Nellcor NPB-190 User manual

SERVICE MANUAL

NPB-190 Pulse Oximeter

Caution: Federal law (U.S.) restricts this device to sale by or on the order of a physician.

To contact Mallinckrodt’s representative: In the United States, call 1.800.635.5267 or 314.654.2000; outside of the United

States, call your local Mallinckrodt representative.

0123

Mallinckrodt, Inc. 675 McDonnell Boulevard P.O. Box 5840 St. Louis, MO 63134 Tel 314.654.2000 Toll Free 1.800.635.5267

Nellcor Puritan Bennett 4280 Hacienda Drive Pleasanton, CA 94588 USA

Mallinckrodt Europe BV Hambakenwetering 1 5231 DD’s-Hertogenbosch The Netherlands Tel +31.73.6485200

Nellcor Puritan Bennett is a wholly owned subsidiary of Mallinckrodt Inc. Nellcor and Nellcor Puritan Bennett are trademarks of Mallinckrodt Inc.

To obtain information about a warranty, if any, for this product, contact Mallinckrodt Technical Services or your local Mallinckrodt representative.

Purchase of this instrument confers no express or implied license under any Mallinckrodt patent to use the instrument with any sensor that is not manufactured or licensed by Mallinckrodt.

Durasensor, and Oxisensor II, are trademarks of Mallinckrodt Inc.

Covered by one or more of the following U.S. Patents and foreign equivalents: 4,621,643; 4,653,498; 4,700,708; 4,770,179; 4,869,254; Re.35.122; 4,928,692; 4,934,372; 5,078,136; and 5,368.224.

TABLE OF CONTENTS

List of Figures List of Tables

Table Of Contents ....................................................................................... iii

List Of Figures......................................................................................... v

List Of Tables .......................................................................................... vi

Section 1: Introduction............................................................................... 1-1

1.1 Manual Overview.......................................................................... 1-1

1.2 NPB-190 Pulse Oximeter Description.......................................... 1-1

1.3 Power-On Self Test...................................................................... 1-2

1.4 Related Documents...................................................................... 1-3

Section 2: Routine Maintenance................................................................ 2-1

2.1 Cleaning ....................................................................................... 2-1

2.2 Periodic Safety and Functional Checks ....................................... 2-1

2.3 Battery.......................................................................................... 2-1

Section 3: Performance Verification ......................................................... 3-1

3.1 Introduction .................................................................................. 3-1

3.2 Equipment Needed ...................................................................... 3-1

3.3 Performance Tests....................................................................... 3-1

3.4 Safety Tests ................................................................................. 3-9

Section 4: Audible Alarm Settings & Service Menu................................. 4-1

4.1 Introduction .................................................................................. 4-1

4.2 Audible Alarm Settings ................................................................. 4-1

4.3 Service Menu ............................................................................... 4-2

Section 5: Troubleshooting ....................................................................... 5-1

5.1 Introduction .................................................................................. 5-1

5.2 How To Use This Section............................................................. 5-1

5.3 Who Should Perform Repairs ...................................................... 5-1

5.4 Replacement Level Supported ..................................................... 5-1

5.5 Obtaining Replacement Parts ...................................................... 5-1

5.6 Troubleshooting Guide ................................................................. 5-2

5.7 Error Codes.................................................................................. 5-7

Section 6: Disassembly Guide................................................................... 6-1

6.1 Introduction .................................................................................. 6-1

6.2 Prior to Disassembly .................................................................... 6-1

6.3 Fuse Replacement ....................................................................... 6-2

6.4 Monitor Disassembly .................................................................... 6-3

6.5 Monitor Reassembly .................................................................... 6-4

6.6 Battery Replacement.................................................................... 6-5

6.7 Power Entry Module (PEM) Removal/Installation ........................ 6-6

6.8 Power Supply Removal/Installation.............................................. 6-7

6.9 Display PCB Removal/Installation................................................ 6-9

6.10 UIF PCB Removal/Installation...................................................... 6-10

6.11 Alarm Speaker Removal/Installation............................................ 6-11

Section 7: Spare Parts ................................................................................ 7-1

7.1 Introduction .................................................................................. 7-1

Section 8: Packing For Shipment .............................................................. 8-1

8.1 General Instructions ..................................................................... 8-1

iii

Table of Contents

8.2 Repacking in Original Carton ....................................................... 8-1

8.3 Repacking in a Different Carton................................................... 8-3

Section 9: Specifications............................................................................ 9-1

9.1 General ........................................................................................ 9-1

9.2 Electrical....................................................................................... 9-1

9.3 Physical Characteristics ............................................................... 9-2

9.4 Environmental .............................................................................. 9-2

9.5 Alarms .......................................................................................... 9-2

9.6 Factory Default Settings ............................................................... 9-2

9.7 Performance ................................................................................ 9-3

Appendix (Serial Port Interface Protocol)................................................. A-1

A1 Introduction .................................................................................. A-1

A2 Enabling the Serial Port................................................................ A-1

A3 Connecting to the Serial Port ....................................................... A-1

A4 Real-Time Printout ....................................................................... A-2

A5 Nurse Call .................................................................................... A-5

Technical Supplement................................................................................ S-1

S1 Introduction .................................................................................. S-1

S2 Oximetry Overview....................................................................... S-1

S3 Circuit Analysis............................................................................. S-3

S4 Functional Overview..................................................................... S-3

S5 AC Input ....................................................................................... S-3

S6 Power Supply PCB Theory of Operation...................................... S-4

S7 Battery.......................................................................................... S-5

S8 User Interface PCB (UIF) ............................................................. S-5

S9 Front Panel Display PCB and Controls ........................................ S-8

S10 Schematic Diagrams .................................................................... S-9

LIST OF FIGURES

Table of Contents

Figure 1-1: NPB-190 Front Panel.................................................................. 1-2

Figure 1-2: NPB-190 Rear Panel .................................................................. 1-2

Figure 3-1: NPB-190 Controls....................................................................... 3-2

Figure 3-2: Self-Test Display......................................................................... 3-3

Figure 3-3: Adjusting High %SpO2 Alarm Limit ............................................ 3-3

Figure 3-4: Adjusting Low %SpO2 Alarm Limit ............................................. 3-4

Figure 3-5: Adjusting High Heart Rate Alarm Limit ....................................... 3-4

Figure 3-6: Adjusting Low Heart Rate Alarm Limit ........................................ 3-4

Figure 3-7: Alarm Silence Duration ............................................................... 3-6

Figure 3-8: Alarm Volume Display ................................................................ 3-7

Figure 4-1: NPB-190 Controls....................................................................... 4-1

Figure 6-1: Fuse Removal............................................................................. 6-2

Figure 6-2: NPB-190 Corner Screws ............................................................ 6-3

Figure 6-3: Separating Case Halves ............................................................. 6-4

Figure 6-4: Battery Removal ......................................................................... 6-5

Figure 6-5: Power Entry Module.................................................................... 6-6

Figure 6-6: Power Supply Leads Connections .............................................. 6-7

Figure 6-7: Power Supply.............................................................................. 6-8

Figure 6-8: Display PCB................................................................................ 6-9

Figure 6-9: UIF PCB...................................................................................... 6-10

Figure 6-10: Alarm Speaker .......................................................................... 6-12

Figure 7-1: NPB-190 Exploded View............................................................. 7-2

Figure 8-1: Repacking the NPB-190 ............................................................. 8-2

Figure A-1: Serial Port Pin Layout................................................................. A-2

Figure A-2: Real-Time Printout ..................................................................... A-2

Figure S-1: Oxyhemoglobin Dissociation Curve ........................................... S-2

Figure S-2: NPB-190 Functional Block Diagram ........................................... S-3

Figure S-3 Front End Red/IR Schematic Diagram ....................................... S-11

Figure S-4 Front End LED Drive Schematic Diagram.................................. S-13

Figure S-5 Front End Output Schematic Diagram ....................................... S-15

Figure S-6 Front End Power Supply Schematic Diagram ............................ S-17

Figure S-7 Isolation Barrier EIA-232 Port Schematic Diagram .................... S-19

Figure S-8 CPU Core Schematic Diagram .................................................. S-21

Figure S-9 PIC and Speaker Schematic Diagram ....................................... S-23

Figure S-10 Indicator Drive Schematic Diagram.......................................... S-25

Figure S-11 Core Power Supply Schematic Diagram .................................. S-27

Figure S-12 Parts Locator Diagram for UIF PCB ......................................... S-29

Figure S-13 Display PCB Schematic Diagram............................................. S-31

Figure S-14 Parts Locator Diagram for Display PCB ................................... S-33

Figure S-15 Power Supply Schematic Diagram ........................................... S-35

Figure S-16 Parts Locator Diagram for Power Supply PCB......................... S-37

Table of Contents

LIST OF TABLES

Table 3-1: Dynamic Operating Range.......................................................... 3-8

Table 3-2: Earth Leakage Current Limits ..................................................... 3-10

Table 3-3: Enclosure Leakage Current Limits.............................................. 3-11

Table 3-4: Patient Leakage Current Limits .................................................. 3-12

Table 3-5: Patient Leakage Current Test Configurations - Mains

Voltage on the Applied Part ........................................................ 3-12

Table 4-1: Factory Default Settings.............................................................. 4-3

Table 5-1: Problem Categories .................................................................... 5-2

Table 5-2: Power Problems.......................................................................... 5-3

Table 5-3: Button Problems ......................................................................... 5-4

Table 5-4: Display/Alarms Problems............................................................ 5-4

Table 5-5: Operational Performance Problems ........................................... 5-5

Table 5-6: Serial Port Problems ................................................................... 5-6

Table 5-7: Error Codes................................................................................. 5-7

Table A-1: Serial Port Pin Outs .................................................................... A-1

Table A-2: Status Codes .............................................................................. A-4

SECTION 1: INTRODUCTION

1.1 Manual Overview

1.2 NPB-190 Pulse Oximeter Description

1.3 Power-On Self Test

1.4 Related Documents

1.1 MANUAL OVERVIEW

This manual contains information for servicing the Nellcor model NPB-190 Pulse Oximeter. Only qualified service personnel should service this product. Before servicing the NPB-190, read the operator’s manual carefully for a thorough understanding of operation.

Warning: Explosion hazard. Do not use the NPB-190 pulse oximeter in the presence of flammable anesthetics.

1.2 NPB-190 PULSE OXIMETER DESCRIPTION

The Nellcor NPB-190 portable pulse oximeter is intended for continuous, noninvasive measurement of functional oxygen saturation of arterial hemoglobin (SpO

2), and pulse rate (measured by SpO2 sensor).

The monitor is intended for use on adult, pediatric, and neonatal patients in all hospital-type facilities and in the home environment. It may be used during intrahospital transport when powered by its internal battery.

Digital displays are provided for oxygen saturation and pulse rate, and a 10segment LED bar indicates pulse amplitude. High and low alarm limits for saturation and pulse rate can be adjusted by the operator. The NPB-190 can operate on AC or a rechargeable internal battery power. The controls and indicators for the NPB-190 are illustrated in Figures 1-1 and 1-2.

1-1

Section 1: Introduction

1 2 3 4 5 6 7 8 9

NPB190

101112131415

Figure 1-1: NPB-190 Front Panel

1. SpO2 Sensor Port 9. Alarm Silence Button

2. Power On/Standby Button 10. Adjust Up Button

3. AC/Battery Charging Indicator 11. Adjust Down Button

4. Low Battery Indicator 12. Pulse Search Indicator

5. %SpO2 Display 13. Upper Alarm Limit Button

6. Pulse Amplitude Indicator 14. Lower Alarm Limit Button

7. Pulse Beats per Minute Display 15. Speaker

8. Alarm Silence Indicator

1. Equipotential Terminal 4. Fuse Drawer

2. AC Connector 5. Voltage Selector Switch

3. Serial Port

1.3 POWER-ON SELF TEST

When the NPB-190 is turned on it will perform a POST (Power On Self Test). During POST the following sequence should occur:

0123

T 0.50A 250V

IPX1

CISPR 11 Group 1 Class B

NRTL/C

100-120 V~ 200-240 V~ 50/60Hz

20 VA

NELLCOR PURITAN BENNETT, INC. PLEASANTON, CA 94588, U.S.A.

NELLCOR PURITAN BENNETT EUROPE BV, 's-HERTOGENBOSCH, THE NETHERLANDS

U.S. PATENTS: 4,621,643; 4,653,498; 4,700,708; 4,770,179; 4,869,254; Re. 35,122; 4,928,692; 4,934,372; 5,078,136

NPB-190

MADE IN IRELAND

Figure 1-2: NPB-190 Rear Panel

036400-1098

1-2

• All indicator lights illuminate

• All segments of the numeric digits light

• All segments of the Pulse Amplitude Display light

Section 1: Introduction

Upon completion of the POST display test, the software versions will be displayed for approximately 2 seconds. Two versions are displayed:

• The first version is indicated by the numeral “1” in the leftmost segment of

the %SpO

2 display. The series of digits and decimal points displayed to the

right of the “1” represent the main processor software version.

• The second version is indicated by the numeral “2” in the leftmost segment

of the %SpO

2 display. The number(s) appearing to the right of the “2”

represent the subprocessor software version.

The software version numbers are often needed when calling Mallinckrodt’s Technical Services Department or your local Mallinckrodt representative for technical assistance. Record the numbers and have them available prior to requesting technical assistance.

Upon successful completion of POST, the NPB-190 sounds a 1-second tone indicating that the monitor has passed the test.

If the start-up sequence is not completed as described above do not use the monitor.

1.4 RELATED DOCUMENTS

To perform test and troubleshooting procedures and to understand the principles of operation and circuit analysis sections of this manual, you must know how to operate the monitor. Refer to the NPB-190 operator’s manual. To understand the various Nellcor sensors that work with the monitor, refer to the individual sensor directions for use.

1-3

SECTION 2: ROUTINE MAINTENANCE

2.1 Cleaning

2.2 Periodic Safety and Functional Checks

2.3 Battery

2.1 CLEANING

Caution: Do not immerse the NPB-190 or its accessories in liquid or clean with caustic or abrasive cleaners. Do not spray or pour any liquid on the monitor or its accessories.

To clean the NPB-190, dampen a cloth with a commercial, nonabrasive cleaner and wipe the exterior surfaces lightly. Do not allow any liquids to come in contact with the power connector, fuse holder, or switches. Do not allow any liquids to penetrate connectors or openings in the instrument cover. Wipe sensor cables with a damp cloth. For sensors, follow the individual directions for use.

2.2 PERIODIC SAFETY AND FUNCTIONAL CHECKS

The following checks should be performed at least every 2 years by a qualified service technician:

2.3 BATTERY

1. Inspect the exterior of the NPB-190 for damage.

2. Inspect safety labels for legibility. If the labels are not legible, contact Mallinckrodt’s Technical Services Department or your local Mallinckrodt representative.

3. Verify that the unit performs properly as described in paragraph 3.3.

4. Perform the electrical safety tests detailed in paragraph 3.4. If the unit fails these electrical safety tests, do not attempt to repair.

5. Inspect the fuses in the Power Entry Module for proper value and rating. The fuses are slow blow, 0.5 amp, and 250 volt.

