Philips Avalon FM20, Avalon FM30 Service manual

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Obstetrical Care

SERVICE GUIDE

Avalon Fetal Monitor

FM20 FM30

FETAL MONITORING

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Printed in Germany 07/05

*M2703-9000A*

Part Number M2703-9000A

4512 610 10021

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1Table of Contents

1 Introduction 1

Who Should Read This Guide 1 What to Do Next 1 Repair Strategy 2 Manufacturer’s Information 2 Passwords 3 Warnings and Cautions 3

2 Site Preparation 5

Introduction 5

Site Planning 5 Roles and Responsibilities 5

Site Preparation Responsibilities 5 Procedures for Local Staff 6 Procedures for Philips Personnel 7

Site Requirements 7

Space Requirements 7 Environmental Requirements 7 Safety Requirements (Customer or Philips) 8 Electrical Requirements (Customer or Philips) 8 Connecting Non-Medical Devices 8 Cabling Options and Requirements for Connection to OB TraceVue 9 Mounting Options 9 Input Devices 10

3 Installation Instructions 11

Initial Inspection 11

Mechanical Inspection 11 Electrical Inspection 11

Claims for Damage 11 Repackaging for Shipment or Storage 12 Mounting Instructions 12 Line Voltage Selection 12 Connecting the Monitor to AC Mains 12 Connecting the Monitor to Non-Medical Devices 13 Checking and Setting Line Frequency 13

Checking/Setting Paper Scale 13 Checking/Setting Paper Speed 13 PS/2 Keyboard/Mouse 14

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4 Theory of Operation 15

Monitor Hardware Overview 15 Power Supply 16 Connector Block 16 Bus Master Board 16 Main CPU Board 16 Fetal Recorder (Thermal Printer Unit) 16

Recorder Adapter Board 17 Thermal Line Printhead (TLPH) 17 Paper Sensor 17 Stepper Motor 17

LCD Display and Touchscreen 17 Noninvasive Blood Pressure Assembly 17 SpO2 Assembly 17 Input/Output Interface Boards 18 Transducer Hardware Overview 18 Tr a n s d u c e r Ty p e s 19 Functional Description of the Transducer CPU 19

CPU (Micro Controller) 19 Analog-to-Digital Converter 19 Communication Transceiver (CAN Bus Driver) 19 EEPROM 19

Toco Transducer Frontend 19 Ultrasound Transducer Frontend 20 Toco+ Transducer Frontends 20

To co Fr o n te n d 20 IUP Frontend 20 ECG Frontend 20

5 Interfaces 21

LAN / RS232 Interface 21 Dual PS/2 Interface 21

6 Testing and Maintenance 23

Recommended Frequency 23 When to Perform Test Blocks 24 Test Reporting 25 How to Carry Out the Test Blocks 25 Preventive Maintenance Procedures 26 Other Regular Tests 26

Visual Check 26 Fetal Recorder Maintenance 26 Testing Transducers and Patient Modules 26

Ultrasound Transducer Electrical Check 26 Toco Transducer Electrical Check 28

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Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): DECG Mode 28 Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): MECG Mode 29 Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): IUP Mode 30

Performance Assurance Tests 31

Noninvasive Blood Pressure Performance Tests 31

Accuracy Test 31 Leakage Test 32 Linearity Test 32 Valve Test 32

SpO2 Performance Test 32

Safety Tests 33

Warnings, Cautions, and Safety Precautions 33 Electrical Isolation Diagram 34 Safety Test Procedures 34

S(1): Sum of Functional Earth and Enclosure Leakage Current Test 34 S(2): Patient Leakage Current - Single Fault Condition (SFC), Mains on Applied Part 35

System Test 36

What is a Medical Electrical System? 36 General Requirements for a System 36 System Example 36

Touchscreen Calibration 37 Disabling/Enabling Touch Operation 38 Checking the Fetal Recorder Offset 39 Setting the Fetal Recorder Offset 39 Fetal Recorder Selftest Report 40

7 Troubleshooting 41

Who Should Perform Repairs 41 Replacement Level Supported 41 Hardware Revision Check 41 Software Revision Check 42 Obtaining Replacement Parts 42 Troubleshooting Guide 42

Checks for Obvious Problems 42 Checks Before Opening the Instrument 42

Checks with the Instrument Switched On, AC connected 43 Individual Parameter INOPs 43 Initial Instrument Boot Phase 44

Troubleshooting Tables 44

How to Use the Troubleshooting Tables 44 Boot Phase Failures 45 Screen is Blank 46 Touchscreen Not Functioning 46 General Monitor INOP Messages 47 Keyboard/Mouse Not Functioning 48 Alarm Tones 48

iii

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Alarm Behavior 48 Fetal Recorder 48 LAN / RS232 51 Tr a n s du c e r s 5 2

Status Log 53 Troubleshooting with the Support Tool 54 Troubleshooting the Individual Measurements or Applications 54

8 Disassembly and Reassembly 55

Introduction 55 Serial Numbers 56 Removing the Top Cover Assembly 57 Removing the Display Assembly 59 Replacing the Display Assembly 62 Recorder Disassembly 64

Removing the Drawer Assembly 64 Replacing the Drawer Assembly 66 Removing the Recorder Chassis 68 Removing the Thermal Line Printhead (TLPH) 72 Replacing the TLPH 73 Replacing the Recorder Chassis 74 Removing the Paper Sensor Assembly 75 Replacing the Paper Sensor Assembly 75 Removing the Recorder Adapter Board 75 Replacing the Recorder Adapter Board 77 Removing the Stepper Motor 78

Replacing the Stepper Motor 79 Replacing the Top Cover Assembly 80 Removing the Power Supply Assembly 81 Replacing the Power Supply Assembly 82 Removing the Noninvasive Blood Pressure Assembly 82 Replacing the Noninvasive Blood Pressure Assembly 84 Removing the SpO2 Assembly 85 Replacing the SpO2 Assembly 86 Removing the Interface Boards 87 Removing the Main CPU Board 88 Replacing the Main CPU Board 89 Exchanging the Loudspeaker 89 Exchanging the Transducer Cable 90 Exchanging the Transducer Belt Button 92

9 Parts 95

Monitor 95 Tr a n s d u c e r s 96 Patient Modules 97 Mounting Hardware 97

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Assembly and Kit Contents 98

Bottom Housing Assembly (M2703-64101) 98 Power Supply Assembly (M2703-60001) 99 Top Cover Assembly (M2703-60052) 99 Top Cover Housing (M2703-64102) 100 Stepper Motor Assembly (M2703-60004) 100 Paper Sensor Assembly (M2703-60003) 100 Drawer Assembly (M2703-64651) 100 Display Assembly (M2703-64503) 101 Transducer Cable Assembly (M2735-64201) 101 Small Parts Kit - Top (M2735-64202) 102 Small Parts Kit - Bottom (M2703-64203) 102 Belt Button Kit (M2703-64204) 102

10 Upgrades 105

11 Understanding Configuration 107

What is Configuration Mode? 107 Understanding Settings 108 Entering and Leaving Configuration Mode 108 Storing Changes in the User Defaults 109 Loading the Factory Default 109 Loading the User Defaults 110 Loading Configurations Using the Support Tool 110 About Configuration Files (.cfg) 111 Selecting the Correct Configuration 111

12 Configuration Settings Appendix 113

Documenting Monitor Configurations 113 Using the Configuration Tables 113

Configuration Table Example 114

Understanding Configuration Implications 114 Measurement-Related Settings 115

Color Configuration 115 Configuring FHR (Ultrasound) 115

FHR Configuration Implications 115

Configuring Toco 116 Configuring IUP 116 Configuring DFHR (DECG) 116

DFHR Configuration Implications 116

Configuring MHR (ECG) 117

ECG Configuration Implications 117

Configuring Pulse 118 Configuring SpO

Configuration Implications 119

SpO

Configuring Noninvasive Blood Pressure (NBP) 119

119

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NBP Configuration Implications 120

Monitor-Related Settings 121

Configuring Alarms 121

Alarm Settings Configuration Implications 121

Configuring the NST Timer 122

NST Timer Configuration Implications 122

Configuring Fetal Recorder Settings 122

Recorder Configuration Implications 123

Configuring User Interface Settings 123

User Interface Configuration Implications 124

Hardware Settings 124 Global Settings 125

Global Settings Configuration Implications 125

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1Introduction

This Service Guide contains technical details for the Avalon FM20 and FM30 Fetal/Maternal Monitors. It provides a technical foundation to support effective troubleshooting and repair. It is not a comprehensive, in-depth explanation of the product architecture or technical implementation. It offers enough information on the functions and operations of the monitoring systems so that engineers who repair them are better able to understand how they work. It covers the physiological measurements and the monitor hardware that acquires and displays them.

The Avalon FM20/FM30 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.

Only qualified service personnel should attempt to install the system, disassemble the monitor, remove or replace any internal assemblies, or replace the transducer cable or belt buttons.

Who Should Read This Guide

This guide is for biomedical engineers or technicians responsible for troubleshooting, repairing, and maintaining Philips’ Avalon fetal monitors.

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 and the Instructions for Use before attempting to service or repair the system.

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1 Introduction Repair Strategy

Repair Strategy

The Service Support Tool software helps you to determine whether a fault is a hardware or software problem. The main replaceable parts are:

• unit exchange for the transducers

•replacement of – the top cover assembly – the bottom housing – the power supply assembly – the display assembly – the recorder adapter board – the paper drawer assembly – the paper sensor assembly – the stepper motor assembly –the SpO – the noninvasive blood pressure assembly –the main CPU board – the bus master board – the socket connector block –the transducer cable – the transducer belt button

See Chapter 9, “Parts” for part numbers, and Chapter 8, “Disassembly and Reassembly” for repair details.

assembly

Repair or replacement of individual components on the boards is not supported, and should never be attempted.

For tests that you are required to perform after repairs, refer to “When to Perform Test Blocks” on page 24.

Manufacturer’s Information

Philips Medizin Systeme Böblingen GmbH

Hewlett-Packard-Str. 2

71034 Böblingen, Germany

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Passwords 1 Introduction

Passwords

In order to access different modes within the monitor a password may be required. The passwords are listed below.

Monitoring Mode: No password required

Configuration Mode: 71034

Demo Mode: 14432

Service Mode: 1345

Refer to Chapter 11, “Understanding Configuration” before making any changes to the monitor configuration.

Warnings and Cautions

In this guide:

•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.

•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.

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1 Introduction Warnings and Cautions

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Introduction

This section describes the procedures you should follow to plan and prepare a site for an Avalon FM20/FM30 fetal monitor installation.

• Site planning.

• Roles and responsibilities for local and Philips personnel.

Site Planning

The careful planning of the site for the FM20/FM30 monitor is essential for its safe and efficient operation. A consulting schedule should be established between the Customer and Philips Sales and Support Representatives, to ensure that all preparations are completed when the system is delivered.

2Site Preparation

The site planning phases prior to equipment installation are:

Location: Planning the location of the various system components.

Environment: Confirming and correcting, as necessary, the environment of the proposed installation

site(s).

System Capabilities: Explaining the possibilities for system expansion.

Mounting: Referencing the mounting hardware information website for the listing of suitable

mounting hardware recommended for use with the various system components, and all details on the available mounts and accessories.

Cabling: Identifying the requirements for the cabling, conduiting and faceplates for connecting the various system components.

Roles and Responsibilities

This section describes the procedures necessary to prepare a site for a system installation. The procedures are grouped into two parts: procedures that local staff or contractors are responsible for, and procedures that Philips personnel are responsible for.

Site Preparation Responsibilities

Local Staff

• Ensure that all safety, environmental and power requirements are met.

• Provide power outlets.

• Prepare mounts, and consult Philips for detailed mounting requirements.

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2 Site Preparation Introduction

• Pull cables, install conduit, install wallboxes.

Philips Personnel

• Provide the customer with the safety, environmental and power requirements.

•Assemble mounts, as necessary.

• Provide requirements for cabling.

Procedures for Local Staff

The following tasks must be completed before the procedures for Philips personnel may be started.

• Providing Power Outlets

Provide a power outlet in the vicinity (1 m or 3 ft) or any peripheral equipment.

WARNING Only the power cables provided with the system may be used. For reasons of safety, power (mains)

extension cables or adapters shall not be used.

• Preparing Mounts

Where ceiling, wall, or shelf mounts are required for mounting the equipment, the customer is responsible for the following:

– Providing and installing all hardware which is required to install the mounting hardware supplied

by Philips as detailed in the installation notes.

