Versions Error Codes Main: 90007 18:33 28 Aug 2000 DSP: 196: 09.00 Key: SpO2: 02.42 01.04 Language: English Serial Number: US01000241 Options: Pacer SpO2 Shocks: 2-24 Performance Verification and Safety Tests...
  • Page 41 Performance Verification Tests 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.
  • Page 42 Performance Verification Tests Check the results. Check the time and date. Check the printout to verify that the time and date are correct. If they are not, reset them using the Configuration Mode. See "Configuration Mode" on page 2-11. Check the test results. The results of the following tests will appear on the display and on the printout: Tests the Random Access Memory (RAM).
  • Page 43 Performance Verification Tests DEFIB The Defib test charges the defibrillator capacitor and then disarms 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...
  • Page 44 Performance Verification Tests 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.
  • Page 45 Performance Verification Tests 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 highlighted each time that key is pressed.
  • Page 46 Performance Verification Tests To test the display: 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.
  • Page 47 Performance Verification Tests To test the printer: Start the Printer Test. Select Printer Test and press ENTER Check the print quality. Verify that the test patterns on the strip are as indicated in Figure 2-4. Check for white lines (printhead elements stuck off) or black lines (printhead elements stuck on).
  • Page 48 Performance Verification Tests Figure 2-4 Printer Test Output Diagonal lines Vertical bars Diamonds 2-32 Performance Verification and Safety Tests...
  • Page 49 Performance Verification Tests ECG Tests 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.
  • Page 50 Performance Verification Tests Selected Lead This setting does not matter at this point. It will be changed later. Change the settings as needed. To temporarily change the settings of Selected lead or AC Line filter, press the softkeys to highlight the parameter, then press (and release) to select it.
  • Page 51 Performance Verification Tests Test the ECG amplifier. These tests measure both the gain and the noise of the two ECG amplifiers (Leads and Pads). Both use the Peak to Peak reading. The Peak to Peak reading measures the peak to peak amplitude of the signal NOTE appearing on the selected ECG input.
  • Page 52 Performance Verification Tests Perform the amplifier noise test: Turn the simulator off. Leave it connected to the ECG cable, and leave Selected lead set to Lead II. Wait for the displayed value under Diagnostic to stabilize. The displayed value should be 0 ± 30 uV. If the unit exhibits more than 30 uV of noise, try repositioning the cable or NOTE unit to minimize external interference.
  • Page 53 Performance Verification Tests The PCI measurement should now read 50 ohms ± 30 ohms. If the reading is off, try wiggling the paddles in their holders. If the reading changes substantially when you do this, the contacts need cleaning. See step (a) above. Remove the paddles from the holders and hold them apart.
  • Page 54 Performance Verification Tests Pacing Test These instructions describe how to test the pacing function. This test only needs to be run if the Pacing option 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.
  • Page 55 Performance Verification Tests Check the default output. The Pacer should be delivering a current of 30mA ±5mA. The display on the M4735A should read the delivered current as mea- sured by the Pacer tester ±5 mA. Test the maximum output. Using the Rate button, increase the rate to 180 bpm.
  • Page 56 Performance Verification Tests Defibrillator Test (AC Power At 200 J) These instructions describe how to test the defibrillation function when powered 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.
  • Page 57 Performance Verification Tests Defibrillator Test (Battery Power At 200 J) These instructions describe how to test the defibrillation function when powered 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 .
  • Page 58 Performance Verification Tests 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 . If there is any failure, begin MAIN troubleshooting and repairing the unit as needed.
  • Page 59: Safety Tests

    Performance Verification Tests Safety Tests This section covers tests of the M4735A’s electrical safety. The Philips Safety Test designation for each test is provided for reference of Philips service personnel. Test Notes Use the procedures called out by the manufacturer of the safety ana- lyzer in use.
  • Page 60 Performance Verification Tests Patient Lead Leakage Leakage out of (Source) or into (Sink) patient-connected inputs (Applied Parts). ECG leads (IEC Type CF) Source Normal Condition (both AC line connections and earth ground intact) Should be < 10 uA. Record as “cc”. Single Fault Condition (separately open neutral and open earth, each in turn) Should be <...
  • Page 61 Performance Verification Tests External Paddles/pads (IEC type BF) Source Normal Condition (both AC line connections and earth ground intact) Should be < 100 uA. Record as “hhh”. Single Fault Condition (separately open neutral and open earth, each in turn) Should be < 500 uA. Record as “iii”.
  • Page 62 Performance Verification Tests Internal Paddles (IEC type CF) Source Normal Condition (both AC line connections and earth ground intact) Should be < 10 uA. Record as “mm”. Single Fault Condition (separately open neutral and open earth, each in turn) Should be < 50 uA. Record as “nn”.
  • Page 63: Battery Capacity Test

    Performance Verification Tests Battery Capacity Test The Battery Capacity Test is not part of the routine post-servicing Performance Verification. This test is part of the routine checks that the user performs. See the Instructions for Use (M4735-91900) for details on the frequency of the Battery Capacity test.
  • Page 65: Troubleshooting

    Troubleshooting Overview This chapter provides information about troubleshooting problems with the M4735A. Chapter Contents The major sections of this chapter are as follows: Section Page Repair Philosophy Equipment Required Troubleshooting and Repair Methodology Troubleshooting Tables Calling for Service 3-32 Repair Philosophy The repair philosophy of the M4735A is subassembly replacement.
  • Page 66: Troubleshooting And Repair Methodology

    Troubleshooting and Repair Methodology Troubleshooting and Repair Methodology Following are the major topics covered: Section Page Methodology Overview Evaluate Troubleshoot Repair Verify Methodology Overview We recommend using the methodology described below to isolate and repair problems with the M4735A. Each of these steps is explained in detail in the pages that follow.
  • Page 67: Evaluate

    Evaluate Evaluate Evaluating the situation is key to understanding what needs repair. Steps in the Evaluation should include those described below. Interview the User If possible, talk directly with the user who reported the problem. What were they were doing when the problem occurred? Exactly what happened with the unit? What was on the display? What tones or voice prompts were heard? Were there operational problems such as a noisy ECG trace? Gather the External Components...
  • Page 68 Evaluate Minimal response 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). Then return to this section and begin again with "Check the Unit".
  • Page 69: Troubleshoot

    Troubleshoot Troubleshoot Once the problems are identified, follow the steps below to discover the causes of those problems. If no causes can be found, proceed to the "Performance Verification and Safety Tests" chapter for instructions on what tests to run. Perform Functional Checks As you develop your list of possible causes, perform Functional Checks as needed to confirm or disprove individual causes.
  • Page 70: Repair

    Repair Repair Once the causes are known, follow the steps below to perform the repair. Check internal connections It is always good practice to check the unit’s internal connections before replacing any subassemblies. See "Removal, Handling, and Replacement" on page 4-2 for details. Replace Defective Subassemblies If the problems were not resolved by verifying internal connections, follow the procedures in the "Removal and Replacement"...
  • Page 71: Verify

    Verify Verify Use the procedures found in the "Performance Verification and Safety Tests" chapter to verify that the unit is operating properly. Be sure the testing per- formed is appropriate for the level of repair. The requirements for testing are described in detail beginning with "External Repairs/No Trouble Found"...
  • Page 72: Troubleshooting Tables

    Troubleshooting Tables Troubleshooting Tables Tables are provided to cover the troubleshooting topics below. General Problems Page Unit Unresponsive Error Codes 3-10 System Messages 3-12 Momentary Messages 3-15 Audio Tones 3-17 Extended Self Test Failures 3-18 Operational Problems Page ECG Monitoring 3-19 SpO2 Monitoring 3-22...
  • Page 73: General Problems