Mallinckrodt recommends replacing the instrument battery every 2 years. When the NPB-190 is going to be stored for 3 months or more remove the battery. To replace or remove the battery, refer to Section 6, Disassembly Guide.

If the NPB-190 has been stored for more than 30 days, charge the battery as described in paragraph 3.3.1. A fully discharged battery requires 14 hours to receive a full charge. The battery is being charged anytime the instrument is plugged into AC.

2-1

SECTION 3: PERFORMANCE VERIFICATION

3.1 Introduction

3.2 Equipment Needed

3.3 Performance Tests

3.4 Safety Tests

3.1 INTRODUCTION

This section discusses the tests used to verify performance following repairs or during routine maintenance. All tests can be performed without removing the NPB-190 cover. All tests except the battery charge and battery performance tests must be performed as the last operation before the monitor is returned to the user.

If the NPB-190 fails to perform as specified in any test, repairs must be made to correct the problem before the monitor is returned to the user.

3.2 EQUIPMENT NEEDED

Equipment Description

Digital multimeter (DMM) Fluke Model 87 or equivalent

Durasensor oxygen transducer

Oxisensor II oxygen transducer

Pulse oximeter tester SRC-2 Safety analyzer Must meet current AAMI specifications Sensor extension cable EC-4 or EC-8 Serial interface cable EIA-232 cable (optional) Stopwatch Manual or electronic

DS-100A

D-25

3.3 PERFORMANCE TESTS

The battery charge procedure should be performed before monitor repairs whenever possible. It should also be performed before and after performing the battery performance test (paragraph 3.3.2).

Note: This section is written using Mallinckrodt factory-set defaults. If your

institution has preconfigured custom defaults, those values will be displayed. Factory defaults can be reset using the configuration procedure described in paragraph 4.3.3.

3.3.1 Battery Charge

Perform the following procedure to fully charge the battery.

1. Connect the monitor to an AC power source.

3-1

Section 3: Performance Verification

2. Verify that the monitor is off and that the AC Power/Battery Charging indicator is lit.

3. Charge the battery for at least 14 hours.

3.3.2 Performance Tests

The power-up performance tests (3.3.2.1 and 3.3.2.2) verify the following monitor functions:

• Power-On Self-Test

• Factory Power-On Defaults and Alarm Limit Ranges

On/Standby Alarm Silence

NPB-190

Note: Refer to Figure 3-1, NPB-190 Controls, when following the instructions

3.3.2.1 Power-On Self-Test

1. Connect the monitor to an AC power source. Verify that the AC Power/Battery Charging indicator is lit.

2. Do not connect any input cables to the monitor.

3. Observe the monitor front panel. With the monitor off, press the Power On/Standby button. Verify that the monitor performs the following sequence:

Lower Alarm

listed below.

Limit

Upper Alarm

Limit

Figure 3-1: NPB-190 Controls

Adjust Down

Adjust

3-2

Section 3: Performance Verification

a. All indicators light for a few seconds as illustrated in Figure 3-2.

LEDs

illuminated

888 displayed

10 segments

illuminated

NPB190

LED

illuminated

LED

illuminated

Figure 3-2: Self-Test Display

b. The software version is displayed and the AC Power/Battery Charging

indicators remain on.

c. When a sensor is connected a zero is displayed in each window, a 1-

second Power-On Self-Test (POST) beep sounds and the Pulse Search LED is illuminated.

If no sensor is connected a 1 second POST beep sounds, 3 dashes are displayed in each window and the Pulse Search LED is off.

d. The NPB-190 begins normal operation if a sensor is connected.

Without a sensor the monitor will be in the idle mode (3 dashes in each window).

3.3.2.2 Factory Power-On Defaults and Alarm Limit Ranges

Note: When observing or changing default limits, a 3-second timeout is in

effect, that is, if no action is taken within 3 seconds, the monitor automatically returns to the normal mode.

1. Turn the monitor on by pressing the Power On/Standby button. Wait for POST to be completed. Press and release the Upper Alarm Limit button. Verify that the monitor emits a single beep and the %SpO a high alarm limit of “100” for about 3 seconds. Verify that three dashes are displayed at the top of the pulse rate display window.

Note: The location of the three dashes indicates the type of alarm limit that is

being adjusted. Three dashes in the top of the display window indicate a high alarm limit and three dashes in the bottom of the display window indicate a low alarm limit.

2 display indicates

Figure 3-3: Adjusting High %SpO2 Alarm Limit

Normal monitoring is resumed after 3 seconds.

3-3

Section 3: Performance Verification

2. Press the Upper Alarm Limit button. Press and hold the Adjust Down button. Verify that the %SpO

Note: A decimal point to the right of the value in either display indicates that

3. Press the Lower Alarm Limit button. Verify that the monitor emits a single beep and that the %SpO seconds. Verify that three dashes are displayed at the bottom of the pulse rate display window.

4. Press the Lower Alarm Limit button. Press and hold the Adjust Down button and verify that the %SpO Press and hold the Adjust Up button and verify that the %SpO cannot be raised past the upper alarm limit setting of “85”.

2 display reduces to a minimum of “85”.

the alarm limits are not power-on default values.

2 display indicates an alarm limit of “85” for 3

Figure 3-4: Adjusting Low %SpO2 Alarm Limit

2 display reduces to a minimum of “20”.

2 display

5. Press the Upper Alarm Limit button two times rapidly (twice within 3 seconds). Verify that the monitor emits two beeps, the pulse rate display indicates an alarm limit of “170”, and that the %SpO

2 display window

shows three dashes at the top for about 3 seconds.

Figure 3-5: Adjusting High Heart Rate Alarm Limit

6. Press the Upper Alarm Limit button two times rapidly. Press and hold the Adjust Down button. Verify that the pulse rate display reduces to a minimum of “40”.

7. Press the Lower Alarm Limit button two times rapidly. Verify that the pulse rate display indicates an alarm limit of “40” and that the %SpO

2 display

window shows three dashes at the bottom for 3 seconds.

Figure 3-6: Adjusting Low Heart Rate Alarm Limit

3-4

8. Press the Lower Alarm Limit button two times rapidly. Press and hold the Adjust Down button. Verify that the pulse rate display reduces to a minimum of “30”.

9. Press the Lower Alarm Limit button two times rapidly. Press and hold the Adjust Up button and verify that the pulse rate display cannot be adjusted above “40”.

Section 3: Performance Verification

10. Press the Power On/Standby button to turn the unit off. Turn the unit back on.

11. Press and release the Upper Alarm Limit button. Verify that the %SpO display indicates an alarm limit of “100”.

12. Press and release the Lower Alarm Limit button. Verify that the %SpO display indicates an alarm limit of “85”.

13. Press the Upper Alarm Limit button two times rapidly. Verify that the pulse rate display indicates an alarm limit of “170”.

14. Press the Lower Alarm Limit button two times rapidly. Verify that the pulse rate display indicates an alarm limit of “40”.

15. Press the Power On/Standby button to turn the monitor off.

3.3.3 Hardware and Software Tests

Hardware and software testing include the following tests:

• Operation with a Pulse Oximeter Tester

• General Operation

3.3.3.1 Operation with a Pulse Oximeter Tester

Operation with an SRC-2 pulse oximeter tester includes the following tests:

• Alarms and Alarm Silence

• Alarm Volume Control

• Pulse Tone Volume Control

• Dynamic Operating Range

• Nurse Call

3.3.3.1.1 Alarms and Alarm Silence

1. Connect the SRC-2 pulse oximeter tester to the sensor input cable and connect the cable to the monitor. Set the SRC-2 as follows:

SWITCH POSITION

RATE 38 LIGHT HIGH MODULATION OFF RCAL/MODE RCAL 63/LOCAL

2. Press the Power On/Standby button to turn the monitor on. After the normal power-up sequence, verify that the pulse rate initially indicates zeroes.

Note: The pulse bar may occasionally indicate a step change as the

monitor is in the pulse search mode.

3. Set the modulation switch on the SRC-2 to HIGH.

4. Verify the following monitor reactions:

3-5

Section 3: Performance Verification

a. The pulse blip bar begins to track the artificial pulse signal from the

b. The pulse tone is heard.

SRC-2.

c. Zeroes are displayed in the %SpO

2 and pulse rate displays.

d. After about 10 to 20 seconds, the monitor displays oxygen saturation

and pulse rate as specified by the tester. Verify that the values are within the following tolerances:

Oxygen Saturation Range 79% to 83% Pulse Rate Range 37 to 39 bpm

e. The audible alarm sounds and both the %SpO

2 and pulse rate displays

flash. This is an indication that both parameters have violated the default alarm limits.

5. Press and hold the Alarm Silence button on the front of the monitor for less than 3 seconds. Verify that the pulse rate display indicates “SEC” and the %SpO

2 display indicates “60” while the Alarm Silence button is pressed.

The alarm is silenced when the button is released.

Figure 3-7: Alarm Silence Duration

6. Release the Alarm Silence button. Verify the following:

a. The alarm remains silenced.

b. The Alarm Silence indicator lights.

c. The %SpO

2 and pulse rate displays resume flashing.

d. The pulse tone is still audible.

e. The audible alarm returns after approximately 60 seconds.

7. While pressing the Alarm Silence button, press the Adjust Down button until the %SpO

2 display indicates “30”. Press the Adjust Up button and

verify that the displays indicate 60 SEC, 90 SEC, 120 SEC, and OFF. Release the button when the display indicates “OFF”. Press the Alarm Silence button again and verify that the Alarm Silence indicator flashes.

8. Wait approximately 3 minutes. Verify that the alarm does not return. After 3 minutes ± 10 seconds, the alarm silence reminder beeps three times, and continues to do so at 3-minute intervals.

3-6

3.3.3.1.2 Alarm Volume Control

After completing the procedure in paragraph 3.3.3.1.1:

1. Press and hold the Alarm Silence button for more than 3 seconds. Verify the following:

a. “OFF” is displayed for approximately 3 seconds.

b. After 3 seconds, a steady tone is heard at the default alarm volume

setting, the %SpO indicates the default setting of 5.

2. Press the Adjust Down button until an alarm volume setting of 1 is displayed. Verify that the volume of the alarm has decreased but is still audible.

Section 3: Performance Verification

2 display indicates “VOL”, and the pulse rate display

Figure 3-8: Alarm Volume Display

3. Press the Adjust Up button to increase the alarm volume setting to a maximum value of 10. Verify that the volume increases. Press the Adjust Down button until a comfortable audio level is attained.

4. Release the Alarm Silence button. The tone stops.

3.3.3.1.3 Pulse Tone Volume Control

1. When a valid pulse has been acquired, press the Adjust Up button and verify that the beeping pulse tone sound level increases.

2. Press the Adjust Down button and verify that the beeping pulse tone decreases until it is no longer audible. Press the Adjust Up button to return the beep volume to a comfortable level.

3.3.3.1.4 Dynamic Operating Range

The following test sequence verifies proper monitor operation over a range of input signals:

1. Connect the SRC-2 to the NPB-190 and turn the NPB-190 on.

2. Place the SRC-2 in the RCAL 63/LOCAL mode.

3. Set the SRC-2 as indicated in Table 3-1. Verify that the NPB-190 readings are within the indicated tolerances. Allow the monitor several seconds to stabilize the readings.

Note: A (*) indicates values that produce an alarm. Press the Alarm Silence

button to silence the alarm.

3-7

Section 3: Performance Verification

RATE LIGHT MODULATION SpO2 Pulse Rate

38 HIGH2 LOW 79 - 83* 37 - 39* 112 HIGH1 HIGH 79 - 83* 110 - 114 201 LOW LOW 79 - 83* 198 - 204* 201 LOW HIGH 79 - 83* 198 - 204*

3.3.3.1.5 Nurse Call

Note: The Nurse Call tests must be performed with the instrument operating

1. Connect the negative lead of a voltmeter to pin 10 and positive to pin 11 of the serial port on the back of the instrument (Figure A-1 in appendix). Ensure that the audible alarm is not silenced or turned off.

2. Set the SRC-2 to create an alarm condition. Verify an output voltage at pins 10 and 11 between +5 to +12 VDC.

3. Press the Alarm Silence button. With no active audible alarm, the output voltage at pins 10 and 11 must be between -5 to -12 VDC.

Table 3-1: Dynamic Operating Range

SRC-2 Settings NPB-190 Indications

on AC power.

4. Turn the instrument off. Disconnect the voltmeter and the SRC-2.

3.3.3.1.6 Operation on Battery Power

1. Turn the instrument on using AC Power.

2. Disconnect the instrument from AC and verify that the AC Power Indicator turns off.

3. Verify that the instrument continues monitoring normally and that the Low Battery Indicator is not lit.

Note: If the Low Batter Indicator is illuminated, perform the procedure

outlined in step 3.3.1.

4. Connect the instrument to AC and verify that the AC Power Indicator turns on and that the instrument is monitoring normally.

3.3.3.2 General Operation

The following tests are an overall performance check of the system:

• LED Excitation Test

• Monitor Operation with a Live Subject

3.3.3.2.1 LED Excitation Test

This procedure uses normal system components to test circuit operation. A

Nellcor Oxisensor II

intensity control. The red LED is used to verify intensity modulation caused by the LED intensity control circuit.

3-8

oxygen transducer, model D-25, is used to examine LED

Section 3: Performance Verification

1. Connect the monitor to an AC power source.

2. Connect an EC-4 or EC-8 sensor input cable to the monitor.

3. Connect a D-25 sensor to the sensor input cable.

4. Press the Power On/Standby button to turn the monitor on.

5. Leave the sensor open with the LEDs and photodetector visible.

6. After the monitor completes its normal power-up sequence, verify that the sensor LED is brightly lit.

7. Slowly move the sensor LED in proximity to the photodetector element of the sensor. Verify, as the LED approaches the photodetector, that the LED intensity decreases.

8. Open the sensor and notice that the LED intensity increases.

9. Repeat step 7 and the intensity will again decrease. This variation is an indication that the microprocessor is in proper control of LED intensity.

10. Turn the NPB-190 off.

3.3.3.2.2 Monitor Operation with a Live Subject

Pulse oximetry involves connecting the monitor to a live subject for a qualitative test.

1. Ensure that the monitor is connected to an AC power source.

2. Connect an EC-4 or EC-8 sensor input cable to the monitor.

3. Connect a Nellcor Durasensor sensor input cable.

4. Clip the DS-100A to an adult subject as recommended in the sensor directions for use.

5. Press the Power On/Standby button to turn the monitor on and verify that the monitor is operating.

6. The monitor should stabilize on the subject’s physiological signal in about 15 to 30 seconds. Verify that the saturation and heart rates are reasonable for the subject.

3.4 SAFETY TESTS

oxygen transducer, model DS-100A, to the

NPB-190 safety tests meet the standards of, and are performed in accordance with, IEC 601-1 (EN 60601-1, Second Edition, 1988; Amendment 1, 1991-11, Amendment 2, 1995-03) and UL 2601-1 (August 18, 1994), for instruments classified as Class 1 and TYPE BF and AAMI Standard ES1 (ANSI/AAMI ES1

1993).

3-9

Section 3: Performance Verification

• Ground Integrity

• Electrical Leakage

3.4.1 Ground Integrity

This test checks the integrity of the power cord ground wire from the AC plug to the instrument chassis ground. The current used for this test is < 6V RMS 50 or 60 Hz and 25 A.