– Making sure that all ceilings, walls, and mounting rails that supports mounting hardware are

suitable for their proposed load.

WARNING It is the customer's responsibility to have the attachment of the mounting hardware to the ceiling, wall,

or mounting rail and the construction of the ceiling, wall, or mounting rail evaluated for structural integrity and compliance with all local, state and any other required codes by a registered, professional, structural and/or mechanical engineer.

Although considerable effort has been made to ensure the safety of the ceiling mount installation and or mounting guidelines, it is to be understood that the installation itself is beyond the control of Philips Medical Systems. Accordingly, Philips Medical Systems will not be responsible for the failure of any such installation.

• Providing Conduit

– Providing conduit and/or trunking of a sufficient cross-sectional area for the planned cables and

possible future expansion (for additional components or systems).

– Providing and/or installing suitable wall boxes to accommodate the faceplates.

•Pulling Cables

WARNING NEVER run power cables through the same conduit or trunking used for system cables.

•Installing Wall Boxes

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Site Requirements 2 Site Preparation

It is the customer's responsibility to provide and install wallboxes to house faceplates. The customer must notify the Philips installation coordinator of which size is to be used.

Procedures for Philips Personnel

Before you begin the procedures in the installation sections, ensure that the customer has completed all necessary preparations outlined in the previous section, “Procedures for Local Staff.”

Site Requirements

The site requirements are listed in this section.

Space Requirements

The situating of the monitor should be planned such that the nursing staff are able to monitor the patient with relative ease, with all patient connectors and controls readily available and the displays clearly visible. The location should also allow access to service personnel without excessive disruption and should have sufficient clearance all round to allow air circulation.

Dimensions and weight:

Monitor:

Size (W x H x D): 335 x 286 x 133 mm (13.2 x 11.3 x 5.2 in)

Weight; 5.1 kg (11.2 lb)

Transducer:

Size (diameter): 83 mm (3.27 in)

Weight (without cable): 190g (6.7 oz.)

Environmental Requirements

The environment where the FM20/FM30 monitor will be used should be reasonably free from vibration, dust and corrosive or explosive gases. The ambient operating and storage conditions for the FM20/FM30 monitor must be observed. If these conditions are not met, the accuracy of the system will be affected and damage can occur.

Monitor (M2702A/M2703A)

Temperature Range Operating 0°C to 45°C (32°F to 113°F)

Storage

Humidity Range Operating <95% relative humidity @ 40°C/104°F

Storage

Altitude Range Operating -500 to 3000 m/-1640 to 9840 ft.

Storage

-20°C to 60°C (-4°F to 140°F)

<90% relative humidity @ 60°C/140°F

-500 to 3000 m/-1640 to 9840 ft.

Transducers (M2734A/M2735A/M2736A)

Temperature Range Operating 0°C to 40°C (32°F to 104°F)

Storage

-40°C to 60°C (-40°F to 140°F)

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2 Site Preparation Site Requirements

Transducers (M2734A/M2735A/M2736A)

Humidity Range Operating <95% relative humidity @ 40°C/104°F

Storage

Altitude Range Operating -500 to 3000 m/-1640 to 9840 ft.

Storage

SpO2 Sensors

Operating Temperature Range 0°C to 37°C (32°F to 98.6°F)

<90% relative humidity @ 60°C/140°F

-500 to 3000 m/-1640 to 9840 ft.

Safety Requirements (Customer or Philips)

The monitor is an electrical Class II device in which the protection against electric shock does not rely on basic insulation and a protective earth conductor but on double and/or reinforced insulation.

WARNING • Always use the supplied power cord with the earthed mains plug to connect the monitor to an

earthed AC mains socket. Never adapt the mains plug from the power supply to fit an unearthed AC mains socket.

• The protective earth conductor is required for EMC purposes. It has no protective function against electric shock! The protection against electric shock in this device is provided by double and/or reinforced insulation.

• Do not use additional AC mains extension cords or multiple portable socket-outlets. If a multiple portable socket-outlet without an approved isolation transformer is used, the interruption of its protective earthing may result in enclosure leakage currents equal to the sum of the individual earth leakage currents, so exceeding allowable limits.

Electrical Requirements (Customer or Philips)

Line Voltage Connection

The FM20/FM30 monitor uses < 60 W.

Line Voltage: the FM20/FM30 monitor may be operated on ac line voltage ranges of 100 to 240V (50/60 Hz).

Connecting Non-Medical Devices

The standard IEC-60601-1-1 applies to any combination of devices, where at least one is a medical device. Therefore IEC-60601-1-1 must still be met after all devices are connected.

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Site Requirements 2 Site Preparation

WARNING • Do not use a device in the patient vicinity if it does not comply with IEC-60601-1. The whole

installation, including devices outside of the patient vicinity, must comply with IEC-60601-1-1. Any non-medical device, including a PC running an OB TraceVue system, placed and operated in the patient’s vicinity must be powered via an approved isolation transformer that ensures mechanical fixing of the power cords and covering of any unused power outlets.

• Do not connect any devices that are not supported as part of a system.

Whenever you combine equipment to form a system, for example, connecting the monitor to an OB TraceVue system, perform a system test according to IEC 60601-1-1 (see “System Test” on page

36).

Figure 1 Equipment Location in the Patient Vicinity

Cabling Options and Requirements for Connection to OB TraceVue

For cabling options and requirements for connection to an OB TraceVue system, refer to the OB TraceVue Site Preparation Guide and the OB TraceVue Service Guide.

Mounting Options

See “Mounting Hardware” on page 97 for a list of mounting options. Refer to “Mounting Instructions” on page 12, or contact your local Philips representative for advice on mounting the monitor.

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2 Site Preparation Site Requirements

Input Devices

The following tables describes the input devices which can be connected to the monitor via the optional PS/2 interface.

Product Option Number

M8024A #A01 862454 9898 031 24741 Slimline Keyboard with integrated Trackball

M8024A #B01 M4046-60104 4512 610 00661 Optical Mouse USB / PS/2

M8024A #C01 M4046-60103 4512 610 00651 Wired Track Ball USB / PS2

M8024A #C02 M4046-60105 4512 610 00671 Wireless Track Ball

M8024A #C03 M4046-60106 4512 610 00681 Wired off table Track Mouse

Part Number 12NC Part

Number

Description

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3Installation Instructions

The information contained in this chapter, in addition to that given in the Instructions for Use, should enable the monitor to be installed ready for use (the preparation and planning should be adhered to as specified in the “Site Preparation” chapter). Safety checks and inspection procedures for mounts are explained in the “Testing and Maintenance” chapter, and configuration of the system is explained in the “Configuration” chapter.

Please keep the packing materials until you have completed the initial inspection, in case there is a defect on arrival.

Initial Inspection

Inspect the delivery on arrival.

Mechanical Inspection

Open the shipping container(s) and examine each part of the instrument for visible damage, such as broken connectors or controls, or scratches on the equipment surfaces. If the shipping carton/container is undamaged, check the cushioning material and note any signs of severe stress as an indication of rough handling in transit. This may be necessary to support claims for hidden damage that may only become apparent during subsequent testing.

Electrical Inspection

The instrument has undergone extensive testing prior to shipment. Safety testing at installation is not required (except in situations where devices are interconnected forming a system, see “Connecting Non-Medical Devices” on page 143). An extensive self check may be performed. This recommendation does not supersede local requirements.

All tests are described in the “Testing and Maintenance” chapter of this manual.

Claims for Damage

When the equipment is received, if physical damage is evident or if the monitor does not meet the specified operational requirements of the patient safety checks or the extended self check, notify the carrier and the nearest Philips Sales/Support Office at once. Philips will arrange for immediate repair or replacement of the instrument without waiting for the claim settlement by the carrier.

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3 Installation Instructions Repackaging for Shipment or Storage

Repackaging for Shipment or Storage

If the instrument is to be shipped to a Philips Sales/Support Office, securely attach a label showing the name and address of the owner, the instrument model and serial numbers, and the repair required (or symptoms of the fault). If available and reusable, the original Philips packaging should be used to provide adequate protection during transit. If the original Philips packaging is not available or reusable please contact the Philips Sales/Support Office who will provide information about adequate packaging materials and methods.

Mounting Instructions

Every type of compatible mounting solution is delivered with a complete set of mounting hardware and instructions. Refer to the Site prep chapter for a list of mounting options. Refer to the documentation delivered with the mounting hardware for instructions on assembling mounts.

WARNING It is the customer's responsibility to have the attachment of the mounting hardware to the ceiling, wall,

Ensure that this commitment has been met before assembling mounts.

Line Voltage Selection

You do not need to set the line voltage, as this is done automatically by the power supply. The monitor has a wide-range power supply that allows you to operate the monitor from an AC (alternating current) power source of 100 V to 240 V (± 10%) and 50 to 60 Hz (± 5%).

Connecting the Monitor to AC Mains

WARNING • Always use the supplied power cord with the earthed mains plug to connect the monitor to an

earthed AC mains socket. Never adapt the mains plug from the power supply to fit an unearthed AC mains socket.

• Do not use AC mains extension cords or multiple portable socket-outlets.

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Connecting the Monitor to Non-Medical Devices 3 Installation Instructions

Connecting the Monitor to Non-Medical Devices

Connect the monitor to an obstetrical surveillance system, such as OB TraceVue, via the optional system interface. For cabling requirements, refer to “Cabling Options and Requirements for Connection to OB TraceVue” on page 9. For safety-related information, refer to “Connecting NonMedical Devices” on page 8, and “System Test” on page 36.

Checking and Setting Line Frequency

Before using the monitor, check that the line frequency setting is correct for your location, and change the setting if necessary in Configuration Mode.

WARNING An incorrect line frequency setting can affect the ECG filter, and disturb the ECG measurement.

Ensure the line frequency setting is correct.

To set the line frequency:

1 Enter the Main Setup menu. 2 Select Global Setting s. 3 Select Line Frequency and select 50Hz or 60Hz from the pop-up list.

Checking/Setting Paper Scale

You can check the paper Scale Type (US for paper with a scale of 30-240, or Europe for paper with a scale of 50-210) in the Fetal Recorder menu. In Monitoring Mode, you can see this setting (grayed out), but you cannot change it. It can be changed in Configuration Mode.

1 Enter the Main Setup menu by selecting the SmartKey .

2 Select Fetal Recorde r.

3 Check the current setting for Scale Type. If it is not appropriate, change it in the Fetal Recorder

menu in Configuration Mode: Select Scale Type to toggle between US and Europe.

Checking/Setting Paper Speed

You can choose a paper speed of 1, 2, or 3 centimeters per minute (cm/min). The default setting is 3 cm/min.

As a change in paper speed results in a change in the appearance of a FHR trace, you are advised to ensure ALL monitors in your institution are set to the same speed.

To set the paper speed:

1 Enter the Main Setup menu using the SmartKey . 2 Select Fetal Recorder. 3 In the Recorder menu, you can see the current speed setting. Select Recorder Speed. 4 Select the desired speed from the given choices: 1, 2 or 3 cm/min.

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3 Installation Instructions Checking and Setting Line Frequency

PS/2 Keyboard/Mouse

Switch off the monitor before connecting any PS/2 compatible device.

Connect the PS/2 connector to the PS/2 Interface board in the monitor at the slot indicated by the appropriate symbol.

The default keyboard language setting for all initial configurations is “US”. However, the monitor will not automatically select the best matching language for the keyboard depending on the language of its software. This means that there is no such choice as “Automatic” for the keyboard language.

To configure the keyboard language manually, go to Service Mode, select Main Setup -> Hardware -> Keyboard and then select the proper language. Please note that this setting does not clone.

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4Theory of Operation

This chapter describes the functional operation of the monitor and the transducers. It incorporates features of the mechanical design, indicating the physical relationship of the assemblies and components.

Monitor Hardware Overview

Power Supply

Bus Master

Connector Block

SpO

Main CPU

Recorder

Adapter

Display

Adapter

IF Board 1

Thermal

Printhead

Paper Sensor

Stepper

Motor

Touch

Screen

Display Panel

Backlight

Converter

Fetal Recorder

Display Assembly

NIBP

IF Board 2

optional boards

standard boards

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4 Theory of Operation Power Supply

The monitor consists of nine main functional components:

• Power supply M2703-60001

• Connector Block (1253-8415)

• Bus Master Board (M2703-66460)

• Main CPU Board (M2703-66450)

• Fetal Recorder (Thermal Printer Unit)

• Display Assembly (M2703-64503)

• Noninvasive Blood Pressure Board (optional, M2703-64502)

•SpO

• Input /Output Interface Boards (optional):

Board (optional, M2703-66453)

– LAN / RS232 (M2703-67501)

– Dual PS/2 (M8086-67501)

Power Supply

The power supply is a wide-range input switching unit, with an output of 24V. It is located in the bottom housing assembly.