    General Problems General Problems The following tables describe general or system-level problems. For problems pertaining to a particular operation or function, see "Operational Problems" on page 3-19. Unit Unresponsive Isolate the fault by following the steps in Table 3-1. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected.
  • Page 74: Error Codes

    General Problems Error Codes The System Log provides error codes in 5 digit hexadecimal format, as shown below. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Confirm any errors by running the self-test again, making sure that no one touches the unit during the test.
  • Page 75 General Problems Table 3-2 Error Codes (Continued) Error Code Possible Causes Corrective Actions 80000 - 8FFFF IRDA failure. 1. Replace Keyscan PCA. 2. Replace Control PCA. 90000 - 90002 Self Test failure - RAM/ROM or Gate 1. Replace lithium battery. Array.
  • Page 76: System Messages

    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 Instructions for Use. System messages are duplicated here for the reference of the service person.
  • Page 77 General Problems Table 3-3 System Messages (Continued) Message Description Corrective Action No Paddles Connected The paddles are not properly connected to Check that the external paddles are con- the device. nected. Pads Cable Off The pads cable is not connected to the Check that the pads cable connector is defibrillator.
  • Page 78 General Problems Table 3-3 System Messages (Continued) Message Description Corrective Action SpO2 Low Signal signal is too low to give an accurate 1. Check the sensor is applied properly. 2. Try another sensor type. reading. SpO2 Noisy Signal Excessive patient movement, electrical 1.
  • Page 79: Momentary Messages

    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 Instructions for Use. Momentary messages are duplicated here for the reference of the ser- vice person.
  • Page 80 General Problems Table 3-4 Momentary Messages (Continued) Message Possible Cause Corrective Action Data Card Full No data is being recorded on the Data Card, due to one of the following: • The incident is more than 2 hours in • None. A new Data Card can not be duration, causing the Data Card to fill.
  • Page 81: Audio Tones

    General Problems Audio Tones The M4735A emits tones to alert you to its status. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-5 Audio Tones Tone Meaning Suggested Action...
  • Page 82: Extended Self Test Failures

    General Problems Extended Self Test Failures Should the unit report a FAIL in the Extended Self Test, resolve it using the solutions below. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-6 Extended Self Test Failures Failure Possible Cause...
  • Page 83: Operational Problems

    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.
  • Page 84 Operational Problems Table 3-7 Operational Problems - ECG Monitoring (Pads, Paddles or Leads) (Continued) Symptom Possible Cause Suggested Solution Noisy trace - intermittent bursts of Nearby source of time-varying Try moving cable/leads; try noise or random spikes. interference, such as radio relocating the unit.
  • Page 85 Operational Problems Table 3-7 Operational Problems - ECG Monitoring (Pads, Paddles or Leads) (Continued) Symptom Possible Cause Suggested Solution Pads Off Open in internal Pads ECG wiring or message even though front end, due to: pads cable has been replaced and is properly connected to the simulator.
  • Page 86: Spo2 Monitoring

    Operational Problems Table 3-7 Operational Problems - ECG Monitoring (Pads, Paddles or Leads) (Continued) Symptom Possible Cause Suggested Solution QRS beeper inaudible or beeps do The QRS beeper is configured to Configure the QRS beeper to On. not occur with each QRS complex. Off.
  • Page 87: Defibrillation And Cardioversion

    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 Possible Causes...
  • Page 88 Operational Problems Table 3-9 Operational Problems - Defibrillation and Synchronized Cardioversion (Continued) Message or Symptom Possible Causes Suggested solution Charges, but disarms when press Patient impedance sensed as too Replace paddles, or pads and pads SHOCK high or too low during energy deliv- cable.
  • Page 89: Pacing

    Operational Problems Table 3-9 Operational Problems - Defibrillation and Synchronized Cardioversion (Continued) Message or Symptom Possible Causes Suggested solution Doesn’t measure its own delivered Power PCA failure. Replace Power PCA. energy correctly. Control PCA failure. Replace Control PCA. Not synchronizing even though Control PCA failure.
  • Page 90: Printer

    Operational Problems Printer The following table covers problems that may arise while printing. Before replacing any parts, check to see if the cables and flex circuits are NOTE 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 on each end.
  • Page 91: Display

    Operational Problems Table 3-11 Operational Problems - Printer (Continued) Symptom Possible Causes Suggested solution Fails Printer Test in Diagnostic Printer failure. Replace Printer. Mode (other then symptoms above). Control PCA failure. Replace Control PCA. Display The following table covers problems that may arise with the display. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected.
  • Page 92: Audio

    Operational Problems Audio The following table covers problems that may arise with the audio tones or voice prompts. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-13 Operational Problems - Audio Tones/Voice Prompts Symptom Possible Causes...
  • Page 93: Controls

    Operational Problems Controls The following table covers problems that might arise with the controls. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-14 Operational Problems - Controls Symptom Possible Causes Suggested solution...
  • Page 94: Battery And Charging Circuits

    Operational Problems Battery and Charging Circuits The following tables cover problems that may arise with the Battery or the unit’s battery charging circuits. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-15 Operational Problems - Battery, Charging Circuits Symptom Possible Causes...
  • Page 95: Data Card

    Operational Problems Data Card The following table covers problems that may arise with the Data Card. Before replacing any parts, check to see if the cables and flex circuits are NOTE properly connected. See "Servicing Notes" on page 4-1. Table 3-17 Operational Problems - Data Card Symptom Possible Cause Corrective Action...
  • Page 96: Calling For Service

    Calling for Service Calling for Service For telephone assistance, call the Philips Response Center nearest to you, or visit our website at: www.medical.philips.com/cms. Our Biomed On-Line site can be found at: http://bol.medical.philips.com. United States of America Medical Response Center Tel: 800-548-8833...
  • Page 97: Other International Areas

    Calling for Service Other International Areas Australia France Tel: 131147 Tel: 0803 35 34 33 Germany Italy Tel: 0180 5 47 50 00 Tel: 800-825087 Netherlands United Kingdom Tel: 31 20 547 2555 Tel: 00 44 7002 432584 Fax: 31 29 547 2949 Belgium (for Dutch) Belgium (for French) Tel: 32 2 525 7102...
  • Page 98: Equipment Information

    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 ___________________________________________________...
  • Page 99: Removal And Replacement

    This data must be recorded for both the failed assembly and the replacement assembly. Philips 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...
  • Page 100: Removal, Handling, And Replacement

    Servicing Notes 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: Always unlatch the PCA-mounted connector before removing the flex circuit, and hold the latch open while reinserting the flex circuit into the connector.
  • Page 101: Tool Requirements

    Servicing Notes Replacing all gaskets in their proper locations. Correctly assembling all 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.
  • Page 102: External Assemblies

    External Assemblies External Assemblies This section describes how to remove and replace assemblies that are external to the case. These assemblies include: Assembly Page User Replaceable Parts and Accesso- ries Printer Assembly Battery Cover 4-10 Main Fuse 4-14 Battery Eject Assembly 4-14 Data Card Door 4-16...
  • Page 103: User Replaceable Parts And Accessories

    External Assemblies User Replaceable Parts and Accessories The Instructions for Use gives detailed instructions on replacing the follow- ing: Patient cables & sensors Battery Printer paper User Maintenance The Instructions for Use gives detailed instructions on maintaining and cleaning the M4735A, including: Operational Checks Battery Maintenance Cleaning Instructions...
  • Page 104: Printer Assembly