1. Connect the monitor AC mains plug to the analyzer as recommended by the analyzer operating instructions.

2. Connect the analyzer resistance input lead to the equipotential terminal (grounding lug) on the rear panel of the instrument. Verify that the analyzer indicates 100 milliohms or less.

3.4.2 Electrical Leakage

The following tests verify the electrical leakage of the monitor:

• Earth Leakage Current

• Enclosure Leakage Current

• Patient Leakage Current

• Patient Source Current (Mains on Applied Part)

Note: For the following tests, ensure that the AC switch on the rear of the

instrument is configured for the AC voltage being supplied.

3.4.2.1 Earth Leakage Current

This test is in compliance with IEC 601-1 (earth leakage current) and AAMI Standard ES1 (earth risk current). The applied voltage for AAMI ES1 is 120 VAC 60 Hz, for IEC 601-1 the voltage is 264 VAC 50 to 60 Hz. All measurements shall be made with the power switch in both the “On” and “Off” positions.

1. Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions.

2. The equipotential terminal is not connected to ground.

AC POLARITY

Normal Closed Closed 500 µA

Reversed Closed Closed 500 µA

Normal Open Closed 1000 µA Normal Closed Open 1000 µA

3.4.2.2 Enclosure Leakage Current

LINE CORD NEUTRAL

Table 3-2: Earth Leakage Current Limits

LEAKAGE

CORD

CURRENT

3-10

This test is in compliance with IEC 601-1 (enclosure leakage current) and AAMI Standard ES1 (enclosure risk current). This test is for ungrounded enclosure current, measured between enclosure parts and earth. The applied voltage for

Section 3: Performance Verification

AAMI/ANSI is 120 VAC 60 Hz, and for IEC 601-1 the applied voltage is 264 VAC 50 to 60 Hz.

1. Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions.

2. Place a 200 cm is not in contact with any metal parts of the enclosure that may be grounded. Measure the leakage current between the foil and earth.

The analyzer leakage indication must not exceed values listed in the table below:

Table 3-3: Enclosure Leakage Current Limits

AC LINE CORD

Closed Closed Closed 100 µA 100 µA Closed Closed Open 500 µA 300 µA Closed Open Closed 500 µA 300 µA

Open Closed Closed 500 µA 100 µA Open Open Closed 500 µA 300 µA Open Closed Open 500 µA 300 µA

3.4.2.3 Patient Applied Risk Current

NEUTRAL LINE CORD

This test is in compliance with AAMI Standard ES1 (patient applied risk current), and IEC 601-1 (patient auxiliary current). The leakage current is measured between any individual patient connection and power (earth) ground. The applied voltage for AAMI/ANSI is 120 VAC 60 Hz, and for IEC 601-1 the applied voltage is 264 VAC 50 to 60 Hz.

foil in contact with the instrument case making sure the foil

POWER LINE GROUND CABLE

IEC 601-1 AAMI/ANSI ES1

STANDARD

1. Configure the electrical safety analyzer as follows:

Function: Patient Leakage Range: µA

2. Connect the monitor AC plug to the electrical safety analyzer as recommended by the analyzer operating instructions for Patient Leakage Current.

3. Connect the electrical safety analyzer patient leakage input lead to all pins of the monitor's patient cable at the end of the cable.

4. The equipotential terminal is not connected to ground.

5. All functional earth terminals are not connected to ground.

6. Measure the leakage current between the patient connector and earth.

3-11

Section 3: Performance Verification

Table 3-4: Patient Leakage Current Limits

AC LINE POLARITY

Normal Closed Closed 100 µA 10 µA Normal Open Closed 500 µA 50 µA

Normal Closed Open 500 µA 50 µA Reverse Closed Closed 100 µA 10 µA Reverse Open Closed 500 µA 50 µA Reverse Closed Open 500 µA 50 µA

3.4.2.4 Patient Isolation Risk Current - (Mains Voltage on the Applied Part)

NEUTRAL LINE

POWER LINE GROUND CABLE

IEC 601-1 AAMI/ANSI

This test is in compliance with AAMI Standard ES1 (patient isolation risk current [sink current]), and IEC 601-1 (patient leakage current). Patient Leakage Current is the measured value in a patient connection if mains voltage is connected to that patient connection. The applied voltage for AAMI/ANSI is 120 VAC 60 Hz, and for IEC 601-1 the applied voltage is 264 VAC 50 to 60 Hz.

Warning: AC mains voltage will be present on the patient applied part terminals during this test. Exercise caution to avoid electrical shock hazard.

1. Configure the electrical safety analyzer as follows:

Function: Patient Leakage (Mains On Applied Part) Range: µA

ES1 STANDARD

2. Connect the monitor AC plug to the electrical safety analyzer as recommended by the operating instructions for patient sink (leakage) current.

3. Connect the electrical safety analyzer patient leakage input lead to all connectors in the patient cable at the patient end of the cable.

4. The equipotential terminal is not connected to ground.

5. All functional earth terminals are not connected to ground.

6. The analyzer leakage current must not exceed the values shown in the table below.

Table 3-5: Patient Leakage Current Test Configurations -

Mains Voltage on the Applied Part

AC LINE POLARITY

Normal Closed Closed 5 mA 50 µA

Reverse Closed Closed 5 mA 50 µA

NEUTRAL LINE

POWER LINE GROUND CABLE

IEC 601-1 AAMI/ANSI

ES1 STANDARD

3-12

SECTION 4: AUDIBLE ALARM SETTINGS & SERVICE MENU

4.1 Introduction

4.2 Audible Alarm Settings

4.3 Service Menu

4.1 INTRODUCTION

This section discusses use of the service menu to reconfigure power-on default values, and how to control the behavior of the audible alarm.

4.2 AUDIBLE ALARM SETTINGS

The following paragraphs describe how to change the behavior of the audible alarm. Operators can select the volume of the alarm and the duration of alarm silence. Controls for the NPB-190 are shown in Figure 4-1.

On/Standby Alarm silence

NPB190

4.2.1 Alarm Silence State

Press the Alarm Silence button to silence the alarm. Press the button a second time to turn the alarm back on.

4.2.2 Alarm Silence Duration

1. Press and hold the Alarm Silence button for less than 3 seconds.

2. Before 3 seconds have passed the Adjust Up or Adjust Down button can be used to change the duration of the alarm silence. The alarm’s duration can be 30, 60, 90, 120 seconds, or the alarm can be turned off.

4.2.3 Alarm Volume

1. Press and hold the Alarm Silence button for more than 3 seconds.

Set lower

limit

Set upper

limit

Figure 4-1: NPB-190 Controls

Adjust

down

Adjust

4-1

Section 4: Audible Alarm Settings & Service Menu

2. After 3 seconds, while still pressing the Alarm Silence button, the Adjust Up or Adjust Down button can be used to select alarm volumes from 1 to

10. Select a level that is suitable for the monitor’s location.

4.3 SERVICE MENU

The menu items listed below should be accessed only by a qualified service technician. Power-on default values can be changed for the behavior of the audible alarm, alarm limits, and for the serial port.

4.3.1 Accessing Menu Items

1. Menu items can be accessed at any time by pressing the Upper and Lower Alarm Limit buttons simultaneously for at least 3 seconds. The service menu has been accessed when a 1 appears in the pulse rate display.

2. Pressing the Adjust Up or Adjust Down button selects the menu item number. Menu numbers 5 and 6, have items within them that can be selected by first pressing the Upper Alarm Limit button, and then pressing the Adjust Up or Adjust Down key.

Note: Service menu items greater than 2 cannot be accessed if a sensor is

connected to the monitor.

3. Once adjustments have been made within a menu item the, Upper Alarm Limit button can be used to initiate the current selection. Three tones will sound to indicate that the change has been accepted, and the monitor will return to normal monitoring.

4. The service menu can be exited without making changes by pressing the Lower Alarm Limit button. If a period of 10 seconds passes with no button presses, the instrument will exit the service menu, go to normal monitoring, and no changes will have been made.

4.3.2 Menu Item 1 (Save Current Values as Power-On Default)

1. If menu item 1 is selected, the current values for alarm limits, alarm volume, pulse beep volume, audible alarm silence duration, alarm silence behavior, and baud rate will be saved as the power-on default settings. Some values are not allowed to be saved as power on default values, they are; an Alarm Silence Duration of Off, and low %SpO invalid tone is heard instead of the triple beep the current settings were not changed.

Note: Current values will not be stored in memory as defaults, if power is

interrupted before exiting this menu option.

Note: When the operator changes an alarm limit to a value other than a power

on default value, a decimal point will appear to the right of the parameter whose alarm limit was changed.

2 alarm limits less than 80%. If an

4-2

4.3.3 Menu Item 2 (Return to Default Settings)

Menu item 2 resets the monitor to factory default settings as shown in table 4-1.

Table 4-1: Factory Default Settings

Parameter Default Value

SpO2 High 100% SpO2 Low 85% Pulse rate High 170 bpm Pulse rate Low 40 bpm Pulse beep volume Level 4 Alarm Volume Level 5 Alarm Silence Duration 60 seconds Alarm Silence Behavior 0 (Off with reminder) Baud Rate 9600

Note: Menu items greater than 2 cannot be accessed when a valid sensor is

plugged into the unit.

Note: To reach menu item 5 two invalid tones will be heard when passing

through menu items 3 and 4.

Section 4: Audible Alarm Settings & Service Menu

4.3.4 Menu Item 3 (Not Displayed)

4.3.5 Menu Item 4 (Not Displayed)

4.3.6 Menu Item 5 (Alarm Silence Behavior)

1. This menu item is used to change alarm silence behavior. Three options; 0, 1, or 2 can be accessed by first pressing the Upper Alarm Limit button, then using the Adjust Up or Down button to scroll to the desired number.

2. Option “0” will allow the operator to select Alarm Silence, but there will be a reminder tone every 3 minutes.

3. Option “1” allows the operator to select Alarm Silence and there will be no reminder tone.

4. Option “2” will not allow the operator to select Alarm Silence.

5. When the desired option is indicated in the display, press the Upper Alarm Limit button to save the current selection. Three tones will sound to indicate that the change has been accepted

Note: The low battery audible alarm cannot be disabled.

4.3.7 Menu Item 6 (Baud Rate)

1. Baud rates of 2400, 9600, and 19200 can be selected by first pressing the Upper Alarm Limit button, then using the Adjust Up or Adjust Down button to select the desired baud rate. The baud rates will be displayed in the %SpO

2 window as 24, 96, or 192.

4-3

Section 4: Audible Alarm Settings & Service Menu

2. When the desired option is indicated in the display, press the Upper Alarm Limit button to save the current selection. Three tones will sound to indicate that the change has been accepted.

4.3.8 Menu Item 7

Do not use. For use by Mallinckrodt Customer Service Engineer.

4.3.9 Menu Item 8

Do not use. For use by Mallinckrodt Customer Service Engineer.

4.3.10 Menu Item 9

Do not use. For use by Mallinckrodt Customer Service Engineer.

4-4

SECTION 5: TROUBLESHOOTING

5.1 Introduction

5.2 How to Use this Section

5.3 Who Should Perform Repairs

5.4 Replacement Level Supported

5.5 Obtaining Replacement Parts

5.6 Troubleshooting Guide

5.7 Error Codes

5.1 INTRODUCTION

This section explains how to troubleshoot the NPB-190 if problems arise. Tables are supplied that list possible monitor difficulties, along with probable causes, and recommended actions to correct the difficulty.

5.2 HOW TO USE THIS SECTION

Use this section in conjunction with Section 3, Performance Verification, and Section 7, Spare Parts. To remove and replace a part you suspect is defective, follow the instructions in Section 6, Disassembly Guide. The circuit analysis section in the Technical Supplement offers information on how the monitor functions.

5.3 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 Mallinckrodt Technical Services or your local Mallinckrodt representative.

5.4 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 Section 6, Disassembly Guide, to replace the PCB with a known good PCB. 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 section.

5.5 OBTAINING REPLACEMENT PARTS

Mallinckrodt Technical Services provides technical assistance information and replacement parts. To obtain replacement parts, contact Mallinckrodt or your local Mallinckrodt representative. Refer to parts by the part names and part numbers listed in Section 7, Spare Parts.

5-1

Section 5: Troubleshooting

5.6 TROUBLESHOOTING GUIDE

Problems with the NPB-190 are separated into the categories indicated in Table 5-1. Refer to the paragraph indicated for further troubleshooting instructions.

Note: Taking the recommended actions discussed in this section will correct

the majority of problems you will encounter. However, problems not covered here can be resolved by calling Mallinckrodt Technical Services or your local representative.

Problem Area Refer to Paragraph

1. Power

• No power-up on AC and/or DC

• Fails power-on self-test

• Powers down without apparent cause

2. Buttons

• Monitor does not respond properly to

buttons

3. Display/Alarms

• Displays do not respond properly

• Alarms or other tones do not sound

properly or are generated without apparent cause

4. Operational Performance

• Displays appear to be operational, but

monitor shows no readings

• Suspect readings

5. Serial Port

• NPB-190 and PC not communicating

properly

• Nurse Call not functioning properly

Table 5-1: Problem Categories

5.6.1

5.6.2

5.6.3

5.6.4

5.6.5

5-2

All of the categories in Table 5-1 are discussed in the following paragraphs.

5.6.1 Power

Section 5: Troubleshooting

Power problems are related to AC and/or DC. Table 5-2 lists recommended actions to power problems.

Table 5-2: Power Problems

Condition Recommended Action

1. BATTERY LOW

indicator lights steadily while NPB190 is connected to AC and battery is fully charged.

2. The NPB-190 does

not operate when disconnected from AC power.

3. BATTERY LOW

indicator on during DC operation and an alarm is sounding.

1. Ensure that the NPB-190 is plugged into an operational AC outlet and the AC indicator is on.

2. Check the fuses. The Power Entry Module contains the fuses as indicated in paragraph 6.3 and Figure 6-3 of the Disassembly Guide section. Replace if necessary.

3. Open the monitor as described in section 6. Verify power supply’s output to the battery while on AC. Disconnect the battery leads from the battery and connect a DVM to them. The voltage measured should be 6.8 VDC + 0.15 and the current should be 400 mA + 80 mA. Replace power supply if above values are not met.

4. Check the cable connection from the bottom enclosure to the UIF PCB, as instructed in paragraph 6.5 of the Disassembly Guide section. If the connection is good, replace the UIF PCB.

1. The battery may be discharged. To recharge the battery, refer to paragraph 3.3.1, Battery Charge. The monitor may be used with a less than fully charged battery but with a corresponding decrease in operating time from that charge.

2. If the battery fails to hold a charge, replace the battery as indicated in Section 6, Disassembly Guide.

There are 15 minutes or less of usable charge left on the NPB-190 battery before the instrument shuts off. At this point, if possible, cease use of the NPB-190 on battery power, connect it to an AC source, and allow it to recharge. The full recharge takes 14 hours. The NPB-190 may continue to be used while it is recharging.

4. Battery does not charge.

1. Replace battery if more than 2 years old.

2. Open the monitor as described in Section 6. Verify power supply’s output to the battery while on AC. Disconnect the battery leads from the battery and connect a DVM to them. The voltage measured should be 6.8 VDC ± 0.15 and the current should be 400 mA ± 80 mA. Replace power supply if above values are not met.

