Download NPB-195 Service Manual - Frank`s Hospital Workshop

SERVICE MANUAL
NPB-295 Pulse Oximeter
Caution: Federal law (U.S.) restricts this device to sale by or on the order of a physician.
To contact Mallinckrodt, Inc. representative: In the United States, call 1-800-635-5267; outside the United States,
call your local Mallinckrodt representative.
© 2002 Mallinckrodt Incorporated. All rights reserved. 061097C-1202
0123
Nellcor Puritan Bennett Inc.
4280 Hacienda Drive
Pleasanton, CA 94588 USA
Telephone Toll Free 1.800.NELLCOR
Mallinckrodt Europe BV
Hambakenwetering 1
5231 DD”s-Hertogenbosch
The Netherlands
Telephone +31.73.648.5200
Nellcor Puritan Bennett Inc. is a wholly owned subsidiary 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.
Nellcor Puritan Bennett, Nellcor, Durasensor, and Oxisensor II, are trademarks of Mallinckrodt Incorporated.
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; 4,653,498;
5,078,136; 5,351,685; 5,368,026; 5,533,507; and 5,662,106.
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-295 Pulse Oximeter Description ..........................................
1.3
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: Power-On Settings And Service Functions ...........................
4.1
Introduction ..................................................................................
4.2
Power-On Settings ......................................................................
4.3
Service Functions ........................................................................
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
Cooling Fan Removal/Installation................................................
6.10 Display Pcb Removal/Installation ................................................
6.11 Uif Pcb Removal/Installation........................................................
6.12 Alarm Speaker Removal/Installation ...........................................
Section 7: Spare Parts ............................................................................
7.1
Introduction ..................................................................................
Section 8: Packing For Shipment............................................................
iii
v
vi
1-1
1-1
1-1
1-3
2-1
2-1
2-1
2-1
3-1
3-1
3-1
3-1
3-9
4-1
4-1
4-1
4-2
5-1
5-1
5-1
5-1
5-1
5-1
5-2
5-7
6-1
6-1
6-1
6-2
6-3
6-4
6-5
6-6
6-7
6-9
6-10
6-11
6-13
7-1
7-1
8-1
iii
Table of Contents
11.10
iv
8.1
General Instructions.....................................................................
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.................................................................................
Section 10: Serial Port Interface Protocol ...............................................
10.1 Introduction ..................................................................................
10.2 Configuring The Data Port ...........................................................
10.3 Connecting To The Data Port ......................................................
10.4 Real-Time Printout .......................................................................
10.5 Trend Data Printout......................................................................
10.6 Nurse Call ....................................................................................
10.7 Analog Output ..............................................................................
Section 11: Technical Supplement..........................................................
11.1 Introduction ..................................................................................
11.2 Oximetry Overview.......................................................................
11.3 Circuit Analysis.............................................................................
11.4 Functional Overview ....................................................................
11.5 Ac Input ........................................................................................
11.6 Power Supply Pcb Theory Of Operation......................................
11.7 Battery ..........................................................................................
11.8 User Interface Pcb (Uif) ...............................................................
11.9 Front Panel Display Pcb And Controls ........................................
Schematic Diagrams .....................................................................................
8-1
8-1
8-3
9-1
9-1
9-1
9-1
9-1
9-2
9-2
9-2
10-1
10-1
10-1
10-2
10-3
10-6
10-6
10-7
11-1
11-1
11-1
11-2
11-2
11-3
11-3
11-4
11-5
11-8
11-9
Table of Contents
LIST OF FIGURES
Figure 1-1: NPB-295 Front Panel ............................................................... 1-1
Figure 1-2: User Softkey Map ..................................................................... 1-2
Figure 1-3: NPB-295 Rear Panel................................................................ 1-3
Figure 3-1: NPB-295 Controls .................................................................... 3-2
Figure 3-2: Self-Test Display ...................................................................... 3-2
Figure 3-3: Adjusting %SpO2 Upper Alarm Limit ....................................... 3-3
Figure 3-4: Adjusting % SpO2 Lower Alarm Limit ...................................... 3-3
Figure 3-5: Adjusting High Pulse Rate Alarm ............................................. 3-4
Figure 3-6: Adjusting Low Pulse Rate Alarm .............................................. 3-4
Figure 4-1: Service Function Softkeys........................................................ 4-2
Figure 4-2: Service Function Softkey Map.................................................. 4-3
Figure 4-3: Param Softkeys ........................................................................ 4-3
Figure 4-4: Print Softkeys ........................................................................... 4-4
Figure 4-5: Trend Printout........................................................................... 4-5
Figure 4-6: Errlog Printout........................................................................... 4-5
Figure 4-7: Instat Printout ........................................................................... 4-6
Figure 4-8: INFO Printout............................................................................ 4-6
Figure 4-9: Next Softkeys ........................................................................... 4-7
Figure 4-10: Alarms Softkeys ..................................................................... 4-7
Figure 6-1: Fuse Removal .......................................................................... 6-2
Figure 6-2: NPB-295 Corner Screws .......................................................... 6-3
Figure 6-3: Separating Case Halves........................................................... 6-4
Figure 6-4: NPB-295 Battery....................................................................... 6-5
Figure 6-5: Power Entry Module ................................................................. 6-6
Figure 6-6: Power Supply ........................................................................... 6-7
Figure 6-7: Cooling Fan .............................................................................. 6-9
Figure 6-8: Display PCB ........................................................................... 6-10
Figure 6-9: UIF PCB ................................................................................. 6-12
Figure 6-10: Alarm Speaker...................................................................... 6-13
Figure 7-1: NPB-295 Expanded View......................................................... 7-2
Figure 8-1: Repacking the NPB-295........................................................... 8-2
Figure 10-1: Data Port Softkeys ............................................................... 10-1
Figure 10-2: Data Port Pin Layout ............................................................ 10-3
Figure 10-3: Real-Time Printout ............................................................... 10-4
Figure 10-4: Trend Data Printout .............................................................. 10-6
Figure 11-1: Oxyhemoglobin Dissociation Curve ..................................... 11-2
Figure 11-2: NPB-295 Functional Block Diagram..................................... 11-3
Figure 11-3: UIF PCB Front End Red/IR Schematic Diagram ............... 11-11
Figure 11-4: Analog Front End Schematic Diagram............................... 11-13
Figure 11-5: Front End Power Supply Schematic Diagram.................... 11-15
Figure 11-6: SIP/SOP Interface Schematic Diagram ............................. 11-17
Figure 11-7: Data Port Drivers Schematic Diagram ............................... 11-19
Figure 11-8: CPU Core Schematic Diagram A ....................................... 11-21
Figure 11-9: CPU Memory Schematic Diagram B.................................. 11-23
Figure 11-10: Contrast and Sound Schematic Diagram A ..................... 11-25
Figure 11-11: UIF PCB Power Supply Schematic Diagram B ................ 11-27
Figure 11-12: Display Interface Schematic Diagram .............................. 11-29
Figure 11-13: UIF PCB Parts Locator Diagram ...................................... 11-31
Figure 11-14: Power Supply Schematic Diagram................................... 11-33
v
Table of Contents
Figure 11-15: Power Supply Parts Locator Diagram ..............................11-33
LIST OF TABLES
Table 3-1:
Table 3-2:
Table 3-3:
Table 3-4:
Table 3-5:
Dynamic Operating Range....................................................... 3-7
Earth Leakage Current Limits ................................................ 3-10
Enclosure Leakage Current Limits......................................... 3-11
Patient Leakage Current Limits.............................................. 3-12
Patient Leakage Current Test Configurations Mains Voltage on the Applied Part ....................................... 3-12
Table 4-1: Factory Default Settings........................................................... 4-2
Table 5-1: Problem Categories ................................................................. 5-2
Table 5-2: Power Problems....................................................................... 5-3
Table 5-3: Button Problems....................................................................... 5-4
Table 5-4: Display/Alarms Problems......................................................... 5-4
Table 5-5: Operational Performance Problems ........................................ 5-5
Table 5-6: Serial Port Problems ................................................................ 5-6
Table 5-7: Error Codes.............................................................................. 5-7
Table 6-1: Power Supply Leads Connections ........................................... 6-8
Table 7-1: Parts List .................................................................................. 7-1
Table 9-1: Default Settings........................................................................ 9-2
Table 10-1: Data Port Pin Outs ............................................................... 10-3
Table 10-2: Status Codes........................................................................10-6
Table 10-3: Nurse Call Relay Pin States................................................. 10-7
Table 10-4: Rating of Nurse Call Relay................................................... 10-7
vi
SECTION 1: INTRODUCTION
1.1
1.2
1.3
1.1
Manual Overview
NPB-295 Pulse Oximeter Description
Related Documents
MANUAL OVERVIEW
This manual contains information for servicing the Nellcor model NPB-295 pulse
oximeter. Only qualified service personnel should service this product. Before
servicing the NPB-295, read the operator’s manual carefully for a thorough
understanding of operation.
Warning: Explosion hazard. Do not use the NPB-295 pulse oximeter in the
presence of flammable anesthetics.
1.2
NPB-295 PULSE OXIMETER DESCRIPTION
The NPB-295 is a portable pulse oximeter intended for use as a continuous
noninvasive monitor of arterial oxygen saturation (SpO2) and pulse rate.
It can be used on adult, pediatric and neonatal patients. Oxygen saturation and pulse
rate are displayed digitally along with a plethysmographic waveform or a 10-segment
blip bar that indicates pulse intensity. This monitor is intended for use in hospital
and hospital-type facilities, during intra-hospital transport, and in home
environments.
Through the use of the four softkeys, the operator can access trend information, select
an alarm limit to be changed, choose the language to be used, adjust the internal time
clock, and change communications protocol. The NPB-295 can operate on AC
power or on an internal battery. The controls and indicators for the NPB-295 are
illustrated in Figures 1-1 through 1-3.
1
2 3 4
5
6
7
8
9
11
10
NPB-295
%SP02
BPM
LIMITS
17
16 15 14
TREND
SETUP
13
1. SpO2 Sensor Port
2. Low Battery Indicator
3. Power On/Off Button
4. AC/Battery Charging Indicator
5. Waveform Display
6. %SpO2 Indicator
7. Pulse Beats Per Minute display
8. Alarm Silence Indicator
9. Alarm Silence Button
100
110
LIGHT
12
10. Adjust Up Button
11. Adjust Down Button
12. Contrast Button
13. Softkeys
14. Menu Bar
15. Motion Indicator
16. Pulse Search Indicator
17. Speaker
Figure 1-1: NPB-295 Front Panel
1-1
Section 1: Introduction
Figure 1-2 illustrates the various functions that are available through the use of the
softkeys, and how to access them. A complete explanation of the keys is provided in
the NPB-295 operator's manual.
BPM
TREND
LIMITS
SETUP
Normal
Display Mode
95
65
%SPO2
LIGHT
LCD display
backlight ON or OFF
EXIT
SELECT
Select alarm limit
to be adjusted
Return to
main display
VIEW
CLOCK
EXIT
NEXT
COMM
BLIP
PLETH
VIEW
EXIT
NEXT
ZOOM
DUAL
SPO2
PULSE
Display
SpO2 Data
Display
pulse trend
data
VIEW
NEXT
NEXT
EXIT
NCALL ANALOG
NEXT
Select
Language
Norm + or
Norm -
EXIT
0 Volt, 1 Volt,
or Step
Return to
main display
Select data from last
12/30 min. or last 1,
2, 4, 8, 12, or 24 hrs.
Display both
SpO2 and
pulse trend
data
LANG
Adjust baud rate
and protocol
SET
EXIT
HIST
SELECT
EXIT
EXIT
Return to
main display
DELETE
PRINT
Print trends
YES
Deletes all
trend info
NEXT
EXIT
Returns to
prior menu
Return to
main display
NO
Return to prior
trend menu
Figure 1-2: User Softkey Map
1-2
EXIT
Section 1: Introduction
1
2
3
TM
2X
T 0.50A 250V
R
IPX1
NRTL/C
5
1. Equipotential (ground) Terminal
2. AC Inlet
3. DB-15 Interface Connector (Data Port)
MADE IN U.S.A.
NELLCOR PURITAN BENNETT EUROPE BV,
's-HERTOGENBOSCH, THE NETHERLANDS
CISPR 11
Group 1
Class B
012 3
NPB-295
SN
NELLCOR PURITAN BENNETT, INC.
PLEASANTON, CA 94588, U.S.A.
100-120 V 200-240 V
50/60 Hz 20VA
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
4. Fuse Receptacle
5. Voltage Selection Switch
Figure 1-3: NPB-295 Rear Panel
1.3
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-295 operator’s manual. To understand the various
Nellcor sensors that work with the monitor, refer to the individual sensor’s directions
for use.
1-3
(Blank Page)
SECTION 2: ROUTINE MAINTENANCE
2.1
2.2
2.3
2.1
Cleaning
Periodic Safety and Functional Checks
Battery
CLEANING
Caution: Do not immerse the NPB-295 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-295, 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 each sensor's directions for use.
2.2
PERIODIC SAFETY AND FUNCTIONAL CHECKS
The NPB-295 requires no calibration.
The battery should be replaced every 2 years. See Battery Replacement on 6-5.
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-295 for damage.
2.
Inspect safety labels for legibility. If the labels are not legible, contact
Mallinckrodt Technical Services Department or your local Mallinckrodt
representative.
3.
Verify 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 the NPB-295. Contact
Mallinckrodt Technical Services Department or your local Mallinckrodt
representative.
5.
Inspect the fuses for proper value and rating (F1 & F2 = 0.5 amp slow blow).
BATTERY
Mallinckrodt recommends replacing the instrument's battery every 2 years. When the
NPB-295 is going to be stored for 3 months or more, remove the battery prior to
storage. To replace or remove the battery, refer to Section 6, Disassembly Guide.
If the NPB-295 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 with the
monitor in standby, or 18 hours if it is in use, to receive a full charge. The battery is
being charged whenever the instrument is plugged into AC.
2-1
(Blank Page)
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-295 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-295 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
3.3
EQUIPMENT NEEDED
Equipment
Description
Digital multimeter (DMM)
Fluke Model 87 or equivalent
Durasensor 
oxygen transducer
DS-100A
Oxisensor  II
oxygen transducer
D-25
Pulse oximeter tester
SRC-2
Safety analyzer
Must meet current AAMI ES1/1993
& IEC 601-1/1998 specifications
Sensor extension cable
SCP-10 or MC-10
Serial interface cable
EIA-232 cable (optional)
Stopwatch
Manual or electronic
PERFORMANCE TESTS
The battery charge procedure should be performed before monitor repairs whenever
possible.
Note:
3.3.1
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 restored using the configuration mode procedure
described in paragraph 4.3.3.
Battery Charge
Perform the following procedure to fully charge the battery.
1.
Connect the monitor to an AC power source.
2.
Verify the monitor is off and that the AC Power/Battery Charging indicator is
lit.
3-1
Section 3: Performance Verification
3.
3.3.2
Charge the battery for at least 14 hours in standby.
Power-up Performance
The power-up performance tests (3.3.2.1 through 3.3.2.2) verify the following
monitor functions:
•
Power-On Self-Test
•
Power-On Defaults and Alarm Limit Ranges
Power On/Off
Alarm Silence
NPB-295
%SP02
BPM
LIMITS
TREND
SETUP
100
110
LIGHT
Softkeys
Contrast Adjust Adjust
Down Up
Figure 3-1: NPB-295 Controls
3.3.2.1
Power-On Self-Test
1.
Connect the monitor to an AC power source and verify 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/Off button. The monitor must perform the following sequence.
a.
Within 2 seconds all LEDs are illuminated, then all pixels on the LCD
display are illuminated, after which the backlight comes on.
b.
The indicators remain lighted.
c.
The LCD display shows the Nellcor Puritan Bennett logo and the
software version of the NPB-295 (Figure 3-2).
NPB-295
Nellcor
Puritan
Bennett
NPB-295 Version 1.1.0.5
Figure 3-2: Self-Test Display
3-2
Section 3: Performance Verification
3.3.2.2
d.
A 1-second beep sound indicating proper operation of the speaker, and
all indicators turn off except the AC Power/Battery Charging
indicators.
e.
The NPB-295 begins normal operation.
