Novametrix 515B, 515C User manual

Download

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.

without the written permission of Novametrix Medical Systems Inc. Printed in U.S.A.

Revision History

19-May-95 Release at revision 00. 15-Nov-95 Updated, revision 01.

Rev. 01 Model 515B/C Service Manual

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Model 515B/C Service Manual Rev. 01

Guarantee

Equipment manufactured or distributed by Novametrix Medical Systems Inc., is fully guaranteed, covering materials and workmanship, for a period of one year from the date of shipment, except for certain disposable products and products with stated guaran tees other th an one year. Novametrix reserves the right to perform guarantee service(s) at its fac tory, at an authorized repair station, or at the customer’s installation.

Novametrix’ obligations under this guarantee are limited to repairs, or at Novametrix’ option, replacement of any defective parts of our equipment, except fus es, batteries, and cal ibration gasses, without charge, if said defects occur during normal service.

Claims for damages during shipment must be filed promptly with the transportation company. All correspondence concerning the equipment must specify both the model name and number, and the serial number as it appears on the equipment.

Improper use, mishandling, tampering with, or operation of the equipment without following specific operating instructions will v oid this g uarantee and r elease Nov ametrix from any further guarantee obligations.

Service Department

For factory repair service, call toll free

1-800-243-3444

In Connecticut, call Collect (203) 265-7701

Telex 956-054

Facsimile (203) 284-0753

Caution: Federal (U.S.A.) law restricts this device to sale, distrib ution, or u se by or on the order of a licensed medical practitioner.

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 fro m No vametrix Medical Systems Inc.

Rev. 01 Model 515B/C Service Manual

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 W allingford, Connecticu t. Nov ametrix provides factory direct technical support to its customers through a technical support group located in Wallingford, Connecticut and company service representatives located throughout the United States. All Technical Support for Novametrix products is provided “Factory Direct”.

Novametrix p rov ides 24 hour a day techn ical supp ort accessibility via telephone numbers (800 ) 243-3444 or (203) 265-7 701. After ho urs technical supp ort requests (before 8:00 AM and after 5:00 PM Eastern Time) will be responded to promptly by the Technical Support On-Call staff. It is suggested that any person calling in for technical support have the inoperative equipment available for preliminary troubleshoo ting as well as product identif ication. No v ametrix reserv es the right to repair or replace any product found to be defective during the warranty period. Repair may be provided in the form of replacement exchange parts or accessories, on-site technical repair assistance or complete system exchanges. Repairs provided due to product abuse or misuse will be considered “non-warranty” and invoiced at the prevailing service rate. Any replaced defective material is expected to be returned to Novametrix within 10 days of being provided in order to avoid additional charges. Exchanged material should be returned promptly and directly to Nov ametrix using the retur n paperwor k and shipp ing label(s) pro vided. Transferring return materials to local sales or dealer represent atives does not absolve return responsibility.

Novametrix manufactures equipment that is generally “user se rviceable” and can us ually be repaired with the replacement of a plug-in electro-mechan ical assembly by the clinical end user. When repair parts are provided, the recipient can call into Novametrix for on-line replacement assistance and repair assurance. In the event a replacement part requires increased technica l capability, Technical Support may request Biomedical assistance, provide on-site technical support or complete replacement equ ipment. If the custom er requires the retur n of their original product, the exchange material will be considered “loaner material” and exchanged again after the customer equipment is repaired.

Novametrix pro motes customer participation in warr anty repairs should the y become necessary . This program allows for customer training and a smooth transition into self-maintenance after warranty, which can provide substantial cost savings on repairs throughout the product’s life.

The Novametrix Techn ical Suppor t Department can pro vide technical prod uct support at a le vel appropriate to most customers protocol and budget requirements. Please contact the Technical Support Group at Novametrix for additional information.

Additional Novametrix Technical Support Programs

• Focus Series Technical Training Seminars

• Test Equipment and Test Kits

• Service Contract / Part Insurance Plans

• On-Site Technical Support

• 24 hr. telephone support

• “Demand Services” Flat rate parts-exchange, Flat rate return for repair Time and Material, Full warranty, discounted replacement sensors

Model 515B/C Service Manual Rev. 01

Contents

1 Description .................................................................................................... 1

1.1 Trademark Acknowledgments ...................................................................1

2 Patient Safety ................................................................................................3

2.1 Indications and Usage ..................................... .... ........................ .... ..... .....3

2.2 Warnings ................................................................................................... 4

2.3 Cautions ....................................................................................................5

3 Front and Rear Panel Illustrations .................... .... ..... ..... ....................... .....7

4 Summary of Operation .................................................................................9

4.1 Turning the monitor ON/OFF ................................................................ .....9

4.2 Displays .....................................................................................................9

4.3 Adjusting Alert Limits .................................................................................9

4.4 Adjusting Volume Levels .........................................................................10

4.5 Muting Alerts ............................................................................................10

4.6 Contrast ...................................................................................................10

5 Electronic Theory of Operation .................................................................11

5.1 2532/2725 Power Supply Board ..............................................................11

5.1.1 AC Mains and Battery Operation Overview ..............................................................11

5.1.2 AC Mains Operation ..................................................................................................11

5.2 Main Board ..............................................................................................12

5.2.1 Power On/Off Control Circuitry ..................................................................................12

5.2.2 Power Supplies and Voltage References ..................................................................13

5.2.3 Sensor LED Drive Circuits ........................................................................................13

5.2.4 Sensor Photodiode Return Path ...............................................................................13

5.2.5 20-Bit Analog-to-Digital Convertor Self Calibration ...................................................14

5.2.6 20-B it Ana lo g-to-Dig ita l Conversion ............................... ....... ....................................14

5.2.7 Sensor Status Decoding and Conversion .................................................................15

5.2.8 Front End Timing Signals ..........................................................................................15

5.2.9 Sensor Status Parameters ........................................................................................16

5.2.10 Serial I/O Controller ...................................................................................................17

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 ............................. ................... .......................... .................... .......................2 0

5.2.16 Audio Drive Circuitry .................................................................................................20

5.2.17 Keypanel and Configuration Header .........................................................................21

5.2.18 Graphics Display .......................................................................................................21

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6 Maintenance ................................................................................................ 23

6.1 Cleaning and Sterilization ........................................................................23

6.1.1 Mon itor ..................................................... .................................................................23

6.1.2 SpO

6.1.3 SpO

6.1.4 Y-S trip Ta pes and Foam Wraps ................................. ....... ...... ....... ...... ....................23

6.1.5 Ea r Cli ps ..................................... ....... ...... ...... ....... ...... ....................................... ....... 23

Finger Sensor ..................................................................................................23

Y-Sensor ......................................................................................................... 23

6.2 Battery Maintenance ................................................................................24

6.3 Replacing AC Mains Fuses .....................................................................24

6.3.1 Assemblies with the earlier Power Entry Modules .................................................... 25

6.3.2 Assemblies with the newer Power Entry Module ...................................................... 25

6.4 Changing AC Mains Voltage ..................... .... ........................ .... ..... ..... ....26

6.4.1 Assemblies with the earlier Power Entry Module ......................................................26

6.4.2 Assemblies with the newer Power Entry Module ...................................................... 27

6.5 Assembly Exchanges ..............................................................................29

6.5.1 Internal Assemblies ...................................................................................................29

6.5.2 Main Board/Keypanel Assembly ...............................................................................29

6.5.3 Power supply assembly ............................................................................................ 29

6.5.4 Replacing the internal battery ...................................................................................29

6.6 Changing System Software ......................................... ............................29

7 Troubleshooting ..........................................................................................31

8 Functional Test ...........................................................................................33

8.1 Equipment require d ................ ..... .... ..... ....................... ..... ..... .... ..............33

8.2 Functional Test ........................................................................................34

9 Electronic Tests ..........................................................................................37

9.1 Assembly Tests .......................................................................................37

9.1.1 Equipment Required .................................................................................................37

9.1.2 Power Supply ............................................................................................................37

9.1.3 Main Board ................................................................................................................38

9.2 Accuracy Test ..........................................................................................40

9.2.1 Equipment Required .................................................................................................40

9.2.2 Test ...... ................................................................. ....................................................40

10 Specifications ..............................................................................................43

10.1 Pulse Oximeter ........................................................................................43

10.1.1 Principle of Operation ...............................................................................................43

10.1.2 SpO

10.1.3 Pulse Rate ................................................................................................................ 43

10.1.4 Se nsors .............................................. ............................................. ..........................43

10.1.5 Pl eth ysmo gram (Mode l 515C onl y) .... ...... ...... ....................................... ....... ...... ....... 43

(Oxygen Saturation) ....................................................... ................................. 43

10.2 General Specifications .............................................................................43

10.2.1 Al erts ..................................... ................................ ....................................... .............43

10.2.2 Display ...................................................................................................................... 44

10.2.3 Ph ysical ............. ............. ............. ............. ...... ............. ............. ............. ....... ............. 44

10.2.4 Electrical ................................................................................................................... 44

11 Accesories ................................................................................................... 45

12 Parts Lists ....................................................................................................49

12.1 Model 515C .............................................................................................49

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Model 515B/C Service Manual Rev. 01

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

Model 515B/C Service Manual Rev. 01

Description

This manual is written for personnel who service and/or maintain the No vametrix Model 515B or 515C Pulse Oximeter. The Model 515B/C provides reliable continuous measurement, display, and alerts for oxygen saturation (SpO from its rechargeable internal battery or from the AC Mains.

The Model 515B/C measures oxygen saturation using sensors that contain red and infrared (66 0 and 940 nanometer) light sources, called LEDs. The light e nergy from each LED is beamed through a sample cell—a pulsating vascular bed, the patient’s finger or toe for example. The remaining light energy not absorbed by the sample cell reaches a light receptor in the sensor, called a photodiode. Oxygen saturated blood absorbs different amounts of light at each wavelength as compared to unsaturated blood. Therefore, the amount of light absorbed by the blood in each pulse can be used to calculate oxygen saturation.

The Model 515B/C is calibrated to display “functional” saturation. This differs from the “fractional” saturation value displayed by most co-oximeters. Functional saturation is defined as:

Functional Saturation =

= Percentage of hemoglobin saturated with oxygen

HbO

COHb = Percentage of carboxyhemoglobin METHb = Percentage of methemoglobin

) and pulse rate. The monitor can be powered

HbO

100 - (COHb + METHb)

This can be considered to re present the amount of oxyhem oglobin as a percentage of the hemoglobin that can be oxygenated. Dysfunctional hemoglobins (COHb and METHb) are not included in the measurement of functional saturation.

Pulse Rate is calculated by measuring the time interval between peaks of the infrared light waveform. The inverse of this measurement is displayed as pulse rate.

The oxygen saturation and pulse rate values are upda ted once each second. Presence of a pulse is indicated visibly by a b ar graph display, a plethysmogram graphic disp lay (Models 515C only), and audibly by a “beep.”

The Model 515B/C must be used in conjunction with Su perBright™ Sensors. These sensors have an 8700 series part number (e.g., 8776 or 8791).

1.1

Rev. 01 Model 515B/C Service Manual

Trademark Acknowledgments

SuperBright, Y-STRIP and Y-SENSOR are trademarks of Novametrix Medical Systems Inc.

Description

Trademark Acknowledgments

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Model 515B/C Service Manual Rev. 01

Patient Safety

Pulse oximetry is a non-invasive method of monitoring the oxygen saturation of arterial blood. Pulse oximeters display oxygen saturation of functional hemo globin an d ther efor e the accuracy may be interfered with by carboxyhemoglobin or other dyshemoglobins present in significant concentrations. Oxygen saturation monitoring is intended to be used in a variety of clinical situations, including, but not limited to respiratory therapy, anesthesia, intensive care, and emergency.

The Model 515B/C Pulse Oximeter has electrically isolated inputs. Patient leakage current flowing from the instrument to ground is limited to less than 10 µA at 120 V, 60 Hz. Patient isolation is greater than 10 MΩ, 2500 V rms at 60 Hz. For maximum patient and operator safety , the following procedures are recommended;

• Failure of Operation: If the monitor fails to respond as described, do not use until the situation has been corrected by qualified personnel.

• 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

• Connect the line cord only to a grounded hospital grade outlet. Th e Model 515B/C should be connected to the same electrical circuit as other equipment in use on the patient. Outlets on the same circuit can be identified by the hospital’s engineering department.

if it appears to have been dropped or damaged.

2.1

Indications and Usage

The Model 515B/C is intended to be used for monitoring functional oxygen satur ation and pulse rate in circumstances where it is desirable to monitor patient oxygenation. The monitor is designed to monitor all patients including adult, pediatric, and neonatal. The Model 515B/C is not intended for any other purpose.

NOTE: Components of this product and its associated accessories which may have patient contact are free of latex.

Rev. 01 Model 515B/C Service Manual

Patient Safety

Warnings

2.2

Warnings

• Explosion Hazard: Do NOT use the Model 515B/C in the presence of flammab le

anesthetics. Use of this instrument in such an environment may present an explosion hazard.

• Electrical Shock Hazard: Always turn the ox imeter off, and remov e the AC power cord

before cleaning it. Do NOT use a damaged sensor or one with exp osed electrical contacts. Refer servicing to qualified service personnel.

• Patient Safety: Extreme care should be exercised with neonates to assure continued

circulation distal to the sensor site after application.

• Failure of Operation: If the oximeter fails to respond as described, do not use it until

the situation has been corrected by qualified personnel.

• Data Validity: The Pulse Oximeter should NOT be used as a substitute for an ECG

monitor. The oximeter’s Pulse Rate display reflects the pulsatile flow found at the patient extremity connected to the sensor. This rate can be affected by many factors and may occasionally be “frozen.”

• Care should be exercised to assure continued peripheral perfusion distal to the SpO

sensor site after application.

• Data Validity: Do NOT attach a sensor distal to a blood pressure cuff. Valid data

CANNOT be processed when the cuff is inflated. Attach the sensor to the limb opposite to the site used for the blood pressure cuff.

• Data Validity: Inaccurate SpO

of the following:

• Do Not apply Y-Sensor tapes or wraps so tightly that circulation is restricted. Inspect site

often for adequate circulation - at least once every four hours. When applying sensors take note of patient’s physiological condition. For example, burn patients may exhibit more sensitivity to heat and pressure and therefore additional consideration such as more frequent site checks may be appropriate.

Warning

Indicates a potentially harmful condition

that can lead to personal injury.

and/or Pulse Rate measurements can be caused by any

• Incorrect application or use of a sensor

• Significant levels of dysfunctional hemoglobins such as carboxyhemoglobin or methemoglobin

• Significant levels of indocyanine green, methylene blue, or other intravascular dyes

• Exposure to excessive illumination such as surgical lamps - especially ones with a xenon light source, or direct sunlight

• Excessive patient movement, venous pulsations.

• Electrosurgical interference.

Model 515B/C Service Manual Rev. 01

Cautions

Patient Safety

2.3

Cautions

Caution

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.

• Never sterilize or immerse the monitor in liquids.

• Do not sterilize or immerse sensors except as directed in this manual.

• Excessive tension should not be applied to the sensor cable.

• Do not store the monitor or sensors at temperatures less than 14 °F (-10 °C) or greater than 131 °F (55 °C).

• Do not operate the monitor or sensors at temperatures less than 50 °F (10 °C) or greater than 104 °F (40 °C).

• Federal (U.S.A.) law restricts this device to sale, distribution, or use by or on the order of a licensed medical practitioner.

• Do not stretch the finger sensor open beyond the limit for which it was designed. Overstretching the pulse oximeter finger sensor can damage the sensor and potentially affect pulse oximeter readings. Overstretching can be prevented: avoid opening the sensor by any means other than squeezing the grips; DO NOT force the sensor onto large objects such as a bedrail.

Rev. 01 Model 515B/C Service Manual

Patient Safety

Cautions

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Model 515B/C Service Manual Rev. 01

Front and Rear Panel Illustrations

WAVEFORM DISPLAY ON MODEL 515C ONLY

POWER button - Press to turn the monitor on or off.

Audio key - Press to toggle two minute silence, and reset alert conditions (when active). Press and hold for audio disable.

Pulse Key - Sets pulse rate alert limits when used with the keys. Press and hold to set auto alert limits.

SpO

key - Sets saturation alert limits when

used with the keys. Press and hold to set auto alert limits.

ALERT BAR

SENSOR INPUT

AC indicator - Green when the monitor is connected to AC power and rear panel power entry module switch is set to “|”

(ON). Also indicates the battery is charging.

Battery icon - Green when operating on ba ttery with a charged battery, orange when battery power is diminished, flashes red when battery power is at a critical low.

Finger probe icon -Flashes red when no probe connected or probe off patient. Red for any sensor errors.

Hand icon - Yellow when monitor is searching for valid signal and data is being held.

