Philips M2922 Service Manual

FM-2 (M2922A) Antepartum Fetal Monitor

SERVICE GUIDE

M2922-9000B Printed in Germany March 2002 Edition 1

Notice

Philips Medizinsyteme Boeblingen GmbH Hewlett-Packard Strasse 2 71034 Boeblingen Germany

Trademarks

Microsoft Windows and company names mentioned may be the trademarks of their respective owners.

Printing History

M2922-9000A . .08/01 M2922-9000B . .02/02

is a U.S. registered trademark of Microsoft Corp.

and Windows N T® are U.S. registered trademarks of Microsoft Corp. All other product

Conventions Used in This Guide

Warning A warning alerts you to a potential serious outcome, adverse event or safety hazard. Failure to

observe a warning may result in death or serious injury to the user or patient.

Caution A caution alerts you where special care is necessary for the safe and effective use of the product. Failure to observe a caution may result in minor or moderate personal injury or damage to the product or other property, and possibly in a remote risk of more serious injury.

Note— A note calls your attention to an important point in the text.

On your monitor, this sign indicates that there is detailed information in this book which you must read before proceeding wi th your task

Caution

US law restricts this device to sale by, or on the order of, a physician.

Contents

1. General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Who Should Read This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

What to Do Next . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Repair Strategy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Warnings, Cautions, and Notes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Symbols and Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Packing for Shipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

General Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Repacking in Original Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Repacking in a Different Carton . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Overview Of The Device . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

General Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Block Diagram of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Mechanical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

LCD and Backlight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Serial I/O Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Parallel I/O Communications Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Keypad and Navigation Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Measurements Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Ultrasound Channel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Toco Channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Mountings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Routine Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2. System Interfaces. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Serial I/O Communications Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Supported Modems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

MultiTech Systems MT-5600ZDX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Nokia 6210GSM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Parallel I/O Communications Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Contents v

3. Tests and Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Service Philosophy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Overview of the Service Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .19

Checking the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

Visual Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

FM-2 Power-On Self-Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

What Happens During the Power-On Self Test . . . . . . . . . . . . . . . . . . . . . . . .20

Performing the Power-On Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21

Performance Test for Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22

Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

4. Power-up Default Settings and the Service Menu . . . . . . . . 25

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Power-up Defaults Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

Service Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26

Error Log. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28

System A/D Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

5. Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Initial Trouble Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32

Power Problem Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33

Diagnostic Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

Diagnostic/Repair Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .34

Monitoring Degradation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Diagnostic Flow Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .35

Diagnostic Repair Actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .36

6. Disassembly/Reassembly Guide . . . . . . . . . . . . . . . . . . . . . 37

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

How to Use this Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Tools Required . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39

Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Closed Case Disassembly/Reassembly Procedures . . . . . . . . . . . . . . . . . . . . . . .40

vi Contents

Removing the Speaker Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41

Replacing the Speaker Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Removing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Replacing the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Battery Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

Separation of Front and Rear Case Assemblies . . . . . . . . . . . . . . . . . . . . . . . . . 45

Separation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46

Front Case Disassembly/Reassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . 47

Removing the Navigation Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47

Replacing the Navigation Wheel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

Removing the Main PCB Assembly from the Front Case Assembly . . . . . . 49

Removing the LCD Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50

Replacing the LCD Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51

Replacing the Main PCB Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

Removing the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Replacing the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Rear Case Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

Removing the Rear Connector PCB and the Interface Board . . . . . . . . . . 55

Removing the Interface PCB from the Rear Connector PCB . . . . . . . . . . . . 56

Replacing the Interface PCB on the Rear Connector PCB . . . . . . . . . . . . . . 56

Replacing the Rear Connector/Interface PCB Assembly . . . . . . . . . . . . . . . . 57

Removing the Handle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Removing the Foot Cushions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Main PCB Disassembly Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

Removing the Side Panel and Side Connector PCB . . . . . . . . . . . . . . . . . . 59

Replacing the Side Panel/Side Connector PCB . . . . . . . . . . . . . . . . . . . . . . .61

7. Spare Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Small Parts Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Exchange Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Monitor (M2922A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Recorder (M2925A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Non-Exchange Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65

Supplies and Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

Breakdown of Spare Parts Kits by Component . . . . . . . . . . . . . . . . . . . . . . . . . . 66

