Download Mallinckrodt NPB-190 Service 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.
 1999 Mallinckrodt Inc. All rights reserved.
0123
033925E-0599
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 .......................................................................................
List Of Figures.........................................................................................
List Of Tables..........................................................................................
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.......................................................................
3.4
Safety Tests .................................................................................
Section 4: Audible Alarm Settings & Service Menu.................................
4.1
Introduction ..................................................................................
4.2
Audible Alarm Settings.................................................................
4.3
Service Menu ...............................................................................
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..................................................................................
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............................................
Section 7: Spare Parts ................................................................................
7.1
Introduction ..................................................................................
Section 8: Packing For Shipment ..............................................................
8.1
General Instructions .....................................................................
iii
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1-1
1-2
1-3
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2-1
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2-1
3-1
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3-9
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6-9
6-10
6-11
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8-1
8-1
iii
Table of Contents
8.2
Repacking in Original Carton .......................................................
8.3
Repacking in a Different Carton...................................................
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 ................................................................................
Appendix (Serial Port Interface Protocol).................................................
A1
Introduction ..................................................................................
A2
Enabling the Serial Port................................................................
A3
Connecting to the Serial Port .......................................................
A4
Real-Time Printout .......................................................................
A5
Nurse Call ....................................................................................
Technical Supplement ................................................................................
S1
Introduction ..................................................................................
S2
Oximetry Overview.......................................................................
S3
Circuit Analysis.............................................................................
S4
Functional Overview.....................................................................
S5
AC Input .......................................................................................
S6
Power Supply PCB Theory of Operation......................................
S7
Battery..........................................................................................
S8
User Interface PCB (UIF) .............................................................
S9
Front Panel Display PCB and Controls ........................................
S10 Schematic Diagrams....................................................................
iv
8-1
8-3
9-1
9-1
9-1
9-2
9-2
9-2
9-2
9-3
A-1
A-1
A-1
A-1
A-2
A-5
S-1
S-1
S-1
S-3
S-3
S-3
S-4
S-5
S-5
S-8
S-9
Table of Contents
LIST OF FIGURES
Figure 1-1: NPB-190 Front Panel..................................................................
Figure 1-2: NPB-190 Rear Panel ..................................................................
Figure 3-1: NPB-190 Controls.......................................................................
Figure 3-2: Self-Test Display.........................................................................
Figure 3-3: Adjusting High %SpO2 Alarm Limit ............................................
Figure 3-4: Adjusting Low %SpO2 Alarm Limit .............................................
Figure 3-5: Adjusting High Heart Rate Alarm Limit .......................................
Figure 3-6: Adjusting Low Heart Rate Alarm Limit ........................................
Figure 3-7: Alarm Silence Duration ...............................................................
Figure 3-8: Alarm Volume Display ................................................................
Figure 4-1: NPB-190 Controls.......................................................................
Figure 6-1: Fuse Removal.............................................................................
Figure 6-2: NPB-190 Corner Screws ............................................................
Figure 6-3: Separating Case Halves .............................................................
Figure 6-4: Battery Removal .........................................................................
Figure 6-5: Power Entry Module....................................................................
Figure 6-6: Power Supply Leads Connections ..............................................
Figure 6-7: Power Supply..............................................................................
Figure 6-8: Display PCB................................................................................
Figure 6-9: UIF PCB......................................................................................
Figure 6-10: Alarm Speaker ..........................................................................
Figure 7-1: NPB-190 Exploded View.............................................................
Figure 8-1: Repacking the NPB-190 .............................................................
Figure A-1: Serial Port Pin Layout.................................................................
Figure A-2: Real-Time Printout .....................................................................
Figure S-1: Oxyhemoglobin Dissociation Curve ...........................................
Figure S-2: NPB-190 Functional Block Diagram...........................................
Figure S-3 Front End Red/IR Schematic Diagram .......................................
Figure S-4 Front End LED Drive Schematic Diagram..................................
Figure S-5 Front End Output Schematic Diagram .......................................
Figure S-6 Front End Power Supply Schematic Diagram ............................
Figure S-7 Isolation Barrier EIA-232 Port Schematic Diagram ....................
Figure S-8 CPU Core Schematic Diagram ..................................................
Figure S-9 PIC and Speaker Schematic Diagram .......................................
Figure S-10 Indicator Drive Schematic Diagram..........................................
Figure S-11 Core Power Supply Schematic Diagram ..................................
Figure S-12 Parts Locator Diagram for UIF PCB.........................................
Figure S-13 Display PCB Schematic Diagram.............................................
Figure S-14 Parts Locator Diagram for Display PCB ...................................
Figure S-15 Power Supply Schematic Diagram ...........................................
Figure S-16 Parts Locator Diagram for Power Supply PCB.........................
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3-3
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3-4
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6-7
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6-9
6-10
6-12
7-2
8-2
A-2
A-2
S-2
S-3
S-11
S-13
S-15
S-17
S-19
S-21
S-23
S-25
S-27
S-29
S-31
S-33
S-35
S-37
v
Table of Contents
LIST OF TABLES
Table 3-1: Dynamic Operating Range..........................................................
Table 3-2: Earth Leakage Current Limits .....................................................
Table 3-3: Enclosure Leakage Current Limits..............................................
Table 3-4: Patient Leakage Current Limits ..................................................
Table 3-5: Patient Leakage Current Test Configurations - Mains
Voltage on the Applied Part ........................................................
Table 4-1: Factory Default Settings..............................................................
Table 5-1: Problem Categories ....................................................................
Table 5-2: Power Problems..........................................................................
Table 5-3: Button Problems .........................................................................
Table 5-4: Display/Alarms Problems............................................................
Table 5-5: Operational Performance Problems ...........................................
Table 5-6: Serial Port Problems ...................................................................
Table 5-7: Error Codes.................................................................................
Table A-1: Serial Port Pin Outs ....................................................................
Table A-2: Status Codes ..............................................................................
vi
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3-10
3-11
3-12
3-12
4-3
5-2
5-3
5-4
5-4
5-5
5-6
5-7
A-1
A-4
SECTION 1: INTRODUCTION
1.1
1.2
1.3
1.4
1.1
Manual Overview
NPB-190 Pulse Oximeter Description
Power-On Self Test
Related Documents
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
(SpO2), 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
11
10
NPB190
15
14
13
12
Figure 1-1: NPB-190 Front Panel
1.
2.
3.
4.
5.
6.
7.
8.
SpO2 Sensor Port
Power On/Standby Button
AC/Battery Charging Indicator
Low Battery Indicator
%SpO2 Display
Pulse Amplitude Indicator
Pulse Beats per Minute Display
Alarm Silence Indicator
9.
10.
11.
12.
13.
14.
15.
Alarm Silence Button
Adjust Up Button
Adjust Down Button
Pulse Search Indicator
Upper Alarm Limit Button
Lower Alarm Limit Button
Speaker
2
1
3
TM
NELLCOR PURITAN BENNETT, INC.
PLEASANTON, CA 94588, U.S.A.
T 0.50A 250V
R
IPX1
NRTL/C
5
MADE IN IRELAND
NELLCOR PURITAN BENNETT EUROPE BV,
's-HERTOGENBOSCH, THE NETHERLANDS
CISPR 11
Group 1
Class B
012 3
NPB-190
SN
2X
100-120 V~ 200-240 V~
50/60Hz 20 VA
036400-1098
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
4
Figure 1-2: NPB-190 Rear Panel
1. Equipotential Terminal
2. AC Connector
3. Serial Port
1.3
4. Fuse Drawer
5. Voltage Selector Switch
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:
•
•
•
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 %SpO2 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 %SpO2 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
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.
