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Novametrix Medical Systems 515B Service Manual

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Model 515B
and
Model 515C
Service Manual
Pulse Oximeter
This manual covers Model 515B (Cat. No. 6500-00) and Model 515C (Cat. No. 6550-00)
November 15, 1995
Catalog No. 6500-90-01/6550-90-01
Novametrix Medical Systems Inc. Wallingford, Connecticut, U.S.A. 06492.
Copyright ©1995. All rights reserved. No part of this manual may be reproduced
without the written permission of Novametrix Medical Systems Inc. Printed in U.S.A.

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Summary of Contents for Novametrix Medical Systems 515B

  • Page 1 Model 515B Model 515C Service Manual Pulse Oximeter This manual covers Model 515B (Cat. No. 6500-00) and Model 515C (Cat. No. 6550-00) November 15, 1995 Catalog No. 6500-90-01/6550-90-01 Novametrix Medical Systems Inc. Wallingford, Connecticut, U.S.A. 06492. Copyright ©1995. All rights reserved. No part of this manual may be reproduced...
  • Page 3 Revision History 19-May-95 Release at revision 00. 15-Nov-95 Updated, revision 01. Rev. 01 Model 515B/C Service Manual...
  • Page 4 [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...
  • Page 5 Copyright © 1995, Novametrix Medical Systems Inc. This document contains information which is proprietary and the property of Novametrix Medical Systems Inc., and may not be reproduced, stored in a retrieval system, translated, transcribed, or transmitted, in any form, or by any means, without prior explicit written permission from Novametrix Medical Systems Inc.
  • Page 6 Service Policy Novametrix Medical Systems Inc. will provide Warranty Service Support to its customers within 48 hours of receiving a telephone request for technical support. This 48 hour period begins once a service request is placed through the Factory Technical Support Department in Wallingford, Connecticut.

  • Page 7: Table Of Contents

    5.2.11 Microprocessor and Memory ..................18 5.2.12 Decoding ........................18 5.2.13 Microprocessor Supervisor ..................19 5.2.14 System Output Ports ....................19 5.2.15 Displays ........................20 5.2.16 Audio Drive Circuitry ....................20 5.2.17 Keypanel and Configuration Header .................21 5.2.18 Graphics Display .......................21 Rev. 01 Model 515B/C Service Manual...
  • Page 8 10.2 General Specifications ................43 10.2.1 Alerts ......................... 43 10.2.2 Display ........................44 10.2.3 Physical ........................44 10.2.4 Electrical ........................44 11 Accesories ....................45 12 Parts Lists ....................49 12.1 Model 515C ..................... 49 viii Model 515B/C Service Manual Rev. 01...
  • Page 9 12.2 Model 515B ....................53 12.3 Common Assemblies to both Models 515B & 515C ........59 13 Schematics and Assembly Drawings ............63 Rev. 01 Model 515B/C Service Manual...
  • Page 10 Model 515B/C Service Manual Rev. 01...

  • Page 11: Description

    Description This manual is written for personnel who service and/or maintain the Novametrix Model 515B or 515C Pulse Oximeter. The Model 515B/C provides reliable continuous measurement, display, and alerts for oxygen saturation (SpO ) and pulse rate. The monitor can be powered from its rechargeable internal battery or from the AC Mains.
  • Page 12 Description Trademark Acknowledgments [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

  • Page 13: Patient Safety

    • Keep the Model 515B/C and its accessories clean. • Do not operate the Model 515B/C when it is wet due to spills or condensation. • Do not operate the Model 515B/C if it appears to have been dropped or damaged.

  • Page 14: Warnings

    Warning Indicates a potentially harmful condition that can lead to personal injury. • Explosion Hazard: Do NOT use the Model 515B/C in the presence of flammable anesthetics. Use of this instrument in such an environment may present an explosion hazard.