Connector Block

Any compatible fetal transducer, patient module or remote event marker can be connected in any order to the monitor via the sockets on the Connector Block. The Connector Block is located on the Bus Master Board, and is exchangeable.

Bus Master Board

The signals from the transducers or sensors are conveyed from the sensor sockets on the Connector Carrier Board (M2703-66421) to the Bus Master Board (M2703-66420).

The Bus Master Board is responsible for transducer detection, communicates with the connected transducers via a CAN bus, and communicates parameter data to the Main CPU Board via a serial link for further processing and display.

Main CPU Board

The Main CPU Board controls the monitor’s human interface, and is responsible for the final processing of data from the Bus Master Board. It sends this data to the TFT display, and to the thermal printer unit for recording traces and other patient data. It also controls the optional LAN/RS232 and PS/2 interface boards.

Fetal Recorder (Thermal Printer Unit)

The fetal recorder is located in the Top Cover Assembly. The recorder consists of the following major parts:

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LCD Display and Touchscreen 4 Theory of Operation

•Recorder Adapter Board

•Thermal Line Printhead (TLPH)

•Paper Sensor

•Stepper Motor

Recorder Adapter Board

Recorder signals are handled by the Recorder Adapter Board (M2703-66430), connected to the Main CPU Board. Video signals to the display are also wired through this board, and connection to the Display Adapter Board is made via a silver-colored 50-pin ribbon cable.

The recorder unit, including the TLPH, is connected to the Recorder Adapter Board via a white 50-pin, ribbon cable. The stepper motor and the paper sensor are also connected to the Recorder Adapter Board. The Recorder Adapter Board is connected to the Main CPU Board via a 154-pin connector.

Thermal Line Printhead (TLPH)

The TLPH is located on its own holder in the recorder chassis.

Paper Sensor

The paper sensor hardware consists of a reflective light sensor that detects the black marks on the trace paper, and paper-out. It is attached to the RFI Bracket, and connected to the Recorder Adapter Board via a removable cable connector.

Stepper Motor

The stepper motor is a bipolar motor controlled by a micro-stepping motor driver on the Recorder Adapter Board. The motor is located on the recorder chassis and is connected to the Recorder Adapter Board via a removable cable connector.

LCD Display and Touchscreen

The LCD Display Assembly consists of a four-wire resistive touchscreen, a 6.5” TFT panel, and a backlight inverter, all connected to the Display Adapter Board (M2703-66440) and fitted into the display housing.

The board is connected to the Recorder Adapter Board (M2703-66430) via a 50-pin ribbon cable. The green power LED is incorporated into the Display Adapter Board.

Noninvasive Blood Pressure Assembly

The optional Noninvasive Blood Pressure Assembly (M2703-64602) is located in the front lefthand corner of the bottom housing assembly. It is connected via a serial link to the Main CPU Board.

SpO2 Assembly

The optional SpO2 Assembly (M2703-64603) is physically located on the Bus Master Board, but sends data directly to the Main CPU Board via a serial link.

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4 Theory of Operation Input/Output Interface Boards

Input/Output Interface Boards

There are two optional interface boards available:

• LAN/RS232 Interface Board, used for connecting to a PC running the Support Tool and to a surveillance and documentation system such OB TraceVue.

• PS/2 Interface Board, used for connecting an external keyboard or mouse.

The interface boards plug into the two interface slots on the underside of the device, and are controlled by the Main CPU Board.

Transducer Hardware Overview

Analog Signal

Analog/ Digital conversion

Timing and Mode Control

EEPROM

Master Clock recovery

Signal processor

Power supply and reset

Ultrasound frontend board

or alternatively

Transducer cable

Communication Transceiver

Power and Identification

Transducer CPU board

TOCO/ECG frontend board

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Transducer Types 4 Theory of Operation

Transducer Types

Transducers consist of the following types:

•US

•Toco

They all share the same power supply, and analog-to-digital conversion circuitries. The processor software is also the same for all transducers. The frontends, however, are specific to each transducer type.

(includes DECG/MECG and IUP capability)

Functional Description of the Transducer CPU

The CPU section of the transducers is made up of the following main functional blocks:

• CPU (micro controller)

• Analog-to-Digital Converter

• Communication Transceiver (CAN bus driver)

• EEPROM

CPU (Micro Controller)

A single-chip processor is used to control the transducer, generate the frontend control signals, control the analog-to-digital signal conversion, and to perform the signal processing.

Analog-to-Digital Converter

Analog-to-digital (A/D) signal conversion is carried out by the 16-bit AD converter. Digital signals are directly communicated from the A/D converter to the CPU.

Communication Transceiver (CAN Bus Driver)

The communications transceiver (CAN bus driver) communicates directly with the transducer CPU, and allows the transducer to communicate with the Bus Master Board via the CAN bus.

EEPROM

The serial EEPROM stores all non-volatile data required to operate the transducer (for example, calibration and correction factors for frontend gains and offsets, country-specific information, serial numbers and error logs).

Toco Transducer Frontend

Uterine activity is measured by evaluating the hardness of the mother’s abdomen with a pressure sensitive resistor bridge (strain gauge sensor element). The strain gauge sensor element requires an excitation voltage and its differential output signal is proportional to the pressure applied to it. A DC excitation voltage is used, and the resulting output signal is fed directly to an A/D signal converter before being sent to the processor.

Page 28

4 Theory of Operation Ultrasound Transducer Frontend

Ultrasound Transducer Frontend

The ultrasound frontend is a pulsed Doppler system with a 1.0 MHz ultrasound frequency, and a pulse repetition rate of 3 kHz. Seven ultrasound crystals are used as transmitter and receiver.

Toco+ Transducer Frontends

Several parameter frontends are combined on one board. In addition to the Toco frontend, additional supported parameters are DECG, MECG and IUP.

A seven-pin ‘D-type’ socket carries all parameter related inputs and outputs. An external mode resistor, connected to one of the pins, automatically detects which mode to set when an adapter cable is plugged in (whether it is DECG, MECG, or IUP).

Toco Frontend

See “Toco Transducer Frontend” on page 19.

IUP Frontend

Intrauterine pressure (IUP) is measured via a piezo resistive bridge with AC excitation connected to the RA / LA input pins of the ECG amplifier. A/D conversion of the IUP signal is done by the 16-bit A/D converter.

ECG Frontend

The ECG frontend measures both DECG and MECG, using a 3-lead system (RA, LA and reference electrode). The ECG mode is automatically detected when an adapter cable is attached. Input lines are ESD protected.

Page 29

5Interfaces

There are two interface boards available as options for the Avalon fetal monitors:

• LAN / RS232 system interface

•Dual PS/2 interface

LAN / RS232 system interface

Dual PS/2 system interface

The interfaces are “plug-and-play” boards, and fit into dedicated slots on the underside of the monitor. See “Removing the Interface Boards” on page 87 for details of how to remove and fit the boards.

LAN / RS232 Interface

The LAN / RS232 system interface has two fully isolated ports:

• The LAN connection can be used for connecting the monitor to PC for configuration or upgrade using the Support Tool, and for future system expansion.

• The RS232 connection can be used for connecting the monitor to an obstetrical information and surveillance system, such as OB TraceVue.

Dual PS/2 Interface

This interface provides two PS/2 ports to enable the monitor to be connected to off-the-shelf, “plug-andplay” input devices:

• Mouse: any specified PS/2 mouse or trackball may be used for navigation and data entry.

• Computer keyboard: a PS/2 computer keyboard can be used for data entry instead of the on-screen pop-up keyboard.

Page 30

5Interfaces Dual PS/2 Interface

Page 31

6Testing and Maintenance

This chapter contains the testing and maintenance procedures to ensure the proper functioning of the monitor and accessories, covering preventive maintenance, performance assurance and safety.

Carry out the procedures as specified in the following sections.

For detailed instructions on how to clean the monitor, transducers and accessories, see the monitor’s Instructions for Use.

Recommended Frequency

Perform the procedures as indicated in the suggested testing timetable. These timetable recommendations do not supersede local requirements.

Table 1: Suggested Testing Timetable

Te s ts Frequency

Preventive Maintenance

Other Regular Tests

Performance Assurance Te s ts

Safety Tests

Noninvasive Blood Pressure Calibration Once every two years, or as specified by

local laws (whichever comes first).

Visual Inspection Before each use.

Recorder Maintenance Once a year, or if the printout is

degraded.

Testing Transducers and Patient Modules Once a year, or if you suspect the

measurement is incorrect.

Noninvasive Blood Pressure Performance Tests Once every two years, or if you suspect

SpO

Performance

Enclosure Leakage Current

Patient Leakage Current

the measurement is incorrect.

Once every two years and after repairs where the power supply is removed or replaced, or the monitor has been damaged by impact.

Page 32

6 Testing and Maintenance When to Perform Test Blocks

When to Perform Test Blocks

This table tells you when to perform specific test blocks. See page 25 for test details.

Table 2: When to perform test blocks

Service Event Test Block(s) Required - Complete these tests

Installation Perform Visual, Power On, Performance test blocks (see Table 3). Preventive Maintenance Perform Noninvasive Blood Pressure Performance tests blocks (see Table 3). Other Regular Tests and Tasks

• Visual Inspection Perform Visual test block (see Table 3).

• Transducer and Patient Module Te s ti n g

• Recorder Maintenance Regular cleaning and maintenance (see “Fetal Recorder Maintenance” on

Repairs

• Repairs when the monitor has been damaged by impact.

• Repairs where the power supply has been removed or replaced.

• All other repair events. Perform Visual, Power On and Performance test blocks (Table 3).

Upgrades

See “Testing Transducers and Patient Modules” on page 26.

page 26

Perform the recorder selftest (see “Fetal Recorder Selftest Report” on page 40).

Perform Visual, Power On and Performance test blocks, and when the monitor has been damaged by impact, or where the power supply has been removed or replaced, perform safety test blocks (see Table 3).

For upgrade information refer to “Upgrades” on page 105.

Combining or Exchanging System Components

All other service events Perform Visual, Power On and Performance test blocks

Perform Visual, Power On, Performance test blocks (see Table 3).

Perform the System Test (see Table 3 and “System Test” on page 36).

(see Table 3).

Page 33

Test Reporting 6 Testing and Maintenance

Test Reporting

Authorized Philips personnel report test result back to Philips to add to the product development database. Hospital personnel, however, do not need to report results.

How to Carry Out the Test Blocks

Key to Table 3 P = Pass, F = Fail, X = test result value to be recorded

Table 3: Test and Inspection Matrix

What to Record

Tes t B l oc k Test or Inspection to be Performed Expected Test Results

Visual Inspect the monitor, transducers, patient

modules and cables for any damage. Are they free of damage? If Yes, Visual test is passed. V:P or V:F

on Service Record (Philips Personnel o nly)

Power On Power on the unit.

Does the self-test complete successfully? If Yes, Power On test is passed. PO:P or PO:F

Noninvasive Blood Pressure Per forman ce Te s t s

SpO

Per forman ce Te s t

Safety (1) Perform Safety Test: Sum of Functional

Safety (2) Perform Safety Test: Patient Leakage Current

Perform the Accuracy Test (see page 31) X1 = value displayed by monitor

Performance Leakage Test (see page 32) X2 = leakage test value

Performance Linearity Test (see page 32) X3 = value displayed by monitor

Performance Valve Test (see page 32) X4 = value < 10 mmHg PN:P/X4 or

Perform the SpO2 Performance Test (see page 32)

Earth and Enclosure Leakage Current Normal and Single Fault Conditions.

- Single Fault Condition, mains on applied part.

Difference ≤ 3mmHg

X2 < 6 mmHg

Difference ≤ 3mmHg

Value should be between 95% and 100%

With mains cable: Maximum leakage current (X1)

≤ 100µA

Maximum leakage current (X2)

≤ 50µA @ 264V

PN:P/X1 or

PN:F/X1

PN:P/X2 or

PN:F/X2

PN:P/X3 or

PN:F/X3

PN:F/X4

No reporting necessary

S(1):P/X1 or

S(1):F/X1

S(2):P/X2 or

S(2):F/X2

System Perform the system test according to sub

clause 19.201 of IEC 60601-1-1, if applicable, after forming a system.