BATTERY
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
3.2
3.3
3.4
3.1
Introduction
Equipment Needed
Performance Tests
Safety Tests
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
Digital multimeter (DMM)
Durasensor
oxygen transducer
Oxisensor II oxygen transducer
Pulse oximeter tester
Safety analyzer
Sensor extension cable
Serial interface cable
Stopwatch
3.3
Description
Fluke Model 87 or equivalent
DS-100A
D-25
SRC-2
Must meet current AAMI specifications
EC-4 or EC-8
EIA-232 cable (optional)
Manual or electronic
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
Lower Alarm Upper Alarm
Limit
Limit
Adjust
Down
Adjust
Up
Figure 3-1: NPB-190 Controls
Note:
3.3.2.1
3-2
Refer to Figure 3-1, NPB-190 Controls, when following the instructions
listed below.
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:
Section 3: Performance Verification
a.
All indicators light for a few seconds as illustrated in Figure 3-2.
LEDs
illuminated
888 displayed
LED
illuminated
NPB190
10 segments
LED
illuminated 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 1second 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.
3.3.2.2
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).
Factory Power-On Defaults and Alarm Limit Ranges
Note:
1.
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.
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 %SpO2 display indicates
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.
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 %SpO2 display reduces to a minimum of “85”.
Note:
3.
A decimal point to the right of the value in either display indicates that
the alarm limits are not power-on default values.
Press the Lower Alarm Limit button. Verify that the monitor emits a single
beep and that the %SpO2 display indicates an alarm limit of “85” for 3
seconds. Verify that three dashes are displayed at the bottom of the pulse
rate display window.
Figure 3-4: Adjusting Low %SpO2 Alarm Limit
4.
Press the Lower Alarm Limit button. Press and hold the Adjust Down
button and verify that the %SpO2 display reduces to a minimum of “20”.
Press and hold the Adjust Up button and verify that the %SpO2 display
cannot be raised past the upper alarm limit setting of “85”.
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 %SpO2 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 %SpO2 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 %SpO2
display indicates an alarm limit of “100”.
12. Press and release the Lower Alarm Limit button. Verify that the %SpO2
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:
•
•
3.3.3.1
Operation with a Pulse Oximeter Tester
General Operation
Operation with a Pulse Oximeter Tester
Operation with an SRC-2 pulse oximeter tester includes the following tests:
•
•
•
•
•
3.3.3.1.1
Alarms and Alarm Silence
Alarm Volume Control
Pulse Tone Volume Control
Dynamic Operating Range
Nurse Call
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
RATE
LIGHT
MODULATION
RCAL/MODE
2.
POSITION
38
HIGH
OFF
RCAL 63/LOCAL
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
SRC-2.
b.
The pulse tone is heard.
c.
Zeroes are displayed in the %SpO2 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.
5.
The audible alarm sounds and both the %SpO2 and pulse rate displays
flash. This is an indication that both parameters have violated the
default alarm limits.
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
%SpO2 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.
3-6
Release the Alarm Silence button. Verify the following:
a.
The alarm remains silenced.
b.
The Alarm Silence indicator lights.
c.
The %SpO2 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 %SpO2 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.
Section 3: Performance Verification
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 %SpO2 display indicates “VOL”, and the pulse rate display
indicates the default setting of 5.
Figure 3-8: Alarm Volume Display
3.3.3.1.3
3.3.3.1.4
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.
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.
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.
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
Table 3-1: Dynamic Operating Range
RATE
38
112
201
201
3.3.3.1.5
The Nurse Call tests must be performed with the instrument operating
on AC power.
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.
4.
Turn the instrument off. Disconnect the voltmeter and the SRC-2.
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:
4.
3.3.3.2
NPB-190 Indications
SpO2
Pulse Rate
79 - 83* 37 - 39*
79 - 83* 110 - 114
79 - 83* 198 - 204*
79 - 83* 198 - 204*
Nurse Call
Note:
3.3.3.1.6
SRC-2 Settings
LIGHT
MODULATION
HIGH2
LOW
HIGH1
HIGH
LOW
LOW
LOW
HIGH
If the Low Batter Indicator is illuminated, perform the procedure
outlined in step 3.3.1.
Connect the instrument to AC and verify that the AC Power Indicator turns
on and that the instrument is monitoring normally.
General Operation
The following tests are an overall performance check of the system:
•
•
3.3.3.2.1
LED Excitation Test
Monitor Operation with a Live Subject
LED Excitation Test
This procedure uses normal system components to test circuit operation. A
Nellcor Oxisensor IIâ oxygen transducer, model D-25, is used to examine LED
intensity control. The red LED is used to verify intensity modulation caused by
the LED intensity control circuit.
3-8
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.
3.4
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 Durasensorâ oxygen transducer, model DS-100A, to the
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.
SAFETY TESTS
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:
3.4.2.1
For the following tests, ensure that the AC switch on the rear of the
instrument is configured for the AC voltage being supplied.
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.
Table 3-2: Earth Leakage Current Limits
AC
POLARITY
Normal
Reversed
Normal
Normal
3.4.2.2
LINE CORD
Closed
Closed
Open
Closed
NEUTRAL
CORD
Closed
Closed
Closed
Open
LEAKAGE
CURRENT
500 µA
500 µA
1000 µA
1000 µA
Enclosure Leakage Current
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
3-10
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 cm2 foil in contact with the instrument case making sure the foil
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
Open
Open
Open
3.4.2.3
NEUTRAL
LINE CORD
Closed
Closed
Open
Closed
Open
Closed
POWER LINE
GROUND CABLE
Closed
Open
Closed
Closed
Closed
Open
IEC 601-1
100 µA
500 µA
500 µA
500 µA
500 µA
500 µA
AAMI/ANSI ES1
STANDARD
100 µA
300 µA
300 µA
100 µA
300 µA
300 µA
Patient Applied Risk Current
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.
1.
Configure the electrical safety analyzer as follows:
Function:
Range:
Patient Leakage
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
Normal
Normal
Reverse
Reverse
Reverse
3.4.2.4
NEUTRAL
LINE
Closed
Open
Closed
Closed
Open
Closed
POWER LINE
GROUND
CABLE
Closed
Closed
Open
Closed
Closed
Open
IEC 601-1
100 µA
500 µA
500 µA
100 µA
500 µA
500 µA
AAMI/ANSI
ES1
STANDARD
10 µA
50 µA
50 µA
10 µA
50 µA
50 µA
Patient Isolation Risk Current - (Mains Voltage on the Applied Part)
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:
Range:
Patient Leakage (Mains On Applied Part)
µA
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
Reverse
3-12
NEUTRAL
LINE
Closed
Closed
POWER
LINE
GROUND
CABLE
Closed
Closed
IEC 601-1
5 mA
5 mA
AAMI/ANSI
ES1
STANDARD
50 µA
50 µA
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
Set lower
limit
Set upper
limit
Adjust
down
Adjust
up
Figure 4-1: NPB-190 Controls
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.
1.
Press and hold the Alarm Silence button for more than 3 seconds.
4.2.3 Alarm Volume
4-1
Section 4: Audible Alarm Settings & Service Menu
2.
4.3
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.
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.
4-2
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 %SpO2 alarm limits less than 80%. If an
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.
Section 4: Audible Alarm Settings & Service Menu
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
SpO2 High
SpO2 Low
Pulse rate High
Pulse rate Low
Pulse beep volume
Alarm Volume
Alarm Silence Duration
Alarm Silence Behavior
Baud Rate
Default Value
100%
85%
170 bpm
40 bpm
Level 4
Level 5
60 seconds
0 (Off with reminder)
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.