M2922-64003 - Small Parts Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66

M2922-64001 - Housing Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Contents vii

M2922-64002 - Speaker Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68

M2922-40003 - Battery Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

M3921-60406 - Knob (Navigation Wheel) Kit . . . . . . . . . . . . . . . . . . . . . . . . .69

M2922-44301 - Keypad Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

M2922-64004 - Display Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .69

M2922-66505 - Side Connector PCB Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

M2922-66510 - Interface PCB Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

M2922-66511 - Rear Connector PCB Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . .70

Assembly Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .71

8. Test and Inspection Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .77

Cautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .79

When to Perform Tests Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .80

Battery Charging and Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82

Using the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Low Power Warning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .82

Recharging the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Storing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .83

Safety Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .84

Safety Test Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Ground Integrity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Electrical Leakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

Safety Test 1: Enclosure Leakage Current Test . . . . . . . . . . . . . . . . . . . . . . .86

Safety Test 2: Patient Leakage Current Test . . . . . . . . . . . . . . . . . . . . . . . . . . 88

System Safety Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .89

Testing Transducers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Testing Toco Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

Testing Ultrasound Transducers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .92

viii Contents

List of Tables

Table 1 Fully wired DB9 RS-232 Null-modem pinouts . . . . . . . . . . . . . . . . . . 14

Table 2 MultiTech MT-5600ZDX initialization string commands . . . . . . . . . .16

Table 3 FM-2 Error Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

Table 4 Power-Up Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Table 5 Service Menu Entries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Table 6 Exchange Assemblies - M2922A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 7 Exchange Assemblies - M2925A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Table 8 Non-Exchange Assemblies - M2922A. . . . . . . . . . . . . . . . . . . . . . . . . . 65

Table 9 Supplies and Accessories - M2922A . . . . . . . . . . . . . . . . . . . . . . . . . .66

Table 10 M2922-64003 Small Parts Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .66

Table 11 M2922-64001 Housing Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .67

Table 12 M2922-64002 Monitor Speaker Kit . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Table 13 M2922-40003 Battery Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .68

Table 14 M2922-60406 Knob (Navigation Wheel) Kit . . . . . . . . . . . . . . . . . . . .69

Table 15 M2922-44301 Keypad Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 16 M2922-64004 Display Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69

Table 17 M2922-66505 Side Connector PCB Kit . . . . . . . . . . . . . . . . . . . . . . . .70

Table 18 M2922-66510 Interface PCB Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Table 19 M2922-66511 Rear Connector PCB Kit . . . . . . . . . . . . . . . . . . . . . . . . 70

Table 20 FM-2: When to Perform Test Blocks . . . . . . . . . . . . . . . . . . . . . . . . . .80

Table 21 Test and Inspection Matrix. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81

Table 22 Enclosure Leakage Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .87

Table 23 Patient Leakage Current Values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89

List of Tables ix

List of Figures

Figure 1 FM-2 Block Diagram of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Figure 2 Error Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Figure 3 System A/D Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Figure 4 Diagnosing Malfunction - Initial Diagnosis . . . . . . . . . . . . . . . . . . . . .32

Figure 5 Power Diagnosis - Power Supply or Display . . . . . . . . . . . . . . . . . . .33

Figure 6 Monitoring Degradation, Diagnostic Flow Chart . . . . . . . . . . . . . . . . 35

Figure 7 Assembly Drawing (Sheet 1) - Top Level Assembly . . . . . . . . . . . . . .71

Figure 8 Assembly Drawing (Sheet 2) - Front Case Assembly . . . . . . . . . . . . .72

Figure 9 Assembly Drawing (Sheet 3) - Rear Case Assembly . . . . . . . . . . . . .73

Figure 10 Assembly Drawing (Sheet 4) - Interface PCB/Rear Connector PCB 74 Figure 11 Assembly Drawing (Sheet 5) - Side Connector PCB/Panel/Label . .75

Figure 12 Testing a Toco Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

Figure 13 Testing an Ultrasound Transducer . . . . . . . . . . . . . . . . . . . . . . . . . . . 92

Figure 14 Position Of Crystals in an Ultrasound Transducer . . . . . . . . . . . . . .93

Figure 15 Testing the Crystals in an Ultrasound Transducer . . . . . . . . . . . . . .93

List of Figures xi

Introduction

General Information

This guide tells you how to service and repair the monitor (M2922A). It describes the system hardware and software, tells you how to diagnose operating and servicing problems, and how to test the system.

