Nellcor OxiMax NPB-40 Service Manual
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Nellcor OxiMax NPB-40 Service Manual

Handheld pulse oximeter
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Summary of Contents for Nellcor OxiMax NPB-40

  • Page 2 To obtain information about a warranty, if any, contact Nellcor’s Technical Services Department, or your local representative. Purchase of this instrument confers no express or implied license under any Nellcor Puritan Bennett patent to use the instrument with any sensor that is not manufactured or licensed by Nellcor Puritan Bennett.

  • Page 3: Table Of Contents

    C o n t e n t s Contents ........... .i Figures .
  • Page 4 Contents Troubleshooting Guide ..................33 Error Codes ......................37 Disassembly Guide ......... . 43 Introduction ......................
  • Page 5 Contents Power Supply ................81 Power Supply Monitoring ............81 Index ........... . 103 NPB-40...
  • Page 6 Contents F i g u r e s Figure 1: Installing Batteries ................12 Figure 2: SRC-MAX OXIMAX Oximetry Tester ..........24 Figure 3: Typical Error Code Display .............. 34 Figure 4: Installing Batteries ................44 Figure 5: NPB-40 Case Screws ..............44 Figure 6: Cases Separated ................
  • Page 7 Contents T a b l e s Table 1: Menu Structure ..................7 Table 2: Time Set Menu ..................8 Table 3: Troubleshooting Guide ..............34 Table 4: Error Codes ..................37 Table 5: Parts and Accessories List ..............55 Table 6: Electronic Emissions .................71 Table 7: Electromagnetic Immunity ..............72 NPB-40...
  • Page 8 Tables This Page Intentionally Blank...

  • Page 9: Introduction

    I n t r o d u c t i o n Warnings Warnings are identified by the WARNING symbol shown above. Warnings alert the user to potential serious outcomes (death, injury, or adverse events) to the patient or user. WARNING: The sensor uses the date and time provided by the NPB-40 handheld pulse oximeter when the sensor event record is recorded by the sensor.

  • Page 10: Cautions

    Notes provide useful helpful information. Manual Overview This manual contains information for service personnel who will service the Nellcor model O NPB-40 handheld pulse oximeter (herein referred to as the NPB-40). Only qualified service personnel should service this product. Read the operator's manual carefully and thoroughly understand the operation of the NPB-40.

  • Page 11: Description Of Npb-40

    Introduction Description of NPB-40 The O NPB-40 handheld pulse oximeter (herein referred to as the NPB-40) is indicated for non-invasive, spot-check measurements of functional arterial oxygen saturation (SpO ) and pulse rate of adult, pediatric, and neonatal patients. It can be used in hospital, emergency, transport, and mobile environments, as well as in the home care environment.
  • Page 12 Introduction 5 — indicator %SpO2 Lower Alarm Limit 6 — indicator %SpO2 Upper Alarm Limit 7 — indicator (blip bar) Pulse Amplitude 8 — colon time/date field separator Time 9 — mode indicator Adjust Time 10 — mode indicator Adjust Volume 11 —...
  • Page 13 Introduction 17 — indicator BPM Lower Alarm Limit 18 — indicator Print 19 — indicator Motion 20 — indicator Pulse Beep Tone Volume Adjust 21 — indicator Pulse Search 22 — indicator Alarm Volume Adjust 23 — indicator Data In Sensor 24 —...

  • Page 14: Function Menu

    Introduction 27 — button Power 28 — button Up Arrow 29 — button Backlight 30 — button Menu 31 — (record/print) button Data 32 — button Down Arrow 33 — button Alarm Silence Function Menu Pressing the Menu button repeatedly during normal operation sequentially shows seven parameter-setting displays, one for each button activation, and then returns to the default monitoring display.

  • Page 15: Structure

    Introduction Structure Table 1: Menu Structure # of Parameter Press Function Presses Adjust limit Limit Adjust limit High Limit BPM Low Adjust limit Limit BPM High Adjust limit Limit Pulse Beep Adjust volume. Indications Volume on blip bar. Alarm Adjust volume. Indications Volume on blip bar.