Power-On Defaults and Alarm Limit Ranges
Note:
When observing or changing default limits, a 10-second time-out is in effect.
If no action is taken within 10 seconds, the monitor automatically returns to
the monitoring display.
Note:
The descriptions that follow are based on the assumption that Pleth is the
view that has been selected. The steps to change an alarm limit are the same
if the view being used is Blip.
1.
Ensure that the monitor is on. Press and release the Limits softkey. Verify the
monitor emits a single beep and the plethysmograph waveform is replaced
with a display of the alarm limits. The high alarm limit for %SpO2 will
indicate an alarm limit of “100” inside a box (Figure 3.3).
NPB-295
ALARM LIMITS
BPM
SPO2
170
100
UPPER
85
LOWER
40
SELECT
%SP02
BPM
100
110
EXIT
Figure 3-3: Adjusting %SpO2 Upper Alarm Limit
2.
Note:
3.
Press the Limits softkey. Press and hold the Down Arrow button. Verify the
boxed number for %SpO2 upper alarm limit reduces to a minimum of “85.”
A decimal point in the display indicates that the alarm limits have been
changed from factory default values.
Press the SELECT softkey. Verify the monitor emits a single beep and the
box moves to the %SpO2 lower alarm limit of “85”.
NPB-295
ALARM LIMITS
BPM
SPO2
170
100
85
40
UPPER
LOWER
SEL
%SP02
BPM
100
110
EXIT
Figure 3-4: Adjusting % SpO2 Lower Alarm Limit
4.
Press and hold the Down Arrow button and verify the %SpO2 lower alarm
limit display reduces to a minimum of “20”.
5.
Press and hold the Up Arrow button and verify the %SpO2 lower alarm limit
display cannot be raised past the upper alarm limit setting of “85”.
6.
Press the Exit button.
3-3
Section 3: Performance Verification
7.
Press the Limits softkey then press the SELECT softkey two times Verify the
monitor emits a beep after each keystroke. The Pulse upper alarm limit should
be “170” and should be boxed.
NPB-295
ALARM LIMITS
BPM
SPO2
170
100
85
40
UPPER
LOWER
SEL
%SP02
BPM
100
110
EXIT
Figure 3-5: Adjusting High Pulse Rate Alarm
8.
Press and hold the Down Arrow button. Verify the minimum displayed value
is “40” for the Pulse upper alarm limit.
9.
Press the exit button.
10.
Press the Limits softkey then press the SELECT softkey three times. Verify
the Pulse lower alarm limit display indicates an alarm limit of “40” and is
boxed.
NPB-295
ALARM LIMITS
SPO2
BPM
170
100
UPPER
85
LOWER
40
SEL
%SP02
BPM
100
110
EXIT
Figure 3-6: Adjusting Low Pulse Rate Alarm
3-4
11.
Press and hold the Down Arrow button. Verify the boxed Pulse lower alarm
limit display reduces to a minimum of “30”.
12.
Press and hold the Up Arrow button and verify the boxed Pulse lower alarm
limit display cannot be adjusted above the Pulse high limit of “40”.
13.
Press the Power On/Off button to turn the monitor off.
14.
Press the Power On/Off button to turn the NPB-295 back on.
15.
Press and release the Limits softkey. Verify the %SpO2 upper alarm limit
display is boxed and indicates an alarm limit of “100”.
16.
Press the SELECT softkey. Verify the %SpO2 lower alarm limit display is
boxed and indicates an alarm limit of “85”.
17.
Press the SELECT softkey a second time. Verify the Pulse upper alarm limit
display is boxed and indicates an alarm limit of “170”.
18.
Press the SELECT softkey a third time. Verify the Pulse lower alarm limit
display is boxed and indicates an alarm limit of “40”.
19.
Press the Power On/Off button to turn the monitor off.
Section 3: Performance Verification
3.3.3
Hardware and Software Tests
Hardware and software testing includes 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
•
Analog Output
•
Operation on Battery
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
POSITION
38
LOW
OFF
RCAL 63/LOCAL
2.
Press the Power On/Off button to turn the monitor on. After the normal
power-up sequence, press the following softkeys; Setup, View, and Pleth.
Verify the %SpO2 and Pulse initially indicates zeroes.
3.
Move the modulation switch on the SRC-2 to LOW.
4.
Verify the following monitor reactions:
a.
The plethysmograph waveform 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 displays.
d.
After about 10 to 20 seconds, the monitor displays saturation and pulse
rate as specified by the tester. Verify 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 displays flash,
indicating 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.
3-5
Section 3: Performance Verification
3.3.3.1.2
6.
Verify the %SpO2 display indicates “60” and the Pulse display indicates
“SEC” while the Alarm Silence button is pressed.
7.
When the button is released the alarm is silenced.
8.
With the alarm silenced, verify the following:
a.
The alarm remains silenced.
b.
The Audible Silence indicator lights.
c.
The %SpO2 and Pulse displays continue to flash.
d.
The pulse tone is still audible.
e.
The audible alarm returns in approximately 60 seconds.
9.
While pressing the Alarm Silence button, press the Down Arrow button until
the Pulse display indicates “30”.
10.
Press the Up Arrow button and verify the displays indicate 60 SEC, 90 SEC,
120 SEC, and OFF. Release the button when the display indicates “OFF”.
11.
Press and release the Alarm Silence button. Verify the Alarm Silence
Indicator flashes.
12.
Wait approximately 3 minutes. Verify the alarm does not return.
13.
After 3 minutes, the alarm silence reminder beeps three times, and will
continue to do so at approximately 3-minute intervals.
Alarm Volume Control
After completing the procedure in paragraph 3.3.3.1.1:
1.
3-6
Press and hold the Alarm Silence button and 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”
•
the Pulse display indicates the default setting of 5.
2.
While still pressing the Alarm Silence button, press the Down Arrow button
until an alarm volume setting of 1 is displayed.
3.
Verify the volume of the alarm has decreased but is still audible.
4.
Continue pressing the Alarm Silence button and press the Up Arrow button to
increase the alarm volume setting to a maximum value of 10.
5.
Verify the volume increases. Press the Down Arrow button until a
comfortable audio level is attained.
6.
Release the Alarm Silence button. The tone stops.
Section 3: Performance Verification
3.3.3.1.3
3.3.3.1.4
Pulse Tone Volume Control
1.
Press the Up Arrow button and verify the beeping pulse tone sound level
increases.
2.
Press the Down Arrow button and verify the beeping pulse tone decreases until
it is no longer audible.
3.
Press the Up Arrow 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 SCP-10 or MC-10, which is connected to the NPB295, and turn the NPB-295 on.
2.
Place the SRC-2 in the RCAL 63/LOCAL mode.
3.
Set the SRC-2 as indicated in Table 3-1.
Note:
An “*” indicates values that produce an alarm. Press the Alarm Silence
button to silence the alarm.
Table 3-1: Dynamic Operating Range
SRC-2 Settings
RATE
MODULATION
SpO2
Pulse Rate
38
HIGH2
LOW
79 - 83*
35 - 41*
112
HIGH1
HIGH
79 - 83*
109 - 115
201
LOW
LOW
79 - 83*
198 - 204*
201
LOW
HIGH
79 - 83*
198 - 204*
Note:
4.
3.3.3.1.5
LIGHT
NPB-295 Indications
Allow the monitor several seconds to stabilize the readings.
Verify the NPB-295 readings are within the indicated tolerances.
Nurse Call
Note:
The Nurse Call tests must be performed with the instrument operating on AC
power.
1.
Connect the negative lead of a voltmeter to pin 5 and positive to pin 11 of the
data port on the back of the instrument (Figure A-2 in Appendix). Ensure that
the audible alarm is not silenced or turned off.
2.
Set the SRC-2 to create an alarm condition.
3.
Verify an output voltage at pins 5 and 11 between +5 and +12 volts DC.
4.
Press the Alarm Silence button. With no active audible alarm, the output
voltage at pins 5 and 11 must be between -5 and -12 volts DC.
5.
With the instrument in an alarm condition, use a DVM to verify there is no
continuity between pins 8 and 15 and that there is continuity between pins 7
and 15.
3-7
Section 3: Performance Verification
6.
3.3.3.1.6
Adjust the alarm limits so that there is no alarm condition. Use a DVM to
verify there is continuity between pins 8 and 15 and that there is no continuity
between pins 7 and 15.
Analog Output
Note:
1.
Connect the negative lead of a voltmeter to pin 10 and positive to pin 6 of the
data port on the back of the instrument (Figure A-1 in Appendix).
2.
Press the following softkeys: Setup, Next, Next, and Analog. Press the 1-volt
softkey.
3.
Verify the output voltage is 1.0 ± 0.025 volts DC.
4.
Leave the negative lead connected to pin 10 and verify 1.0 ± 0.025 volts DC
on pins 13 and 14.
Note:
Move the positive lead back to pin 6.
6.
Press the following softkeys; Setup, Next, Next, and Analog. Press the 0-volt
softkey.
7.
Verify the output voltage is 0.0 ± 0.025 volts DC.
8.
Leave the negative lead connected to pin 10 and verify 0.0 ± 0.025 volts DC
on pins 13 and 14.
9.
If step 8 takes more than 2 minutes to complete, the analog output will time
out. Repeat step 2 to initiate the analog output.
Disconnect the voltmeter from the instrument.
Operation on Battery Power
1.
With the instrument operating on AC, turn on the backlight.
2.
Disconnect the instrument from AC and verify the AC/Battery Charging
indicator and the backlight turn off.
3.
Verify the instrument continues monitoring normally and that the low battery
indicator is not lit.
Note:
4.
3.3.3.2
If step 4 takes more than 2 minutes to complete, the analog output will time
out. Repeat step 2 to initiate the analog output.
5.
Note:
3.3.3.1.7
The Analog Output tests must be performed with the instrument operating on
AC power.
If the low battery indicator is illuminated, perform the procedure outlined in
step 3.3.1.
Connect the instrument to AC and verify the backlight and AC/Battery
Charging indicator turn on and that the instrument is monitoring normally.
General Operation
The following tests are an overall performance check of the system:
3-8
•
3.3.3.2.1
LED Excitation Test
•
3.3.3.2.2
Operation with a Live Subject
Section 3: Performance Verification
3.3.3.2.1
LED Excitation Test
This procedure uses normal system components to test circuit operation. A Nellcor
Oxisensor  II 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.
3.3.3.2.2
1.
Connect the monitor to an AC power source.
2.
Connect an SCP-10 or MC-10 sensor input cable to the monitor.
3.
Connect a D-25 sensor to the sensor-input cable.
4.
Press the Power On/Off 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 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 optical sensor, 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-295 off.
Operation with a Live Subject
Patient monitoring 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 SCP-10 or MC-10 sensor input cable to the monitor.
3.
Connect a Nellcor Durasensor  oxygen transducer, model DS-100A, to the
sensor input cable.
4.
Clip the DS-100A to the subject as recommended in the sensor's directions for
use.
5.
Press the Power On/Off button to turn the monitor on and verify the monitor is
operating.
6.
The monitor should stabilize on the subject's physiological signal in about 15
to 30 seconds.
7.
Verify the oxygen saturation and pulse rate values are reasonable for the
subject.
SAFETY TESTS
NPB-295 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
3-9
Section 3: Performance Verification
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).
3.4.1
•
Ground Integrity
•
Electrical Leakage
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 <6 volts RMS,
50 or 60 Hz, and 25 A.
3.4.2
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.
3.
Verify the analyzer indicates 100 milliohms or less.
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 volts
AC 60 Hz, for IEC 601-1 the voltage is 264 volts AC, 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
3-10
LINE
CORD
NEUTRAL
CORD
LEAKAGE
CURRENT
Normal
Closed
Closed
500 µA
Reversed
Closed
Closed
500 µA
Normal
Open
Closed
1000 µA
Normal
Closed
Open
1000 µA
Section 3: Performance Verification
3.4.2.2
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 AAMI/ANSI is
120 volts AC, 60 Hz, and for IEC 601-1 the applied voltage is 264 volts AC, 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 piece of 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.
3.
Measure the leakage current between the foil and earth.
Note:
The analyzer leakage indication must not exceed values listed in Table 3-3.
Table 3-3: Enclosure Leakage Current Limits
AC LINE
CORD
3.4.2.3
NEUTRAL
LINE
CORD
POWER
LINE
GROUND
CABLE
IEC 601-1
AAMI/ANSI
ES1
STANDARD
Closed
Closed
Closed
100 µA
100 µA
Closed
Closed
Open
500 µA
300 µA
Closed
Open
Closed
500 µA
300 µA
Open
Closed
Closed
500 µA
100 µA
Open
Open
Closed
500 µA
300 µA
Open
Closed
Open
500 µA
300 µA
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 volts AC, 60 Hz, and for IEC 601-1 the applied voltage is 264
volts AC, 50 to 60 Hz.
1.
2.
Configure the electrical safety analyzer as follows:
Function:
Patient Leakage
Range:
µA
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
3.4.2.4
IEC 601-1
AAMI/ANSI
ES1
STANDARD
AC LINE
POLARITY
NEUTRAL
LINE
POWER
LINE
GROUND
CABLE
Normal
Closed
Closed
100 µA
10 µA
Normal
Open
Closed
500 µA
50 µA
Normal
Closed
Open
500 µA
50 µA
Reverse
Closed
Closed
100 µA
10 µA
Reverse
Open
Closed
500 µA
50 µA
Reverse
Closed
Open
500 µA
50 µA
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 volts AC, 60 Hz,
and for IEC 601-1 the applied voltage is 264 volts AC, 50 to 60 Hz.
Warning: AC mains voltage will be present on the patient cable terminals
during this test. Exercise caution to avoid electrical shock hazard.
1.
2.
Configure the electrical safety analyzer as follows:
Function:
Patient Leakage (Mains on Applied Part)
Range:
µA
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 Table 3-5.
Table 3-5: Patient Leakage Current Test Configurations Mains Voltage on the Applied Part
AC LINE
POLARITY
3-12
NEUTRAL
LINE
POWER
LINE
GROUND
CABLE
IEC 601-1
AAMI/ANSI
ES1
STANDARD
Normal
Closed
Closed
5 mA
50 µA
Reverse
Closed
Closed
5 mA
50 µA
SECTION 4: POWER-ON SETTINGS AND SERVICE FUNCTIONS
4.1
4.2
4.3
4.1
Introduction
Power-on Settings
Service Functions
INTRODUCTION
This section discusses how to reconfigure power-on default values, and access the
service functions.
4.2
POWER-ON SETTINGS
The following paragraphs describe how to change power-on default settings.
Through the use of softkeys shown in Figure 1-2, the user can change:
•
alarm limits
•
type of display
•
baud rate
•
time and date
•
trends to view
A decimal point is added to the right of a display when the alarm limit for that
display has been changed to a value that is not a power-on default value. If the new
value is saved as a power on default value, the decimal point will be removed. By
using the service functions, changes can be saved as power-on default values.
Some values cannot be saved as power-on default values. A SpO2 Low limit less
than 80 will not be saved as a power-on default. Audible Alarm Off will not be
accepted as a power-on default. An attempt to save either of these values as default
will result in an invalid tone. Both values can be selected for the current patient, but
they will be lost when the instrument is turned off.
4.2.1
Factory Default Settings
Factory power-on default settings for the NPB-295 are listed in Table 4-1. Following
the procedures listed in the paragraphs that follow can change these settings.
4-1
Section 4: Power-On Settings and Service Functions
Table 4-1: Factory Default Settings
Parameter
4.3
4.3.1
Default Value
SpO2 High
100%
SpO2 Low
85%
Pulse Rate High
170 bpm
Pulse Rate Low
40 bpm
Alarm Volume
Level 5
Alarm Silence Duration
60 seconds
Alarm Silence Restriction
Sound Reminder
Pulse Beep Volume
Level 4
Data Port Mode
ASCII
Baud Rate
9600
Display
Pleth
Trend
Saturation
Contrast
Mid-range
Language
English
Nurse Call Polarity
Positive (NCALL+)
SERVICE FUNCTIONS
Introduction
These functions can be used to select institutional defaults, and to access information
about the patient or instrument. A Mallinckrodt Customer Service Engineer should
only access some of the items available through the service functions. These
functions will be noted in the text.
