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Service Manual - Frank`s Hospital Workshop

1. R5B C ctos C107 os 2 4 IC41 1 1679 n ps A rere C95 NENNEN o Ic13 5 C23 sD _ L R49 1255 RP12 m caa amp Ro C27 P 3 7 Bx C82 Kup PX sx Ce 6 C19 06 1 R17 R15 cis 5 17 ES ESS 5 29 R10 U C55 prol Ld ONovametrix 19 XX IC17 5715 07 XX 8 nnnnnnonnnnnnnenannnnnannnnnnnng EA 2 36 R3 C 6 I R62 2 73 F81 a SR MOUNT C112 BETWEEN MOUNT C113 BETWEEN 6 1 AND IC16 63 19 4 AND 1 19 11 WITH PIN 63 LEAD AS SEE NOTE 3 np 10 00 1C18 MOUNT C111 BETWEEN 18 7 amp 8 10 SOLDER SIDE OF BOARD DETAIL A SCALE NONE FUSEHOLDER F1 amp F2 SEE DETAIL C Q5 PREP SEE DETAIL SOLDER SIDE MODIFICATIONS LOCATE FB3 ON Q5 2 peta B n SEE DETAL ror i Q5 SUBASSEMBLY 4 05 Ye BEND TRANSISTOR FORWARD J REF LEAD TRANSITION APPROX HALF WAY 60 REF POINT AT LEAD TRANSITION POINT SEE NOTE 4 DO NOT BEND LEVEL DETAIL 5 THE FOLLOWING COMPONENTS ARE NOT FITTED TO THIS ASSEMBLY 151 FOR TEST PROCEDURE SEE 42471 04 ENSURE THAT IC2 AND Q16 ARE NO HIGHER THAN C9
2. 1224 MSM6242BRS 1 1229 07528 ws ___ 7 IC31 TLC5491P i32 IC33 MM74HC4051N IC34 CS5503JP 35 LT1019CN8 2 5 IC36 TLO74CN IC37 CS5503JP IC38 AD712JN IC39 MM74HC4020N IC40 IC18 N PEELI18CVB 1 19 MM74HC14N 20 HM62256LP 12 IC21 MM74HC14N 14 IC22 MM74HC138 16 EE 1225 MC74HC32N C43 TO D GND C52 TO D GND C56 TO D GND C58 TO D GND C108 TO D GND C83 TO A GNO C84 TO A GND C70 TO A GND C68 TO D GND C75 TO D GND C74 TO D GND C76 TO D GND C77 TO D GND C82 TO A GND C71 TO A GND C86 TO A GND C79 TO D GND C78 TO D GND C80 TO D GND C81 TO D GND C988 TO A GND C99 TO A GND C101 TO D GNO TLE2022CP C102 C93 TO A GND C106 TO A GND C107 TO D GND C65 TO A GND C66 TO A GND TO A GND 1000 13 IC41 DG444DJ IC42 A PEELI8CVB 20 IC43 LM79L05ACZ ic44 LM78LOSACZ 1C45 E1166 1C46 MC74HC32N o tll U OUT C47 TO D GND ies DPD TTB eT UT D NOTES N 1 17 IS PART 5 02 PROGRAM AN C18 IS PART OF CSIO CONTROLLER PROGRAM A 1C42 IS PART OF TIMING SEQUENCER PROGRAM POWER 15 INDIRECTLY CONNECTED THROUGH ADDITIONAL COMPONENTS 5 UNLESS OTHERWISE SPECIFIED RESISTOR VALUES ARE IN OHMS 1 4W 1 6 LAST REFERENCE DESIGN
3. 2046 NVdX3 NOH uH XX NAH A 1 INVH9OLSIH S e dsig 1 3SV31d 5 1 S9NISVH3 NNAW NIVIA SUWI 20 1105 129 95 1 2046 ON SAA amp 1 1 3svu3 A puoi si 2045 avos juo 1eedde 37705 x NIVIN 26 994 2 OLNV 145 VLVG LON LAS 3dSvH3 lt SNOILdO 2 UOISIA9H 9911 nu l wH LT IdAXO sBumes 1 Jo euo XX xx eBueuo IM M91 1osinO NIYIN lt gt a d S SS WW HH QGOWNWIA 3SV3 ld spw olnv 10 u6noua pue 10 S pue 1 ddn 2 0 55914 NIVIA peioejes uo 22 gt OLNV T 185 SUW 19
4. Seq Item Nbr Description Qty 000 153051 CAPACITOR 22UF 1 000 474135 RES PACK 100 OHM 1 000 481031 DIODE ZENER BZX79 1 001 2755 01 TONE GEN REPL BOARD 1 000 472037 RESISTOR 13 7K OHM 2 008 284217 SCREW 4 40 X 3 16 0 000 180067 FERRITE BEAD 600 uH 15 000 215080 SOCKET 32 PIN PLCC 1 000 481050 ESD SUPPRESSOR 2 002 2775 02 FAB MAIN BD 1 000 212136 CONN 10 PIN HDR 1 000 5715A 07 PROGRAM SPO2 520A 1 000 211237 CONNECTOR 2 PIN 1 000 486845 IC 2 5 OR 3 OV V R 1 006 161039 FOAM TAPE 1 32THK 0 010 5712 10 TRANSFORMER MAIN BD 1 010 5711 10 TRANSFORMER MAIN BD 0 2471 28 MAIN BD KIT part of 2775 01 18 17 Seq Item Nbr Description Qty 001 180012 FERRITE BEAD 1 000 484535 VOLTAGE REGULATOR L 1 000 486295 IC MM74HC40S1N 1 000 484534 VOLTAGE REGULATOR 1 000 486625 MC74HC32N 1 QUAD 3 000 211414 CONNECTOR 4 PIN 1 000 152085 CAPACITOR 1500UF 2 000 515511 FUSEHOLDER VERT 2 000 484533 VOLTAGE RGLTR 1 000 484523 VOLTAGE REGULATOR 1 000 484529 VOLTAGE REGULATOR 1 000 487061 IC TBA82OM MONOLIT 1 000 486300 IC TLC549IP 8 BIT 1 000 487069 IC LT1019CN8 2 5 1 000 486712 TLO74CN QUAD F FET 2 000 152086 CAPACITOR 1000UF 2 000 485528 MOSFET N CH 1 000 486651 MM74HC138 I C 1 000 471400 RESISTOR IOOM OHM 1 000 153006 CAPACITOR 47PF 63V 4 000 486298 IC MM74HC4020N 1 000 486680 IC MM74HC573AN 4 000 9715 07 PROGRAM PEEL ASSY 1 000 9716 07 PROGRAM PEEL ASSY 1 000 154076 CAPACITOR O1UF 2 000 481
5. 1 J91uoo 46 494 772 UOISIA9H 9911 NUS w HLTIdAXO uondo ON SHA LH3V 93S 01 uodo 12 330 ON SHA G3HO1V1 uva 1H31V uondo 199jes AdHd AOVAYALNI QHVOVAON LAS 5199196 4 NNIN 40135 ZOdS s eldsiq xy T HV8 Z SNOILdO 13V 145 T INOOVAON SLE 035 124145 145 JAQON 29 5 4 3OV4AHualNI YALNIYd IX3N 145 SERERE ON SEPeISS L 519 dO1S 124145 x 1 135 GASNNN 1 135 0101 0921 speis 4 8 SLI8 V1VO 193135 13S 0101 0921 146 Poenau dVOVHVS 5100 95 ANON ALIHVd 193 13S 1 Las 5 138 0021 anva 194145 uondo 109196 1 155 4 3GOWN 1 7703 SAA 1d
6. 67 Figure 14 Connecting the Model 315 Printer 68 Figure 15 Configuration of Seiko Thermal 68 Figure 16 Connecting the Seiko Model DPU 411 Printer 69 Figure 18 Analog Output Module 70 Figure 17 Analog Output Module 70 Figure 19 Analog Output Setup rr 71 Vil Model 520A Service Manual 5693 90 01 5 Jun 01 T List of Tables Table 1 Table 2 Table 3 Table 4 Table 5 Display Command Data 30 CSI O Decode LIn8s 32 SpO2 Display tolerances for TB500B settings 57 Analog Output Module Voltage Tolerances 71 Schematic and Assembly Drawings 93 Model 520A Service Manual Section List of Tables ix Model 520A Service Manual 5693 90 01 5 Jun 01 Introduction Purpose 1 1 This manual has been prepared for technicians servicing the Novametrix Model 520A Pulse Oximeter monitor It presents technical information relating to the monitor s theory of operation maintenance calibration and repair Refer to the Pulse Oximeter Model 520A User s Manual Catalog Number 5693 23 for ad