As this monitor is intended to be installed by the customer, refer to the Instructions for Use for details of how to install the monitor.

The FM-2 Antepartum Fetal Monitor Service Guide supplements the maintenance and troubleshooting procedures carried out by the operator that are described in the Instructions for Use. Refer to the Instructions for Use for maintenance and troubleshooting procedures that may be performed during normal operation.

Any other maintenance and repair procedures beyo nd the level covered in the Instructions for Use are limited to replacement of:

• the battery

• three board assemblies inside the case (but excluding the main PCB)

•the speaker

• components of the LCD display installe d in the front case assembly The features available on the monitor you are servicing depend on which

accessories were purchased. As this manual covers all accessories, consult your configuration listing to see which apply to your monitor.

As the only support strategy for the Recorder is unit exchange, in the event of a malfunction or failure, no repair or servicing information for it is included in this manual. For rout ine care and main tenance, refe r to the Instructions for Use.

Only qualified service personnel should attempt to disassemble the monitor, or to remove or replace any internal assemblies.

Chapter 1 - General Information 1

Repair Strategy

Who Should Read This Guide

This guide is for any technical personnel servicing and repairing the FM-2 monitor (M2922A).

You must:

• understand English

• be familiar with standard medical equipment installation procedures

• be familiar with current conventional technical terms as used throughout

this guide

What to Do Next

Familiarize yourself with the contents of this guide before attempting to service or repair the monitor.

Repair Strategy

Reading operating error messages and the error log helps to determine whether a fault is a hardware or software problem. Fault rectification is accompli shed by replacement of the defective part at the assembly level. For example, faults may be repaired by replacement of a complete board where the fault is identifi ed, or by exchanging the monitor.

Repair or re place ment of ind ividual components on the bo ards is not s upported, and should never be attempted.

There are no servicing instructio ns in this manual for the Recor der (M2925A) as a repair is effected by exchanging the unit only.

After any repairs you must carry out the following tests:

• Pow er-On Sel f-Test (see “FM-2 Power-On Self-Test” on pa ge 20)

• Performance tests (see “Testing Transducers” on page90)

• Safety tests after repair (see “Safety Testing” on page 84)

2 Chapter 1 - General Information

Warni ngs, Cautions, and Notes

This guide uses three terms that are important for proper servicing of the monitor: Warning, Caution, and Note.

Warning A warning calls your attention to an action or a possible situation that may

result in injury or death to you or the patient.

Caution A caution precedes an action that may result in damage to, or malfunction of the monitor. It indicates that special care is necessary for the safe and effective servicing of the monitor.

Note—A note calls your attention to an imp ortant point in the text.

Warnings, Cautions, and Notes

Chapter 1 - General Information

On your monitor, this sign indicates that there is detailed information in this book and the

Use

which you must read before proceeding with your

Instructio ns for

task.

Symbols and Definitions

Symbol Definition Symbol Definition

Remote marker input connector symbol on monitor

Class II equipment symbol (double insulation)

220-240V~ 50-60 Hz,

0.08A

15V ∼ 1A

Drip-proof equipment classification on monitor

Power input symbol on power supply

Power supply connector symbol on mon itor

Power s upply o utput connector on power supply

Functional earth s ymbol on power supply

Type BF applied part symbol on monitor

Refer to accompanying documents

RS-232 connector (symbol on monitor housing)

RS-232

RS-232 connector (symbol on monitor label)

Printer connection symbol on monitor

Indoor use only symbol on power supply

4 Chapter 1 - General Information

Packing for Shipment

General Instructions

To ship the monitor for any reason, follow the instructions in this section. Pack the moni tor carefully. Fa ilu re to follow the instructions in this section may

result in loss or damage not covered by the warranty. If the original shipping carton is not available, use another suitable carton.