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
%SpO2 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
5.2
5.3
5.4
5.5
5.6
5.7
5.1
Introduction
How to Use this Section
Who Should Perform Repairs
Replacement Level Supported
Obtaining Replacement Parts
Troubleshooting Guide
Error Codes
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.
Table 5-1: Problem Categories
Problem Area
Refer to Paragraph
1. Power
5.6.1
• No power-up on AC and/or DC
• Fails power-on self-test
• Powers down without apparent cause
2. Buttons
5.6.2
• Monitor does not respond properly to
buttons
3. Display/Alarms
5.6.3
• Displays do not respond properly
• Alarms or other tones do not sound
properly or are generated without apparent
cause
4. Operational Performance
5.6.4
• Displays appear to be operational, but
monitor shows no readings
• Suspect readings
5. Serial Port
5.6.5
• NPB-190 and PC not communicating
properly
• Nurse Call not functioning properly
All of the categories in Table 5-1 are discussed in the following paragraphs.
5-2
Section 5: Troubleshooting
5.6.1 Power
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. Ensure that the NPB-190 is plugged into an operational AC
1. BATTERY LOW
outlet and the AC indicator is on.
indicator lights
steadily while NPB2. Check the fuses. The Power Entry Module contains the
190 is connected to
fuses as indicated in paragraph 6.3 and Figure 6-3 of the
AC and battery is
Disassembly Guide section. Replace if necessary.
fully charged.
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.
2. The NPB-190 does
not operate when
disconnected from
AC power.
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.
3. BATTERY LOW
indicator on during
DC operation and
an alarm is
sounding.
4. Battery does not
charge.
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.
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.
Table 5-3: Button Problems
Condition
Recommended Action
1. The NPB-190 responds
to some, but not all
buttons.
1. Replace Top Housing assembly.
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. If the buttons still do not work, replace the UIF PCB.
2. Replace Top Housing assembly.
3. If the buttons still do not work, replace the UIF PCB.
5.6.3 Display/Alarms
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.
2. All display segments
do not light during
POST.
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.
3. All Front Panel LED
indicators do not light
during POST.
1. Check the connection between the membrane
panel and J5 of the UIF PCB.
4. Alarm sounds for no
apparent reason.
1. Moisture or spilled liquids can cause an alarm to
sound. Allow the monitor to dry thoroughly
before using.
2. Replace Top Housing assembly.
2. If the condition persists, replace the UIF PCB.
5-4
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.
1. The sensor may be damaged; replace it.
2. If the condition still persists, replace the UIF
PCB.
2. SpO2 or pulse rate values 1. The sensor may be damp or may have been
reused too many times. Replace it.
change rapidly; Pulse
Amplitude indicator is
2. An electrosurgical unit (ESU) may be
erratic.
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.
Table 5-6: Serial Port Problems
Condition
Recommended Action
1. No printout is being
received.
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.
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. 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
Section 5: Troubleshooting
5.7
ERROR CODES
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
1
POST failure
4
Battery dead
Possible Solutions
Replace UIF PCB
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
1. Replace UIF PCB
6
Boot CRC error
Replace UIF PCB
7
Error on UIF PCB
1. Cycle power to clear error.
5
2. Replace Power Supply
2. Check voltage selector
switch for proper setting.
3. Replace UIF PCB
11
Flash ROM corruption
Replace UIF PCB
76
Error accessing EEPROM
Replace UIF PCB
80
Institutional default values lost
and reset to factory default
values
Replace UIF PCB
84
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:
6.2
Some spare parts have a business reply card attached. When you receive
these spare parts, please fill out and return the card.
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.
6-2
Put new 0.5 amp fuses in the drawer and reinsert the drawer in the power
module.
Section 6: Disassembly Guide
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.
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
J6
Power supply
harness
Figure 6-3: Separating Case Halves
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.
6-4
Install the four corner screws.
Section 6: Disassembly Guide
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.
Use needle-nose pliers to disconnect the leads from the battery.
3.
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.
6.7
Turn the monitor on and verify proper operation.
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 65).
G
N
L
Figure 6-5: Power Entry Module
Installation
6-6
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.
Section 6: Disassembly Guide
6.8
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.
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.
6.
Lift the Power Supply out of the bottom case.
W3
Equipotential
W2
Blue to
Lug
Brown to
"N" on
"L" on
PEM
PEM
W1
to
Equipotential
Lug
G
N
W4
Red
L
W5
Black
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.
13. Complete the procedure in paragraph 6-5.
6-8
Section 6: Disassembly Guide
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
J4
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).
J3
J5
Figure 6-9: UIF PCB
6.
6-10
Remove the UIF PCB from the top case.
Section 6: Disassembly Guide
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
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 610).
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
6-12
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.
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
1
2
3
4
5
6
7
8
9
Description
Top Case Assembly (Membrane Panel Included)
Fuse Drawer
Fuses
Power Entry Module
Power Supply
Display PCB
Battery
Battery Bracket
UIF PCB
Sensor Lock (not shown)
Alarm Speaker (not shown)
Ground Clip (not shown)
Rubber Feet (not shown)
Power Cord (not shown)
Part No.
048428
691500
691032
691499
035200
035196
640119
035307
035192
022943
033494
035400
4-003818-00
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
1
NP
B1
90
9
2
3
8
4
7
5
6
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
Figure 8-1: Repacking the NPB-190
8-2
2.
Place in shipping carton and seal carton with packaging tape.
3.
Label carton with shipping address, return address and RGA number.
Section 8: Packing for Shipment
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.
8-3
SECTION 9: SPECIFICATIONS
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.1
General
Electrical
Physical Characteristics
Environmental
Alarms
Factory Default Settings
Performance
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
9.4
PHYSICAL CHARACTERISTICS
Dimensions
3.3 in H x 10.4 in W x 6.8 in D
8.4 cm H x 26.4 cm W x 17.3 cm D
Weight
5.5 lb
2.5 kg
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
Relative Humidity
9.5
700 hPa to 1060 hPa
(20.65 inHg to 31.27 inHg)
15% RH to 95% RH, noncondensing
ALARMS
Alarm Limit Range
9.6
% Saturation
20–100%
Pulse Rate
30–250 bpm
FACTORY DEFAULT SETTINGS
Parameter
SpO2 High Alarm
SpO2 Low Alarm
High pulse rate Alarm
Low pulse rate Alarm
Audible Alarm Volume
Audible Alarm Silence Duration
Pulse Beep Volume
Communication Protocol
Alarm Silence Behavior
Baud Rate
9-2
Default Setting
100%
85%
170 bpm
40 bpm
Level 5
60 seconds
Level 4
Serial output mode ASCII
Off with a reminder
9600
Section 9: Specifications
9.7
PERFORMANCE
Measurement Range
SpO2:
0–100%
Pulse/Heart Rate:
20–250 bpm
Accuracy
SpO2
Adult:
Neonate:
70–100% ± 2 digits
0–69% unspecified
70–100% ± 3 digits
0–69% unspecified
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.
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
2
3
5,10
11
1, 4, 6-9, 12-15
Line
RxD
TxD
GND
Nurse call
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).