7. ouc 8 2 SVRE o C183 Gnd 4 V AGND 4 1C44 S QUT 781 05 C67 CND luf lt n 59 LEDISK 4 o 3 1 v 41 0k 1 2 v5 GND C64 luf x 6 RPS 79 85 41 0 QUT CSADC3x V luf 108k 41 8k LED2SK gt 1S pF 1642 vcc SCHAN ANALOG 3 gue HUX DHUX IC33 121 i B 18 RDLEDx 17 IRLEDx RP8 16 SIGNDx 41508 15 ASAMP 14 SYNC 13 ISHPx 15 DC V 12 m H EDSRC 14 BIT BIN RP18 INTgHs COUNTER 41 0k 8 131 vaar RP3 1 i 7 8 7 R42 66 5k 0847uf 11 Negi teAugs9 00 NOT SCALE UNLESS OTHERMISE SPECIFIED A 5 RP8 4 R34 Ik Di4 4148 57 3Jun98 DIMENSIONS ARE IN INCHES Ima SCHEMATIC MAIN BOARD 41 8k 41 0k Y mS MN y sues MFG ENGR APPROVED CODE REV 1236 z arv E Kersey V N348 135ep94 FILE 11 Aug 99 5 15 92 15 May 92 2471 03 11 TIME 11 51 08 3 BREAK ALL SHARP EDGES OXYPLETH 520 NOVAMETRIX DRAWN __ CHECKED Tony Esposito H R Lineback 15 92 Medical Systems Inc Wallingford CT USA 86492 REV FR NO BY DATE USED DN 02471 01 SCALE NONE SHEET 3 5 2 1 6 5 4 3 2 1 This document contains information which is pro pr etary and the property of Novametrix Me
8. YY 154076 CAPACITOR OtuF 63V 1 POLYPROPYLENE C15 C19 47408 RESISTOR PACK 10k 2 B BUS RES RESISTOR PACK 100k OHM 27 B BUS RES RP7 RP13 Yi 486680 IC MM74HCS73N CMOS IC13 1C15 28 RESISTOR PACK 100k OHM 2 5 ISOL RES 486685 IC AD7528JN CMOS INTERFACE IC29 474131 RESISTOR 10k OHM 2 5 BUS RES RI 35486712 IC TLO74CN QUAD F FET LOW OFFSET IC30 IC36 474152 RESISTOR PACK 41k OHM 2 4 ISOL RES RP10 RP12 474131 RESISTOR PACK 10 OHM 2 4 ISOL RES RP9 474177 RESISTOR PACK 41k OHM 2 8 BUS RES RPB Y4 487053 IC AD712JN DUAL OP AMPLIFIER IC38 IC40 474135 RESISTOR PACK 100 OHM 2 5 ISOL RES 11 IC TBAB20M MONOLITHIC INT AUDIO 2W IC26 487064 IC 17 PHOTON COUPLED ISOLATOR 1c3 iC6 I 50487065 IC UC3843N CURRENT MODE PWM CONTROLLER 1 9 475034 POTENTIOMETER 2k OHM 10 1 T TOP ADJ VRI 35487069 IC LT1019CN8 2 5 16V VOLTAGE REFERENCE IC35 2 07 N403 25JuI96 mess OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES mm 05 jN36222M0195 BREAK ALL SHARP EDGES MAIN BOARD ASSY NOV 12 05 1348 4 94 ros 520A NOVAMETRIX WS 11 N681 134u 99 N325 8293 fn WALLINGFORD CT U S A 06492 5 DENOTES COMPONENTS COMPRISING 10 557 3Juns8 316 SIMARI SI DRAWN MR
9. NES 28 Real Time Clock 29 Sound generatorar 29 Keypanel Interface eene toe ferra 30 Display Interface reete 30 VO Device Controller rs eode es 31 Watchdog TIMET alas ends 31 Seral 32 RS232 Serial 33 eer 35 General unu 35 Maintenance Schedules teuer tete 35 Cleaning and 36 Model 520A tr cet ore eat ted 36 FINGER SENSOM au a s ET 36 Y SENSOR and Y STRIP Taping 36 Battery Life and 37 Mains Voltage Configuration 37 Fuse 8 37 Changing the Mains Voltage Setting 38 AC Mains on older style 39 Replacing the AC Mains 40 Changing the AC Mains 40 Assembly Exchanges ct ost 41 Changing System Software 44 C
10. 5232 4913 00 CONNECTOR 77 Nw ADAPTER POWER SWITCH Figure 14 Connecting the Model 315 Printer 3 Connect the printer s AC adapter if desired 4 Turn the printer on first then turn the Model 520A on 5 Select 315 from the Ser Serial portion of the Model 520A Options Menu 6 Referto the Model 315 documentation for further printer details Connecting Seiko DPU 411 Thermal Printer 15 4 To connect the SIEKO Model DPU 411 Thermal Printer to the Model 520A 1 Setthe DIP switches located on the bottom of the DPU 411 First bank of eight switches 1 2 down off 3 4 up on 5 6 down off 7 8 up on Second bank of six switches 1 3 up on 4 6 down off HHHHHHHH BHHHHH te 12345678 123456 Seiko DPU 411 bottom view Figure 15 Configuration of Seiko Thermal Printer 68 Model 520A Service Manual 5693 90 01 Analog Output Module 5 Jun 01 2 Connectthe printer interface cable PN 5861 00 to the RS232C connector on the Model 520A Connect the 25 pin connector at the other end to the 25 pin D connector on the rear panel of the DPU 411 upper connector Plug the cable DC power plug into the rear jack of the Model DPU 411 Seiko Model DPU 411 INTERFACE CABLE 5861 00 DC POWER PLUG part of 5861 00 cable Figure 16 Connecting the Seiko Model DPU 411
11. LINEST UC3843 DGND VIN R6 033 12w 10 R62 47 5k TXo Q3 10K BC214C R61 409 i TxKE 10K C28 R22 C109 2 2u 35v gt 10k 220u 63v RP4 D8 100k 1N4148 a VBACK A 110 VBACK 475 PWRON lt 4093 PEE VBACK C24 E C12 P2950A BAT82 as VIN VOUT D18 c21 i CHA 5 85250 C22 1N4148 4093 2 20 35v 9 OFFDIS amp II o 6 07 RP4 RP4 100k 1N4148 100k C27 T 47u 10v Ferrite Bead Thru_Hole ISOLATION BARRIER 100p R65 112 R25 475 C6 10u 16v tant 61302 NOTE JUMPER W1 CONNECTS 2 3 FOR MODEL 520A AND 1 2 FOR MODEL 2001 Q4 BC214C 475 Qt BC214C Rxo lt lt lt vec 5 100k C R2 475 Q2 NZ Ra 100M R69 470k BC214C iW 5 1 4RW 5 J SCHEMATIC MAIN BOARD Novametrix Ee 520A amp 2001 C117 C118 4 Medical Systems oe ipt men D a Checked 1 Barnes Industrial afm oo Wallingford USA 06492 220p 220pf 03 50000 Mig Approved Document Number R 1 sapo TC ovoctaa p 2775 amp 2775A 03 N727 173 00 F e 27750304 Fe Ey Date Date Friday November 17 2000 EH ue E IET EC Bl a PEU Et Z4 9502 NOTES