Repacking in Original Carton

If available, use the origin al carton and packing materials. Pack the monitor as follows:

1. Place the monitor and, if necessary, accessory items in original packaging.

2. Place in shipping carton and seal carton with packaging tape.

3. Label carton with shipping addre ss and return address.

Repacking in a Different Carton

Packing for Shipment

If the original carton is not available, use the following procedure to pack the monitor.

1. Place the monitor in a plastic bag.

2. Locate a corrugated cardboard shipping carton with at least 200 pounds per square inch (psi) bursting strength.

3. Fill the bottom of the carton with at least 2 inches of packing material.

4. Place the bagged unit on the layer of packing material and fill the box completely with packing material.

5. Seal the carton with packing tape.

6. Label the carton with the shipping ad dress and return address.

Chapter 1 - General Information

Overview Of The Device

General Description

The device description included in this chapter focuses on the functional performance of the rep lacea ble as semb lies that may be i dentif ied a s the pr ob able cause of an apparent malfunction.

Refer to the Instructions for Use for information about the operation of the monitor and of the Recorder. That manual includes descriptions of the installation an d setup of the monitor, modes of operation, recor ding of r eal-ti me patient data, and transmission of patient data to local or remote PCs.

6 Chapter 1 - General Information

Block Diagram of Operation

Figure 1 illustrates the functional operation of the monitor, including the accessories and options. It incorporates features of the mechanical design, indicating the physical relationship of the assemblies and components.

Overview Of The Device

Figure 1 FM-2 Block Diagram of Operation

Chapter 1 - General Information

Mechanical Descrip tio n

Mechanical Description

As indicated in F igure 1, ex cept for the ba ttery, speaker, interface board, a nd rear connector board, all functioning co mponents of the mo nitor are i nstalled as subassemblies of the case fr ont-cov er assembly. There are four sockets (even t marker , Toco and two US) accessible on the left side panel. Thes e a re mounted on a side connector PCB, which is itself mounted on the main PCB.

The case rear-cover assembly i ncludes the replaceable battery and the speaker assembly. The rear cover provides openings through which the three rear connector board-mounted connectors (serial, parallel and power input) are accessible. Additional mechanical features are included in Chapter 6, “Disassembly/Reassembly Gui de”.

LCD and Backlight

The LCD panel is a monochrome LCD display. It is a single-panel display with a resolution of 320 X 240 pixels. Data to be displayed are stored in the main board. Direct connection to the LCD panel is made through on-board header assembly J7.

The backlight of the LCD is a Cold Cathode Fluorescent Lamp (CCFL) mounted as part of the L CD panel. The A C high-vo ltage is turned on and of f by a digital control bit from the main-board-m ounted drive.

Serial I/O Communications Port

The RS-232 interface is total ly isol ated fr om the interface boar d t hrough the use of high-speed optical isolators a nd isolated 5-volt power supply.

See Chapter 2, “System Interfaces” for serial connections, pinouts, cables and supported modems.

Parallel I/O Communications Port

The parallel communications port is used to connect the monitor to the Recorder or to a standard PCL Level 3 printer. At the time of printing, not all PCL Level 3 printers are supported. For printers that have been validated for use

8 Chapter 1 - General Information

with the monitor, please see “Parallel I/O Communications Interface” on page 18.

For further detail s of the pinouts and the cable specifications, see Chapter 2, “System Interfaces”.

Keypad and Navigation Wheel

There are seven front-panel switches, two LEDs, and one wheel push-button switch. All of these buttons go to the main-board except for the ON/OFF push button, which goes directly to the power supply. The software monitors these signals to determine which buttons were pushed. The two LEDs are located on the control panel and inform the user of mains or battery operation.

The wheel consists of a mechanical rotary encoder wheel with a momentary push button switch. As the knob is rotated, quadrature-coded outputs are generated. The phase rela tionship betw een the two signals, in quadrat ure, reflect the clockwise or counter clockwise rotation of the wheel. This relationship is translated to move the cursor on the LCD display forward or backward, depending on which way the wheel is rotated.

Mechanical Descrip tio n

Power Supplies

The unit is operated from a 6-volt 4 AH sealed lead acid battery. The power supply provides enough power to charge the battery even when the unit is operating.