9
1
10 11 12 13 14 15
2
3
4
5
6
7
8
Figure A-1: Serial Port Pin Layout
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
NPB-190
Time Tag
123456789
123456791
123456793
123456795
123456797
123456799
123456801
123456803
123456805
123456807
123456809
123456811
123456813
123456815
123456817
123456819
123456821
123456823
123456825
123456827
123456829
123456831
123456833
NPB-190
Time Tag
123456835
NPB-190
Time Tag
123456837
123456839
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
100
120
100
124
100
190
100
190*
100
190*
100
190*
100
190*
100
190*
100
190*
100
190*
100
190*
------------------------------------------------Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
----Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
79*
59*
79*
59*
SpO2 Limit:
30-100%
PR Limit: 100-180 bpm
PA
Status
220
220
220
220
PH
220
PH
220
PH
220
PH
220
PH
220
PH LB
220
PH LB
220
PH LB
--SD
LB
--SD
LB
--SD
--SD
--SD
--SD
--PS
--PS
--PS
--PS
--PS
--PS
SpO2 Limit:
30-100%
PR Limit: 100-180 bpm
PA
Status
--PS
SpO2 Limit:
80-100%
PR Limit: 100-180 bpm
PA
Status
220
SL PL LB
--PS SL PL LB
Figure A-2: Real-Time Printout
A-2
Appendix
A4.1
Column Headings
NPB-190
Time Tag
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
SpO2 Limit:
30-100%
PA
Status
PR Limit: 100-180 bpm
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 SpO2 limits changed from 30-100% to
80-100%.
Printout Source
NPB-190
Time Tag
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
SpO2 Limit:
30-100%
PA
Status
PR Limit: 100-180 bpm
Data in the highlighted box above represents the source of the printout, in this
case the NPB-190.
Software Revision Level
NPB-190
Time Tag
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
SpO2 Limit:
30-100%
PA
Status
PR Limit: 100-180 bpm
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
Time Tag
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
SpO2 Limit:
30-100%
PA
Status
PR Limit: 100-180 bpm
The last data field in the top line indicates the high and low alarm limits for
%SpO2 and for the pulse rate (PR). In the example above, the low alarm limit for
SpO2 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
Time Tag
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
SpO2 Limit:
30-100%
PA
Status
PR Limit: 100-180 bpm
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 %SpO2 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
123456789
%SpO2
100
PR (bpm)
120
PA
220
Status
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
Time Tag
123456795
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
100
190*
SpO2 Limit:
30-100%
PA
Status
220
PH
PR Limit: 100-180 bpm
Patient data are highlighted in the display above. Parameter values are displayed
directly beneath the heading for each parameter. In this example, the %SpO2 is
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.
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
Time Tag
123456795
Version 1.0.0
CRC XXXX
%SpO2
PR (bpm)
100
190*
SpO2 Limit:
30-100%
PA
Status
220
PH
PR Limit: 100-180 bpm
The Status column indicates alarm conditions and operating status of the NPB190. 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
LB
AS
AO
SD
PS
LP
SH
SL
PH
PL
Note:
A-4
Meaning
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 Sensor Disconnect will also cause three dashes (- - -) to be displayed
in the patient data section of the printout.
Appendix
A5
NURSE CALL
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 fractional
100
saturation = saturation x 100-(% carboxyhemoglobin +%methemoglobin)
S2.2
Measured Versus Calculated Saturation
When saturation is calculated from a blood gas measurement of the partial
pressure of arterial oxygen (PaO2), the calculated value may differ from the
NPB-190 SpO2 measurement. This is because the calculated saturation may not
have been corrected for the effects of variables that can shift the relationship
between PaO2 and saturation.
Figure S2-1 illustrates the effect that variations in pH, temperature, partial
pressure of carbon dioxide (PCO2), and concentrations of 2,3-DPG and fetal
hemoglobin may have on the oxyhemoglobin dissociation curve.
Saturation (%)
100
pH
Temperature
PCO2
2,3-DPG
Fetal Hb
pH
Temperature
PCO2
2,3-DPG
50
0
50
100
PO2 (mmHg)
Figure S-1: Oxyhemoglobin Dissociation Curve
S-2
Technical Supplement
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 SPO2 module, PIC, CPU, and Memory. Other key components
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; SpO2, heart rate, and Blip Bar LEDs, and their associated
driver circuits.
Power
Entry
Module
Power Supply
Fuses
On/Off Switch
Battery
Charger
DC
Supply
Battery
Membrane
Panel
LED Display
Alarm Speaker
EEPROM
PIC
80196