12. 3 Press the ZERO key and adjust the analog baselines on the recorder Press the FULL key and adjust the recorder full scale deflection Press the HALF key and check that the recorder registers at half scale Analog Min Max Voltages Signal Referenced to Pins 2 3 Pine ZERO HALF FULL Pulse Rate 1 0000 0012 0 477 0 520 0 955 1 030 Saturation 4 5 0 000 0 012 0 477 0 520 0 955 1 030 Plethysmogram 8 9 0 000 0 012 0 477 0 520 0 955 1 030 Table 4 Analog Output Module Voltage Tolerances Note Earlier versions of the Analog Output Module have a 2 5 volt maximum scale for the Plethysmogram and Pulse Rate 1 25 volt half scale 5 Jun 01 Model 520A Service Manual 71 Section 15 Connecting to other Equipment 4 When the recorder is properly adjusted press the RUN key The monitor will return to Monitoring Mode and automatically begin outputting analog data to the Analog Output Module Note This setup procedure does not have to be performed each time the monitor is turned on the monitor will always automatically output analog information via the Analog Output Module this procedure simply helps to calibrate the recorder to the Model 520A signals 72 Model 520A Service Manual 5693 90 01 1 Specifications General 16 1 Specifications for the Novametrix OXYPLETH Pulse Oximeter Model 520A are listed for informational purposes only and are subject to change without notice Oxygen Saturation SpO
13. 1 l 13534 ANON XX XX 5 LAS NOISS3HdlAOO LNIHd 194135 nU9 A PM 1u ned sideooy en snoneid NIVIN NIYIN QI 1uened sie lo NIV vc 15 1 NNaW SHH SSV T J S Ho s EIE TEM LNAlLWd gt QNHL uH 1577 VNI SNIN 06 1SV1 LONOLNIYd 9NLLVNIAH3 L SNOILdO LNIHd 124145 6 1 splen 25 H131d 9NIZIS3H 6 0 seouenbes 1591 5494135 enpou ANA WNDIS 3ZIS3H LONNVO QHVOVAON NIV GYVOVAON 91015 595944 NNAW NIVIA 1309 4015 5 NI sak Bunuud jueseud jeufis AWIL 3801 ANAW QHVOVAON SNOILdO SNOILdO SNOILdO 9013 HOLINON eq YOLINOW 2045 NO eq uondo QHVOVAON 9uL snw eoeyeju jejuud v 18 3715 OLNY INHOJ3AVM ANNAN quvo QNHI LNdd 375 QNHl l1HlV 48jueo 48juao 48jueo snolA 1d 20 00 S LA
14. 1 040 515046 FUSE 2A 250V 1 020 472022 RESISTOR 4 99K OHM 1 044 161049 ADHESIVE HOT MELT 0 028 472185 RESISTOR 61 9 OHM 1 035 484529 VOLTAGE REGULATOR 1 014 180014 INDUCTOR 25UH 25 1 027 472140 RESISTOR 332K OHM 1 012 152081 CAPACITOR 6800UF 1 037 485517 TRANSISTOR VN1OKM 1 041 515035 FUSE 1 2A 250V 1 034 481542 DIODE UF5400 2 033 481541 DIODE 100V 1A 1 004 5918 10 XFMR MAINS PWR SPL 1 017 470026 RESISTOR 150 OHM 1 023 472058 RESISTOR IOOK OHM 3 018 472005 RESISTOR 249 OHM 1 043 600034 RIBBON CABLE ASSY 1 030 474181 RESISTOR 4 3 OHM 1 039 486716 LM393N DUAL COMPARATOR 1 022 472049 RESISTOR 49 9K OHM 1 019 472016 RESISTOR 2 21K OHM 1 038 485527 MOSFET IRF9523 1 031 481022 DIODE ZENER BZY88C 1 026 472146 RESISTOR 47 5K OHM 1 042 515503 FUSE HOLDER FOR 5MM 4 021 472030 RESISTOR 10K OHM 1 5693 90 01 520A Service Manual 5719 01 FRONT PANEL ASSY Seq Item Nbr Description Qty 015 211213 CONNECTOR 2 PIN 1 013 154016 CAPACITOR 1UF 5 011 152029 CAPACITOR 220UF 1 025 472109 RESISTOR 37 4K OHM 1 029 472270 RESISTOR 1 2M OHM 1 5719 01 FRONT PANEL ASSY 18 7 Seq Item Nbr Description Qty 006 280033 SPACER 4 X 1 8 0 003 5720 01 DISPLAY ASSY 1 001 2473 01 ALERT BOARD ASSY 1 010 285000 LOCK WASHER NO 4 0 002 5676 27 MEMBRANE KEYPANEL 1 008 284200 4 40 X 1 4 SLOTTED 0 007 280187 STANDOFF 187 DIA 0 004 6278 10 SHIELD VFD 1 009 2
15. Fuse housing NOTE 5 mm X 20 mm fuses are installed toward the back of the fuse housing as shown 3AG type 5 X 20mm type Replace the blown fuse s with the proper type and rating 6 Reinstall the fuse housing When positioning the housing into the power entry module make sure that it is oriented correctly Press the fuse housing back into the power entry module 7 Close the fuse access door and verify that the proper mains operating voltage is displayed Line operating voltage q p Changing the Mains Voltage Setting 10 5 2 Check that the monitor is OFF 2 Setthe rear panel power entry module switch to OFF Remove the line cord from the 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 100 120 VAC 0 5 A 250V 38 Model 520A Service Manual 5693 90 01 Mains Voltage Configuration 200 240 VAC 250mA 250V 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 B p Fuse housing Fuse access door 4 Install the proper type and rating fuse for the mains voltage setting
16. pq NIVIN 1ueuno peq uo eui 3129 591 YAWIL AV IdSIa IIM uonoejes JUNI Aejap yale jeroeds eui sioejes fits 54 AV I3G 1viO3dS X n uondo pjeu eui sioejes 4 330 TVN IS QV8 NO 1H31V aleMYOS 2 UOISIAOY 9911 NUS wiHLATdAXO Spuooes 10 ploy pue TXX AWMOA LAS 1009 e dsip 2 NNaW sheidsiq NIVIA I 1X3N L SNOILdO HOLINOW 26 49 joejes snoi eJd NIVIA 48875 LSNV SNILVH3dO 193138 NIN SNOILdO WALSAS u Jeedde jim dgvi SMOlIV SHA d 18v IIVAV d8Vl eldsip ul 3 ul d uondo eui 1 7 321 WHOJJAVM OddS SHAWIL cods 4 NIVIN 3ZIS davi 3GOW SNOILdO dNLAS 2085
17. ON OFF C m SEENOTE2 C62 TML AOL This supply connects back to switcher 45v BTL O DSPBR C110 1000u 16v E1166 CON4 1N4148 This point connects back to switcher gnd 15 74HC573 NOTES RDKEY 2 lt lt 1 UNLESS OTHERWISE SPECIFIED RESISTANCE VALUES ARE IN OHMS 1 4 W 1 CAPACITANCE ARE IN FARADS 2 GENERATOR BOARD 2755 01 FITTED IN PLACE OF 27 1 3 LAST REFERENCE DESIGNATOR USED C116 D18 F2 FB18 IC46 J109 JP2 L2 Q17 R68 RP13 SG2 T1 TP2 VR1 W1 4 REFERENCE DESIGNATORS NOT USED C31 C36 D10 R23 R27 5 2776 01 ASSY IS PART OF 2775A 01 ASSY SCHEMATIC MAIN BOARD 520A amp 2001 1 Barnes Industrial Park Road EJM Checked 12Aug99 MRL Wallingford CT USA 06492 5Oct00 Mig Approved Document Number ode Rev V o 172 00 Fie 27750304 of 4 Friday November 17 2000 Novametrix Medical Systems Inc VBACK C113 fee 100 4 78112 100k 12 lt VOUT VIN D6 o C13 UF4002 z 47 25 1N4148 C18 100 115 C12 470u 25v D4 7 10 100 79112 03 UF4002 12 lt VOUT VIN a C114 JF5400 R67 100 z 1 C9 C17 9 1 1500u 16v 100p 10u 16 tri C20 18uH 1000u 16v 22 5 2k C26 FB18