5-3

Section 5: Troubleshooting

5.6.2 Buttons

Table 5-3 lists symptoms of problems relating to nonresponsive buttons and recommended actions. If the action requires replacement of a PCB, refer to Section 6, Disassembly Guide.

Condition Recommended Action

1. The NPB-190 responds to some, but not all buttons.

Table 5-3: Button Problems

1. Replace Top Housing assembly.

2. If the buttons still do not work, replace the UIF PCB.

5.6.3 Display/Alarms

2. The NPB-190 turns on but does not respond to any of the buttons.

1. Check the connection between the membrane panel and J5 of the UIF PCB.

2. Replace Top Housing assembly.

3. If the buttons still do not work, replace the UIF PCB.

Table 5-4 lists symptoms of problems relating to nonfunctioning displays, audible tones or alarms, and recommended actions. If the action requires replacement of a PCB or module, refer to Section 6, Disassembly Guide.

Table 5-4: Display/Alarms Problems

Condition Recommended Action

1. Display values are missing or erratic.

1. Try another sensor or relocate the sensor to a different site.

2. If the sensor is connected, replace the sensor connector assembly.

3. If the condition persists, replace the sensor extension cable.

4. If the condition still persists, replace the UIF PCB.

5-4

2. All display segments do not light during POST.

3. All Front Panel LED indicators do not light during POST.

4. Alarm sounds for no apparent reason.

1. Check the connection between the UIF PCB and the Display PCB.

2. If the condition does not change, replace the Display PCB.

3. If the condition still persists, replace the UIF PCB.

1. Check the connection between the membrane panel and J5 of the UIF PCB.

2. Replace Top Housing assembly.

1. Moisture or spilled liquids can cause an alarm to sound. Allow the monitor to dry thoroughly before using.

2. If the condition persists, replace the UIF PCB.

Section 5: Troubleshooting

Table 5-4: Display/Alarms Problems (cont. from page 5-4)

Condition Recommended Action

5. Alarm does not sound. 1. Check speaker connection to UIF PCB.

2. Replace the speaker as described in Section 6, Disassembly Guide.

3. If the condition persists, replace the UIF PCB.

Table 5-5 lists symptoms of problems relating to operational performance (no error codes displayed) and recommended actions. If the action requires replacement of a PCB or module, refer to Section 6, Disassembly Guide.

Table 5-5: Operational Performance Problems

Condition Recommended Action

1. The Pulse Amplitude indicator seems to indicate a pulse, but the digital displays show zeroes.

2. SpO2 or pulse rate values change rapidly; Pulse Amplitude indicator is erratic.

1. The sensor may be damaged; replace it.

2. If the condition still persists, replace the UIF PCB.

1. The sensor may be damp or may have been reused too many times. Replace it.

2. An electrosurgical unit (ESU) may be interfering with performance:

ñ Move the NPB-190 and its cables and

sensors as far from the ESU as possible.

ñ Plug the NPB-190 and the ESU into

different AC circuits.

ñ Move the ESU ground pad as close to the

surgical site as possible and as far away from the sensor as possible.

3. Verify performance with the procedures detailed in Section 3.

4. If the condition still persists, replace the UIF PCB.

5-5

Section 5: Troubleshooting

5.6.5 Serial Port

Table 5-6 lists symptoms of problems relating to the serial port and recommended actions. If the action requires replacement of the PCB, refer to Section 6, Disassembly Guide.

Condition Recommended Action

Table 5-6: Serial Port Problems

1. No printout is being received.

2. The Nurse Call function is not working.

1. The unit is running on battery power. Connect to an AC source. If the AC indicator is not on see section 5.6.1.

2. The monitor’s baud rate does not match the printer. Change the baud rate of the monitor following instructions in section 4.3.7.

3. Check connections between serial port and printer (see section A3).

4. If the condition still persists, replace the UIF PCB.

1. The unit is running on battery power. Connect to an AC source. If the AC indicator is not on see section 5.6.1.

2. Verify that connections are made between pins 5 or 10 (GND) and 11 (Nurse Call) of the serial port.

3. Verify that output voltage between ground pin 5 or 10 and pin 11 is -5 to -12 VDC (no alarm) and +5 to +12 VDC (during alarm).

4. If the condition still persists, replace the UIF PCB.

5-6

5.7 ERROR CODES

Section 5: Troubleshooting

An error code will be displayed when the NPB-190 detects a non-correctable failure. When this occurs, the unit will stop monitoring, sound a low priority alarm that cannot be silenced, clear patient data from the display, and display an error code. Error codes will be displayed with EEE in the Saturation display and the number of the code in the Pulse Rate display, i.e., EEE 1. Table 5-7 provides a complete list of error codes and possible solutions.

Table 5-7: Error Codes

Code Meaning Possible Solutions

POST failure Replace UIF PCB

Battery dead 1. Check the voltage selector

switch.

2. Charge battery for 14 hours

3. Leads of battery reversed; see paragraph 6.5

4. Replace battery

Too many microprocessor resets

within a period of time

Boot CRC error Replace UIF PCB

Error on UIF PCB 1. Cycle power to clear error.

1. Replace UIF PCB

2. Replace Power Supply

2. Check voltage selector switch for proper setting.

3. Replace UIF PCB

Flash ROM corruption Replace UIF PCB

Error accessing EEPROM Replace UIF PCB

Institutional default values lost

Replace UIF PCB and reset to factory default values

Internal communications error Replace UIF PCB

5-7

SECTION 6: DISASSEMBLY GUIDE

6.1 Introduction

6.2 Prior to Disassembly

6.3 Fuse Replacement

6.4 Monitor Disassembly

6.5 Monitor Reassembly

6.6 Battery Replacement

6.7 Power Entry Module (PEM) Removal/Installation

6.8 Power Supply Removal/Installation

6.9 Display PCB Removal/Installation

6.10 UIF PCB Removal/Installation

6.11 Alarm Speaker Removal/Installation

6.1 INTRODUCTION

The NPB-190 can be disassembled down to all major component parts, including:

• PCBs

• Battery

• Top and Bottom Housing

• Speaker

• Power Entry Module (PEM)

The following tools are required:

• Phillips-head screwdriver #1

• 10 mm open-end wrench

• Needle-nose pliers

• Torque wrench, 10 inch-pounds (1.13 newton-meters)

• Wire Cutters

WARNING: Before attempting to open or disassemble the NPB-190, disconnect the power cord from the NPB-190.

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

Note: Some spare parts have a business reply card attached. When you receive

these spare parts, please fill out and return the card.

6.2 PRIOR TO DISASSEMBLY

1. Turn the NPB-190 off by pressing the Power On/Standby button.

2. Disconnect the monitor from the AC power source.

6-1

Section 6: Disassembly Guide

6.3 FUSE REPLACEMENT

1. Complete the procedure in paragraph 6.2.

2. Disconnect the power cord from the back of the monitor.

3. Remove the fuse drawer from the Power Entry Module by pressing down on the tab in the center and pulling the drawer out as shown in Figure 6-1.

Figure 6-1: Fuse Removal

4. Put new 0.5 amp fuses in the drawer and reinsert the drawer in the power module.

6-2

6.4 MONITOR DISASSEMBLY

Caution: Observe ESD (electrostatic discharge) precautions when disassembling and reassembling the NPB-190 and when handling any of the components of the NPB-190.

1. Set the NPB-190 upside down, as shown in Figure 6-2.

Section 6: Disassembly Guide

Corner screws

Figure 6-2: NPB-190 Corner Screws

2. Remove the four corner screws.

3. Turn the unit upright. Separate the top case from the bottom case of the monitor being careful not to stress the wire harnesses between the cases. Place the two halves of the monitor on the table as shown in Figure 6-3.

4. Disconnect the Power Supply from J6 on the UIF PCB.

6-3

Section 6: Disassembly Guide

Power supply harness

6.5 MONITOR REASSEMBLY

1. Place the two halves of the monitor on the table as shown in Figure 6-3 and connect the Power Supply to J6 on the UIF PCB.

2. Place the top case over the bottom case and align the four outside screw posts and close the monitor.

Caution: When reassembling the NPB-190, hand tighten the screws that hold the cases together to a maximum of 10 inch-pounds. Over-tightening could strip out the screw holes in the top case, rendering them unusable.

3. Install the four corner screws.

6-4

Figure 6-3: Separating Case Halves

6.6 BATTERY REPLACEMENT

Removal

1. Follow procedure in paragraphs 6.2 and 6.4.

2. Remove the two screws from the battery bracket shown in Figure 6-4 and lift the battery out of the bottom case.

3. Use needle-nose pliers to disconnect the leads from the battery.

Section 6: Disassembly Guide

Figure 6-4: Battery Removal

4. The lead-acid battery is recyclable. Do not dispose of the battery by placing it in the regular trash. Dispose of properly according to state, local or other applicable regulations, or contact Mallinckrodt Technical Services to return for disposal.

Installation

5. Connect the leads to the battery. The red wire connects to the positive terminal and the black wire goes to the negative.

6. Insert the new battery into the bottom case with the negative terminal towards the bottom of the monitor. Install the bracket and grounding lead with the two screws.

7. Complete the procedure in paragraph 6.5.

6-5

Section 6: Disassembly Guide

8. Turn the monitor on and verify proper operation.

6.7 POWER ENTRY MODULE (PEM) REMOVAL/INSTALLATION

Removal

1. Complete the procedure in paragraphs 6.2 and 6.4.

2. While pushing the top of the PEM in from the outside of the case, gently push the case to the outside and lift up on the PEM.

3. Use needle-nose pliers to disconnect the leads from the PEM (see Figure 6-

5).

6-6

Figure 6-5: Power Entry Module

Installation

4. Reconnect the three leads. The blue “N” wire, from the power supply goes to the terminal labeled “N” on the PEM. The brown “L” wire, from the power supply connects to the terminal labeled “L” on the PEM. The center terminal at the top of the PEM is for the ground wire (Figure 6-6).

5. Install the PEM in the bottom case with the fuse drawer facing down. A tab in the bottom case holds the PEM in place. Insert the bottom wing of the PEM between the tab and the internal edge of the side wall of the bottom case. Push the PEM down and towards the outside of the monitor until it clicks into place.

6. Position the ground line from the PEM so that it does not come into contact with components on the Power Supply PCB.

7. Complete procedure in paragraph 6.5.

6.8 POWER SUPPLY REMOVAL/INSTALLATION

Removal

1. Complete the procedure described in paragraphs 6.2 and 6.4.

2. Disconnect the leads from the battery.

3. Follow the procedure in paragraph 6.7, steps 2 and 3.

4. Use a 10mm wrench to disconnect the Power Supply ground lead from the equipotential lug (Figure 6-6).

5. Remove the seven screws shown in Figure 6-7.

Section 6: Disassembly Guide

6. Lift the Power Supply out of the bottom case.

Equipotential

Lug

Brown to

"L" on

PEM

Equipotential

Lug

Blue to

"N" on

PEM

Black

Red

Figure 6-6: Power Supply Leads Connections

6-7

Section 6: Disassembly Guide

Figure 6-7: Power Supply

Installation

7. Reconnect the AC leads. The wire from the Power Supply labeled “N” goes to the terminal labeled “N” on the PEM. The wire from the power supply labeled “L” connects to the terminal labeled “L” on the PEM.

8. Place the Power Supply in the bottom case.

Caution: When installing the Power Supply, tighten the seven screws to a maximum of 10 inch-pounds. Overtightening could strip out the inserts in the bottom case, rendering them unusable.

9. Install the seven screws in the Power Supply and tighten.

10. Use a 10mm wrench to connect the power supply ground lead to the equipotential lug. Tighten to 12 inch pounds.

11. Follow the procedure in paragraph 6.7, step 5.

12. Connect the ground wire to the PEM and position it so that it does not come into contact with components on the Power Supply PCB.

6-8

13. Complete the procedure in paragraph 6-5.

6.9 DISPLAY PCB REMOVAL/INSTALLATION

Removal

1. Complete the procedure described in paragraphs 6.2 and 6.4.

2. Lift the Display PCB up to remove it from the top case (Figure 6-8).

Grounding clip

Section 6: Disassembly Guide

Figure 6-8: Display PCB

Installation

3. Slide the Display PCB into the grooves in the top case, being careful to align the male pins from the Display PCB to connector J4 on the UIF PCB.

4. Complete the procedure in paragraph 6.5.

6-9

Section 6: Disassembly Guide

6.10 UIF PCB REMOVAL/INSTALLATION

Removal

1. Complete the procedure described in paragraphs 6.2 and 6.4.

2. Lift the Display PCB up to remove it from the top case (Figure 6-8).

3. Disconnect the keypad ribbon cable from J5 of the UIF PCB (Figure 6-8). J5 is a ZIF connector, lift up on the outer shell until it clicks, then remove the ribbon cable from the connector.

4. Disconnect the speaker cable from J3 of the UIF PCB.

5. Remove the five screws in the UIF PCB (Figure 6-9).

6-10

Figure 6-9: UIF PCB

6. Remove the UIF PCB from the top case.

Installation

Caution: When installing the UIF PCB, hand-tighten the five screws to a maximum of 10 inch-pounds. Overtightening could strip out the inserts in the top case, rendering them unusable.

7. Place the UIF PCB in the top case.

8. Install the five screws in the UIF PCB.

9. Lift up on the outer shell of J5 on the UIF PCB until it clicks. Insert the keypad ribbon cable into J5 of the UIF PCB. Slide the outer shell of J5 down until it clicks.

10. Connect the speaker cable to J3 of the UIF PCB.

11. Slide the Display PCB into the grooves in the top case being careful to align the male pins from the Display PCB to connector J4 on the UIF PCB.

12. Complete the procedure in paragraph 6.5.

6.11 ALARM SPEAKER REMOVAL/INSTALLATION

Removal

Section 6: Disassembly Guide

1. Complete the procedure described in paragraphs 6.2 and 6.4.

2. Disconnect the speaker wire harness for J3 on the UIF PCB (see Figure 6-

10).

3. Pull the holding clip towards the center of the monitor and lift the speaker from the top housing.

6-11

Section 6: Disassembly Guide

Connect speaker

wires to J3 connector

Figure 6-10: Alarm Speaker

Installation

4. Slide the speaker into the plastic holding clip provided in the top housing.

5. Connect the speaker wire harness to J3 on the UIF PCB.

6. Complete the procedure paragraph 6.5.

6-12

SECTION 7: SPARE PARTS

7.1 Introduction

7.1 INTRODUCTION

Spare parts, along with part numbers, are shown below. Item numbers correspond to the numbers called out in Figure 7-1.

Item Description Part No.

1 Top Case Assembly (Membrane Panel Included) 048428 2 Fuse Drawer 691500 3 Fuses 691032 4 Power Entry Module 691499 5 Power Supply 035200 6 Display PCB 035196 7 Battery 640119 8 Battery Bracket 035307 9 UIF PCB 035192

Sensor Lock (not shown) 022943 Alarm Speaker (not shown) 033494 Ground Clip (not shown) 035400 Rubber Feet (not shown) 4-003818-00 Power Cord (not shown) U.S. 071505

International 901862 U.K. 901863

Figure 7-1 shows the NPB-190 expanded view with item numbers relating to the spare parts list.