CPU
Serial port
System RAM
Flash ROM
64K
UIF PCB
SPO2 Module
Patient
Connection
Figure S-2: NPB-190 Functional Block Diagram
S5
AC INPUT
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
Technical Supplement
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
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 SpO2 function. Serial port communication is
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 SpO2 function is controlled by a pulse width modulator (PWM) function
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 SpO2 circuit on the UIF PCB. An A/D
function in the 196 converts these signals to digital values for %SpO2 and heart
rate. The values are then displayed and stored.
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 %SpO2
value being measured. The pulse beep tone will rise and fall with the measured
%SpO2 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
Technical Supplement
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.
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 %SpO2 and the
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 %SpO2 level being
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.
S-8
Technical Supplement
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
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
VREF
I12
VREF
14
1
3
I11
2
U6
74HC00S
7
C22
0.01U
AD822 BYPASS
+10V
VREF
I13
U6
74HC00S
I14
14
C19
0.01U
4
IRLED/AV
6
5
VCC
PWM2
7
I16
I15
U1
C21
0.01U
C20
0.01U
TP5
I3
R10
88.7K_0.1%
VCC
14
X
15
Y
4
7
R6
2.00K
U4
AD822
+
I2
2
R7
51.1K
3
-5V
1
+
2
1
Z0
Z1
5
3
VSS
VREF
RED CHANNEL
C7
TP10
0.1U
Z5U
I9
G_REDDC
I10
VCC
VREF R12
I25 C24
100K
220P
R16
82.5K
I7
+10V
C23
1000P
2
Q7
2N3906S 1
3
1.00K
R77
13
+
TP6
6
R11
3.32K
V+
7
5
6
+10V
GND
C1
0.47U
25V
3216
4
13
V+
1
+
11
R17
100K
U10
LF444CM
CR3
1N914S
+
13
-
12
4
+
14
11
C28
0.068U
U10
LF444CM
-5V
4
-5V
TP9
+ I17
IR CHANNEL
-5V
TP4
C14
0.12U
+10V
I24
R2
100K
G_IRDC
V-
7343
5
4
I6
U12
DG201S
13
I26
V+
9
-5V
10
GND
V4
-5V
75
R3
3.32K
2
-
3
+
6
418
C2
0.47U
25V
3216
I22
U7
LF441S
+ I18
C16
0.068U
2
-
3
+
CR1
1N914S
4
1
11
-
U10
LF444CM
R5
100K
TP3
+
6
-
5
+
4
7
11
-
CR2
1N914S
-5V
TP2
VREF
+10V
R4
100K
I171
C17
0.12U
+
I20
+10V
TP7
+10V
1
5
1.00K
R109
R1
100K
3
I8
11
C13
1000P
2
Q6
2N3906S 1
3
VREF
C15
220P
3
C56
22U
20V
1
GND
TP11
8
+
-
7
VREF
2
-5V
8
-
-5V
3
+
C26
0.068U
+10V
-
V5
U12
DG201S
U4
AD822
1
TP8
U12
DG201S
VREF
CR4
1N914S
4
-
C27
0.12U
1
I5
8
+10V
10
I21
R9
88.7K_0.1%
I4
9
R13
100K
-5V
DG201S BYPASS
+
I19
+10V
R14
100K
+10V
3
R15
82.5K
I23
C25
0.12U
CD4053S
4
-
R8
1.00M
G_PWM2
G_MUX1
8
-
I1
Y0
Y1
VEE
8
6
11
10
9
XO 12
X1 13
Z
VREF
+10V
INH
A
B
C
3
-5V
16
C18
0.068U
U10
LF444CM
-5V
I173
I172
-5V
VREF
SAMPIR
SAMPRED
G_LEDDR
OFF/ON
FRONT END RED/IR
035191
Figure S-3
Front End Red/IR Schematic Diagram (1 of 10)
S-11
+10V
VREF
U5
AD822
C36
390P
5
+
6
-
8
7
4
+10V
I27
I28
-5V
U12
DG201S
13
V+
16
R25
3.32K
15
I30
14
R29
1.00M
G_LEDDR
GND V5
4
I31
C34
-5V
18P
IR/RED
R27
280K
+10V
R21
3.32K
R28
182K
I33
8
VREF
VCC
C35
0.047U
+3
1
U5
AD822
IR/RED
VCC
C8
0.1U
Z5U
- 2
4
R37
511K
R35
10.0K
I35
I46
1
C37
0.047U
I47
3
Q10
MPSA56S
I32
J1
LED DRIVE
R44
2.74K
2
I34
-5V
C33
0.01U
I37
VCC
U2
6
6
11
10
9
VREF
10
R20
10.0K
5
9
4
8
3
7
2
6
1
12
13
I36
R18
2.74K
2
2
1
1
Q9
MPSA56S
3
R22
10.0K
5
3
I39
I38
VCC
INH
A
B
C
XO
X1
14
Y
15
Z
Y0
Y1
C29
4.7P
I45
X
6
7
U11
2
LT1013S
4
VSS
Q8
2N3906S
1
+
-
I48
R23
182K
3
+
R43
182K
R40
100K
8
R19
10.0K
TP18
C39
0.1U
C41
0.1U
C31
100P
C32
100P
I40
3
3
C30
100P
1
2
I42
1
I43
2
C38
R33
10.0
3
1
R32
10.0K
R34
10.0K
Q3
2N3904S
2
22P
I51
I44
R36
22.1K
TP17
VREF
3
3
R24
100K
CR5
R26
100K
CR6
3
TP12
1
OFF/ON
1N914S
1
LEDDIS
VREF
1N914S
I49
I50
TP14
R30
6.04K_0.1%
VCC
R31
40.2K
R38
15.8K
I52
+
3
4
C9
0.1U
Z5U
R41
20.0K
C42
0.022U
CON_DB9F
Q2
MPSA06S
TP19
R39
20.0K
C40
0.022U
11
Q1
MPSA06S
R42
100K
8
CD4053S
RSENS
G_PWM1
1
VEE 7
Z0
Z1
G_PWM2
2
16
VCC 1
6
+
5
-
2
-
PHOTOI
U11
LT1013S
RSENS
FRONT END LED DRIVE
Figure S-4
Front End LED Drive Schematic Diagram (2 of 10)
035191
S-13
I57
I56
I55
ZERO-L
REDDC
G_REDDC
R51
3.32K
C55
0.01U
R49
3.32K
R45
100K
DG201S BYPASS
0.015U
Guard Ring CK06
+5.7V
U9
LMC6044S
VREF
2
15
GNDV5
U13
DG201S
C46
1000P
I54
+5.7V
U9
TP20 LMC6044S
C6GUARD
12
4
13
-5V
R56
15.0K
VCC
C45
0.01U
I59
C52
0.01U
I61
VCC
R54
34.8K
I62
4
1
2
INH
A
B
C
12
13
XO
X1
11
R50
3.32K
C44
0.01U
I70
2
1
Y0
Y1
5
3
Z0
Z1
I63
C57
22U
20V
V- GND
4
5
3
V- GND
U13
DG201S
4
5
U13
DG201S
7343
-5V
-5V
-5V
U3
6
11
10
9
14
-
C53
0.01U
PWM0
REDLED/AV
R52
100K
+
+
VCC
V+
8
7
+
R55
12.1K
14
+10V
6
V+
16
VCC
13
V+
C54
0.01U
11
-
13
VCC
1
-
+10V
+10V
13
R53
3.32K
4
+
VCC
C43
0.1U
3216
I58
+
+10V
+
C3
0.47U
25V
I60
C6
3
DG201S SPARES
REDAC
VCC 16
X
14
Y
15
Z
4
I72
VEE 7
VSS 8