    External Assemblies Printer Assembly The following steps describe how to remove and replace the printer assembly. Preparation Discharge the power supply capacitors. Disconnect the AC power and remove the battery. Turn the Energy Select Switch to either AED On or Manual On. Wait at least one full minute before proceeding.
  • Page 105 External Assemblies Figure 4-1 Removing the Printer Label and Screws Platen and Roller Label Sliding Door M4735A Service Manual...
  • Page 106 Printer ribbon cable External Assemblies Remove the printer assembly. Pull the printer straight up out of the printer bucket. See Figure 4-2 on page 4-8. Disconnect the ribbon cable. Unlatch the connector latches and unplug the ribbon cable as shown in See Figure 4-2 on page 4-8.
  • Page 107 External Assemblies Replacement Replace the 4 screws. 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. Reconnect the ribbon cable. Align the ribbon connector and push it straight into the connector on the printer.
  • Page 108: Battery Cover

    External Assemblies Battery Cover The instructions that follow describe how to remove and replace the battery cover. Preparation Remove the battery. Remove the paddles from their retainers and unplug them from the unit. 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.
  • Page 109 External Assemblies Check that the Battery Eject Spring is all the way at the bottom of its slot. Check the orientation of the 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.
  • Page 110: Main Fuse

    External Assemblies Main Fuse The main fuse is located on the Battery PCA, which is under the Battery Cover. Removal Remove the Battery Cover See "Battery Cover" on page 4-10. Remove the fuse. Pull out the Battery PCA far enough to access the fuse. Remove the fuse by pulling straight up from PCA as shown in See Figure 4-5 on page 4-12.
  • Page 111 External Assemblies Replacement Snap the new fuse into position on the PCA. 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. Replace the battery cover.
  • Page 112: Battery Eject Assembly

    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 Remove the Battery Cover See "Battery Cover" on page 4-10. Remove the Battery Eject Button.
  • Page 113 External Assemblies Replacement Install the Spring into the Catch. Insert the new Battery Catch Spring into the hole in the end of the new Battery Eject Catch. 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 triangular plastic catch faces up toward you through the open slot.
  • Page 114: Data Card Door

    External Assemblies Data Card Door The following sections describe how to remove and replace the Data Card Door. Removal Open the door. This will expose the spring-loaded shaft on which the door pivots. Compress the shaft. Using a small, flat-bladed screwdriver, catch the left end of the pivot shaft (not the left end of the spring) and slide it toward the center, compressing the spring.
  • Page 115: Energy Select Knob

    External Assemblies Replacement 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. Insert the door. The new door comes complete with the black latch, the pivot shaft and the NOTE spring already installed in the door.
  • Page 116: Paddle Holders

    External Assemblies Paddle Holders The following sections describe how to remove and replace the Paddle Holders. Preparation Remove the paddles from the holders. Removal Remove the Paddle Holder. Remove the 2 T15 screws. These flat head T15 screws are different from the pan head T15 screws used NOTE in the rest of the unit.
  • Page 117 External Assemblies Figure 4-9 Removing the Clip Metal Clip Replacement Replace the clip. Place the clip in its slot in the case. Use the new one that came with the replacement Paddle Holder. Replace the T10 nut and tighten securely. Replace the Paddle Holder.
  • Page 118: Labels

    External Assemblies Labels The labels used on the M4735A are divided into 4 groups: Instruction Label Set Case Label Set Branding Label Set 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.
  • Page 119 External Assemblies Figure 4-10 Instruction Label and Case Label Locations Connector Label Instruction Label Printer Label Figure 4-11 Case Label Locations Patient Connector Label Eject Data Card Label Blank Label M4735A Service Manual 4-21...
  • Page 120 External Assemblies Branding Label Set Branding labels include: Philips label HeartStart XL 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 Label Locations...
  • Page 121: Removing And Replacing Labels

    External Assemblies Removing and Replacing Labels The following sections describe how to remove and replace any of the labels. Removal Start at one corner. Using a sharp tool such as a utility knife, pick up one corner of the label. Peel up the label.
  • Page 122: Opening The Case

    Opening the Case Opening the Case To open the sealed case safely, perform the following steps, in the order listed: Discharge the Power Supply Capacitors (page 4-24). Separate the Case (page 4-26). 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 two methods of discharging the unit’s power supply capacitors.
  • Page 123 Opening the Case Disconnect the battery connector. Unplug the 4-pin battery connector from the Power PCA. See Figure 4-14. Use the disarm resistors to discharge the power supply capacitors. Using two clip leads, connect one clip lead to each end of one of the Disarm Resistors.
  • Page 124: Separate The Case

    Opening the Case Separate the Case Dangerous voltages may be present on components and connections exposed during WARNING unit disassembly. Use extreme caution while the unit cover is removed. Be sure to work in a static free environment. Use an electrostatic wrist band. CAUTION The work surface and area surrounding it must be static free.
  • Page 125 Opening the Case Figure 4-15 Removing the Case Screws Screw Located In Power Supply Power Supply Battery Compartment Screws Screws Bottom Section Bottom Section of Case of Case Handle Handle Open the case. Start opening the case at the back edge to break any adhesion along the gasket.
  • Page 126 Opening the Case Pivot the top case to a vertical position. Once the case halves are separated, pivot the top case to the right as shown in Figure 4-16. Stop when the top case is resting on its edge, next to the bottom case. Do not proceed with the next step until you are sure the power supply capaci- CAUTION tors have been discharged.
  • Page 127 Opening the Case 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...
  • Page 128: Discharge The Defibrillator Capacitor

    Opening the Case Discharge the Defibrillator Capacitor The steps that follow describe how to discharging the unit’s Defibrillator Capacitor. Always discharge the defibrillator capacitor before servicing this unit. WARNING To avoid completing a high voltage circuit, use only one hand to perform the WARNING following steps.
  • Page 129 Opening the Case Secondary Method Using two clip leads, connect one clip lead to each end of one of the Disarm Resistors. Touch the clip leads directly to the spade terminals on the Power PCA where the Defibrillator Capacitor is connected. Maintain this connection for at least 5 seconds.
  • Page 130: Identifying Internal Subassemblies

    Opening the Case Identifying Internal Subassemblies Refer to Figure 4-19 to identify the internal subassemblies. Figure 4-19 Internal Subassemblies Patient Foam Defibrillator Power AC Mains ECG Out Connector Connector Base Capacitor Supply Connector (Sync) ECG Connector Connector Power IrDA Keyscan Control Display Speaker...
  • Page 131: Internal Assemblies - Top Case

    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 4-50...
  • Page 132: Lithium Backup Battery

    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. A cable tie wrap and a package of ProGold wipes are included in the Lithium Battery replacement kit.
  • Page 133 Internal Assemblies - Top Case After Repair After the repair is complete, perform the following steps. Replace and reconnect the Control PCA. See "Control PCA" on page 4-36. Reassemble the case. See "Closing the Case" on page 4-103. Restore the system configuration. Use the Language Support Tool to restore the unit’s serial number and to select whether SpO hardware is installed or not.
  • Page 134: Control Pca