Note: Some spare parts have a business reply card attached. When you receive

these spare parts, please fill out and return the card.

7-1

Section 7: Spare Parts

NPB190

Figure 7-1: NPB-190 Exploded View

7-2

SECTION 8: PACKING FOR SHIPMENT

8.1 General Instructions

8.2 Repacking in Original Carton

8.3 Repacking in a Different Carton

To ship the monitor for any reason, follow the instructions in this section.

8.1 GENERAL INSTRUCTIONS

Pack the monitor carefully. Failure to follow the instructions in this section may result in loss or damage not covered by the Mallinckrodt warranty. If the original shipping carton is not available, use another suitable carton; North American customers may call Mallinckrodt Technical Services Department to obtain a shipping carton.

Before shipping the NPB-190, contact Mallinckrodt Technical Services Department for a returned goods authorization (RGA) number. Mark the shipping carton and any shipping documents with the RGA number. European customers not using RGA numbers, should return the product with a detailed, written description of the problem.

8.2 REPACKING IN ORIGINAL CARTON

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

1. Place the monitor in a plastic bag (not shown) and, if necessary, accessory items in original packaging.

8-1

Section 8: Packing for Shipment

8-2

Figure 8-1: Repacking the NPB-190

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

3. Label carton with shipping address, return address and RGA number.

8.3 REPACKING IN A DIFFERENT CARTON

If the original carton is not available, use the following procedure to pack the NPB-190:

1. Place the monitor in a plastic bag.

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

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

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

5. Seal the carton with packing tape.

6. Label the carton with the shipping address, return address, and RGA number.

Section 8: Packing for Shipment

8-3

SECTION 9: SPECIFICATIONS

9.1 General

9.2 Electrical

9.3 Physical Characteristics

9.4 Environmental

9.5 Alarms

9.6 Factory Default Settings

9.7 Performance

9.1 GENERAL

Designed to meet safety requirements of:

UL 2601-1 CSA-C22.2 No. 601-1-M90, IEC 601-1 (Class I, type BF) EMC per EN60601-1-2

9.2 ELECTRICAL

Protection Class

Class I: per IEC 601-1, clause 2.2.4

Degree of Protection

Type BF: per IEC 601-1, clause 2.2.25

Mode of Operation

Continuous

Battery

Type Rechargeable, sealed lead-acid, internal

Operating time 12 hours minimum on new, fully charged

battery

Recharge period 14 hours for full charge

Fuses 2 each 5 X 20 mm

Slow Blow. 0.5 amp, 250 volts

AC Power

Selectable by switch 100-120 VAC 50/60 Hz or

200-240 VAC 50/60 Hz

9-1

Section 9: Specifications

9.3 PHYSICAL CHARACTERISTICS

Dimensions 3.3 in H x 10.4 in W x 6.8 in D

Weight 5.5 lb

9.4 ENVIRONMENTAL

Operating Temperature 5°C to 40°C (+41°F to +104°F)

Storage Temperature

Boxed -20°C to +70°C (-4°F to +158°F)

Unboxed -20°C to +60°C (-4°F to +140°F)

Operating Atmospheric Pressure 700 hPa to 1060 hPa

Relative Humidity 15% RH to 95% RH, noncondensing

8.4 cm H x 26.4 cm W x 17.3 cm D

2.5 kg

(20.65 inHg to 31.27 inHg)

9.5 ALARMS

Alarm Limit Range

% Saturation 20–100%

Pulse Rate 30–250 bpm

9.6 FACTORY DEFAULT SETTINGS

Parameter Default Setting

SpO2 High Alarm 100% SpO2 Low Alarm 85% High pulse rate Alarm 170 bpm Low pulse rate Alarm 40 bpm Audible Alarm Volume Level 5 Audible Alarm Silence Duration 60 seconds Pulse Beep Volume Level 4 Communication Protocol Serial output mode ASCII Alarm Silence Behavior Off with a reminder Baud Rate 9600

9-2

9.7 PERFORMANCE

Measurement Range

SpO2: 0–100%

Pulse/Heart Rate: 20–250 bpm

Accuracy

SpO

Adult: 70–100% ± 2 digits

Neonate: 70–100% ± 3 digits

Accuracies are expressed as plus or minus “X” digits (saturation percentage points) between saturations of 70-100%. This variation equals plus or minus one standard deviation (1SD), which encompasses 68% of the population. All accuracy specifications are based on testing the subject monitor on healthy adult volunteers in induced hypoxia studies across the specified range. Adult accuracy is determined with Oxisensor II D-25 sensors. Accuracy for neonatal readings is determined with Oxisensor II N-25 sensors. In addition, the neonatal accuracy specification is adjusted to take into account the theoretical effect of fetal hemoglobin in neonatal blood on oximetry measurements.

Section 9: Specifications

0–69% unspecified

Pulse Rate (optically derived) 20–250 bpm ± 3 bpm

Accuracies are expressed as plus or minus “X” bpm across the display range. This variation equals plus or minus 1 Standard Deviation, which encompasses 68% of the population.

9-3

APPENDIX (SERIAL PORT INTERFACE PROTOCOL)

A1 Introduction A2 Enabling the Serial Port A3 Connecting to the Serial Port A4 Real-Time Print Out A5 Nurse call

A1 INTRODUCTION

When connected to the serial port on the back of the NPB-190, a real-time printout can be obtained. Data lines are printed at 2 second intervals. Column headings will be printed after every 25 lines, or if one of the values in the column heading changes. Changing an alarm limit, for example, would cause a new column heading to be printed. Printouts include patient and device data. A real-time printout cannot be obtained if the unit is operating on battery power. The real-time printout is discussed in more detail in Paragraph A4.

A2 ENABLING THE SERIAL PORT

Real-time data is constantly being sent to the serial port of the NPB-190 when the instrument is operating on AC power. To receive a real-time printout, see Paragraph A3 for instructions to make the connection.

Menu Item 6 is used to change baud rate. Item 6 cannot be accessed when a sensor cable is connected to the instrument. To access menu Item 6, press both the Upper Alarm Limit and the Lower Alarm Limit buttons simultaneously for 3 seconds. Next, press the Upper Alarm Limit button until menu Item 6 is displayed. The baud rate can then be selected by pressing the Adjust Up or Adjust Down button until the desired baud rate is displayed. A baud rate of 9600 is selected as a default value. Other baud rates that can be selected are 2400 and

19200.

A3 CONNECTING TO THE SERIAL PORT

Data is transmitted in the RS-232 format. Only three lines are used; GND is the ground, TxD represents the Transmit Data Line, and RxD is the Receive Data Line. Data can be transmitted a maximum of 25 feet. The pin outs for the serial port are listed in the chart below.

Table A-1: Serial Port Pin Outs

Pin Line

2RxD 3TxD 5,10 GND 11 Nurse call 1, 4, 6-9, 12-15 No Connection

A-1

Appendix

The pin layouts are illustrated in Figure A-1. The conductive shell is used as earth ground. An AMP connector is used to connect to the serial port. Use AMP connector (AMP p/n 747538-1), ferrule (AMP p/n 1-747579-2) and compatible pins (AMP p/n 66570-2).

The serial cable must be shielded. Connectors at both ends of the serial cable must have the shield terminated to the full 360 degrees of the connector’s metal shell. If rough handling or sharp bends in the cable is anticipated, use a braided shield.

A4 REAL-TIME PRINTOUT

When a real-time printout is being received, a new line of data is printed every 2 seconds. Every 25th line will be a column heading line. A column heading line will also be printed any time a value in the column heading line is changed. A real-time printout is shown below in Figure A-2

9 101112131415

12345678

Figure A-1: Serial Port Pin Layout

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status 123456789 100 120 220 123456791 100 124 220 123456793 100 190 220 123456795 100 190* 220 PH 123456797 100 190* 220 PH 123456799 100 190* 220 PH 123456801 100 190* 220 PH 123456803 100 190* 220 PH 123456805 100 190* 220 PH LB 123456807 100 190* 220 PH LB 123456809 100 190* 220 PH LB 123456811 - - - - - - - - - SD LB 123456813 - - - - - - - - - SD LB 123456815 - - - - - - - - - SD 123456817 - - - - - - - - - SD 123456819 - - - - - - - - - SD 123456821 - - - - - - - - - SD 123456823 - - - - - - - - - PS 123456825 - - - - - - - - - PS 123456827 - - - - - - - - - PS 123456829 - - - - - - - - - PS 123456831 - - - - - - - - - PS 123456833 - - - - - - - - - PS NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status 123456835 - - - - - - - - - PS NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 80-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status 123456837 79* 59* 220 SL PL LB 123456839 79* 59* - - - PS SL PL LB

A-2

Figure A-2: Real-Time Printout

A4.1 Column Headings

Appendix

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status

To explain the printout, it will be necessary to break it down to its key components. The first two lines of the chart are the column headings shown above. Every 25th line will be a column heading. A column heading is also printed whenever a value of the column heading is changed. There are three column heading lines shown in Figure A-2. Using the top row as the starting point, there are 25 lines before the second column heading is printed. The third column heading was printed because the SpO

2 limits changed from 30-100% to

80-100%.

Printout Source

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status

Data in the highlighted box above represents the source of the printout, in this case the NPB-190.

Software Revision Level

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status

The next data field tells the user the software level, (Version 1.0.0) and a software verification number (CRC XXXX). Neither of these numbers should change during normal operation. The numbers will change if the monitor is serviced and receives a software upgrade.

Alarm Limits

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status

The last data field in the top line indicates the high and low alarm limits for %SpO

2 and for the pulse rate (PR). In the example above, the low alarm limit for

SpO

2 is 30% and the high alarm limit is 100%. Pulse rate alarm limits are: low

100 bpm, and high 180 bpm.

Column Headings

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status

Actual column headings are in the second row of the column heading line. Patient data presented in the chart is, from left to right: the time that the chart was printed, the current %SpO

2 value being measured, current pulse rate in beats

per minute (bpm), current pulse amplitude (PA), and the operating status of the NPB-190.

A-3

Appendix

A4.2 Patient Data and Operating Status

Time Tag

Time Tag %SpO2 PR (bpm) PA Status 123456789 100 120 220

Time Tag does not represent a real-time clock. The number beneath the Time Tag heading represents time, in seconds, since the unit was initialized at the factory. This number will increase in size throughout the life of the monitor.

Patient Data

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status 123456795 100 190* 220 PH

Patient data are highlighted in the display above. Parameter values are displayed directly beneath the heading for each parameter. In this example, the %SpO 100, and the pulse rate PR is 190 beats per minute. The “*” next to the 190 indicates that 190 beats per minute is outside of the alarm limits, indicated in the top row, for pulse rate. If no data for a parameter is available three dashes (- - -) will be displayed in the printout.

2 is

PA is an indication of pulse amplitude. The number can range from 0 to 254 and will typically range around 45. There are no alarm parameters for this value. It can be used for trending information. It is an indication of a change in pulse volume, pulse strength, or circulation.

NPB-190 Version 1.0.0 CRC XXXX SpO2 Limit: 30-100% PR Limit: 100-180 bpm Time Tag %SpO2 PR (bpm) PA Status 123456795 100 190* 220 PH

The Status column indicates alarm conditions and operating status of the NPB-

190. A Pulse High alarm is indicated by the PH in this example. The status

column can have as many as four codes displayed in one line of data. A complete listing of the status codes is listed in Table A-2.

Table A-2: Status Codes

Code Meaning

LB AS AO SD PS LP SH SL PH PL

Low Battery Alarm Silence Alarm Off Sensor Disconnect Pulse Search Loss of Pulse Sat High Limit Alarm Sat Low Limit Alarm Pulse rate High Limit Alarm Pulse rate Low Limit Alarm

A-4

Note: A Sensor Disconnect will also cause three dashes (- - -) to be displayed

in the patient data section of the printout.

A5 NURSE CALL

Appendix

A Nurse Call signal can be obtained by connecting to the serial port. This function is only available when the instrument is operating on AC power. Nurse Call will be disabled when the unit is operating on battery power, or if the audible alarm is turned off or silenced. The remote location will be signaled anytime there is an active audible alarm.

Pin 11 on the serial port is the Nurse Call signal and pin 10 is ground (see Figure A-1). When there is no alarm condition, the voltage between pins 10 and 11 will be -5 to -12 VDC. Whenever there is an active audible alarm condition, the output between pins 10 and 11 will be +5 to +12 VDC.

A-5

TECHNICAL SUPPLEMENT

S1 Introduction S2 Oximetry Overview S3 Circuit Analysis S4 Functional Overview S5 AC Input S6 Power Supply PCB S7 Battery S8 User Interface PCB S9 Front Panel Display PCB and Controls S10 Schematics

S1 INTRODUCTION

This Technical Supplement provides the reader with a discussion of oximetry principles and a more in-depth discussion of NPB-190 circuits. A functional overview and detailed circuit analysis is supported by block and schematic diagrams. The schematic diagrams are located at the end of this supplement.

S2 OXIMETRY OVERVIEW

The NPB-190 is based on the principles of spectrophotometry and optical plethysmography. Optical plethysmography uses light absorption technology to reproduce waveforms produced by pulsatile blood. The changes that occur in the absorption of light due to vascular bed changes are reproduced by the pulse oximeter as plethysmographic waveforms.

Spectrophotometry uses various wavelengths of light to qualitatively measure light absorption through given substances. Many times each second, the NPB190 passes red and infrared light into the sensor site and determines absorption. The measurements that are taken during the arterial pulse reflect absorption by arterial blood, nonpulsatile blood, and tissue. The measurements that are obtained between arterial pulses reflect absorption by nonpulsatile blood and tissue.

By correcting "during pulse" absorption for "between pulse" absorption, the NPB-190 determines red and infrared absorption by pulsatile arterial blood. Because oxyhemoglobin and deoxyhemoglobin differ in red and infrared absorption, this corrected measurement can be used to determine the percent of oxyhemoglobin in arterial blood: SpO2 is the ratio of corrected absorption at each wavelength.

S-1

Technical Supplement

S2.1 Functional Versus Fractional Saturation

The NPB-190 measures functional saturation, that is, oxygenated hemoglobin expressed as a percentage of the hemoglobin that is capable of transporting oxygen. It does not detect significant levels of dyshemoglobins. In contrast, hemoximeters such as the IL482 report fractional saturation, that is, oxygenated hemoglobin expressed as a percentage of all measured hemoglobin, including measured dysfunctional hemoglobins.

Consequently, before comparing NPB-190 measurements with those obtained by an instrument that measures fractional saturation, measurements must be converted as follows:

functional saturation

fractional

saturation

S2.2 Measured Versus Calculated Saturation

When saturation is calculated from a blood gas measurement of the partial pressure of arterial oxygen (PaO NPB-190 SpO

2 measurement. This is because the calculated saturation may not

have been corrected for the effects of variables that can shift the relationship between PaO

2 and saturation.

Figure S2-1 illustrates the effect that variations in pH, temperature, partial pressure of carbon dioxide (PCO hemoglobin may have on the oxyhemoglobin dissociation curve.