CD4053S
G_IRDC
IRDC
R61
3.32K
R46
100K
C51
0.01U
IRAC
R47
3.32K
I64
Guard Ring
C5
CK06
0.015U
+5.7V
I96
VREF
6
R59
3.32K
4
7
-
VREF
11
-
+10V
C50
0.1U
I65
+
+
+
3216
U9
LMC6044S
5
C4
0.47U
25V
C47
1000P
C49
0.01U
14
12
11
R57
12.1K
13
9
V+
10
11
GND
U13
5
DG201S
I69
V4
+5.7V
U9
TP21 LMC6044S
C5GUARD
10
R48
15.0K
R62
100K
PWM1
7
REDLED/AV
VREF
I67
4
U6
74HC00S
14
8
-
13
U6
74HC00S
R58
34.8K
+
+
9
-5V
I68
11
9
-
R60
3.32K
8
C48
0.01U
10
7
I71
G_MUX1
G_PWM1
Figure S-5
Front End Output Schematic Diagram (3 of 10)
035191
S-15
VDD
I41
T1
LPE-4841
I84
1
3
CR10
1N914S
C62
1000P
5%
1
C11
0.1U
Z5U
I73
4
VC
S/S
6
GNDS
7
GND
VIN
VSW
FB
C61
330P
I75
U14
1
5
8
2
I76
VSW
VFB
+
C63
47U
10V
7343
C10
0.1U
Z5U
22
C60
10U
16V
2
1
R64
49.9
3
5
I78
2
LT1373S
I85
4
I79
VIN
C67
22U
20V
CURRENT
CR9
MBRS130
+
R63
11.5K
1
1
78L05D
C12
0.1U
Z5U
+
C68
22U
20V
7343
C65
47U
10V
7343
TP16 +5.7V
C70
22U
20V
+
R70
10.0K
TP23
Q4
2N3904S
2
3
1
Q5
2N3904S
RAW-5V
VREF
3
1
7343
+
CR7
TP15
GND1 GND3 6
GND2 GND4 7
I82
I77
R66
36.5K
VOUT 1
R67
49.9
C64
47U
10V
7343
C59
0.1U
Z5U
1
VIN
2
3
I83
TP22 +10V
8
VCC
+
8
7343
1
HIGH
R65
4.99K
U8
8
C66
22U
20V TP28
VCC
7343
R69
1.0
5%
VREF
R68
182
NFB 3
I29
+
6
+
7
I81
RAW+10V
CR8
MBRS130
-5V
2
R71
49.9
2
MBRS130
I80
C58
0.1U
Z5U
C69
22U
20V
+
7343
Figure S-6
Front End Power Supply Schematic Diagram (4 of 10)
035191
S-17
VDD
CLKDRV1
L21
T2
SCHOTT 67129080
1
6
600R
2
4
I238
8
TH
I237
CR12
1N914
6
2
3
3
3
4
AC
V+
T1DIN
T2DIN
5
6
R1LDR
R2LDR
7
BYP
14
RXDIN
ISO_GND
V-
2
VPLUS
13
VMINUS
RTRI
8
R2IN
R1IN
9
10
CR16
BAV99
CR13
BAV99
CR14
BAV99
CR15
BAV99
MAX250S
U16
4N26
RXD232
T2OUT 11
T1OUT 12
TXDOUT
+
C74
4.7U
35V
NCALOUT
IGND
TP24
6
4
2
TH
C76
Z5U
0.1U
16
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
GND 7
R72
10.0K
J2
I
I87
MAX251S
5
EN
SHDN
10
11
I86
TXDLDR
DTRLDR
1
I192
8
1
R1DIN
R2DIN
2
EXCOM-SHTDWN
R1OUT
R2OUT
1
9
12
I88
TP26
RXDLDR
6
3
T1LDR
T2LDR 6
2
I99
2
13
T1IN
T2IN
1
RXD
4
5
2
I97
I98
TXD
NURSE-CALL
1
DTR
TX
D1
D2
2
U15
U19
PWR
1
TP31
U18
6N136
1
14
VMINUS
1
7
C73
1.0U
20V
TP29
5 5
3
+
3
L23
600R
R74
4.02K
3
C75
2200P
50V
+
CR11
SMCJ22C
22V
3
C71
1.0U
20V
C72
1.0U
20V
50V
50V
1
C117
C89
3300P 3300P
+
VPLUS
high power
clocks
3
CLKDRV2
3
2
L22
600R
17
IGND
CON_DB15F
I
VDD
R76
100M
1/4W
TH
R73
4.02K
TH
8
U17
6N136
DT1
600V
TH
6
2
5
3
7
E
SH1 BD MTG HOLE
ISOLATION BARRIER
EIA-232 Port
Figure S-7
Isolation Barrier EIA-232 Port Schematic Diagram (5 of 10)
035191
S-19
VDD
4700P
1
2
196PWR
I100
L6
3
4
+
50V
C79
470P
C102
47U
10V
7343
VDD
R117
2.21K
I103
I105
ADDRESS LATCHING
I107
U27
1
VREF
I102
L7
0.95U
L8
0.95U
L9
0.95U
I104
I106
I101
LEDDIS
IR/RED
REDDC
REDAC
IRDC
IRAC
RSENS
BTN_1
BTN_2
BTN_3
RWD_RST
L10
0.95U
L11
0.95U
L12
0.95U
L13
PORTSEL-L
0.95U
PWM1
PWM2
I221
WD_RST
VDD
R89
221
I110
I91
VDD
U30
TP32
1
PBRST
2
TD
3
Bypass cap
IRLED/AV
for U30
ST
RST-L
TP34
7
RAMEN-L
PHOTOI
SPI_MISO
~RST 6
TOL
4
VCC 8
GND
RST
5
I92
L15
VPP
VREF
ANGND
6
5
7
4
11
10
8
9
ACH0/P0.0
ACH1/P0.1
ACH2/P0.2
ACH3/P0.3
ACH4/P0.4
ACH5/P0.5
ACH6/P0.6
ACH7/P0.7
19
20
21
22
23
30
31
32
P1.0
P1.1
P1.2
P1.3/PWM1
P1.4/PWM2
P1.5/
BREQ
P1.6/
HLDA
P1.7/
HOLD
LTC1232
C91
0.1U
RXD
PICINT
BTN_4
BTN_5
I108
I109
SPI_MISO
PICINT
I112
L14
I111
0.95U
PWM0
U41
4
43
16
3
2
64
24
25
READY
RESET
NMI
EA
BUSWIDTH
HSI0
HSI1
18
17
15
44
42
39
33
38
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
0.95U
TXD
REDLED/AV
ZERO-L
74HC08S
9
6
8
5
PWR
37
13
12
IICDATA
RWD_RST
RP2
120
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
ALE/ ADV
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
62
RAD0
9
RAD1
10
RAD2
11
RAD3
12
RAD4
13
RAD5
14
RAD6
15
RAD7
16
RAD8
9
RAD9
RAD10 10
RAD11 11
RAD12 12
RAD13 13
RAD14 14
RAD15 15
RALE-L 16
RD
WRL/WR
WRH/BHE
INST
61
40
41
63
RRD-L
RWR-L
HSO0
HSO1
HSO2
HSO3
HSI2/HSO4
HSI3/HSO5
28
29
34
35
26
27
120 RP1
I74
I89
R111
SPI_SCK
CLK_OUT
67
66
R88
121
1
I167
GND1 14
GND2 36
GND3 68
R75
ALE
121
R86
RD-L
121
R87
WR-L
121
I93
221IIC_SCK
SPI_MOSI
0.95U
SAMPRED
L17
0.95U
OFF/ON
I90
L18
0.95U
SAMPIR
TP33
80C196KC
HC49S IS USED
ONLY IF ATP-SM
IS NOT AVAILABLE
SPARES
I66
11
12
LEDEN
1
RST-L
2
C90
22P
I239
74HC08S
11
1
2
3
4
5
6
7
8
9
1
TP35
R78
10.0K
ADDRESS DECODING - MEMORY MAPPING
6
VDD
C
OC
I177
U25
U34
I176
1
U34
1
3
Q11
SI9953 4
2
3
8
7
6
PORTSEL-L
11
WR-L
12
ADDR12
ADDR13
9
10
6
4
5
EXOUTEN-L
I113
I114
I115
I116
I117
I118
I120
I119
I121
I122
I124
I123
I128
I127
I125
I126
I178
74HC02S
U25
RAM - F000 - FFFF
8
J4
CON_7X2
C80
0.1U
C77
0.1U
1D
2D
3D
4D
5D
6D
7D
8D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
19
18
17
16
15
14
13
12
ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
ADDR13
ADDR14
ADDR15
C
OC
1D
2D
3D
4D
5D
6D
7D
8D
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
CLK
19
18
17
16
15