18. SCHEM TIC MAIN BOARD OXYPLETH 520A DRAWN CHECKED i Tony Esposito M R NM dati tad CT uda RISO Jan 38 1991 22May92 9 APPROVED NO CODE REV k ersey 5 22 92 22 92 2471 03111 USED ON 02471 81 SCALE NONE SHEET 5 OF 5 e 1 8 7 6 5 SEE NOTE 1C 107 2 0 5 4104 la n 2 2 0 0 5 Ol 2 0 2 32 nos 10 4103 8 lt mm 4108 eus Clo ZEE amp 1 C17 B e 15 07 97 SECURE Y3 TO BOARD WITH FOAM TAPE 3 16 IN X 1 16 IN SEE NOTE 1C 4 J103 2776 42 PART OF 2775 01 PART OF 2775 01 9 SEE NOTE 1C PART OF 2775 01 REMOVED FOR CLARITY SEE NOTE 1D SEE SHEET 2 FOR SOLDER SIDE ASSY 2775 01 W1 ACROSS 520A amp COM PINS 2775 01 W1 ACROSS 2001 amp COM PINS NOTES 1 GENERAL SPECIFICATIONS ASSEMBLY 15 SHOWN FOR REFERENCE ONLY FOR TEST PROCEDURE SEE A2775 04 WHEN MOUNTING 2 Q5 AND 016 ENSURE THAT THE HEIGHT 15 NO HIGHER THAN C9 HAND SOLDER TRANSFORMER T1 DO NOT WAVE SOLDER INSTALL 2755 BOARD AT 27 WITH ORIENTATION AS SHOWN DRAWING TABULATION DWG REV TITLE 02775
19. This document contains informotion which is pro prietary ond the property of Medical Systems Inc ond may not be reproduced used disclosed in whole in port without the written consent of Novometrix Medico Systems Inc e CAUTION FEDERAL U S A LAW RESTRICTS THIS DEVICE TO SALE DISTRIBUTION OR USE BY OR ON THE ORDER OF A LICENSED MEDICAL PRACTITIONER 58 2 100 120V CAUTION EQUIPMENT MUST BE GROUNDED AT ALL EJ 18 9v P Gl e 6 mE Ll PATENTS 5 190 058 5 398 680 USA DIARI RS232C NOVAMETRIX ACCESSORIES X NOuvafuvs HAZARD A5 AS MARKED A EAN REPLACE FUSE 250 2 200 240V TIMES TO AVOID DANGEROUS ELECTRICAL SHOCK MUST BE ATTACHED WITH 46 32 X 3 8 LONG WARNING POLE MOUNTING PLATE SCREWS ONLY 800 243 3444 in Conn Coll Collect 203 265 7701 A 2 FOR REPAIR SERVICE Call Conn Factory Toll Free MEDICAL SYSTEMS INC WALLINGFORD CT U S A NOVAMETRIX 512 POWER 100 120 200 240 VAC 50 60Hz 40 e 5 J C 8 WEIMAR 7700 35104 gt 52 WIPE UNIT CLEAN WITH ISOPROPYL ALCOHOL FOR OVERALL WIRING DIAGRAM SEE 5693 09 ACCESSORY SIDE POUCH ITEM 17 IS NOT SHOWN INCLUDE POUCH WITH MONITOR
20. 1Quf 50v vcc 11 0 c1l2 8 bit Micro Computer s ie 190 i cue 3 gt o a 100 2 2 IC46 i 14 74HC14 748614 15 pi 1 RPS 1 1 i 23 SPARES 1 DO NOT SCALE 1 19 11 er SCHEMATIC MAIN BOARD S 19d 1e OXYPLETH 520A NOVAMETRIX 74 14 5 7 5 Medical Systems Inc Wallingford CT USA 96492 1 19 265 97 DRAN CHECKED ony Esposito Lineback 13Aug96 7E TNISH Jan 38 1991 15 APPROVED DAC NO CODE REV E erse 45 135 4 FILE 247193116 2471 03 11 DATE 12 Aug 39 REV FR NO DATE TIME 15 40756 USED ON 02471 01 SCALE NONE SHEET 2 OF 5 8 7 6 5 i 4 3 2 1 This document contains information which 15 pro prietary and the property of Medical Systems Inc and may not be reproduced used or CONTROL To Sheets disclosed in whole in part without the written 3 1 3 and 4 consent of Novametrix Medical Systems Inc C184 47 R58 188k Z J188 1041 DG444 V12 up 859 DET Sc ____ gt 4 DET2 R35 111919 8 2 5 bx 8 41 1C35 lt
21. R13 486299 IC CS5503 JD EP 20 81 A TO D CONVERTER 15 KU RM To GT SP CS CAPACITOR 22pF 100V 24 CERAMIC C34 C35 C57 C59 9155013 CAPACITOR 33pF 100V 2 MTLZD CERAMIC C38 C39 C51 E 153021 CAPACITOR 47uF MULTILAYER CERAMIC c16 P2 Yy4867 2 153027 CAPACITOR 220 50V 10 SP RADIAL 153038 CAPACITOR 001uF 50V 5 1 SPACING YX 153046 CAPACITOR 4700pF 100V 10 CERAMIC PL c72 153051 CAPACITOR 22uF 50V 20 MLTLYR CERAMIC C53 153052 CAPACITOR 022uF 50V 1 SPACING C54 153062 CAPACITOR 150pF 100V 5 2 SF RADIAL 112 114 C2 C12 C14 C21 C23 C24 C26 C29 C30 C32 C33 C37 C40 C41 C43 C44 C47 C49 C52 C56 C58 C61 64 71 C73 74 84 C86 C89 C91 C92 C93 97 99 C101 C102 C105 C108 puo 154057 CAPACITOR 470pF 100V 10 POLYCARB c50 154058 CAPACITOR 022uF 63V 10 MTLZD POLY 154060 CAPACITOR 22uF 63V 10 MTLZD POLY c7 C87 C88 C90 C96 C100 154016 CAPACITOR 1 50V 1 SP DIPPED RADIAL 572515071 FUSE 1 10 125V FAST ACTING PLUG IN YY515072 FUSE 125V FAST ACTING PLUG IN T 35515511 FUSEHOLDER VERT 5 125V SILVER PLD FOR F1 F2 154065 CAPACITOR 1 63V 2 SP POLYESTER
22. Rear Feet Rubber tipped rear feet 2 Serial Output Connector Serial RS232 data output here for use with Tele Sat telemetry system optional analog output module and other RS232 interfaces A female 25 Figure 2 Rear and Top Panel Descriptions 11 pin connector serves as the interface connector Top Cover Carrying Handle Monitor carrying handle molded into case Warning Label Explosion and electrical shock warnings Patient Isolation Label The Model 520A is Type BF equipment Model 520A Service Manual 7 Summary of Operation This section summarizes the operation of the Model 520A Pulse Oximeter It is intended as a quick reference and refresher for persons who have thoroughly reviewed the Model 520A User s Manual PN 5693 23 Persons unfamiliar with the Model 520A should thoroughly examine the User s Manual before referencing the steps listed here l 8 520A Service Manual If powering the monitor from the AC line voltage Connect the line cord to the monitor and plug into a properly grounded 3 wire outlet Set the rear panel power Mains switch to the on position Press the front panel POWER key to turn the monitor on Verify the Message Center displays Connect SPO2 Probe after the self tests are complete Use the Menu System to modify the operation of the monitor to best suit your application The Menu System menus include ALRT softkey Use SE