  • Page 16: Table 2: Time Set Menu

    Introduction Table 2: Time Set Menu # of Parameter Press Function Presses must be pressed during the NPB-40 POST. Hour Adjust 1 to 23 Minute Adjust 1 to 59 Adjust 1 to 31 Month Adjust 1 to 12 Year Adjust 2003 to 2099 When the month entry is made, the NPB-40 checks the day selection to see if it is correct.

  • Page 17: Related Documents

    NPB-40. Refer to the NPB-40 operator's manual. To understand the various Nellcor approved O sensors that work with the NPB-40, refer to the individual O sensor's Directions For Use.
  • Page 18 Introduction This Page Intentionally Blank...

  • Page 19: Routine Maintenance

    The following checks should be performed at least every 24 months by a qualified service technician. 1. Inspect the equipment for mechanical and functional damage. 2. Inspect safety labels for legibility. If the labels are damaged, contact Nellcor’s Technical Services Department, 1.800.635.5267, or your local Nellcor representative.

  • Page 20: Battery Installation

    Routine Maintenance Battery Installation Caution: The NPB-40 does not operate with dead batteries. Install new batteries. 1. Press Power to turn the NPB-40 off. 2. Pull the battery compartment latch downward, toward the bottom of the NPB-40, and remove the battery access door. See Figure 1. 3.
  • Page 21 Routine Maintenance WARNING: As with all medical equipment, carefully route patient cabling to reduce the possibility of patient entanglement or strangulation. WARNING: To ensure accurate performance and prevent device failure, do not expose the NPB-40 to extreme moisture such as rain. NPB-40...
  • Page 22 Routine Maintenance This Page Intentionally Blank...

  • Page 23: Performance Verification

    Caution: If any indicator or display element does not light when the NPB-40 is turned on, do not use the NPB-40. Instead, contact qualified service personnel, your local Nellcor representative, or Nellcor’s Technical Services Department. Note: Physiological conditions, medical procedures, or external agents that may interfere with the NPB-40’s ability to detect and show measurements,...

  • Page 24: Procedure

    Performance Verification pigment, and externally applied coloring agents such as nail polish, dye, or pigmented cream. Note: The NPB-40 automatically starts the Power-On Self-Test (POST), which tests the NPB-40 circuitry and functions. Caution: During POST (immediately after power-up), confirm that all display segments and icons are shown, and the NPB-40 speaker sounds a one-second tone.
  • Page 25 Note: The software version shown above is only a sample. Check your NPB-40 for the software version installed. Note: Software version numbers are often needed when calling Nellcor’s Technical Services Department or your local Nellcor representative for technical assistance. Write down the software version number and have it available prior to requesting technical assistance.
  • Page 26 Performance Verification 5. The current time is shown in a 24-hour format. 6. If the NPB-40 detects an internal problem during POST, an error tone sounds and the NPB-40 shows an error code (Er) and the corresponding error number (see Troubleshooting on page 33). 7.

  • Page 27: Operational Setup

    Performance Verification 8. Press the Alarm Silence button. The Alarm Silenced indicator is displayed. 9. Press the Alarm Silence button. The Alarm Silenced indicator is not displayed. 10. Press the Backlight button. The backlight turns on. 11. Press the Backlight button. The backlight turns off. Operational Setup The operational setup procedure sets the time and date into the NPB-40.

  • Page 28: Setting The Time And Date

    Performance Verification Setting the Time and Date Discussion WARNING: The sensor uses the date and time provided by the NPB-40 handheld pulse oximeter when the sensor event record is recorded by the sensor. The accuracy of the date/time is dependent on the date/time already set in and provided by the NPB-40.
  • Page 29 Performance Verification 5. Press the Menu button to set the hours and show the minutes set display. The minutes indication (45) flashes. 6. Press the Up Arrow button or the Down Arrow button until the desired minutes are shown. 7. Press the Menu button to set the minutes and show the day set display. The day indication (29) flashes.
  • Page 30 Performance Verification 9. Press the Menu button to set the day and show the month set display. The month indication (7) flashes. 10. Press the Up Arrow button or the Down Arrow button until the desired month is shown. 11. Press the Menu button to set the month and show the year set display. The year indication (2004) flashes.

  • Page 31: General Operation

    Patient monitoring involves connecting the O sensor to a live subject for a qualitative test. Sensor Port — 1. Connect a Nellcor O MAX-A oxygen O sensor to the NPB-40. 2. Clip the MAX-A to the subject as recommended in the O sensor's Directions For Use.

