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Novametrix Medical Systems MARS PO2 TECH 2001, Service Manual

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Novametrix Medical Systems MARS PO2 TECH 2001 Service Manual Download Page 1

Pulse Oximeter 

Model 2001

April 25, 2001

Catalog Number 9400-90-01

Novametrix Medical Systems Inc. Wallingford, Connecticut, U.S.A. 06492.

Copyright 

2000−2001

. All rights reserved. No part of this manual may be reproduced

without the written permission of Novametrix Medical Systems Inc.

Service Manual

Summary of Contents for MARS PO2 TECH 2001

Page 1: ...Number 9400 90 01 Novametrix Medical Systems Inc Wallingford Connecticut U S A 06492 Copyright 2000 2001 All rights reserved No part of this manual may be reproduced without the written permission of...

Page 2: ......

Page 3: ...eans without prior explicit written permission from Novametrix Medical Systems Inc The Model 2001 monitor and its sensors and accessories are covered by the following US patents 5 190 038 5 398 680 5...

Page 4: ...Manufacturing Quality and Safety iv Model 2001 Service Manual Rev 01 This page intentionally blank...

Page 5: ...ata 12 Low Battery Voltage Shutdown 13 Timing Sequencer 13 Data Sampling Controller 13 Sensor LED Drive Circuits 14 Sensor Photodiode Return Path 15 Calibrating the 20 Bit Analog to Digital Converters...

Page 6: ...or 36 SpO2 Finger Sensor 36 SpO2 Y Sensor 36 SpO2 Tapes and Foam Wraps 36 Ear Clip 36 Battery Life and Maintenance 37 Mains Voltage Configuration 37 Fuse Replacement 37 Changing the Mains Voltage Sett...

Page 7: ...stal to the SpO2 sensor site after application Components of this product and its associated accessories which may have patient contact are free of latex The Model 2001 contains no user serviceable pa...

Page 8: ...s When applying sensors take note of the patient s physiological condition For example burn patients may exhibit more sensitivity to heat and pressure and therefore additional consideration such as mo...

Page 9: ...e electrocautery are used patient monitoring may be interrupted due to electromagnetic interference Electromagnetic fields up to 3V m will not adversely affect system performance Federal U S A law res...

Page 10: ...Section 1 Patient Safety Cautions 4 Model 2001 Service Manual Rev 01 This page intentionally blank...

Page 11: ...is equipped with an RS232 serial output port for easy interfacing to external equipment An optional Analog Output module provides analog outputs Per requirements of IEC 601 1 the Model 2001 is classi...

Page 12: ...ed to be used for monitoring oxygen saturation and pulse rate in all critical monitoring environments including ventilatory support and anesthesia Model 2001 is designed to monitor all patient areas i...

Page 13: ...ical Displays Numerical displays and alert limit settings for measured parameters displayed here Also display units and special display options noted here 1 Alert Indicator Flashes red when an alert a...

Page 14: ...ch in position AC Mains voltage allowed into monitor to power unit and or charge internal battery 5 Fuse Compartment The AC Mains line fuse s are inside this compartment Pry open with small screwdrive...

Page 15: ...ing charged and that if the monitor is turned on it is being powered from the line voltage If AC Mains power is removed by unplugging the line cord or setting the rear panel power switch to the 0 Off...

Page 16: ...e 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 thi...

Page 17: ...12 VA the VRAWI that powers the isolated RS232 circuitry and the 5 volt VCC supply that power the remaining circuits in the monitor The Model 2001 turns on The V12 and V12 supplies are rectified and f...

Page 18: ...ne for a gain of 1 617 that provides a 4 096 volt reference approximately supply 4VREF at IC31 pin 1 If jumper JP2 is shorted then VREF will be 3 0 volts and R32 will be adjusted so that 4VREF is stil...

Page 19: ...3 and return the pin 2 output High but the High output at pin 13 keeps the 1 flip flop Set and the POWER key has no effect If at this point the AC MAINS is reconnected MOSFET Q8 continues to block cur...

Page 20: ...e used in conjunction with the SC1 and SC2 inputs The IC42 pin 14 external sequencer SYNC line is equivalent to the PEEL s D1 input It provides a sync pulse to the pulse width modulator on the power s...

Page 21: ...ter consisting of R59 and C90 As shown in Figure 1 the ASAMP signal is active whenever either sensor LED is turned on This causes Q15 to turn off and the charge at C90 passes through the unity gain bu...

Page 22: ...d IC37 respectively The analog input at pin 9 is converted to a digital representation with 20 bit resolution based on the input magnitude The CS5503 A D converter continuously samples its input conve...

Page 23: ...s input to the multiplexer IC33 are described below Note that channel number refers not to the IC33 pin number but to the signal label e g channel I0 signal resides at IC33 pin 13 Channel I0 ADCV12 Th...

Page 24: ...sisting of RP10 pins 1 2 RP8 pins 1 6 and C92 provides a means to measure the cathode voltage of the sensor s Red LED If the channel at IC33 pin 4 is sampled the monitor can determine if the LED is op...