23. QNHL 4 Jojueo NIVIA qasvuda 1 1 Q3NIV LHH 3SV3 d 1 ONISVH3 amp SQN3HL GAYOLS 3SVHH3 lt NO H3MOd 58 52 2045 194135 D m 3dON 194135 Z6 q94 Z 9JeM JOS 2 UOISIA H 99 1 NUS w H LT IdAXO SNOLLdO 9113 2095 u ji jeedde 40 ubnoiu 00 XX S LA ANA NIV TX 13S lQ 0 00 XX S LA nua TXX nu lN AWNIOA AS1Nd LAS NIVIN 351 Sadunivad olanv 135 NH BO uO 1461 ANS sej66o agyi SNOILdO WALSAS Lav Jejueo NANNAN NIVIA 46 994 1 2 UOISIA 9H 991 NU N w HLATdAXO NANNAN NIVIA lt GALYVLS LNOLNIYd A peioejes si eoepejut QHVOVAON seadde quyo dnjes eu ul pejoejes juo 1eedde 3215 pue 13534 XX 8015 LAS A
24. Saturation Sensor Extension Cable 4 feet Saturation Sensor Extension Cable 6 feet Saturation Sensor Extension Cable 10 feet Saturation Sensor Extension Cable 25 feet Saturation Sensor Extension Cable 50 feet Single Patient Use Pediatric Adult Sensor 10 per box Single Patient Use Pediatric Adult Sensor 25 per box Single Patient Use Neonatal Pediatric Sensor 10 per box Single Patient Use Neonatal Pediatric Sensor a 25 per box Sensor Extension Cable for use with Single Patient Use Sensors DB 9 connectors Eg q Sensor Jumper Cable for use with Single Patient Use Sensors DB9 to OxySnap connector EXTENDED WARRANTY Normal warranty Monitor 1 year Model 2001 warranty extended an additional 1 year s at time of purchase OXYPLETH warranty extended an additional 1 year s at time of purchase Model 515B warranty extended an additional 1 year s at time of purchase Model 515C warranty extended an additional 1 year s at time of purchase BIOMEDICAL EQUIPMENT amp TRAINING 5693 90 01 Model 520A Catalog No Description Service Test Kits include items and materials qualified service personnel may require to determine the functional integrity and or accuracy of the system 5777 00 Test Kit Pulse Oximeter 9999 96 focus Technical Training Seminar 1 day course For class schedules call 1 800 243 3444 Ext 2565 MOUNTING SY
25. AC Mains Operation inue Rd alte es eaa olore ant i 16 Battery ODBratiohizsc uoa a 16 2726 Power Supply Board acess 17 AC Mains and Battery Operation Overview 17 AC Mains Operation 17 Battery 18 2471 amp 2775 Main Board ad PR ee ERA 19 Power On Off Control Circuitry eese 19 Power Supplies 6 20 Voltage References passt 20 Preserving RAM and Real Time Clock Data 21 Model 520A Service Manual 5693 90 01 Contents 5 Jun 01 Low Battery Voltage Shutdown sse 21 TIMING Seguente 22 Data Sampling Controller r 22 Sensor LED Drive Circuits rasa 23 Sensor Photodiode Return 24 Calibrating the 20 Bit Analog to Digital Convertors 25 20 Bit Analog to Digital Conversion 26 Sensor Status Decoding and Conversion 26 Sensor Status 27 MiCrOpTOC S SOT 28 Memoiren
26. DC TO AC INVERTER SVDC INPUT 45 481031 DIODE ZENER B2x79 C7V5 7 59 500mw 012 180010 INDUCTOR iBuH 10 2 SP 48150 DIODE 1 4148 SILICON 06 011 014 016 018 DESCRIPTION REF DES yy 180011 FERRITE BEAD 22AWG THRU CORE 1 TURN FB 481534 DIODE SCHOTTKY BAT82 MINIATURE 00 34 013 D17 5180012 FERRITE BEAD FB2 FB3 47001 RESISTOR 22 OHM 1 4W 10 481541 _ DIODE UF4002 100V FAST RECOVERY Di 02 04 05 2471 02 BOARD MODEL 520A amp 515A SB Jg 47 o RESISTOR 33 OHM 1 2W 10 METAL FILM 481542 DIODE UF5400 50 FAST RECOVERY 03 D2471 03 SCHEMATIC MAIN BOARD MODEL 520A T A2471 04 TEST PROCEDURE MAIN BOARD MODEL 5204 __ 35210051 CONNECTOR 25 PIN RECEPTACLE R ANGLE 3101 _ 2471 28 MAIN BOARD KIT MODEL 5204 SEE COMPONENT CHART 75210097 CONNECTOR 16 PIN HEADER DIL STRAIGHT J103 year RESISTOR 100M OHM 1W 5 483002 TRANSISTOR 285906 PNP SILICON C2755 01 TONE GENERATOR REPLACEMENT BOARD ASSY FOR 1227 302112135 CONNECTOR 2 PIN MALE HEADER 105 109 AR 483017 TRANSISTOR BC214C PNP SILICON 01 04 5211412 CONNECTOR 4 PIN HEADER R ANGLE J106 3521414 CONNECTOR 4 PIN PLUG FRICTION LOCK J102 47220 RESISTOR 100 OHM 1 4W 1 R18 R27 R59 R63 C5711 10 TRANSFORMER MAIN BOARD T ALTERNATE 55211629 CONNECTOR 6 PIN PLUG SIL R ANGLE J108 4720 RESISTOR 475 OHM 1 4W 1 RI R2 R7 R20 R24 R25 TRANSISTOR
27. E MFG ENGR DATE MAIN BOARD ASSY T BOc199 US DRAWING NO CODE REV 5727 SEE TOLERANCES Xx 01 1254 6 5 4 3 2 1 NEXT ASSY xx 005 127 3 0025 064 TO SHEFTS 2 3 ANDA CONTROL BUS BLM31A501S VDD NMI BUSREQ CNTRST DISPCS D INTi 9 CPUINT e o M31A6018 Q A17 f 74 14 16 BLM31A601S WAIT BLI REF TEND1 TXS D1 CR cgogoococooo QNARKRAN A N VEC O 74HC14 D11 RP2 10k 1N4148 IC46A 74HC32 74HC32 zx 74HC14 C37 BLM31A601S q vcc O WAIT 9 of op CLKSEQ SPARES 74HC14 74HC14 R26 1k RPS 100k 74HC32 RP3 4HC14 100 C38 32768 C39 22p 22 RP11 74 14 aes 5 EX 74HC32 ____ SCHEMATIC MAIN BOARD 1 Ex 100 gt 520 amp 2001 Novametrix Medical Systems Inc RP6 RP41 1 Barnes Industrial Park Road 50900 Approved Document Number od R iDo 100 SApr00 Eng TC 07oct99 7Oct99 2775 amp 2775A 03 74HC32 File 27750304 By D Date Friday November 17 2000 CONTROL BUS LF353N IC38B R49 z J108 VA LF353N C82 He K35 vin amp YREF x TEMP 1 4