  • Page 32: Pulse Oximetry Functional Tests

    Performance Verification Pulse Oximetry Functional Tests These tests utilize the pulse oximetry functional tester (Nellcor model SRC-MAX) to verify the performance of the NPB-40. See Figure 2. These tests should be done in sequence. 1 — NPB-40 Cable Connector 6 — % Modulation Select Button 2 —...

  • Page 33: Test Setup

    Performance Verification blood oxygen saturation. The test setup procedure sets up Test 2 for 75 percent blood oxygen saturation. • Test 3: Modulation — This procedure simulates an O sensor attached to a patient indicating low and high pulse strength. The test setup procedure sets up Test 3 for low pulse strength.

  • Page 34: Test #1: Bpm

    Performance Verification • Pulse Amplitude indicator - show low level modulation (low amplitude pulse amplitude indicator) Test #1: BPM 1. Press the SRC-MAX % PULSE RATE selection button. The SRC-MAX PULSE RATE 200 LED lights. 2. The NPB-40 bpm increases to 200 and stabilize at 200 bpm. The test pass criteria is 197 to 203 bpm inclusive.

  • Page 35: Test #2: Spo2

    Performance Verification 5. The NPB-40 pulse rate decreases to 60 and stabilize at 60 bpm. The test pass criteria is 57 to 63 bpm inclusive. 6. The NPB-40: • displays 75 %SpO • displays 60 bpm (test pass criteria is 57 to 63 bpm inclusive) •...

  • Page 36: Test #3: Modulation Level

    Performance Verification 5. The NPB-40 shows two dashes until the SRC-MAX stabilizes at 75 %SpO The test pass criteria is 73 to 77 %SpO inclusive. 6. The NPB-40: • displays 75 %SpO (pass criteria is 73 to 77 %SpO inclusive) •...

  • Page 37: Test #4: Light Level

    Performance Verification 5. Perform Test #2: SpO2 on page 27. The Pulse Amplitude indicator should indicate high level modulation. 6. Press the SRC-MAX % MODULATION selection button. The SRC-MAX % LED lights. MODULATION 7. The NPB-40 pulse blip bar decreases in amplitude. 8.
  • Page 38 Performance Verification 2. The NPB-40 pulse blip bar initially increases in amplitude and then stabilize. 3. The NPB-40 • displays 75 %SpO (test pass criteria is 73 to 77 %SpO inclusive) • displays 60 bpm (test pass criteria is 57 to 63 bpm inclusive) •...

  • Page 39: Safety Tests

    Performance Verification • pulse amplitue indicator displays low level modulation 9. Perform Test #1: BPM on page 26. The pulse amplitue indicator should indicate low level modulation. 10. Perform Test #2: SpO2 on page 27. The pulse amplitue indicator should indicate low level modulation.
  • Page 40 Performance Verification This Page Intentionally Blank...

  • Page 41: Troubleshooting

    Note: Follow the recommended actions discussed in this section to correct the majority of problems you may encounter. However, problems not covered here can be resolved by calling Nellcor’s Technical Services or your local Nellcor representative. If you encounter a problem that cannot be resolved through a visual inspection, refer to Table 3 which provides troubleshooting support.

  • Page 42: Figure 3: Typical Error Code Display

    Troubleshooting If an error code is shown on the NPB-40 front panel display, see Figure 3,turn the NPB-40 off, wait ten seconds, then turn the NPB-40 on. This clears recoverable errors encountered by the NPB-40. If the error code still persists, refer to Table 4 for the indicated failure.
  • Page 43 Troubleshooting Table 3: (Continued) Troubleshooting Guide Condition Recommended Actione • A CPU PCB Component has failed. Inspect the CPU PCB components and circuit board for cracking, burning, or damage and replace the CPU PCB if any are found. See CPU PCB or Display PCB Replacement on page 46.
  • Page 44 Troubleshooting Table 3: (Continued) Troubleshooting Guide Condition Recommended Actione • The CPU PCB is defective. Replace the CPU PCB with a known good PCB. See CPU PCB or Display PCB Replacement on page 46. The display backlight does not come on when the button is pressed.