4.3.2
Accessing the Service Functions
The sensor cable must be disconnected from the instrument to access service
functions. Simultaneously press the 4th softkey from the left and the contrast button
for more than 3 seconds. The menu bar will change to the headings listed in Figure
4-1.
Note:
If a “Sensor Disconnected” prompt appears on the screen, press the Alarm
Silence button and repeat the above procedure.
Note:
If the above steps are performed with a sensor cable connected, only the
Param and Exit softkeys appear on the screen.
NPB-295
%SP02
BPM
PARAM
PRINT
NEXT
-----
EXIT
Figure 4-1: Service Function Softkeys
4-2
Section 4: Power-On Settings and Service Functions
Figure 4-2 can be used as a quick reference showing how to reach different softkey
functions. Items reached through the Param softkey can be accessed during normal
operation. Functions provided by the Print and Next softkeys cannot be accessed
when a sensor cable is connected to the instrument. Each of the various functions is
described in the text to follow.
Param
Paragraph 4.3.2.2
Yes
Paragraph 4.3.2.3
Exit
Save
Reset
Next
Print
Trend
Exit
Paragraph 4.3.2.1
and 4.3.2.4
Errlog
Paragraph 4.3.2.1
Instat
Contrast
Info
No
Yes
No
Next
Alarms
Downld
Exit
Exit
SELECT
Figure 4-2: Service Function Softkey Map
4.3.2.1
Exit & Next Softkeys
NEXT
There are not enough buttons to display all of the options that are available at some
levels of the menu. Pressing the Next button allows you to view additional options
available at a given menu level.
EXIT
To back up one menu level, press the Exit button. The service functions can be
exited by repeatedly pressing the Exit button.
4.3.2.2
Param
When the Param softkey is pressed, the function of the softkeys changes as shown in
figure 4-3. These options can be accessed without disconnecting the sensor cable
from the instrument.
NPB-295
%SP02
BPM
RESET
SAVE
-----
EXIT
Figure 4-3: Param Softkeys
4-3
Section 4: Power-On Settings and Service Functions
RESET
The Reset button is used to return to the factory default settings. If Yes is pressed,
the instrument sounds three tones and the settings return to factory default values.
When No is pressed, there are no changes made to the settings stored in memory.
SAVE
When adjustable values are changed from factory default, the Save button can be
used to preserve the settings as institutional power-on default values. Pressing Yes
stores the current settings in memory. The instrument sounds three tones indicating
that the changes have been saved as power-on default values. The new saved values
will continue to be used through power-on and off cycles until they are changed and
saved again, or until they are reset. If No is pressed, the changed values will not be
saved.
Note:
4.3.2.3
An invalid tone indicates a parameter value cannot be saved as a power on
default (refer to paragraph 4.2). Along with the invalid tone, a message will
be displayed indicating which parameter could not be saved as a power-on
default.
Print
PRINT
Accessing the Print softkey makes four printouts available. Refer to the Appendix
for information about how to make connections to the data port and how data is
presented in a printout. The appropriate printout can be selected by pressing the
corresponding softkey. Figure 4-4 represents the softkey configuration after the Print
softkey has been selected.
Up to 24 hours of trend data can be viewed on the printouts described below. When
the instrument is turned on, trend data is recorded every 2 seconds. As an example,
an instrument that is used 6 hours a week would take approximately 4 weeks to fill its
memory. . The 24 hours of stored trend data is available for downloading to Score
software for 45 days. There are no limitations for displaying or printing data.
Note: The two-letter codes and the symbols that occur in the printout are described
in Table 10-3.
NPB-295
%SP02
BPM
TREND ERRLOG INSTAT
-----
INFO
Figure 4-4: Print Softkeys
4-4
Section 4: Power-On Settings and Service Functions
TREND
A Trend printout will include all data recorded for up to 24 hours of monitoring since
the last Delete Trends was performed. A new trend point is recorded every 2
seconds. Figure 4-5 is an example of a Trend printout.
NPB-295 Version 1.0.0.000
TIME
01-Jul-97 14:00:00
01-Jul-97 14:00:05
01-Jul-97 14:00:10
01-Jul-97 14:00:15
01-Jul-97 18:00:43
01-Jul-97 18:00:48
NPB-295 Version 1.0.0.000
Time
01-Jul-97 18:00:53
01-Jul-97 18:00:58
01-Jul-97 18:01:03
01-Jul-97 18:01:08
01-Jul-97 18:01:13
Output Complete
TREND
SpO2 Limit: 30-100%
PR (bpm)
PA
120
220
124
220
190
220
190
220
--------Trend
SpO2 Limit: 80-100%
%SpO2
PR (bpm)
PA
------------98
100
140
98
181*
190
99
122
232
PR Limit: 100-180 bpm
%SpO2
100
100
100
100
-----
PR Limit: 60-180 bpm
Figure 4-5: Trend Printout
The first two lines are the column heading lines. The first line includes information
about the:
•
type of instrument delivering the information
•
software level, type of printout
•
alarm parameters
The second line is the headings for the columns. The first and second lines are
printed out every 25 lines, or when a change to an alarm limit is made. Patient data is
represented with a date and time stamp for the data. In the example above, the “- - -”
means that a sensor was connected but no data was being received (patient
disconnect). Patient data that is outside of an alarm limit is marked with an *.
At the end of the printout “Output Complete” will be printed. This indicates that
there was no corruption of data. If the Output Complete statement is not printed at
the end of the printout, the data must be considered invalid.
ERRLOG (Mallinckrodt Customer Service Engineer Only)
A list of all the errors recorded in memory can be obtained by pressing the Errlog
softkey. The first two lines are the column heading lines. The type of instrument
producing the printout, software level, type of printout, and the time of the printout
are listed in the first line. The second line of the printout is column headings. If
nothing prints out, there have been no errors. An example of an Errlog printout is
shown in Figure 4-6.
NPB-295 Version 1.0.0.000
Op Time
Error
10713:21:03
52
00634:26:01
37
Output Complete
Error Log
Task
12
4
Time:
Addr
48F9
31A2
14600:00:07
Count
100
3
Figure 4-6: Errlog Printout
INSTAT (Mallinckrodt Customer Service Engineer Only)
4-5
Section 4: Power-On Settings and Service Functions
The Delete softkey, described in operator's manual, allows the user to delete the most
recent trend data. The current trend data, along with the deleted trends, can be
retrieved from the instrument through an Instat printout.
The oldest deleted trend is Trend 1 on the Instat printout. If a Trend 1 already exists
in memory from an earlier Delete, the next deleted trend will become Trend 2. Every
time a Delete is performed from the User Softkeys the number of existing trends will
increase by 1. The current trend will have the largest trend number.
Figure 4-7 illustrates an Instat printout. The first two lines are the column heading
lines. Line one is for instrument type, software revision level, type of printout, and
alarm parameter settings. The second line contains the column headings. A trend
point is recorded for every 2 seconds of instrument operation. Up to 24 hours of
instrument operation data can be recorded.
The final line on the printout shows Output Complete. This indicates that data has
been successfully transmitted with no corruption. If there is no Output Complete line
printed, the data should be considered invalid.
NPB-295
Version 1.0.0.000
Instrument
TIME
Trend 01
%SpO2 PR (bpm)
01-Jul-97 14:00:00
----01-Jul-97 14:00:05
----01-Jul-97 14:00:10
100
120
01-Jul-97 14:00:15
100
120
NPB-295
Version 1.0.0.000
Instrument
TIME
Trend 01
%SpO2 PR (bpm)
01-Jul-97 14:24:24
79*
58*
01-Jul-97 14:24:29
79*
57*
01-Jul-97 14:24:29
0*
0*
NPB-295
Version 1.0.0.000
Instrument
TIME
Trend 01
%SpO2 PR (bpm)
11-Jul-97 7:13:02
99
132*
11-Jul-97 7:13:07
99
132*
11-Jul-97 7:13:12
99
132*
11-Jul-97 7:13:17
99
132*
11-Jul-97 7:13:22
99
132*
11-Jul-97 7:13:27
99
132*
11-Jul-97 7:13:32
99
132*
Output Complete
SpO2 Limit: 30-100%
PA
SpO2 Status
--SD
--PS
220
220
SpO2 Limit: 80-100%
PA
SpO2 Status
220
PS
SL PL
220
PS
SL PL
--PS LP SL PL
SpO2 Limit: 80-100%
PA
SpO2 Status
220
PH
220
PH
220
PH
220
PH
220
PH
220
PH
220
PH
PR Limit: 100-180 bpm
UIF Status Aud
BU LB AO
L
BU LB AO
BU LB
BU LB
PR Limit: 60-180 bpm
UIF Status Aud
BU LB
M
BU LB AS
M
BU LB AS
H
PR Limit: 60-180 bpm
UIF Status Aud
BU
M
BU
M
BU
M
BU
M
BU
M
BU
M
BU
M
Figure 4-7: Instat Printout
INFO (Mallinckrodt Customer Service Engineer Only)
Pressing the INFO softkey produces a printout of instrument information (Figure
4-8). A single line will be printed. The data presented in the printout going from left
to right is:
•
instrument type (NPB-295)
•
Version is the software version level
•
type of printout (INFO)
•
CRC number (Cyclic Redundancy Check)
•
time in seconds (current operating time/total operating time).
NPB-295 Version XXXXXX INFO CRC:XXXX SEC: 123456789/987654321
Figure 4-8: INFO Printout
4-6
Section 4: Power-On Settings and Service Functions
Next
Additional options can be accessed from the main Service Functions menu by
pressing the Next softkey. When Next is pressed, the softkeys change to the
functions shown in Figure 4-9.
NPB-295
%SP02
BPM
DOWNLD ALARMS
NEXT
EXIT
-----
Figure 4-9: Next Softkeys
DOWNLD
When Downld is selected, the instrument will display the revision of the Boot Code.
To exit Downld, cycle power to the instrument by pressing the Power On/Off button.
Consult the DFU provided with any downloads or upgrades to the FLASH firmware.
ALARMS
Pressing the Alarms softkey can change characteristics of the audible alarm. When
the Alarms softkey is pressed, the softkey's functions change as shown in Figure
4-10.
NPB-295
ALARMS
ALLOW OFF?
OFF REMINDER?
SEL
%SP02
YES
YES
BPM
-----
EXIT
Figure 4-10: Alarms Softkeys
SELECT
The Sel softkey is used to select what function of the audible alarm is going to be
changed. A box can be cycled between two choices: Allow Off and Off Reminder.
When Allow Off is selected, a choice is given between allowing an audible alarm Off
or disabling the audible alarm Off. Pressing the Up or Down arrow key cycles
between Yes and No. If Yes is selected, the operator has the option of selecting
Audible Alarm Off. If No is selected, the operator is not given the option of selecting
Audible Alarm Off as an alarm silence duration choice.
If the audible alarm is set to Off, a reminder tone can be sounded every 3 minutes to
notify the user of this condition. The Up and Down arrow keys can be used to
change the choice from Yes to No. Selecting Yes enables the Reminder. Selecting
No disables the Reminder when the audible alarm is set to Off.
4-7
(Blank Page)
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-295. 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 trouble symptom disappears and that the monitor passes all
performance tests. If the trouble 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 Technical
Services 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
Troubleshooting guide
Problems with the NPB-295 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 may encounter. However, problems not covered
here can be resolved by calling Mallinckrodt Technical Services or your
local Mallinckrodt representative.
Table 5-1: Problem Categories
Problem Area
1. Power
•
No power-up on AC and/or DC
•
Fails power-on self-test
•
Powers down without apparent cause
2. Buttons
•
5.6.1
5.6.2
Monitor does not respond properly to
buttons
3. Display/Alarms
•
Displays do not respond properly
•
Alarms or other tones do not sound
properly or are generated without
apparent cause
4. Operational Performance
•
Displays appear to be operational, but
monitor shows no readings
•
Suspect readings
5. Data Port
•
Refer to Paragraph
5.6.3
5.6.4
5.6.5
NPB-295 serial port not functioning
properly
All of the categories in Table 5-1 are discussed in the following paragraphs.
5-2
Section 5: Troubleshooting
5.5.1
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. Battery Low
indicator lights
steadily while
NPB-295 is
connected to AC
and battery is fully
charged.
1. Ensure that the NPB-295 is plugged into an operational AC
outlet and the AC indicator is on.
2. Check the fuses. The fuses are located in the Power Entry
Module as indicated in paragraph 6.3 and Figure 6-3 of the
Disassembly Guide section. Replace if necessary.
3. Open the monitor as described in section 6. Verify the
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 6.80 ±
0.15 volts DC and the current should be 400 ± 80 mA.
Replace power supply if above values are not met.
4. Check the ribbon 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-295 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-295 battery before the instrument shuts off. At this
point, if possible, cease use of the NPB-295 on battery
power, connect it to an AC source and allow it to recharge
(approximately 14 hours). The NPB-295 may continue to
be used while it is recharging. (A full recharge of the
battery while the monitor is being used takes 18 hours.)
1. Replace battery if more than 2 years old.
2. Open the monitor as described in Section 6. Verify the
power supply’s output to the battery while on AC.
Disconnect the battery leads from the power supply and
connect a DVM to them. The voltage measured should be
6.8 ± 0.15 volts DC and the current should be 400 ± 80
mA. Replace power supply if above values are not met.
5-3
Section 5: Troubleshooting
5.5.2
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
5.5.3
Recommended Action
1. The NPB-295 responds
to some, but not all
buttons.
1. Replace Top Housing assembly.
2. The NPB-295 turns on
but does not respond to
any of the buttons.
1. Replace Top Housing assembly.
2. If the buttons still do not work, replace the UIF PCB.
2. If the buttons still do not work, replace the UIF PCB.
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
1. Display values are
missing or erratic.
Recommended Action
1. If the sensor is connected, replace the sensor
connector assembly.
2. If the condition persists, replace the sensor extension
cable.
3. If the condition still persists, replace the UIF PCB.
2. Display pixels do not
light.
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. 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. If the condition persists, replace the UIF PCB.
4. Alarm does not sound.
1. Replace the speaker as described in Section 6,
Disassembly Guide.
2. If the condition persists, replace the UIF PCB.
5-4
Section 5: Troubleshooting
5.5.4
Operational Performance
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. SpO2 or Pulse values
change rapidly; Pulse
AMPLITUDE indicator is
erratic.
1. The sensor may be damp or may have been reused
too many times. Replace it.
2. If the condition still persists, replace the UIF
PCB.
2. An electrosurgical unit (ESU) may be interfering
with performance:
• Move the NPB-295 and its cables and sensors
as far from the ESU as possible.
• Plug the NPB-295 power supply and the ESU
into different AC circuits.
• Move the ESU ground pad as close to the
surgical site as possible and as far away from
the sensor as possible.
3. Verify the performance with the procedures
detailed in Section 3.
4. If the condition still persists, replace the UIF
PCB.
5-5
Section 5: Troubleshooting
5.5.5
Data Port
Table 5-6 lists symptoms of problems relating to the data 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
1. No printout is being
received.
2. The RS-232 nurse call is
not working.
Recommended Action
1.
The unit is running on battery power. Connect to
an AC source.
2.
The monitor’s baud rate does not match the
printer’s. Change the baud rate of the monitor
following instructions in paragraph 4.2.4.
3.
The monitor’s data port protocol setting is
incorrect. Change the monitor’s data port protocol
setting following instructions in Appendix A.
4.
If the condition persists, replace the UIF PCB.
1.
The unit is running on battery power. Connect to
an AC source.
2. Verify connections are made between pins 5
(GND) and 11 (nurse call) of the data port.
3. Verify output voltage between ground pin 5
and pin 11 is –5 to –12 volts DC (no alarm)
and +5 to +12 volts DC (during alarm).
4. If the condition persists, replace the UIF PCB.
5-6
Section 5: Troubleshooting
5.6
ERROR CODES
An error code is displayed when the NPB-295 detects a non-correctable failure.
When this occurs, the unit stops monitoring, sounds a low priority alarm that cannot
be silenced, clears patient data from the display, and displays an error code.
Table 5-7 provides a complete list of error codes and possible solutions.