    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. All Control PCAs are American English, part number M4735-68100.
  • Page 135 Internal Assemblies - Top Case Figure 4-20 Control PCA Connections Ribbon Cable to Data Card Printer Receptacle Ribbon Cable to Power PCA Ribbon Cable to Parameter PCA 2-Wire Cable to Speaker Lithium Battery Control Display Ribbon Cable to (Under Cable) Keyscan PCA M4735A Service Manual 4-37...
  • Page 136 Internal Assemblies - Top Case Remove the screws. Remove the eight screws around the edges of the Control PCA. See Figure 4-21 on page 4-38. Remove the one screw near the center of the PCA. Be careful not to damage any nearby components or traces. Remove the Control PCA.
  • Page 137 Internal Assemblies - Top Case Replacement 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. Do not drag the PCA over the surface of the shield plate to align it. CAUTION Replace the screws.
  • Page 138: Shield Plate

    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 removing and replacing other assemblies. Preparation Disconnect and remove the Control PCA. See "Control PCA"...
  • Page 139 Internal Assemblies - Top Case Replacement Lower the plate into place. Be sure to engage the tabs on the Keyscan PCA into the mating slots in the Shield Plate. Replace the five screws. TIP: Screw installation is easier if all screws are started in their holes before any one of them is tightened.
  • Page 140: Keyscan Pca

    Internal Assemblies - Top Case Keyscan PCA The following sections describe how to remove and replace the Keyscan PCA. Preparation 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.
  • Page 141 Internal Assemblies - Top Case If your device has a metal bracket, remove the T10 screw and nut. Hold the nut in place with needle nose pliers so it doesn’t fall into the case. Disconnect the two main keypad flex circuits and remove the metal bracket.
  • Page 142 Internal Assemblies - Top Case Figure 4-23 Keyscan PCA Connections Flex Flex Single Wire to Paddle Wires (2) Small Ribbon Cable Circuits (2) Circuits (2) Power PCA to Display to Pacing to Main Keypad Keypad Cable to IrDA PCA Large Ribbon Ribbon Cable to Ribbon Cable to Work...
  • Page 143 Internal Assemblies - Top Case Unscrew and remove the Keyscan PCA. Unscrew the two 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. Lift the Keyscan PCA out of the case and lay it component side up on a static-safe surface.
  • Page 144 Internal Assemblies - Top Case 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.
  • Page 145 Internal Assemblies - Top Case Replacement Replace the IrDA break-off PCA. If the IrDA PCA was removed, replace it now. Connect the cable to the IrDA PCA. Place the IrDA PCA in position inside the top case. Replace the two screws. Connect the three individual wires to the Keyscan PCA.
  • Page 146 Internal Assemblies - Top Case Connect the small main keypad flex circuit. Have the latching top of the connector up; then slide the flex circuit into place and push the top down to latch it. Reposition the ferrite, as shown in Figure 4-26. Connect the large keypad flex circuit.
  • Page 147 Internal Assemblies - Top Case After Repair After the repair is complete, perform the following steps. 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"...
  • Page 148: Bezel Assembly

    Internal Assemblies - Top Case Bezel Assembly The following sections describe how to remove and replace the Bezel Assembly. The Bezel Assembly comes from the factory with the Main keypad and its rubber overlay pre-installed. The keypad and overlay are not available separately - if the rubber or keypad are damaged, the entire Bezel Assembly must be replaced.
  • Page 149 Internal Assemblies - Top Case Figure 4-27 Removing the Bezel Assembly Mating Case Tab (6 total) Locking Clip on Bezel (6 total) Energy Select Switch Work Surface Threaded Handle Display Standoffs Assembly Remove the Energy Select knob and switch. (OPTIONAL) If the Bezel Assembly is being replaced, also remove the Energy Select knob and switch.
  • Page 150 Internal Assemblies - Top Case Replacement Replace the Display Assembly. See "Display Assembly" on page 4-56. Replace the Energy Select switch and knob. See "Energy Select Switch" on page 4-54. Snap the Bezel Assembly onto the front of the case. Guide the Energy Select ribbon cable, the Display ribbon cables, and the Keypad flex circuits through their respective openings in the case.
  • Page 151 Internal Assemblies - Top Case After Repair After this repair is complete, perform the following steps. 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"...
  • Page 152: Energy Select Switch

    Internal Assemblies - Top Case Energy Select Switch The following describes how to remove and replace the Energy Select Switch. Preparation 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.
  • Page 153 Internal Assemblies - Top Case Replacement Replace and reconnect the Energy Select Switch. Insert the Energy Select switch into the hole in the Bezel. Orient it as shown in Figure 4-28. Fit the switch into place between the square ribs on the Bezel. Be sure the switch is fully bottomed against the Bezel.
  • Page 154: Display Assembly

    Internal Assemblies - Top Case Display Assembly The following sections describe how to remove and replace the Display Assembly. The Display Assembly is mounted to the back of the Bezel. Preparation 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.
  • Page 155 Internal Assemblies - Top Case Figure 4-29 Removing the Display Display Assembly Display Ribbon Cables Energy Select Switch Bezel Assembly (Shown removed from case After Repair After repairs are complete, perform the following steps. Replace the Bezel on the case. See "Bezel Assembly"...
  • Page 156: Parameter Pca

    Internal Assemblies - Top Case Parameter PCA The Parameter PCA is located in the top case, behind the printer bucket. Preparation 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. Open the case safely.
  • Page 157 Internal Assemblies - Top Case Connect the large ribbon cable (connects to the Control PCA). Connect the small 3-pin connector next to the ribbon cable. Figure 4-30 Removing the Parameter PCA Ribbon Cable to ECG Out (Sync) Control PCA Connector Connector Cable to Connector...
  • Page 158: Spo2 Pca

    Internal Assemblies - Top Case The SpO PCA is located in the top case, 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. NOTE If you are replacing the SpO PCA in a device with a software release prior to Main 16, you must upgrade the device’s software to this release after the...
  • Page 159 Internal Assemblies - Top Case Replacement Replace the SpO PCA. Lower the PCA into position on top of the Parameter PCA. The SpO PCA should be oriented so the 2 connectors are on top, and pointing to the right. Connect the SpO PCA.
  • Page 160 Internal Assemblies - Top Case Figure 4-32 Removing the SpO PCA on Devices with a Push-in Connector Ribbon Cable to Control PCA Flex Circuit Parameter to SpO Connector Push-in Connector Flex Circuit to Parameter After Repair After repairs are complete, perform the following steps. Reassemble the case.
  • Page 161: Ecg Connector

    Internal Assemblies - Top Case ECG Connector The ECG connector is located at the back of the top case, next to the SpO connector (if present). The following sections describe how to remove and replace the ECG Connector. Preparation 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.
  • Page 162 Internal Assemblies - Top Case Replace the ECG Holder. Slide the large hole in the ECG Holder onto the cable and down over the ECG Connector. As it drops into place, align the small slot over the threaded post in the case, with the bent section down toward the post.
  • Page 163 Internal Assemblies - Top Case Figure 4-34 Removing the ECG Connector on Devices with Serial Numbers US002XXXXX ECG Connector (ECG Holder shown removed) Metal Clip Case Standoff Cable to Parameter PCA Parameter PCA ECG Connector Cable After Repair After repairs are complete, perform the following steps. Reassemble the case.
  • Page 164: Spo2 Connector

    Internal Assemblies - Top Case 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 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.
  • Page 165 Internal Assemblies - Top Case Figure 4-35 Removing the SpO Connector Connector Metal Clip Flex Circuit to SpO2 Connector Connect the SpO Connector. 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.
  • Page 166: Speaker