  • Page 45: Error Codes

    Troubleshooting Table 3: (Continued) Troubleshooting Guide Condition Recommended Actione • Flex circuit between the front panel and Inspect the flex circuit and reconnect if the flex circuit is the CPU PCB is disconnected. loose. See Separating the Front and Back Cases on page 44. •...
  • Page 46 Troubleshooting Table 4: Error Codes (Continued) Scope of Action Error Action Explanation Code Replace SpO board. front end reported illegal value sent in FSP message. Replace SpO board. front end reports calibration (offset) failure. Replace SpO board. front end reported syntax error in FSP message.
  • Page 47 Troubleshooting Table 4: Error Codes (Continued) Scope of Action Error Action Explanation Code Replace SpO board. back end reports end of packet missing. Replace SpO board. back end reports packet contains unidentified key. Replace SpO board. back end reports corrupted variable.
  • Page 48 Troubleshooting Table 4: Error Codes (Continued) Scope of Action Error Action Explanation Code Replace UI board. Unrecoverable error verify real time clock. Replace batteries. Battery power is critically low. Replace batteries. System power levels unacceptable for continued operation. 1, 2 1 —...
  • Page 49 Troubleshooting Table 4: Error Codes (Continued) Scope of Action Error Action Explanation Code Set time and date. Invalid time. Cannot snapshot. Replace UI board. Invalid register value. Replace UI board. Watchdog protection activated. NPB-40...
  • Page 50 Troubleshooting This Page Intentionally Blank...

  • Page 51: Disassembly Guide

    D i s a s s e m b l y G u i d e Introduction The NPB-40 can be disassembled into to all major component parts, including: • Front case with front panel keypad • Rear bottom • Display PCB •...

  • Page 52: Separating The Front And Back Cases

    Disassembly Guide 2. Remove the battery cover: pull the battery cover latch downward toward the bottom of the NPB-40 case and lift the battery cover. See Figure 4, item 1. 3. Remove the batteries. Batteries 1 — Battery cover 2 — Battery cover latch 3 —...

  • Page 53: Figure 6: Cases Separated

    Disassembly Guide Caution: A cable runs between the NPB-40 front and rear case assemblies. Use care when separating the cases. Do not apply stress to the cable. 3. Separate the NPB-40 front and rear case assemblies. See Figure 6. 1 — Connector J3 Figure 6: Cases Separated Caution: Failure to unlock connector J3 on the CPU PCB before attempting to remove the front case flex circuit could damage the flex circuit.

  • Page 54: Cpu Pcb Or Display Pcb Replacement

    Disassembly Guide CPU PCB or Display PCB Replacement Do the following procedure to replace the CPU PCB or the display PCB. 1. Do the procedure in paragraph Prior to Disassembly on page 43. 2. Do the procedure in paragraph Separating the Front and Back Cases on page 44.

  • Page 55: Figure 9: Separating The Display Pcb And Cpu Pcb

    Disassembly Guide 4. Separate the display PCB from the CPU PCB. See Figure 9. 1 — J1 2 — Display PCB 3 — J2 4 — CPU PCB Figure 9: Separating the Display PCB and CPU PCB 5. Place the defective PCB to the side. 6.

  • Page 56: Figure 11: Battery Spring Alignment

    Disassembly Guide 7. Install the display PCB and CPU PCB into the NPB-40 case. Ensure that the battery springs slip into place. See Figure 11. Figure 11: Battery Spring Alignment Note: The longer screws install at the top of the case. See Figure 12, items 1 and 4.

  • Page 57: Front Case Assembly Replacement

    Disassembly Guide 10. Install the batteries and battery cover. See Figure 13. Batteries 1 — Battery cover 2 — Battery cover latch 3 — Figure 13: Battery Installation 11. Perform the performance verification tests before placing the NPB-40 into service. See Pulse Oximetry Functional Tests on page 24. Front Case Assembly Replacement The front case assembly contains the keypad.

  • Page 58: Figure 14: Front Case Ribbon Cable Connection

    Disassembly Guide 4. Connect the new front case assembly ribbon cable to the CPU PCB connector J3. See Figure 14. 1 — J3 Figure 14: Front Case Ribbon Cable Connection 5. Lock the ribbon cable connector. See Figure 15. 1 — CPU PCB 2 —...