The monitor power is controlled by alternate button closures of the front panel membrane switch. Unit operation starts only via a push of the front panel button, but operation will stop after a delay of a few secon ds when pushing the front-panel membrane switch. This delay permits the main-board processor to shut down in an orderly fa sh ion, after storing t he parameters and dat a, if any.

Chapter 1 - General Information

Measurements Channels

Ultrasound Channel

The monitor has two ultrasound sockets, US 1 and US 2, located on the side panel of the monitor. Either one or two M1356A ultrasound transducers can be connected. The latter case allows twins monitoring. (Refer to the

Use

for transducer specifications).

The transmitter pulsing the ultrasound transducer is gated by control circuitry, and return signals are processed in the CODEC circuitry on the main board.

Toco Channel

The Toco circuit uses a Wheatstone bridge, with two strain gauge elements mounted on a load beam. The differential output voltage is proportional to the force applied to the load beam through the plunger. The Toco circuit is powered from a single regulated 5V-supply excitation.

The amplified and filtered TOCO signal is converted by a 12-bit analog to digital converter, providing an output scale of 2.56LSBs/gram.

Instructions for

Mountings

The monitor can be mounted in two ways using the following optional items:

• GCX roll stand (M3909A)

• GCX wall-mount (M3904A)

Refer to the fitting instructions that come with the relevant option.

10 Chapter 1 - General Information

Routine Maintenance and Cleaning

For detailed instructions on how to clean the monitor and the monitoring accessories, see the

For instructions on cleaning the Recorder, refer to the Instructions for Use.

Instructions for Use.

Routine Maintenance and Cleaning

Chapter 1 - General Information

Routine Maintenance and Cleaning

12 Chapter 1 - General Information

Overview

The monitor has the following system interfaces:

• Serial I/O interface

• Parallel I/O interface

Note—The serial and parallel interfaces are not electrically isolated against each other.

Serial I/O Communications Interface

System Interfaces

The RS-232 interface is totally isolated fro m the interface board thro ugh the use of high-speed optical isolators and isolated 5-volt power supply.

The RS-232 communications interface port is for communicating with:

• a desktop modem (see “Supported Modems” on page 14)

• a GSM cell phone modem (see “Supported Modems” on page 14)

• a PC/AT computer

The RS-232 communications protocol supports connections to OB These connections are:

• direct (cable) connection to the OB patient data (System Online).

• via modem to supply complete patient records (System Batch).

It will also be used for software upgrades in the future.

Chapter 2 - System Interfaces 13

TraceVue system, to supply real-time

TraceVue.

Supported Modems

The pinouts for the DB9 connector are shown in the following table.

Table 1 Fully wired DB9 RS-232 Null-modem pinouts

Connects

to pin

Signal Details

1 and 6 4 DTR Data Term inal Ready 2 3 TxD Transmit data to external devices 3 2 RxD Receive data to external devices 4 1 and 6 DCD, DSR Data Carrier Detect, Data Set

Ready 5 5 Gnd RS-232 Ground 78 CTS Clear To Send 87 RTS Request To Send 9 9 - Ring indicator, not connected

The cable (M1380-61624) is a 3 meter long, fully wired RS-232 Null-modem cable supplied with the viewer software. It is also available as an OB

TraceVue

option.

Supported Modems

Note—As modems are not designed to fu lfil t he elect rical re quirements of a medical device in terms of leakage current and isolat ion, a modem mus t be located outside of the patient vicinity.

The following modems are the only modems that are currently validated and supported:

14 Chapter 2 - System Interfaces

• a MultiTech Systems MT-5600ZDX desktop modem

• a Nokia 6210GSM cellular phone modem (GSM type)

MultiTech Systems MT-5600ZDX

Supported Modems

Modem

Default

Initialization

String

The monitor sends the following default modem initialization string:

‘ATE0X4&K0\r’

This is the first string sent by the monitor, and it is not customizable, nor is it obvious to the user.

The monitor expects to se e an “OK” come back from the modem after the initialization string has been sent.

If an “OK” is returned to the monitor (that is, confirmation that a modem is connected), the monitor then sends the user-customizable initialization string, preceded by “AT” and fo llowed by ”\r”.