28. SOLDER SIDE OF PC BOARD ADD HOT MELT UNDER DESCRIPTION REF DES CAPACITOR 220uF 35V ELECTROLYTIC 152081 CAP 6800 35V 20 AL ELECTROLYTIC 154016 CAPACITOR 1uF 50V DIPPED CERAMIC C2 C3 C5 C7 o 180014 INDUCTOR 25uH L1 211215 CONNECTOR 2 PIN POST HEADER N J302 CONNECTOR 5 PIN POST HDR FRICTION LOCK 4501 470026 PESISTOR 150 OHM 1 40 10 472005 RESISTOR 249 OHM 1 40 1 472016 472022 RESISTOR 4 99k OHM 1 4W 1 472049 RESISTOR 49 9k OHM 1 4W 1 472058 RESISTOR 100k OHM 1 4W 1 R5 R7 R9 472065 RESISTOR 200k OHM 1 4W 1 472108 RESISTOR 37 4k OHM 1 4W 1 472146 RESISTOR 47 5k OHM 1 44 1 472140 RESISTOR 33Zk OHM 1 4W 31 472185 RESISTOR 61 8k OHM 1 4W 1 472270 RESISTOR 1 2 OHM 1 4 1 METAL FILM 474181 RESISTOR 4 3 OHM 1W 5 481022 DIODE ZENER BZYBBC12 12V 500mW 481530 DIODE KBU4D BRIDGE RECTIFIER 4 481541 DIODE UF4002 100 1 FAST RECOVERY 251542 VOLTAGE REGULATOR LM78LOSACZ 5V 100 484559 VOLTAGE REGULATOR LTID7BCT 2A T0 22D 485517 TRANSISTOR VN10KM N CHANNEL FET 485527 MOSFET IRF8523 OHMS GOV P CHANNEL 12 LM393N DUAL COMPARATOR 515046 FUSE 2 AMP 250V SLO BLO F301 FUSE 1 2 AMP 250V FAST BLO F302 NOTES 1 FOR TEST PROCEDURE SEE 2472 04 2 THE FOLLOWING COMPONENT 15 NOT FITTED IN THIS ASSEMB
29. The voltage rectified by D1 D2 and filtered by C2 is fed to IC2 as VCH Voltage Charge The output of this 5 volt regulator provides the LINEST Line Status signal to the main board at E302 pin 3 With AC applied LINEST is high LINEST goes low when the AC is disconnected The LINEST line is also routed to the power on off circuitry Battery Operation 9 2 3 Without AC power there will be no secondary voltage rectified by D1 Power for the monitor will be supplied from the battery at J302 pins 1 and 2 The battery power will conduct through D3 and F301 to VIN at E302 pin to the main board R2 and Q1A bias QIB off in this condition which prevents power from reaching IC2 and IC3 The output of ICI is also protected by D5 which is now reverse biased the bridge D is also reverse biased and prevents T301 from discharging the battery With no voltage at IC2 the LINEST will be low which indicates to the main board that there is no AC power 18 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 2471 amp 2775 Main Board 9 3 The Main Board contains all the analog and digital circuitry that controls the sensor external communication and front panel display The isolated power supplies microprocessor circuits and memory are all contained on this board The earlier 247 Main Board and newer 2775 Main Board are identical with exceptions noted in the text Power On Off Control Circ
30. in a 2 glutheralhyde solution or 10 bleach solution Refer to manufacturer s instructions and standard hospital protocols to determine recommended times for disinfection and sterilization Rinse thoroughly with water and dry before use do not rinse the connector Do not attempt to sterilize Y Sensor except as stated above After cleaning or sterilizing the Y Sensor verify that the sensor is physically intact with no broken or frayed wires or damaged parts Make certain that the connectors are clean and dry with no signs of contamination or corrosion Do not use a broken or damaged sensor or one with wet contaminated or corroded connectors Treat Y Strip Tapes and foam wraps in accordance with hospital protocol for single patient use items 5693 90 01 Battery Life and Maintenance 5 Jun 01 Battery Life and Maintenance 10 4 The monitor was shipped from the factory with a fully charged battery Since the monitor draws some battery power even while turned off it is recommended that the monitor be operated on line power for the first 24 hours to allow ample time for the battery to fully recharge The monitor may be operated on line power while the battery is recharging Approximately 16 hours are required to fully recharge a discharged battery During prolonged periods of storage or shipment the battery may discharge enough to prevent the unit from turning on while operated from battery power If this occurs plug in t
31. 00 Adapter Cable may be substituted for the TB500B in most parts of this test Monitor Accuracy Test 13 2 13 2 1 Equipment Required Model 5204 to be tested AC Mains Line Cord supplied with monitor TB500B Sensor Simulator Cat No 5530 00 13 2 2 Press and release the front panel POWER key The monitor will Briefly illuminate all displays and indicators Produce an audible beep indicating the audio is operational Briefly display MONITOR PERFORMING SELF TEST Display the Message Center flashes ERASE STORED TRENDS for ten seconds then displays CONNECT SPO2 PROBE while no sensor is con nected to the monitor 13 2 3 Press the Menu key and then press AVG The SELECT SPO2 AVERAGING menu should be displayed Press 2s and then press RUN to return to the Main Menu This sets the SpO averaging to 2 seconds for the quickest response to changing TB50OB settings 1 Available through the Novametrix Service Department 2 The AC indicator will illuminate only when the monitor is connected to line power and the rear panel Power switch is On 1 3 If Monitor Error appears turn the monitor off and back on If the message reappears contact qualified service personnel Refer to Section 11 Troubleshooting on page 47 Model 520A Service Manual 55 Section 13 Accuracy Test 13 2 4 13 2 5 13 2 6 13 2 7 13 2 8 13 2 9 13 2 10 13 2 11 13 2 12 13 2 13 Set the TB500B to these settings Powe