  • Page 59: Figure 16: Installing The Case Screws

    Disassembly Guide 6. Place the front and rear cases together and install the four screws. See Figure 16, items 1 through 4. Figure 16: Installing The Case Screws 7. Install the batteries and battery cover as shown in Figure 17. Batteries 1 —...

  • Page 60: Rear Case Assembly Replacement

    Disassembly Guide Rear Case Assembly Replacement Perform the following procedure to replace the rear case assembly. 1. Remove the batteries from the NPB-40. See Prior to Disassembly on page 43. 2. Separate the front and rear case assemblies. See Separating the Front and Back Cases on page 44.

  • Page 61: Figure 19: Battery Spring Alignment

    Disassembly Guide 5. Install the display PCB and CPU PCB into the NPB-40 case. Ensure that the battery springs slip into place. See Figure 19. Figure 19: Battery Spring Alignment Note: The longer screws install at the top of the case. See Figure 20, items 1 and 4.

  • Page 62: Battery Compartment Door Replacement

    Disassembly Guide 7. Install the batteries and battery cover. See Figure 21. Figure 21: Battery Installation 8. Perform the performance verification tests before placing the NPB-40 into service. See Pulse Oximetry Functional Tests on page 24. Battery Compartment Door Replacement Perform the following procedure to replace the battery compartment door.

  • Page 63: Spare Parts

    Nellcor's Technical Services provides technical assistance information and replacement parts. To obtain replacement parts, contact Nellcor's Technical Services or your local Nellcor representative. Refer to parts by the part names and part numbers. Spare parts and accessories for the NPB-40 are listed on the Internet at: http://mallinckrodt.com/respiratory/resp/Serv_Supp/Apartweb/main/PartAcceMenu.html...
  • Page 64 Spare Parts Table 5: Parts and Accessories List (Continued) Figure 23 Description Reference DEC-4 sensor extension cable Home Use Guide, English Jacket, water resistant, clear, plastic Operator’s manual, Chinese Operator’s manual, Czechoslovakian Operator’s manual, Danish Operator’s manual, Dutch Operator’s manual, English Operator’s manual, Finnish Operator’s manual, French Operator’s manual, German...

  • Page 65: Figure 23: Exploded View

    Spare Parts Figure 23 shows the NPB-40 expanded view with numbers relating to the spare parts list. Figure 23: Exploded View NPB-40...
  • Page 66 Spare Parts This Page Intentionally Blank...

  • Page 67: Packing For Shipment

    Return the NPB-40 by any shipping method that provides proof of delivery. Pack the NPB-40 carefully. Failure to follow the instructions in this section may result in loss or damage not covered by any applicable Nellcor warranty. If the original shipping carton is not available, use another suitable carton; North American customers may call Nellcor’s Technical Services Department to obtain...

  • Page 68: Packing In A Different Carton

    Packing for Shipment 1. Place the NPB-40 original packaging. Figure 24: Packing 2. Place in shipping carton and seal carton with packing tape. 3. Label carton with shipping address, return address, and RGA number. Packing in a Different Carton If the original carton is not available, use the following procedure to pack the NPB-40: 1.
  • Page 69 Packing for Shipment 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. NPB-40...
  • Page 70 Packing for Shipment This Page Intentionally Blank...

  • Page 71: Specifications

    S p e c i f i c a t i o n s Performance Measurement Range 1% to 100% Pulse Rate 0, 20 beats per minute (bpm) to 300 bpm Perfusion Range 0.03% to 20% Accuracy and Motion Tolerance Saturation 70 to 100% ±2 digits Without Motion...
  • Page 72 Specifications Audible Indicators Audible Parameter Value Indicator Alarm Volume Volume level Adjustable, 40 to 52 Setting dB(A), at one meter Pitch (±30 Hz) 752 Hz On pulse width 500 msec (±20 msec) Off Interval (±20 msec) 10 msec Number of pulses in burst 1 Repetition Pause (±2 sec.) Priority...
  • Page 73 Specifications Audible Indicators (Continued) Audible Parameter Value Indicator Confirmation Volume level Fixed at 45 dB(A), at one meter Pitch (±30 Hz) 700 Hz On pulse width 130 msec (±20 msec) Off Interval (±20 msec) 130 msec Number of pulses in burst 3 Repetition Pause (±2 sec.) Priority...
  • Page 74 Specifications Audible Indicators (Continued) Audible Parameter Value Indicator High Priority Volume level Adjustable, 42 to 52 Alarm dB(A), at one meter Pitch (±30 Hz) 1200 Hz On pulse width 250 msec (±20 msec) Off Interval (±20 msec) 80 msec Number of pulses in burst 1 Repetition Pause 0 sec.