Increase/decrease keys - Press to set pulse and alert audio level. Sets alert limits when used in conjunction with SpO keys. Press and hold to control graph ics display contrast on Models 515C (Model 515B does not have graphics display option).

Saturation and pulse rate displays - Saturation and pulse rate values will appear. Status messages will appear if necessary, see “Troubleshooting ” on p age 31. Arrows indicate alert status or that alerts are being set.

Rev. 01 Model 515B/C Service Manual

and Pulse

Audio disabled icon - Flashes yellow when the audio has been disabled.

Two minute silence indictor - Illuminates yellow when the audio has been muted for two minutes.

Signal bar - Pulses with respect to monitored pulse rate. Amplitude corresponds to signal strength.

Front and Rear Panel Illustrations

EARLIER REAR PANEL

Ground stud - Use to connect monitor’ s chassis to earth ground.

Rear panel power switch - Set to “|” allows AC mains to power monitor, set to “O” switches A C main s p ower off.

Voltage select/fuse comp artment - Sets mains operating voltage and houses mains fuses.

Power cord entry - P lug power co rd into this recep tacle. Use only hospital grade three wire plugs for connection via supplied power cord.

NEWER REAR PANEL

Ground stud - Use to connect monitor’ s chassis to earth ground.

Voltage select/fuse comp artment - Sets mains operating voltage and houses mains fuses.

Rear panel power switch - Set to “|” allows AC mains to power monitor , set to “O” switches AC mains power off.

Power cord entry - P lug power co rd into this recep tacle. Use only hospital grade three wire plugs for connection via supplied power cord.

Model 515B/C Service Manual Rev. 01

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. 6500-23/65 50- 23).

4.1

4.2

Turning the monitor ON/OFF

The key controls powering the monitor on and off. To charge the battery from AC mains ensure that the power cord is connected and plu gged into a hospital grade three prong outlet. Set the rear panel power switch to | (ON). Che ck that the front panel icon is gree n, this indicates that AC mains power i s connected to the monitor and chargin g the internal battery . The monitor will operate on its internal battery power when the rear panel power switch is set to O (OFF), or if the power cord is removed.

When operating on a fully charged battery the icon on the front panel will turn green. As the battery charge dimini shes and reaches a low le vel the icon will turn orange. When the battery has reached a critical low the icon will flash red . If AC mains po wer is not connected at this time to power the unit and rechar ge the battery, the monitor will flash a red icon, emit an alarm tone, then shut itself off.

Displays

When a sensor is connected to the monitor and detecting pulsatile data the SpO2 and pulse rate values will appear in their respective displays. The signal bar will pulse in accordance to the pulse rate, and on Model 515C, the graphics display will show a plethysmogram (the wa v eform will travel from left to right).

The and indicate conditions regarding sensor activity; poor signal, probe not connected, etc. Refer to the User’s Manual for more detailed information (Cat. No. 6500-23/ 6550-23).

4.3

Rev. 01 Model 515B/C Service Manual

Adjusting Alert Limits

The Model 515B/C can have its alert limits manually adjusted, or automatically adjusted1. To manually set the alert limits press eithe r for SpO Pressing the appropriate key once will allow adjustment of the high limit using the up/down arrow keys. Pr essing the same button twice will allow adjustment of the lo wer aler t limit. If the key is pressed a third time the m onitor will exit the alert limits setting mode and retur n to normal operation and displays.

For example: Press once, use to adjust upper alert limit. Press again, use

to adjust lower alert limit. Press a third time to exit alert limits mode, or wait

for 10 seconds.

1. For automatically set alert limits the monitor must first have acquired valid data on which to base the limits on for a specified amount of time.

limits, or for pulse rate limits.

Summary of Operation

Adjusting Volume Levels

T o acti v ate auto alert limits press and hold either the k ey f or saturation, or the k ey for pulse rate. The monitor will temporarily display the new upper, then lower limits on the saturation or pulse rate display, depending upon which limits were set, then return to normal operating mode.

4.4

4.5

4.6

Adjusting Volume Le vel s

Both pulse beep and alert volume can be separatel y adjusted. To adjust the pulse beep press

, “Pul” will appear in the SpO

through 7. To adjust the alert volume press , “Alr” appears in the SpO

to adjust the alert volume level from 1 through 7.

NOTE: When the monitor is sounding an alert (with audible alerts enabled - not illuminated), the keys will control the alert volume only.

display, use to adjust the volume level from 0

display, use

Muting Alerts

The key controls two minute audio muting, audible alert disable, and alert acknowledge. Pressing will activate the two minute audible alert mute. Press and hold until illuminates to activate audible alert disable. Pressing again will cancel either the two minute mute or the audio disable (which ever is active). Press to acknowledge and reset alert conditions.

Contrast

Press and hold the key to vary the contrast of the graphics display ( on Model 51 5C only ). The SpO the keys to vary the contrast. The moni tor will return to norm al operating mode ten seconds after the last key depression.

display will show “Con” to indicate that the monitor is in contrast adjust mode. Use

2. There is a ten second time-out counter that starts each time the SpO2 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

Electroni c Theory of Operation

The electronic theory of operation of the Model 515B/C Pulse Oximeter is detailed in the subsections below. Refer to Section 13, Schematics and Assembly Drawings, on page 63 for schematics and assembly prints.

5.1

2532/2725 Power Supply Board

The Power Supply Board co ntains the circuitry needed to char ge the battery from th e A C Mains (line voltage). The monitor may be supplied with either the 2532 or the 2725 power supply board. The 2532 board is manufactured with thru-hole components while the 2725 is mostly surface mount technology. The circuitry is identical therefore the theory of operation that follows applies to both assemblies.

5.1.1

AC Mains and Battery Operation Overview

The Model 515B/C is powered from its internal 12 v olt battery that is charg ed when the monitor is connected to the A C line. The g reen (sine wave shaped) fron t p anel indicator illuminates when the line cord is connected and the rear pan el po wer switch is in th e “|” (On) p osition. This indicates that AC Mains power is charging the battery.

If AC mains power is removed by unplugging the line cord, or setting the rear panel power switch to the “0” (Off) position, the monitor will operate for up to eight hours from its internal 12 volt lead-acid battery on a full charge. As the battery voltage runs low ( ≈11.5 volts), the (battery icon) on the front panel will turn orange. At this point, the AC Mains should be reconnected to charge the battery.

If the monitor continues to be powered from a battery in a low voltage situation, at approximately 10.5 volts, a continuous alarm sounds for sixty seconds while the battery indicator will flash red. A “bAt” and “Lo” message will appear in the SpO displays respectively. If this alarm is ignored, the monitor will shut down . The A C mains sho uld be connected to the monitor to recharge the battery before this occurs.

and pulse rate

5.1.2

Rev. 01 Model 515B/C Service Manual

AC Mains Operation

Reference the Overall Wiring Diagram. The AC Mains voltage enters the monitor at the rear panel Power Entry Module (PEM10 1). This device contains a built in RFI power line filter, a double-pole single-throw switch that opens and closes both AC input lines, fuses, and an input voltage selection key.

The filtered, switched, and fused output of the Power Entry Module is fed to the primary coils of the system transformer, T301. Reference the Power Supply schematic 2532-03 or 2725-03. The secondary output from T301 is rectified by D1 (bridge rectifier) and filtered by C1. The (loaded) DC voltage at this point is approximately 20 volts.

The 20 volts DC is fed to the battery charging regulator IC1 (pin 5) through Q1. Biasing for Q1 is accomplished by D2, R1, and R2 when A C po wer is applied. When running on battery po wer ,

Electronic Theory of Operation

Q1 is biased off by R1, R2, and D3. This prevents the battery from trying to power the battery charger regulator.

The output of switching regulator IC1 pin4 is rectified and filtered by D4, C4, and L1, then fed to the battery through current sense resistor R3 and fuse F302, to J302 pin 1 (VBAT+). The battery float charge voltage is maintained at 13.2 volts ex cept for f ast char ge that is re gulated at

14.4 volts. The output is also monitored for over current conditions. These parameters are controlled by IC3 and associated circuitry. When the battery charge current exceeds a preset limit, IC3 pin 7 goes high w hich biases Q2 on, this i n turn shorts out R12 which affects the feedback control (FB) to IC1 (pin 1). With R12 shorted out, the control resistors R14 and R13 set the output voltage to 14.4 volts. When the charge current lowers, IC3 pin 7 goes low which biases Q2 off, this puts R12 back into the feedback con trol which no w consists of R12, R13 and R14; setting the voltage to 13.2 volts. When more than the maximum charge current flows through R3, IC3 pin 1 shorts IC1 pin 2 to ground, that shuts IC1 o ff until its ne xt switching cycle. When the current reaches a safe level IC3 pin 1 allows IC1 to remain on.

Main Board

5.2

Main Board

5.2.1

The 2721 or 2723 Main Board contains all the analog and digital circuitry that controls the sensor, front panel display, and user interface. The isolated power supplies, microprocessor, analog circuits, and memory are all contained on this board . The 2722 or 272 4 ver sion contains the graphics display for model 515C, otherwise the circuitry is identical. Units with the newer 2723 (for Model 515B) or 2 724 (Model 515C) board can be identified with an “X” in the serial number suffix.

Power On/Off Control Circuitry

When connected to the AC line (front panel AC icon illuminates green) the internal battery is charging, this occurs whether or not the monitor itself is turned on. The monitor is powered on by pressing the front panel power key, pressing this key while the monitor is on will shut it off. The actual turning off is contro lled b y the pr ocessor, this enables the processor to control when the power is removed to avoid corrupting RAM contents (e.g. turning power off while writing to, or reading from RAM).

Power enters the main board through J404, see page 4 on schematic. When the monitor is connected to the AC mains power, the LINEST voltage will be high indicating that AC line power is available and charging the battery. The LINEST line will bias the green LED D16 on through current limiter R28 (see page 2 on schematic). This LED illuminates the AC indicator icon on the front panel. When the monitor is running off of its internal battery (no AC mains power av ailab le), the V B ATTERY line will be supplying power for the monito r. This will cause D17 to be reverse biased (LINEST low, VBATTERY @ battery voltage) and no voltage will appear at LINEST, therefore D16 will be biased off.

When the front panel power key is pressed VBATT biases Q8 on through R31, R97, and D18. When Q8 is on, VBATT biases Q10 on thro ugh R9 1 and R92, this in turn powers IC17, a pulse width modulated switching power supply. The LEDPWR supply is generated by IC17, Q11, D32, T1 and filtered by C59-C63 (C89 added on 2723/2724 board). The voltages used by the main board are all derived from the LEDPWR supply.

When the monitor is on and the front panel power key is pressed (to turn the monitor of f), IC10 pin 12 will go low (se e page 1 on schema tic). This will drive the ou tput of IC8 pin 8 (PWRNMI*) low when the KEYS* line is brought low by the processor (IC1 pin 9). The PWRNMI* line drives the NMI line of the processor , when this line is brought lo w the processor will bring the PWROFF line high thr ough IC14 pin 12. When the PWROFF line is high, Q13 will turn on, this in turn sets the PFI input (pin 4) of IC4 low. This will set the PWROFF* line

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Electronic Theory of Operation

IC4 pin 5 low, biasing Q2 on (page 4 on schematic). W i th Q2 on, Q8 and Q1 0 will be biased of f, shutting down IC17 which turns the monitor off.

5.2.2

5.2.3

Power Supplies and Voltage References

See page 4 on schematic. The 5 vol t supply VDD is re gulated b y IC18 , a lo w dropout re g ulator. The -VA supply is generated by IC19 from the LEDPWR supply. This supply is synchronized to front end timing signals by the SYNC line via C82, R127, R120, D35, and Q7. Without this synchronization, ailiasing frequencies m ay interfere with sensor measureme nts. The +VA supply is drawn from the LEDPWR line through filter coil L2.

The LEDSRC supply , used by the sensor LEDs, is regulated by IC20. Fuse F201 protects against over current conditions. This supply is connected to the sensor‘s LED anodes when a sensor is connected.

See page 3 on schematic. A -5 volt, and a 2.5 volt reference (VREF2.5) are needed for the 8 bit D/A conv erter I C31 , the A/D co nverter IC26, and for the 20 bit A/D converters IC23 and IC24. The 2.5 volt reference is generated by IC29 from the +VA supply. The output of IC29 pin 6 (VREF2.5) feeds the input of inverting amplifier IC30a. The output of IC30 a drives the base of Q12 which creates a low impedance -5 v olt source -V5 at i ts emitter. The -5 volt source is used by the eight channel multiplexor IC25, t he 20 bit A/D converters IC23, IC24, and the eight bit D/A converter IC31.

Sensor LED Drive Circuits

Each LED (one red and one infrared) in the sensor is driven separately. Since the circuitry is similar only one channel will be discussed, the corresponding co mponents for the other chan nel will appear in brackets. See page 3 on schematic.

The VLED voltage is used b y b oth chan nel’s drive circuitry. When IC31 is enabled b y the WR* and DA CCS* lines, the processor programs a voltage b y inserting a particu lar v alue on the data lines D0-D7. This voltage appears at the output of IC30b pin 7 and is labelled as VLED.

When the REDLED* [IRLED*] line is low Q3 [Q4] will turn off, this allo ws the VLED volta ge, divided by R48 [R46 ] and R47 [ R49 ], to dr ive the non-inverting inp ut of I C27 a [IC27b ]. Wh en IC27a [IC27b] output is high, Q6 pins 3, 4, 5, 6 [1, 2, 7, 8] will turn on, this pulls current through the sensor LED from the LEDSRC supply (fed to the sensor from J403 pin 1). When the REDLED* [IRLED*] line is high, the input of IC27a [IC27b] is brought to ground potential because Q3 [Q4] is biased on. This shuts Q6 off resulting in no current flow through the LED.

5.2.4

Sensor Photodiode Return Path

Light, from the sensor’s Red or Infrared LED, shines through the pulsating vas cular bed (the patient’s finger, toe, etc.) placed between the LEDs and the photodiode. Some of this light emerges from the tissue and impinges on the photodiode, causing the photodiode to conduct current. See page 3 on schematic. IC21b pins 5-7 are set up as a differential amplifier that converts this input current to a voltage at the amplifier output. The sensors are wired such that photodiode current produces a positive v o ltag e at IC21b pin 7

The voltage at IC21b pin 7 is presented to an analog switch IC28b p in 6. This switch is controlled at pin8 by INSIG* except if the monitor is in a Probe Off Patient condition or is undergoing its self-test at system power up. The switch IC28c pins 9- 11, contro lled from SIGND*

1. The Model 515B/C uses SuperBright™ sensors (part number 87xx series). If a non-SuperBright™ (Novametrix part number 86xx series) sensor is connected, IC4b p in 7 will go negative.

(Input Signal), and will be closed (IC28b pins 6 and 7 connected)

(Signal Ground), will be open

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Electronic Theory of Operation

(no connection between IC28c pins10 and 11) except as noted above for the switch at IC28b pins 6-8. As a result, the IC21b pin 7 voltage passes undisturbed to the high pass filter consisting of R70 and C28.

Main Board

5.2.5

The ASAMP* turn off and the signal at C28 passes through to IC21a pin 3. The ASAMP* high when neither LED is being driv en, causing Q5 to turn on. W ith Q5 conducting, any voltage at C28 is discharged to ground and the ne xt pulse will char ge C28 from a kno wn le vel. If it were not for Q5, any charge remaining on C28 from the previous pulse, or from ambi ent light reaching the photodiode, would be added to the charge from a new pulse—creati ng measurement errors.

If the signal at IC21a pin 1 is the product of the Red LED being turned on, then RDSAMP* go low and close the switch at IC28a pins 2-3. This sen ds the signal to a sample and hold circuit consisting of R75 and C41 (that maintains the signal until next sample pulse arrives), a gain stage (IC22a), a filter/divider network (C40, R81 and R82), and finally, to the Red channel Analog-to-Digital Con vertor (ADC) IC24.

If the signal at IC21a pin 1 is the product of the Infrared LED being turned on, then IRSAMP will go low and close the switch at IC28d pins 14 -15. This sends the s ignal to a sample and hold circuit consisting of R73 and C27 (that maint ains the signal until next sample pulse arrives), a gain stage (IC22b), a filter/divider network (C24, R78 and R79), and finally, to the Infrared channel Analog-to-Digital Convertor IC23.

signal is active low whenever either sensor LED is turned on. This causes Q5 to

line returns to a logic

will

20-Bit Analog-to-Digital Convertor Self Calibration

The 20-bit ADCs are calibrated as part of the syst em self-test which occurs each time the monitor is turned on. At power up, the microprocessor sets the CA L line, and the system calibration input SC1 high. The CS5503 ADC will not operate while the CAL line is high. On the falling edge of the CAL signal, the ADC will initiate a calibration cycle determined by the state of the SC1.