    Internal Assemblies - Top Case Speaker These instructions describe how to remove and replace the speaker assembly. Preparation 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.
  • Page 167 Internal Assemblies - Top Case Replacement Replace the Speaker. Place the new speaker into position in the case. Install both clamps and both screws. See Figure 4-36 on page 4-68. 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).
  • Page 168: Ac Mains Connector

    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 (Sync) connector. Preparation 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.
  • Page 169 Internal Assemblies - Top Case Figure 4-37 Removing the AC Mains and ECG Out Connectors AC Mains Cable to ECG Out (Sync) Connector Parameter PCA Connector Replacement Replace the AC Mains Connector. 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.
  • Page 170 Internal Assemblies - Top Case Replace the ECG Out (Sync) Connector. 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 direction.
  • Page 171: Ecg Out (Sync) Connector

    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 4-70.
  • Page 172: Pacer Keypad

    Internal Assemblies - Top Case Pacer Keypad The following sections describe how to remove and replace the Pacer Keypad. Preparation 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.
  • Page 173 Internal Assemblies - Top Case Figure 4-38 Peeling up the Rubber Overlay Rubber Membrane Overlay Switches Figure 4-39 Peeling up the Membrane Switches Membrane Recess in Switches Case M4735A Service Manual 4-75...
  • Page 174 Internal Assemblies - Top Case Replacement Prepare the case. Clean off all adhesive residue from the case by rubbing the dry surface 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.
  • Page 175 Internal Assemblies - Top Case Figure 4-40 Installing the Membrane Switches Membrane Flex Circuit Slot in Case Switches Tails Figure 4-41 Replacing the Rubber Overlay Rubber Membrane Overlay Switches M4735A Service Manual 4-77...
  • Page 176 Internal Assemblies - Top Case After Repair After repairs are complete, perform the following steps. Replace the Bezel. See "Bezel Assembly" on page 4-50. 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.
  • Page 177: Replacement Top Case

    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. Bezel gasket.
  • Page 178 Internal Assemblies - Top Case Removal and replacement The Top Case is probably the most difficult and time consuming repair that can be done on the M4735A: Several existing parts need to be moved from the old case to the new. Several new parts must be installed: - some come with the top case.
  • Page 179 Internal Assemblies - Top Case 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.: ECG/SpO connector gaskets (not available separately) (see...
  • Page 180 Internal Assemblies - Top Case Restore the customer’s configuration. Enter Configuration Mode and reload the customer’s configuration from the data card, or reconfigure the unit, as needed. See "Configuration Mode" on page 2-11. Test performance. Conduct Performance Verification Testing as described in "Performance Verification and Safety Tests"...
  • Page 181: Internal Assemblies - Bottom Case

    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 Page Battery PCA 4-84 Defibrillator Capacitor 4-88 Power PCA 4-90 Power Supply 4-94 Patient Connector 4-98...
  • Page 182: Battery Pca

    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 Power Supply.
  • Page 183 Internal Assemblies - Bottom Case Figure 4-42 Battery PCA connections 2-Pin Connector 2-Pin Connector to to Power PCA Power Supply 4-Pin Connector to Power PCA (Battery Connector) Figure 4-43 Removing the Battery PCA Battery PCA Spring Battery PCA Gasket Battery Eject Spring M4735A Service Manual 4-85...
  • Page 184 Internal Assemblies - Bottom Case Replacement Insert the wires and gasket into the case. Start with the two halves of the case mated together. Turn the unit over so the bottom faces up. Guide the wires and connectors from the new PCA into the hole in the bottom case.
  • Page 185 Internal Assemblies - Bottom Case After Repair After this repair is complete, perform the following steps. Reassemble the case. See "Closing the Case" on page 4-103. Restore the customer’s configuration. Enter Configuration Mode and reload the customer’s configuration from the data card, or reconfigure the unit, as needed. See "Configuration Mode"...
  • Page 186: Defibrillator Capacitor

    Internal Assemblies - Bottom Case Defibrillator Capacitor Always discharge the defibrillator capacitor before performing any service opera- WARNING tions on this unit. See "Separate the Case" on page 4-26. Preparation 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.
  • Page 187 Internal Assemblies - Bottom Case Restore the capacitor to its final position. Pivot the capacitor around to the left. Guide the white wire through the slot in the foam base. Lower the foam base onto the Power PCA. Figure 4-44 Disconnecting the Capacitor Power Supply Foam Base Defibrillator Capacitor...
  • Page 188: Power Pca

    Internal Assemblies - Bottom Case Power PCA The Power PCA is located in the bottom case. Preparation 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.
  • Page 189 Internal Assemblies - Bottom Case Figure 4-45 Disconnecting the Power PCA High Voltage 9-Pin Connector to High Voltage 6-Pin Connector to Spade Connectors to Patient Connector Spade Connectors to Power Supply Defibrillator Capacitor Patient Connector (Two Total) (Two Total) Power PCA Large 4-Pin Connector to 4-Pin Connector 2-Pin Connec-...
  • Page 190 Internal Assemblies - Bottom Case Remove the Power PCA. Remove the 6-T10 size screws from the Power PCA. Pull the Power PCA up and guide it around the Patient Connector and the case post. TIP: Lift the back edge of the PCA (nearest the Power Supply) 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.
  • Page 191 Internal Assemblies - Bottom Case Connect the Control PCA ribbon cable. Connect the large ribbon cable. Its other end will still be disconnected from the Control PCA. Connect the Power Supply. Connect the 2-pin in-line connector to the Battery PCA; be sure it latches.
  • Page 192: Power Supply

    Internal Assemblies - Bottom Case Power Supply The following sections describe how to remove and replace the Power Supply. Preparation 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.
  • Page 193 Internal Assemblies - Bottom Case Figure 4-47 Power Supply Connections 4-Pin Connector to 2-Pin Connector to Power PCA Battery PCA 6-Pin Connector to Power PCA M4735A Service Manual 4-95...
  • Page 194 Internal Assemblies - Bottom Case Remove the Power Supply. Tilt the top of the Power Supply in toward the Power PCA. Guide the Power Supply out from under the end of the Power PCA, then lift it out of the case. Figure 4-48 Removing the Power Supply Power Defibrillator...
  • Page 195 Internal Assemblies - Bottom Case Replace the screws. Mate the two case halves together. Flip the unit over bottom side up. Replace the two T15 screws and tighten. Flip the unit rightside up and unmate the case halves. Figure 4-49 Replacing the Power Supply Power Supply Notch in...
  • Page 196: Patient Connector

    Internal Assemblies - Bottom Case Patient Connector The following sections describe how to remove and replace the Patient Connector. The Patient Connector is where the paddles or the pads cable con- nect to the M4735A. Preparation 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.
  • Page 197 Internal Assemblies - Bottom Case Figure 4-50 Removing the Patient Connector 9-Pin Connector High Voltage to Power PCA Spade Connector to Power PCA ( Total Large Nut Metal Plate Case Wall Patient O Ring Connector Replacement Replace the Patient Connector. Slide the wires of the new connector through the new O-ring that came with the connector.
  • Page 198 Internal Assemblies - Bottom Case Connect the Patient Connector to the Power PCA. Connect the 9-pin connector; be sure it latches. Connect the two High Voltage spade connectors by pushing straight down with a needle nose pliers. The two spade connectors are different sizes to ensure correct connection. NOTE After Repair After repairs are complete, perform the following steps.
  • Page 199: Replacement Bottom Case