Enclosure Leakage Current:

≤ 100µA (Normal Condition) ≤ 300µA (Single Fault Condition)

Protective Earth Leakage Current of Multiple Portable Socket-Outlets:

≤ 500µA Patient Leakage Current: ≤ 10µA

System test:P or

System test: F

Page 34

6 Testing and Maintenance Preventive Maintenance Procedures

Preventive Maintenance Procedures

The preventive maintenance tasks are restricted to the noninvasive blood pressure measurement calibration. Carry out the noninvasive blood pressure measurement performance tests at least every two years, or as specified by local laws (whichever comes first).

Other Regular Tests

The care and cleaning requirements that apply to the monitor and its accessories are described in the Instructions for Use. This section details the periodic maintenance recommended for the monitor, transducers and accessories.

Visual Check

Check all exterior housings for cracks and damage. Check the condition of all external cables, especially for splits or cracks and signs of twisting. If serious damage is evident, the cable should be replaced immediately. On the Toco not damaged. Check that all mountings are correctly installed and secure. Refer to the instructions that accompany the relevant mounting solution.

transducer and the patient module, ensure that the adapter cable socket is

Fetal Recorder Maintenance

The recorder platen, thermal printhead and paper sensor should be cleaned at least once a year, or when needed (when traces become faint).

Clean the assemblies as follows:

• Clean the recorder platen with a lint-free cloth using a soap/water solution.

• Wipe the printhead using a cotton swab moistened with 70% Isopropyl alcohol based solution.

• Check the paper sensing mechanism is dust free.

Testing Transducers and Patient Modules

If any of the following tests fail, repeat the test using another transducer. If the second transducer passes the tests, confirming that the first transducer is defective, contact your service personnel.

If the second transducer also fails the tests, contact your Philips Service Engineer or Response Center.

Ultrasound Transducer Electrical Check

CAUTION Use of ultrasound gel that is not approved by Philips may reduce signal quality and may damage the

transducer. This type of damage is not covered by warranty.

To test an ultrasound transducer:

1 Switch on the monitor and the recorder.

2 Connect the transducer to the fetal monitor.

3 Select the fetal heart sound for this channel.

4 Increase the loudspeaker volume to an audible level.

Page 35

Other Regular Tests 6 Testing and Maintenance

The ultrasound transducer contains seven piezoelectric crystals. Basic functioning of each can be

verified by holding a flat bottomed pencil or similar above each crystal and moving it up and down as shown.

6 A sound should be heard for each crystal tested. The pencil should be held two to three centimeters

from the transducer surface when the test is carried out.

Crystals

7 A sound should also be heard when the transducer is moved back and forth over a solid surface, or

the hand as shown.

Page 36

6 Testing and Maintenance Other Regular Tests

Toco Transducer Electrical Check

To test a Toco transducer:

1 Switch on the monitor and the recorder.

2 Connect the transducer to the fetal monitor.

3 Gently apply pressure to the Toco sensor.

4 Check that the value on the display and paper shows this change in pressure.

5 Lay the transducer face up on a hard, flat surface for a few seconds.

6 Press the Toco Baseline Key to re-adjust the Toco display to 20.

7 Turn the transducer over so that the Toco sensor is resting on the flat surface. You should see a

marked increase in the value of the Toco reading in the Toco display.

Toco display = 20

Toco display = 35 - 45

Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): DECG Mode

1 Switch on the monitor and the recorder.

2 Connect the patient module or Toco

3 Attach the DECG adapter cable M1362B to the socket on the patient module or Toco

transducer to the fetal monitor.

transducer.

4 Ensure that the DFHR channel display on the fetal monitor shows the DECG LEADS OFF

INOP with the DECG adapter cable attached.

5 Take a Fetal Scalp Electrode, and connect it to the DECG adapter cable.

Page 37

Other Regular Tests 6 Testing and Maintenance

6 EITHER

Make a short between the spiral electrode and the reference electrode with your fingers (it is best to wet your fingers first). Use a sterile Fetal Scalp Electrode.

CAUTION The tip of the spiral electrode is sharp. Take care not to injure your fingers.

Spiral Electrode

Reference Electrode

Cut off the plastic tip of the fetal scalp electrode (containing the spiral and reference electrodes) from the end of the wires. Strip the insulation from the end of the wires, and connect them to a patient simulator.

Note—We do not recommend the use of a specific patient simulator. The use of a patient simulator does

not allow checking the specification of the ECG-functionality; it allows only a check of general function.

Result: the DECG LEADS OF F INOP should disappear.

If the test results are not as outlined above, repeat the test with another ECG transducer. If this does not solve the problem, try the following:

• Check tall connections.

•If the DECG LEADS OFF INOP is still displayed, the DECG adapter cable may be defective.

Replace the adapter cable.

If the problem persists, replace the transducer.

Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): MECG Mode

1 Switch on the monitor and the recorder.

2 Connect the patient module or Toco

3 Attach the MECG adapter cable M1363A to the red color-coded socket on the patient module or

transducer

To c o

4 EITHER

Attach electrodes to the M1363A adapter cable, and apply the electrodes to the skin (for example on the wrists).

Attach the M1363A adapter cable to a patient simulator.

Note—We do not recommend the use of a specific patient simulator. The use of a patient simulator does

not allow checking the specification of the ECG-Functionality; it allows only a check of general function.

transducer to the fetal monitor.

Page 38

6 Testing and Maintenance Other Regular Tests

Result: You should see MECG values displayed on the maternal display or annotated on the recorder trace.

If the test results are not as outlined above, repeat the test with another ECG transducer. If this does not solve the problem:

• The MECG adapter cable may be defective. Replace the adapter cable, and repeat the test.

• Check all connections.

Testing the Patient Module (M2738A)/Toco+ Transducer (M2735A): IUP Mode

To test the IUP functionality of the patient module or the Toco+ transducer, you need the following:

Expansion chamber

Toco+ transducer (shown) or patient module

IUP cable (9898 031 43931)

‘T’ adapter

Cut end of catheter

Manometer

IUP catheter (M1333A)

•Manometer.

• Expansion chamber.

• Three lengths of silicone tubing with a ‘T’ adapter.

1 Switch on the monitor and the recorder.

2 Connect the patient module or Toco

3 Attach the IUP adapter cable (9898 031 43931) to the socket on the patient module or Toco

transducer to the fetal monitor.

transducer.

4 Cut the sensor tip off an IUP catheter (M1333A).

5 Connect the catheter to the IUP adapter cable.

6 Connect the silicone tubing to the test volume chamber and the manometer as shown in the picture.

7 Connect the cut end of the catheter to the silicone tubing.

8 Apply a pressure of 80 mmHg ± 5 mmHg with the manometer. Check that the value on the display

and on trace corresponds to this pressure. Slowly release the pressure, and check that the value on the display and on trace shows this change in pressure.

Page 39

Performance Assurance Tests 6 Testing and Maintenance

Performance Assurance Tests

Some of the following test procedures must be performed in service mode. To enter service mode select Operating Modes in the main menu. Then select Service Mode and enter the password.

Noninvasive Blood Pressure Performance Tests

This section describes noninvasive blood pressure test procedures. The monitor must be in service mode.

Table 3 gives the expected test results for each of the tests.

Accuracy Test

This test checks the performance of the noninvasive blood pressure measurement. Connect the equipment as shown:

Expansion Chamber

Tubing

Connect to Noninvasive Blood Pressure socket

Manometer

Tools required:

• Reference manometer (includes hand pump and valve), accuracy 0.2% of reading.

• Expansion chamber (volume 250 ml +/- 10%)

• Appropriate tubing.

In service mode, the systolic and diastolic readings indicate the noise of noninvasive blood pressure channels 1 and 2 respectively. When static pressure is applied, the reading in noninvasive blood pressure channel 1 should be below 50. The value in parentheses indicates the actual pressure applied to the system.

1 Connect the manometer and the pump with tubing to the noninvasive blood pressure connector

on the monitor and to the expansion chamber.

2 In service mode, select the Setup NBP menu. 3 Select Close Valves: On

4 Raise the pressure to 280 mmHg with the manometer pump.

5 Wait 10 seconds for the measurement to stabilize.

6 Compare the manometer values with the displayed values.

7 Document the value displayed by the monitor (X1).

8 If the difference between the manometer and displayed values is greater than 3 mmHg, calibrate

the noninvasive blood pressure measurement. If not, proceed to the leakage test.

Page 40

6 Testing and Maintenance Performance Assurance Tests

To calibrate the noninvasive blood pressure measurement, select Close Valves off then

Calibrate NBP and wait for the instrument to pump up the expansion chamber.Wait a few seconds after pumping stops until EnterPrVal is highlighted and then move the cursor to the value shown on the manometer. If one of the following prompt messages appears during this step, check whether there is leakage in the setup:

– NBP unable to calibrate–cannot adjust pressure

– NBP unable to calibrate–unstable signal

10 Press Confirm.

If the INOP NBP Equipment Malfunction message occurs in monitoring mode, go back to service mode and repeat the calibration procedure.

Leakage Test

The noninvasive blood pressure leakage test checks the integrity of the system and of the valve. It is required once every two years and when you repair the monitor or replace parts.

1 If you have calibrated, repeat steps 2 to 6 from the accuracy test procedure so that you have 280

mmHg pressure on the expansion chamber.

2 Watch the pressure value for 60 seconds.

3 Calculate and document the leakage test value (X2).

Linearity Test

1 Reduce the manometer pressure to 150 mmHg.

2 Wait 10 seconds for the measurement to stabilize.

3 After these 10 seconds, compare the manometer value with the displayed value.

4 Document the value displayed by the monitor (X3)

5 If the difference is greater than 3 mmHg, calibrate the noninvasive blood pressure measurement

Valve Test

1 Raise the pressure again to 280 mmHg. 2 Select Close valves: Off.

3 Wait five seconds and then document the value displayed. The value should be less than 10

X2 = P1 - P2 where P1 is the pressure at the beginning of the leakage test and P2 is the pressure displayed after 60 seconds. The leakage test value should be less than 6 mmHg.

(see steps 9 to 10 in the accuracy test procedure).

mmHg.

4 Document the value displayed by the monitor (X4).

SpO2 Performance Test

This test checks the performance of the SpO2 measurement.

Tools required: none

Page 41

Safety Tests 6 Testing and Maintenance

Connect an adult SpO2 transducer to the SpO2 connector.

2 Measure the SpO

3 The value should be between 95% and 100%.

value on your finger (this assumes that you are healthy).

Safety Tests

You are recommended to file the results of safety tests. This may help to identify a problem early particularly if the test results deteriorate over a period of time.

Warnings, Cautions, and Safety Precautions

• These tests are a proven means of detecting abnormalities that, if undetected, could prove dangerous to either the patient or the operator.

• You can perform all tests using commercially available Safety Analyzer test equipment. You can perform basic measurements with widely available multifunction instruments such as the HP 3469A multimeter or equivalent.

• The consistent use of a Safety Analyzer as a routine step in closing a repair or upgrade is emphasized as a mandatory step to maintain approval agency status. You can also use the Safety Analyzer as a troubleshooting tool to detect abnormalities of line voltage and grounding plus total current loads.

• For Europe and Asia/Pacific, the monitor complies with: IEC60601-1:1988 + A1:1991 + A2:1995 = EN60601-1:1990 +A1:1993 + A2:1995 For USA, the monitor complies with: UL60601-1

• Additional tests may be required according to local regulations.

•Normally, a Safety Analyzer is used to perform these procedures. Popular testers include the DEMPSEY 232D, or for use in Europe, testers like the Rigel, Metron or Gerb. Follow the instructions of the Instrument manufacturer.

• Any device that is connected to the medical device must comply with IEC60601-1, and UL606011:2003 for the USA, if within the patient vicinity and be separately tested at the same intervals as the monitor. Devices forming a system must comply with IEC60601-1-1.

• Any device that is connected to the medical device must comply with IEC60601-1-1 if outside the patient vicinity and be tested accordingly.

• Perform safety tests as described on the following pages.

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6 Testing and Maintenance Safety Tests

Electrical Isolation Diagram

This diagram gives an overview of the electrical isolation of the monitor. Accessible metal parts are identified (see arrows).