14
13
12
I242
I182
PICEN_L
LEDEN
EEPEN
AL_SIL_IND
PSRCH_IND
BATT_IND
VDD
I183
I184
I185
OC
74HC574S
C83
0.1U
EXTERNAL OUTPUT PORT
0000 - EFFF
1
2
74HC20S
5
VDD
2
4
6
8
10
12
14
I166
13
Q11
SI9953
74HC02S
1
3
5
7
9
11
13
VDD
VDD
U28
74HC08S
2
VDD
C116
47U
10V
7343
+
5
VDD
RST-L
2
3
4
5
6
7
8
9
EXOUTEN-L
11
IICDATA 4
ADDR0
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
U29
U41
3
RST-L
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
13
U41
74HC08S
19
18
17
16
15
14
13
12
EXTERNAL OUTPUT PORTI181
ATP-SM
C95
22P
1Q
2Q
3Q
4Q
5Q
6Q
7Q
8Q
74HC573S
10
U41
74HC08SI53
11
1
ALE
Y2
10MHZ
4
1
C82
0.1U
ALE
1D
2D
3D
4D
5D
6D
7D
8D
U20
L16
R110 I164
121
HC49S
2
3
4
5
6
7
8
9
74HC573S
R92
10.0K
I161
I162
Y5
10MHZ
1
2
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
TP36
I163
I234
I233
CLKOUT 65
XTAL1
XTAL2
U21
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
8
7
6
5
4
3
2
1
8
7
6
5
4
3
2
1
ADDR14
ADDR15
RAMEN-L
12
13
DISP_DATA
I179
74HC20S
U28
TP25
VDD
IIC_SCK
R101
U34
9
ROM - 0000 - EFFF
I231
8
8
10
10
9
I226
I227
I228
I229
DISPLAY CONNECTOR
10.0K
C118
0.1U
C78
0.1U
VDD
74HC08S
74HC02S
RAD0
RAD1
RAD2
RAD3
RAD4
RAD5
RAD6
RAD7
RAD8
RAD9
RAD10
RAD11
RAD12
RAD13
RAD14
RAD15
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
I159
I158
I156
I157
I152
I153
I155
I154
I145
I146
I148
I147
I151
I150
I149
I160
ADDR0
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
ADDR13
ADDR14
ADDR15
I168
I169
I170
I174
I175
ALE
RD-L
WR-L
SPI_MOSI
SPI_SCK
CPU CORE
I224
C81
0.1U
C94 VDD
0.1U
TP27
R131
10.0K
I230
U28
12
11
ROMEN-L
13
74HC08S
Figure S-8
CPU Core Schematic Diagram (Sheet 6 of 10)
035191
S-21
VDD
PICPWR
PICPWR
1
PWR_STATUS 2
3
4
I189
RP3
8
7
6
5
PICPWR
10K
U22
2
PICINT
3
RST-L
EXCOM-SHTDWN 4
5
6
PICEN_L
7
9 OSC1
10100
OSC2
I186
R95
Y3
9.83MHZ
1
2
20
1
8
19
PICPWR
HC49S
I187
Y4
9.83MHZ
1
4
RA0
RA1
RA2
RA3
RA4
RA5
VDD
MCLR
VSS1
VSS2
R81
332
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
N190PIC
21
22
23
24
25
26
27
28
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
11
12
13
14
15
16
17
18
PWRIND-L
BATT_CHECK
PWR_CTRL
PWR_BTN
AC_OK-L
LOW_BATT-L
CRIT_BATT-L
U32
R104
100
PWM_VOL
SPI_SCK
SPI_MOSI
SPI_MISO
NURSE-CALL
FREQ
Y1
32.768KHZ
4
I197
I190
I194
C100
33P
I195
C97
33P
TP37
3
I191
I198
I196
ATP-SM
C99
22P
1
ECPSM29T
PIC16C62
PICPWR
R80
10.0K
CR20
R79
10.0K
C93
0.1U
ADDR0
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
ADDR13
10
9
8
7
6
5
4
3
25
24
21
23
2
26
1
1N914S
1
C98
22P
VDD
WR-L
27
RD-L
22
RAMEN-L 20
32KX8
I202
PWR 28
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
SRAMPWR
O0
O1
O2
O3
O4
O5
O6
O7
11
12
13
15
16
17
18
19
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
C103
47U
10V
7343
+
27
22
WE
OE
CE
GND
14
14
I188
1
EEPEN
2
VDD
UPPER MEMORY - 2000 - 3FFF
U28
VDD
0.95U
IIC_SCK
3
U23
IICDATA
SCL
PWR 8
74HC08S
5
SDA
1
2
3
R96
10.0K
VDD
I201
VDD
8KX8
6
VDD
7
I199
I203
C87
0.1U
A0
A1
A2
WP
U39
I95
TLC27L2
+
R93
4.99K
GND 4
5
+
6
-
R132
1.00K
8
C105
+
47U
10V
7343
+
7
4
C120
+
47U
10V
7343
C110
+
47U
10V
7343
C121
C88
47U
Z5U
10V
0.1U
7343
LOWER MEMORY - 0000 - 1FFF
VDD
U24
6
U26
VDD
7
I235
I200
R100
10.0K
R98
150K
3
C96
1.0U
20V
I236
U39
TLC27L2
+
PWM_VOL
+
64KX16
U31
AT24C64S
R99
6.49K
11
C85
12
0.1U
13
15
16
17
18
19
55257S
I204
FREQ
28
R102
100K
2
8
+
1
1
VCC
2
4
VI2
VI4
7
N.C.
TH
IICDATA
GND1 6
VO1 5
VO2 8
1
2
3
A0
A1
A2
CON_2R
7
WP
TDA7052A
R133
1.00K
8KX8
PWR 8
I193
SDA
J3
1
2
GND2 3
5
SCL
ADDR1
ADDR2
ADDR3
ADDR4
ADDR5
ADDR6
ADDR7
ADDR8
ADDR9
ADDR10
ADDR11
ADDR12
ADDR13
ADDR14
ADDR15
C84
0.1U
GND
AT24C64S
4
L19
C101
47U
10V
7343
0.95U
+
L20
C92
0.1U
R91
10.0K
24
25
26
27
28
29
30
31
32
35
36
37
38
39
40
41
FLASHWR-L43
3
RD-L
22
I225
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
WE
CE
OE
FLASH
PWR
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
44
FLASHPWR
21
20
19
18
17
16
15
14
11
10
9
8
7
6
5
4
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
AD15
C86
0.1U
+
C104
47U
10V
7343
GND1 12
GND2 34
R130
221
SPEAKER DRIVER
VDD
-
4
-
ROMEN-L
I165
5
WR-L
1
4
2
I94
U40
3 TC7S32F
FLASHWR-L
U34
5
PORTSEL-L
4
6
74HC02S
Figure S-9
PIC and Speaker Schematic Diagram (Sheet 7 of 10)
035191
S-23
PICPWR
CR19
1N914S
I205
R129
10.0K
PWRIND-L
1
R94
4.75K
2
2N3906S
Q15
1
CR21
1N914S
3
VDD
I207
I206
ACIND_L
3
1
VREFVDD
PICPWR
R97
249
R90
10.0K
AC LED DRIVE CIRCUIT
PWR_BTN
RPWR_IND
RBATT_IND
BTN_4
BTN_1
VDD
R82
4.75K
2
2N3906S
Q12
AL_SIL_IND
1
3
I208
I209
R103
249
RP4
10K
1
2
3
4
RPWR_IND
R85
10.0K
8
7
6
5
3
RPSRCH_IND
BTN_2
BTN_5
BTN_3
RAL_SIL_IND
J5
1
2
3
4
5
6
7
8
9
10
11
12
13
CON_FLEX13
MEMBRANE PANEL CONNECTOR
RAL_SIL_IND
ALARM SILENCE INDICATOR DRIVE CKT
VDD
R83
4.75K
2
2N3906S
Q13
PSRCH_IND
1
3
I210
I211
R105
249
RPSRCH_IND
PULSE SEARCH IND DRIVE CKT
VDD
R84
4.75K