  • Page 15: Cautions

    Indicates a condition that may lead to equipment damage or malfunction. • Do not operate the Model 515B/C when it is wet due to spills or condensation. • Do not operate the Model 515B/C if it appears to have been dropped or damaged.
  • Page 16 Patient Safety Cautions [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

  • Page 17: Front And Rear Panel Illustrations

    SpO and Pulse keys. Press and hold to control graphics dis- Two minute silence indictor - Illuminates play contrast on Models 515C (Model 515B yellow when the audio has been muted for does not have graphics display option). two minutes.
  • Page 18 “O” switches AC mains power off. Power cord entry - Plug power cord into this receptacle. Use only hospital grade three wire plugs for connection via supplied power cord. Model 515B/C Service Manual Rev. 01...

  • Page 19: Summary Of Operation

    Summary of Operation This section gives a brief description of the operation of the Model 515B/C monitor. For more detailed information refer to the Model 515B/C User’s Manual (Cat. No. 6500-23/6550-23). Turning the monitor ON/OFF key controls powering the monitor on and off. To charge the battery from AC mains ensure that the power cord is connected and plugged into a hospital grade three prong outlet.

  • Page 20: Adjusting Volume Levels

    2. There is a ten second time-out counter that starts each time the SpO or pulse key is pressed. When the counter times-out the monitor will return to its normal operating mode. Model 515B/C Service Manual Rev. 01...

  • Page 21: Electronic Theory Of Operation

    AC Mains and Battery Operation Overview 5.1.1 The Model 515B/C is powered from its internal 12 volt battery that is charged when the monitor is connected to the AC line. The green (sine wave shaped) front panel indicator illuminates when the line cord is connected and the rear panel power switch is in the “|”...

  • Page 22: Main Board

    The 2722 or 2724 version contains the graphics display for model 515C, otherwise the circuitry is identical. Units with the newer 2723 (for Model 515B) or 2724 (Model 515C) board can be identified with an “X” in the serial number suffix.

  • Page 23: Power Supplies And Voltage References

    The switch IC28c pins 9-11, controlled from SIGND* (Signal Ground), will be open 1. The Model 515B/C uses SuperBright™ sensors (part number 87xx series). If a non-SuperBright™ (Novametrix part num- ber 86xx series) sensor is connected, IC4b pin 7 will go negative.

  • Page 24: 20-Bit Analog-To-Digital Convertor Self Calibration

    Data from the Red and Infrared channels is sampled by the 20-bit measurement ADCs, IC23 and IC24 respectively. The analog input at pin 9 is converted to a digital representation with 20- bit resolution based on the input magnitude. Model 515B/C Service Manual Rev. 01...

  • Page 25: Sensor Status Decoding And Conversion

    The Q14 output of IC6 is used as an interrupt that is generated every 5 milliseconds (INT5MS). The data sampling controller IC13 is a Programmable Electrically Erasable Logic device (PEEL). The PEEL uses the outputs from IC6 and generates the front end timing signals. These Rev. 01 Model 515B/C Service Manual...

  • Page 26: Sensor Status Parameters

    Infrared LED. If the channel at IC25 pin 5 is sampled the monitor can determine if the LED is open circuit (zero volts at IC25 pin 5) or operational (approximately 2.5 volts at IC25 pin 5). Model 515B/C Service Manual Rev. 01...

  • Page 27: Serial I/O Controller

    After receiving the correct number of bits for the ADC being read, the CPU changes the AA1 and AA0 decode lines and exerts the Next line (NEXT*) at IC12 pin 12 low. This restarts the serial data shifting out of the newly selected ADC. Rev. 01 Model 515B/C Service Manual...

  • Page 28: Microprocessor And Memory

    Microprocessor and Memory 5.2.11 The Model 515B/C is controlled by IC1, an 8 bit microprocessor running at 6.14 MHz (see page 1 on schematic). Crystal Y1 controls the operating frequency, system address lines are labelled as A0-A17, system data lines are labelled D0-D7.