  • Page 75: Electrical

    Specifications Electrical Batteries The batteries provide at least 15 hours of battery life with no alarms, no printing, and with backlight on while using a pulse simulator set for 200 bpm, high light and low modulation. Type 4 AA alkaline Voltage 1.5 Volts DC (each) Sensors...

  • Page 76: Environmental Conditions

    Specifications Environmental Conditions Operation Temperature 5 ºC to 40 ºC (41 ºF to 104 ºF) Altitude 390 m to 3,012 m ( 1,254 ft. to 9,882 ft.) Atmospheric Pressure 70 kPa to 106 kPa (20.6 in. Hg to 31.3 in. Hg) Relative Humidity 15% to 95% non condensing...

  • Page 77: Physical Characteristics

    Specifications Physical Characteristics Weight 0.62 lbs. (0.28 kg) Dimensions 2.875 in. x 6.25 in. x 1.375 in. (7.3 cm x 15.9 cm x 3.5 cm) Compliance Item Compliant With Equipment classification Safety Standards: EN 60601-1: 1990 (A1 + A2), EN 60601-1-2: 2001, UL 60601-1, CAN/CSA C22.2 No.
  • Page 78 Specifications The NPB-40 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or user of the NPB-40 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the NPB-40 as recommended below, according to the maximum output of the communications equipment.

  • Page 79: Table 6: Electronic Emissions

    Specifications Table 6: Electronic Emissions The NPB-40 is intended for use in the electromagnetic environment specified below. The customer or user of the NPB-40 should assure that it is used in such an environment. Electromagnetic Emission Test Compliance Environment - Guidance RF emissions Group 1...

  • Page 80: Table 7: Electromagnetic Immunity

    Specifications Table 7: Electromagnetic Immunity The NPB-40 is intended for use in the electromagnetic environment specified below. The customer or user of the NPB-40 should assure that it is used in such an environment. Immunity Test IEC 60601 Compliance Electromagnetic Test Level Level Environment...
  • Page 81 Specifications Table 7: Electromagnetic Immunity (Continued) The NPB-40 is intended for use in the electromagnetic environment specified below. The customer or user of the NPB-40 should assure that it is used in such an environment. Field strengths from fixed RF transmitters, as determined by an electromagnetic site survey , should...
  • Page 82 Specifications This Page Intentionally Blank...

  • Page 83: Technical Discussion

    T e c h n i c a l D i s c u s s i o n Oximetry Overview The NPB-40 uses pulse oximetry to measure functional oxygen saturation in the blood. Pulse oximetry works by applying an O sensor to a pulsating arteriolar vascular bed, such as a finger or toe.

  • Page 84: Measured Versus Calculated Saturation

    Figure 25: Oxyhemoglobin Dissociation Curve SatSeconds Alarm Management The NPB-40 utilizes Nellcor SatSeconds alarm management technique. SatSeconds is a function of the software within the NPB-40. With the SatSeconds technique, upper and lower alarm limits are set in the same way as traditional alarm management.

  • Page 85: Reads Through Motion

    For a definition of motion, as applicable to the NPB-40, contact Nellcor's Technical Services Department. Technology The NPB-40 is designed to use Nellcor brand O sensors containing O technology. These O sensors can be identified by the deep blue color of their plug.

  • Page 86: Spo2 Printed Circuit Board

    Technical Discussion The NPB-40 consists of two printed circuit boards (PCB), the user interface PCB and the SpO PCB. The relationship between these two components and their interconnections is shown in the NPB-40 block diagram. See Figure 26. Figure 26: Block Diagram Printed Circuit Board The SpO PCB provides patient interface and NPB-40 operating power.

  • Page 87: Power Supply

    Technical Discussion Power Supply The power supply provides operating voltages to the SpO PCB and the user interface PCB. These voltages are supplied to the: • PCB power monitoring function • PCB circuits • user interface PCB power supply • user interface PCB CPU •...