100

pH Temperature PCO

2,3-DPG

Fetal Hb

100

100-(% carboxyhemoglobin +%methemoglobin)

2), the calculated value may differ from the

2), and concentrations of 2,3-DPG and fetal

pH Temperature PCO

2,3-DPG

S-2

Saturation (%)

100

PO2 (mmHg)

Figure S-1: Oxyhemoglobin Dissociation Curve

S3 CIRCUIT ANALYSIS

The following paragraphs discuss the operation of each of the printed circuit boards within the NPB-190 pulse oximeter. (Refer to the appropriate schematic diagram at the end of this supplement, as necessary.)

S4 FUNCTIONAL OVERVIEW

The monitor functional block diagram is shown in Figure S4-1. Most of the functions of the NPB-190 are performed on the UIF PCB. Functions on the UIF PCB include the SPO of the NPB-190 are the Power Entry Module (PEM), Power Supply, and the Display PCB.

The Display module consists of the LED display and the Membrane Panel. Contained on the Membrane Panel are enunciators and push buttons, allowing the user to access information and to select various available parameters. The Display PCB contains; SpO driver circuits.

Power Entry Module

Battery

Fuses

Technical Supplement

2 module, PIC, CPU, and Memory. Other key components

2, heart rate, and Blip Bar LEDs, and their associated

Power Supply

Battery ChargerDCSupply

On/Off Switch

Membrane

Panel

LED Display

S5 AC INPUT

Alarm Speaker

Serial port

UIF PCB

PIC

Flash ROM 64K

80196

CPU

SPO2 Module

EEPROM

System RAM

Patient Connection

Figure S-2: NPB-190 Functional Block Diagram

A selector switch on the back of the NPB-190 allows the user to connect the monitor to AC power ranging from 100 VAC to 240 VAC. The switch has two positions, one for 100 VAC through 120 VAC and one for 200 VAC through 240 VAC. Verify that the switch selection matches the AC power at your location before plugging the monitor into an AC outlet.

AC power enters the NPB-190 through the Power Entry Module (PEM). Both the Line and Neutral lines are protected by a 0.5 amp fuse. These user-accessible fuses are located in a fuse drawer, which is part of the PEM located on the back of the monitor.

S-3

Technical Supplement

S6 POWER SUPPLY PCB THEORY OF OPERATION

The NPB-190 uses an unregulated linear power supply. This power supply provides the DC power needed to charge the battery and to power the User InterFace PCB (UIF). Electro Static Discharge (ESD) protection is also provided by the power supply.

AC power from the PEM is passed through a step-down transformer, T2, which has two primary and two secondary windings. If switch SW1 on the back of the monitor is in the 120 VAC position, the primary windings are in parallel. The primary windings are in series if SW1 is in the 240 VAC position.

Each secondary winding is fused with a 2.0 amp fuse (F1 and F2). If a short circuit should occur in the DC circuitry, these fuses prevent the transformer from overheating. The output of the transformer varies, depending on load and input. Voltage measured between the outlet of a secondary winding and ground can be from 6 to 20 VAC. High frequency noise from the AC line and from the UIF PCB is filtered by C6 and C8 before passing through the bridge rectifier.

The bridge rectifier provides the DC power used in the NPB-190. The positive output is the Main_DC ranging from 7 to 18 VDC. This positive voltage is used for the battery circuit and to power the UIF PCB.

S6.1 Battery Circuits

Two circuits are included in this section of the Power Supply PCB. One circuit is used to charge the battery, and the other circuit provides battery protection.

Charging Circuit

The Power Supply will charge the battery any time the NPB-190 is connected to AC power even if the monitor is not turned on. The voltage applied to the battery is 6.8 ± 0.15 VDC and is current limited to 400 ± 80 mA.

Battery Protection

Two types of battery protection are provided by the Power Supply; protection for the battery and protection from the battery.

SW2 is a resettable component that protects the battery. SW2 opens and turns the charging circuit off if the temperature of the battery rises above 50∞ C. If the output of the battery exceeds 2.5 amps, F3 opens. F3 protects the battery from a short to ground of the battery output. F3 cannot be reset.

Protection from the battery is provided in case the battery is connected backwards. Should this happen, the output of the battery is shorted to ground through CR3. This provides protection for other circuits in the monitor.

S-4

S7 BATTERY

A lead-acid battery is used in the NPB-190. It is rated at 6 VDC 4 amphours. When new and fully charged, the battery will operate the monitor for 12 hours. A new battery will last 15 minutes from the time the low battery alarm is declared until the unit is shut down due to battery depletion.

The battery can withstand 400 charge/discharge cycles. Recharging the battery to full capacity takes 14 hours.

Change over from AC to battery power will not interrupt the normal monitoring operation of the NPB-190. When the unit is running on battery power, the serial port will be turned off along with the Nurse Call.

S8 USER INTERFACE PCB (UIF)

The UIF PCB is the heart of the NPB-190. All functions except the unregulated DC power supply, display, and keypad reside on the UIF PCB. The following text covers the key circuits of the UIF PCB.

S8.1 Regulated DC Power Supply

Technical Supplement

The UIF PCB receives the Main_DC unregulated voltage of 7 to 18 VDC from the Power Supply, or 5.8 to 6.5 VDC from the internal battery. The Power Supply on the UIF PCB generates +10.0, -5.0 and +5.0 VDC.

S8.2 Controlling Hardware

Two microprocessors reside on the UIF PCB. The CPU is an Intel 80C196KC (196) running at 10MHz. The second microprocessor is referred to as the PIC and is controlled by the CPU.

CPU

The 196 is the main controller of the NPB-190. The 196 controls the front panel display, data storage, and the SpO controlled by the 196 with the exception of the Nurse Call. The user interface is controlled by the CPU with the exception of the power button.

The SpO built into the processor. PWM signals are sent to control the intensity of the LEDs in the sensor and to control the gain of the amplifiers receiving the return signals from the photodetector in the sensor.

Analog signals are received from the SpO function in the 196 converts these signals to digital values for %SpO rate. The values are then displayed and stored.

2 function. Serial port communication is

2 function is controlled by a pulse width modulator (PWM) function

2 circuit on the UIF PCB. An A/D

2 and heart

User’s interface includes the front panel display and the keypad. By pressing any of five keys on the keypad the operator can access different functions of the NPB-190 (the power switch is not controlled by the 196). The 196 will recognize the keystroke and make the appropriate change to the monitor display to be viewed by the operator. Any changes made by the operator are used by the

S-5

Technical Supplement

monitor until it is turned off. Default values will be restored when the unit is power-on again.

Patient data is stored by the NPB-190 and can be downloaded to a printer through the serial port provided on the back of the monitor. An in-depth discussion of the serial port is covered in the Appendix of this manual.

PIC

Primary responsibilities of the PIC include monitoring and controlling the NPB190ís power, and generating sounds.

Since the PIC monitors and controls system power, the Power On/Standby switch is interfaced with the PIC. When the Power On/Standby switch is pressed, the PIC sends power to the circuits within the NPB-190. The PIC will determine if the unit is running on AC, or battery power, and illuminate the proper indicator. The serial port and nurse call functions are disabled by the PIC if the unit is running on battery power.

Battery voltage is checked periodically by the processor. A signal from the processor turns the charging circuit off to allow this measurement to be taken. If the processor determines that the battery voltage is below 5.85 ± 0.1 VDC, a low battery alarm is declared by the PIC. If battery voltage on the UIF PCB is measured below 5.67 ± 0.1 DCV, the monitor will display an error code and sound an audible alarm. (Voltages measured at the battery will be slightly higher than the values listed above). The user will be unable to begin monitoring a patient if the battery voltage remains below this point. If either event occurs, plug the unit into an AC source for 14 hours to allow the battery to fully recharge.

When the NPB-190 is powered by AC, the nurse call function is available. If no alarm conditions exist, the output will be -5 to -12 VDC. Should an alarm condition occur, the output will be +5 to +12 VDC.

When the CPU sends a tone request, three items are used to determine the tone that is sent by the PIC to the speaker. First, pulse tones change with the %SpO value being measured. The pulse beep tone will rise and fall with the measured %SpO

2 value. Second, three levels of alarms, each with its own tone, can occur,

High, Medium, and Low priority. Third, the volume of the alarm is user adjustable. Alarm volume can be adjusted from level 1 to level 10, with level 10 being the highest volume.

A time clock is provided by the NPB-190. The PIC is powered at all times to support this function. To conserve power, the PIC enters a low-power sleep mode when the instrument is powered down.

S8.3 Sensor Output/LED Control

The SpO2 analog circuitry provides control of the red and IR LEDs such that the received signals are within the dynamic range of the input amplifier. Because excessive current to the LEDs will induce changes in their spectral output, it is sometimes necessary to increase the received signal channel gain. To that point, the CPU controls both the current to the LEDs and the amplification in the signal channel.

S-6

At initialization of transmission, the LED’s intensity level is based on previous running conditions, and the transmission intensity is adjusted until the received signals match the range of the A/D converter. If the LEDs reach maximum output without the necessary signal strength, the PWMs will increase the channel gain. The PWM lines will select either a change in the LED current or signal gain, but will not do both simultaneously.

The LED drive circuit switches between red and IR transmission and disables both for a time between transmissions in order to provide a no-transmission reference. To prevent excessive heat build-up and prolong battery life, each LED is on for only a small portion of the duty cycle. Also, the frequency of switching is well above that of motion artifact and not a harmonic of known AC transmissions. The LED switching frequency is 1.485 kHz. The IR transmission alone, and the red transmission alone, will each be on for about one-fifth of the duty cycle; this cycle is controlled by the CPU.

S8.4 Input Conditioning

Input to the SpO2 analog circuit is the current output of the sensor photodiode. In order to condition the signal current, it is necessary to convert the current to voltage.

Technical Supplement

Because the IR and red signals are absorbed differently by body tissue, their received signal intensities are at different levels. Therefore, the IR and red signals must be demodulated and then amplified separately in order to compare them to each other. Demultiplexing is accomplished by means of two circuits that alternately select the IR and red signal. Selection of the circuits is controlled by two switches that are coordinated with the IR and red transmissions. A filter with a large time constant follows to smooth the signal and remove noise before amplification.

S8.5 Signal Gain

The separated IR and red signals are amplified so that their DC values are within the range of the A/D converter. Because the received IR and red signals are typically at different current levels, the signal gain circuits provide independent amplification for each signal as needed. The gain in these circuits is adjusted by means of the PWM lines from the CPU.

After the IR and red signals are amplified, they are filtered to improve the signal-to-noise ratio and clamped to a reference voltage to prevent the combined AC and DC signal from exceeding an acceptable input voltage from the A/D converter.

S8.6 Variable Gain Circuits

The two variable gain circuits are functionally equivalent. The gain of each circuit is contingent upon the signal’s received level and is controlled to bring each signal to approximately 3.5 V. Each circuit uses an amplifier and one switch in the triple SPDT analog multiplexing unit.

S-7

Technical Supplement

S8.7 AC Ranging

In order to achieve a specified level of oxygen saturation measurement and to still use a standard type combined CPU and A/D converter, the DC offset is subtracted from each signal. The DC offsets are subtracted by using an analog switch to set the mean signal value to the mean of the range of the A/D converter whenever necessary. The AC modulation is then superimposed upon that DC level. This is also known as AC ranging.

Each AC signal is subsequently amplified such that its peak-to-peak values span one-fifth of the range of the A/D converter. The amplified AC signals are then filtered to remove the residual effects of the PWM modulations and, finally, are input to the CPU. The combined AC and DC signals for both IR and red signals are separately input to the A/D converter.

S9 FRONT PANEL DISPLAY PCB AND CONTROLS

S9.1 Display PCB

Visual patient data and monitor status is provided by the Front Panel Display PCB. At power up, all indicators are illuminated to allow verification of their proper operation.

There are two sets of three 7-segment displays. One set displays %SpO other displays pulse rate. A decimal point immediately to the right of either display indicates that an alarm limit for that parameter is no longer set at the power on default value.

In between the two 7-segment displays is a 10-segment blip bar. The blip bar illuminates with each pulse beat. The number of segments illuminated indicate the relative signal strength of the pulse beat. A tone will accompany each pulse beat. The sound of the tone will change pitch with the %SpO measured.

Four LEDs and icons are also located on the Front Panel Display PCB. An LED illuminated next to an icon indicates a function that is active. Functions indicated by the LEDs are AC/Battery Charging, Low Battery, Alarm Silence active, and Pulse Search.

S9.2 Membrane Keypad

A membrane keypad is mounted as part of the top case. A ribbon cable from the keypad passes through the top case and connects to the UIF PCB. Six keys allow the operator to access different functions of the NPB-190.

These keys allow the user to select and adjust the alarm limits, cycle power to the unit, and to silence the alarm. Alarm volume and alarm silence duration can also be adjusted via the keypad. A number of other functions can be accessed by pressing the Upper and Lower Alarm Limit buttons simultaneously and then selecting the desired option with the Adjust Up or Adjust Down button. These functions are discussed in greater detail in Section 4.

2 and the

2 level being

S-8

S10 SCHEMATIC DIAGRAMS

The following schematics are included in this section:

Figure Description

S-3 Front End Red/IR Schematic Diagram

S-4 Front End LED Drive Schematic Diagram

S-5 Front End Output Schematic Diagram

S-6 Front End Power Supply Schematic Diagram

S-7 Isolation Barrier EIA-232 Port Schematic Diagram

S-8 CPU Core Schematic Diagram

S-9 PIC and Speaker Schematic Diagram

S-10 Indicator Drive Schematic Diagram

S-11 Core Power Supply Schematic Diagram

Technical Supplement

S-12 Parts Locator Diagram for UIF PCB

S-13 Display PCB Schematic Diagram

S-14 Parts Locator Diagram for Display PCB

S-15 Power Supply Schematic Diagram

S-16 Parts Locator Diagram for Power Supply PCB

S-9

AD822 BYPASS

+10V

-5V

VREF

2.00K

1.00M

DG201S BYPASS

+10V

-5V

C19

0.01U

C21

0.01U

51.1K

C56 22U 20V

7343

VREF

C23 1000P

2N3906S

R11

3.32K

0.47U 25V

3216

C13

1000P

2N3906S

3.32K

0.47U 25V

3216

VREF

1.00K R109

1.00K

+10V

-5V

R77

+10V

I25

-5V

I26

VREF

C24 220P

U4 AD822

VREF

U7 LF441S

15874

C22

0.01U

VREF

TP9

C15 220P

I171 I22

TP2

I173 I172

RED CHANNEL

C25

0.12U

R12

100K

R13

I21

100K

0.068U

C26

IR CHANNEL

C14

0.12U

100K

C16

0.068U

I14

I13

IRLED/AV

I16

I15

TP10

+10V

CR3

1 313

1N914S

214

CR2

1 331

1N914S

TP4

+10V

489

U10

LF444CM

-5V

U10 LF444CM

-5V

I19

I20

100K

R14

I23

VREF

C27

0.12U

CR4

1N914S

R17

100K

I24

C17

0.12U

CR1

1N914S

100K

0.068U

VREF

0.068U

TP11

1331

C28

TP3

13 13

C18

+10V

13144

-5V

+10V

-5V

U10 LF444CM

476

U10 LF444CM

PWM2

G_PWM2 G_MUX1

G_REDDC

G_IRDC

SAMPIR SAMPRED G_LEDDR OFF/ON

VREF

74HC00S

0.1U Z5U

I17

VREF

I18

VREF

I12

I11

74HC00S

VCC

VCC16INH

C20

0.01U

-5V

R15

+10V

82.5K

U12

DG201S

V+

V-GND 4

-5V

U12

DG201S

V+

V-GND 4

-5V

U4 AD822

TP8

TP5

88.7K_0.1%

+10V

V+

+10V

-5V

V-GND

R10

U12

DG201S

R16

82.5K

I10

VEE

VSS

CD4053S

TP6

TP7

6 11

VCC

FRONT END RED/IR

035191

Figure S-3

Front End Red/IR Schematic Diagram (1 of 10)