  • Page 29: Microprocessor Supervisor

    Biases Q9 on, which in turn illuminates the hand LED, D8. Biases Q1 on, which in turn illuminates the four alert bar LEDS, D28-D31. RED_BAT Illuminates the red battery icon LED, D15. GREEN_BAT Illuminates the green battery icon LED, D15. Rev. 01 Model 515B/C Service Manual...

  • Page 30: Displays

    Audio Drive Circuitry 5.2.16 The audio in the Model 515B/C is both frequency and volume adjusted, see page 4 on schematic. The speaker LS1 is driven by audio amplifier IC16, volume is controlled by a digital potentiometer IC33, located in the feedback loop. The digital potentiometer is controlled by the AUD_INC* line and address line A0.

  • Page 31: Keypanel And Configuration Header

    Q16 is biased off the backlight is off (R32 is not installed int he 2723/2724 boards). 2. The TSW1 configuration header will disable the audible alert muting if set, the remaining lines are for internal Novametrix use. Rev. 01 Model 515B/C Service Manual...
  • Page 32 Electronic Theory of Operation Main Board [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

  • Page 33: Maintenance

    Maintenance This section contains maintenance information for the Model 515B/C monitor and accessories. Cleaning and Sterilization Follow the cleaning and sterilization instructions listed below to clean and/or sterilize the monitor and its accessories. Monitor 6.1.1 • Turn the monitor off and unplug the line cord from the AC mains before cleaning.

  • Page 34: Battery Maintenance

    CAUTION: Replace fuses with same type and rating. Verify proper fuse value for mains voltage setting (see table below). Mains Voltage Fuses (Slo Blo) Part Number 100-120 VAC 0.5 A 250V 515023 200-240 VAC 250mA 250V 515033 Model 515B/C Service Manual Rev. 01...

  • Page 35: Assemblies With The Earlier Power Entry Modules

    3. Using a flat blade screwdriver, pry the fuse access door open to expose the fuse housing. Note the orientation of the fuse housing (this determines the mains operating voltage). POWER ENTRY MODULE FUSE HOUSING FUSE ACCESS DOOR Rev. 01 Model 515B/C Service Manual...

  • Page 36: Changing Ac Mains Voltage

    1. Turn off the monitor. Set the rear panel AC mains power switch to “0” and disconnect the line cord from the monitor. 2. Place a screwdriver into the fuse access slot and pry open the fuse access door. Model 515B/C Service Manual Rev. 01...

  • Page 37: Assemblies With The Newer Power Entry Module

    Assemblies with the newer Power Entry Module 6.4.2 1. Check that the monitor is OFF. 2. Set the rear panel power entry module switch to OFF (“O”). Remove the line cord from the power entry module (if connected). Rev. 01 Model 515B/C Service Manual...
  • Page 38 5. Position the housing into the power entry module so that the desired voltage is furthest away from the switch (see below). SET FOR 100-120V OPERATION SET FOR 200-240V OPERATION 6. Close the fuse access door and verify the proper mains operating voltage is displayed. MAINS OPERATING VOLTAGE Model 515B/C Service Manual Rev. 01...

  • Page 39: Assembly Exchanges

    1. Follow the steps listed in “Assembly Exchanges” on page 29 to remove the main board and keypanel assemblies. Be sure to disconnect the power cable from J404 on the main board to ensure that power is removed from the board. Rev. 01 Model 515B/C Service Manual...
  • Page 40 1 of the socket. Check that all the pins are inserted properly into the socket. 5. Reassemble the monitor. NOTE: Hold the main board and keypanel assemblies together when inserting into the bottom half of the case. Model 515B/C Service Manual Rev. 01...