32. 1 The test verifies overall functional integrity of the monitor and sensors If the monitor or sensors do not pass these tests remove from use and contact the Novametrix Service Department for repair replacement assistance This procedure assumes the technician performs each step as indicated leaving the monitor 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 beofre continuing Monitor Functional Test 12 2 12 2 1 Equipment Required Model 520A to be tested AC Mains Line Cord supplied with monitor Finger Sensor Cat No 8776 or Y Sensor Cat No 8791 12 2 2 Visually inspect the monitor and line cord Verify there is no external damage Shake the unit to check that there is no loose hardware inside 12 2 3 Inspect the sensor s Verify mechanical integrity 12 2 4 Check the rear panel power entry module Verify that it is set to the proper voltage 12 25 Set the AC Mains switch to the 0 Off position Connect the line cord to the monitor and to the AC Mains 12 2 6 Verify the AC Mains indicator is not illuminated 12 2 7 Set the AC Mains switch to the I On position Verify the indicator illuminates 12 2 8 Depress and hold the ALERT RESET key Press the front panel POWER key then release both keys The monitor will Briefly illuminate all displays and indicators Produce an audible b
33. 1 COMPONENTS NOT FITTED Q1 R11 DO NOT SCALE UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES BREAK ALL SHARP EDGES TITLE TONE GENERATOR REPLACEMENT BOARD ASSY 02 TOLERANCES XX 01 XXX 005 FRAC t1 64 XXXX 0010 1 4 DRAWN BL MRL 5 98 26Feb98 MATERIAL N 40ct99 02 699 ct MFG ENGR TJC APPROVED RHD O1 Prod Release FINISH 26Feb98 2 Feb98 B sev r so oare USED ON SCALE 4 1 2 1 SIZE NOVAMETRIX MEDICAL SYSTEMS INC WALLINGFORD CT U S A 06492 DRAWING NO PE CODE REV SHEET 1 OF 1 A J1 QN OO h QN 0 01 O IC3 NC7S32 RDYL CEL AUDIO QUT IC2 LMC7101 VDD MRCLR OS1 CLKI OS2 CLKO vss vss RA0 RA1 RA2 gt 54529555 NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE VALUES ARE IN OHMS 1 16W 1 CAPACITANCE VALUES ARE IN FARADS 2 LAST REF DES USED IC3 J2 Q1 R12 3 COMPONENTS NOT FITTED IN THIS ASSEMBLY Q1 R11 Novametrix Medical Systems inc hecked MRL 5 Technology Drive 23Dec97 25 98 Wallingford CT USA 06492 Mfg Approved 125 Document Number TR v Eng TC 17 RHD 5FEB98 B 2755 02 F heet 1 Fev R Ne By Date Date T
34. 2 OF 2 MEMBRANE KEYPANEL OXYPLETH 520A NOVAMETRIX MEDICAL SYSTEMS INC WALLINGFORD CT U S A 06492 SCHEMATIC DIAGRAM 511 amp S12 ARE ALLOWED FOR IN THE CIRCUITRY BUT ARE NOT USED FOR THIS KEYPANEL Thie document contains information which of Novametrix ITEM 6 REF SEE WIRING DIAGRAM FOR CABLE CONNECTIONS CONNECT P301 FROM PM301 J301 ON PWR SUPPLY BD PLACE 1 HEX NUT BETWEEN EN GROUND LUG 3 PL ITEM 13 REF INSTALL GROUND WIRE USING THIN HEX NUT SOLDER GND WIRE ITEM 5 REF TO PM301 GND ITEM 1 REF INSTALL GND WIRE FROM PM301 ON GL301 FIRST APPLY DROP OF ADHESIVE TO BUSHING STUD ITEM 22 BEFORE A ieee MIR SECURING BUSHING REAR PANEL 13 SEE DETAL INSTALL GND WIRE FROM 2 PL USE THICK HEX NUT amp STAR GL303 ON GL301 SECOND WASHER TO MOUNT GL303 GL303 UL RS232C NOVAMETRIX ACCESSORIES CAUTION FEDERAL U S A LAW RESTRICTS THIS DEVICE To SALE DISTRIBUTION OR USE BY OR ON er PUSE ICAL PRACTITIONER THE ORDER OF A LICENSED MED 05 Sa Oy 00 120 CAUTION EQUIPMENT MUST BE GROUNDED AT ALL T250mA 2 200 24N TIMES 19 AVOID DANGEROUS ELECTRICAL SHOCK PATENTS 5 190 038 5 306 680 NOTE ORIENTATION OF SPACER 2 PL POWER SUPPLY BOARD D2726 01 REAR PANEL O GL303 GRN YEL D GL301 GL201 O WIRING DIAGRAM rso Jase weezy gt r Zsz SEE DETAIL FOR PRE
35. Alert Bar P108 Sensor P104 Keyboard P106 Backlight P103 Display Figure 9 Monitor Assembly 3 Unplug P102 The Power Supply connector from the 2471 Main Board disconnect P109 Speaker P108 Sensor P104 Keypanel P106 Backlight P105 Alert Bar and P103 Display Unscrew 2471 Main 42 Model 520A Service Manual 5693 90 01 Assembly Exchanges 5 Jun 01 Battery Connection to Power Supply P302 Board from the rear panel Remove the front Bezel assembly then slide the 2471 Main Board out the 2472 Power Supply Board and Battery should be exposed 4 The separate sections of the monitor can now be removed Z Power Supply Board Sa Battery q INQ 1 SpO2 Input Assy Figure 10 520A Assembly with 2471 Main Board Removed IMPORTANT The battery is connected to the Power Supply Board through connector J302 Before attempting to apply power to the monitor ensure all connections are properly made then connect the AC mains and turn the PEM switch to I ensure that the u on the front panel illuminates before powerin
36. Catalog No 8791 60 8776 36 8776 60 8828 00 8829 00 8831 00 8832 00 6929 00 6968 00 8836 00 8943 00 6131 50 6131 25 8700 00 5963 00 9622 01 6045 00 5333 00 2736 00 6659 00 Description Y 60 Plan The Plan length is 60 months Includes 15 boxes of any Y Strip Taping Systems Finger 36 Plan The Plan length is 36 months Finger 60 Plan The Plan length is 60 months Y SENSOR APPLICATORS 20mm Wrap Style Taping System 100 per box Use on neonatal foot and hand or on pediatric toe or finger a 25mm Wrap Style Taping System 100 per box Use on neonatal foot and hand color coded green 20mm Finger Style Taping System 100 per box Use on pediatric finger or on small adult finger color coded bu 25mm Finger Style Taping System 100 box Use on adult finger color coded green Adhesive Foam Wraps Large 25 per box Adhesive Foam Wraps Small 25 per box Non Adhesive Foam Wraps Large 25 per box Non Adhesive Foam Wraps Small 25 per box Ear Clips 5 per box Ear Clips 25 per box TE Adhesive Dots 200 per box OUTPUT OPTIONS ANALOG DIGITAL amp PRINTER Analog Output Module for Model 2001 VOYANT Analog Output Module for OXYPLETH includes RS232 pass thru Cable for 5963 00 Analog Output Module open ended 6 ft w Cable for 9622 00 Analog Output M