    Internal Assemblies - Bottom Case Replacement Bottom Case The following sections describe how to remove and replace the Bottom Case Assembly. Description The Bottom Case Assembly consists of the following components, all preassembled into the case at the factory. Data Card Door. Battery Eject Latch mechanism Case gasket.
  • Page 200 Internal Assemblies - Bottom Case 5. Power PCA and shield (see "Power PCA" on page 4-90). 6. Power Supply (see "Power Supply" on page 4-94). 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.
  • Page 201: Closing The Case

    Closing the Case Closing the Case To close the case: Recheck connections. Recheck connections to all PCAs. Be sure all connectors are fully seated and latched. Make the unit ready for assembly. Make sure the Data Card ejector button is pressed in fully. Orient the 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.
  • Page 202 Closing the Case Check to be sure the back corners of the case are properly mated. If one corner won’t mate, check to be sure the case standoffs are in their correct locations. The two case standoffs are different colors - the gray standoff should be near NOTE the ECG connector, and the yellow standoff near the AC Mains connector.
  • Page 203: Overview

    Ordering Replacement Parts To order replacement parts: In the US, call 877-447-7278. Outside the US, contact your local Philips Medical Systems office. Ordering Supplies and Accessories To order accessories and supplies: In the US, visit our Medical Systems website at: www.medical.phil- ips.com/cms and follow the links to Supplies...
  • Page 204: Key Components

    This data must be recorded for both the failed assembly and the replacement assembly. Philips Medical Systems 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 5-18 on page 5-25.
  • Page 205: Calling For Service

    Calling for Service Calling for Service For telephone assistance, call the Philips Response Center nearest to you, or visit our website at: www.medical.philips.com/cms. Our Biomed On-Line site can be found at: http://bol.medical.philips.com. United States of America Medical Response Center Tel: 800-548-8833...
  • Page 206: Other International Areas

    Calling for Service Other International Areas Australia France Tel: 131147 Tel: 0803 35 34 33 Germany Italy Tel: 0180 5 47 50 00 Tel: 800-825087 Netherlands United Kingdom Tel: 31 20 547 2555 Tel: 00 44 7002 432584 Fax: 31 29 547 2949 Belgium (for Dutch) Belgium (for French) Tel: 32 2 525 7102...
  • Page 207: Special Tools

    Special Tools Special Tools The following special tools are available for purchase from Philips Medical Systems. To order these special tools, contact Philips Medical Systems as described in "Ordering Replacement Parts" on page 5-1. Tool Part Number Torx driver kit...
  • Page 208: M4735A Unit Exchange Program

    Customer removes all paddles, cables, sensors, accessories, battery, data card, and consumables from defective unit. Customer cleans and decontaminates the defective unit. Customer packs the defective unit into the box and ships it to Philips Medical Systems. Return shipping instructions are included with the exchange unit.
  • Page 209: Replacement Parts Tables

    Replacement Parts Tables Replacement Parts Tables These tables provide part numbers for ordering specific replacement assemblies and parts. Electrical Assemblies Page Control PCA Other Replacement PCAs 5-10 Other Electrical Assemblies 5-10 Individual Electrical Parts 5-11 Mechanical Assemblies Page Bezel Assembly 5-12 Pacer Keypad Assembly 5-13...
  • Page 210: Electrical Assemblies

    Electrical Assemblies Electrical Assemblies The following tables provide information about replacement electrical assemblies. Control PCA The replacement Control PCA includes the Lithium backup battery, the battery’s cable tie wrap, and the black plastic shield for the Data Card receptacle entrance. All Control PCAs are American English, part number M4735-68100.
  • Page 211 Electrical Assemblies Table 5-2 Language Support Tool (Continued) Part Number for Main Part Number for Main Language Polish M4735-87919 M4735-87969 British English M4735-87930 M4735-87970 Australian English M4735-87940 M4735-87950 8 MB card for SoftServer M3510-87890 M3510-87890 M4735A Service Manual...
  • Page 212: Other Replacement Pcas

    Electrical Assemblies Other Replacement PCAs These PCAs come with specific parts as noted. Table 5-3 Other Replacement PCAs Description Part Number Notes Power PCA with Pacing M4735-68110 Power PCA without Pacing M4735-68111 Keyscan PCA M4735-68120 SpO 2 PCA M4735-68126 Parameter PCA Includes standoffs for SpO PCA.
  • Page 213: Individual Electrical Parts

    Electrical Assemblies Individual Electrical Parts These electrical parts are available separately. Table 5-5 Individual Electrical Parts Description Part Number Notes Lithium Battery Replacement Kit M3500-69565 Includes battery, ProGold wipes, and cable tie wrap Main Fuse (25A, 32V) 2110-0250 Pkg. of 5 Items marked with an asterisk ( ) contain Key Components which require tracking.
  • Page 214: Mechanical Assemblies

    Mechanical Assemblies Mechanical Assemblies The following tables provide information about replacement mechanical assemblies. Bezel Assembly The Bezel Assembly comes with the Main Keypad and the display window installed. Table 5-6 Replacement Bezel Assembly Language Part Number English M4735-68400 French M4735-69401 German M4735-69402 Dutch...
  • Page 215: Pacer Keypad Assembly

    Mechanical Assemblies Pacer Keypad Assembly 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 Japanese M4735-69507 Norwegian...
  • Page 216: Other Mechanical Assemblies

    Mechanical Assemblies Other Mechanical Assemblies These assemblies come with specific 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.
  • Page 217: Individual Mechanical 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. T10 (M3X0.5) screw 0515-0375 Long screw used to connect the paddle wires from the Keyscan PCA to the through-case connection to the Paddle Clip.
  • Page 218: Labels

    Labels 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"...
  • Page 219 Labels Table 5-12 Instruction Label Sets - With Pacing Language Part Number English M4735-69700 French M4735-69701 German M4735-69702 Dutch M4735-69703 Spanish M4735-69704 Italian M4735-69705 Swedish M4735-69706 Japanese M4735-69707 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.
  • Page 220: Case Label Sets

    Labels 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...
  • Page 221 Labels Table 5-14 Case Label Sets - With SpO Language Part Number English M4735-69820 French M4735-69821 German M4735-69822 Dutch M4735-69823 Spanish M4735-69824 Italian M4735-69825 Swedish M4735-69826 Japanese M4735-69827 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.
  • Page 222: Paddle Labels

    Labels Paddle Labels Order one of the language-specific labels listed in this table for use with the External Paddles with PCI (M4746-69001). Table 5-15 Paddle Labels Language Part Number English M1722-84520 French M1722-84521 German M1722-84522 Dutch M1722-84523 Spanish M1722-84524 Italian M1722-84525 Swedish M1722-84526...
  • Page 223: Supplies & Accessories

    Visit our Medical Systems website at: www.medical.philips.com/cms and follow the links to Supplies In the US, call 800-225-0230. Outside the US, contact your local Philips Medical Systems Sales Office, or your authorized Philips Medical Systems Dealer or Distrib- utor. Table 5-17: Upgrades, Supplies, and Accessories...
  • Page 224 Supplies & Accessories Table 5-17: Upgrades, Supplies, and Accessories (Continued) Part Number Description Defibrillation Pads, Pads Cables, Adapters and Test Load (gray flat connector) M3713A Multifunction Adult Plus Pads - Adult Plus multifunction defib pads (general use). M3716A Multifunction Adult Radiolucent Pads - Adult Radiolucent multifunction defib pads (special purpose - for X-ray and special procedures).
  • Page 225 Supplies & Accessories Table 5-17: Upgrades, Supplies, and Accessories (Continued) Part Number Description Internal Paddles (Switched/Switchless) 7.5 cm Switchless Internal Paddles M1741A 6.0 cm Switchless Internal Paddles M1742A 4.5 cm Switchless Internal Paddles M1743A 2.8 cm Switchless Internal Paddles M1744A 7.5 cm Switched Internal Paddles M4741A 6.0 cm Switched Internal Paddles...
  • Page 226 Supplies & Accessories Table 5-17: Upgrades, Supplies, and Accessories (Continued) Part Number Description Cables/Sensors M1191A Adult Reusable SpO Sensor M1192A Pediatric Reusable SpO Sensor M1194A Adult/Pediatric Ear Clip, Reusable SpO Sensor M1943A Nellcor SpO Sensor Adapter Cable Data Card M3510A Data Card Battery Sealed Lead Acid Battery...
  • Page 227: Key Components