S-11

CON_DB9F

+10V

VREF

C36

390P

I27

3.32K

5 9

9 4

4 8

8 3

3 7

7 2

2 6

6 11

I28

3.32K

R21

I32

R25

182K

R28

U5 AD822

AD822

578

C30 100P

-5V

R29

1.00M

+10V

VREF

+10V

U12

DG201S

V+

18PC34

R27

I33

318

I34

-5V

C31 100P

280K

RSENS

C32 100P

C37

0.047U

R37

511K

C35

V-GND 4

-5V

VREF

I30

I31

IR/RED

VCC

0.1U Z5U

Q10

MPSA56S

R22

10.0K

MPSA06S

313

I35

MPSA56S

MPSA06S

R35

10.0K I37

R44

2.74K

VCC VCC

R20

10.0K

I36

R18

2.74K

I39

I38

I40

I43 I44

VCC

C33

0.01U

616

INH

CD4053S

I42

VCC

VEE

VSS

I45

LED DRIVE

U11

LT1013S

I51

I46

I47

C29

C38 22P

14.7P

R19

10.0K

313

Q8 2N3906S

R40

100K

0.022U

0.1U

C40

C39

R23 182K

R39

20.0K

TP18

R42

100K

C42

0.022U

0.1U

I48

C41

R43 182K

R41

20.0K

G_LEDDR

IR/RED

G_PWM2

G_PWM1

TP19

035191

6.04K_0.1%

0.1U Z5U

R30

R36

22.1K

R33

VREF

10.0

R32

10.0K

TP17

R34

10.0K

2N3904S

TP12

R24

100K

R26

100K

I50

3 13

CR5 1N914S

331

1N914SCR6

15.8K

R38

TP14

VREF

R31

40.2K

OFF/ON

LEDDIS

I49

VCC

I52

U11

LT1013S

PHOTOI

RSENS

FRONT END LED DRIVE

Figure S-4

Front End LED Drive Schematic Diagram (2 of 10)

S-13

G_REDDC

G_IRDC

Guard Ring

DG201S

U13

DG201S

U13

0.015U

CK06

0.015U

CK06

+10V

V+

V-GND 4

-5V

Guard Ring

+10V

V+

V-GND 4

-5V

I56 I55

I57

ZERO-L

R51

3.32K

VREF

R55

12.1K

TP20

R56

15.0K

R61

3.32K

VREF

R57

12.1K

TP21

R48

15.0K

U9 LMC6044S

C6GUARD

U9 LMC6044S

C5GUARD

C55

0.01U

3114

C51

0.01U

+5.7V

R45 100K

C46 1000P

R54

34.8K

R46 100K

C47 1000P

R58

34.8K

R49

3.32K

U3 INH

A B C

XO X1

Y0 Y1

Z0 Z1

REDLED/AV

U6 74HC00S

C43

0.1U

CD4053S

0.1U

0.01U

VCC

VEE

VSS

C50

VREF

VCC

C52

VCC

0.47U

3216

25V

0.47U

3216

6 11 10

12 13

25V

U6 74HC00S

I60

C45

0.01U

C44

0.01U

C49

0.01U

C48

0.01U

I58

I59

I61

I62

I64

I65

I68

I67

R53

3.32K

I54

R52

100K

R50

3.32K

I70

I63

R47

3.32K

I96

R59

3.32K

I69

R62

100K

R60

3.32K

I71

REDDC

REDAC

PWM0 REDLED/AV

I72

IRDC

IRAC

PWM1

DG201S SPARESDG201S BYPASS

VCCVCC+10V

U13

DG201S

U13

VCC +10V

V+

V- GND

-5V-5V

+10V

VCC

V+

C54

0.01U

C57

C53

0.01U

-5V

22U

20V

7343

V- GND

DG201S

035191

G_MUX1

G_PWM1

Figure S-5

Front End Output Schematic Diagram (3 of 10)

S-15

I84

1331

CR10 1N914S

I29

C60 10U 16V

1000P

C62

VDD

7343

C63 47U 10V

HIGH

CURRENT

R66

36.5K

49.9

C61 330P

R64

I76

VCC

I75

VSW

VFB

I85

TP15

LT1373S

VSW

VIN

NFB

U14

R63

11.5K

C11

0.1U Z5U

I73

R65

4.99K

S/S

GNDS

GND

C10

0.1U Z5U

LPE-4841

I41

CR8

MBRS130

12 12

I78

1221

CR9

I77

CR7

221

RAW+10V

C66

22U

TP28

20V

7343

C65 47U 10V

VCC

C64 47U 10V

7343

RAW-5V

R68 182

49.9

7343

R67

0.1U

R71

0.1U

C67 22U 20V

C59

C58

Z5U

I79

I80

TP22

TP23

7343

C70 22U

C69 22U

20V

VIN

+10V

20V

-5V

I81

8 1

VIN

GND1 GND2

78L05D

I82

VOUT

GND3 GND4

Q4 2N3904S

2 3

R70

10.0K

2N3904S

TP16

VREF

6 7

+5.7V

0.1U

C12

Z5U

VREF

R69

1.0

I83

C68 22U

20V

7343

035191

Figure S-6

Front End Power Supply Schematic Diagram (4 of 10)

S-17

I97 I98

TXD NURSE-CALL

I99

RXD

I88

TP26

EXCOM-SHTDWN

I192

VDD

L21 600R

I237

U19

PWR

T1IN

T2IN

R1OUT

R2OUT

SHDN

MAX250S

R72

10.0K

C89

3300P

50V

high power

clocks

R74

4.02K

U18 6N136

U16 4N26

0.1U

C76

Z5U

DTR TX

RXDLDR

I86

C74

4.7U 35V

CR12

1N914

U15

T1DIN

T2DIN

R1LDR

R2LDR

BYP

ISO_GND

MAX251S

VPLUS

CR11

SMCJ22C

C72

1.0U 20V

TP29

13 31

TP31

V+

V-

RTRI

R2IN R1IN

T2OUT T1OUT

I87

96 10

11 12

IGND TP24

C73

1.0U

20V

VPLUS

VMINUS

RXD232

TXDOUT

NCALOUT

22V

2121

VMINUS

313

CR16 BAV99

CR13 BAV99

CR14 BAV99

IGND

CR15

BAV99

1 9

9 2

CON_DB15F

1717

CLKDRV1

L22 600R

CLKDRV2

C75

C71

2200P

1.0U 50V

20V

T1LDR T2LDR

R1DIN R2DIN

GND

3 6

10 11

TXDLDR DTRLDR

RXDIN

L23 600R

SCHOTT 67129080

C117 3300P

50V

I238

035191

ISOLATION BARRIER

EIA-232 Port

VDD

R73

4.02K

R76 100M 1/4W TH

U17

6N136

3553

DT1 600V TH

SH1 BD MTG HOLE

Figure S-7

Isolation Barrier EIA-232 Port Schematic Diagram (5 of 10)

S-19

VDD

I221

VDD

Bypass cap

for U30

VDD

R117 2.21K

U30

PBRST

TOL

GND

LTC1232

U41 74HC08S

U28 74HC08S

U34

74HC02S

L7 0.95U

L10 0.95U

L12 0.95U

SPI_MISO PICINT

I176

CON_7X2

VCC

~RST

RST

C91

0.1U

LEDDIS

IR/RED

RWD_RST

PWM1

PWM2

IICDATA

PORTSEL-L

RWD_RST

I110

I91

I112 I111

LEDEN

RST-L

IICDATA

RST-L

DISPLAY CONNECTOR

TP32

VDD

4700P

3 44

I102 I104 I106 I101

TP34

I92

TXD

PWM0

U41 74HC08S

Q11 SI99532

U41

74HC08S

DISP_DATA

IIC_SCK

I226 I227 I228 I229

C79

470P

I107I105I103

RST-L

L15 0.95U

I108 I109

0.95UL14

SPARES

I66

I239

Q11 SI99534

VDD

C118

0.1U

196PWR

50V

C102 47U 10V

7343

VREF

REDDC REDAC IRDC IRAC RSENS BTN_1 BTN_2 BTN_3

IRLED/AV

RAMEN-L SPI_SCK PHOTOI SPI_MISO

RXD PICINT BTN_4 BTN_5

REDLED/AV ZERO-L

C82

0.1U

I100

37 13

13 12

6 5

5 7

7 4

11 10

8 9

19 20

20 21

21 22

22 23

23 30

30 31

31 32

43 16

3 2

64 24

24 25

18 17

17 15

15 44

44 42

42 39

39 33

33 38

U27

PWR

VPP VREF ANGND

ACH0/P0.0 ACH1/P0.1 ACH2/P0.2 ACH3/P0.3 ACH4/P0.4 ACH5/P0.5 ACH6/P0.6 ACH7/P0.7

P1.0 P1.1 P1.2 P1.3/PWM1 P1.4/PWM2 P1.5/ P1.6/ P1.7/

READY RESET NMI EA BUSWIDTH HSI0 HSI1

P2.0/TXD P2.1/RXD P2.2/EXTINT P2.3/T2CLK P2.4/T2RST P2.5/PWM0 P2.6/TWUP-DN P2.7/T2CAPT

80C196KC

BREQ HLDA HOLD

ALE/

WRL/WR

WRH/BHE

HSI2/HSO4 HSI3/HSO5

CLKOUT

XTAL1 XTAL2

ADDRESS DECODING - MEMORY MAPPING

VDD

I231

VDD

1 2

4 5

TP27

U25

74HC20S

U34

74HC02S

R131

10.0K

C78

0.1U

VDD

TP25

R101

10.0K

C81

0.1U

PORTSEL-L

WR-L

ADDR12 ADDR13

ADDR14 ADDR15

I177

U34

74HC02S U25

74HC20S

VDD

I166

C94

0.1U

12 13

U28

74HC08S

RAD0

RAD1

RAD2

RAD3

RAD4

RAD5

RAD6

RAD7

RAD8

RAD9

RAD10

RAD11

RAD12

RAD13

RAD14

RAD15

RALE-L

RRD-L

RWR-L

41 63

28 29

29 34

34 35

35 26

26 27

CLK_OUT

67 66

14 36

36 68

EXTERNAL OUTPUT PORT 0000 - EFFF

EXOUTEN-L

I178

RAM - F000 - FFFF

RAMEN-L

I179

ROM - 0000 - EFFF

I224

U28

74HC08S

AD10 AD11 AD12 AD13 AD14 AD15

INST

HSO0 HSO1 HSO2 HSO3

GND1 GND2 GND3

AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9

ADV

I167

RP2 120

10 11

11 12

12 13

13 14

14 15

15 16

10 11

11 12

12 13

13 14

14 15

15 16

120

I74 I89

R111

R88 121

I234

I233

R110

121

ROMEN-L

TP33

RP1

I230

7 6 5 4 3 2 1 8

7 6 5 4 3 2 1

221

10MHZ 1

HC49S

10MHZ

ATP-SM

C95

22P

SPI_MOSI

AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15

I164

I93

IIC_SCK

1441

R75 121

I163

R86 121

R87 121

I161

I162

I90

HC49S IS USED ONLY IF ATP-SM IS NOT AVAILABLE

C90

22P

I113 I114 I115 I116 I117 I118 I120 I119 I121 I122 I124 I123 I128 I127 I125 I126

L16 0.95U

0.95UL17

0.95UL18

ALE

RD-L

WR-L

OFF/ON

RAD0 RAD1 RAD2 RAD3 RAD4 RAD5 RAD6 RAD7 RAD8 RAD9 RAD10 RAD11 RAD12 RAD13 RAD14 RAD15

SAMPRED

SAMPIR

AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15

ALE

TP36

EXTERNAL OUTPUT PORT

AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7

EXOUTEN-L

TP35

I130 I131 I133 I132 I137 I136 I134 I135 I144 I143 I141 I142 I138 I139 I140 I129

AD0 AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15

10.0K

R92

10.0K

R78

3 4 5 6

6 7

7 8

8 9

3 4 5 6

6 7

7 8

8 9

U21

74HC573S

U20

U29

2 3

3 4

4 5

5 6

6 7

7 8

8 9

74HC574S

I159 I158 I156 I157 I152 I153 I155 I154 I145 I146 I148 I147 I151 I150 I149 I160

2D 3D 4D 5D 6D 7D 8D

C OC

2D 3D 4D 5D 6D 7D 8D

C OC

74HC573S

1D 2D 3D 4D 5D 6D 7D 8D

CLK

1Q 2Q 3Q 4Q 5Q 6Q 7Q 8Q

1921D2 183 174 165 15 14 13 12

19 18

18 17

17 16

16 15

15 14

14 13

13 12

ADDR0 ADDR1 ADDR2 ADDR3 ADDR4 ADDR5 ADDR6 ADDR7 ADDR8 ADDR9 ADDR10 ADDR11 ADDR12 ADDR13 ADDR14 ADDR15

ADDR0AD0 ADDR1AD1 ADDR2AD2 ADDR3AD3 ADDR4AD4 ADDR5AD5 ADDR6AD6 ADDR7AD7

VDD

ADDR8 ADDR9 ADDR10 ADDR11 ADDR12 ADDR13 ADDR14 ADDR15

PICEN_L LEDEN EEPEN

AL_SIL_IND PSRCH_IND BATT_IND

VDD

C116 47U 10V 7343

C83

0.1U

I181 I242 I182

I183 I184 I185

I168 I169 I170 I174 I175

VDD

C80

0.1U

ALE RD-L WR-L SPI_MOSI SPI_SCK

CPU CORE

C77

0.1U

ADDRESS LATCHING

0.95UL8

0.95UL9

0.95UL11

0.95UL13

WD_RST

R89 221

I53

2 4

43 6

65 87

8 10

10 12

1211 1413

035191

Figure S-8

CPU Core Schematic Diagram (Sheet 6 of 10)