  • Page 41: Troubleshooting

    This message will disappear once the problem is corrected. Pulse out of range. Pulse must be within 30 -250 beats per minute inclu- sive. This message will disappear once the problem is corrected. Rev. 01 Model 515B/C Service Manual...
  • Page 42 Bad Signal. Monitor not receiving valid signals from sensor. May be caused by excessive motion, cardiac arrhythmia or other situations lead- ing to poor signal. Check patient status, reposition sensor. This message will disappear once the problem is corrected. Model 515B/C Service Manual Rev. 01...

  • Page 43: Functional Test

    If using the Y-Sensor it is recommended that one of the Y-Strip tapes be used also. This will facilitate easy application of the sensor for testing purposes. OxySnap extension cable Cat No. 8853 Finger Sensor Cat No. 8744 Y-Sensor Cat No. 8793 Finger Sensor Cat No. 8776 Rev. 01 Model 515B/C Service Manual...

  • Page 44: Functional Test

    “- - -”. If using the Y-Sensor, hold the heads of the sensor so that they face each other (the red light shines at the detector). SuperBright™ 8700 series sensor connector Model 515B/C Service Manual Rev. 01...
  • Page 45 SpO window. The upper limit will be displayed for three seconds while the icon is illuminated. Then the lower limit will be displayed for three seconds while the icon illuminates. Rev. 01 Model 515B/C Service Manual...
  • Page 46 Set the rear panel power switch to “|” (ON). Let the battery charge for 12 hours before use. 16. Press to power the monitor down. 17. This completes the Model 515B/C and sensor functional test. Model 515B/C Service Manual Rev. 01...

  • Page 47: Electronic Tests

    Electronic Tests The electronic tests verify the operation of the electronic circuits within the Model 515B/C. These tests DO NOT need to be performed on a regular (preventative maintenance) basis. Perform these test only if the monitor fails to operate as expected and/or fails the “Functional Test”...

  • Page 48: Main Board

    2. Carefully lift the main board/keypanel assembly from the bottom cover to separate the keypanel from the main board. This is to expose test points on the main board for voltage measurements. Model 515B/C Service Manual Rev. 01...
  • Page 49 SATURATION settings on the TB500B Sensor Simulator. Note that the pulse rate should remain stable at 50-61 beats per minute. Monitor’s SpO display SAT. SIGNAL SETTING ATTEN. TB500A TB500B 98-100 98-100 90-94 90-94 82-86 80-84 75-79 70-74 Rev. 01 Model 515B/C Service Manual...

  • Page 50: Accuracy Test

    Accuracy Test The accuracy tests verifies the performance accuracy of the Model 515B/C Pulse Oximeter. This test uses the Model TB500B Sensor Simulator (available from Novametrix Service Dept.). This is the same device used by the factory technicians to calibrate the monitor prior to shipping. The TB500B is an updated version of the TB500A Test Box.
  • Page 51 80-84 75-79 70-74 67-71 60-64 74-80 68-76 80-88 78-86 88-96 88-96 98-100 98-100 12. Turn off then disconnect the TB500B. Turn the Model 515B/C off. This completes the accuracy test for the Model 515B/C. Rev. 01 Model 515B/C Service Manual...
  • Page 52 Electronic Tests Accuracy Test [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

  • Page 53: Specifications

    Specifications Below are specifications for the Novametrix Model 515B/C Pulse Oximeter. These specifications are listed for informational purposes only, and are subject to change without notice. 10.1 Pulse Oximeter Principle of Operation 10.1.1 • Red/Infrared absorbtion (Oxygen Saturation) 10.1.2 • Range: 0-100% •...

  • Page 54: Display

    U.S. specification: 0.5 A, 250 V, Slo-Blo European specification: T 250 mA/250 V (x2) • Battery: Sealed lead acid gel cell, 8 hr. life, 12 hr. recharge. Indicators for battery charging, battery operation, low battery, and extremely low battery. Model 515B/C Service Manual Rev. 01...