Switch

Line

Protective Earth

Neutral

100V.240V

Fuses

Safety Test Procedures

Use the test procedures outlined here only for verifying safe installation or service of the product. The setups used for these tests and the acceptable ranges of values are derived from local and international standards but may not be equivalent. These tests are not a substitute for local safety testing where it is required for an installation or a service event. If using the Metron Safety tester, perform the tests in accordance with your local regulations, for example IEC60601-1, UL60601-1 (US), CD IEC62353, and IEC60601-1-1. The Metron Report should print results as detailed in this chapter, together with other data.

primary

side

Housing sheet metal

secondary side

24 V

Accessible metal parts in the top cover (accessed by opening the paper drawer)

5 V

24 V

I/O boards

30 V

22pF

5 V

(RS232)

Keyboard and

Mouse

patient modules

12 V

(US,TOCO,ECG,SpO2)

Accessible metal parts (interface slot)

S(1): Sum of Functional Earth and Enclosure Leakage Current Test

Test to perform:

This test measures leakage current of exposed metal parts of the FM20/FM30 monitor and the functional earth leakage current. It tests normal and reversed polarity. Perform the test with S1 closed (Normal Condition) and with S1 open (Single Fault Condition).

Page 43

Safety Tests 6 Testing and Maintenance

NOTE

The protective earth conductor is required for EMC purposes. It has no protective function against electric shock. The protection against electric shock is provided by double and/or reinforced insulation.

This safety test is based on IEC 60601-1 and CD IEC62353 (date of circulation:2004-04-09)

For measurement limits, refer to test block Safety (1), “Test and Inspection Matrix” on page 25.

Report the highest value.

You can find metal parts of the device:

• In the top cover (accessed by opening the paper drawer).

• In an interface slot located in the bottom housing (you need to remove the interfaces if they are fitted).

Location of metal parts

S(2): Patient Leakage Current - Single Fault Condition (SFC), Mains on Applied Part

Test to perform:

MECG Electrodes

This test measures patient leakage current from applied part to earth caused by external main voltage on the applied part of 264V. Each polarity combination possible shall be tested. This test is applicable for ECG measurement inputs.

This safety test is based on IEC 60601-1 and CD IEC62353 (date of circulation:2004-04-09)

For measurement limits and test voltage, refer to test block Safety (2), “Test and Inspection Matrix” on page 25.

Report the highest value.

Page 44

6 Testing and Maintenance System Test

System Test

After mounting and setting up a system, perform system safety tests according to IEC60601-1-1.

What is a Medical Electrical System?

A medical electrical system is a combination of at least one medical electrical device and other electrical equipment, interconnected by functional connection or use of a multiple portable socket-outlet.

General Requirements for a System

After installation or subsequent modification, a system must comply with the requirements of the system standard IEC/EN60601-1-1. Compliance is checked by inspection, testing or analysis, as specified in the IEC60601-1-1 or in this book.

Medical electrical equipment must comply with the requirements of the general standard IEC/ EN60601-1, its relevant particular standards and specific national deviations. Non-medical electrical equipment shall comply with IEC and ISO safety standards that are relevant to that equipment.

Relevant standards for some non-medical electrical equipment may have limits for enclosure leakage currents higher than required by the standard IEC60601-1-1. These higher limits are acceptable only outside the patient environment. It is essential to reduce enclosure leakage currents when non-medical electrical equipment is to be used within the patient environment.

System Example

This illustration shows a system where both the medical electrical equipment and the non-medical electrical equipment are situated at the patient’s bedside.

Key:

Non-Medical Devices

Distance to patient

must be >= 1.5m

Power cables:

Data cables:

Personal

Computer

Isolation Transformer

Medical Devices

Fetal Monitor

Page 45

Touchscreen Calibration 6 Testing and Maintenance

WARNING • Do not use additional AC mains extension cords or multiple portable socket-outlets. If a multiple

portable socket-outlet without an approved isolation transformer is used, the interruption of its protective earthing may result in enclosure leakage currents equal to the sum of the individual earth leakage currents, so exceeding allowable limits.

• Do not connect any devices that are not supported as part of a system.

• Any non-medical device placed and operated in the patient’s vicinity must be powered via an approved isolation transformer that ensures mechanical fixing of the power cords and covering of any unused power outlets.

Touchscreen Calibration

To access the touchscreen calibration screen:

1 Enter service mode 2 Select Main Setup 3 Select Hardware 4 Select Calibrate Touch

Please touch slow ly each target as it appea rs on screen. Do not power off the mo ni tor until this calib ration has completed.

Make sure you complete the calibration procedure without powering off the monitor mid-way. If the monitor is powered off after the first point is touched, the touch panel will be deactivated until the touch calibration is performed again.

Page 46

6 Testing and Maintenance Disabling/Enabling Touch Operation

If the touchscreen is accidentally mis-calibrated by selecting the wrong spot, you must use another input device to re-enter calibration mode. If you have the support tool, you can select Reset Touch Calibration to Default and it will create a rough calibration which will allow you to access the calibration menu again via the touchscreen.

Disabling/Enabling Touch Operation

To disable touchscreen operation of the monitor, press and hold the Main Screen key for about three seconds. A red padlock will blink on the key. Press and hold the Main Screen key again for about three seconds to re-enable touchscreen operation.

Page 47

Checking the Fetal Recorder Offset 6 Testing and Maintenance

Checking the Fetal Recorder Offset

The easiest way to check the recorder offset is to connect a resting Toco transducer (one that is not under any load) to the monitor and then change the offset setting until the trace is recording 20 units on the paper. Due to the delay between changing the offset setting and seeing the change on the paper, you may have to repeat this procedure to set the offset.

When viewed from the front of the monitor, 0 is the setting that prints the trace the furthest to the right, and 10 is the setting that prints the trace furthest to the left. If the trace from the resting Toco transducer is printed below the 20 unit gridline, you need to increase the offset setting. If the trace is printed above the 20 unit gridline, you need to decrease the offset setting. When the trace is recording 20 units, the offset is correctly set.

Setting the Fetal Recorder Offset

To set the fetal recorder offset, you first need to run the fetal recorder calibration:

1 In Main Setup, select Fetal Recorder to enter the Fetal Recorder menu.

The current setting for the recorder offset is shown (but it is still grayed out, and you cannot select it yet).

2 Select Calibration to start the recorder calibration printout. 3 The recorder stops, and the Cal. Offset becomes selectable. Select Cal. Offset, and

select the offset value from 0 to 10 from the list, as appropriate. The recorder then finishes the calibration printout.

4 Repeat if necessary until the trace is recording 20 units on the paper in Monitoring Mode,

matching the value displayed on the screen.

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6 Testing and Maintenance Fetal Recorder Selftest Report

Fetal Recorder Selftest Report

To verify your printer configuration, or if you doubt the performance of the recorder, you may want to print a test report.

To print a selftest report, in Service Mode, select M ain Setup -> Fetal Recorder->

Selftest.

Here is an excerpt from a sample test report to give you an idea what it looks like (the exact appearance may vary slightly):

This line should print exactly on the 20 unit gridline (Toco baseline) if the recorder is correctly calibrated

Example of selftest report

Check the test pattern to ensure all the heating elements on the printer head are operational. Ensure that:

• No more than 20 dots are missing over the entire printhead.

• No more than 2 adjacent dots are inoperative.

• No dots in the mode annotation (for example, FHR1) are inoperative.

If the any of the above conditions are not met, replace the printhead (see “Removing the Thermal Line Printhead (TLPH)” on page 72).

Ensure that all printed lines are straight. If the lines are not straight, there may be a problem with the paper recorder speed.

Page 49

7Troubleshooting

A list of system error messages and troubleshooting information for common problems you may encounter while using the monitor and its accessories is given in the Instructions for Use. This chapter provides a guide for qualified service personnel for troubleshooting problems that cannot be resolved by the user.

CAUTION If the troubleshooting procedure requires you to disassemble the monitor or transducers, be certain to follow

the disassembly and reassembly procedures given in Chapter 8, “Disassembly and Reassembly”.

Who Should Perform Repairs

Only qualified service personnel should open the monitor housing, remove and replace components, or make adjustments. If your medical facility does not have qualified service personnel, contact Philips’ Response Center or your local Philips representative.

WARNING High Voltage - Voltages dangerous to life are present in the instrument when it is connected to the mains

power supply. Do not perform any disassembly procedures with power applied to the instrument. Failure to adhere to this warning could cause serious injury or death.

Replacement Level Supported

The replacement level supported for this product is to the printed circuit board (PCB) and major subassembly level. Once you isolate a suspected PCB, follow the procedures in Chapter 8, “Disassembly and Reassembly” to exchange the PCB with a known good replacement. Check to see if the symptom disappears and that the monitor passes all performance tests. If the symptom persists, swap back the replacement PCB with the suspected malfunctioning PCB (the original PCB that was installed when you started troubleshooting) and continue troubleshooting as directed in this chapter.

Hardware Revision Check

Some troubleshooting tasks may require that you identify the hardware revision of your monitor’s main board. To check your hardware revision:

1 Enter the Main Setup menu and select Revision.

Page 50

7 Troubleshooting Software Revision Check

Select Product.

You see the hardware revision in the pop-up window, along with the serial number, part number, and the software revision.

The following table shows which part number corresponds to which hardware revision:

Hardware Revision Board Number Description

A.00.05 M2703-66510 Main CPU Board

Software Revision Check

Some troubleshooting tasks may require that you identify the software revision of your monitor. You can find the software revision along with other information, such as the system serial number, in the monitor revision screen.To access the monitor revision screen:

1 Enter the Main Setup menu and select Revision. 2 Select Product.

You see the software revision in the pop-up window, along with the serial number, part number, and the hardware revision.

NOTE The part numbers listed in the monitor revision screen do not necessarily reflect the part numbers

required for ordering parts. Please refer to Chapter 9, “Parts” for the ordering numbers.

NOTE The system serial number can also be found on the lower right corner on the front of the monitor.

Obtaining Replacement Parts

See Chapter 9, “Parts” section for details on replacement parts.

Troubleshooting Guide

Problems with the monitor are separated into the categories indicated in the following sections and tables. Check for obvious problems first. If further troubleshooting instructions are required refer to the Troubleshooting Tables.

Taking the recommended actions discussed in this section will correct the majority of problems you may encounter. However, problems not covered here can be resolved by calling Philips Response Center or your local representative.

Checks for Obvious Problems

When first troubleshooting the instrument, check for obvious problems by answering basic questions such as the following:

1 Is the power switch turned on?

2 Is the AC power cord connected to the instrument and plugged into an AC outlet?

Checks Before Opening the Instrument

You can isolate many problems by observing indicators on the instrument before it is necessary to open the instrument.

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Troubleshooting Guide 7Troubleshooting

Checks with the Instrument Switched On, AC connected

The green power LED lights for about 1.5 seconds after switching on, and then goes out, and remains unlit doing normal operation. The location of the green LED is shown in the following photograph:

Green Power LED

Individual Parameter INOPs

If you see any of the following parameter INOPs:

DECG EQUIP MALF IUP EQUIP MALF

ECG EQUIP MALF NBP EQUIP MALF

Fetrec EQUIP MALF OB EQUIP MALF

FHR1 EQUIP MALF SpO

FHR2 EQUIP MALF SpO

FHR3 EQUIP MALF TOCO EQUIP MALF

try exchanging the relevant component (transducer, sensor, patient module or board) with a known good replacement, following the procedures in Chapter 8, “Disassembly and Reassembly”. Check to see if the INOP disappears, and that you can measure the parameter in question normally. If the INOP persists, swap back the original component and continue troubleshooting as directed in this chapter.

In the case of the INOPs are two or more ultrasound transducers attached to the monitor, INOP was issued, using the blue transducer Finder LED. Touching a numeric on the screen makes the Finder LED light on the transducer providing the measurement. If you cannot identify the suspected transducer directly because the transducer Finder LED does not light due to the defect, identify the other, functioning transducers by activating their Finder LEDs, thus finding the defective one by a process of elimination.

EQUIP MALF

SENSOR MALF

FHR1 EQUIP MALF, FHR2 EQUIP MALF, and FHR3 EQUIP MALF, when there

identify the transducer for which the

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7 Troubleshooting Troubleshooting Guide

Initial Instrument Boot Phase

The following table describe the regular initial boot phase of the monitor. If the boot phase does not proceed as described below go to Boot Phase Failures for Troubleshooting information.

Time (sec.) after Power On

0 Switch the monitor on using the On/Off switch.

2 The green AC Power LED lights for about 1.5 seconds.

3.5 Green AC Power LED is turned off, and remains off.

5 You hear a ‘pop’ from the loudspeaker

6-8 Boot Screen with the Philips Logo appears on the display. Test Sound is issued.

8-10 Boot Screen with the Philips Logo disappears

Fixed screen elements (for example smart keys, alarm fields) appear on the screen.

10-15 First measurement information appears on the screen, touchscreen is functional.