5.2.6

The high at SC1 causes INSIG* opens the switch at IC28b pin8 so that IC28b pins 6 and 7 are no longer connected— disconnecting the returning photodiode signal from the rest of the circuitry. The low SIGND* signal closes the switch at IC28c pin9 and as a result, the input to the C28-R70 high pass filter (and thus the entire ADC input circuitry) is broug ht to ground potential.

The CAL line (which went high at power up) is reset low and ADCs IC23 and IC24 begin their calibration cycles. Because the analog input circuitry is grounded vi a SIGND* offset voltages can be present at the (pin 9 AIN) inputs. The calibration cycle sets the ADC “zero” point to equal this voltage, thus compensating for any circuitry offsets. The ADC then sets its “full scale” point to equal the voltage at its VREF (pin 10) input. This completes the calibration cycle.

The ADC can now start sampling its input and converting it to a 20-bit digital word. The processor resets SC1 to a logic low, causing IC28c pin9 to open and IC28b pin8 to close. The photodiode signal can now reach the ADCs. See Sensor Photodiode Return Path on page 13.

to go high and reset SIGND* to a logic low. The high INSIG*

, only circuit

20-Bit Analog-to-Digital Conversion

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 repr esentation with 20bit resolution based on the input magnitude.

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Electronic Theory of Operation

The CS5503 conv er ter continuo usly samples its input, converts the value to a digital word, puts the word in its output buffer (overwriting previous buff er conten t s), then repeats the process b y again sampling its input. The frequency of the sample/convert/overwrite-buffer sequence is based on the 3.2768 MHz clock signal at the ADC pin 3 (ADCCLK) input.

The microprocessor starts a read cycle of the Infrared channel by bringing IC23 pin 16 (ADCIRCS*) low . A Red chan nel read star ts when IC24 pin 16 (ADCREDCS*) is brought low.

5.2.7

On the falling edge of the ADC’ s CS* the pin-20 SDATA (Serial Data) output. The SDATA line connects directly to the microprocessor’s serial input (RXS) pin. The remaining bits (in descending order) are output from SDATA with subsequent falling edges of the Serial Clock (SCLK) input at pin 19. The SDATA output automatically goes to a 3-state (high impedance) condition after completing a word transmission, thus freeing the data line for other uses (i.e., the other ADC channel).

The Serial Clock rate is significantly slower than the ADC sampling rate. As a result, the ADC rewrites its outpu t buf fer with new inf ormation at a f aster rate than the data can be read from the buffer. No conflict occurs, however , because while CS* does not update its output buffer—the current word is not overwritten. After the processor receives the entire word, it allows the convertor’s CS* sample/convert/overwrite-buffer cycle.

, the output word’s MSB (most significant bit) appears at

is low (d uring th e read cy cle), the AD C

to return high, and the ADC resumes its

Sensor Status Decoding and Conversion

The microprocessor monitors se veral sensor parameters in addition to th e Red and Infrared data channels. It monitors the status parameters, as well as the voltage of the monitor’s internal battery . See page 3 on schematic.

The 8-to-1 multiplexer, IC25, decodes the A0MUX-A2MUX input address lines and connects one of eight status parameter inputs to the multiplexer output at IC25 pin 3. Resi stor R88 and diode D19 preve nt negative voltages from reaching the input to the analog-to-digital converter, IC26.

IC26 is an 8-bit analog-to-digital con vertor with a serial data output. While the IC26 Chip Select (ADC3CS* brought low (under processor control), the most significant bit (D7) of the PREVIOU S data conv ersion becom es a v ailable at the SDA TA pin. The remaining bits (D6- D0) ar e shifted out o n subsequent falling edges of the CLK input. On the clock pulse following the one that shif ts out the least significant bit (D0), the CLK and SDATA lines are returned to 3-state and the ADC performs a new con v ersion based on the input it recei ves from the IC25 channel selected by the A0MUX-A2MUX input address lines.

) input is high, the CLK input and SDATA output are in 3-state mode. When CS is

The ADC sample/convert/store-result cycle is based o n internal chip timing and not the CLK input which (along with CS high once the ADC cycle begins.

5.2.8

Rev. 01 Model 515B/C Service Manual

Front End Timing Signals

See page 1 on schematic. A 14 stage divider IC6, acts as a timing sequencer. The ADCCLK input is the clock input, the RESET line is the clear input, used for clearing the chip at power up. The Q4-Q11 outputs of IC6 are divided down from the clock input and feed IC13, the data sampling controller. The Q14 output of IC6 is used as an interrupt that is genera ted 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 th e front en d timing s ignals. These

) only controls serial data output. Thus the CS line is free to return

Electronic Theory of Operation

signals control the sensor LED drive and the photodiode’s return path circuitry during normal operation and calibration.

The RESET and SC1 lines control when the outputs of IC13 are active, both these lines must be low in order for IC13 to operate normally. The RES ET line controls IC13 during power up, while the SC1 line is under processor control and will toggle when a probe o ff patient alert e xists and during the power up self test.

Main Board

Signal Description

5.2.9

INSIG* Input Signal

RDLED* Red LED

IRLED* Infrared LED

SIGND* Signal Ground

ASAMP* Analog Sample

SYNC Synchronization

IRSAMP* Infrared Sampling

RDSAMP* Red Sampling

This line will enable signals from the phot odiode, or prevent signals from the photodiode from reaching the detection circuitry.

Controls the signals for the Red Led in the sensor.

Controls the signals for the Infrared Led in the sensor.

This is used to short out the inputs of the detection circuitry so that the system can compensate for offsets.

This line is used to short out the capacitor used in the sample and hold circuitry to avoid having residual charge i nterfere with data sampling.

Synchronization signal used for the -VA supply.

Used for sampling the Infrared signal response from the photodiode.

Used for sampling the Red signal response from the photodiode.

Sensor Status Parameters

The sensor (and battery) status parameters input to the multiplexer IC25 (page 3 on schematic) are described below.

ADCFEDC: Photodiode DC Level. Resistors R66, R67 and capacitor C33 f orm a voltage divider and low pass filter that provide a measure of the mean DC level at the output of the photodiode current-to-voltage amplifier IC21b pin 7. This signal is used in determining ambient light interference. If this line is examined while the sensor’s Red and Infrared LEDs are turned of f, then any DC level at IC21b pin 7 must be the result of ambient light imp inging on the photodiode. I f the DC shift is in excess of limits set in the software, a light interference message appears on the monitor’s display.

ADCLPWR: Sensor LED Supply Voltage. This channel, at IC25 pin 12, monitors the sensor LED supply v oltage thr ough a voltage di vider consisting of R113 and R114. If a fault occurs that causes the LED supply fuse F201 to blow, or if the sensor wires are shorted, this channel reports the condition and the monitor will indicate an error condition.

ADCIRLED: Infrared LED Cathode Voltage. A low pass filter consisting of R60, R61 and C51 provides a means to measure the cathode voltage of the sensor’s 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).

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Electronic Theory of Operation

BATLEV1: Battery Level 1 The monitor’s battery voltage is divided down by R9 4 and R106. The voltage at IC25 pin 1 is monitored, and if its magnitude is less th an a pre determined v alue ( encoded in th e softw are) the monitor indicates a low battery warning.

BATLEV2: Battery Level 2, this signal is not used as of this writing. LINEST: The LINEST line from the power supply is divided down by R94 and R106. The

voltage at IC25 pin 2 is monitored to determine if the AC mains is connected and charging the battery.

ADCRDLED: Red LED Cathode Voltage. A low pass filter consisting of R58, R59, and C50 provides a means to measure the cathode voltage of the sensor’s Red LED. If the channel at IC25 pin 4 is sampled the monitor can determine if the LED is open circuit (zero volts at IC25 pin 4) or operational (approximately 2.5 volts at IC25 pin 4).

ADCVRD: This signal is not used as of this writing (not shown on 2723/2724 board). ADCVIR: This signal is not used as of this writing (not shown on 2723/2724 board).

5.2.10

Serial I/O Controller

See page 1 on schematic. Digital data from the three Analog-To-Digital Convertors is read by the CPU through its clocked serial data inp ut (SD ATA) at IC1 pin 56. The PEEL IC7 acts as the Clocked Serial Input/Output (CSI/O) Controller .

Except during power up or Watchdog Timer reset, IC6 pin 3 prov ide s an interrup t to the CSI/O controller in the form of a 5 millisecond period square-wave input to IC7 pin 7 (INT5MS).

On the rising edge of INT5M S, a CPU interrupt request is generated whe n IC7 pin 18 (CPUINIT* at IC7 pin 6 low . (Th is CKS line is inactive h igh unless a serial receiv e operation is in progress.) The CPU also sets up the ADC decode lines AA1 and AA0 at IC7 pins 5 and 4, and as a result, one of the ADC chip select lines (ADCIRCS* the CPUINIT*

On the rising CKS signal a CLKS output pulse at IC7 pin 14 is sent as a serial clock input to the ADC selected by the decode lines. Decode results are shown below.

) goes low . The CPU responds by sending the clock input to CSI/O controller (CKS)

, ADCREDCS*, ADC3CS*) is brought low, and

line is disabled.

AA1 AA0 Decode

0 0 Red LED 20-bit ADC 0 1 Infrared LED 20-bit ADC 1 1 Sensor Status 8-bit ADC 1 0 Internal CSI/O signal (TEND)

Successive CKS/CLKS pulses cause the ADC data to be shifted out of the ADC (most significant bit fir st) along the serial data line (SDA TA) to the CPU serial input (RXS) at IC1 pin

56. 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.

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Electronic Theory of Operation

After all three ADCs have been read, the CPU sets the AA1 and AA0 decode lines to exert the internal TEND signal and set the 8-bit AD C to the next channel (so that it has time to settle before the next read of the A DC). This re-enables the CPUINIT line. At this point the CSI/O controller is reset awaiting an INT5MS pulse to begin the cycle again.

Main Board

5.2.11

5.2.12

Microprocessor and Memory

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

The system program is contained in IC3 a 27CC101 EPROM, when both RD* and ROMCS* are low a read operation is perfor med on IC3. The ROMCS* line is controlled by the ME* line (Memory Enable) and ad dress line A17 . When bo th the ME* line and add ress line A17 are low, the ROMCS* line will go low (IC9 pin 6), this enables IC3.

System RAM is contained in IC2. When both the RD* and RAMCS* lines are brought low, a read operation is performed on IC2. With both WR* and RAMCS* low, a write operation will be performed. The RAMCS* line is controlled by the ME* line and address line A17. When address line A17 is brought high, and the ME* line bro ught low, IC9 pin 3 will go low activ ating the RAMCS* line. The ability of the RAMCS* line to reach the chip select of IC2 is controlled by Q15, unless the VDD supply is established, neither a read nor write can be perf ormed on IC2 (system RAM).

Decoding

A three to eight line decoder I C11, is used for decod ing variou s write, enable, and interrupt lines for the system. Address lines A4, A5 , A6, and A7, an d the IOE* (inpu t output enab le) and LIR* (load instruction register) lines from the processor , will enable one of the Q outputs of IC11. The table below lists the lines that are controlled by IC11.

Name Function

DACCS* Digital to Analog Controller Write

DISPCS1* Display Chip Select 1

DISPCS2* Display Chip Select 2

TONECS Tone Chip Select

INT1* Interrupt #1

PWRNMI* Power Non-Maskable Interrupt

PORT1WR Port #1 Write

Enables IC31 for writing, this controls the LED voltage VLED.

Control signal for the graphics display (if installed)

Chip select for the tone generator IC32, and digital potentiometer IC33.

Spare interrupt (not shown on 2723/2724 board)

This line turns the monitor off. When the PWRSWIN line is brought high (by pressing the front panel POWER key) and the KEYS* line is low, the PWRNMI line will signal the processor to shut off.

This line is controlled by the WR* line of the processor and the PORT1CS* line from IC11. It enables writing to IC12, this controls the multiplexer lines, SC1 line for the 20 bit A/D Converters, control lines for IC7, and the LOAD line for the displays.

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PORT2WR Port #2 Write

RDKEY* Read Keypanel

Electronic Theory of Operation

Name Function

Controlled by the WR* line and PORT2CS* from IC11. This line will enable writing to IC14. The 20 bit A/D converter CAL line, front panel LEDs, and power off control are handled by IC14.

The KEYS* and RD* control this line that enables IC5 to read the keypanel for key depressions and the configuration header J406.

CNTRCS* Contrast Chip Select

5.2.13 Microprocessor Supervisor

A microprocessor supervisory integrated circuit IC4 monitors the VDD power supply for low voltage conditions, and the WDOG (watchdog) line to verify that the processor is st ill in control of the monitor. A failure of either of these two conditions will result in the monitor being shut off. It also controls turning the monitor off during a normal power down, see Power On/Off Control Circuitry on page 12.

5.2.14

System Output Ports

There are two output port chips IC12 and IC14, that control various lines for system control. The first port IC12, enabled when POR T1WR is high, contr ols the CSIO PEEL IC7, the analog multiplexor IC6, and the 20 bit analog to digital converters IC23, and IC24. The second port IC14, enabled by the PORT2WR line, handles the front panel LEDs and the CAL line for the 20 bit A/D convertors. The second port also controls turning the monitor off through the PWROFF line.

The output ports are selec ted by th e decoding perfor med by IC11 and the W R* line. The sign als controlled by the ports are listed below with a brief description of their function.

Signal Description

AA0-AA1 Decode line for selecting ADCs.

Select line for the digital potentiometer IC34, used to adjust the contrast on the optional graphics display.

SC1 Used for 20 bit ADC calibration. LOAD Control line for the display driver IC15 A0MUX-A2MUX Selects one of six channels that will be switched to the serial A/D

converter for conversion. NEXT* Used in decoding selection of ADCs. CAL De-activates the 20 bit ADCs prior to calibration. 2MIN_LED Illuminates the 2 minute mute LED, D13. AUD_OFF_LED Illuminates the audio off LED, D14. WAIT_LED Biases Q9 on, which in turn illuminates the hand LED, D8. KJL 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.

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Electronic Theory of Operation

PWROFF Turns the monitor off, under processor control.

5.2.15 Displays

The front panel visual interfac e is made up of LE Ds, the only exception is t he Model 515C graphic display (an LCD DOT matrix). Both saturation and pulse rate displays consist of three seven segment displays with decimal points (for a total of six displays). The signal bar is a 10 segment LED array, the remaining indicators are LEDs. See page 2 on schematic.

The saturation and pulse rate displays are seven segment LED displays that are controlled by IC15, a display driver. In addition to controlling the eight segment displays, IC15 also handles the pulse bar, up/down arrow LEDs for saturation and pulse rate error displays, and the finger sensor icon LED. The remaining LEDs are controlled by their own signal lines.

Main Board

Signal Description

5.2.16

LED

Alert Bar (D28-D31)

Battery (D15)

D14

D13

D33

Audio Drive Circuitry

Signal Line

When the KJL line is brought high (from IC14 pin 15) MOSFET Q1 will turn on drawing current through LEDs D28-D31.

Diode D15 is a bicolor LED that is controlled by the RED_BAT and GRN_BAT lines. When both lines are high the LED will appear orange, otherwise it will be the color of the active line (red or green).

The AUD_OFF_LED (audio off) is generated from IC14 pin 17. The 2MIN_LED line from IC14 pin 18 will illuminate the 2

minute audio mute LED when brought high. Diode D8 is an LED bar that is actually made up of four LEDs

housed in a common package. When the WAIT_LED signal from IC14 pin 16 is brought high then MOSFET Q9 will turn on, this will draw current through the four LEDs illuminating D8.

Diode D33 is an LED bar that actually consists of four LEDs in a single package (same as D8). When the SEG_DP line from IC15 is brought high, and the DIG1_1-DIG1_4 lines are brou ght low diode D33 will illuminate.

The audio in the Model 515B/C is both frequency and volume adjusted, see page 4 on schematic. The speaker LS1 is driven b y audio amplifier IC16, volu me 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. When the TONECS* line from IC11 (pin 12) and the WR* lines are brought low, the AUD_INC* line from IC9 pin 8 will be brought low. At this time, the state of the A0 line will dete rmine if IC33 is incremented or decrement ed (high = incremented, low = decremented). When incremented the volume will in crease, and when decremented the volume will decrease.

The tone frequenc y is controlled b y IC32, a tone gen erator. When the TONE_CS line is brought high IC32 is written to by data lines D0-D5. The data on these lines will select the desired tone for amplification by the audio amp IC16.

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Main Board

5.2.17 Keypanel and Configuration Header

The processor continually scans the keypanel for a ke y depression, see page 2 on schematic. The keypanel inputs enter the board at J402, these inputs are tied high by pull up resistors R33-40. When a front panel key is pressed the appropriate line is brought low.

When a key is pressed the corresponding input to IC5 is brought to a logic low, thi s is then transferred to the appropriate output pin. When the RDKEY* line is brought low that s ignal is read by the processor’s data lines. The configuration headers are r ead in the same manner. When activated, a jumper connects a TSW line to ground (either TSW1-TSW3). At power up these lines are read by the processor and the configuration, if any, is performed.