Table 5-7: Error Codes
Code
1
4
Meaning
POST failure
Battery dead
5
Too many microprocessor resets within
a period of time
6
7
Boot CRC error
Error on UIF PCB
8
11
12
Boot CRC Error
Flash ROM corruption
Excessive resets
52
Loss of settings
76
80
Error accessing EEPROM
Institutional default values lost and reset
to factory default values
81
Settings lost (settings that were different
from power on default values have been
lost)
82
Time clock lost
84
Internal communications error
Possible Solutions
Replace UIF PCB
1. Check the voltage selector
switch.
2. Charge battery for 14 hours
3. Leads of battery reversed;
refer to paragraph 6.5
4. Replace battery
1. Cycle power
2. Replace UIF PCB if code 5
repeatedly occurs
3. Replace Power Supply
Replace UIF PCB
1. Cycle power to clear error.
2. Check voltage selector
switch for proper setting.
3. Replace UIF PCB
1. Cycle power
2. Replace UIF PCB if code
repeatedly occurs
1. Cycle power
2. Check and reset settings
if necessary
3. Check battery
4. Replace UIF PCB if code
repeatedly occurs
Replace UIF PCB
1. Cycle power
2. Replace UIF PCB if code 80
repeatedly occurs
1. Cycle power
2. Check and reset settings
if necessary
3. Check battery
4. Replace UIF PCB if code
repeatedly occurs
1. Reset time clock
2. Battery power was lost;
check the battery
3. Replace the Power Supply
1. Cycle power
2. Replace UIF PCB if code
repeatedly occurs
5-7
(Blank Page)
SECTION 6: DISASSEMBLY GUIDE
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
6.10
6.11
6.12
6.1
Introduction
Prior to Disassembly
Fuse Replacement
Monitor Disassembly
Monitor Reassembly
Battery Replacement
Power Entry Module Removal/Installation
Power Supply Removal/Installation
Cooling Fan Removal/Installation
Display PCB Removal/Installation
UIF PCB Removal/Installation
Alarm Speaker Removal/Installation
INTRODUCTION
The NPB-295 can be disassembled down to all major component parts, including:
•
PCBs
•
battery
•
cables
•
chassis enclosures
The following tools are required:
•
small, Phillips-head screwdriver
•
medium, Phillips-head screwdriver
•
small blade screwdriver
•
needle-nose pliers or 1/4-inch socket
•
torque wrench, 10 inch-pounds (1.13 Newton-meters)
WARNING: Before attempting to open or disassemble the NPB-295, disconnect
the power cord from the NPB-295.
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-295 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 procedure in paragraph 6.2
2.
Disconnect the power cord from the back of the monitor.
3.
Use a flat blade screwdriver to remove the fuse drawer from the Power Entry
Module. Press down on the tab in the center of the fuse drawer with the
screwdriver until a click is heard. Pull the drawer out as shown in
Figure 6-1.
Figure 6-1: Fuse Removal
4.
6-2
Put new, 5 x 20 mm, slow blow 0.5 amp, 250 volt fuses in the drawer and
reinsert the drawer in the power entry module.
Section 6: Disassembly Guide
6.4
MONITOR DISASSEMBLY
Caution: Observe ESD (electrostatic discharge) precautions when
disassembling and reassembling the NPB-295 and when handling any of the
components of the NPB-295.
1.
Set the NPB-295 upside down, as shown in Figure 6-2.
Corner screws
Figure 6-2: NPB-295 Corner Screws
2.
Remove the four corner screws.
3.
Turn the unit upright.
4.
Separate the top case from the bottom case of the monitor being careful not to
stress the wire harnesses between the cases.
5.
Place the two halves of the monitor on the table as shown in Figure 6-3.
6.
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.
2.
Connect the Power Supply to J6 on the UIF PCB.
3.
Place the top case over the bottom case being careful to align the lens, Power
Entry Module, and the fan with the slots in the top case.
Caution: When reassembling the NPB-295, 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 it unusable.
4.
6-4
Install the four corner screws.
Section 6: Disassembly Guide
6.6
BATTERY REPLACEMENT
Removal
1.
Follow the procedure in paragraphs 6.2 and 6.4.
2.
Remove the two screws from the battery bracket and lift the battery out of the
bottom case as shown in Figure 6-4.
3.
Be sure to note the polarity of the leads. Use needle-nose pliers to disconnect
the leads from the battery.
Note:
The lead-acid battery is recyclable. Do not dispose of the battery by placing
it in the regular trash. Dispose of properly or return to Mallinckrodt
Technical Services for disposal.
Figure 6-4: NPB-295 Battery
Installation
4.
Connect the leads to the battery.
•
Red wire connects to the positive terminal
•
Black wire connects to the negative terminal.
5.
Insert the new battery into the bottom case with the negative terminal towards
the outside of the monitor.
6.
Install the bracket and grounding lead with the two screws.
7.
Complete the procedure in paragraph 6.5.
8.
Turn the monitor on and verify proper operation.
6-5
Section 6: Disassembly Guide
6.7
POWER ENTRY MODULE (PEM) REMOVAL/INSTALLATION
Removal
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Push the top of the Power Entry Module (PEM) in from the outside of the case,
and lift up.
3.
Use needle-nose pliers to disconnect the leads from the PEM (see Figure 6-5).
G
N
L
Equipotential
lug
Figure 6-5: Power Entry Module
Installation
6-6
4.
Refer to Table 6-1 and connect the leads to the PEM.
5.
Install the PEM in the bottom case with the fuse drawer facing down. A tab in
the bottom case holds the PEM in place. Insert the bottom wing of the PEM
between the tab and the internal edge of the side wall of the bottom case. Push
the PEM down and towards the outside of the monitor until it clicks into place.
6.
Position the ground line from the PEM so that it does not come into contact
with components of the Power Supply PCB.
7.
Complete the procedure in paragraph 6.5.
Section 6: Disassembly Guide
6.8
POWER SUPPLY REMOVAL/INSTALLATION
Removal
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Disconnect the leads from the battery.
3.
Complete the procedure in paragraph 6.7 steps 2 through 3.
4.
Use a 10-mm wrench to disconnect the Power Supply ground lead from the
equipotential lug (Figure 6-5).
5.
Disconnect the fan wire harness from J1 on the Power Supply PCB
(see Figure 6-7).
6.
Remove the seven screws shown in Figure 6-6.
7.
Lift the Power Supply out of the bottom case.
Figure 6-6: Power Supply
6-7
Section 6: Disassembly Guide
Installation
8.
Reconnect the AC leads W1, W2, and W3 to the PEM following the
instructions in Table 6-1 below and Figure 6-5.
Table 6-1: Power Supply Leads Connections
Power
Supply Lead
W1
W2
W3
W4
W5
9.
Wire Color or
Label
Green & Yellow
Brown/Labeled
“L”
Blue/Labeled
“N”
Red
Black
Connects To
Equipotential Lug
“L” on the Power Entry
Module
“N” on the Power Entry
Module
Positive Battery Terminal
Negative Battery Terminal
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. Over tightening could strip out the screw holes in
the bottom case, rendering it unusable.
6-8
10.
Install the seven screws in the power supply and tighten.
11.
Connect the cooling fan harness to J1 of the power supply.
12.
Use a 10-mm wrench to connect the power supply ground lead to the
equipotential lug. Tighten to 12 inch pounds.
13.
Follow the procedure in paragraph 6.7, step 5 and 6.
14.
Verify the ground wire to the PEM is positioned so that it does not come into
contact with components on the Power Supply PCB.
15.
Reconnect W4 and W5 to the battery by following the instructions in
Table 6-1.
16.
Complete the procedure in paragraph 6-5.
Section 6: Disassembly Guide
6.9
COOLING FAN REMOVAL/INSTALLATION
Removal
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Disconnect the fan wire harness from J1 on the Power Supply PCB
(see Figure 6-7).
3.
Lift the cooling fan from the slots in the bottom case (see Figure 6-7).
J1
Figure 6-7: Cooling Fan
Installation
4.
Connect the cooling fan wire harness to J1 on the Power Supply PCB.
5.
Insert the cooling fan into the slots in the bottom case with the padded sides on
the top and bottom and the fan's harness to the handle side of the case.
6.
Complete procedure 6-5.
6-9
Section 6: Disassembly Guide
6.10 DISPLAY PCB REMOVAL/INSTALLATION
Removal
Caution: The LCD panel contains toxic chemicals. Do not ingest chemicals
from a broken LCD panel.
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Disconnect the CCFL harness (two white wires) from J5 of the UIF PCB.
3.
Use a small blade screwdriver to pry the clip from either edge of J9, then
disconnect the Display PCB ribbon cable from the connector.
4.
Remove the screw holding the clamp to the ferrite on the ribbon cable of the
Display PCB.
5.
Separate the adhesive connection of the double-sided tape and lift the Display
PCB up to remove it from the top case.
6.
Remove the used double-sided tape.
Double-sided
tape
Speaker wires to J13
on the UIF PCB
Keypad ribbon cable
to J8 on UIF PCB
CCFL wires to J5
on the UIF PCB
Display ribbon cable
to J9 on UIF PCB
Figure 6-8: Display PCB
6-10
Section 6: Disassembly Guide
Installation
7.
Install new double-sided tape as shown in Figure 6-8.
8.
Slide the Display PCB into the grooves in the top case.
9.
Check to make sure the Display PCB is firmly seated in the top case.
10.
Apply pressure between the top case and the display PCB to make good
contact with the double-sided tape.
11.
Connect the wire harness with two white wires to J5 of the UIF PCB.
12.
Connect the Display PCB ribbon cable to J9 of the UIF PCB.
13.
Install the clip over the J9 connector.
14.
Secure the ferrite on the ribbon cable from the Display PCB.
15.
Place the clamp over the ferrite, assure that no wires are pinched, and screw
the clamp to the UIF PCB.
16.
Complete the procedure in paragraph 6.5.
6.11 UIF PCB REMOVAL/INSTALLATION
Removal
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Complete steps 2 through 4 of the procedure in paragraph 6.10.
3.
Disconnect the keypad ribbon cable from J8 of the UIF PCB (Figure 6-8). J8
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 J13 on the UIF PCB.
5.
Remove the four screws in the UIF PCB (Figure 6-9).
6.
Remove the UIF PCB from the top case.
6-11
Section 6: Disassembly Guide
Figure 6-9: UIF PCB
Installation
Caution: When installing the UIF PCB, hand tighten the five screws to a
maximum of 4 inch pounds. Over-tightening could strip out the screw holes in
the top case, rendering it unusable.
6-12
7.
Place the UIF PCB in the top case.
8.
Install the four screws in the UIF PCB.
9.
Lift up on the outer shell of J8 on the UIF PCB until it clicks.
10.
Insert the keypad ribbon cable into J8 of the UIF PCB.
11.
Slide the outer shell of J8 down until it locks in place.
12.
Connect the speaker cable to J13 of the UIF PCB.
13.
Complete steps 9 through 11 of the procedure in paragraph 6.10.
14.
Complete the procedure in paragraph 6.5.
Section 6: Disassembly Guide
6.12 ALARM SPEAKER REMOVAL/INSTALLATION
Removal
1.
Complete the procedures in paragraphs 6.2 and 6.4.
2.
Disconnect the speaker wire harness from J13 on the UIF PCB (see Figure 610).
3.
Pull the speaker holding clip towards the center of the monitor and lift the
speaker from the top housing.
Holding Clip
Connect speaker
wires to J13 connector
Figure 6-10: Alarm Speaker
Installation
4.
Slide the speaker into the plastic holding clip provided in the top housing.
5.
Connect speaker wire harness to J13 on the UIF PCB.
6.
Complete the procedure in paragraph 6.5.
6-13
(Blank Page)
SECTION 7: SPARE PARTS
7.1
7.1
Introduction
INTRODUCTION
Spare parts, along with part numbers, are shown below. Item numbers correspond to
the callout numbers in Figure 7-1.
Table 7-1: Parts List
Item Description
Part No.
1
Top Case Assembly (Membrane Panel Included)
048499
2
Fuse Drawer
691500
3
Fuses
691032
4
Power Entry Module
691499
5
Cooling Fan
035469
6
Power Supply
035800
7
LCD PCB
035416
8
Battery
640119
9
Battery Bracket
035307
10
UIF PCB
035355
Alarm Speaker (not shown)
033494
Rubber Feet (not shown)
4-003818-00
Power Cord (not shown)
U.S. 071505
International 901862
U.K. 901863
Tilt Stand (not shown)
891340
GCX Mounting Kit (not shown)
035434
7-1
Section 7: Spare Parts
Figure 7-1 shows the NPB-295 expanded view with numbers relating to the spare
parts list.
1
NP
B-
29
5
10
2
3
9
4
8
5
6
7
Figure 7-1: NPB-295 Expanded View
7-2
SECTION 8: PACKING FOR SHIPMENT
8.1
8.2
8.3
General Instructions
Repacking in Original Carton
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 any applicable 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-295, 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.
Return the NPB-295 by any shipping method that provides proof of delivery.
8.2
REPACKING IN ORIGINAL CARTON
If available, use the original carton and packing materials. Pack the monitor as
follows:
1.
Place the monitor and, if necessary, accessory items in original packaging.
8-1
Section 8: Packing for Shipment
Figure 8-1: Repacking the NPB-295
8-2
2.
Place in shipping carton and seal carton with packaging tape.
3.
Label carton with shipping address, return address and RGA number, if
applicable.
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 N-295:
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,
if applicable.
8-3
(Blank Page)
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), ISO 9919,
EMC per EN 60601-1-2.
9.2
ELECTRICAL
Protection Class
Degree of Protection
Mode of Operation
Battery
Type:
Operating time:
Recharge period:
Fuses
AC Power
Selectable by switch
9.3
Rechargeable, sealed lead-acid, internal
8 hours minimum on new, fully charged battery
under the following conditions: no alarms, no
analog or serial output devices attached and no
backlight
14 hours for full charge (in standby)
18 hours for full charge (in use)
2 each 5 X 20 mm
Slow Blow 0.5 Amp, 250 volts
100-120 volts AC, 50/60 Hz or
200-240 volts AC, 50/60 Hz
20 VA
PHYSICAL CHARACTERISTICS
Dimensions
Weight
9.4
Class I: per I.E.C. 601-1, clause 2.2.4
Type BF: per I.E.C. 601-1, clause 2.2.26
Continuous
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
5.7 lbs., 2.6 kg
ENVIRONMENTAL
Operating Temperature
Storage Temperature
Boxed
Unboxed
5° C to 40° C (+41° F to +104° F)
-20° C to +70° C (-4° F to +158° F)
-20° C to +60° C (-4° F to +140° F)
9-1
Section 9: Specifications
9.5
9.6
Operating Altitude
Relative Humidity
-390 m to +3,658 m (-1,280 ft. to +12,000 ft.)
15% RH to 95% RH, noncondensing
Alarm Limit Range
% Saturation:
Pulse:
20-100%
30-250 bpm
ALARMS
FACTORY DEFAULT SETTINGS
Table 9-1: Default Settings
Parameter
9.7
Alarm Silence Duration
60 seconds
Alarm Silence Restriction
Off with reminder
Alarm Volume
Level 5
Baud Rate
9600
Contrast
Mid-range
Data Port Mode
ASCII
Display
Pleth
Language
English
Nurse Call Polarity
Positive (NCALL+)
Pulse Beep Volume
Level 4
Pulse Rate High
170 bpm
Pulse Rate Low
40 bpm
SpO2 High
100%
SpO2 Low
85%
Trend
Saturation
PERFORMANCE
Measurement Range
SpO2:
Pulse/Heart Rate:
Accuracy
SpO2
Adult:
Neonatal:
9-2
Default Value
0-100%
20-250 bpm
70-100% ± 2 digits
0-69% unspecified
70-100% ± 2 digits
0-69% unspecified
Section 9: Specifications
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. Neonatal accuracy is determined
with Oxisensor II N-25 sensors. In addition, the neonatal accuracy specification
is 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
(Blank Page)
SECTION 10: SERIAL PORT INTERFACE PROTOCOL
10.1
10.2
10.3
10.4
10.5
10.6
10.7
Introduction
Configuring the Data Port
Connecting to the Data Port
Real-Time Printout
Trend Data Printout
Nurse Call
Analog Output
10.1 INTRODUCTION
When connected to the data port on the back of the NPB-295, printouts can be
obtained, or communication of patient data can be sent to a Nellcor Oxinet II
Monitoring System. Analog signals representing %SpO2, Pulse Rate, and Pulse
Amplitude are provided by the data port. A nurse call function is available from the
data port. Each of these is discussed in more detail in the paragraphs that follow.