2
2N3906S
Q14
BATT_IND
1
3
I213
I212
R106
249
RBATT_IND
BATTERY IND DRIVE CKT
Figure S-10
Indicator Drive Schematic Diagram (Sheet 8 of 10)
035191
S-25
TP13
CR17
2
1
MAIN_OUT
VDD
1
1
CR24
1N914S
U33
MIC5200-5
I240
R112
20.0K
1
R135
100K
R139
100K
VDD
3
VDD
PICPWR
TP1
MAIN_DC1
MBRS330T3
C109
1U
35V
+
2
CR26
1
3
R115
10.0M
I215
OUT 3
IN
PICPWR
GND1 GND2
2
C108
10U
16V
+
4
C111
0.1U
R134
10.0K
1N914S
J6
+
I180
MAIN_OUT
4
3
2
1
R140
10.0K
R116
10.0M
R119
249K
BATT_CHECK
BATT
3
+
2
-
U35
LM393S I241
8
AC_OK-L
1
Sh 8
4
-
CON_4L_156
U35
LM393S
+
5
Q16
8
+
AC_OK
7
-
PICPWR
4
CR18
1N914S
3
1
VDD
TP38
2
R137
100K
PICPWR
Q16
R126
332K
I222
CR23
2
1
C112
0.1U
C107
470U
16V
TH
LOW to enable
VDD output
I219
3
CR25
1
1
Q18
2N3904S
R113
10.0M
R120
49.9K
PWR_CTRL
2
VDD
HIGH to turn ON
R121
10.0K
BAT54
R128
4.99K
5
I223
R107
200K
+
4
R127
100
0.22U
50V
MBRS330T3
VDD
2
CR22
VC1206
5.6V
C106
3
TH
2
2
+
1
Q17
2N7002S
1
I218
LM2940H
IN
OUT 3
G1 CS HS
3
R138
100K
2 BATT
C113
0.1U
4
Sh 9
I214
C119
0.1U
6
ACIND_L
GND
VDD TP39
U36
1
5
I232
R123
100K
SI9953
3
R114
127K
C114
0.1U
R125
100K
SI9953
3
8
I216
6
7
I217
1
To Linear Power Supply
Requires Heatsink NPB #891196
TP46
C115
1.0U
20V
VDD
U38
Critical at approx 5.68V
V_REF
R124
4.99K
+ LM393S
TP47
3
+
2
-
TP42
8
1
CRIT_BATT-L
4
Normally HIGH, active LOW
8
VDD
R108
6.81K
6
5
4
VDD
Low at approx 5.85V
U37
LT1009S
U38
LM393S
+
I220
R122
150K
5
+
6
-
R118
4.99K
TP43
8
7
4
LOW_BATT-L
Normally HIGH, active LOW
-
R136
10.0M
Figure S-11
Core Power Supply Schematic Diagram (9 of 10)
035191
S-27
NELLCOR PURITAN BENNETT
NPB-190 MAIN TOP SIDE
FAB 035190 REV A
NELLCOR PURITAN BENNETT
NPB-190 MAIN BOTTOM SIDE
TOP SIDE
BOTTOM SIDE
Figure S-12
Parts Locator Diagram for UIF PCB (10 of 10)
035192
S-29
VDD
+
C2
47U
10V
TH
U1
C1
19
0.1U
TH
18
J1
C3
1000P
TH
1
3
5
7
9
11
13
GND
TP1
DIG0
DIG1
DIG2
DIG3
DIG4
DIG5
DIG6
DIG7
R9
33.2K
TH
TP2 VDD
VDD
PWR
2
4
6
8
10
12
14
1
IICDATA
ISET
DIN
LEDEN
12
LOAD
IIC_SCK
13
CLOCK
SEGA
SEGB
SEGC
SEGD
SEGE
SEGF
SEGG
SEGDP
CON_7X2R235
9
4
GND1
GND2
DS2
DS1
DIG1
10
9
8
5
4
2
3
7
A
A
B F
C
D
E E
F
G
DP
G
D
A
B B
C
D
C E
F
G
DP
1 CA1
6
CA2
NKR141SC
10
9
8
5
4
2
3
7
10
9
8
5
4
2
3
7
DIG2
TH
DS3
A
A
B F
C
D
E E
F
G
DP
G
D
10
10
A
9
B B
C 8
D 5
4
C E
2
F
G 3
7
DP
1 CA1
6
CA2
NKR141SC
10
9
8
5
4
2
3
7
DIG3
TH
14
16
20
23
21
15
17
22
SEGA
SEGB
SEGC
SEGD
SEGE
SEGF
SEGG
SEGDP
TH
DS4
A
A
B F
C
D
E E
F
G
DP
DIG1
DIG2
DIG3
DIG4
DIG5
DIG6
DIG7
DIG8
DOUT 24
MAX7219
SEGA
SEGB
SEGC
SEGD
SEGE
SEGF
SEGG
SEGDP
2
11
6
7
3
10
5
8
10
10
A
9
B B
C 8
D 5
4
C E
2
F
G 3
DP 7
G
D
10
9
8
5
4
2
3
7
1 CA1
6
CA2
DIG4
NKR141SC
TH
10
A
B F
C
D
E E
F
G
DP
DS5
A
A
B
C
D
C E
F
G
DP
B
G
D
1 CA1
6
CA2
NKR141SC
10
9
8
5
4
2
3
7
10
9
8
5
4
2
3
7
DIG5
TH
DS6
A
A
B F
C
D
E E
F
G
DP
G
D
10
A
B B
C
D
C E
F
G
DP
10
9
8
5
4
2
3
7
10
9
8
5
4
2
3
7
1 CA1
6 CA2
DIG6
NKR141SC
NKR141SC
A
B
F
C
D
E
E
F
G
DP
1 CA1
6
CA2
TH
A
10
B
G
C
D
DP
TH
PULSE RATE
DS7
TH
1
20
2
19
SEGDP
3
18
SEGG
4
17
SEGF
5
16
SEGE
6
15
SEGD
7
14
SEGC
8
13
SEGB
9
12
SEGA
10
11
DIG8
DIG7
HDSP-4830
Figure S-13
Display PCB Schematic Diagram (1 of 2)
035195
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
LINE_IN
C1
220P
250V
TH
5
F2
8
8
EPS2PC3
TH
10
+
FAC2ASB TH
OB24-9
TH
NEUT_IN
R5
1.00K
C5
1/2W
15000U TH
35V
TH
3
R19
1.00K
2
To Fan
1
CON_2L
1
CR5
22V
SMCJ22C
AC-
R2
100M
TH
1/4W
Power Entry
C7
0.1U
3
R4
499
CR1
1N4702
15V
TH
2
4
1
13
12
2
4
3
6
J1
Q5
MPSA56
2
2
6
Fan Control
I11
1
3
230V
T1
E3490A
TH
I10
1
7
9
E
2
C6
0.01U
2ASB TH
4
R1
390K
1/2W
TH
SW1
FAC+
MAIN_DC
2
NEUTRAL
W3
18GA_BLU
115V1 1
15
Q1
TH
2N3904
HIGH CURRENT VIAS
3
C2
4700P
250V
TH
E
1
BR1
GBU8B
TH
1
W1
18GA _GRN/YEL
F1
T2
1
AC+
C3
220P
250V
TH
2
LINE
2
W2
18GA_BRN
CR2
22V
SMCJ22C
R23
10.0K
C8
0.01U
FAN_CTRL
DT1
600V
TH
+
R24
49.9
TH
35V
100U
C9
ESD Protection
1/4W TH
Main Board
E
BATT_CHK
MAIN_DC
R10
1.50
1/2W
TH
Battery Charge
C11
C4
100P
I5
R9
1.00K
TP1
R11
10.0K
0.1U
R21
73.2K
R12
10.0K
VREF
2
-
3
+
GND
TP2
8
3
3
1
R16
10.0K
4
+
I6
U3
VIN
GND
VOUT 2
5
+
6
-
8
7
8
FAN_CTRL
4
4
-
TH
Q6
2N7002S
1
U2
LM385S
I1
R3
10.0K
R14
10.0K
I12
R7
154K
3
I9
2
1
3
CR4
MBRS330T3
1N914S
CR6
3
Requires Heat Sink
Nellcor # 891196
CR7
1
C10
0.1U
4
3
2
LM35D
R20
10.0K
2
I8
I2
I3
Q2
IRF9510
TH
1
U1
LM358
22GA_BLK
R13
10.0K
1
R8
1.00K
22GA_ORN
W8
I4
2
U1
+ LM358
R22
10.0K
Q3
MPSA56
W9
22GA_RED
W6
BATT_OUT
CHG_IN
1
3
W7
22GA_WHT
MAIN_DC
1
SW2
MTS50B
TH
F3
CHG_OUT
BATT+
NC
R25
10.0M
2ASB TH
1N914S
I7
R6
100K
3
Q4
2N3904
TH 1
2
R15
49.9K
W4 Battery
22GA_RED
+
W5 Battery
22GA_BLK
-
BATT_CHK
R17
10.0K
035199
Figure S-15
Power Supply Schematic Diagram (1 of 2)
S-35
"N"
"GND"
NELLCOR PURITAN BENNETT
NPB-190 LPS TOP SIDE
"L"
"-"
"+"
035200
Figure S-16
Parts Locator Diagram for Power Supply PCB (2 of 2)
S-37