5.2.18 Graphics Display

The Model 515C includes a graphic display for the plethysmogram, see page 2 on schematic. The display connects to the main board at J401. The following lines are used to communicate with the display:

A0 When high signals data in, when low signals instruction commands. D0-D7 Data/command input lines

Electronic Theory of Operation

DISPCS1* DISPCS2*

RESET* Reset line from the processor. WR* Write line from the processor. E Clock signal from the processor. VLC Contrast control voltage from Q16/IC34.

2721/2722 contrast circuit

The contrast is controlled by digital potentiometer IC34, and transistor Q16 (see page 4 on schematic). A voltage divider is set up by R121, IC34, and R122 from -VA to ground. The “wiper” position of IC34 is controlled by the CTRSTCS* and A0 lines. The v oltage le v el at pin 5 is then varied and controls the bias on Q16. The output voltage at the emitter of Q16 (VLC) controls the contrast level of the display.

2723/2724 contrast circuit

The contrast is controlled by digital potentiometer IC34, and amplifier IC35 (see page 4 on schematic). A voltage divider is set up by R121, IC34, R122/R130 from the -V5 supply to ground. The “wiper” position of IC34 is controlled by the CTRSTCS* and A0 line s. The voltage level at pin 5 is then varied and this is reflected at the output of IC35 (VLC), controlling the contrast level of the display.

The backlight for the display on the 2723/2724 boards is pulsed rather than dri ven continu ously in order to conserve energy. The circuitry is displayed on page 1 of the schematic. The Q8 and Q9 outputs from IC6 drive the input of OR gate IC8 pins 11, 12, 13. The output is then AC coupled to Q16 which turn on and o ff in a 75% duty cycle. When Q16 is biased on the back light is on, when Q16 is biased o f f the back light is off (R32 is not installed int he 2723/2724 boar ds).

Display chip enable lines. Each line enables 1/2 of the display.

2. The TSW1 configuration header will disable the audible alert muting if set, the remaining lines are for internal Novametrix use.

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Electronic Theory of Operation

Main Board

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Model 515B/C Service Manual Rev. 01

Maintenance

This section contains maintenance information for the Mod el 515B/ C monitor and accessories.

6.1

Cleaning and Sterilization

Follow the cleaning and sterilization instruc tions listed below to clean and/or sterilize the monitor and its accessories.

6.1.1

6.1.2

6.1.3

Monitor

• Turn the monitor off and unplug the line cord from the AC mains before cleaning.

• Clean the monitor surface with a damp cloth.

• Do not immerse the monitor.

• Do not attempt to sterilize the monitor.

SpO2 Finger Sensor

• Clean the finger sensor surfaces with a damp cloth.

• Ensure that the finger sensor windows are clean and dry before reuse.

• Do not immerse the finger sensor.

• Do not attempt to sterilize the finger sensor.

• Perform a “Quick Check” to verify the integrity of the sensor. See User’s Manual.

SpO2 Y-Sensor

• The Y-Sensor may be immersed (up to the connectors) in a cold liquid sterilant (e.g. Cidex™). Refer to sterilant manufacturer’s instructions and standard hospital protocol.

• Clean the Y-Sensor surfaces with a damp cloth.

• Rinse thoroughly with water and dry before use.

• Do not attempt to sterilize Y-Sensor except as stated above.

• Do not immerse connectors on the Y-Sensor.

• Perform a “Quick Check” to verify the integrity of the sensor. See User’s Manual.

6.1.4

6.1.5

Rev. 01 Model 515B/C Service Manual

Y-Strip Tapes and Foam Wraps

• Treat Y-Strip tapes and foam wraps in accordance with hospital protocol for singlepatient use.

Ear Clips

• Clean the ear clip with a damp cloth.

• Do not immerse the ear clip.

Maintenance

Battery Maintenance

6.2

6.3

Battery Maintenance

If the monitor has not been us ed or powered by AC mains for an ext ended time (3 months or more) allow the battery to charge overnight before use. To charge the battery connect the AC mains and set the rear panel power switch ON (|). Check that the front panel battery icon is green. This will ensure a fully charged battery in the event battery p ower is desired. See “Assembly Exchanges” on page 29 for instructions on battery replacement.

Replacing AC Mains Fuses

Depending upon which power supply assembly is install ed in the monitor, replacing the fuses and adjusting the mains supply voltage will differ. Determine which as sembly is installed then follow the appropriate instructions.

EARLIER POWER ENTRY MODULE

NEWER POWER ENTRY MODULE

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 VA C 0.5 A 250V 515023 200-240 VAC 250mA 250V 515033

Model 515B/C Service Manual Rev. 01

Replacing AC Mains Fuses

6.3.1 Assemblies with the earlier Power Entry Modules

1. Turn off the monitor. Set the rear panel AC mains power switch to “0” and disconnect

2. Place a screwdriver into the fuse access slot and pry open the fuse access door.

the line cord from the monitor.

Maintenance

LINE CORD RECEPTACLE

115Vac

VOLTAGE SELECT INDICATOR

3. W ith the fuse access door open pull the fuse(s) out by pulling on the point of the arrow indicator, the fuse holder assembly will slide out.

FUSE HOLDER ASSEMBLY

115Vac

FUSE HOLDER ASSEMBLY

4. After replacing the fuse(s), snap the fuse-holder assemblies into the power entry module assembly and shut the fuse access door.

POWER SWITCH

FUSE ACCES SLOT

6.3.2

Assemblies with the newer Power Entry Module

1. Check that the monitor is OFF.

2. S et the rear panel power entry module switch to OFF (“O”). Remove the line cord from the power entry module (if connected).

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 ACCESS DOOR

FUSE HOUSING

Rev. 01 Model 515B/C Service Manual

Maintenance

4. Pry the fuse housing out from the power entry module.

NOTE: 5mm X 20mm fuses

FUSE HOUSING

3AG TYPE 5 X 20mm TYPE

5. Replace the blown fuse(s) with the proper type and rating.

are installed t oward t he “back” of the fuse ho using as shown

Changing AC Mains Voltage

6.4

6. Re-install the fuse housing. When positioning the housing into the power entry module ensure that it is ori ented correctly. Pre ss the fuse housing back into the power entr y module.

7. Close the fuse access door and verify the proper mains operating voltage is displayed.

MAINS OPERATING VOLTAGE

115V

Changing AC Mains Voltage

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 VA C 0.5 A 250V 515023 200-240 VAC 250mA 250V 515033

6.4.1 Assemblies with the earlier Power Entry Module

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

Changing AC Mains Voltage

3. Using needle-nosed pliers, pull the voltage selector drum from the power entry module.

4. Set the voltage selector drum so that the printed side of the correct voltage faces you.

Maintenance

Note the orientation of the drum; the proper voltage should face out.

VOLTAGE SELECTOR DRUM

115Vac

The voltage selections are pictured below.

6.4.2

115Vac

230Vac

5. Snap the voltage sele ctor drum back into the power entr y module. Be sure that th e voltage setting Indicator shows the proper voltage. Close the fuse access door.

Assemblies with the newer Power Entry Module

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

Maintenance

Changing AC Mains Voltage

3. Using a flat blade screwdriver, pry the fuse access door open to expose the fuse housing. Pry the fuse housing out from the power entry module.

FUSE HOUSING

FUSE ACCESS DOOR

4. Install the proper type and rating fuse for the mains voltage setting required.

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

6. Close the fuse access door and verify the proper mains operating voltage is displayed.

MAINS OPERATING VOLTAGE

115V

SET FOR 200-240V OPERATION

230V

Model 515B/C Service Manual Rev. 01

Assembly Exchanges

Maintenance

6.5

Assembly Exchanges

Disassembly should be p erformed by qualified service perso nnel only . F ollo w proper grou nding precautions to avoid damage to internal components from static discharge.

6.5.1

6.5.2

6.5.3

Internal Assemblies

1. Ensure that the monito r is O FF. Disconn ect the l ine cord and sensor. Turn the monitor upside down and remove the four cover screws from the bottom cover. Hold ing both case halves together, flip the monitor right-side up.

2. Carefully lift the top cover from the monitor (use a gentle rocking motion to lift first one side and then the other side a little at a time). Set the red alert lens aside along with the top cover for safe keeping.

3. The separate assemblies of the monitor can now be removed.

Main Board/Keypanel Assembly

1. Unplug the power cable from J404 on the main board. Di sconnect the sensor cable from J403 on the main board.

2. The main board/keypanel assembly can then be lifted from the bottom case assembly.

Power supply assembly

1. Unplug the power cable from J302 on the power supply board. The power supply/ rearpanel assembly can then be lifted from the bottom case assembly.

6.6

6.5.4

Replacing the internal battery

1. Unplug the power cable from J404 on the main boa rd. Disconnect the positive and negative leads from the battery.

2. Slide the battery bracket out from the bottom cover assembly.

3. Remove the old battery and replace with the new one.

Some batteries may be secured to the battery shield with double sided tape. This is placed in between the shield and the bottom of the battery . To remove, work the battery back and forth to loosen the grip of the tape, then pull the battery out.

4. Replace the battery bracket. Reconnect the positive (red) and negative (black) leads to the battery. Reconnect J404 on the main board.

Changing System Software

New software releases may be made available from time to time. These new releases may add features or be maintenance upgrades. The system software is contained in EPROM IC 3 on the main board.

Be sure to observe proper grounding procedures to avoid possible damage to electronic circuits from static discharge.

To install a new EPROM:

1. Follow the steps listed in “Assembly Exchanges” on page 29 to remove the main board and keypanel asse mblies. Be sure to dis connect the power cable from J404 o n the main board to ensure that power is removed from the board.

Rev. 01 Model 515B/C Service Manual

Maintenance

Changing System Software

2. Disconnect the keypanel from the main board, set aside in a safe place.

3. Use a small flat blade screwdriver, or an IC extraction tool to pry the EPROM from its socket. Be careful not to bend any pins.

LOCATION OF PIN 1

4. Install the new EPROM in the socket. Be sure to align pin 1 of the new EPROM with pin 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.

EPROM IC3

Model 515B/C Service Manual Rev. 01

Troubleshooting

Certain conditions may evo k e special messages in the saturation and pulse rate displays. These displays and the conditions are listed below. Note that “Err” stands for error, but does not necessarily indicate a malfunction. Also, err or condition s one and tw o are inter nal only, and are not displayed.

Low signal strength. Pulse strength as detected by the sensor is too small for proper monitor operation. This message will disappear once the problem is corrected.

Insufficient light. Sensor is placed on a site too thick (or opaque) for adequate light transmission. This message will disappear once the problem is corrected.

Pulse out of range. Pulse must be within 30 -250 beats per minute inclusive. This message will disappear once the problem is corrected.

Rev. 01 Model 515B/C Service Manual

Troubleshooting

Light interference. Ambient light source (sunlight, warming lights, etc.) are interfering with sensor operation. Shi eld sensor from these light sources. This message will disappear once the problem is corrected.

Sensor fault. Remove sensor from use and contact qualified service personnel.

Monitor fault. Record the error number that appears in the pulse rate display (XX will vary, depending upon the fault). Remove the monitor from use and contact qualified service personnel (report the number that appears in the pulse rate display).

Bad Signal. Monitor not receiving valid signals from sensor. May be caused by exces sive motion, cardiac arrhythmia or other situations leading to poor signal. Check patient status, reposition sensor. This message will disappear once the problem is corrected.

Model 515B/C Service Manual Rev. 01

Functional Test

The functional tests verify the overall functional integrity of the monitor and sensor. If the monitor and sensor do not pa ss these tests, remove from u se and contact the No vametr ix Service Department for repair/replacement assistance.

8.1

Equipment required

• Line cord (supplied with unit) PN: 600026

• SuperBright™ Sensor (Finger sensor-PN: 8744, or Y-Sensor-PN: 8793) with OxySnap ™ extension cable-PN: 8853 (8 ft), 8898 (12 ft), or SuperBright™ Sensor (Finger sensor8776, or Y-Sensor-PN: 8791). 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

Functional Test

8.2

Functional Test

1. With the unit off, plug the line cord to the rear pa nel power entr y modu le, then into a n unswitched three prong hospital grade plug.

power entry module

rear panel power switch

AC line cord

2. Set the rear panel power switch to “|” (ON).

3. Check that the front panel icon illuminates green.

4. Turn the monitor on by pressing the key. Check that the monitor powers up:

An audible series of beeps will be produced, all displays and LEDs will briefly illuminate, then the revision level wi ll appear in the saturation display, and “515” will appear in the pulse rate display. The monitor will then enter normal operating mode.

5. Verify that the illuminates red.

6. Attach the sensor, check that flashes and the SpO “- - -”.

If using the Y-Sensor, hold the heads of the sensor so that they face each other (the red light shines at the detector).

and pulse rate displays show

SuperBright™ 8700 series sensor connector

Model 515B/C Service Manual Rev. 01

Functional Test

7. Apply the sensor:

Finger sensor:

Y-Sensor:

Squeeze here to open sensor

Set tip of finger against placement guide

This center strip may be removed if desired or if used with 20mm tapes

Functional Test

finger style applicationwrap style application

20 or 25mm wrap style 20-25mm finger style foam wrap

8. Check for reasonable SpO that the pulse bar pulses. On Model 515C, check for a plethysmog ram waveform in the graphics display.

9. Press , check that “PUL” appears in the SpO as displayed in the pulse rate display, to 4. Press the key to exit the pulse volume mode.

The pulse beep volume level can be adjusted from level 0 (muted), to level 7 (loudest). If the

key is not pressed then the monitor will automatically return to normal di spla y mode after

a ten second time out from when the last or key was pressed.

10. Verify a pulse beep in sync with the pulse bar (and plethysmogram on Model 515C).

11. Press and hold for three seconds, verify that the monitor beeps twice, then displays SpO

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.

auto limits in the SpO2 window.

and pulse rate values in the appropr iate displays. Ve rify

display. Press and set the level,

Rev. 01 Model 515B/C Service Manual

Functional Test

12. Press and hold for three seconds, verify that the monitor beeps twice, then displays Pulse Rate auto limits in the pulse rate 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.

13. Remove the sensor from yourself (do not unplug from the monitor), check that an alert sounds, and the alert bar flashes. Press , verify that the alert tone is muted, and the alert bar no longer flashes.

14. Reapply the senso r, check that SpO

15. T urn the rear panel power switch to “O” (OFF) to verify that the monitor will operate from battery power. Let the monitor run for a few minutes, check the color of the icon.

Green indicates that the battery is suf ficiently charged to run the monitor. Orange indicates that the battery requires charging. Flashing red indicates that the battery is extremely weak and if battery operation is continued the monitor will turn itself off.

If the icon is flashing red the battery requires charging. 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.

and pulse rate values reappear.

Model 515B/C Service Manual Rev. 01

Electronic Tests

The electronic tests verify the operation of the electronic circuits within the Mode l 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 T e st” on page 33.

The electronic tests should be performed by qualified service personnel. The Model 515B/C contains static sensitive devices. Follow proper grounding precautions when handling the internal components to a void damage fro m static discharge. See “Assembly Exchanges” on page 29 for disassembly of the monitor for these tests.

If the monitor does not pass the electronic tests, remov e it from use an d contact th e Nov ametrix Service Department for repair/replacement assistance.

This procedure assumes the technician perfor ms each step as indicated - lea v ing the mon i tor in a known state prior to performing the next step. If steps are omitted or performed out of order, be sure that the monitor is set to the correct state before continuing.

9.1

Assembly Tests

This procedure assumes the monitor is assembled with the exception of the top cover that has been removed.

9.1.1

9.1.2

Equipment Required

Power Supply

1. With the line cord disconnected from the monitor and the power switch set to “0” remove the connector from J302 on the power supply board. Carefully remove the power supply/rear panel assembly from the unit.

• Line cord (supplied with unit) PN: 600026

• TB500B Sensor Simulator PN:5530-00 This is the same device used by factory technicians to calibrate the monitor prior to shipping. If you own an earlier device, the TB500A, contact the Novametrix Service Department for details on upgrading to the TB500B. NOTE: The 5453- 00 ad apter cable must be used in conjunction with the 5977-00 adapter cable if using the TB500A.

•100Ω 10 Watt resistor (for power supply testing)

•10Ω 10 Watt resistor (for power supply testing)

• 1N5820 diode or equivalent (for power supply testing)

• Digital Volt Meter (DVM)*

• DC Power Supply* *Calibrated and NIST traceable

2. Unplug the power cable from J404 on the ma in board, this disconnects the batter y. Measure the voltage across the battery leads, verify at least 11.5 volts DC.

Rev. 01 Model 515B/C Service Manual

Electronic Tests

Assembly Tests

3. Connect the line cord to the power entry module (power supply/rear pan el assembly).

Be careful-line voltage is now present on the power supply/rear panel assembly.