10.2 CONFIGURING THE DATA PORT
Items pertaining to the data port can be adjusted by following the softkey map in
Figure 10-1. For a complete description of the softkeys, refer to the operator's
manual.
%SPO2
BPM
LIMITS
TREND
SETUP
LIGHT
VIEW
CLOCK
NEXT
EXIT
LANG
NEXT
EXIT
COMM
Adjust baud rate,
and protocol
95
65
Normal
Display Mode
Select
Language
NCALL
ANALOG
Norm + or
Norm -
0 Volt, 1 Volt,
or Step
Figure 10-1: Data Port Softkeys
The COMM key is used to select communication protocols supported by the data
port. The selections are:
•
ASCII used for printouts
•
OXINET II to enable communication with Oxinet
•
Score TM analysis software.
10-1
Section 10: Serial Port Interface Protocol
Note:
When using Score software use the latest version. Contact
Mallinckrodt’s Technical Services Department or your local
Mallinckrodt representative to determine the latest version of Score
software.
•
CLINICAL which is intended for Mallinckrodt use only
•
GRAPH used for graphical printouts (will stop real-time print data)
To change the communication protocol, press Setup, Next, Select and Comm. Use
the Adjust Up/Down buttons to select the desired communications protocol.
The baud rate may need to be changed to match the abilities of the attached
equipment. To change the baud rate, press Setup, Next, and Comm. Use the Adjust
Up/Down buttons to select a baud rate of 2400, 9600, or 19200.
Seven languages can be viewed on the screen and sent to the printer. The language
being used can be changed by pressing Setup, Next, and Lang. Use the Adjust
Up/Down buttons to select the desired language.
The voltage polarity for the Nurse Call, available at pins 11 and 5, can be selected
through the softkeys. By pressing Setup, Next, Next, and NCALL, a choice of
NORM + or NORM - is offered. NORM + sets the voltage to +5 volts DC to + 12
volts DC and NORM - sets the voltage to- 5 volts DC to - 12 volts DC when there is
no audible alarm. When an audible alarm occurs, these voltages switch polarity.
This signal is only available if the instrument is operating on AC power. For more
information on Nurse Call, refer to paragraph A6 in this Appendix.
Analog calibration signals are provided to adjust a recorder to the output of the
instrument. Selectable calibration signals are 1.0 volt DC, 0.0 volts DC, and Step.
The signals are accessed by pressing Setup, Next, Next, and Analog. For more
information on the analog signals, refer to paragraph A7 in this Appendix.
10.3 CONNECTING TO THE DATA PORT
Data is transmitted in the RS-232 format (pins 2,3, and 5) or RS-422 (pins 1,4,9, and
12). RS 232 data can be transmitted a maximum of 25 feet. The pin outs for the data
port are listed in the chart below.
10-2
Section 10: Serial Port Interface Protocol
Table 10-1: Data Port Pin Outs
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Note:
Signal
RXD+ (RS-422 positive input)
RXD_232 (RS-232 input)
TXD_232 (RS-232 output)
TXD+ (RS-422 positive output)
Signal Ground (isolated from earth ground)
AN_SpO2 (analog saturation output)
Normally Open, Dry Contacts, for
Nurse Call (N.O. with no audible alarm)
Normally Closed, Dry Contacts, for Nurse Call
(N.C. with no audible alarm)
RXD- (RS-422 negative input)
Signal Ground (isolated from earth ground)
Nurse Call (RS-232 level output {-5 to -12 volts
DC with no audible alarm} {+5 to +12 volts DC
with audible alarm})
TXD- (RS-422 negative output)
AN_PULSE (analog pulse rate output)
AN_PLETH (analog pleth wave output)
Nurse Call Common for Dry Contacts
When the instrument is turned off, the contact at pin 7 becomes closed and
the contact at pin 8 becomes open.
The pin layout is illustrated in Figure 10-1. The conductive shell is used as earth
ground. An AMP connector is used to connect to the data 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 10 11 12 13 14 15
1
2
3
4
5
6
7
8
Figure 10-2: Data Port Pin Layout
When building an RS-422 cable, a resistor (120 ohm, 1/4 watt, 5%) must be added
between pins 1 and 9 of the cable. The end of the cable with the resistor added must
be plugged into the NPB-295. This resistor is not necessary for RS-232 cables.
The serial cable must be shielded (example: Beldon P/N 9616). 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.
10.4 REAL-TIME PRINTOUT
When a real-time display or printout is being transmitted to a printer or PC, a new
line of data is printed every 2 seconds. Every 25th line is a Column Heading line. A
column heading line is also printed any time a value in the column heading line is
changed. A real-time printout is shown below in Figure 10-2.
Note:
If the data output stops transmitting, turn the power off and back on again,
or, if connected to a PC, send an XON (Ctrl-q) to resume transmission.
10-3
Section 10: Serial Port Interface Protocol
NPB-295
TIME
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
01-Jul-97
NPB-295
TIME
01-Jul-97
NPB-25
TIME
01-Jul-97
01-Jul-97
VERSION 1.0.0.1
%SpO2
14:00:00
100
14:00:02
100
14:00:04
100
14:00:06
100
14:00:08
100
14:00:10
100
14:00:12
100
14:00:14
100
14:00:16
100
14:00:18
100
14:00:20
100
14:00:22
--14:00:24
--14:00:26
--14:00:28
--14:00:30
--14:00:32
--14:00:34
--14:00:36
--14:00:38
--14:00:40
--14:00:42
--14:00:44
--VERSION 1.0.0.1
%SpO2
14:00:46
--VERSION 1.0.0.1
%SpO2
14:00:48
79*
14:00:50
79*
CRC: XXXX
BPM
120
124
190
190*
190*
190*
190*
190*
190*
190*
190*
------------------------CRC: XXXX
BPM
--CRC: XXXX
BPM
59*
59*
SpO2 Limit: 30-100%
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%
PA
Status
--PS
SpO2 Limit: 80-100%
PA
Status
220
SL PL LB
--PS SL PL LB
PR Limit: 100-180 bpm
PR Limit: 100-180 bpm
PR Limit: 100-180 bpm
Figure 10-3: Real-Time Printout
10.4.1
Column Heading
NPB-295
VERSION 1.0.0.1
%SpO2
TIME
CRC: XXXX
BPM
SpO2 Limit: 30-100%
PA
Status
PR Limit: 100-180 bpm
The first two lines of the chart are the Column Heading. Every 25th line is 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 10-2. 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%.
Data Source
NPB-295
TIME
VERSION 1.0.0.1
%SpO2
CRC XXXX
BPM
SpO2 Limit: 30-100%
PA
Status
PR Limit: 100-180 bpm
Data in the highlighted box above represents the source of the printout or display, in
this case the NPB-295.
Software Revision Level
NPB-295
TIME
VERSION 1.0.0.1
%SpO2
CRC: XXXX
BPM
SpO2 Limit: 30-100%
PA
Status
PR Limit: 100-180 bpm
The next data field tells the user the software level, (Version 2.0.0.0) 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.
10-4
Section 10: Serial Port Interface Protocol
Alarm Limits
NPB-295
VERSION 1.0.0.1
TIME
%SpO2
CRC: XXXX
BPM
SpO2 Limit: 30-100%
PA
Status
PR Limit: 100-180 bpm
The last data field in the top line indicates the high and the 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-295
VERSION 1.0.0.1
%SpO2
TIME
CRC: XXXX
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 that is presented in the chart, from left to right, is the time that the line was
obtained, the current %SpO2 value being measured, the current Pulse Rate in beats
per minute (bpm), the current Pulse Amplitude (PA), and the operating status of the
NPB-295.
10.4.2 Patient Data and Operating Status
Time
TIME
01-Jul-97 14:00:00
%SpO2
100
BPM
PA
120
Status
2
2
0
The Time column represents the NPB-295 real-time clock.
Patient Data
NPB-295
VERSION 1.0.0.1
TIME
01-Jul-97 14:00:06
%SpO2
100
CRC: XXXX
BPM
SpO2 Limit: 30-100%
Status
PA
190*
2
2
0
PR Limit: 100-180 bpm
PH
Patient data and the operating status of the unit are highlighted in the display above.
Parameter values, at the time of the printout, are displayed directly beneath the
heading for each parameter. In this example the %SpO2 is 100, and the 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. 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.
Operating Status
NPB-295
VERSION 1.0.0.1
TIME
01-Jul-97 14:00:06
%SpO2
100
CRC: XXXX
BPM
190*
SpO2 Limit: 30-100%
PA
Status
220
PR Limit: 100-180 bpm
PH
The Status column indicates alarm conditions and operating status of the
NPB-295. In this example the PH means Pulse High. A complete listing of the
status codes is listed in Table 10-2. As many as 4 codes can be displayed at one time
in the Status column.
10-5
Section 10: Serial Port Interface Protocol
Table 10-2: Status Codes
Code
AO
AS
BU
LB
LM
LP
MO
PH
PL
PS
SD
SH
SL
--*
Note:
Meaning
Alarm Off
Alarm Silence
Battery in Use
Low Battery
Loss of Pulse with Motion
Loss of Pulse
Motion
Pulse Rate High Limit Alarm
Pulse Rate Low Limit Alarm
Pulse Search
Sensor Disconnect
Sat High Limit Alarm
Sat Low Limit Alarm
No Data Available
Alarm Parameter Being Violated
A Sensor Disconnect will also cause three dashes (- - -) to be displayed in
the patient data section of the printout.
10.5 TREND DATA PRINTOUT
In the ASCII mode, the format of data displayed when a trend printout is requested is
similar to that of the real-time data. The only differences are that “TREND” is
displayed in the top row instead of the “CRC:XXXX” software verification number,
and there is no “Status” column.
In the GRAPH mode, the NPB-295 trend printout is a copy of the trend displayed on
the NPB-295’s screen.
Readings are displayed in 2-second intervals. The values on each row are an average
for the 2-second period.
At the end of the printout, an “Output Complete” line indicates that the transmission
was successful. If the “Output Complete” line is not present, the data should be
considered invalid.
NPB-295
VERSION 1.0.0.1
TIME
22-Nov-97 14:00:05
22-Nov-97 14:00:10
22-Nov-97 14:00:15
Output Complete
%SpO2
100
100
100
PR (bpm)
SpO2 Limit:
PA
120
121
120
150
154
150
CRC: XXXX
30-100%
PR Limit: 100-180 bpm
Figure 10-4: Trend Data Printout
10.6 NURSE CALL
An RS-232 Nurse Call signal (pins 5 and 11) can be obtained by connecting to the
data port. It is in the form of a positive or negative voltage chosen by the user. This
function is only available when the instrument is operating on AC power. The RS232 Nurse Call will be disabled when the unit is operating on battery power.
10-6
Section 10: Serial Port Interface Protocol
The remote location will be signaled anytime there is an audible alarm. If the audible
alarm has been set Off, or silenced, the Nurse Call function is also turned off.
Pin 11 on the data port is the RS-232 Nurse Call signal and pin 5 is ground (see
Figure 10-1). When there is no audible alarm, the voltage between pins 10 and 11
will be a -5 volt DC to -12 volts DC, or +5 volts DC to +12 volts DC, depending on
the option chosen via the softkeys (either NCALL+ or NCALL-). Whenever there is
in an audible alarm, the output between pins 5 and 11 will reverse polarity.
An internal Nurse Call relay (pins 7, 8, and 15) provides dry contacts that can be used
to signal a remote alarm. These contacts can be used whether the instrument is
operating on AC or on its internal battery. Pin 15 is common, pin 7 is N.O., and pin
8 is N.C. Table 10-3 shows the state of the contacts for alarm and no alarm
conditions, and for instrument off.
Table 10-3: Nurse Call Relay Pin States
Pin
No Alarm or Alarm
Silenced
Audible
Alarm
Instrument Off
7 N.O.
Open
Closed
Closed
8 N.C.
Closed
Open
Open
Table 10-4: Rating of Nurse Call Relay
Maximum Input Voltage
30 volts AC or DC (polarity is not important)
Load Current
120 mA continuous (peak 300 mA @ 100 ms)
Minimum Resistance
26 ohms to 50 ohms (40 ohms typical) during
alarms
Ground Reference
Isolated Ground
Electrical Isolation
1,500 Volts
10.7 ANALOG OUTPUT
Analog outputs are provided for Saturation, Pulse Rate, and a Plethysmographic
waveform. These outputs are available only if the monitor is operating on AC power.
The output voltage is 0.0 to + 1.0 volt DC for all three parameters. A 1.0 volt DC
output for saturation equals 100%; for pulse rate it equals 250 bpm; and for
plethysmographic waveform, it equals 255 pulse amplitude units (pau). The voltage
will decrease as the values for these parameters decrease. If no data for a parameter
is available, the output voltage for that parameter will be a 0.0 volts DC.
At power-on after the completion of POST, the instrument will initiate an automatic
three-step calibration signal. The calibration signal will begin at 0.0 volts DC and
hold that point for 60 seconds. It will then jump up to 1.0 volt DC and hold that
value for 60 seconds. The third part of the calibration signal is a stair step signal.
The stair step signal will start at 0.0 volts DC and increase up to 1.0 volt DC in 1/10
volt increments. Each increment will be held for 1 second. Through use of the
softkeys, the 0.0 volts DC, 1.0 volt DC, or stair step signal can be selected
individually (refer to Section 4).
10-7
(Blank Page)
SECTION 11: TECHNICAL SUPPLEMENT
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
11.10
Introduction
Oximetry Overview
Circuit Analysis
Functional Overview
AC Input
Power Supply Theory of Operation
Battery
User Interface PCB (UIF)
Front Panel Display PCB and Controls
Schematic Diagrams
11.1 INTRODUCTION
This Technical Supplement provides the reader with a discussion of oximetry
principles and a more in-depth discussion of NPB-295 circuits. Block and schematic
diagrams support a functional overview and detailed circuit analysis. The schematic
diagrams are located at the end of this supplement.
11.2 OXIMETRY OVERVIEW
The NPB-295 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 NPB-295 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-295 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.
11.2.1 Functional versus Fractional Saturation
The NPB-295 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, some instruments
such as the IL282 Co-oximeter measure fractional saturation, that is, oxygenated
hemoglobin expressed as a percentage of all measured hemoglobin, including
dyshemoglobins.
Consequently, before comparing NPB-295 measurements with those obtained by an
instrument that measures fractional saturation, measurements must be converted as
follows:
11-1
Section 11: Technical Supplement
100
functional fractional
saturation = saturation x 100-(% carboxyhemoglobin +%methemoglobin)
11.2.2 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-295 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 11-1 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 11-1: Oxyhemoglobin Dissociation Curve
11.3 CIRCUIT ANALYSIS
The following paragraphs discuss the operation of each of the printed circuit boards
within the NPB-295 pulse oximeter. Refer to the appropriate schematic diagram at
the end of this supplement.
11.4 FUNCTIONAL OVERVIEW
The monitor functional block diagram is shown in Figure 11-2. Most of the
functions of the NPB-295 are performed on the UIF PCB functions on the UIF PCB
include the 331 and PIC, and Memory. Other key components of the NPB-295 are
the Power Entry Module (PEM), Power Supply, and the LCD Display.
The Display module includes the Membrane Panel and the LCD Display. The
Membrane panel contains annunciators and push buttons, allowing the user to access
information and to select various available parameters. The LCD Display PCB
contains the LCD, which presents the patient data.
11-2
Section 11: Technical Supplement
Power
Entry
Module
Power Supply
Fuses
Battery
Charger
Membrane
Panel
DC
Supply
Battery
LCD Display
RTC
Alarm Speaker
MC68331
CPU
Data port
System RAM
256K
Flash ROM
256K
UIF PCB
PIC 16C63
Front End
Patient
Connection
Figure 11-2: NPB-295 Functional Block Diagram
11.5 AC INPUT
A selector switch on the back of the NPB-295 allows the user to connect the monitor
to AC power ranging from 100 volts AC to 240 volts AC. The switch has two
positions, one for 100 volts AC through 120 volts AC and one for 210 volts AC
through 240 volts AC. Verify the switch selection matches the AC power at your
location before plugging the monitor into an AC outlet.