Page 25: ...of 4 on schematic A programmable tone generator IC27 is used to drive the monitor s audio circuit The tone generator is clocked by IC39 pin9 from the 1 638 MHz signal Q1 The tone generator is enabled...

Page 26: ...f Q10 which in turn controls the contrast of the display through a variable negative voltage The backlight for the display is controlled by the DSPBR Display Bright line When DSPBR is high the gate of...

Page 27: ...s with other signals within the PEEL and causes the open drain Master Reset MR output at IC18 pin 13 to be brought low A low MR causes C45 to discharge forcing IC21 pin6 high This sends a reset pulse...

Page 28: ...egulated output of IC2 is sent to pin 25 of the 25 pin D connector on the rear panel in order to power the optional Analog Module or NovaCARD writer module The supply also powers IC1 The Dual RS232 Tr...

Page 29: ...as determined by a separate arbitrator algorithm Power Supply Supervisory Circuits See sheet 2 of 4 on schematic Power is brought on board the DSP module via J2 the host interface connector J103 on th...

Page 30: ...e DSP runs completely in internal memory The DSP then runs at this frequency internally to satisfy the requirements of it s math intensive calculations Once the DSP is up and running it starts the wat...

Page 31: ...your finger and verify a reasonable SpO2 and pulse rate reading 6 Press EVENT button and verify the event is marked with the correct time Press the RUN soft key 7 Disconnect the finger sensor from the...

Page 32: ...he POWER key to turn the monitor on AUDIO Software EPROM Revision Level Turn the monitor on while holding the AUDIO key and the monitor s software revision level is displayed in the message center for...

Page 33: ...omitted or performed out of order be sure that the monitor is set to the correct state before continuing Equipment Required 1 TB500B Sensor Simulator PN 5530 00 The serial number suffix of the simula...

Page 34: ...the event is marked with the correct time Press the RUN soft key 14 Disconnect the finger sensor from the unit verify an alert condition and CONNECT SPO2 SENSOR message displayed 15 Press and hold AUD...

Page 35: ...ng 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 Equipment Required 1 RS232 test fixture PN 5479 01 2 Saturation t...

Page 36: ...Verify 5 000V 50mV Adjust VR1 if necessary To adjust VR1 power down the monitor Remove the 2776 01 board Power up the monitor Adjust the voltage at TP1 Power down the monitor re install the 2776 01 b...

Page 37: ...Description 1 Auto Test 2 RAM Test 3 ROM Test 4 Real Time Clock Test 5 Audio Volume Test 6 Audio Frequency Test 7 RS232 Loopback Test 8 Keyboard Test 9 Mains Test 10 20 Bit ADC Test 11 8 Bit ADC Test...

Page 38: ...t to 82 Press and hold the audio alert key Verify the 2 minute silence LED momentarily turns on then the audio off LED turns on Blinking and the audible alert is silenced 20 Change the TB500B power sw...

Page 39: ...hen done 35 Set the mains switch from to O verify the green LED on the front panel goes out and a battery icon is displayed in the lower right corner of the SPO2 display Verify the monitor continues t...

Page 40: ...Section 7 Electronic Tests Safety Testing 34 Model 2001 Service Manual Rev 01 This page intentionally blank...

Page 41: ...fe and Maintenance on page 37 Functional Test This test verifies overall functional integrity of the monitor and sensors See Functional Test on page 25 Accuracy Test This test verifies the calibration...

Page 42: ...use a broken or damaged sensor or one with wet contaminated or corroded connectors Perform a Quick Check to verify the integrity of the sensor SpO2 Y Sensor Do not immerse connector on the Y Sensor Th...

Page 43: ...el is illuminated and allow the monitor to charge for 24 hours before switching it on Mains Voltage Configuration The rear panel power entry module indicates the mains voltage setting for the monitor...

Page 44: ...fuse access door and verify that the proper mains operating voltage is displayed Changing the Mains Voltage Setting 1 Check that the monitor is OFF 2 Set the rear panel power entry module switch to O...

Page 45: ...module 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...

Page 46: ...should be performed by qualified service personnel only 7 Ensure the monitor is Off Disconnect the line cord and sensor Remove the four cover screws from the bottom cover Holding both case halves tog...

Page 47: ...upply Board and Battery should be exposed 10 The separate sections of the monitor can now be removed 11 IMPORTANT The battery is connected to the Power Supply Board through connector P302 Before attem...

Page 48: ...features or be maintenance upgrades To install a new EPROM 1 Follow the steps listed in Assembly Exchanges on page 40 to open the monitor Be sure to disconnect J102 from the 2775 Main Board to ensure...

Page 49: ...on a site too thick Reposition the sensor on a thinner less opaque section of tissue ERROR FAULTY SEN SOR Sensor faulty Remove sensor from use and contact qualified service personnel CHECK SENSOR SITE...

Page 50: ...fully entered into trend memory MONITOR PERFORM ING SELF TEST Monitor is performing its power up system diagnostic tests Parameters Reset To Factory Default Displayed when monitor is turned on while p...

Page 51: ...limits 100 50 Visible alarm is immediate Audible alarm occurs after 10 seconds of continuous violation of the set limit or immediately Limit values are retained in memory when monitor is turned off o...