The Attention characters, ‘AT’, at the beginning of the initialization string start the command mode. The ‘\r’ at the end represents a Return, when the characters entered in the command line and stored in the modem’s command buffer are executed. The monitor always automatically enters the Attention (AT) and Return (\r) characters.

Therefore, the user never needs to enter “AT” or “\r”. The dialing also works in the same manner. The user never needs to enter the

return “\r” after the phone number. First, the monitor sends “ATD”, then the user-entered phone number, then “\r”. “ATD” is simply the command to dial with whichever dialing method is set as the default. (The default setting as shipped is Tone dialing.)

If it is necessary to change the dialing method from Tone to Pulse, or vice versa, then this is specified in the user-ent ered initialization string.

For example, to change to the Pulse dialing method, simply enter a P in the modem initialization string.

Chapter 2 - System Interfaces

Supported Modems

150

TOCO

Communications Menu

Data Transfer Stopped Destination

Set Modem Init String

Paper Output Paper Speed

Paper Style Modem Initialization

OK Cancel Clear

Number to Dial

Return

(5)

min.

JANE DOE 194848

16:34:12 2/14/2001

Printer/Recorder Current Record

(3 cm/min)

The components of the default initialization string are explained in the following table.

Table 2 MultiTech MT-5600ZDX initialization string

commands

Command Explanation

E0 Switches to verbose mode. To establish whether a modem

connection is effective, the modem replies to the signal sent by the monitor with an ‘OK’ signal, or an error signal, rather than just a result code (e.g. 0, 1, etc.). If an ‘OK’ is received, then it is positive confirmation that the modem is connected and functional.

X4 Switches to extended result codes, along with smart dialling.

The modem checks for a dial tone, dials, then checks for a ring back or a busy signal after dialling. This is not appropriate in local exchange branches.

X0 Selects basic result codes and blind di alling (dials even if ther e

is no line), as an alternative to use in local exchange branches.

&K0 No modem initiated flow control (disables the flow control ) .

For detai le d in fo rmat io n about the MultiTech Systems MT-5600ZDX and how to set it, please refer to the modem’s Owner’s Manual.

16 Chapter 2 - System Interfaces

Nokia 6210GSM

Supported Modems

The commands above are only applicable to Rockwell/Conexant-based MultiTech Systems modems. At the time of printing, the MultiTech MT5600ZDX is the only desktop modem that has been validated for use with the monitor.

The monitor may also work with other modems, but this has not been tested, and consequently no other modems are officially supported.

Customers may use any other modem after successful verification of several trace transmissions.

Instead of a conventional wired phone connection using a desktop modem, a cellular phone can be used to transmit traces to the viewer or to OB

TraceVue.

At the time of printing, the Nokia 6210GSM is the only cellular phone to date that has been validated for use with the monitor.

Customers may use any ot her modem a fter they hav e successf ully v erified several trace transmissions.

Chapter 2 - System Interfaces

Parallel I/O Communications Interface

Caution General-purpose personal computers and modems are not designed to meet the electrical safety requirements of medical devices. The RS-232 and parallel connectors on the monitor are electrically isolated to permit safe connections to non-medi ca l d evices, which should be c o nne cted with a cable of sufficient length to prevent the non-medical equipment from contacting the patient.

If a non-medical device is connected to the serial port, a recorder or printer connected at the same time to the parallel port should be located outside the patient vicinity, as the two interfaces are not isolated against eachother.

The parallel communications port is used to connect the FM-2 to the Recorder or to a standard PCL Level 3 printer. Supported printers that have been validated at the time of printing are:

• HP Deskjet 640c

• HP Deskjet 840c

• HP Deskjet 990 CXi

• HP Deskjet 980 CXi

• HP Deskjet 960c

• HP Deskjet 840c

• HP Deskjet 640c

• HP Deskjet 350

• HP Photosmart 1215

A standard PC parallel printer cable is used (IEEE-1284 compliant). This is supplied wi th the recorder.

Although the same cable is used to connect the monitor to the Recorder or a PCL Level 3 printer, a different protocol is used for communicating between the monitor and the Recorder. This protocol does not conform to the IEEE 1284 norm, and is actually a serial connection.

18 Chapter 2 - System Interfaces

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