AC power enters the NPB-295 through the Power Entry Module (PEM). A 0.5 amp
fuse is placed in both the “Hot” and “Neutral” lines. These user accessible fuses are
located in a fuse drawer, which is part of the PEM on the back of the instrument.
11.6 POWER SUPPLY PCB THEORY OF OPERATION
The NPB-295 uses an unregulated linear power supply. This power supply provides
the DC power needed to charge the battery, run the cooling fan and to power the User
Interface PCB (UIF). Electro Static Discharge (ESD) protection and patient isolation
from mains, 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 volts AC position, the primary windings are in parallel. The primary
windings are in series if SW1 is in the 240 volts AC 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 volts AC. High frequency noise from the AC line and from the UIF PCB is
filtered by C6 and C8 before passing through the bridge rectifier.
Two outputs from the bridge rectifier are used in the NPB-295. The fan control
circuit uses the negative output. The positive output is the Main DC ranging from 7
to 18 volts DC. This positive voltage is used for the battery circuit and to power the
UIF PCB.
11-3
Section 11: Technical Supplement
11.6.1 Fan Control
A fan control circuit on the Power Supply PCB is used to control the temperature
inside the case of the NPB-295. The temperature sensor used in this circuit is U3.
U3 turns on the cooling fan if the temperature inside the case gets above
approximately 31° C. The cooling fan runs on approximately 15 volts DC.
Note:
The fan is disabled if the unit is running on battery power.
11.6.2 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-295 is connected to AC
power even if the monitor is not turned on. The voltage applied to the battery is
6.8 ± 0.15 volts DC and is current limited to 400 ± 80 mA.
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 the battery voltage is below 5.85 ± 0.1 volts DC a low battery alarm is
declared.
Battery Protection
Two types of battery protection are provided by the Power Supply: protection for the
battery and protection from the battery.
Switch 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 2.0 amps, F3 opens. F3 protects the battery from a
short to ground of the battery output.
Protection from the battery is provided for the event the battery is connected
backwards. Components on the UIF PCB and the Power Supply block and limit the
voltage to provide protection to circuits in the instrument.
11.7 BATTERY
A lead-acid battery is used in the NPB-295. It is rated at 6 volts DC, 4 amphours.
When new and fully charged, the battery will operate the monitor for 8 hours under
the following conditions: no alarms, no analog or serial output devices attached and
no backlight. The battery can withstand 400 charge/discharge cycles. Recharging
the battery to full capacity will take 14 hours in standby or 18 hours if the instrument
is being used.
Changeover from AC to battery power will not interrupt the normal monitoring
operation of the NPB-295. However, when the unit is running on battery power, the
cooling fan, data port, RS-232 Nurse Call, and LCD backlight will be turned off.
The 331 CPU on the UIF PCB monitors the charge level of the battery. If the voltage
of the battery falls below 5.85 ± 0.1 volts DC, a low battery alarm is declared. The
instrument will continue monitoring and alarming for 15 minutes then power down.
This 15-minute alarm and power-down sequence can be repeated by turning the unit
back on, provided the battery voltage remains above the critical level.
11-4
Section 11: Technical Supplement
Battery voltage is considered critical when it decreases to 5.67 ± 0.1 volts DC. If the
instrument is turned on and battery voltage is at the critical level, an error code is
displayed and the instrument will not monitor the patient. The instrument will run
for 15 minutes with the error code displayed and then power down.
Both conditions can be corrected by plugging the unit into an AC source for 14 hours
to allow the battery to fully recharge.
11.8 USER INTERFACE PCB (UIF)
The UIF PCB is the heart of the NPB-295. All functions except the unregulated DC
power supply, LCD display and membrane keypad reside on the UIF PCB.
11.8.1 Regulated DC Power Supply
The UIF PCB receives the Main_DC unregulated voltage of 7 to 18 volts DC from
the Power Supply or 5.8 to 6.5 volts DC from the internal battery. From either of
these signals, the regulated power supply on the UIF PCB generates +10.0, -10.0, 5.0 and +5.0 volts DC.
11.8.2 Controlling Hardware
Two microprocessors reside on the UIF PCB. The CPU is a Motorola MC68331CF
(331). The second microprocessor PIC16C63 is referred to as the PIC and is
controlled by the CPU.
CPU
The 331 is the main controller of the NPB-295. The 331 controls the front panel
display, data storage, instrument status, sound generation, and monitoring and
controlling the instrument's power. The 331 also control data port communication
and the Nurse Call feature.
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 volts DC, a low battery alarm
is declared by the PIC. If battery voltage on the UIF PCB is measured below 5.67 ±
0.1 volts DC, 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-295 is powered by AC, the RS-232 Nurse Call function is available.
If no audible alarm conditions exist, the output will be -5 to -12 volts DC or +5 volts
DC to +12 volts DC. These voltages are dependent upon the option selected by the
use of the softkeys. Should an audible alarm occur, the output will change polarity.
The 331 also controls a set of dry contacts provided by a relay on the UIF PCB. The
relay will function normally on AC power or on the internal battery power.
When the CPU sends a tone request, three items are used to determine the tone that is
sent 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 pulse tone and alarm is user adjustable. Alarm volume can
11-5
Section 11: Technical Supplement
be adjusted from level 1 to level 10, with level 10 being the highest volume. Setting
the volume to zero can turn off pulse tones.
A real-time clock is provided by the NPB-295. A dedicated real-time clock chip
provides this.
User's interface includes the front panel display and the keypad. By pressing any of
nine keys on the keypad the operator can access different functions of the NPB-295.
The 331 will recognize the keystroke and make the appropriate change to the monitor
display to be viewed by the operator. The monitor uses any changes made by the
operator until it is turned off. Default values will be restored when the unit is
powered-on again.
Patient data is stored by the NPB-295 and can be downloaded to a printer through the
data port provided on the back of the monitor. An in-depth discussion of the data
port is covered in the Appendix of this manual.
PIC
The PIC controls the SpO2 function and communicates the data to the 331.
A pulse width modulator (PWM) function built into the processor controls the SpO2
function. 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 PIC converts these signals to digital values for %SpO2 and heart rate. The
values are sent to the 331 to be displayed and stored.
11.8.3 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 currents to the LEDs and the amplification in the signal
channel.
At initialization of transmission, the LEDs' 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 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 PIC.
11-6
Section 11: Technical Supplement
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.
De-multiplexing is accomplished by means of two circuits that alternately select the
IR and red signals. Two switches that are coordinated with the IR and red
transmissions control selection of the circuits. A filter with large time-constant
follows to smooth the signal and remove noise before amplification.
11.8.4 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-tonoise 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.
11.8.5 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 volts. Each circuit uses an amplifier and one switch in the triple
SPDT analog-multiplexing unit.
11.8.6 AC Ranging
In order to achieve a specified level of oxygen saturation measurement and to still
use a standard-type combined PIC 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 onefifth 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
PIC. The combined AC and DC signals for both IR and red signals are separately
input to the A/D converter.
11.8.7 Real-Time Clock (RTC)
Real time is tracked by the NPB-295. As long as battery power or AC power is
available, the instrument will keep time. If the battery is removed, the time clock will
have to be reset.
The LCD will display the time and date for the data period highlighted by the cursor
on a trend display. A time stamp is printed for each line of data on a printout. Realtime data is displayed and printed as Day, Month, Year, Hours, Minutes, and
Seconds.
11-7
Section 11: Technical Supplement
11.8.8 Patient Data Storage
Whenever the NPB-295 is turned on, it stores a “data point” in memory every 2
seconds (regardless of whether the NPB-295 is monitoring a patient or not). Up to 50
alarm limit changes will also be stored in trend data. The NPB-295 can store up to
24 hours of trend data. . The 24 hours of stored trend data is available for
downloading to Score software for 45 days. There are no limitations for displaying
or printing data.
Caution: Changing alarm limit settings uses up trend memory space. Change alarm
limits only as needed.
Note:
Note:
Trend memory always contains the MOST RECENT 24 hours of data, with newly
collected data over-writing the oldest data on a rolling basis. The NPB-295 continues
to record data points as long as the monitor is powered on, with “blank” data points
collected if no sensor is connected to the monitor or patient. “Blank” data will overwrite older patient data if the memory becomes full. Therefore, if you want to save
old patient data, it is important that you turn your monitor off when you are not
monitoring a patient, and that you download the trend memory, using Score software,
before it fills up and over-writes the old data with new data (or “blank” data).
When using Score software use the latest version. Contact Mallinckrodt’s
Technical Services Department or your local Mallinckrodt representative to
determine the latest version of Score software.
If battery power is disconnected or depleted, trend data and user settings will be lost. All data
is stored with error detection coding. If data stored in memory is found to be corrupted, it is
discarded.
11.9 FRONT PANEL DISPLAY PCB AND CONTROLS
11.9.1 Display PCB
The Front Panel LCD PCB provides visual patient data and monitor status.
At power up, all indicators and pixels are illuminated to allow verification of their
proper operation. Next, the Nellcor Puritan Bennett logo and the software revision
level are displayed. After this cycle has been completed, the instrument is ready to
begin monitoring.
The LCD allows the user to select among several different types of displays. Graphs,
which are used for trend screens, can be displayed. Real-time patient data can
include a plethysmographic waveform and digital values for SpO2 and BPM. If a
plethysmograph is not desired, the operator can select to view only digital data for
SpO2 and BPM along with a blip bar to show pulse intensity.
11.9.2 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. Nine keys allow
the operator to access different functions of the NPB-295.
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. Pressing the softkeys can access a number of other
functions. These functions are discussed in greater detail in Section 4.
11-8
Section 11: Technical Supplement
Five LEDs are also part of the membrane keypad. These LEDs indicate AC power
available, low battery, pulse search, alarm silence, and noise/motion.
11.10 SCHEMATIC DIAGRAMS
The following part locator diagrams and schematics are included in this section:
Figure 11-3: UIF PCB Front End Red/IR Schematic Diagram
Figure 11-4: Analog Front End Schematic Diagram
Figure 11-5: Front End Power Supply Schematic Diagram
Figure 11-6: SIP/SOP Interface Schematic Diagram
Figure 11-7: Data Port Drivers Schematic Diagram
Figure 11-8: CPU Core Schematic Diagram A
Figure 11-9: CPU Memory Schematic Diagram B
Figure 11-10: Contrast and Sound Schematic Diagram A
Figure 11-11: UIF PCB Power Supply Schematic Diagram B
Figure 11-12: Display Interface Schematic Diagram
Figure 11-13: UIF PCB Parts Locator Diagram
Figure 11-14: Power Supply Schematic Diagram
Figure 11-15: Power Supply Parts Locator Diagram
11-9
+10V
2
I52
1
3
+10V
Q18
2N3906S
I222
I20
C55
47P
50V
R49
49.9K
I13
I14
I27
R8
49.9K
C54
0.1U
50V
R14
249K
2N3906S
Q10
I28
2
-
3
+
-
8
4
1
3
4 U3
I15
AD822
+10V
DET+
+
6
2
1
R20
18.7K
5
8
C53
0.1U
50V
+
6
-
8
4
-
U22
LT1013S
I24
7
6
2
3
I12
-
R32
24.9K
U58
LP311D
6
7
4
R36
R39
10.0K
8
I18
R154
11.0K
I330
VREF
6
11
10
9
INH
A
B
C
V+
12
13
XO
X1
2
1
Y0
Y1
5
3
Z0
Z1
14
3
Y
15
Z
4
2
+10V
V+
R6
100K
8
7
6
4
5
I40
I32
I31
R5
249K
R26
174K
I90
R47
12.1K
I2
R3
374K
R46
374K
4
3
+
+
-
6
2
R7
10.0K
5
9
+
8
-
+
-
3
R43
10.0K
U10
TLC339CD
14
PIC_RB7
12
U27
LT1013S
I23
I55
R23