  • Page 55: Accesories

    Accesories Model 515B/C PULSE OXIMETER Catalog No.Description 6500-00 Model 515B Pulse Oximeter 6550-00 Model 515C Pulse Oximeter with graphic display SpO2 SENSORS and CABLES 8793 OxySnap Y-Sensor (use with OxySnap extension cable) 8744 OxySnap Finger Sensor (use with OxySnap extension cable) 8853 OxySnap Extension Cable, 8ft.
  • Page 56 140032 Pivot Block Mount 140033 Transport Mount (without swivel head) 140034 Transport Mount (with swivel head) 140035 Countertop Mount (11 inch base) 140036 Countertop Mount (5 inch base) 140037 Portable Instrument Housing 140038 Rollstand Model 515B/C Service Manual Rev. 01...
  • Page 57 Accesories Catalog No.Description MISCELLANEOUS 7106-10 Transport Pouch (for monitor) 7104-10 Side Accessory Pouch 6318-00 Kickstand Kit for Model 515B or 515C monitors 600026 Power cord (included with monitor) REFERENCE CARDS 6342-32 English 6436-32 Spanish 6435-32 French 6365-32 German 280022 13” chain, used to attach reference card to the monitor...
  • Page 58 Accesories [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

  • Page 59: Parts Lists

    DESCRIPTION 600026 LINE CORD, 7 1/2 FT, Hospital Grade Plug 400024 BATTERY, 12V, 1.9Amp Hour, Lead Acid 6380-27 MEMBRANE KEYPANEL, Model 515C 6375-27 MEMBRANE KEYPANEL, MOdel 515B 6407-01 TOP COVER Assy. 6408-01 BOTTOM COVER Assy 9621-16 LENS, Alert 515023 FUSE, 1/2A SB (for 100-120 VAC)
  • Page 60 REAR PANEL ASSY, MODEL 515B & 515C 0006 6380-27 MEMBRANE KEYPANEL, MODEL 515C 0007 6381-01 CABLE ASSY, SPO2 INPUT, MODEL 515B & 515C 0008 6382-01 POWER HARNESS ASSY, MODEL 515B & 515C 0009 6407-01 TOP COVER ASSY, MODEL 515B & 515C...
  • Page 61 RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT 474166 RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT 474172 RESISTOR, 10 OHM, 1/8W, 1%, SURFACE MOUNT 474175 RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT 474178 RESISTOR, 825 OHM, 1/8W, 1%, SURFACE MOUNT Rev. 01 Model 515B/C Service Manual...
  • Page 62 487098 IC, MAX705CSA, UPROCESSOR SPRVISORY CKT, S MN 487114 IC, MC34119D, AUDIO AMPLIFIER, L PWR, 8 PIN, 515074 FUSE, PIGTAIL, 1/16A, 125V, V FAST-ACTING, 1. 515083 FUSE W FUSEHOLDER, 1A, 125V, V FAST-ACTING, S Model 515B/C Service Manual Rev. 01...
  • Page 63 PART NO DESCRIPTION 515085 FUSE W FUSEHOLDER, 2A, 125V, SLO-BLO, SUBMIN, 2721-02 FAB, MAIN BOARD, MODEL 515B AND 515C 5965-07 PROGRAM, PEEL ASSY, CSIO CONTROLLER, MODEL 51 5966-07 PROGRAM, PEEL ASSY, TIMING SEQUENCER, MODEL 5 2724-01 01 Main Board Assy...
  • Page 64 REAR PANEL ASSY, MODEL 515B & 515C 0006 6375-27 MEMBRANE KEYPANEL, MODEL 515B 0007 6381-01 CABLE ASSY, SPO2 INPUT, MODEL 515B & 515C 0008 6382-01 POWER HARNESS ASSY, MODEL 515B & 515C 0009 6407-01 TOP COVER ASSY, MODEL 515B & 515C...