Set the power switch to “|”, measure the voltage at J302, ver ify 13.2 VDC (use the negative terminal of C1 as ground reference for all measurements).

4. Measure the voltage across the positive ter minal of C1 (VIN), verify approximately 25 ± 2VDC.

5. Measure the voltage on pin 3 of E302 (LINEST) with the DVM, verify 5 ± 0.2 VDC.

6. Monitor the voltage at F302 (VBATT) with the DVM, attach the 100 Ω resistor across the terminals of J302. Verify the voltage is 14.1 ± 0.4 VDC. Disconnect the resistor.

7. Connect the anode of the diode to pin one of J302, then the 10 Ω resistor between the cathode and pin 2 of J302 (see below). Verify that the voltage oscillates, this checks the current limit circuitry.

1N5820 10 Ω 10W

J302

8. Disconnect the diode/resistor from J302.

9. Set the power switch off “0”, remove the line cord from the power entry module. Reinstall the power supply/rear panel assembly, connect the power cable to J302 on the power supply board, reconnect the power cable to J404 on the 2721 or 2722 main board/keypanel assembly. NOTE: Be sure all connections are oriented properly to avoid damage to the unit.

10. Disconnect the positive terminal (red) from the battery. Carefully set the cable aside so as not to accidentally come into contact with any conductive surfaces or boards inside the monitor.

11. Reconnect the line cord and place the power switch to the ON “|” position. Verify the icon on the front panel illuminates.

12. 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 2721/2722 main board for voltage measurements.

13. Use TP2 GND as reference, measure the voltage at F202, verify +13 to +14 VDC.

14. Set the rear panel power switch to OFF “O”, then remove the line cord.

15. Reconnect the battery to the power cable.

9.1.3

Main Board

This procedure assumes the monitor is assembled with the exception of the top cover that has been removed.

1. Attach the line cord to the moni tor, set the rear panel power switch ON “|”. Verify the icon on the front panel is green.

2. Carefully lift the main board/keypanel assembly from the bottom cover to separate the

keypanel from the main board. This i s to expose test points on the main boar d for voltage measurements.

Model 515B/C Service Manual Rev. 01

Assembly Tests

Electronic Tests

3. Press to turn the monitor on.

4. Monitor pin 6 of IC19 , check for sync pulses. Check that the pulse amplitude is a bove 50mv (best to AC couple the oscilloscope).

5. Verify the following voltages, use TP16 AGND as reference:

TP1 VDD +4.90 - 5.10 VDC TP4 -V5 -4.88 - (-)5.12 VDC TP11 +VA +8.88 - 9.22 VDC TP10 -VA* negative value of + VA w/-550mv tolerance TP12 LEDSRC* positive value of +VA w/-2.5 volt tolerance

(no sensor connected) TP13 LEDPWR +8.88 - 9.22 VDC (no sensor connected) TP3 VREF2.5 +2.5 VDC (1mv tolerance)

*These voltages are based on the +VA su ppl y value with the listed tole rance.

6. Situate the keypanel so as to gain easy access to the keys without stressing the ribbon cable. Check that finger sensor icon is illuminated (probe not connected).

7. Connect the TB500B. Set as follows:

SENSOR TYPE: 87XX POWER ON: ON ATTENUATION: 3 SATURATION: 92

8. Ve rify a Pulse Rate of 59-61 and Saturation value of 90-94. Finger sensor and hand icons should be off.

9. Adjust pulse beep volume using up/down arrows on keypanel. Verify the volume increases and decreases.

10. Set TB500B SATURATION to 62, verify the alert bar flashes and alar m tone sounds. Press , verify the alert tone mutes and the icon flashes.

11. Set TB500B SATURATION to 92, verify Saturation display updates and alert bar stops flashing.

12. Press and hold the button until the LED illuminates.

13. Verify the following SpO and SATURATION setting s on the TB50 0B Sensor Simula tor. Note that the pulse rate should remain stable at 50-61 beats per minute.

SAT.

SETTING

100 3 98-100 98-100

92 3 90-94 90-94 82 3 82-86 80-84 72 3 75-79 70-74

values on the monitor for each of the SIGNAL ATTENU ATION

SIGNAL

ATTEN.

Monitor’s SpO

TB500A TB500B

display

Rev. 01 Model 515B/C Service Manual

Electronic Tests

Accuracy Test

SAT .

SETTING

62 3 67-71 60-64 62 7 N/A N/A 72 7 74-80 68-76 82 7 80-88 78-86 92 7 88-96 88-96

100 7 98-100 98-100

14. Set the SIG ATTEN to 1, verify that finger sensor icon and the alert bar flash (probe off patient indication).

15. Press and hold the RED button on the TB500B, verify “Err” appears in the saturatio n display, and “-7-” appears in the pulse rate display. Release the button.

16. Press and hold the INFRARED button on the TB500B, verify “Err” appears in the saturation display, and “-7-” appears in the pulse rate display. Release the button.

17. Power down the board by pressing .

18. Disconnect the power supply at J404 on the main board. Set an external DC supply to +13.8 VDC. Attach the supply to J404, obser ve polarit y (pin 3 is +, pin 4 is -).

19. Turn the board on by pressing . After the power up sequence check that the battery icon is green.

SIGNAL

ATTEN.

Monitor’s SpO

TB500A TB500B

display

9.2

20. Adjust the external supply between 11.06 to 11.45 volts, verify the battery icon is now orange.

21. Adjust the external supply between 11.00 to 10.45 volts, verify the battery icon is flashing red.

Accuracy Test

The accuracy tests verif ies the performance accurac y of the Model 515B/C Pulse Oximeter . This test uses the Model TB500B Sensor Simulator (available fro m Nova metrix 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. Owners of the TB500A should contact Novametrix Service Department for details on upgrading to the T B500B. Note that the TB500A, used in conjunction with the 5453-00 adapter cable may be su bstituted for the TB500B in most parts of this test.

9.2.1

9.2.2

Equipment Required

• AC line cord (supplied with unit) PN: 600026

• TB500B Sensor Simulator (or TB500A, see note above) PN: 5530-00

Test

1. Attach the line cord to the monitor. Set the rear panel power switch ON “|”. Check that the front panel icon is green.

2. Do not connect any sensor or the TB500B Sensor Simulator at this time.

3. Press the key to turn the monitor on. A series of audible tones will occur.

Model 515B/C Service Manual Rev. 01

Accuracy Test

Verify all the LEDs and segments briefly illuminate. The software revision level will appear in the SpO

appear in the pulse rate display.

Electronic Tests

display, the model number “515” will

4. Verify the is flashing and the SpO

and pulse rate windows display “- - -”.

5. Set the controls on the TB500B as follows:

POWER: ON SENSOR TYPE: 87XX SIGNAL ATTENUATION: 3 SATURATION: 92

6. Plug the TB500B connector in to the Model 515B/C SpO bar begins to pulse, and that SpO

and pulse rate values appear after a few seconds.

input. Check that the pulse

Check for a plethysmogram on model 515C.

7. Check that the SpO

8. Set the SIGNAL A TTENUATION to 1, verify that the flashes and the SpO

value is 90-94, and that the pulse rate is 59-61.

and pulse

rate windows display “- - -.” An alarm should sound, and the alert bar should flash.

9. Set the SIGNAL ATTENUATION to 3, verify the alarm is silence d and th e alert bar no longer flashes. Check that the SpO

and pulse rate values reappear.

10. Press and hold the key until the illuminates (audible alert silence).

11. Verify the following SpO

values on the monitor for each of the SIGNAL ATTENU ATION

and SATURATION setting s on the TB50 0B Sensor Simula tor. Note that the pulse rate should remain stable at 50-61 beats per minute.

SAT.

SETTING

SIGNAL

ATTEN.

Monitor’s SpO

TB500A TB500B

display

100 3 98-100 98-100

92 3 90-94 90-94 82 3 82-86 80-84 72 3 75-79 70-74 62 3 67-71 60-64 62 7 N/A N/A 72 7 74-80 68-76 82 7 80-88 78-86 92 7 88-96 88-96

100 7 98-100 98-100

12. Turn off the n 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

Electronic Tests

Accuracy Test

[This page intentionally blank.]

Model 515B/C Service Manual Rev. 01

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

10.1.1 Principle of Operation

• Red/Infrared absorbtion

10.1.2

10.1.3

10.1.4

SpO2 (Oxygen Saturation)

• Range: 0-100%

• Accuracy: (for 1 standard deviation or 68% of sample distribution)

± 2% SpO unspecified for 0-79%

• Display Resolution: 1%

• Averaging: 8 seconds

• Audio: Pitch of pulse tone varies with SpO

Pulse Rate

• Range: 30-250 beats per mi nute (bpm)

• Accuracy: (1 standard deviation), ± 1% of full scale

• Display Resolution, 1 bpm

• Averaging time: 8 seconds

Sensors

• Reusable Y-Sensor™ (can be sterilized and used with all patient populations) and reusable adult finger sensor

(for 80-100% SpO2)

value

10.1.5

10.2

10.2.1 Alerts

Rev. 01 Model 515B/C Service Manual

Plethysmogram (Model 515C only)

• Pulsatile waveform

General Specifications

• Limits: Automatic and adjustable limits for SpO2 and Pulse Rate

• Audio: Adjustable volume, 2 min. silence or OFF (LED indicators)

• Visual: Flashing numerics upon violated limit(s) & red “Alert Bar” with limit (high or low) violation indicator

Specifications

General Specifications

• Messages: Sensor disconnected, sensor off patient, low signal, insufficient light, high ambient light, pulse out of range, sensor faulty, monitor faulty.

10.2.2

10.2.3

10.2.4

Display

• Numerics: 7-Segment LED’s

• Plethysmogram (Model 515C): Liquid crystal graphic module, 2.4”W X 1.3”H

Physical

• Operating Environment: 10-40 °C (50-104° F) 0-90% relative humi dity (non-condensing)

• Weight: approximately 6 lbs. (2.72 kg)

• Dimensions: Height, 3.3 inches (8.38 cm) Width, 9 inches (22.86 cm) Depth, 8 inches (20.32 cm)

Electrical

• Power: 100-120/220-240 VAC ± 10%, 50-60 Hz, 30VA

• Fuse Rating: 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 chargin g, battery operation, low battery, and extremely low battery.

Model 515B/C Service Manual Rev. 01

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. (use with OxySnap sensors) 8898 OxySnap Long Extension Cable, 12 ft. (use with OxySnap sensors) 8894-00 OxySnap Connector Strap (25 per box) 4941 Saturation Sensor Extension Cable, 4 feet (use with non 4942 Saturation Sensor Extension Cable, 6 feet (use with non-OxySnap sensors) 4943 Saturation Sensor Extension Cable, 10 feet (use with non 5266 Saturation Sensor Extension Cable, 25 feet (use with non 8776 SuperBright™ Finger Sensor 8791 SuperBright™ Y-Sensor 8789 Special use SuperBright™ Finger Sensor (8 inch sensor cable) 5238 Special Use SuperBright™ Finger Sensor & 25 ft. shielded cable

OxySnap

Select an OxySnap Finger Sensor or Y-Sensor Management Plan for each SuperBright™ Pulse Oximeter. The plan you select determines the warranty period - 12, 24 or 36 months. How the plans work: Included in each plan are TWO sensors - one for immediate use, the other one for backup. If a sensor becomes inoperative, place the backup sensor into use and return the inoperative sensor in the convenient prepaid mailer. A replacement sensor will be shipped within two business days of receipt of the inoperative sensor. This simple return/replacement method will be used for the entire warranty period, thereby guaranteeing your costs and virtually eliminating sensor tracking hassles. Warranty: The plan warranty (no t individual sensors) is 12, 24 or 36 months. Replacement sensors provided under terms of the plan shall carry the remaining plan warranty - replacements do not extend the warranty.

8793-12 Y-12 Plan: The plan warranty is 12 months.

SENSOR MANAGEMENT PLANS

Includes 3 boxes of any Y-Strip Taping Systems

-OxySnap sensors)

Rev. 01 Model 515B/C Service Manual

Accesories

Catalog No.Description

8793-24 Y-24 Plan: The plan warranty is 24 months.

Includes 6 boxes of any Y-Strip Taping Systems

8793-36 Y-36 Plan: The plan warranty is 36 months.

Includes 9 boxes of any Y-Strip Taping Systems

8744-12 Finger-12 Plan: The plan warranty is 12 months. 8744-24 Finger-24 Plan: The plan warranty is 24 months. 8744-36 Finger-36 Plan: The plan warranty is 36 months.

Y-SENSOR APPLICATORS (tapes, wraps, earclip)

8828 20mm Wrap Style Y-Strip Taping System (100 per box)

Use on neonatal foot and hand, or on pediatric toe or finger, color coded blue.

8829 25mm Wrap Style Y-Strip Taping System (100 per box)

Use on neonatal foot and ha nd, color coded green

8831 20mm Finger Style Y-Strip Taping System (100 per box)

Use on pediatric finger or on small adult finger, color coded blue

8832 25mm Finger Style Y-Strip Taping System (100 per box)

Use on adult finger, color coded green 8836 Non-Adhesiv e Fo a m Wraps (25 per box) 6131-50 Ear Clip (Pkg of 5)

Includes 10 adhesive dots 6131-25 Ear Clip (Pkg of 25)

Includes 50 adhesive dots 8700-00 Adhesive dots (Pkg of 200)

For use with ear clip

MOUNTING SYSTEMS

140030 Wall Mount 140031 Wall Mount (less wall channel) 140032 Pivot Block Mount 140033 Transport Mount (without swivel head) 140034 Transport Mount (with swi v el 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

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

EXTENDED WARRANTY

Accesories

(Normal warranty on monitor - 1 year) 6500-81 Model 515B warranty extended an additional 1 year 6500-82 Model 515B warranty extended an additional 2 years 6550-81 Model 515C warranty extended an additional 1 year 6550-82 Model 515C warranty extended an additional 2 years

BIOMEDICAL SERVICE TRAINING & TEST KITS

5530-00 TB500B SpO2 Test Bo x 9999-96 “focus” Technical Training Seminars, Pulse Oximetry (1 day course)

Rev. 01 Model 515B/C Service Manual

Accesories

[This page intentionally blank.]

Model 515B/C Service Manual Rev. 01

Common Replacement Parts List

Parts Lists

PART NO DESCRIPTION

600026 LINE CORD, 7 1/2 FT, Hospital Grade Plug 400024 BATTERY, 12V, 1.9A mp Hour, Lead Acid 6380-27 MEMBRANE KEYPANEL, Model 515C 6375-27 MEMBR ANE 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) 515033 FUSE, 1/4A SB (for 200-240 VAC) 515084 FUSE 2A, SB, SURFACE MOUNT 515086 FUSE 1A, SURFACE MOUNT

12.1

Model 515C

6550-00 Model 515C Pulse Oximeter w/Graphics Display

This list applies to the units with the 6376-01 rear panel assembly (2532 power supply board) and the 2722 main board.

PART NO REV QPA DESCRIPTION

1003-32 1217-32 315032 4470-32 600026 6550-01 9760-32

03 1 03 1

00 1

00 1 01 1

This list applies to the units with the 6487-01 rear panel assembly (2725 power supply board) and the 2724 main board.

LINE PART NO REV QPA DESCRIPTION

0001 1003-32 0002 1217-32 0003 4470-32 0004 6550-01 0010 4042-32 0015 315032 0016 600026

03 1 03 1 00 1 03 1 00 1

1 1

LABEL, SERIAL NUMBER, 3.000 X.5000 REPAIR LABEL LABEL,”120 VAC” 10 X 20 MM BLK LET TERS

LABEL, CAUTION GROUNDING LINE CORD, AC, 7 1/2 FT, HOSP GR PLUG-BUS MAC

MAIN ASSY, LABEL, FUSE RATING, 1/2A, SLO-BLO,

LABEL, SERIAL NUMBER, 3.000 X.5000 REPAIR LABEL LABEL, CAUTION GROUNDING MAIN ASSY, MODEL 515C U L LABEL LABEL,”120 VAC ” 10 X 20 MM BLK LETTER S,YEL BA LINE CORD, AC, 7 1/2 FT, HOSP GR PLUG-BUS MAC

Rev. 01 Model 515B/C Service Manual

Parts Lists

6550-01-00 Main Assy

This list applies to the units with the 6376-01 rear panel ass embly (2532 power supply board) and the 2722 main board.

PART NO REV QPA DESCRIPTION

2722-01 286205 400024 6376-01 6380-27 6381-01 6382-01 6407-01 6408-01 9621-16 9624-16 6429-10

This list applies to the units with the 6487-01 rear panel ass embly (2725 power supply board) and the 2724 main board.