150K
I39
R4
24.9K
R11
100K
50V
C61
0.033U
+10V
I317
PIC_BRC7
PIC_RA1
1
+
+
-
6
I37
LT1013S
U23
7
R37
24.9K
C31
0.1U
50V
+10V
4
3
R35
49.9K
R117
24.9K
I38
R16
100K
2
C49
0.01U
VREF
I329
R41
10.0K
C62
0.01U
I33
+
+
-
+10V
6
2
I4
5
U23
LT1013S
I42
C63
0.01U
I25
R28
24.9K
5
+
4
-
+
3
R17
10.0K
U10
TLC339CD
2
PIC_RB6
- 12
I224
R27
150K
PIC_BRC6
C64
220P
50V
I35
VREF
-5V
I26
C60
220P
50V
C59
0.01U
-
I34
50V
R44
49.9K
I22
R19
100K
I8
8
-10V
16
-10V
I301
50V
C57
0.033U
U53
13 DG201S
5
C48
0.01U
+10V
+10V
7
-10V
14
4
R30
24.9K
V- GND
15
-
C30
0.1U
50V
C56
0.01U
U30
LT1013S
5
V+
8
I157
-
2
U53
DG201S
13
5
-10V C94
22P
4
CD4053S
I283
-
+
6
I6
R42
24.9K
V- GND
VEE 7
VSS
R45
1.10K
6
-
-
I19
-10V
+10V
+ LT1013S
+
+
11
4
I9
I36
100K
V- GND
U30
50V
C95
0.1U
50V
+10V
R31
24.9K
R40
249K
9
10
C65
1000P
U44
VCC 16
X
1
U53
DG201S
13
C66
0.1U
R9
174K
+10V
50V
C51
0.033U
U27
+
LT1013S
1
+ 6
7
I41
8
2
+10V
I5
R25
100K
50V
C50
0.033U
I21
R10
100K
I7
5
-10V
I10
I11
3
R1
24.9K
I30
1
V- GND
R2
2.74K
C52
47P
50V
13
1
+10V
I17
U53
DG201S
2
50V
U3
AD822
PIC_RB5
PIC_RB4
PIC_RA0
VREF
I331
V+
-10V
C58
22P
7
-10V R15
249K
PIC_RB2
PIC_RB1
PIC_RB3
+
5
-4
R12
150K
R34
49.9K
2
+8
+10V
R21
24.9K
+10V
-10V
I16
5
+
+
U22
LT1013S
-10V
-10V
I314
+
-
R18
49.9K
+10V
R22
30.1K
VREF
I305
DET-
1
3
I29
+10V
I3
R29
49.9K
2
R13
49.9K
+10V
+
R33
49.9K
R38
121
R24
100K
I1
PIC_RA2
PIC_RB3
PIC_RB1
PIC_RB2
ANALOG FRONT END
+10V
LED_IDRV
7
+
6
-
+
3
- 12
U10
TLC339CD
1
+10V
-10V
C2
C3
I226
0.1U
Z5U
0.1U
Z5U
DG201S BYPASS
035354
Figure 11-3
UIF PCB Front End Red/IR Schematic Diagram
11-11
VCC
I48
R192
10.0K
Q11
2
2N3906S
3
PIC_RC1
I68
VCC2N3906S
Q25
2
2N3906S
Q24
1
3
R54
10.0K
R75
20.0K
3
1
R74
20.0K
LED-
INH
A
B
C
12
13
XO
X1
R66
20.0K
Q2
MPSA06S
2
U2
6
11
10
9
3
I304
C74
4.7P
50V
2
1
Y0
Y1
5
3
Z0
Z1
VCC 16
X
14
Y
15
Z
6
+
LT1013S 2
U31
+
VREF
8
1
4
I69
I59
VREF
I60
I70
R68
174K
R67
100K
6
11
10
9
12
13
U1
INH
A
B
C
VCC 16
XO
X1
2
1
Y0
Y1
5
3
Z0
Z1
R64
80.6K
X
14
Y
15
Z
4
I73
VSS 8
C68
0.1U
R53
10.0K
VREF
I93
R94
10.0K
C4
Z5U
R52
10.0K
I74
R73
100K
3
1
2
I62
C72
0.1U
Q3
2N3904S
R72
174K
C70
0.1U
I61
R69
80.6K
1
3
Q4
2N3904S
2
C75
I82
R76
100K
VREF
DET+
LED+
RCAL
I302
R63
10K_0.1%
R57
100K
C71
0.1U
I75
4
3
C73
0.1U
+
+
-
6
I57
PIC_BRC0
VREF
+10V
I56
5
2
R60
30.1K
11
+
10
-
+
3
I81
PIC_RB2
PIC_RB3
PIC_RB4
PIC_RB5
PIC_RB6
PIC_RB7
I211
I45
R158
121
SCK
MISO
MOSI
I43
I91 I95
R51
221
HC49S
10MHZ
Y2
10MHZ
1
4
C76
33P
VREF
I50
50V
U31
LT1013S
1
Y4
2
R56
11.5K
C67
0.033U
VREF
VDD
MCLR
VSS1
VSS2
11
12
13
14
15
16
17
18
I80
FRONT_END_RST
15
LED-
20
1
8
19
RC0
RC1
RC2
RC3
RC4
RC5
RC6
RC7
I79
ATP-SM
16
I84
OSC1
OSC2
PIC16C63
PIC_RSTL
VREF
I58
9
10
Z5U
33P
2
21
22
23
24
25
26
27
28
I78
PIC_10MHZ
4053 BYPASS
0.1U
I49
035354
C1
0.47U
20V
C5
0.1U
R71
20.0K
R61
10.0
16
+
VEE 7
SPO2-29X
RB0
RB1
RB2
RB3
RB4
RB5
RB6
RB7
I223
VREF
CD4053S
I63
3
1
Q1
MPSA06S
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PIC_BRC1
I47
R70
10.0K
U11
RA0
RA1
RA2
RA3
RA4
RA5
2
3
4
5
6
7
I76
-5V
C69
0.1U
PIC_RB1
PIC_RA2
PIC_RA1
PIC_RA0
I77
I83
8
I298
I51
VREF
R188
49.9K
VEE 7
VSS
I88
I225
1
I54
R48
10.0K
I85
LED_IDRV
7
CD4053S
1
3
1N914S
I89
VREF
I87
CR10
R62
100K
VCC
I64
LED+
I303
I86
C6
Z5U
1
3
I53
R50
3.32K
0.1U
I65
Q9 2
MPSA56S
I46
2
R55
10.0K
1
I67
R65
20.0K
1
I71
2
MPSA56S
Q8
3
I66
U10
TLC339CD
13
I72
R58
10.0K
14
I44
I291
I92
U55
VCC
X
15
Y
4
Z
7
VEE
8
VSS
INH
A
B
C
6
11
10
9
PIC_RC0
PIC_RC6
PIC_RC7
XO 12
X1 13
Y0
Y1
2
1
Z0
Z1
5
3
C84
0.1U
Z5U
CD4053S
PIC_BRC7
PIC_BRC6
- 12
R59
10.0K
DETJ16
CON_SPO2
VREF
Figure 11-4
Analog Front End Schematic Diagram
11-13
VDD
C78
330P
50V
I110
CR11
1N914S
3
1
1
I108
+
C77
1000P
5%
C13
0.1U
Z5U
I114
VC
VIN
5
4
S/S
VSW
8
VSW
6
GNDS
FB
2
VFB
7
I113
C32
10U
16V
U50
GND
CLK_312KHZ
C33
47U
10V
2
C12
0.1U
Z5U
R83
49.9
1
1
6
+
3
20V
22U
C43
5
LT1373S
4
HIGH CURRENT
I126
I116
2
VCC
I120
2
VCC
C37
22U
20V
VIN
+
TP6
8
2
3
U12
VIN
VOUT 1
GND1
GND2
GND3 6
7
GND4
78L05D
CR2
MBRS130
+
C40
47U
10V
I119
RAW+10V
1
I98
74HC00S
2
C34
47U
10V
I117
+
RAW-5V
RAW-5V
I97
1
2
MBRS130
SH9 (CONTRAST)
RAW-10V
AGND
TP2
+
C36
47U
10V
RAW-10V
+10V
C38
22U
20V
TP4
C10
0.1U
Z5U
C41
47U
10V
CR4
I121
C8
0.1U
Z5U
I96
+
-5V
R79
49.9
MBRS130
SH9 (CONTRAST)
TP5
C9
0.1U
Z5U
CR6
I99
R87
1.0
5%
R81
49.9
2
R78
34.8K
VREF
1
+
10
C39
22U
20V TP7
7
U4
8
R80
182
1
+
8
I118
CR3
MBRS130
CR5
MBRS130
I100
R77
11.5K
9
+
3
NFB
R82
4.99K
RESETL
I115
T2
LPE-4841
C35
47U
10V
TP3
+
-10V
R86
49.9
C11
0.1U
Z5U
C42
22U
20V
+
CLK_156KHZ
VCC
16
9
PIC_10MHZ
C7
0.1U
Z5U
VCC
I127
U51
VCC
CP0
10
CP1
15
RST
Q0
Q1
Q2
Q3
GND
74HC4520S
11
12
13
14
8
I109
I107
I106
I320
16
1
I101
U51
VCC
CP0
2
CP1
7
RST
Q0
Q1
Q2
Q3
GND
74HC4520S
3
4
5
6
8
CLK_312KHZ
CLK_156KHZ
I104
I105
I103
R88
10.0K
035354
Figure 11-5
Front End Power Supply Schematic Diagram
11-15
VDD
I135
CLK_156KHZ
U9
3
4
5
SIPSOP_EN
9
74HC10S
VDD
I136
I133
11
C79
330P
50V
7
U14
VDD
I138
4
3
74HC14S
1
2
13
9
10
11
12
74HC10S
SDA
I155
+
T1
CR7
6
2
5
3
4
2
1
8
I149
14
2
I141
U9
5
2
I
1
7
4
6
3
Q6
SI9936
I148
MBRS130
7
5
7
U14
74HC14S
U18
R174
681
8
I140
5
7
U54
R194
681
3
8
TXD
U19
R175
681
3
VDD
R166
4.99K
TH
RXD
8
5
NC_RELAY
9
U15
74HC14S
8
7
I
ISCL
U15
74HC14S
ITX485_EN
6
5
7
IVDD
8
IVDD
I161
I
I158
14
13
14
12
7
R176
10.0K
I
11
U15
74HC14S
10
7
I
ITXD
U15
74HC14S
TH
IVDD
6
5
7
IVDD
R163
10.0K
I
6N136
2N3906S
Q26
U20
R165
453
3
6N136
VDD
I162
R109
10.0K
2
3
R164
10.0K
1
2N3906S
Q27
RCV_232
R110
10.0K
2
3
RCV_485
1
I164
I163
I
1
U6
6
NC_NO
R177
453
N.C.
AQV414A
NC_COM
NC_NC
5
4
VDD
2
VDD
I156
R195
10.0K
2
7
IVDD
6
7
I165
6
I
U15
74HC14S
TH
2
VDD
ISDA
4
7
14
5
I
6N136
IVDD
VDD
I
3
U15
74HC14S
R173
10.0K
I
2
TX485_EN
2
7
I160
SCL
I
I154
IVDD
IVDD
C18
0.1U
Z5U
14
1
I
C46
47U
10V
IVDD
I159
14
6N136
VDD
I
6
3
+
C19
0.1U
Z5U
4
2
Z5U
R171
10.0K
TH
2
74HC10S
+
IVDD
IVDD
R168
100
VDD
C17
0.1U
I152
OUT 3
IN
GND1 GND2
14
3
6
1
C44
47U
10V
TH
2
14
1
IVDD
U49
LT1129CST-5
6
6N136
VDD
5
8
U17
R172
681
IVDD
I151
MBRS130 CR8
C45
47U
10V
VDD
VDD
I139
C80
U14
330P74HC14S
50V
7
U14
U9
1
C16
0.1U
Z5U
7
I150
I153
IVDD
R170
1.00K
14
VDD
U14
Q6
VDD
74HC14S
13
8
1 SI9936
U14
14
12
7
2
74HC14S
74HC14S
I134
VDD
I137
R169
1.00K
14
8
7
I143
R167
100
14
6
10
I142
VDD
I132
1
C15
0.1U
Z5U
U7
6
I146
C14
0.1U
Z5U
N.O.
AQV210EHA
035354
5
4
2
I147
Figure 11-6
SIP/SOP Interface Schematic Diagram
11-17
RS-232 DRIVER
I243
IVDD
C21
0.1U
Z5U
I
RS-485 DRIVER
C22
0.1U
Z5U
I240
I241
C24
0.1U
Z5U
IVDD
I242
VCC
ITX485_EN
4
TXENAB
ITXD
5
TXIN
RXIN+
12 RXD+
12
R1OUT
ITXD
11
T1IN
9
NC_LVL
10
R1IN
10 TXD-
TXOUT+
9
RXD_232
TXD_232
R2OUT
R2IN
T2IN
V-
I168
GND
U5
ADM202E
15
I
TXD+
C23
0.1U
IVDD
CR9
2
I
10V
1
I244
3
CR19
2
I
1
CR16
2
1
CR13
2
U16
7
1
2
1
I
GND2
6
I167
NC_232
SMCJ10C
Z5U
GND1
8
T2OUT 7
6
TXOUT-
13
T1OUT 14
BAV99
RSROUT
C2-
RCV_232
I166
I
CMOS LEVEL
RS232 LEVEL
5
3
2
11 RXD-
I
BAV99
RCV_485
RXIN-
C1C2+
C26
0.1U
Z5U
VCC
3
RSENAB
3
4
16
V+
BAV99
3
C1+
3
RCV_232
C25
0.1U
Z5U
MAX489
1
BAV99
14
2
I238
CR26
RXD_232
J1
TXD_232
NC_232
TXD+
NC_NO
NC_COM
NC_NC
TXD-
IVDD
VDD
3
REF1 3
R179
1.00K
I169
C20
0.1U
Z5U
SCL
SDA
REF3
AD1
OUT0 2
AN0
11
AD2
OUT1 1
AN1
AGND
OUT2 16
AN2
DGND
OUT3
I
MAX520S
15
8
1
+
U32
C81
1.0U
20V
+
NC_LVL
U13
+
I
I
6
2
I
IVDD
I
8
TLE2425CD
VIN
VOUT
1
4
3
2
I
035354
+
U47
GND
U8
+
C27
0.1U
Z5U
R180
4.02K
0.1%
6
LT1013S
5
2 I172
REF_1V
U47
2
I
I
2
3
R181
6.04K
0.1%
+
R183
1.00K
7
1
IVDD
C83
1.0U
20V
+
6
F1
CR15
500MA
17
CON_DB15F
TH
TH
NC_NC
I
I
C97
0.1U
Z5U
I178
+ LT1013S
-
NC_COM
R191
100M
1/4W
TH
AN_SPO2
CR12
1
I174
C93
0.1U
Z5U
IVDD
IVDD
I171
I
I
NC_NO
AN_PULSE
CR14
R178
1.00K
7
IVDD
I170
2
I
LT1013S
2
2
10
I175
1
1
AD0
6
C82
1.0U
20V
13
9
5
I176
BAV99
8
IVDD
3
ISDA
REF2 14
2
7
+
U32
R182
1.00K
5
1
ISCL
+
6
-
BAV99
4
REF0 4
BAV99
8 BIT DAC
AN_PLETH
+ LT1013S
3
I173
3
12
+
AN_SPO2
Analog Outputs
IVDD
C47
47U
10V
AN_PULSE
I177
16
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
RXD+
RXD-
I
DT1
600V
TH
E
AN_PLETH
C145
0.1U
Z5U
I
I
IVDD
I
I
Figure 11-7
Data Port Drivers Schematic Diagram
11-19
I279
C133
0.1U
X7R
0805
C134
0.1U
X7R
0805
C127
0.1U
X7R
0805
C121
0.1U
X7R
0805
C124
0.1U
X7R
0805
C126
0.1U
X7R
0805
C123
0.1U
X7R
0805
C128
0.1U
X7R
0805
C129
0.1U
X7R
0805
VDD
RESETL
C125
0.1U
X7R
0805
/RESET
RP6
10K
I237
I236
1
2
3
4
I336
68
I219
BERRL
HALTL
POTCSL
L1
BATT_CHECK
A601
BK-LT-ONL
CRIT_BATT-L
L2
NC_RELAY
B601
L6
TX485_EN
B601
L8
B601
TXD
IRQ7L
I239
L11
SCK
MISO
MOSI
SIPSOP_EN
B601
PCS0L
I328
B601
8
7
6
5
8
7
6
5
L13
RP10
10K
53
52
RXD
TXD
45
43
44
46
47
48
49
SCK
MISO
MOSI
/PCS0-/SS
/PCS1
/PCS2
/PCS3
1
2
3
4
1
2
3
4
B601
L9
B601
BACKGROUND DEBUG CONNECTOR
I324
VDD
J15
1
3
5
7
2
4
6
8
CON_BDM8
035354
I334
PWMA
PWMB
PCLK
PAI
IC1
IC2
IC3
IC4/OC5
OC1
OC2
OC3
OC4
RP9
I333
10K
L10
RESETL
/IRQ1
/IRQ2
/IRQ3
/IRQ4
/IRQ5
/IRQ6
/IRQ7
/AVEC
130
129
128
4
15
14
13
5
12
11
10
6
I337
SCL
77
76
75
74
73
72
71
87
I125
RXD
SDA
/BERR
/HALT
I124
PWM_VOL
FONTSEL
AC_OK-L
LOW_BATT-L
BTN_PRS_L
RTCSEL
TURN_OFF
DISP_EN
RWD_RST
PWM_FREQ
CLRIII
AC_LED
VDD
70
69
BKPTL
FREEZE
IPIPE1
IPIPE0
I245
2
8
17
29
34
40
51
59
67
83
95
101
106
117
127
VSS1
VSS2
VSS3
VSS4
VSS5
VSS6
VSS7
VSS8
VSS9
VSS10
VSS11
VSS12
VSS13
VSS14
VSS15
68331
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19-/CS6
A20-/CS7
A21-/CS8
A22-/CS9
A23-/CS10
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
90
20
21
22
23
24
25
26
27
30
31
32
33
35
36
37
38
41
42
121
122
123
124
125
56
54
55
58
57
112
113
114
115
118
119
120
121
R/WLR
DSL
ASL
SDA2
SERCLK
SERDATA
ROMLATECSL
I112
VDDI
61
VDDSYN
C139
0.1U
Z5U
X1
GND 4
X2
DS1302Z
REAL TIME CLOCK
VDD
RP11
10K
TP58
R96
SCL
R155
4.99K
POTCSL
R/WL
DSACK0
DSACK1
VDD
I201
I207
6
SCL
SDA2
RA1
RA13
RA17
RROMLATECSL
R/WLR
RDSPLRDL
RPBCSL
RDSPLCSL
I209
I212
I313
I213
I229
I228
I230
I179
C136
10U
16V
SDA
1
2
3
A0
A1
A2
PWR
8
Z5U
0.1U
C132
GND 4
WP
CR29
2
BOOTROML
RAMLCSL
RAMHCSL
DSPLYCSL
I128
MAN_RST
2
PBCSL
3
I327
4
A601
1
VDD
VC1206
5.6V
Z5U
U46
1 PBRST
DSPLRDL
VCC 8
TD
TOL
ST
~RST
GND
R135
1.00K
7
RESETL
6
RST 5
I131
LTC1232
I129
+
128X8
SCL
AT24C01A
C131
0.1U
L4
U38
5
7
VDD
I231
XFC
2
C144
4.7P
50V
3
VDD
I205
I204
C130
0.1U
Z5U
8
1
RST
PWR1
I/O
PWR2
SCLK
FRONT_END_RST
CLKOUT I208
78
5
6
7
RTCSEL
SERDATA
SERCLK
I281
U43
49.9K
D[0:15]
I338
I339
I340
BKPTL
IPIPE0
IPIPE1
FREEZE
RP16
VDDI
120
RBOOTROML
4
5
RRAMLCSL
3
6
RRAMHCSL
2
7
RDSPLCSL
1
8
RDSPLRDL
R186
121
RPBCSL
PSLEDDR
121
R152
I312
VDDSYN
60
I197
R153
TP59
RAMPWR
I198
I308
A[17:0]
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
MODCLK
XTAL
I307
BATLEDDR
ASLEDDR
I282
MOTNLEDDR
R184 A17
RROMLATECSL 221
66
EXTAL 62
I306
R89
CLKOUT
XFC 64
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
111
110
109
108
105
104
103
102
100
99
98
97
94
93
92
91
R-/W 79
/DSACK0 89
/DSACK1 88
/DS 85
82
/AS
81
SIZ0
80
SIZ1
/RMC 86
/BKPT-DSCLK
IPIPE-DSO
IFETCH-DSI
FREEZE-QUOT
/TSTIME-TSC
/CSBOOT
/BR-/CS0
/BG-/CS1
/BGACK-/CS2
FCO-/CS3
FC1-/CS4
FC2-/CS5
R105
RA0 121
16
RA1
RP1 15
RA2
RA3
120 14
13
RA4
12
RA5
11
RA6
RA7
10
RA8
9
RA9
16
RP2 15
RA10
12014
RA11
RA12
13
RA13
12
RA14
11
RA15
10
RA16
9
RA17
121
I102
ECPSM29T
C120
0.1U
X7R
0805
C135
0.1U
X7R
0805
VDD1
VDD2
VDD3
VDD4
VDD5
VDD6
VDD7
VDD8
VDD9
VDD10
VDD11
VDD12
VDD13
Y3
C122
0.1U
X7R
0805
1
7
18
28
39
50
63
65
84
96
107
116
126
32.768KHZ
1
4
C137
47U
10V
I210
U45
8
7
6
5
+
A601
VDDI
8
7
6
5
L3
1
2
3
4
VDD
RWD_RST
I130
R151
221
WD_RST
C141
0.01U
I232
I234
R149
10.0M
I233
I235
R150
Y1
332K
32.768KHZ
4
1
C140
22P ECPSM29T
50V
C138
22P
50V
Figure 11-8
CPU Core Schematic Diagram A
11-21
VDD
I295
C91 + C119
0.1U
47U
Z5U
10V
A[17:0]
L12
FLASHPWR
VDD
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
I318
TP55
A601
11
10
9
8
7
6
5
4
42
41
40
39
38
37
36
35
34
2
33
R/WL
43
12
BOOTFLSHL
14
FLSHOEL
VDD
U42
128KX16
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
PWR
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
RY
BYTE
RESET
WE
CE
OE
23
RP3
16
15
14
13
12
11
10
9
15
17
19
21
24
26
28
30
16
18
20
22
25
27
29
31
RESETL
44
GND1 13
GND2 32
29F200
8
7
6
5
4
3
2
1
RP4
120
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D0
D8
D1
D9
D2
D10
D3
D11
D4
D12
D5
D13
D6
D14
D7
D15
120
FLASH
RAMPWR
1
3
5
ROMLATECSL
J14
R147
10.0K
2
4
6
L14
FRAMPWR
BOOTFLSHL
C101
0.1U
Z5U
A[17:0]
CON_3X2
BOOTROML
R146
121
VDD
R148
10.0K
I195
2
I278
U4
3
74HC00S
1
W-RL
2
U40
3
74HC32S
I144
1
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
RAMHCSL
22
RESETL 30
24
R/WL
29
I227
+
U41
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CEL
CEH
OE
WE
128KX8
PWR
D0
D1
D2
D3
D4
D5
D6
D7
C118
10U
16V
C28
0.1U
Z5U
32
13
14
15
17
18
19
20
21
D8
D9
D10
D11
D12
D13
D14
D15
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
RAMLCSL
RESETL
RAMOEDIS
R/WL
GND 16
431000S
12
11
10
9
8
7
6
5
27
26
23
25
4
28
3
31
2
22
30
24
29
U21
A0
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
CEL
CEH
OE
WE
I335
128KX8
PWR
D0
D1
D2
D3
D4
D5
D6
D7
GND
32
13
14
15
17
18
19
20
21
D0
D1
D2
D3
D4
D5
D6
D7
B601
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
I246
I247
I248
I252
I251
I250
I249
I256
I255
I254
I253
I260
I259
I258
I257
I280
I111
I276
I275
I274
I273
I269
I270
I271
I272
I265
I266
I267
I268
I261
I262
I263
I264
16
431000S
R/WL
RESETL
RAMHCSL
RAMLCSL
R156
10.0K
D[15:0]
035354
D[15:0]
Figure 11-9
CPU Memory Schematic Diagram B
11-23
VDD
I199
I310
PWM_FREQ
VDD
I321
U56
R99
6.49K
3
+
2
-
R93
4.99K
+ TLC27L2
8
R92
1.00K
1
C105
47U
10V
+
4
-
1
2
4
7
VDD
I309
PWM_VOL
I200
I311
R98
249K
R100
10.0K
+
C96
1.0U
20V
+
5
+
6
-
R102
100K
-
8
U56
I315
TLC27L2
7
U26
VCC
VI2
VI4
N.C.