Page 52: ...y recharged in 12 15 hours maximum Additional Features 2 Minute Silence When AUDIO key is pressed deactivates audible alerts for two minutes Indicated by illuminated 2 Min LED Audio Off Feature user s...

Page 53: ...turation Sensor Extension Cable 6 feet 4943 00 Saturation Sensor Extension Cable 10 feet 6147 00 Saturation Sensor Extension Cable 50 feet 5266 00 Saturation Sensor Extension Cable 25 feet 8776 00 Sup...

Page 54: ...791 36 Y 36 Plan The Plan length is 36 months Includes 9 boxes of any Y Strip Taping Systems 8791 60 Y 60 Plan The Plan length is 60 months Includes 15 boxes of any Y Strip Taping Systems 8776 36 Fing...

Page 55: ...r 6062 00 NovaCARD Reader Module includes power supply and cable to PC serial port 6065 00 NovaCARD for Windows 3 disk and RTU license 6066 07 NovaCARD for MS DOS 3 disk and RTU license 6068 00 SRAM M...

Page 56: ...tand includes base casters tilt swivel head post poll handle utility basket Requires either 140095 or 140101 Mounting Plate Kit Normal warranty Monitor 1 year Finger Sensor 6 months 9400 81 Model 2001...

Page 57: ...ACCESSORY 1 016 9026 32 LABEL MANUFACTURED IN USA 1 017 9400 01 MAIN ASSEMBLY 2001 1 019 9400 09 OVERALL WIRING DIAG 2001 0 025 9621 16 LENS ALERT MODEL 515 1 026 9629 01 TOP CVR ASSY 2001 1 Seq Item...

Page 58: ...T WHITE 2 006 5826 10 FOOT PAD BOTTOM COVER 4 007 5849 10 BRACKET SUPPORT 1 008 6868 13 BOTTOM COVER 1 013 160044 ALCOHOL ISOPROPYL 0 014 161007 ADHESIVE 414 HIGH STRENGTH 0 015 161064 TAPE 3 4 X 60 Y...

Page 59: ...TOR 10 OHM 1 2W 1 000 472041 RESISTOR 20K OHM 1 4W 2 000 472063 RESISTOR 162K OHM 1 4W 1 000 472200 RESISTOR 5 6 OHM 1 4W 1 000 487064 IC CNYl7 III PHOTON COUPLED 4 000 154058 CAPACITOR 022UF 100V 1 0...

Page 60: ...0 472198 RESISTOR 3 3 OHM 1 4W 1 000 474098 RESISTOR PACK 100K 4 000 153027 CAPACITOR 220PF 50V 1 000 472030 RESISTOR 10K OHM 1 4W 7 000 474133 RESISTOR PACK 10 OHM 2 1 000 474086 RESISTOR PACK 10K OH...

Page 61: ...C 1 000 474256 RESISTOR 0 OHM 2 000 481546 DIODE SWITCHING 2 000 481547 DIODE BAT54 1 000 215073 SOCKET 32 PIN PLCC 1 000 230025 CRYSTAL 3 6864 MHZ 1 000 154104 CAPACITOR O1UF 50 3 000 154080 CAPACITO...

Page 62: ...1 000 471400 RESISTOR lOOM OHM 1 000 153006 CAPACITOR 47PF 63V 4 000 486298 IC MM74HC4O2ON 1 000 486680 IC MM74HCS73AN 4 000 9715 07 PROGRAM PEEL ASSY 1 000 9716 07 PROGRAM PEEL ASSY 1 000 154076 CAP...

Page 63: ...NVERTER 1 000 210051 CONNECTOR 25 PIN 1 000 180011 FERRITE BEAD 22 AWG 1 004 487053 IC AD712JN 2 004 486717 LF353N DUAL BI FET AMP 2 Seq Item Nbr Description Qty 000 211505 CONNECTOR 5 PIN SQ 1 000 47...

Page 64: ...3A 1 000 474341 RESISTOR 4 3 OHM 3 1 000 481563 DIODE SCHOTTKY SA 2 Seq Item Nbr Description Qty 001 2485 02 FAB ANALOG OUTPUT CONTROL BD 1 002 2485 03 SCHEMATIC ANALOG MODULE 0 003 5894 10 RIBBON CA...

Page 65: ...TE ANALOG MODULE 1 005 161059 TAPE FOAM POLYETHYLENE 0 006 280197 STANDOFF 3 16 HEX X 5 8L 0 007 280198 STANDOFF 3 16 DIA X 3 8L 0 008 280187 STANDOFF 187 DIA x 5 8 0 009 284003 SCREW NO 4 X 1 4L SELF...

Page 66: ...Section 12 Parts Lists 60 Model 2001 Service Manual Rev 01...

Page 67: ...iagram 9400 00 Main Assy Model 2001 9400 01 Oximeter Unit Assy 2726 01 PSU Board Assy 2726 03 PSU Board Schematic 2775A 01 Main Board Assy 2775A 03 Main Board Schematic 2776 01 DSP Board Assy 2776 03...

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