00 1

00 1 00 1 00 1 00 1 00 1 00 1 02 1 00 8 00 1

MAIN BOARD ASSY, 6-32 X 3/4 S.B.H. CAD PLATED

BATTERY, 12V, 1.9 AMP HOUR, LEAD ACID

REAR PANEL ASSY, MEMBRANE KEYPANEL, SPO2 INPUT CONNECTOR ASSEMBLY POWER HARNESS ASSY, TOP COVER ASSY, BOTTOM COVER ASSY, LENS, ALERT LED REFLECTOR BATTERY SUPPORT BRACKET

Model 515C

LINE PART NO REV QPA DESCRIPTION

0001 2724-01 0005 6487-01 0006 6380-27 0007 6381-01 0008 6382-01 0009 6407-01 0010 6408-01 0011 6429-10 0012 9621-16 0013 9624-16 0019 161095 0020 286205 0021 400024

01 1 00 1 04 1 00 1 00 1 00 1 01 1 00 1 02 1 00 8

2722-01 01 Main Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2722-03 0002 2722-04 0003 2721-17 0004 6406-01 0005 6410-07 0015 281204 0016 285012

01 0 00 0 01 1 00 1 03 1

MAIN BOARD ASSY, MODEL 515C REAR PANEL ASSY, MODEL 515B & 515C MEMBRANE KEYPANEL, MODEL 515C CABLE ASSY, SPO2 INPUT, MODEL 515B & 515C POWER HARNESS ASSY, MODEL 515B & 515C TOP COVER ASSY, MODEL 515B & 515C BOTTOM COVER ASSY, MODEL 515B & 515C BRACKET, BATT E RY SUPPORT, MODEL 515B & 515C LENS, ALERT, MODEL 515 LED REFLECTOR, MODEL 515

0 0 1

TAPE, FOAM, 1.5W X.062T X 50FT L, BLK, PR SE 6-32 X 3/4 S.B.H. CAD PLATED BATTERY, 12V DC, 2.3 AMP HOUR, LEAD ACID

SCHEMATIC, MAIN BOARD, MODEL 515C TEST PROCEDURE, MAIN BOARD, MODEL 515C MAIN BOARD SUBASSY, MODEL 515B & 515C GRAPHICS DISPLAY ASSY, MODEL 515C PROGRAM, EPROM ASSY, SPO2, 515B & 515C SCREW, 2-56 X 3/16 L, PHILLIPS, STEEL, NICKEL

LOCK WASHER, NO. 2, INTERNAL TOOTH, STEEL, CA

2721-17 01 Main Board Subassy

PART NO QPA DESCRIPTION 130014

Model 515B/C Service Manual Rev. 01

SPEAKER, 550 HZ,.5W, 2 IN. DIA, PC MOUNT

Model 515C

PART NO QPA DESCRIPTION 152066 152070 152086 153058 154062 154065 154072 154074 154079 154080 154082 154084 154085 154093 154094 180011 180019 180021 180022 180029 180030 211414 211634 211721 211914 212534 212609 215059 215074 215075 215076 215077 230023 280222 470011 472198 472200 472274 474136 474138 474144 474145 474148 474149 474153 474157 474160 474165 474166 474172 474175 474178

CAPACITOR, 220UF, 63V, RADIAL, ELECTROLYTIC

CAPACITOR, 1000UF, 10V, 20%, ELCT LT, RADIAL,

CAPACITOR, 1000UF, 16V, 20%, AL, ELCTLYTC,.2

CAPACITOR, 4700PF, 50V, 10%, X7R, CERAMI C, S

CAPACITOR,.01UF, 50V, 10%, X7R, SURFACE MOUN

CAP,.1UF, 63V, .2 (5M M) SP, POLYESTER FILM

CAPACITOR,.1UF, 50V, 10%, X7R, CER CHIP, S M

CAPACITOR, 1.5UF, 25VDC, 10%, TANT, SURFACE M

CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE

CAPACITOR, 47UF, 10VDC, 10%, TANTALUM, SURFAC

CAPACITOR, 22PF, 100V, 10%, NPO, MLTILYR CERA

CAPACITOR, 2700PF, 100V, 10%, X7R, MLTILYR CE

CAPACITOR, 47PF, 100VDC, 5%, MLTILYR CER, SUR

CAPACITOR, 68UF, 16VDC, 10%, TANTALUM, SURF M

CAPACITOR, 47UF, 20VDC, 20%, TANTALUM, SURF M

FERRITE BEAD, 22 AWG TCW WIRE THRU CORE, 1 TU

INDUCTOR, 100UH, 10%, SURFACE MOUNT

INDUCTOR, 20UH PARALLEL/80UH SERIES, SURFACE

INDUCTOR, 10UH, 10%, SURFACE MOUNT

INDUCTOR, 50MHZ CUT-OFF FREQUENCY, SURFACE MO

INDUCTOR-CAP, 4700PF, 50VDC, 2A, 3 TERM, SURF

CONNECTOR, 4 PIN, PLUG, FRICTION LOCK, PC MOU

CONNECTOR, 6 PIN, HEADER, DUAL ROW,.100 SP,

CONNECTOR, 7 PIN, HEADER,.079 SPACI NG , PC MO

CONNECTOR, 9 PIN, HEADER, SIL,.100 SP, STRAI

CONNECTOR, 20 PIN, RECEPTACLE, SIL,.100 SP,

CONNECTOR, 24 PIN, HEADER,.100 SPACI NG , PC M

SOCKET, 32 PIN, LOW PROFILE,.6 SPACING

SOCKET, 4 PIN, SINGLE-I N-LI NE, .100 SP, PC MO

SOCKET, 5 PIN, SINGLE-I N-LI NE, .100 SP, PC MO

SOCKET, 10 PIN, SINGLE-I N-LI NE, .10 0 SP, PC M

SOCKET, 15 PIN, SINGLE-I N-LI NE, .10 0 SP, PC M

CRYSTAL, 12.288 MHZ, HC49S CASE

SPACER, LED, FOR 3 LEADS,.25 DIA X.31 L, BL

RESISTOR, 8.2 OHM, 1/4W, 10%, CARBON

RESISTOR, 3.3 OHM, 1/4W, 1%, CARBON

RESISTOR, 5.6 OHM, 1/4W, 1%

RESISTOR, 26.7 OHM, 1/4W, 1%

RESISTOR, 1K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 100 OHM, 1/8W, 1%, SURFAC E MOUNT

RESISTOR, 20.5K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 215 OHM, 1/8W, 1%, SURFAC E MOUNT

RESISTOR, 2.05K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 33.2K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 42.2K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 511 OHM, 1/8W, 1%, SURFAC E MOUNT

RESISTOR, 5.11K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 10 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 825 OHM, 1/8W, 1%, SURFAC E MOUNT

Parts Lists

Rev. 01 Model 515B/C Service Manual

Parts Lists

PART NO QPA DESCRIPTION 474182 474185 474186 474209 474210 474211 475045 481546 481547 481549 481552 482586 482587 482588 482589 482590 482591 482592 482593 482594 482596 483018 484060 484541 484553 484554 484557 485532 485540 485546 485547 486041 486306 486319 486320 486321 486323 486324 486329 486332 486333 486334 486342 486790 486794 486795 486812 487084 487098 487114 515074 515083

RESISTOR, 150K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 150 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 15K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 2.67K OHM, 1/8W, 1%, 1206 STYLE, S

RESISTOR, 56.2K OHM, 1/8W, 1%, 1206 STYLE, S

RESISTOR, 49.9K OHM, 1/8W, 1%, 1206 STYLE, S

E2 POTENTIOMETER, 10K OHM, 20%, SURFACE MOUNT

DIODE, MMBD914L, SWITCHING , SURFACE MOUNT

DIODE, BAT 54, HOT CARRIER SCHOTTKY, SURFACE M

DIODE, MBRS140T3, RECTIFIER, SURFACE MOUNT

DIODE, MBRS340T3, SCHOTTKY, 40V, 3A, SURFACE

LED LIGHT BAR, YELLOW,.36 X.35

LED LIGHT BAR, RED,.35 X.35

LED BAR GRAPH, 10 ELEMENT, RED, 1 X.400

LED 7 SEGMENT DISPLAY, 10MM, BLACK SURFACE, R

LED 7 SEGMENT DISPLAY, 14.2MM, BLACK SURFACE,

LED, YELLOW,.100 SPACING

LED, GREEN,.100 LEAD SPACING

LED, RED,.100 SPACI NG

LED, BICOLOR, RED & GREEN, 3 LEAD,.100 SPACI

LED, HLMP-C100, RED,.100 SPACING, PC MOUNT

TRANSISTOR, MMBT3906T, PNP, SURFACE MOUNT

TRANSISTOR, MMBT3904T, NPN, SURFACE MOUNT

VOLTAGE REGULATOR, LM317LD, +1.2V - +37V OUT,

IC, TL5001CD, PULSE WIDT H MOD CONT, 8 PIN, S

VOLTAGE REGULATOR, LT1054CS8, SW CAP, 8 PIN,

VOLTAGE REGULATOR, LT1117CST-5, POS, 3 PIN, S

TRANSISTOR, 2N7002T1, N-CHAN ENHAN MODE, SURF

TRANSISTOR, SI9955DY, M O SFET, DUAL, N-CH ENH,

TRANSISTOR, VN0605T, N-CHAN ENHANCEMENT MODE ,

TRANSISTOR, TPS1101D, P -CH ENHA N MODE MO SFE T,

IC, MAX7219CWG, DISPLAY DRIVER, 8 DIGIT, 24 P

IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS

IC, MC14020BD, 14-BI T BINARY COUNTER, SURF MO

IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF

IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF

IC, SN74HC573DW, OCTA L D -TY PE LATCH W 3-ST OU

IC, DG444DY, QUAD SPST CMOS ANALOG SW, SURF M

IC, SN74HC32D, QUAD 2-IN. POS OR GATE, SURF M

IC, AD7703BR, 20-BIT A TO D CONVERTER, SURFAC

IC, HD64180RCP-6X, 8-BIT MPU, HI INT, 68 PIN

IC, MC14051BD, 8-CH ANAL OG MUX /DE MUX, 16 PIN,

IC, PCD3311CTDS, MUSICAL-TONE GEN, 16 PIN, S

IC, TLE2022CD, DUAL OP AMPLIFIER, H SPEED, LO

IC, PM7524FS, 8-BIT D TO A CONV, 16 PIN, SURF

IC, TLC549ID, 8-BIT A TO D CONV, SERIAL CONTR

IC, AD780AR, 2.5 VOLTAGE REFERENCE, 8 PIN, S

IC, OP-282GS, DUAL JFET OP AMP, L PWR, H SPD,

IC, MAX705CSA, UPROCESSOR SPRVISORY CKT, S MN

IC, MC34119D, AUDIO AMPLIFIER, L PWR, 8 PIN,

FUSE, PIGTAIL, 1/16A, 125V, V FAST-ACTING, 1.

FUSE W FUSEHOLDER, 1A, 125V, V FAST-ACTING, S

Model 515C

Model 515B/C Service Manual Rev. 01

Model 515B

PART NO QPA DESCRIPTION 515085 2721-02 5965-07 5966-07

FUSE W FUSEHOLDER, 2A, 125V, SLO-BLO, SUBMIN,

FAB, MAIN BOARD, MODEL 515B AND 515C

PROGRAM, PEEL ASSY, CSIO CONTROLLER, MODEL 51

PROGRAM, PEEL ASSY, TIMING SEQUE NCER , MODEL 5

2724-01 01 Main Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2723-17 0002 2724-03 0003 2724-04 0004 6410-07 0015 280029 0016 281204 0017 285012 0018 482597

01 1 01 0 00 0 03 1

MAIN BOARD SUBASSY, MODEL 515B & 515C SCHEMATIC, MAIN BOARD, MODEL 515C TEST PROCEDURE, MAIN BOARD, MODEL 515C PROGRAM, EPROM ASSY, SPO2, 515B & 515C

0 0 0 1

SPACER # 2-56 THREADED, 3/16 OD X 3/8 LG SCREW, 2-56 X 3/16 L, PHILLIPS, STEEL, NICKEL LOCK WASHER, NO. 2, INTERNAL TOOTH, STEEL, CA LCD DISPLAY, WITH LED BACKLIGHT AND CONNECTOR

Parts Lists

12.2

Model 515B

6500-00-00 Model 51 5B Pulse Oximeter

This list applies to the units with the 6376-01 rear panel assembly (2532 power supply board) and the 2721 main board.

PART NO REV QPA DESCRIPTION 1003-32 1217-32 315032 4470-32 600026 6500-01 9760-32

03 1 03 1

00 1

00 1 01 1

This list applies to the units with the 6487-01 rear panel assembly (2725 power supply board) and the 2724 main board.

LINE PART NO REV QPA DESCRIPTION 0001 1003-32 0002 1217-32 0003 4470-32 0004 6500-01 0010 4042-32 0015 315032 0016 600026

03 1 03 1 00 1 03 1 00 1

1 1

LABEL, SERIAL NUMBER, 3.000 X.5000 REPAIR LABEL LABEL,”120 VAC ” 10 X 20 MM BLK LETTER S

LABEL, CAUTION GROUNDING LINE CORD, AC, 7 1/2 FT, HOSP GR PLUG-BUS MAC

MAIN ASSY, LABEL, FUSE RATING, 1/2A, SLO-BLO,

LABEL, SERIAL NUMBER, 3.000 X.5000 REPAIR LABEL LABEL, CAUTION GROUNDING MAIN ASSY, MODEL 515B U L LABEL LABEL,”120 VAC ” 10 X 20 MM BLK LETTER S,YEL BA LINE CORD, AC, 7 1/2 FT, HOSP GR PLUG-BUS MAC

Rev. 01 Model 515B/C Service Manual

Parts Lists

6500-01-00 Main Assy

This list applies to the units with the 6376-01 rear panel ass embly (2532 power supply board) and the 2721 main board.

PART NO REV QPA DESCRIPTION

2721-01 286205 400024 6375-27 6376-01 6381-01 6382-01 6407-01 6408-01 9621-16 9624-16 6429-10

This list applies to the units with the 6487-01 rear panel ass embly (2725 power supply board) and the 2723 main board.

00 1

00 1 00 1 00 1 00 1 00 1 00 1 02 1 00 8 00 1

MAIN BOARD ASSY, 6-32 X 3/4 S.B.H. CAD PLATED

BATTERY, 12V, 1.9 AMP HOUR, LEAD ACID

MEMBRANE KEYPANEL, REAR PANEL ASSY, SPO2 INPUT CONNECTOR ASSEMBLY POWER HARNESS ASSY, TOP COVER ASSY, BOTTOM COVER ASSY, LENS, ALERT LED REFLECTOR BATTERY SUPPORT BRACKET

Model 515B

LINE PART NO REV QPA DESCRIPTION

0001 2723-01 0005 6487-01 0006 6375-27 0007 6381-01 0008 6382-01 0009 6407-01 0010 6408-01 0011 6429-10 0012 9621-16 0013 9624-16 0019 161095 0020 286205 0021 400024

01 1 00 1 04 1 00 1 00 1 00 1 01 1 00 1 02 1 00 8

0 0 1

2721-01 01 Main Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2721-03 0002 2721-04 0003 2721-17 0004 6410-07

01 0 00 0 01 1 03 1

2721-17-00 Main Board Subassy

MAIN BOARD ASSY, MODEL 515B REAR PANEL ASSY, MODEL 515B & 515C MEMBRANE KEYPANEL, MODEL 515B CABLE ASSY, SPO2 INPUT, MODEL 515B & 515C POWER HARNESS ASSY, MODEL 515B & 515C TOP COVER ASSY, MODEL 515B & 515C BOTTOM COVER ASSY, MODEL 515B & 515C BRACKET, BATT E RY SUPPORT, MODEL 515B & 515C LENS, ALERT, MODEL 515 LED REFLECTOR, MODEL 515 TAPE, FOAM, 1.5W X.062T X 50FT L, BLK, PR SE 6-32 X 3/4 S.B.H. CAD PLATED BATTERY, 12V DC, 2.3 AMP HOUR, LEAD ACID

SCHEMATIC, MAIN BOARD, MODEL 515B TEST PROCEDURE, MAIN BOARD, MODEL 515B MAIN BOARD SUBASSY, MODEL 515B & 515C PROGRAM, EPROM ASSY, SPO2, 515B & 515C

PART NO REV QPA DESCRIPTION 130014 152066 152070 152086

Model 515B/C Service Manual Rev. 01

1 1 1 1

SPEAKER, 550 HZ,.5W, 2 IN. DIA, PC MOUNT CAPACITOR, 220UF, 63V, RADIAL, ELECTROLYTIC CAPACITOR, 1000UF, 10V, 20%, ELCTLT, RADIAL, CAPACITOR, 1000UF, 16V, 20%, AL, ELCTLYT C,.2