  • Page 88: Keypad

    Technical Discussion Keypad The user interface PCB keypad contains seven push buttons. These buttons allow the user to setup and control of the NPB-40. The buttons are: 1 — Alarm Silence 5 — Backlight 2 — Down Arrow 6 — Up Arrow 3 —...

  • Page 89: Lcd

    Technical Discussion The liquid crystal display (LCD) is driven by the CPU. The LCD displays the patient’s %SpO and pulse rate. The LCD also displays icons indicating the status and functions of the NPB-40. Refer to the NPB-40 Operator’s manual for a description of the icons.
  • Page 90 Technical Discussion This Page Intentionally Blank...

  • Page 91: Figure 27: Spo2 Pcb Schematic Diagram (Sheet 1 Of 7)

    Technical Discussion +5VRDIG 698K T177 +5VRDIG C105 0.1uF 301K T176 T178 RXD5V SPO2_TXD 2506033017Y0 C106 MAX9100 +12VR T131 100pF C107 VBATTERY 2 0.1uF C108 +5VRDIG 0.1uF 4.7U T182 HEADER 12X2 R110 T181 49.9K DOWN_ARROW MENU KEYPD7 KEYPD6 UP_ARROW A L A R M _ O F F KEYPD5 KEYPD4 WRITE_TO_MEMORY...
  • Page 92 Technical Discussion This Page Intentionally Blank...

  • Page 93: Figure 28: Spo2 Pcb Schematic Diagram (Sheet 2 Of 7)

    Technical Discussion T164 T165 T173 R109 BAT_POS VON 1,3 PTC1812 C104 IRLML6401 R102 C101 IRLML6401 4.7U TVS1 221K R103 SMCJ7.0C 221K BAT_NEG R106 100K IRLML6401 T166 T167 R101 BAT54SWT1 VBATTERY 301K R105 100K T170 T174 T175 M P S A 0 6 S T168 T169 BSS138...
  • Page 94 Technical Discussion This Page Intentionally Blank...

  • Page 95: Figure 29 Spo2 Pcb Schematic Diagram (Sheet 3 Of 7)

    Technical Discussion +5VDIG +5VRDIG +5VDIG -> J6 pin 13 T135 T133 T136 (MP506) (sheet 7) +5VRDIG -> RP14 pin 2 (this sheet) VOUT +5VRDIG -> 232 level shifters (sheet 1) +5VRDIG -> R99 (sheet 1) 10uH MBR0520L T134 4.7U 1.0M 0.01U LT1761ES5-5 4.7pf...
  • Page 96 Technical Discussion This Page Intentionally Blank...

  • Page 97: Figure 30: Spo2 Pcb Schematic Diagram (Sheet 4 Of 7)

    Technical Discussion RP1 100 AT91R40807 Place caps as close as practical to U22, two per side V D D A0/NLB V D D V D D RP2 100 V D D 0.1U 0.01U 0.01U 0.1U 0.01U 0.01U 0.1U 0.1U V D D FLASH PROGRAM MEMORY V D D V D D...
  • Page 98 Technical Discussion This Page Intentionally Blank...

  • Page 99: Figure 31: Spo2 Pcb Schematic Diagram (Sheet 5 Of 7)

    Technical Discussion +2.5 1.00M 0.022U +2.5 +2.5 66.5K +2.5 U25A MAX4053Q LT1013S 140K M A X 9 7 0 Q M A X 9 7 0 Q RP11 24.9K PIC_RB2 220P 95.3K V C C +2.5 200K PIC_RC3 RP25 0.022U 49.9K 0.01U 0.01U...
  • Page 100 Technical Discussion This Page Intentionally Blank...

  • Page 101: Figure 32: Spo2 Pcb Schematic Diagram (Sheet 6 Of 7)

    Technical Discission T120 +2.5 RP24 +5ANALOG U14A LT1013S SENSOR_DISCONNECT MBT3906DW 49.9K Q 1 A MBT3906DW +5ANALOG T121 BAT54SWT1 100K MBT3904DW RP12 4.7P PIC_RA2 0.1U V C C V C C PIC_RED_IR5V 7 +2.5 U14B M P S A 5 6 S LT1013S M P S A 5 6 S PIC_RA1 5...
  • Page 102 Technical Discussion This Page Intentionally Blank...