  • Page 65 474185 RESISTOR, 150 OHM, 1/8W, 1%, SURFACE MOUNT 474186 RESISTOR, 15K OHM, 1/8W, 1%, SURFACE MOUNT 474209 RESISTOR, 2.67K OHM, 1/8W, 1%, 1206 STYLE, S 474210 RESISTOR, 56.2K OHM, 1/8W, 1%, 1206 STYLE, S Rev. 01 Model 515B/C Service Manual...
  • Page 66 515083 FUSE WITH FUSEHOLDER, 1A, 125V, SURFACE MOUNT 515085 FUSE WITH FUSEHOLDER, 2A, 125V, SLO-BLO, SURF 2721-02 FAB, MAIN BOARD, 5965-07 PROGRAM, PEEL ASSY, CSIO CONTROLLER, 51 5966-07 PROGRAM, PEEL ASSY, TIMING SEQUENCER, 5 Model 515B/C Service Manual Rev. 01...
  • Page 67 2723-03 SCHEMATIC, MAIN BOARD, MODEL 515B 0002 2723-04 TEST PROCEDURE, MAIN BOARD, MODEL 515B 0003 2723-17 MAIN BOARD SUBASSY, MODEL 515B & 515C 0004 6410-07 PROGRAM, EPROM ASSY, SPO2, 515B & 515C 2723-17 01 Main Board Subassy PART NO DESCRIPTION 130014 SPEAKER, 550 HZ,.5W, 2 IN.
  • Page 68 IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS 486319 IC, MC14020BD, 14-BIT BINARY COUNTER, SURF MO 486320 IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF 486321 IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF 486323 IC, SN74HC573DW, OCTAL D-TYPE LATCH W 3-ST OU Model 515B/C Service Manual Rev. 01...
  • Page 69 Parts Lists Common Assemblies to both Models 515B & 515C PART NO DESCRIPTION 486324 IC, DG444DY, QUAD SPST CMOS ANALOG SW, SURF M 486329 IC, SN74HC32D, QUAD 2-IN. POS OR GATE, SURF M 486332 IC, AD7703BR, 20-BIT A TO D CONVERTER, SURFAC...
  • Page 70 LABEL, WARNING, POLE MOUNT, MODEL 515 0003 5766-16 BOTTOM COVER, WHITE, 520A, 1265 & 7100 0004 6473-10 FOAM TAPE, 1 IN. X 1 IN., MODEL 515B & 515C 0009 161064 TAPE, 3/4 X 60 YDS, CLEAR, DOUBLE-SIDED ADHES 0010 240056 FOOT, RUBBER,.81 SQ X.3 HI W TAPER, WHITE,...
  • Page 71 Parts Lists Common Assemblies to both Models 515B & 515C LINE PART NO DESCRIPTION 0021 472030 RESISTOR, 10K OHM, 1/4W, 1%, CARBON 0022 472049 RESISTOR, 49.9K OHM, 1/4W, 1%, CARBON 0023 472058 RESISTOR, 100K OHM, 1/4W, 1%, CARBON 0024 472065...
  • Page 72 REAR PANEL SUBASSY, MODEL 515B & 515C 0005 6497-01 GROUND WIRE ASSY, POWER ENTRY MODULE, 515B & 0006 6498-01 POWER CABLE ASSY, REAR PANEL, MODEL 515B & 51 0012 210149 POWER ENTRY MODULE, SEL FUSE, ON/OFF SW & RFI 0013 216059...
  • Page 73 Schematics and Assembly Drawings 6500-00 Final Assy, Model 515B 6500-09 Overall Wiring Diagram, Model 515B 6500-01 Assy, Model 515B 6550-00 Final Assy, Model 515C 6550-09 Overall Wiring Diagram, Model 515C 6550-01 Assy, Model 515C 6376-01 Rear Panel Assy 2532-01 Power Supply Assy.
  • Page 74 Schematics and Assembly Drawings [This page intentionally blank.] Model 515B/C Service Manual Rev. 01...

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