Model 515B

PART NO REV QPA DESCRIPTION 153058 154062 154065 154072 154074 154079 154080 154082 154084 154085 154093 154094 180011 180019 180021 180022 180029 180030 211414 211634 211721 211914 212609 215059 215074 215075 215076 215077 230023 280222 472198 472200 472274 474136 474138 474144 474145 474148 474149 474153 474157 474160 474165 474166 474172 474175 474178 474182 474185 474186 474209 474210

1 3 3

4 3 2 1 2 5 4 1 1 1 2 2 1 1 1 1 1 1 1 4 6 2 2 1 8 1 1 1 3

6 6 2 2

2 1

3 1 1 1 4 4 1

CAPACITOR, 4700PF, 50V, 10%, X7R, CERAM IC, S CAPACITOR,.01UF, 50V, 10%, X7R, SURFACE MOUN CAP,.1UF, 63V,.2 (5 MM) SP, POLYESTER FILM CAPACITOR,.1UF, 50V, 10%, X7R, CER CHIP, S M

CAPACITOR, 1.5UF, 25VDC, 10%, TANT, SURFACE M

CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE CAPACITOR, 47UF, 10VDC, 10%, TANTALUM, SURFAC CAPACITOR, 22PF, 100V, 10% , NPO, MLTI LYR CERA CAPACITOR, 2700PF, 100V, 10%, X7R, MLTILYR CE CAPACITOR, 47PF, 100VDC, 5%, MLTILYR CER, SUR CAPACITOR, 68UF, 16VDC, 10%, TANTALUM, SURF M CAPACITOR, 47UF, 20VDC, 20%, TANTALUM, SURF M FERRITE BEAD, 22 AWG TCW WIRE THRU CORE, 1 TU INDUCTOR, 100UH, 10%, SURFACE MOUNT INDUCTOR, 20UH PARALLEL/80UH SERIES, SURFACE INDUCTOR, 10UH, 10%, SURFACE MOUNT INDUCTOR, 50MHZ CUT-OFF FREQUENCY, S URFACE MO INDUCTOR-CAP, 4700PF, 50VDC, 2A, 3 TERM, SURF CONNECTOR, 4 PIN, PLUG, FRICTION LOCK, PC MOU CONNECTOR, 6 PIN, HEADER, DUAL ROW,.100 SP, CONNECTOR, 7 PIN, HEADER,.079 SPACING, PC MO CONNECTOR, 9 PIN, HEADER, SIL,.100 SP, STRAI CONNECTOR, 24 PIN, HEADER,.100 SPACING, PC M SOCKET, 32 PIN, LOW PROFILE,.6 SPACING SOCKET, 4 PIN, SINGLE-IN-LINE,.100 SP, PC MO SOCKET, 5 PIN, SINGLE-IN-LINE,.100 SP, PC MO SOCKET, 10 PIN, SINGLE-IN-LINE,.100 SP, PC M SOCKET, 15 PIN, SINGLE-IN-LINE,.100 SP, PC M CRYSTAL, 12.288 MHZ, HC49S CASE SPACER, LED, FOR 3 LEADS,.25 DIA X.31 L, BL RESISTOR, 3.3 OHM, 1/4W, 1%, CARBON RESISTOR, 5.6 OHM, 1/4W, 1% RESISTOR, 26.7 OHM, 1/4W, 1% RESISTOR, 1K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 20.5K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 215 OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 2.05K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 33.2K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 42.2K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 511 OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 5.11K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 10 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 825 OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 150K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 150 OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 15K OHM, 1/8W, 1%, SURFACE MOUNT RESISTOR, 2.67K OHM, 1/8W, 1%, 1206 STYLE, S RESISTOR, 56.2K OHM, 1/8W, 1%, 1206 STYLE, S

Parts Lists

Rev. 01 Model 515B/C Service Manual

Parts Lists

PART NO REV QPA DESCRIPTION 474211 475045 481546 481547 481549 481552 482565 482586 482587 482588 482589 482590 482591 482592 482593 482594 483018 484060 484541 484553 484554 484557 485532 485540 485546 485547 486041 486306 486319 486320 486321 486323 486324 486329 486332 486333 486334 486342 486790 486794 486795 486812 487084 487098 487114 515074 515083 515085 2721-02 5965-07 5966-07

1 1

2 1 1 4 1 1 1 3 3 2 1 4 1 1 1 1 1 1 1 8 1 2 2 1 1 1 1 1 3 1 2 2 1 1 1 1 1 1 1 3 1 1 1 1

1 00 1 01 1 01 1

RESISTOR, 49.9K OHM, 1/8W, 1%, 1206 STYLE, S E2 POTENTIOMETER, 10K OHM, 20%, SURFACE MOUNT DIODE, MMBD914L, SWITCHING, SURFACE MOUNT

DIODE, MMBD301L, HOT CARRIER SCHOTTKY, SURF M DIODE, MBRS140T3, RECTIFIER, SURFACE MOUNT DIODE, MBRS340T3, SCHOTTKY, 40V, 3A, SURFACE LED, CLEAR, ROUN D LED LIGHT BAR, YELLOW, .36 X.35 LED LIGHT BAR, RED,.35 X.35 LED BAR GRAPH, 10 ELEMENT, RED, 1 X.400 LED 7 SEGMENT DISPLAY, 10MM, BLACK SURFACE, R LED 7 SEGMENT DISPLAY, 14.2MM, BLACK SURFACE, LED, YELLOW,.100 SPACING LED, GREEN,.100 LEAD SPACING LED, RED,.100 SPACING LED, BICOLOR, RED & GREEN, 3 LEAD,.100 SPACI TRANSISTOR, MMBT3906T, PNP, SURFACE MOUNT TRANSISTOR, MMBT3904T, NPN, SURFACE MOUNT VOLTAGE REGULATOR, LM317LD, +1.2V - +37V O UT, IC, TL5001CD, PULSE WIDTH MO D CONT, 8 PIN, S VOLTAGE REGULATOR, LT1054CS8, SW CAP, 8 PIN, VOLTAGE REGULATOR, LT1117CST-5, POS, 3 PIN, S TRANSISTOR, 2N7002T1, N-CHAN ENHAN MODE, SURF TRANSISTOR, SI9955DY, MOSFET, DUAL, N-CH ENH, TRANSISTOR, VN0605T , N-CHAN ENHANCEMENT MODE, TRANSISTOR, TPS1101D, P-CH ENHAN MODE MOSFET, IC, MAX7219CWG, DISPLAY DRI VE R, 8 DIGIT, 24 P IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS IC, MC14020BD, 14-BIT BINARY COUNTER, SURF MO IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF IC, SN74HC573DW, OCTAL D-TYPE LATCH W 3-ST OU IC, DG444DY, QUAD SPST CMOS ANALOG SW, SURF M IC, SN74HC32D, QUAD 2-IN. POS OR GATE, SURF M IC, AD7703BR, 20-BIT A TO D CONVERTER, SURFAC IC, HD64180RCP-6X, 8-BIT MPU, HI INT, 68 PIN IC, MC14051BD, 8-CH ANALO G MUX/DEM UX, 16 PIN, IC, PCD3311CTDS, MUSICAL-TONE GEN, 16 PIN, S IC, TLE2022CD, DUAL HIGH SPEED LO PWR OP AMPL IC, PM7524FS, 8-BIT D TO A CONV, 16 PIN, SURF IC, TLC549ID, 8-BIT A TO D CONV, SERIA L CONT R IC, AD780AR, 2.5 VOLTAGE REFERENCE, 8 PIN, S IC, OP-282GS, DUAL JFET OP AMP, L PWR, H SPD, IC, MAX705CSA, UPROCESSOR SPRVISORY CKT, S MN IC, MC34119D, AUDIO AMPLIFIER, L PWR, 8 PIN, FUSE, 1/16A, 125V, VE RY FAST-ACTING, SUBMIN, FUSE WITH FUSEHOLDER, 1A, 125V, SURFACE MOUNT FUSE WITH FUSEHOLDER, 2A, 125V, SLO-BLO, SURF FAB, MAI N BOARD, PROGRAM, PEEL ASSY, CSIO CONTROLLER, 51 PROGRAM, PEEL ASSY, T IM ING SEQUENCER, 5

Model 515B

Model 515B/C Service Manual Rev. 01

Model 515B

2723-01 01 Main Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2723-03 0002 2723-04 0003 2723-17 0004 6410-07

01 0 00 0 01 1 03 1

2723-17 01 Main Board Subassy

PART NO QPA DESCRIPTION

130014 152066 152070 152084 152086 153058 154062 154065 154072 154074 154079 154080 154082 154084 154085 154093 154095 180011 180019 180021 180022 180029 180030 211414 211634 211721 211914 212534 212609 215059 215074 215075 215076 215077 230023 2723-02 280222 472198 472200 472274 474136

SPEAKER, 550 HZ,.5W, 2 IN. DIA, PC MOUNT

CAPACITOR, 220UF, 63V, RADIAL, ELECTROLYTIC

CAPACITOR, 1000UF, 10V, 20%, ELCT LT, RADIAL,

CAPACITOR, 470UF, 25V, 20%, AL, ELCTLYTC,.2

CAPACITOR, 1000UF, 16V, 20%, AL, ELCTLYTC,.2

CAPACITOR, 4700PF, 50V, 10%, X7R, CERAMI C, S

CAPACITOR,.01UF, 50V, 10%, X7R, SURFACE MOUN

CAP,.1UF, 63V, .2 (5M M) SP, POLYESTER FILM

CAPACITOR,.1UF, 50V, 10%, X7R, CER CHIP, S M

CAPACITOR, 1.5UF, 25VDC, 10%, TANT, SURFACE M

CAPACITOR, 10UF, 16V, 10%, TANTALUM, SURFACE

CAPACITOR, 47UF, 10VDC, 10%, TANTALUM, SURFAC

CAPACITOR, 22PF, 100V, 10%, NPO, MLTILYR CERA

CAPACITOR, 2700PF, 100V, 10%, X7R, MLTILYR CE

CAPACITOR, 47PF, 100VDC, 5%, MLTILYR CER, SUR

CAPACITOR, 68UF, 16VDC, 10%, TANTALUM, SURF M

CAPACITOR, 22UF, 20VDC, 10%, TANTALUM, SURF M

FERRITE BEAD, 22 AWG TCW WIRE THRU CORE, 1 TU

INDUCTOR, 100UH, 10%, SURFACE MOUNT

INDUCTOR, 20UH PARALLEL/80UH SERIES, SURFACE

INDUCTOR, 10UH, 10%, SURFACE MOUNT

INDUCTOR, 50MHZ CUT-OFF FREQUENCY, SURFACE MO

INDUCTOR-CAP, 4700PF, 50VDC, 2A, 3 TERM, SURF

CONNECTOR, 4 PIN, PLUG, FRICTION LOCK, PC MOU

CONNECTOR, 6 PIN, HEADER, DUAL ROW,.100 SP,

CONNECTOR, 7 PIN, HEADER,.079 SPACI NG , PC MO

CONNECTOR, 9 PIN, HEADER, SIL,.100 SP, STRAI

CONNECTOR, 20 PIN, RECEPTACLE, SIL,.100 SP,

CONNECTOR, 24 PIN, HEADER,.100 SPACI NG , PC M

SOCKET, 32 PIN, LOW PROFILE,.6 SPACING

SOCKET, 4 PIN, SINGLE-I N-LI NE, .100 SP, PC MO

SOCKET, 5 PIN, SINGLE-I N-LI NE, .100 SP, PC MO

SOCKET, 10 PIN, SINGLE-I N-LI NE, .10 0 SP, PC M

SOCKET, 15 PIN, SINGLE-I N-LI NE, .10 0 SP, PC M

CRYSTAL, 12.288 MHZ, HC49S CASE

FAB, MAIN BOARD, MODEL 515B & 515C

00 1

SPACER, LED, FOR 3 LEADS,.25 DIA X.31 L, BL

RESISTOR, 3.3 OHM, 1/4W, 1%, CARBON

RESISTOR, 5.6 OHM, 1/4W, 1%

RESISTOR, 26.7 OHM, 1/4W, 1%

RESISTOR, 1K OHM, 1/8W, 1%, SURFACE MOUNT

Parts Lists

SCHEMATIC, MAIN BOARD, MODEL 515B TEST PROCEDURE, MAIN BOARD, MODEL 515B MAIN BOARD SUBASSY, MODEL 515B & 515C PROGRAM, EPROM ASSY, SPO2, 515B & 515C

Rev. 01 Model 515B/C Service Manual

Parts Lists

PART NO QPA DESCRIPTION 474138 474144 474145 474147 474148 474149 474153 474157 474160 474165 474166 474170 474172 474175 474178 474182 474185 474186 474209 474210 474211 475045 481546 481547 481549 481552 482586 482587 482588 482589 482590 482591 482592 482593 482594 482596 483018 484060 484541 484553 484554 484557 485532 485540 485546 485547 486041 486306 486319 486320 486321 486323

RESISTOR, 100 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 20.5K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 215 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 24.9K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 2.05K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 33.2K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 42.2K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 511 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 5.11K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 301K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 10 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 3.92K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 825 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 150K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 150 OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 15K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 2.67K OHM, 1/8W, 1%, 1206 STYLE, S

RESISTOR, 56.2K OHM, 1/8W, 1%, 1206 STYLE, S

RESISTOR, 49.9K OHM, 1/8W, 1%, 1206 STYLE, S

E2 POTENTIOMETER, 10K OHM, 20%, SURFACE MOUNT

DIODE, MMBD914L, SWITCHING , SURFACE MOUNT

DIODE, BAT 54, HOT CARRIER SCHOTTKY, SURFACE M

DIODE, MBRS140T3, RECTIFIER, SURFACE MOUNT

DIODE, MBRS340T3, SCHOTTKY, 40V, 3A, SURFACE

LED LIGHT BAR, YELLOW,.36 X.35

LED LIGHT BAR, RED,.35 X.35

LED BAR GRAPH, 10 ELEMENT, RED, 1 X.400

LED 7 SEGMENT DISPLAY, 10MM, BLACK SURFACE, R

LED 7 SEGMENT DISPLAY, 14.2MM, BLACK SURFACE,

LED, YELLOW,.100 SPACING

LED, GREEN,.100 LEAD SPACING

LED, RED,.100 SPACI NG

LED, BICOLOR, RED & GREEN, 3 LEAD,.100 SPACI

LED, HLMP-C100, RED,.100 SPACING, PC MOUNT

TRANSISTOR, MMBT3906T, PNP, SURFACE MOUNT

TRANSISTOR, MMBT3904T, NPN, SURFACE MOUNT

VOLTAGE REGULATOR, LM317LD, +1.2V - +37V OUT,

IC, TL5001CD, PULSE WIDT H MOD CONT, 8 PIN, S

VOLTAGE REGULATOR, LT1054CS8, SW CAP, 8 PIN,

VOLTAGE REGULATOR, LT1117CST-5, POS, 3 PIN, S

TRANSISTOR, 2N7002T1, N-CHAN ENHAN MODE, SURF

TRANSISTOR, SI9955DY, M O SFET, DUAL, N-CH ENH,

TRANSISTOR, VN0605T, N-CHAN ENHANCEMENT MODE ,

TRANSISTOR, TPS1101D, P -CH ENHA N MODE MO SFE T,

IC, MAX7219CWG, DISPLAY DRIVER, 8 DIGIT, 24 P

IC, MCM60L256AF10, 32K X 8 CMOS SRAM, 100NS

IC, MC14020BD, 14-BI T BINARY COUNTER, SURF MO

IC, SN74HC14D, HEX SCHMITT-TRIGGER INV, SURF

IC, SN74HC138D, 3-LINE TO 8-LINE DECDR, SURF

IC, SN74HC573DW, OCTA L D -TY PE LATCH W 3-ST OU

Model 515B

Model 515B/C Service Manual Rev. 01

Common Assemblies to both Models 515B & 515C

PART NO QPA DESCRIPTION 486324 486329 486332 486333 486334 486342 486790 486794 486795 486812 486814 487084 487098 487114 515074 515083 515085 5965-07 5966-07

IC, DG444DY, QUAD SPST CMOS ANALOG SW, SURF M

IC, SN74HC32D, QUAD 2-IN. POS OR GATE, SURF M

IC, AD7703BR, 20-BIT A TO D CONVERTE R, SURFAC

IC, HD64180RCP-6X, 8-BIT MPU, HI INT, 68 PIN

IC, MC14051BD, 8-CH ANALOG MUX/DE MUX , 16 PIN,

IC, PCD3311CTDS, MUSICAL-TONE GEN, 16 PIN, S

IC, TLE2022CD, DUAL OP AMPLIFIER, H SPEED, LO

IC, PM7524FS, 8-BIT D TO A CONV, 16 PIN, SURF

IC, TLC549ID, 8-BIT A TO D CONV, SERIAL CO NT R

IC, AD780AR, 2.5 VOLTAGE REFERENCE, 8 PIN, S

IC, AD820AR, FET INPUT OP AMP, SURF MNT, 8 PI

IC, OP-282GS, DUAL JFET OP AMP, L PWR, H SPD,

IC, MAX705CSA, UPROCESSOR SPRVISORY CKT, S MN

IC, MC34119D, AUDIO AMPLIFIER, L PWR, 8 PIN,

FUSE, PIGTAIL, 1/16A, 125V, V FAST-ACTING, 1.