    Key Components 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 5-18 Key Components Replacement Assembly Key Component Description Part Number Description...
  • Page 228 Key Components Table 5-18 Key Components (Continued) Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method MECHANICAL ASSEMBLIES Main Keypad Switch M4735-60200 Date Code Bezel Assembly Assembly English M4735-69400 French M4735-69401 German M4735-69402 Dutch M4735-69403 Spanish M4735-69404 Italian M4735-69405 Swedish...
  • Page 229 Key Components Table 5-18 Key Components (Continued) Replacement Assembly Key Component Description Part Number Description Part Number Tracking Method Pacer Keypad M4735-60210 Date Code Pacer Keypad Assembly Switch Assembly English M4735-69500 French M4735-69501 German M4735-69502 Dutch M4735-69503 Spanish M4735-69504 Italian M4735-69505 Swedish M4735-69506...
  • Page 230 Key Components Table 5-18 Key Components (Continued) 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 6.0 cm Switchless M1742A 6.0 cm Switchless M1742A Date Code...
  • Page 231: Theory Of Operation

    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: PCA Descriptions For each Printed Circuit Assembly (PCA), a description of the major functions performed on that PCA. System Functional Descriptions For each major system function, a description of how the signal is routed through the various PCAs.
  • Page 232: Pca Descriptions

    PCA Descriptions 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: Control of power up and power down sequences. Storage of configuration selections made by the user.
  • Page 233: Power Pca

    PCA Descriptions Power PCA The Power PCA performs the following functions: Analog front end for ECG from pads. Impedance measurement for Paddle Contact Indicator (PCI) function. Generation and control of pacing waveforms as directed by Control PCA. Control of defibrillator functions as directed by the Control PCA: Charging the capacitor to the correct energy level.
  • Page 234: Spo2 Pca

    PCA Descriptions The SpO PCA serves as the interface to the SpO sensor, including: Generation and control of voltages to drive the LEDs in the sensor. 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"...
  • Page 235: System Level Interconnections

    System Level Interconnections System Level Interconnections Figure 6-1 System Interconnections M4735A Service Manual...
  • Page 236: System Functional Descriptions

    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 Theory of Operation...
  • Page 237: Ecg Monitoring Functions

    System Functional Descriptions ECG Monitoring Functions There are two separate ECG front ends: one for signals coming in on the paddles 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.
  • Page 238: Spo2 Monitoring Functions

    System Functional Descriptions 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.
  • Page 239: Defibrillation Functions

    System Functional Descriptions Defibrillation Functions The following sections describe the defibrillation functions. Charging There are three basic events that can initiate a charging cycle: In AED Mode, when the analysis algorithm determines a shock is needed and sends a signal to another section of the Control PCA. 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.
  • Page 240 System Functional Descriptions 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.
  • Page 241: Pacing Functions

    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.
  • Page 242: Energy Select Switch

    System Functional Descriptions 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.
  • Page 243 System Functional Descriptions The Battery PCA also detects whether the installed battery is an Philips-approved battery or not. It does this with a microswitch on the battery PCA, which detects if a dimpled recess is present in the end face of the battery.
  • Page 244 System Functional Descriptions Figure 6-3 Power Flow 6-14 Theory of Operation...
  • Page 245 System Functional Descriptions Figure 6-4 Power Distribution and Fusing M4735A Service Manual 6-15...
  • Page 246: Lithium Backup Battery

    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.
  • Page 247: Specifications

    Specifications Overview This section provides: Specifications for the M4735A, Symbol Definitions for symbols appearing on the M4735A, Safety related information, and 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 chapter.
  • Page 248 Specifications Table 7-1 Delivered Energy (J) vs. Load Impedance Selected Load Impedance (ohms) Energy Accuracy ± 1 J ± 2 J ± 2 J ± 2 J 10.0 10.4 10.7 10.4 ± 2 J 18.6 20.0 20.8 21.4 20.8 ± 4 J 27.9 30.0 31.2...
  • Page 249: Ecg Monitoring

    Specifications 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.
  • Page 250: Display

    Specifications Heart Rate Alarms: Configurable pairs of low and high heart rate alarm limits: 30 to 100, 60 to 140, 90 to 160, and 120 to 200 bpm. 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).
  • Page 251: Thermal Array Printer

    Specifications Capacity: With a new, fully charged battery at room temperature (25 >100 minutes ECG monitoring only, or 50 full-energy (200 J) discharges, or 75 minutes ECG monitoring while pacing (100 mA, 100 ppm). Battery Indicators: LOW BATTERY message appears on display when at least 10 minutes of monitoring time and 5 maximum-energy discharges remain (with a new battery at room temperature - 25 Battery Storage: Should not be stored above 40...
  • Page 252: Noninvasive Pacing

    Specifications Noninvasive Pacing Waveform: Monophasic Truncated Exponential. Current Pulse Amplitude: Range: 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);...
  • Page 253: General

    Altitude: Operating: up to 15,000 ft. Storage: up to 15,000 ft. Shock: Philips Medical Systems Section 760, Class B1 Drop Test. Vibration: Philips Medical Systems Corp. Section 759 Class B1 Vibration. Water Resistance: Meets IEC 601-2-4 (44.3), IEC 529 Level IPX0 (non-protected).
  • Page 254: Waveforms

    Waveforms Waveforms Figure 7-1 150J 25 Ohms Biphasic Waveform Time (ms) Figure 7-2 150J 50 Ohms Biphasic Waveform Time (ms) Specifications...
  • Page 255 Waveforms Figure 7-3 150J 75 Ohms Biphasic Waveform 10.0 12.0 Time (ms) Figure 7-4 150J 100 Ohms Biphasic Waveform 10.0 12.0 14.0 16.0 Time (ms) M4735A Service Manual...
  • Page 256 Waveforms Figure 7-5 150J 125 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) Figure 7-6 150J 150 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) 7-10 Specifications...
  • Page 257 Waveforms Figure 7-7 150J 175 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) Figure 7-8 200J 25 Ohms Biphasic Waveform Time (ms) M4735A Service Manual 7-11...
  • Page 258 Waveforms Figure 7-9 200J 50 Ohms Biphasic Waveform Time (ms) Figure 7-10 200J 75 Ohms Biphasic Waveform 10.0 12.0 Time (ms) 7-12 Specifications...
  • Page 259 Waveforms Figure 7-11 200J 100 Ohms Biphasic Waveform 10.0 12.0 14.0 16.0 Time (ms) Figure 7-12 200J 125 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) M4735A Service Manual 7-13...
  • Page 260 Waveforms Figure 7-13 200J 150 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) Figure 7-14 200J 175 Ohms Biphasic Waveform 10.0 15.0 20.0 Time (ms) 7-14 Specifications...
  • Page 261: Symbol Definitions