Troubleshooting Tables

The following tables list troubleshooting activities sorted according to symptoms.

How to Use the Troubleshooting Tables

The possible causes of failure and the remedies listed in the troubleshooting tables should be checked and performed in the order they appear in the tables. Always move on to the next symptom until the problem is solved.

Boot Phase Event

Boot Phase Failures

Screen is Blank

Touchscreen Not Functioning

General Monitor INOP Messages

Alarm Tones

Fetal Recorder

LAN / RS232

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Troubleshooting Guide 7Troubleshooting

Boot Phase Failures

Symptoms Possible Ca u ses of

Failure

Green LED does not light up, and no test tone is heard

Green LED does not light up, but you hear a test tone

Green LED stays on continuously

Green LED blinks (indicating cyclic reboots)

No AC mains connection Check that the power cord is not damaged and is

Power supply defective

Power On/Off switch defective

Aborted/interrupted or inconsistent software configuration

Main CPU Board defective

Display Assembly not connected to the Main CPU Board

Touch controller defective

Display Adapter Board defective

LED defective

Main CPU Board defective Try loading new software. If this does not solve the

Hardware failure Connect Support Tool directly to monitor with

Software fault

Hardware failure

Failure Isolation and Remedy

properly connected to the monitor. Check that the power cord is correctly connected to a powered AC mains socket.

Remove power supply and check if output voltage is within the specifications (24V). Measure on multicolored wired connection between red and black wires

Exchange power supply if defective

Replace power supply

Perform a software upgrade using the Support Tool.

Replace Main CPU Board. Add boards in reverse order and try again with each board.

Check if Display Assembly is connected correctly to the Recorder Adapter Board.

Check that the multi-pin connector between the Recorder Adapter Board and the Main CPU Board

Replace the Display Assembly.

Disconnect and reconnect the flat cable of the Display Adapter Board and check again

Try to switch on the monitor. If it operates normally, the LED is defective. Repair is effected by replacing the Display Assembly.

problem, replace Main CPU Board.

crossover cable and start “search for defective devices”

If no device is detected, proceed as described above in the section “Green LED stays on continuously”

If the Support Tool can detect the device and it indicates the Operating Mode is ‘Boot’, download and store the status log. Reload software and re-clone the monitor. If this fixes the problem e-mail the status log to your local response center

If this does not rectify the problem, follow the instructions under “Green LED stays on continuously”.

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7 Troubleshooting Troubleshooting Guide

Symptoms Possible Cau ses of

No Test Sound issued or INOP

Malfunct.

Screen is Blank

The information listed in this table is only valid if the boot phase has completed without error. See Boot Phase Failures table for a description of the boot phase.

Symptoms Possible Cau ses of

Display is blank or brightness is reduced

Speaker

issued

Failure Isolation and Remedy

Failure

Speaker cable disconnected

Speaker defective

Main CPU Board defective

Check speaker connections.

Check for INOPs and follow instructions

Exchange speaker

Exchange Main CPU Board

Failure Isolation and Remedy

Failure

Display Adapter Board cable not connected

Backlight tubes defective Replace Display Assembly.

Backlight inverter defective

Display adapter board defective

LCD flat panel defective

Main CPU Board defective Replace Main CPU Board.

Check cable connection of Display Assembly to the Recorder Adapter Board.

Touchscreen Not Functioning

Symptoms Possible Causes of

Touchscreen not functioning

Touch Position invalid Touch not calibrated Perform touch calibration:

Failure

Touchscreen functionality has been temporarily disabled

Touch screen cable not connected

Touch controller defective

To u c h S e n so r d e f e c t iv e

Main CPU Board defective

Failure Isolation and Remedy

Check if touchscreen functionality has been temporarily disabled (padlock symbol on Main Screen key). If yes, press and hold the Main Screen key to re-enable touchscreen operation.

Check connection from the Display Assembly to the Recorder Adapter Board.

If the problem is not resolved, check that the multipin connector between the Recorder Adapter Board and the main CPU Board.

Replace Display Assembly

Replace Main CPU Board

1. Enter the Main Setup Menu

2. Select Hardware

3. Select Calibrate Touch

See “Touchscreen Calibration” on page 37

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Troubleshooting Guide 7Troubleshooting

General Monitor INOP Messages

INOP Message Possible Causes of

Failure Isolation and Remedy

Failure

CheckInternVoltage Problem with the voltages

(5V) in the monitor

Check Monitor Temp The temperature inside the

monitor is too high

Main Board defective

Check Settings

Internal.Comm.Malf. Main CPU Board defective Replace Main CPU Board. Settings Malfunc. Problem during cloning

INOP occurs during normal operation, indicating a possible monitor software problem

INOP occurs after a software upgrade, indicating a possible incomplete or unsuccessful upgrade

process.

Memory space in which the settings are stored has been corrupted

Main CPU Board defective

Remove all I/O boards and put them back in one at a time to isolate any defective board. If this does not resolve the problem, replace the main board.

Check the environment for possible causes.

Replace Main Board.

Check the monitor and patient settings before you resume monitoring. If the settings are unexpected, there may be a problem with the monitor software.

1 Silence the INOP.

2 Load the User Defaults (see “Loading the User

Defaults” on page 110).

3 If this is unsuccessful, try loading the Factory

Default (see “Loading the Factory Default” on page 109), and reconfigure the monitor in Configuration Mode, and save the new settings in the User Defaults.

If the INOP persists, there is an unresolved software problem. Report the problem to factory support.

Clone the correct settings via the Support Tool.

Reclone configuration file.

Reclone configuration file. This will reload the memory space.

Replace Main CPU Board.

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7 Troubleshooting Troubleshooting Guide

Keyboard/Mouse Not Functioning

Alarm Tones

Symptoms Possible Causes of

Failure

Keyboard/Mouse attached directly to the monitor not functioning

Keyboard/Mouse not connected properly

Keyboard/Mouse defective

PS/2 I/O board is not properly plugged in

PS/2 I/O board defective

Symptoms Possible Causes of

Failure

INOP Message Speaker

Malfunct.

Alarm occurs but no alarm sound is issued

is displayed

Speaker cable disconnected

Speaker defective

Sound amplifier on Main CPU Board defective

Vol u me s et t o 0 Increase volume

Speaker defective

Sound amplifier on Main CPU Board defective

Failure Isolation and Remedy

Check cabling

Replace Keyboard/Mouse

Ensure the PS/2 I/O board is properly plugged in. If necessary, remove the board and plug it in again.

Replace I/O board

Failure Isolation and Remedy

Reconnect speaker cable

Replace speaker

Main CPU Board

Replace speaker

Main CPU Board

Alarm Behavior

If your monitor did not alarm in the way in which the end user expected, please consult the Instructions for Use for possible setup issues or configuration settings which could affect alarm behavior.

Fetal Recorder

Symptom Possible Cause Corrective Action

Paper empty warning is issued in the status line at the bottom of the screen, but paper is not out.

Drawer is open.

Paper jam.

Paper sensor dirty.

Paper sensor defective.

Close the drawer.

Open the drawer, remove paper, tear off scrumpled paper and re-load, or load a new pack of paper. Close the drawer.

Clean paper sensor (see Chapter 6, “Testing and Maintenance”).

Exchange paper sensor (see Chapter 8, “Disassembly and Reassembly” and Chapter 9, “Parts”.

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Troubleshooting Guide 7Troubleshooting

Symptom Pos sible Cause Corrective Action

No paper transport. Poor connection. Check all internal connectors.

Paper jam.

Open the drawer, remove paper, tear off scrumpled section of paper and re-load, or load a new pack of paper. Close the drawer.

Motor cable is disconnected.

Check that the motor cable is properly connected to the Recorder Adapter Board.

Motor is defective.

To test the functioning of the motor, open the drawer and press the recorder

Start/Stop key

to start the recorder. A good motor should rotate for between one and three minutes (depending on the paper speed).

If the motor does not rotate, replace the motor (see “Removing the Stepper Motor” on page 78).

The recorder appears to be running normally, but the paper remains blank

Drawer is open.

Thermal Printhead is disconnected.

Thermal Printhead is defective.

Close the drawer.

Check the connection. Then run the recorder Selftest to verify correct printing (see “Fetal Recorder Selftest Report” on page 40).

Replace the Thermal Printhead. Then calibrate the recorder (see “Setting the Fetal Recorder Offset” on page 39).

The wrong side of the paper

Load the paper correctly, the right way up.

is facing up.

No recorder key is available on the screen, and the INOP

FetRec MALF is

issued.

The recorder has not been calibrated.

EEPROM on the Recorder Adapter Board is defective

Calibrate the recorder (see “Setting the Fetal Recorder Offset” on page 39).

Exchange the Recorder Adapter Board and calibrate the recorder (see “Setting the Fetal Recorder Offset” on page 39).

Recorder Controller on the Main CPU Board is defective.

Exchange the Main CPU Board and calibrate the recorder (see “Setting the Fetal Recorder Offset” on page 39).

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7 Troubleshooting Troubleshooting Guide

Symptom Possible Cause Corrective Action

The INOP Check Paper is issued.

The INOP WRONG PAPER

SCALE

is issued.

Bad or distorted printout within the first 1 cm of the trace.

Poor print quality. Heat setting needs adjusting. Adjust the Thermal Printhead heat setting.

Paper not feeding properly. Paper incorrectly loaded. Load paper correctly.

Tr a ce i s no t p ri n te d correctly with reference to the paper gridlines.

The drawer is open and there is paper on the paper sensor.

Paper jam.

Paper sensor dirty.

Paper sensor defective.

The platen is dirty.

Paper is not approved by Philips.

Inadequate contrast of paper marks.

Paper with the wrong scale has been loaded (for example, European paper has been loaded instead of US paper).

Paper drawer was not fully closed.

Thermal Printhead dirty.

Thermal Printhead failure.

The platen is dirty. Clean the platen (see Chapter 6, “Testing and

Offset needs adjusting. Calibrate the recorder and change the offset (see

Ensure the paper is loaded correctly, and close the drawer.

Open the drawer, remove paper, tear off scrumpled section of paper and re-load, or load a new pack of paper. Close the drawer.

Clean paper sensor (see Chapter 6, “Testing and Maintenance”).

Exchange paper sensor (see Chapter 8, “Disassembly and Reassembly” and Chapter 9, “Parts”.

Clean the platen (see Chapter 6, “Testing and Maintenance”).

Use only paper approved by Philips.

Use only Philips approved paper.

Calibrate the recorder.

Check, and if necessary, replace the paper pack with one with the correct scale. Check, and if necessary, change the paper scale setting to the correct setting for the paper used.

Always ensure the paper drawer is fully closed before starting recording.

Then run the recorder Selftest to verify correct printing (see “Fetal Recorder Selftest Report” on page 40).

Clean the Thermal Printhead (see Chapter 6, “Testing and Maintenance”). Then run the recorder Selftest to verify correct printing (see “Fetal Recorder Selftest Report” on page 40).

Exchange the Thermal Printhead (see “Removing the Thermal Line Printhead (TLPH)” on page 72 and “Replacing the TLPH” on page 73). Then run the recorder Selftest to verify correct printing (see “Fetal Recorder Selftest Report” on page 40).

Maintenance”).

“Setting the Fetal Recorder Offset” on page 39).

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Troubleshooting Guide 7Troubleshooting

LAN / RS232

Symptoms Cause of Failure Failure Isolation and Remedy

External device (such as a surveillance system like OB TraceVue) not receiving data

The LAN/RS232 port is not configured for data export

The cable between the external device and the monitor is not connected correctly or defective

The external device does not support the version of the data export protocol used in the monitor

A terminal concentrator is used in between the device and the monitor and a protocol with dynamic speed negotiation is used

The LAN/RS232 board is in a wrong slot (slot has been changed after software configuration or an additional board has been plugged in)

The LAN/RS232 board is defective

Check configuration of the LAN/RS232 ports in configuration mode

Check cable and replace if necessary

Check if the device supports the version of the data export protocol. Upgrade device or monitor if necessary (if matching versions exist).

Some terminal concentrators do not support changing the transmission speed (baud rate) dynamically. Check if the connection works without the concentrator

Verify correct placement of the I/O boards

Check board and replace if necessary

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7 Troubleshooting Troubleshooting Guide

Transducers

Symptoms Possible Cause Failure Isolation and Remedy

Transducer appears not to work, and the transducer Finder LED does not light when you touch the parameter field on the screen.

INOP

OB EQUIP MALF

is displayed.

Transducer appears not to work, but the transducer Finder LED lights when you touch the parameter field on the screen.