FUSE W FUSEHOLDER, 1A, 125V, V FAST-ACTING, S

FUSE W FUSEHOLDER, 2A, 125V, SLO-BLO, SUBMIN,

PROGRAM, PEEL ASSY, CSIO CONTROLLER, MODEL 51

PROGRAM, PEEL ASSY, TIMING SEQUE NCER , MODEL 5

Parts Lists

12.3

Common Assemblies to both Models 515B & 515C

6376-01-00 Rear Panel Assy

LINE PART NO REV QPA DESCRIPTION 0001 2532-01 0002 5743-10 0003 5812-10 0004 5819-01 0005 6376-10 0006 6376-32 0011 161008 0012 216059 0013 280188 0014 281500 0015 281501 0016 285000 0017 285001 0018 285046 0019 286219 0020 515023

00 1 01 1 00 2 02 1 00 1 01 1

0 1 0 0 0 0 0 0 0 2

POWER SUPPLY BOARD ASSY, POWER ENTRY MODULE, SPACER, SUPPORT GROUND WIRE ASSY, 3 1/2 IN. L PANEL, REAR, FACEPLATE, REAR PANEL, ADHESIVE, 242, THREADLOCKE R, ME D STR , BLUE, 1 CONNECTOR, PLUG, POTENTIAL COMPENSATION STANDOFF, 3/8 DIA X 3/8 L, 6-32 THD THRU, ALU NUT, HEX, NO. 4-40, STEEL, CADMIUM PLATE NUT, HEX, NO. 6-32, STEEL, CADMIUM PLATE LOCK WASHER, NO. 4, INTERNAL TOOTH, STEEL, CA LOCK WASHER, NO. 6, INTERNAL TOOTH, STEEL, CA WASHER, FLAT, NO. 6 SAE, 3/ 8 OD X 5/32 ID X 5 SCREW, 6-32 X 1 1/4 (31.8) L, PAN HD, PHILLIP 1/2A 250V SLO-BLO (IEC127-111 5X20)

6381-01-00 SpO2 Input Connector Assembly

LINE PART NO REV QPA DESCRIPTION 0001 5606-16 0002 5642-10 0003 8884-10 0006 161007 0007 211704 0008 211719

00 1 00 0 02 1

0 1 1

DRESS BEZEL, SAO2 INPUT WIRE, 28AWG, ORANGE, CS95 ALLOY, FEP INSULATI CABLE, 30AWG, 3 SINGLE & 1 TW SHLD PR, POLYUR ADHESIVE, 414, HIGH STRENG TH, COLO R: CLEAR CONNECTOR, RCPT, 7 PIN, PNL MOUNT, W ITH HARDW CONNECTOR, 7 PIN, RECEPTACLE, 28AWG THRU 26AW

Rev. 01 Model 515B/C Service Manual

Parts Lists

LINE PART NO REV QPA DESCRIPTION 0009 280108 0010 608003 0011 608005

2 0 0

6382-01-00 Power Harness Assy

LINE PART NO REV QPA DESCRIPTION 0001 211215 0002 211413 0003 216051 0004 605154 0005 605156 0006 608001

1 0 2 0 0 0

6407-01-00 Top Cover Assy

LINE PART NO REV QPA DESCRIPTION 0001 5765-16

0002 6427-32 0003 5828-32 0004 5854-10 0005 6409-32

00 1 00 1 00 1 00 1 00 1

Common Assemblies to both Models 515B & 515C

SNAP RIVET TUBING, HEAT SHRINK, 1/8 (3.2) DIA, BLACK TUBING, HEAT SHRINK, 1/16 (1.6) DIA, BLACK

CONNECTOR, 2 PIN HOUSING, CLOSED END CONNECTOR, 4 PIN, RECEPTACLE, 22AWG TERMINAL, RECEPTACLE, INSUL,.187, 22-18AWG, #22 7/30 TC HOOKUP WIRE, 300V, RED #22 7/30 TC HOOKUP WIRE, 300V, BLACK CABLE TIE,.094 X 3.62L, SELF-LKG, 1/1 6 TO 5/

TOP COVER, WHITE LABEL, WARNING, EXPLOSION HAZARD, LABEL, ISOLATION BATTERY SUPPORT, LABEL, INSTRUCTIONS, TOP COVER,

6408-01 01 Bottom Cover Assy

LINE PART NO REV QPA DESCRIPTION 0001 5405-10 0002 5409-32 0003 5766-16 0004 6473-10 0009 161064 0010 240056

00 1 00 1 01 1 00 1

0 4

2532-01-00 Power Supply Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2472-02 0002 2532-03 0003 2532-04 0004 5918-10 0011 152029 0012 152081 0013 154016 0014 180014 0015 211213 0016 211505 0017 470026 0018 472005 0019 472016 0020 472022

02 1 00 0

XX 0

02 1

1 1 5 1 1 1 1 1 1 1

SHIELD, BATTERY, MODEL 515 LABEL, WARNING, POLE MOUNT, MODEL 515 BOTTOM COVER, WHITE, 520A, 1265 & 7100 FOAM TAPE, 1 IN. X 1 IN., MODEL 515B & 515C TAPE, 3/4 X 60 YDS, CLEAR, DOUBLE-SI DED ADHES FOOT, RUBBER,.81 SQ X.3 HI W TAPER, WHITE,

FAB, POWER SUPPLY BOARD, SCHEMATIC, POWER SUPPLY BOARD, TEST PROCEDURE, POWER SUPPLY BOARD XFMR, MAINS, PWR SPLY BD CAPACITOR, 220UF 20%, 35V, ALUM, ELECTROLYTIC CAPACITOR, 6800UF, 35V, 20%, AL, ELECTROLYT IC CAPACITOR,.1UF, 50V,. 100 SPACING, DIPPED RA INDUCTOR, 25UH,.25 SPACING, PC MOUNT CONNECTOR, 2 PIN, POST HEADER CONNECTOR, 5 PIN, SQ POST HEADER,.156 SP, FR RESISTOR, 150 OHM, 1/4W, 10%, CARBON RESISTOR, 249 OHM, 1/4W, 1%, CARBON RESISTOR, 2.21K OHM, 1/4W, 1%, CARBON RESISTOR, 4.99K OHM, 1/4W, 1%, CARBON

Model 515B/C Service Manual Rev. 01

Common Assemblies to both Models 515B & 515C

LINE PART NO REV QPA DESCRIPTION 0021 472030 0022 472049 0023 472058 0024 472065 0025 472044 0026 472146 0027 472140 0028 472185 0029 472270 0030 474181 0031 481022 0032 481530 0033 481541 0034 481542 0035 484529 0036 484539 0037 485517 0038 485527 0039 486716 0040 515046 0042 515503 0044 161049 0045 260014 0046 281500 0047 284200 0048 285000

1 1 3 1 1 1 1 1 1 1 1 1 1 2 1 1 1 1 1 1 2 0 1 0 0 0

RESISTOR, 10K OHM, 1/4W, 1%, CARBON RESISTOR, 49.9K OHM, 1/4W, 1%, CARBON RESISTOR, 100K OHM, 1/4W, 1%, CARBON RESISTOR, 200K OHM, 1/4W, 1%, CARBON RESISTOR, 26.1K OHM, 1/4W, 1%, CARBON RESISTOR, 47.5K OHM, 1/4W, 1% RESISTOR, 332K OHM, 1/4W, 1% RESISTOR, 61.9K OHM, 1/4W, 1% RESISTOR, 1.2M OHM, 1/4W, 1%, METAL FILM RESISTOR, 4.3 OHM, 1W, 5%, METAL OXIDE DIODE, ZENER, BZY88C12, 12V, 500MW DIODE, KBU4D, 4 AMP, BRIDGE RECTIFIE R DIODE, UF4002, 100V, 1A, FAST RECOVERY DIODE, UF5400, 50V, 3A, FAST RECOVERY VOLTAGE REGULATOR, LM78L05ACZ, 5V, 100MA, TOVOLTAGE REGULATOR, LT1076CT, 2A, STEP-DOWN, T TRANSISTOR, VN10KM, N-CHANNEL, F.E.T MOSFET, IRF9523,.8 OHMS, 60V, P-CHANNEL, TOLM393NDUAL COMPARATOR FUSE, 2 AMP, 250V, SLO-BLO, IEC127-II FUSE HOLDER, FOR 5MM FUSES, PC MT, SILVER PLA ADHESIVE, HOT MELT, GENERAL PURPOSE, TAN COLO HEATSINK , BLACK ANODI SE D NUT, HEX, NO. 4-40, STEEL, CADMIUM PLATE #4-40 X 1/4 SLOTTED BINDING HEAD STEEL CAD. P LOCK WASHER, NO. 4, INTERNAL TOOTH, STEEL, CA

Parts Lists

2725-01 00 Power Supply Board Assy

LINE PART NO REV QPA DESCRIPTION 0001 2725-03 0002 2725-04 0003 2725-17

00 0 00 0 00 1

SCHEMATIC, POWER SUPPLY BOARD, MODEL 515B & 5 TEST PROCEDURE, POWER SUPPLY BOARD, 515B & 51 POWER SUPPLY BOARD SUBASSY, MODEL 515B & 515C

2725-17 00 Power Supply Board Subassy

PART NO QPA DESCRIPTION

152029 152081 154072 180014 211213 211505 2725-02 280108 474145 474165 474166 474167 474181 474211

CAPACITOR, 220UF 20%, 35V, ALUM, ELECTROLYTIC

CAPACITOR, 6800UF, 35V, 20%, AL, ELECTROLYTIC

CAPACITOR,.1UF, 50V, 10%, X7R, CER CHIP, S M

INDUCTOR, 25UH,.25 SPACING, PC MOUNT

CONNECTOR, 2 PIN, POST HEADER

CONNECTOR, 5 PIN, SQ POST HEADER,.156 SP, FR

FAB, POWER SUPPLY BOARD, 2ND GENERATION

SNAP RIVET

RESISTOR, 215 OHM, 1/8W, 1%, SURFAC E MOUNT

RESISTOR, 10K OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 100K OHM, 1/8W, 1%, SURFACE MO UNT

RESISTOR, 2.2M OHM, 1/8W, 1%, SURFACE MOUNT

RESISTOR, 4.3 OHM, 1W, 5%, METAL OXIDE

RESISTOR, 49.9K OHM, 1/8W, 1%, 1206 STYLE, S

Rev. 01 Model 515B/C Service Manual

Parts Lists

PART NO QPA DESCRIPTION 474214 474215 474216 474217 474218 474219 481044 481530 481552 484559 485532 485535 486805 515085 5918-10

RESISTOR, 332K OHM, 1/8W, 1%, 1206 STYLE, SRF

RESISTOR, 2.21K OHM, 1/8W, 1%, 1206 STYLE, SR

RESISTOR, 4.99K OHM, 1/8W, 1%, 1206 STYLE, SR

RESISTOR, 26.1K OHM, 1/8W, 1%, 1206 STYLE, SR

RESISTOR, 47.5K OHM, 1/8W, 1%, 1206 STYLE, SR

RESISTOR, 61.9K OHM, 1/8W, 1%, 1206 STYLE, SR

DIODE, ZENER, BZX84C12LT1, 12V, SURFACE MOUNT

DIODE, KBU4D, 4 AMP, BRIDGE RECTIFIER

DIODE, MBRS340T3, SCHOTTKY, 40V, 3A, SURFACE

VOLT RGLR, LT1076CT FLOW 30, 2A, STEP DOWN, T

TRANSISTOR, 2N7002T1, N-CHAN ENHAN MODE, SURF

TRANSISTOR, IRFD9020, P-CHANNEL, MOSFET, 4 PI

IC, LM393M, DUAL VOLTAGE COMP, L PWR, SURFACE

FUSE W FUSEHOLDER, 2A, 125V, SLO-BLO, SUBMIN,

XFMR, MAINS, PWR SPLY BD, 515A SB/520A/1265/7

6487-01 00 Rear Panel Assy

LINE PART NO REV QPA DESCRIPTION 0001 2725-01 0002 5812-10 0003 5819-01 0004 6487-17 0005 6497-01 0006 6498-01 0012 210149 0013 216059 0014 280225 0015 281501 0016 285001 0017 285005 0018 286219 0019 515023 0020 161008

00 1 00 2 02 1 00 1 00 1 00 1

POWER SUPPLY BOARD ASSY, MODEL 515B & 515C SPACER, SUPPORT, OXYPLETH - 520A GROUND WIRE ASSY, 3 1/2 IN. L, 0XYPLETH - 520 REAR PANEL SUBAS SY, MODEL 515B & 515C GROUND WIRE ASSY, POWER ENTRY MODULE, 515B & POWER CABLE ASSY, REAR PANEL, MODEL 515B & 51

1 1 0 0 0 0 0 2 0

POWER ENTRY MODULE, SEL FUSE, ON/OFF SW & RFI CONNECTOR, PLUG, POTENTIAL COMPENSATION STANDOFF, 1/2 DIA X 1/2 L, 6-32 F T H D, AL W I NUT, HEX, NO. 6-32, STEEL, CADMIUM PLATE LOCK WASHER, NO. 6, INTERNAL TOOTH, STEEL, CA FLAT WASHER, NO. 8, STEEL, CAD PL SCREW, 6-32 X 1 1/ 4 (31.8) L, PAN HD, PHILLIP FUSE, 1/2A, 250V, SLO-BLO, 5 X 20MM, IEC-127 ADHESIVE, 242, THREADLOCKER, MED STR, BLUE, 1

Common Assemblies to both Models 515B & 515C

6487-17 00 Rear Panel Subassy

LINE PART NO REV QPA DESCRIPTION 0001 6487-10

0002 6487-32

Model 515B/C Service Manual Rev. 01

02 1 00 1

REAR PANEL, MODEL 515B & 515C FACEPLATE, REAR PANEL, MODEL 515B & 515C

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. 2532-03 Schematic, Po wer Supply Bd. 6487-01 Rear Panel Assy 2725-01 Power Supply Assy. 2725/2726-03 Schematic, Power Supply Bd. 2721-01 Main Board Assy, Model 515B 2722-01 Main Board Assy, Model 515C 2721/2722-03 Schematic, Main Bd. Model 515B/C 2723-01 Main Board Assy 2724-01 Main Board Assy 2723/2724-03 Schematic, Main Board, Model 515B/C

Rev. 01 Model 515B/C Service Manual

Schematics and Assembly Drawings

[This page intentionally blank.]

Model 515B/C Service Manual Rev. 01

Novametrix 515B, 515C User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Model 515B

Model 515C

Service Manual

November 15, 1995

Catalog No. 6500-90-01/6550-90-01

[This page intentionally blank.]

Service Policy

Description

Trademark Acknowledgments

[This page intentionally blank.]

Patient Safety

Indications and Usage

Warnings

Cautions

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Front and Rear Panel Illustrations

Summary of Operation

Turning the monitor ON/OFF

Displays

Adjusting Alert Limits

Adjusting Volume Levels

Muting Alerts

Contrast

Electroni c Theory of Operation

2532/2725 Power Supply Board

AC Mains and Battery Operation Overview

AC Mains Operation

Main Board

Power On/Off Control Circuitry

Power Supplies and Voltage References

Sensor LED Drive Circuits

Sensor Photodiode Return Path

20-Bit Analog-to-Digital Convertor Self Calibration

20-Bit Analog-to-Digital Conversion

Sensor Status Decoding and Conversion

Front End Timing Signals

Sensor Status Parameters

Serial I/O Controller

Microprocessor and Memory

Decoding

5.2.13 Microprocessor Supervisor

System Output Ports

5.2.15 Displays

Audio Drive Circuitry

5.2.17 Keypanel and Configuration Header

5.2.18 Graphics Display

2721/2722 contrast circuit

2723/2724 contrast circuit

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Maintenance

Cleaning and Sterilization

Monitor

SpO2 Finger Sensor

SpO2 Y-Sensor

Y-Strip Tapes and Foam Wraps

Ear Clips

Battery Maintenance

Replacing AC Mains Fuses

6.3.1 Assemblies with the earlier Power Entry Modules

Assemblies with the newer Power Entry Module

Changing AC Mains Voltage

6.4.1 Assemblies with the earlier Power Entry Module

Assemblies with the newer Power Entry Module

Assembly Exchanges

Internal Assemblies

Main Board/Keypanel Assembly

Power supply assembly

Replacing the internal battery

Changing System Software

Troubleshooting

Functional Test

Equipment required

Functional Test

Electronic Tests

Assembly Tests

Equipment Required