+
C110
47U
10V
+
C104
47U
10V
+
TH
GND1 6
VO1 5
VO2 8
1
2
C106
47U
10V
C88
0.1U
J13
GND2 3
TDA7052A
R101
1.00K
SPEAKER DRIVER
4
VDD
DISP_EN
4
RESETL
5
I292
U4
I293
R95
10.0K
6
3
Q12
SI9933
4
6
74HC00S
5
I94
VDD
C87
0.047U
I180
TP40
2
VC1206
5.6V
1
CR32
I196
R198
11.5K
C92
0.1U
Z5U
U24
X9313 EPOT
TP44
R85
24.9K
VDD
I294
POTCSL
7
SERCLK
1
SERDATA
2
CS
VCC
INC
VH 3
4
VW 5
3
VL
U/ D
VSS
4
6
VDD
TP49
TP48
8
+
+
-
I277
6
U25
LT1013S
5
2
RAW-10V
R90
49.9K
R84
10.0K
8
1
+
+
-
6
U25
LT1013S
7
VEE
2
RAW-10V
RAW-5V
VDD
12
13
U4
11
74HC00S
035354
I332
C29
0.1U
Z5U
Figure 11-10
Contrast and Sound Schematic Diagram A
11-25
TP13
CR17
2
1
TP1
R119
249K
BATT
R203
10.0M
CON_4L_156
To Linear Power Supply
I216
R204
10.0K
I217
+
5
+
6
-
I323
+
2
-
8
4
+ C108
2
GNDVIA
HG1
AC_OK-L
1
R104
10.0K
Open Collector Output
Active Low Indicator
TP46
7
3
4
AC_OK
6
4
1
SI9953
Q16
2
5
8
R123
200K
C113
0.1U
100K
C116 R114
0.1U
CR30
1
VDD
CR1
C115
1.0U
20V
3
+
R121
20.0K
I184
BAT54
1
TURN_OFF
1
R202
10.0M
2
R127
49.9K
VDD
3
Q15
2N3904S
Critical at approx 5.68V
V_REF
8
+
2
-
8
-
R108
6.81K
6
R124
4.99K
+ LM393S
3
3_3V
TP42
1
Normally HIGH, active LOW
VDD
I187
R131
49.9K
I188
3
2
U37
LT1009S
Low at approx 5.85V
I220
R122
150K
+
5
+
6
-
8
4
U28
LM393S
7
R118
4.99K
TP43
TH
2
4
5
C112
0.1U
+
C107
470U
16V
TH
4
2
U29
PRE
D
I193
CLR
Q 6
GND 7
11
13
3
U29
PRE
D
I190
I194
14
VCC
Q 9
R103
49.9K
I202
1
BTN_PRS_L
3
2
CLK
CLR
Q13
2N3904S
I203
3_3V
12
I181
1
74HC74S
10
C85
0.1U
R97
49.9K
2
CLK
I186
R106
10.0K
I189
1
I192
VCC 14
Q 5
8
Q
GND 7
Q14
2N3904S
I191
74HC74S
1
CLRIII
5
4
R126
10.0K
CRIT_BATT-L
4
I185
C86
0.1U
R120
10.0K
R129
10.0K
U28
TP47
LM2940H
IN
OUT 3
G1 CS HS
3
3_3V
ONBUTTON
R128
4.99K
U36
3_3V
R111
10.0K
I183
I182
I218
GND
VDD TP39
3_3V
MBRS330T3
R107
200K
VDD
TP38
7
1
2
GNDVIA
HG2
Requires Heatsink NPB #891196
CR18
1N914S
Q16
3
1
SI9953
3_3V
C114
0.1U
C111
0.1U
TP41
BATT_CHECK
R125
100K
RAMPWR
1
10U
16V
1
2
+
3
2
35V
R115
10.0K
U35
LM393S
U35
LM393S
8
+ C109
OUT 1
GND
1
MAIN_OUT
4
3
2
1
IN
1U
R205
10.0M
3
1N914S
J6
3
VC1206
5.6V
1
VDD
R113
100K
100K
I322
CR27
I215
R116
MBRS130
CR31
VDD
R112
20.0K
CR20
U33
LT1121CZ
2
3
CR28
1N914S
1
MBRS330T3
CR21
MBRS130
MAIN_OUT
MAIN_DC1
Q17
2N3904S
R130
10.0K
LOW_BATT-L
Normally HIGH, active LOW
10.0M
R91
035354
Figure 11-11
UIF PCB Power Supply Schematic Diagram B
11-27
VDD
VDD
VDD
I122
R187
4.99K
MOTNLEDDR
ASLEDDR
2
I285
R140
4.99K
2
1
I284
R141
4.99K
BATLEDDR
PSLEDDR
1
2
1
R142
4.99K
2
1
I286
I287
3
3
3
2N3906S
Q19
3
2N3906S
Q28
I206
R136
10.0K
C89
0.1U
Z5U
R139
10.0K
2N3906S
Q20
2
8
BK-LT-ONL
I290
I123
I289
1
CR25
1N4934
2
1
CR24
Q12
1N4934
SI9933 2
1
7
TH
CCFL inverter
L5
100UH
CCFLPWR
TH
+
C143
+
47U
10V
C142
47U
10V
I288
2N3906S
Q21
4
2 GND1
CXA-L10
BATLED
I316
U40
9
A0
BK-LT-ONL
RESETL
CON_4L_098
VDD
R200
8
10
A601
121
74HC32S
DSPLRDL
VEE
12
R/WL
I319
U40
74HC32S
13
L7
16V
10U
C103
121
U40
4
I145
R201
11
DSPLYCSL
I325
R157
I326
6
5
74HC32S
FONTSEL
121
C98
+ 0.1U
J9
1
3
DSPLR/WL 5
DSPLYCSL 7
9
11
BD0
13
BD2
15
BD4
17
BD6
19
Z5U
2
4
6
8
10
12
14
16
18
20
VEE
DSPLRDL
DSPLA0
RESETL
BD1
BD3
BD5
BD7
CON_IDC20
D[15:0]
TO LCD DISPLAY
BDSPLYCSL
BD[7:0]
VDD
BD0
BD1
BD2
BD3
BD4
BD5
BD6
BD7
C99
0.1U
Z5U
R/WL
RP5
120
8
7
6
5
4
3
2
1
9
10
11
12
13
14
15
16
2
3
4
5
6
7
8
9
U39
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
D8
D9
D10
D11
D12
D13
D14
D15
18
17
16
15
14
13
12
11
ONBUTTON
3_3V
VDD
1
DIR
19
BDSPLYCSL
G
I297
CR22
8
7
6
5
AC_OK
8
7
6
5
74HC245S
RP8
10K
J8
ACPWRLED
2
4 PSLED
6
8
10
12
14
16
ASLED
1
BATLED 3
MOTNLED5
7
9
L19
B601
SOFTKEY4
11
13
DOWN_BTN L20
B601
15
17
L21
B601
ALRMSIL
CON_FLEX17
SOFTKEY2 L18 B601
CR34
L17
L15
L22
L16
B601
SOFTKEY1
B601
SOFTKEY3
B601
CNTRST
B601
UP_BTN
I343
I342
I341
I344
CR33
2
1
VC1206
5.6V
1
VC1206
5.6V
SOFTKEY1
SOFTKEY2
SOFTKEY3
SOFTKEY4
UP_BTN
DOWN_BTN
CNTRST
ALRMSIL
PBCSL
I296
AC_LED
I348
I347
I346
I345
2
3
4
5
6
7
8
9
VDD
ONBUTTON
1
19
1
3
I221
I214
D[15:0]
U34
A1
A2
A3
A4
A5
A6
A7
A8
B1
B2
B3
B4
B5
B6
B7
B8
18
17
16
15
14
13
12
11
CR23
1
3
1N914S
R143
100K
R132
4.99K
1N914S
RP7
10K
1
2
3
4
1
2
3
4
AC_OK
AC_LED
R144
10.0K
R189
200K
2
1
3
1
2
Q23
2N7002S
3
2N3906S
Q22
I300
I299
R145
82.5
ACPWRLED
D8
D9
D10
D11
D12
D13
D14
D15
DIR
G
74HC245S
VDD
VDD
295 MEMBRANE PANEL CONNECTOR
C100
0.1U
Z5U
035354
HV_OUT
5
GND2
J5
ASLED
PSLED
PBCSL
1
2
3
4
MOTNLED
R138
249
2
3
Turn off control
R133
249
R134
249
R137
249
A1
TH
1 VDD
C102
0.1U
Z5U
Figure 11-12
Display Interface Schematic Diagram
11-29
NELLCOR PURITAN BENNETT
NPB-290 MAIN BOTTOM SIDE
035351
Figure 11-13
UIF PCB Parts Locator Diagram
11-31
LINE_IN
5
8
EPS2PC3
TH
10
R2
100M
1/4W
TH
Power Entry
R5
C5
0.1U 15000U
1.00K
1/2W
35V
TH
TH
AC-
2ASB TH
+
C7
3
F2
FAC-
OB24-9
TH
NEUT_IN
1
R19
1.00K
1
+
TH
35V
100U
C9
1/4W TH
Main Board
R10
1.50
1/2W
TH
Battery Charge
C11
I5
R11
10.0K
0.1U
R22
10.0K
R21
73.2K
R20
10.0K
VOUT 2
I6
+
5
+
6
-
7
2
-
3
+
8
-
4
R8
1.00K
GND
TP2
1
2
I8
I2
4
Q2
IRF9510
TH
3
R3
10.0K
1
2
Q6
2N7002S
1
I12
I9
CR6
Requires Heat Sink
Nellcor # 891196
CR7
3
1N914S
1
1N914S
R6
100K
W6
R13
10.0K
1
I7
BATT_OUT
W8
I4
R16
10.0K
3
R25
10.0M
W9
CHG_IN
3
1
R14
10.0K
R7
154K
MAIN_DC
3
4
U2
LM385S
I1
0.1U
Q3
MPSA56
8
4
C10
2
W7
1
U1
+ LM358
I3
FAN_CTRL
R9
1.00K
BATT_CHK
2
-
TH
8
U1
LM358
C4
100P
TP1
R12
10.0K
VREF
LM35D
CR2
22V
SMCJ22C
R24
49.9
MAIN_DC
VIN
GND
CR1
1N4702
15V
TH
FAN_CTRL
TH
E
U3
R4
499
C8
0.01U
ESD Protection
1
3
2
To Fan
1
CON_2L
R23
10.0K
DT1
600V
3
CR5
22V
SMCJ22C
2
4
4
13
12
1
3
6
Fan Control
J1
Q5
MPSA56
2
C1
220P
250V
TH
2
6
I11
2
3
C6
0.01U
2ASB TH
I10
MAIN_DC
1
230V
SW1
2
Q1
TH
2N3904
HIGH CURRENT VIAS
1
7
9
T1
E3490A
TH
1
4
R1
390K
1/2W
TH
2
NEUTRAL
E
115V
FAC+
BR1
GBU8B
TH
2
W3
C2
4700P
250V
TH
15
AC+
F1
3
E
1
T2
1
W1
C3
220P
250V
TH
2
LINE
W2
3
Q4
2N3904
TH 1
R15
49.9K
2
CR4
SW2
MBRS330T3MTS50B
TH
CHG_OUT
NC
F3
BATT+
W4
Battery +
W5
Battery -
2ASB TH
BATT_CHK
R17
10.0K
035799
Figure 11-14
Power Supply Schematic Diagram
11-33
035800
Figure 11-15
Power Supply Parts Locator Diagram
11-35