S-21

PICPWR

FREQ

PWM_VOL

C92

0.1U

PICPWR

9.83MHZ 12

HC49S

9.83MHZ 1 44

ATP-SM

C98

22P

6.49K

VDD

RP3

1 2 3 4 5

10K

BATT_CHECK

PWR_CTRL

LOW_BATT-L

CRIT_BATT-L

100

NURSE-CALL

C110

47U 10V 7343

GND1

GND2

U34

74HC02S

7 6

PWRIND-L

PWR_BTN

AC_OK-L

PWM_VOL

SPI_SCK SPI_MOSI SPI_MISO

VO1 VO2

PICPWR

FREQ

C100 C97

33P

VDD

I94

R96

10.0K

C121

47U 10V 7343

WR-L

11 2

C88

0.1U

CON_2R

IIC_SCK

EEPEN

C120 47U 10V 7343

5 8

32.768KHZ

ECPSM29T

I197

I204

Z5U

1441

VDD

I201

33P

UPPER MEMORY - 2000 - 3FFF

IICDATA

LOWER MEMORY - 0000 - 1FFF

IICDATA

U40

TC7S32F

I198

U28

U23 8KX8

SCL

SDA

AT24C64S

U24 8KX8

SCL

SDA

AT24C64S

I165

FLASHWR-L

74HC08S

PWR

GND

PWR

GND

VDD

U32

A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14

WE OE CE

55257S

U31

A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15

WE CE OE

32KX8

64KX16

FLASH

PWR

GND

O0 O1 O2 O3 O4 O5 O6 O7

PWR

D10 D11 D12 D13 D14 D15

GND1 GND2

SRAMPWR

AD0

AD1

AD2

AD3

AD4

AD5

AD6

AD7

FLASHPWR

D0 D1 D2 D3 D4 D5 D6 D7 D8 D9

AD0

AD1

20 19

AD2

19 18

AD3

18 17

AD4

17 16

AD5

16 15

AD6

15 14

AD7

14 11

AD8

11 10

AD9

10 9

AD10

9 8

AD11

8 7

AD12

7 6

AD13

6 5

AD14

5 4

AD15

12 34

ADDR0 ADDR1 ADDR2 ADDR3 ADDR4 ADDR5 ADDR6 ADDR7 ADDR8 ADDR9 ADDR10

TP37

R79

10.0K

VDD

C87

0.1U

VDD

C84

0.1U

10.0K

I193

R91

ADDR11 ADDR12 ADDR13

WR-L RD-L RAMEN-L

ADDR1 ADDR2 ADDR3 ADDR4 ADDR5 ADDR6 ADDR7 ADDR8 ADDR9 ADDR10 ADDR11 ADDR12 ADDR13 ADDR14 ADDR15

FLASHWR-L

RD-L

I225

R130

ROMEN-L

9 8

8 7

7 6

6 5

5 4

4 3

25 24

24 21

21 23

27 22 20

20 14

24 25

25 26

26 27

27 28

28 29

29 30

30 31

31 32

32 35

35 36

36 37

37 38

38 39

39 40

40 41

221

I202

C103

47U 10V 7343

27 22

I203

L20 0.95U

C86

0.1U

C85

0.1U

11 12 13 15 16 17 18 19

VDD

L19 0.95U

7343

C104 47U 10V

21 22

22 23

23 24

24 25

25 26

26 27

27 28

11 12

12 13

13 14

14 15

15 16

16 17

17 18

R133

1.00K

PWR_STATUS

I190

I191

VDD

R104

I194

I196

I195

C105

47U 10V 7343

U26

VCC

VI2

VI4

N.C.

TDA7052A

SPEAKER DRIVER

PORTSEL-L

I189

C101 47U 10V

7343

R99

R100

10.0K

1.0U

PICINT RST-L EXCOM-SHTDWN

PICEN_L

R95 100

PICPWR

I187

R81 332

C96

20V

I199

I200

22P

C99

R93

4.99K

R98

150K

R80

10.0K

C93

0.1U

VDD

578

I235

R102 100K

U22 N190PIC

RA0

RA1

RA2

RA3

RA4

RA5

OSC1

OSC2

I186

VDD

MCLR

VSS1

VSS2

PIC16C62

PICPWR

CR20

1N914S

1 313

I188

U39

I95

TLC27L2

VDD

U39

TLC27L2

318

R132

1.00K

I236

RB0 RB1 RB2 RB3 RB4 RB5 RB6 RB7

RC0 RC1 RC2 RC3 RC4 RC5 RC6 RC7

035191

Figure S-9

PIC and Speaker Schematic Diagram (Sheet 7 of 10)

S-23

I205

PWRIND-L

ACIND_L

CR19

1N914S

CR21

1N914S

4.75K

R129

10.0K

R94

I206

AC LED DRIVE CIRCUIT

R82

AL_SIL_IND

4.75K

I209

ALARM SILENCE INDICATOR DRIVE CKT

R83

PSRCH_IND

4.75K

I211

VDD

PICPWR

2N3906S Q15

I207

R97 249

RPWR_IND

2N3906S Q12

I208

R103 249

RAL_SIL_IND

2N3906S Q13

I210

R105 249

VDD

PICPWR

10.0K

R85

PWR_BTN RPWR_IND RBATT_IND BTN_4 BTN_1

RPSRCH_IND BTN_2 BTN_5 BTN_3 RAL_SIL_IND

R90

10.0K

MEMBRANE PANEL CONNECTOR

876

123

VDDVREF

RP4 10K

1 2

2 3

3 4

4 5

5 6

6 7

7 8

8 9

10 11

11 12

12 13

CON_FLEX13

035191

PULSE SEARCH IND DRIVE CKT

R84

BATT_IND

4.75K

I213

BATTERY IND DRIVE CKT

VDD

RPSRCH_IND

2N3906S Q14

I212

R106 249

RBATT_IND

Figure S-10

Indicator Drive Schematic Diagram (Sheet 8 of 10)

S-25

4 3 2

CON_4L_156

To Linear Power Supply

MAIN_OUT

BATT_CHECK BATT

R125 100K

I216

I217

VDD

R119 249K

C114

0.1U

CR26

1 3

1N914S

R123 100K

568

1331

CR24 1N914S

10.0M

R116

U35 LM393S

C119

0.1U

R114 127K

R112

20.0K

PICPWR

R140

10.0K

MAIN_OUT

R139 100K

AC_OK

I240

I215

I180

TP46

R135 100K

R115

10.0M

R138 100K

TP13

CR17

1221

MBRS330T3

VDD

U35

LM393S

823

I241

PICPWR

I232

I214

1 2N7002S1

VDD

R134

10.0K

AC_OK-L

R137 100K

ACIND_L

Q17

MAIN_DC1

Sh 8

Sh 9

R126 332K

Q16

U33 MIC5200-5

GND1

C109

1U 35V

SI9953

Q16

I222

SI9953

C113

0.1U

OUT

GND2

Requires Heatsink NPB #891196

PICPWR

TP1

C108

10U 16V

CR18

1N914S

U36

TH 25

13 13

LM2940H

OUT HSG12CS

VC1206

C111

0.1U

CR22

5.6V

1 221

PICPWR

C112

0.1U

VDD

TP38

GND

TP39

VDD

C107 470U 16V TH

R128

4.99K

VDD

TP47

U37 LT1009S

I218

V_REF

C106

I223

2N3904S

0.22U 50V

CR23

BATT

R107 200K

CR25

3 11

C115

1.0U 20V

I220

BAT54

Critical at approx 5.68V

R108

6.81K

Low at approx 5.85V

R122

150K

R113

10.0M

VDD

568

R136

10.0M

U38 LM393S

823

U38 LM393S

Normally HIGH, active LOW

VDD

R124

4.99K

Normally HIGH, active LOW

VDD

R118

4.99K

TP42

TP43

CRIT_BATT-L

LOW_BATT-L

12 12

MBRS330T3

Q18

R127 100

LOW to enable VDD output

I219

R120

R121

10.0K

49.9K PWR_CTRL

HIGH to turn ON

035191

Figure S-11

Core Power Supply Schematic Diagram (9 of 10)

S-27

NELLCOR PURITAN BENNETT NPB-190 MAIN BOTTOM SIDE

NELLCOR PURITAN BENNETT NPB-190 MAIN TOP SIDE FAB 035190 REV A

035192

TOP SIDE BOTTOM SIDE

Figure S-12

Parts Locator Diagram for UIF PCB (10 of 10)

S-29

VDD

C3 1000P TH

GND TP1

TP2

VDD

CON_7X2R235

VDD

C2 47U 10V TH

IICDATA

43 6

LEDEN

8 10

IIC_SCK

1211

1211 1413

1413

0.1U TH

33.2K

9 4

PWR

ISET

DIN

LOAD

CLOCK

GND1 GND2

MAX7219

DIG0 DIG1 DIG2 DIG3 DIG4 DIG5 DIG6 DIG7

SEGA SEGB SEGC SEGD SEGE SEGF SEGG

SEGDP

DOUT

DIG1

DIG2

11 6

DIG3

6 7

DIG4

7 3

DIG5

3 10

DIG6

10 5

DIG7

5 8

DIG8

SEGA

14 16

SEGB

16 20

SEGC

SEGD

23 21

SEGE

21 15

SEGF

15 17

SEGG

SEGDP

SEGA SEGB SEGC SEGD SEGE SEGF SEGG SEGDP

DIG1

DS1

10 10

CA1

CA2

NKR141SC TH

DIG2

DS2

10 10

CA1

CA2

NKR141SC TH

A B C D E F G

DS3

10 9

9 8

8 5

5 4

4 2

2 3

3 7

10 10

DIG3

CA1

CA2

NKR141SC TH

DIG4

DS4

10 10

CA1

CA2

NKR141SC TH

DS5

10 10

CA1

CA2

NKR141SC TH

DS6

A B C D E F G DP

CA1 CA2

THNKR141SC

DIG6DIG5

9 8

8 5

5 4

4 2

2 3

3 7

1 6

PULSE RATESpO2

DS7 TH

DIG8

DIG7

SEGDP

SEGG

SEGF

SEGE

SEGD

SEGC

SEGB

SEGA

HDSP-4830

035195

Figure S-13

Display PCB Schematic Diagram (1 of 2)

S-31

NELLCOR PURITAN BENNETT NPB-190 DISPLAY TOP SIDE

035196

Figure S-14

Parts Locator Diagram for Display PCB (2 of 2)

S-33

18GA_BRN

W1 18GA _GRN/YEL

W3 18GA_BLU

Power Entry

MAIN_DC

NEUTRAL

VIN

GND

LM35D

LINE

LINE_IN

AC-

0.01U

AC+

0.01U

BR1 GBU8B

C3 220P 250V TH

29 C1 220P 250V TH

100M

1/4W

DT1

600V TH

E3490A TH

NEUT_IN

4700P 250V

R1 390K 1/2W TH

115V

230V

SW1

32112

EPS2PC3

108

OB24-9

FAC+

FAC-

TH2ASB

2ASB TH

ESD Protection

Battery Charge

R14

10.0K

2N3904

MPSA56

VOUT

R22

R21

73.2K

578

R25

10.0M

LM358

VREF

FAN_CTRL

R11

10.0K

848

R12

10.0K

U2 LM385S

TP1

100K

C11

0.1U

10.0K

R20

10.0K

C10

0.1U

154K

100P

LM358

I12

1N914S

CR6

1.00K

1/4W

R24

49.9

10.0K

R16

HIGH CURRENT VIAS

I10

0.1U

10.0K

R17

10.0K

R15

49.9K

15000U

35V

Q6 2N7002S

I11

1.00K 1/2W

R10

1.50 1/2W

R13

10.0K

CR7

1N914S

BATT_CHK

MAIN_DC

MPSA56

3223

R19

Q2 IRF9510 TH

Requires Heat Sink Nellcor # 891196

CR4

MBRS330T3

CHG_OUT

1.00K

CR5

22V

SMCJ22C

2121

CHG_IN

1221

R23

10.0K

FAN_CTRL

SW2 MTS50B

499

2N3904

BATT_CHK

MAIN_DC

BATT_OUT

THQ1

1331

CR1

1N4702

15V

2121

Main Board

22GA_WHT

22GA_RED

22GA_ORN

22GA_BLK

GND TP2

BATT+

TH2ASB

Fan Control

CR2 22V

SMCJ22C

2112

W4 22GA_RED

W5 22GA_BLK

Battery +

Battery -

TH 35V 100U

2 1

CON_2L

To Fan

035199

Figure S-15

Power Supply Schematic Diagram (1 of 2)

S-35

"+"

"N"

"L"

"GND"

NELLCOR PURITAN BENNETT

NPB-190 LPS TOP SIDE

"-"

035200

Figure S-16

Parts Locator Diagram for Power Supply PCB (2 of 2)

S-37

Nellcor NPB-190 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

SECTION 1: INTRODUCTION

1.1 Manual Overview

1.2 NPB-190 Pulse Oximeter Description

1.3 POWER-ON SELF TEST

1.4 RELATED DOCUMENTS

SECTION 2: ROUTINE MAINTENANCE

2.1 Cleaning

2.2 Periodic Safety and Functional Checks

2.3 Battery

SECTION 3: PERFORMANCE VERIFICATION

3.1 Introduction

3.2 Equipment Needed

3.3 Performance Tests

3.3.1 Battery Charge

3.3.2 Performance Tests

3.3.2.1 Power-On Self-Test

3.3.2.2 Factory Power-On Defaults and Alarm Limit Ranges

3.3.3 Hardware and Software Tests

3.3.3.1 Operation with a Pulse Oximeter Tester

3.3.3.1.1 Alarms and Alarm Silence

3.3.3.1.2 Alarm Volume Control

3.3.3.1.3 Pulse Tone Volume Control

3.3.3.1.4 Dynamic Operating Range

3.3.3.1.5 Nurse Call

3.3.3.1.6 Operation on Battery Power

3.3.3.2 General Operation

3.3.3.2.1 LED Excitation Test

3.3.3.2.2 Monitor Operation with a Live Subject

3.4 SAFETY TESTS

3.4.1 Ground Integrity

3.4.2 Electrical Leakage

3.4.2.1 Earth Leakage Current

3.4.2.2 Enclosure Leakage Current

3.4.2.3 Patient Applied Risk Current

3.4.2.4 Patient Isolation Risk Current - (Mains Voltage on the Applied Part)

SECTION 4: AUDIBLE ALARM SETTINGS & SERVICE MENU

4.1 Introduction

4.2 Audible Alarm Settings

4.2.1 Alarm Silence State

4.2.2 Alarm Silence Duration

4.2.3 Alarm Volume

4.3 SERVICE MENU

4.3.1 Accessing Menu Items

4.3.2 Menu Item 1 (Save Current Values as Power-On Default)

4.3.3 Menu Item 2 (Return to Default Settings)

4.3.4 Menu Item 3 (Not Displayed)

4.3.5 Menu Item 4 (Not Displayed)

4.3.6 Menu Item 5 (Alarm Silence Behavior)

4.3.7 Menu Item 6 (Baud Rate)

4.3.8 Menu Item 7

4.3.9 Menu Item 8

4.3.10 Menu Item 9

SECTION 5: TROUBLESHOOTING

5.1 Introduction

5.2 How to Use this Section

5.3 Who Should Perform Repairs

5.4 Replacement Level Supported

5.5 Obtaining Replacement Parts

5.6 TROUBLESHOOTING GUIDE

5.6.1 Power

5.6.2 Buttons

5.6.3 Display/Alarms

5.6.5 Serial Port

5.7 ERROR CODES

SECTION 6: DISASSEMBLY GUIDE

6.1 Introduction

6.2 Prior to Disassembly

6.3 FUSE REPLACEMENT

6.4 MONITOR DISASSEMBLY

6.5 MONITOR REASSEMBLY

6.6 BATTERY REPLACEMENT

6.7 POWER ENTRY MODULE (PEM) REMOVAL/INSTALLATION

6.8 POWER SUPPLY REMOVAL/INSTALLATION

6.9 DISPLAY PCB REMOVAL/INSTALLATION

6.10 UIF PCB REMOVAL/INSTALLATION

6.11 ALARM SPEAKER REMOVAL/INSTALLATION