    Symbol Definitions Symbol Definitions The following table lists the meanings of each symbols shown on the M4735A and the M3516A battery: Table 7-3 Defibrillator and Battery Symbols Symbol Definition Shock hazard. Caution - See operating instructions in Instructions for Use. Input Meets IEC type BF leakage current requirements and is defibrillator protected (Patient Applied Part is isolated and defib-proof suitable...
  • Page 262 Symbol Definitions Table 7-3 Defibrillator and Battery Symbols Symbol Definition Dangerous Voltage Biphasic energy is being used. 7-16 Specifications...
  • Page 263 Symbol Definitions The following table lists the symbols that appear on the M4735A shipping carton: Table 7-4 Shipping Carton Symbols Symbol Definition Atmospheric pressure range. Temperature range. Relative humidity range. Recyclable paper product. Fragile. Right side up. Do not get wet. M4735A Service Manual 7-17...
  • Page 264: Safety Considerations

    Safety Considerations Safety Considerations The following general warnings and cautions apply to use of the HeartStart XL. Additional warning and cautions specific to a particular feature are provided in the appropriate section. The HeartStart XL is not intended to be deployed in settings or situations that WARNING promote use by untrained personnel.
  • Page 265 Safety Considerations During defibrillation, air pockets between the skin and multifunction defib electrode WARNING 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.
  • Page 266 Safety Considerations This device has not been evaluated for use with electrosurgery equipment. CAUTION This device and accessories are not intended for home use. NOTE Do not discharge the defibrillator with the paddles shorted together. CAUTION Properly dispose of or recycle depleted batteries according to local regulations. Do WARNING not puncture, disassemble, or incinerate batteries.
  • Page 267: Electromagnetic Compatibility

    Electromagnetic Compatibility Electromagnetic Compatibility When using the M4735A HeartStart XL Defibrillator/Monitor, electromag- netic compatibility with surrounding devices should be assessed. A medical device 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).
  • Page 268: Restrictions For Use

    See Table 7-9 for the minimum recommended sepa- ration distance between RF communications equipment and the HeartStart XL. The list of cables, transducers, and other accessories with which Philips claims compliance with the emissions and immunity requirements of EN 60601-1-2 are listed in “Maintaining the HeartStart XL”...
  • Page 269: Guidance And Manufacturer's Declaration (Devices With Serial Numbers Us002Xxxxx)

    For additional information about compliance with the EMC standards and the Declaration of Conformity Statement lease see the Philips Medical web site at http://powerstation.medical.philips.com.Click the Business Data Viewer Tab, and then select the Declaration of Conformity link listed under Regula- tory.
  • Page 270 Electromagnetic Compatibility Table 7-6: Electromagnetic Immunity - General IEC 60601 Compliance Electromagnetic Environment Immunity Test Test Level Level - Guidance Electrostatic dis- + 6 kV contact + 6 kV contact Floors should be wood, con- charge (ESD) + 8 kV air + 8 kV air crete, or ceramic tile.
  • Page 271 Electromagnetic Compatibility Table 7-7: Electromagnetic Immunity - Life Supporting Functions IEC 60601 Compliance Electromagnetic Environment - Immunity Test Test Level Level Guidance Portable and mobile RF communications equipment should be used no closer to any part of the HeartStart XL, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
  • Page 272 Electromagnetic Compatibility IEC 60601 Compliance Electromagnetic Environment - Immunity Test Test Level Level Guidance Radiated RF 10 V/m 10 V/m 80 MHz to 800 MHz IEC 61000-4-3 80 MHz to 2.5 800 MHz to 2.5 GHz where P is the maximum output power rat- ing of the transmitter in watts (W) accord- ing to the transmitter’s specified output power and d is the recommended separation...
  • Page 273 Electromagnetic Compatibility Table 7-8: Electromagnetic Immunity - Nonlife Supporting Functions Immunity IEC 60601 Compliance Electromagnetic Environment - Test Test Level Level Guidance Portable and mobile RF communications equipment should be used no closer to any part of the HeartStart XL, including cables, than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter.
  • Page 274 Electromagnetic Compatibility Immunity IEC 60601 Compliance Electromagnetic Environment - Test Test Level Level Guidance Radiated RF 3 V/m 3 V/m IEC 61000-4- 80 MHz to 2.5 80 MHz to 800 MHz 800 MHz to 2.5 GHz where P is the maximum output power rat- ing of the transmitter in watts (W) accord- ing to the transmitter’s specified output power and d is the recommended separation...
  • Page 275: Recommended Separation Distances

    Electromagnetic Compatibility Recommended Separation Distances The HeartStart XL is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the HeartStart XL can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equip- ment (transmitters) and the HeartStart XL as recommended below, according to the maximum output power of the communications equipment.
  • Page 277 Index Battery 6-4, 6-12 Battery Capacity Test AC Mains Connector 4- Cable 2-47 70, 5-14 pads cables 5-28 Battery Charger Kit 5- AC power test 2-6, 2-40 placement 4-2 Accessories 5-1, 5-21 tie wrap 5-15 Battery Eject ordering 7-18 Cables Assembly 4-14, 5- AED Mode 1-1, 3-23, 7-3 Paddles Adapter 5-23...
  • Page 278 Index Control PCA 6-2 Defibrillator 1-1 Diagnostic test 2-6, 2-22 charging 6-9 AC power test 2-6, 2- AC Power 2-40 replacement 4-36, 5-8, Battery Power 2-41 5-25 battery test 2-7, 2-41 Data Card 3-31 signal processing 6-7 capacitor 4-30, 4-88, Defib Meas 3-25 Controls 3-29 5-10, 5-25...
  • Page 279 Index ECG monitor 6-7 Keyscan PCA 5-10, 5-25, amplifier tests 2-35 6-3, 6-11 FIFTY 50J Maximum 3- connector 4-63, 5-14 replacement 4-42 ECG Fault 3-12 Flex circuit connection 4- frequency response 7- Label Front End (FE) test 2-27, Branding Label Set 4- functional checks 2-18 2-34 22, 5-20...
  • Page 280 Index Pads Performance Verification applying 7-18 Configuration Mode No Data Card Present 3- Attach Pads 3-15 2-11 cables 5-28 Diagnostic Mode 2-12 No Shock Delivered 3-15, Pads Cable Off 3-13 Diagnostic tests 2-22 3-24 Pads FE test 2-34 equipment 2-10 Non Pulsatile 3-13 Pads Off 3-13, 3-20, functional checks 2-18...
  • Page 281 Index Printer 6-4, 6-12 Replacement Servicing Check Printer 3-15 connectors 5-14 cable/assembly control keys 2-29 electrical assemblies placement 4-2 ECG functions 2-19 flex/internal Event Summary 7-6 Key Components 5-2, connections 4-2 Extended Self Test 2- 5-25 instrument reassembly M4735A Unit operational problems Exchange Key Components 4-1...
  • Page 282 Index SpO2 PCA 6-4 Tool requirements 4-3, 5- User Interface Test 2-5 replacement 4-60, 5- Audio Test 2-30 Top case assembly 4-79, Controls 2-28 test 2-27 5-14 Display Test 2-30 Status message 2-34 Trace, ECG 3-19 Printer Test 2-31 Stop Pacer 3-16 Training required 7-18 User maintenance 1-2 Subassembly replacement...
  • Page 284 M4735-90900 Printed in USA October 2004 Third Edition *M4735-90900*...