Defective transducer cable.

Defective connector block.

Transducer or connector block is defective.

Bus Master Board is defective.

No power to Bus Master Board.

Visually inspect the transducer cable and the cable connector for damage. If there are obvious signs of damage, replace the cable.

Visually inspect the connector block and the sensor sockets for damage. If there are obvious signs of damage, replace the connector block.

Try plugging the transducer into a different sensor socket.

• If the Finder LED works, then the original socket is defective. Replace the connector block.

• If the Finder LED still does not light in any of the other sockets, try using a known good transducer. If the Finder LED lights, the original transducer is defective: replace it.

Try using a known good transducer. If the Finder LED does not light in any of the sockets using a known good transducer, then the Bus Master Board is defective. Replace the Bus Master Board.

If both the SpO2 board and the Bus Master Board are not working, exchange the power supply.

INOP

OB EQUIP MALF

is displayed.

All transducers (US, Toco, IUP and ECG) do not work.

INOP

OB EQUIP MALF

is displayed.

Bus Master Board is defective.

Replace Bus Master Board.

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Troubleshooting Guide 7Troubleshooting

Symptoms Pos sible Cause Failure Isolation and Remedy

Status Log

Many events that occur during start-up or regular monitoring are logged in the Status Log. The Status Log can be cleared. Not all entries in the Status Log are errors. You can print the Status Log only via the Support Tool.

Transducer is connected, INOP

OB EQUIP MALF

is displayed.

Transducer belt button is broken or damaged.

Main CPU board is defective.

Transducer defective.

Interrupted transducer upgrade, or software based malfunction of the transducer, including communication problems between the Bus Master Board and the transducer.

Mechanical damage. Replace the belt button.

Replace Main CPU Board.

Replace transducer.

Perform soft ware upgr ade of the transducer with the Support Tool.

Handle transducers with care.

Never use a transducer with a broken or damaged knob.

Monitor Id. Code No. Date

Time H 18202 20100 1 4 Apr 05 16:37 C 1721 21050 1 4 Apr 05 15:37

The Status Log window shows logged events which caused a reboot of the monitor.

To enter the Status Log Window, select Main Setup -> Revision. The following list opens up:

• Status Log

• Product

• Appl. SW

• Config

•Boot

• Language

•OB

• FetRec Select Status Log.

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7 Troubleshooting Troubleshooting Guide

The first column in the log identifies the event class (“C”: caused a cold start, “H”: caused a hot start, “N”: no restart, for information only). Column 3 and 4 identify the event source and event code. Column 4 counts the number of occurrences of the event. The last column shows the time and date of the last occurrence of the event.

The following pop-up keys overlay the SmartKeys:

Clear StatLog

This key clears the currently displayed Status Log

M2703A

This key switches to the Monitor Revision Window

If an event occurs repeatedly, contact your Philips Service Representative.

NOTE It is possible, using the support tool, to download the status log and send it to your Philips Service

Representative as a file (for example via e-mail).

M2703A

Troubleshooting with the Support Tool

Using the support tool you can:

• access the full status log which can be saved as a file

•reload software

• identify defective devices

• reset touch screen calibration

For details on how to perform these tasks see the Support Tool User Manual.

Troubleshooting the Individual Measurements or Applications

For problems isolated to an individual parameter or application, please consult the Instructions for Use and configuration information.

If the Instructions for Use did not resolve an individual parameter problem, then another transducer or patient module should be tried.

If you are getting questionable readings for individual measurements you may want to do the performance assurance tests in Chapter 6, “Testing and Maintenance”.

The performance of the individual applications are affected by the configuration of the monitor. When contacting Philips support you may be asked about the configuration of the monitor to aid in troubleshooting.

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8Disassembly and Reassembly

WARNING • Before attempting to open or disassemble the monitor, disconnect it from the AC mains supply.

• Energized circuits are accessible with the covers open. Do not work on the monitor with the covers open and AC power connected. Only qualified service personnel should open or disassemble the monitor.

• Performance verification: do not place the system into operation after repair or maintenance has been performed, until all performance tests and safety tests listed in Chapter 6, “Testing and Maintenance” have been performed. Failure to perform all tests could result in erroneous parameter readings, or patient/ operator injury.

CAUTION Observe ESD (electrostatic discharge) precautions when working within the unit.

Introduction

Remember to store all screws and parts in a safe place for later refitting.

How to Use this Chapter

The disassembly sections detail the step-by-step procedures you use to access replaceable parts of the monitor and the transducers.

The monitor consists of two major assemblies:

•The top cover assembly

• The bottom housing assembly

The top cover assembly consists of the top cover housing, the display assembly, the recorder assembly, and the recorder adapter board.

The bottom housing assembly consists of the bottom housing, the power supply assembly, the main CPU board, the bus master board, and depending on the options ordered, the noninvasive blood pressure assembly, the SpO

All part numbers of spare parts are listed in Chapter 9.

assembly, the input device interfaces, and the RS232/LAN interface.

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8 Disassembly and Reassembly Serial Numbers

Tools Required

CAUTION When replacing the front cover, do not over-torque the screws. Excessive torque may damage the plastic

screw mountings.

You need the following tools:

• Flat-head screwdriver, head thickness 0.5 mm to fit transducer screw

• Torx-head screwdriver, size T-10, minimum shaft length 80mm

• Small flat-head screwdriver, 2.0-3.0 mm

•Long-nosed pliers

Serial Numbers

The serial number of the monitor appears on the device nameplate at the rear of the bottom housing. It is also stored electronically in the power supply.

• If you change the bottom housing, remove the nameplate from the old housing and fit it to the new housing.

• If you exchange the power supply of the monitor, you may have to re-enter the monitor serial number afterwards. Check the serial number of the monitor in the Support Tool device view to see whether this is necessary: if the sixth digit of a monitor serial number is an “X”, you must re-enter the serial number, which you will find on the nameplate. Refer to the Support Tool Instructions for Use for details of how to change or re-enter a serial number.

Page 65

Removing the Top Cover Assembly 8 Disassembly and Reassembly

Removing the Top Cover Assembly

1 First fold the display completely flat.

1 Carefully place the monitor upside down. To avoid scratches, place the unit on some cloth or other soft

surface.

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8 Disassembly and Reassembly Removing the Top Cover Assembly

Remove the four screws securing the top cover assembly to the bottom housing, using a T-10 Torx driver.

Screws

3 To gain access to the screw in the rear right hand corner, release the cable guide aside as illustrated.

4 Holding both top cover and bottom housing assemblies together, place the monitor upright again.

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Removing the Display Assembly 8 Disassembly and Reassembly

Separate the top cover from the bottom housing from the front of the monitor as illustrated.

6 The top cover assembly is now separated from the bottom housing assembly.

Top cover assembly

Removing the Display Assembly

1 Remove the top cover assembly (see page 57).

2 Place the top cover assembly top down on a cloth or other soft surface.

Bottom housing assembly

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8 Disassembly and Reassembly Removing the Display Assembly

Recorder cable

Recorder adapter board

First release the cable lock by moving it in the direction of the arrows, then disconnect the white

recorder ribbon cable from the recorder adapter board.

Cable lock

4 Next, disconnect the silver display ribbon cable from the recorder adapter board after releasing the cable

lock.

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Removing the Display Assembly 8 Disassembly and Reassembly

Turn over the top cover assembly.

6 Remove the two plastic hinge pins on either side of the display housing. Release them by turning the

slotted head anti-clockwise with a small flat-bladed screwdriver.

7 Squeeze the arms of the ratchet clip to remove it from the slots on the rear of the display housing and the

top cover as illustrated.

8 Gently pull the display ribbon cable through the cable guide, and remove the display assembly.

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8 Disassembly and Reassembly Replacing the Display Assembly

Cable guide

Replacing the Display Assembly

Replacing the display assembly is the reverse of the removal procedure.

1 With the top cover assembly facing upwards, feed the display ribbon cable through the cable guide in

the top cover assembly.

2 Carefully turn over the top cover assembly together with the display assembly.

3 Gently pull the display ribbon cable fully through the cable guide.

Recorder ribbon cable

Display ribbon cable

4 Reconnect the display ribbon cable to the recorder adapter board, ensuring that the cable lock is secure

after fitting.

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Replacing the Display Assembly 8 Disassembly and Reassembly

Reconnect the white recorder ribbon cable to the recorder adapter board, ensuring the cable lock is

secure after fitting.

Cable lock

6 Refit the plastic hinge pins. Do not apply excessive force when refitting the hinge pins. Turn the head of

the hinge pin gently with a small screwdriver. You will feel when the pin is seated correctly, the head should be flush with the surface, and the slot in the head of the pin should be pointing in the same plane as the side of the display assembly housing.

Correct final position

Page 72

8 Disassembly and Reassembly Recorder Disassembly

Refit the ratchet clip into the slots on the rear of the display housing and the top cover, as a reversal of the removal procedure.

Recorder Disassembly

The recorder consists of the following major sub-assemblies:

• Drawer Assembly

•Recorder Chassis

•Thermal Line Printhead (TLPH) Holder

• Recorder Adapter Board

• Stepper Motor

Removing the Drawer Assembly

1 Press the paper table release to unlock the paper drawer and then pull the table forward to open it fully.

2 Squeeze the two plastic lugs on the underside of the drawer to release the drawer, and then pull to

remove the drawer. (Here shown with the top cover removed.)

Page 73

Recorder Disassembly 8 Disassembly and Reassembly

Detail showing plastic hooks open

Page 74

8 Disassembly and Reassembly Recorder Disassembly

Replacing the Drawer Assembly

Before replacing the drawer assembly, refer to the previous photographs, and study the detail showing the position of the plastic hooks when the drawer is fixed in position.

Detail showing plastic hooks latched onto metal guide. This is how the hooks should be when the drawer is fixed in position.

1 Slide the drawer into the drawer recess on the top cover, and check that it is located correctly on the

runners.

2 Latch the two plastic hooks onto the metal guides to secure the drawer in place. You will find it easier to

use a long-nosed pair of pliers to move the hook into position, as shown in the following photographs.

Page 75

Recorder Disassembly 8 Disassembly and Reassembly

Final position (hook latched onto metal guide)

Page 76

8 Disassembly and Reassembly Recorder Disassembly

Removing the Recorder Chassis

1 Remove the top cover assembly (see page 57).

2 Slide open the paper drawer, to gain access to the two countersunk screws (in the following

photographs, we have removed the drawer assembly).

3 Remove the two countersunk screws.

4 Turn over the top cover assembly and place it top down on a cloth or other soft surface.

RFI bracket

Recorder chassis

Recorder cable

Stepper motor

Paper sensor

Display cable

Recorder adapter board

under recorder cable

Page 77

Recorder Disassembly 8 Disassembly and Reassembly

First release the cable lock by moving it in the direction of the arrows, then disconnect the white recorder ribbon cable from the recorder adapter board.

Cable lock

6 Next, disconnect the silver display ribbon cable from the recorder adapter board after releasing the cable

lock.

7 Disconnect the stepper motor the paper sensor cable connectors from the recorder adapter board.

Paper sensor cable connector

connector

Stepper motor cable connector

Page 78

8 Disassembly and Reassembly Recorder Disassembly

Remove the two screws (one on each side) fastening the RFI bracket to the recorder chassis.

9 Partially unscrew the screw nearest the recorder adapter board holding the stepper motor to the recorder

chassis, until the thread no longer protrudes. This allows the necessary clearance for removing the RFI bracket.

10Remove the four screws holding the recorder chassis.

Page 79

Recorder Disassembly 8 Disassembly and Reassembly

Free the RFI bracket on the stepper motor side by applying a little sideways pressure to the recorder

chassis, while at the same time pulling the RFI bracket forwards.

12Remove the RFI bracket.

Page 80

8 Disassembly and Reassembly Recorder Disassembly

Lift out the recorder chassis.

Removing the Thermal Line Printhead (TLPH)

1 Remove the recorder chassis as described in the section “Replacing the Recorder Chassis” on page 74”.

TLPH in holder

2 Turn the recorder chassis over.

Screws holding TLPH to TLPH holder

Page 81

Recorder Disassembly 8 Disassembly and Reassembly

Remove the two screws holding the TLPH to the TLPH holder.

4 Turn the chassis assembly over again, and carefully remove the TLPH from the holder as shown.

Replacing the TLPH

The procedure for replacing the TLPH is a reversal of the removal procedure.

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8 Disassembly and Reassembly Recorder Disassembly

Replacing the Recorder Chassis

The procedure for replacing the recorder chassis is a reversal of the removal procedure (see “Replacing the Recorder Chassis” on page 74 for the sequence).