  • Page 103: Figure 33: Spo2 Pcb Schematic Diagram (Sheet 7 Of 7)

    Technical Discussion SPO2 Side +5DIG +5ANALOG +5ANALOG 5V to 3V LEVEL SHIFTER 2512063017Y0 2512063017Y0 RP17 100 U19A RXD5V RXD5V PIC_RX3V RXD3V 4 PIC_RX5V 6 PIC_TX5V PIC_TX3V 4 TLC3702C PIC_RED_IR5V DIGICAL_IN5V PIC_RED_IR3V 4 +12V PIC_SYNC5V RP16 DIGICAL_IN3V 4 3V to 5V LEVEL +5VDIG SHIFTERS RP18 100...
  • Page 104 Technical Discussion This Page Intentionally Blank...

  • Page 105: Figure 34: User Interface Pcb Schematic Diagram (Sheet 1 Of 3)

    Technical Discussion 0.1uF TC1034ECT 1V21B 0.1uF ITH/RUN SENSE- LT1761ES5-1.8 10uH LTC1779ES6 MBR0520L 221K 47uF 0.1uF 4.7uF 0.01uF 100pF 0.1uF V5DIG V 5 A C K 0.1uF 0.1uF 82.5K Internal pull-up on PBRST' Open Drain Outputs DS1832S R1 5.11K WD_STB 2 PBRST COMP1 UC_RSTN 2...
  • Page 106 Technical Discussion This Page Intentionally Blank...

  • Page 107: Figure 35: User Interface Pcb Schematic Diagram (Sheet 2 Of 3)

    Technical Discussion AT91R40008 0.1uF 1Meg x 16 FLASH PROGRAM MEMORY 0.1uF 0.1uF 0.1uF 0.1uF 0.1uF VDDIO A0/NLB VDDIO VDDIO AM29LV400/SO48 VDDIO VDDIO VDDIO VDDCORE VDDCORE 0.1uF 0.1uF 0.1uF VDDCORE RTC_SDAT P0/TCLK0 RTC_SCLK P1/TIOA0 WD_STB P2/TIOB0 DQ10 30.1K BK_LIGHT P3/TCLK1 DQ11 Mfg_Test BZ_FRQ P4/TIOA1...
  • Page 108 Technical Discussion This Page Intentionally Blank...

  • Page 109: Figure 36: User Interface Pcb Schematic Diagram (Sheet 3 Of 3)

    Technical Discussion LCD1_COM1 NJU6432BF LCD1_COM2 MUX01_35 IRLML6401 SEG1 MUX02_36 VLCD SEG2 MUX03_37 SEG3 47.5 ohm MUX04_38 V D D SEG4 MUX05_39 1/8w SEG5 MUX06_40 47uF SEG6 MUX07_41 4.7uF SEG7 0.1uF MUX08_42 0.1uF SEG8 MUX09_43 SEG9 MUX10_44 294K V S S SEG10 MUX11_45 SEG11...
  • Page 110 Technical Discussion This Page Intentionally Blank...
  • Page 111 I n d e x external agents accessories on internet accuracy and motion tolerance flammable anesthetics alarm management,satseconds fractional saturation alarm volume front case assembly replacement arterial dyes front panel buttons audible indicator front panel buttons and symbols function menu functional checks functional saturation battery compartment door replacement...
  • Page 112 Index oximetry overview SpO2 low limit SRC-MAX SRC-MAX tester stopwatch packing for shipment storage packing in a different carton altitude 68 parts list relative humidity 68 performance verification temperature 68 periodic safety checks strangulation physiological conditions surface-cleaning POST pass tone power-on self-test print data pulse beep volume...
  • Page 114 Tyco Healthcare Group LP Nellcor Puritan Bennett Division 4280 Hacienda Drive Pleasanton, CA 94588 U.S.A. Telephone 1.800.635.5267 Authorized Representative Tyco Healthcare UK LTD 154 Fareham Road Gosport PO13 0AS, U.K. © 2004 Nellcor Puritan Bennett Inc. All rights reserved. Rx ONLY 067008B-1004...

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