1 Ensure that the TLPH holder has been fitted to the recorder chassis, as described in the previous

section.

2 Place the recorder chassis into position, and drive the four fixing screws in lightly. Do not tighten yet!

3 Turn over the top cover housing, then secure the two countersunk screws. This centers the recorder

chassis correctly.

4 Turn over the top cover again, and replace the RFI bracket, reversing the removal procedure. Secure the

RFI bracket to the recorder chassis with the two screws.

5 Tighten the stepper motor screw that you loosened to allow removal of the RFI bracket.

Page 83

Recorder Disassembly 8 Disassembly and Reassembly

Now tighten the four screws to secure the recorder chassis.

7 Ensure that you reconnect the paper sensor cable and the stepper motor cable to the recorder adapter

board.

Removing the Paper Sensor Assembly

1 Remove the top cover assembly (see “Removing the Top Cover Assembly” on page 57).

2 Place the top cover assembly top down on a cloth or other soft surface.

3 Disconnect the paper sense cable connector from the recorder adapter board.

Paper sensor cable connector

4 Turn over the top cover and remove the screw holding the paper sensor to the RFI bracket.

Replacing the Paper Sensor Assembly

The procedure for replacing the paper sensor is a reversal of the removal procedure. Ensure that the paper sensor cable is properly connected to the recorder adapter board.

Removing the Recorder Adapter Board

1 Remove the top cover assembly (see “Removing the Top Cover Assembly” on page 57).

2 Place the top cover assembly top down on a cloth or other soft surface.

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8 Disassembly and Reassembly Recorder Disassembly

Recorder cable

Recorder adapter board

First release the cable lock by moving it in the direction of the arrows, then disconnect the white

recorder ribbon cable from the recorder adapter board.

Cable lock

4 Next, disconnect the silver display ribbon cable from the recorder adapter board after releasing the cable

lock.

Page 85

Recorder Disassembly 8 Disassembly and Reassembly

Disconnect the stepper motor the record-sense cable connectors from the recorder adapter board.

Paper sensor cable connector

6 With all cables disconnected, remove the recorder adapter board.

Replacing the Recorder Adapter Board

The procedure to replace the recorder adapter board is a reversal of the removal procedure. Ensure that all cables are firmly reconnected.

connector

Stepper motor cable connector

Page 86

8 Disassembly and Reassembly Recorder Disassembly

Removing the Stepper Motor

1 Remove the top cover assembly (see “Removing the Top Cover Assembly” on page 57).

2 Place the top cover assembly top down on a cloth or other soft surface.

Stepper motor

3 Disconnect the stepper motor cable connector from the recorder adapter board.

Stepper motor cable connector

4 Remove the two screws holding the stepper motor to the recorder chassis. Note that the upper screw is

secured with a small nut.

Page 87

Replacing the Stepper Motor 8 Disassembly and Reassembly

5 Remove the stepper motor.

Replacing the Stepper Motor

1 Refit the stepper motor to the recorder chassis, but do NOT tighten the screws yet! The upper slot on

the stepper motor allows fine adjustment when meshing the gears together.

2 Close the drawer assembly.

3 Gently mesh the stepper motor gear with that of the paper roller.

CAUTION Do NOT press the gears together or exert any pressure on the stepper motor spindle.

Page 88

8 Disassembly and Reassembly Replacing the Top Cover Assembly

When in place, tighten the screws, remembering that the upper screw is secured with a small nut.

Replacing the Top Cover Assembly

1 Ensure all items are replaced in the top cover assembly. Check that all the cables are reconnected.

2 Carefully align the front edge of the top cover assembly with the front edge of the bottom housing

assembly.

3 With the front edge of the top cover still located in the front edge of the bottom housing, gently lower

the top cover, making sure the multi-pin connector on the recorder adapter board aligns with the socket on the main CPU board.

4 Place the top cover back to its normal position. Apply a little pressure to seat the multi-pin connector.

Page 89

Removing the Power Supply Assembly 8 Disassembly and Reassembly

5 Holding both assemblies together, carefully place the unit upside down on a soft surface to prevent

scratching or other damage.

6 Refit the four screws securing the top cover assembly to the bottom housing, using a T-10 Torx driver, as

a reversal of the procedure in “Removing the Top Cover Assembly” on page 57. Turn the monitor the right way up.

CAUTION When replacing the top cover, do not over-torque the screws. Excessive torque may damage the screw

mountings.

Removing the Power Supply Assembly

1 Remove the top cover assembly (see page 57).

2 Disconnect the power supply cable connector from the main CPU board. While removing the

connector, support the end of the main CPU board to prevent excessive flexing.

Remove power

supply cable

3 Remove the three screws securing the power supply

Page 90

8 Disassembly and Reassembly Replacing the Power Supply Assembly

Lift the cable end of the power supply assembly with one hand, while guiding the power socket/on/off

switch free of the aperture in the bottom housing, then lift out the power supply

Replacing the Power Supply Assembly

The procedure to replace the power supply assembly is a reversal of the removal procedure. Remember to reconnect the power supply cable connector.

Removing the Noninvasive Blood Pressure Assembly

1 Remove the top cover assembly (see page 57).

The NiBP assembly is identified in the next picture.

Noninvasive Blood Pressure Assembly

Noninvasive Blood Pressure cable

Noninvasive Blood Pressure tubing

Page 91

Removing the Noninvasive Blood Pressure Assembly 8 Disassembly and Reassembly

Disconnect the tubing from the noninvasive blood pressure connector, and the ribbon cable from the main CPU board.

3 Disconnect the grounding cable’s spade connector.

4 Remove the two screws holding the noninvasive blood pressure assembly to the bottom housing, then

remove the noninvasive blood pressure assembly.

Page 92

8 Disassembly and Reassembly Replacing the Noninvasive Blood Pressure Assembly

To separate the noninvasive blood pressure assembly from the noninvasive blood pressure assembly holder, remove the three screws.

Replacing the Noninvasive Blood Pressure Assembly

The procedure to replace the noninvasive blood pressure assembly is a reversal of the removal procedure.

Page 93

Removing the SpO2 Assembly 8 Disassembly and Reassembly

Removing the SpO2 Assembly

1 Remove the top cover assembly (see page 57).

The SpO

assembly is identified in the next picture.

SpO

assembly

(Power supply shown removed)

2 Remove the two screws holding the SpO

assembly.

Screw locations

3 Remove the flat brown cable from the rear of the SpO

sensor socket.

Page 94

8 Disassembly and Reassembly Replacing the SpO2 Assembly

Lift the side of the SpO2 assembly nearest the SpO2 socket, carefully disconnecting the multi-pin connector shown.

Multi-pin connector

5 Remove the SpO

assembly.

Replacing the SpO2 Assembly

The procedure to replace the SpO2 assembly is a reversal of the removal procedure.

Page 95

Removing the Interface Boards 8 Disassembly and Reassembly

Removing the Interface Boards

The interface boards can be accessed from the underside of the monitor’s housing.

1 Turn the monitor upside down on a non-scratch surface.

2 Release the board by pressing the clip that keeps the board in place, as shown. Use a small flat-headed

screwdriver to gently prise the board out if it is too tight to pull out with your fingers.

3 Pull the board out.

Page 96

8 Disassembly and Reassembly Removing the Main CPU Board

Removing the Main CPU Board

To remove the main CPU board, proceed as follows:

1 Remove the top cover assembly (see page 57).

2 Remove the screws holding the metal shield.

Screws

3 Remove the shield.

4 Disconnect the loudspeaker cable (1), the power supply cable (2), the bus master board cable (3), and

the noninvasive blood pressure cable (4) from the main CPU board.

12 34

Page 97

Replacing the Main CPU Board 8 Disassembly and Reassembly

Remove the main CPU board by lifting it straight up.

Replacing the Main CPU Board

The procedure to replace the main CPU board is a reversal of the removal procedure. Ensure all the cables are properly reconnected.

Exchanging the Loudspeaker

1 Remove the top cover assembly (see page 57).

2 Disconnect the loudspeaker cable connector from the main CPU board.

3 Remove the three screws holding the loudspeaker, and remove the loudspeaker.

4 Refit the loudspeaker, making sure to refit the o-ring gasket. If a new gasket is required, it is available as

part of the bottom housing small parts kit. (See “Small Parts Kit - Bottom (M2703-64203)” on page 102.)

Loudspeaker cable connector

Loudspeaker

Page 98

8 Disassembly and Reassembly Exchanging the Transducer Cable

Exchanging the Transducer Cable

See the “Transducer Cable Assembly (M2735-64201)” on page 101 for items that come with the cable.

Important when fitting the screw covers! Do NOT remove the screw covers from the frame to which they are attached. Leave them in place, as it is the only way to align the screw covers correctly. They detach from the frame when you press them into position.

To exchange a transducer cable:

1 Pierce a screw cover with a small, flat-bladed screwdriver. Important! Do NOT try to prise out a screw

cover from the side, without piercing it, as this will damage the transducer top cover.

1 Gently rock the screwdriver back and forth until the screw cover comes out. Repeat to remove all three

screw covers

2 Remove the three screws, and remove the transducer top cover.

Page 99

Exchanging the Transducer Cable 8 Disassembly and Reassembly

Disconnect the small cable connector, remove the old cable, and fit the new cable (as a reversal of the removal procedure).

3 Remove the sealing gasket from the top cover, and replace it with the new one supplied with the cable.

While handling a Toco/Toco

transducer, take care not to displace the strain gauge. Fit a new gasket to

the top cover, ensuring the gasket is properly seated, replace the top cover and secure it with the three screws.

4 Leaving the screw covers attached to the frame, carefully align the screw covers with the screw recesses in

the top cover. Next, partially press in two of the covers at the same time, then press in the third one (they detach from the frame as you push them in). Then make sure all three covers are pushed completely into the recesses.

Page 100

8 Disassembly and Reassembly Exchanging the Transducer Belt Button

Exchanging the Transducer Belt Button

CAUTION NEVER immerse a transducer in liquid if the belt button has been removed, or is loose, broken or

damaged.

M2703-64204 Replacement Belt Button Kit Contents:

1 Remove the belt button using the tool provided with the belt button kit.

2 Dispose of the old belt button. Take a new belt button and fit it to the transducer. Initially, screw the

button in by hand about four turns, then complete the job with the supplied tool. Stop applying force when the head of the tool makes contact with the body of the tool at the point indicated by the arrows.

Philips Avalon FM20, Avalon FM30 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1Introduction

Who Should Read This Guide

What to Do Next

Repair Strategy

Manufacturer’s Information

Passwords

Warnings and Cautions

Introduction

Site Planning

2Site Preparation

Roles and Responsibilities

Site Preparation Responsibilities

Procedures for Local Staff

Procedures for Philips Personnel

Site Requirements

Space Requirements

Environmental Requirements

Safety Requirements (Customer or Philips)

Electrical Requirements (Customer or Philips)

Connecting Non-Medical Devices

Cabling Options and Requirements for Connection to OB TraceVue

Mounting Options

Input Devices

3Installation Instructions

Initial Inspection

Mechanical Inspection

Electrical Inspection

Claims for Damage

Repackaging for Shipment or Storage

Mounting Instructions

Line Voltage Selection

Connecting the Monitor to AC Mains

Connecting the Monitor to Non-Medical Devices

Checking and Setting Line Frequency

Checking/Setting Paper Scale

Checking/Setting Paper Speed

PS/2 Keyboard/Mouse

4Theory of Operation

Monitor Hardware Overview

Power Supply

Connector Block

Bus Master Board

Main CPU Board

Fetal Recorder (Thermal Printer Unit)

Recorder Adapter Board

Thermal Line Printhead (TLPH)

Paper Sensor

Stepper Motor

LCD Display and Touchscreen

Noninvasive Blood Pressure Assembly

SpO2 Assembly

Input/Output Interface Boards

Transducer Hardware Overview

Transducer Types

Functional Description of the Transducer CPU

CPU (Micro Controller)

Analog-to-Digital Converter

Communication Transceiver (CAN Bus Driver)

EEPROM

Toco Transducer Frontend

Ultrasound Transducer Frontend

Toco+ Transducer Frontends

Toco Frontend

IUP Frontend

ECG Frontend

5Interfaces

LAN / RS232 Interface

Dual PS/2 Interface

6Testing and Maintenance

Recommended Frequency

When to Perform Test Blocks

Test Reporting

How to Carry Out the Test Blocks

Preventive Maintenance Procedures

Other Regular Tests

Visual Check