37. Entry Module PEM 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 card The filtered switched and fused output of the Power Entry Module is fed to the primary coils of the rear panel mounted system transformer T301 The secondary output from T301 is rectified by D1 bridge rectifier and filtered by loaded DC voltage at this point is approximately 20 volts The 20 DC volts is fed to the 2471 main board through fuse F301 to connector E302 and is switched to the battery charging regulator pin 5 through 01 Biasing for 01 is accomplished by D2 and R2 when AC power is applied When running on battery power 1 is biased off by R1 R2 and D3 this prevents the battery from trying to power the battery charger regulator and IC2 that informs the monitor of the loss of AC The output of switching regulator 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 except for fast charge which is regulated 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 120mA of current IC3 pin 7 goes high which biases Q2 on this in turn short
38. IC17 pin 1 is inserted into pin 1 of the socket 4 Reverse the above steps to reinstall the assembly into the monitor 5 Jun 01 Model 520A Service Manual 45 Section 10 Maintenance This page intentionally blank 46 model 520A Service Manual 5693 90 01 5 Jun 01 1 1 Troubleshooting Fault alert and error messages that can appear on the Model 520A Message Center display are described below Paragraphs marked with a are intended for qualified service personnel only Message Center Display AUDIO OFF DISABLED Possible Explanation Displayed if user tries to enable Audio Off mode by press ing and holding the AUDIO key while the Allow Audio Off portion of the Options Menu is set to No BAD SIGNAL TIMEOUT Monitor not receiving valid signals from sensor May be caused by excessive motion cardiac arrhythmia or other situ ations leading to poor signal Check patient status reposition sensor BATTERY EXHAUSTED CONNECT LINE CORD Monitor is running on battery power and the battery power has been depleted Connect line cord to AC Mains power source and set the rear panel switch to I t Monitor s rear panel fuse has blown monitor switched over to battery power and has depleted battery life CAN T I D PROBE Sensor is placed on too thick of a site Reposition the sensor on a thinner less opaque section of tissue A non SuperBright M sensor is connected use only 87xx series sen
39. Model 520A electronics by four opto isolators IC3 IC6 See sheet 5 on 2471 schematic sheet 4 on 2775 schematic An isolated secondary coil from transformer is rectified and filtered by D1 and before being input to the 5 volt regulator IC2 The regulated 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 Telemetry transmitter The supply also powers The Dual RS232 Transmitter Receiver IC1 uses a single 5 volt supply pin 16 The two Receive Rx inputs can accept 30 volt levels while the two Transmit Tx lines output 9 volt levels The four level translators within the chip turn the RS232 level signals to 5 volt TTL CMOS compatible levels Two signals lines TXO and TX1 transmit data from the CPU across the opto isolators ICs 3 and 4 to IC1 Here the signals are level shifted to the standard 0 volt levels and sent to the rear panel connector When the CPU brings the signal at R62 Low the LED portion of IC3 becomes forward biased and illuminates and causes the transistor portion of the device to conduct Therefore when is Low ICI pin 11 is Low and when is High 1 1 pin 11 is also High four opto isolators work in the same way ICI level shifts its input at pin 11 and outputs RS232 standard 9 volt levels at the TX signal at J101 pin 3 This transmit signal is used to output data to RS232 devices including the Hewlet
40. OXYPLETH off and remove line cord before cleaning it Do NOT use a damaged sensor or one with exposed electrical contacts Refer servicing to qualified service personnel Do not operate OXYPLETH when it is wet due to spills or condensation Do not operate OXYPLETH if it appears to have been dropped or damaged 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 monitor fails to respond as described do not use it until the situation has been corrected by qualified personnel Patient Safety Care should be exercised to assure continued peripheral perfusion distal to the SpO sensor site after application Data Validity Inaccurate SpO and or Pulse Rate measurements be caused by any of the following Incorrect application or use of a sensor Significant levels of dysfunctional hemoglobin 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 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 ra
41. Printer Turn the printer on first then turn the Model 520A on 4 Select Seiko from the Ser Serial portion of the Model 520A Monitor Options 2 Menu 5 Referto the Seiko Model DPU 41 1 documentation for further printer details Analog Output Module 15 5 The optional Analog Output Module Catalog Number 9622 01 provides the necessary analog output voltages for use with analog instruments such as strip chart recorders The Model 520A does not directly support analog devices The Analog Output Module attaches to the connector on the rear panel of the Model 520A and provides analog output voltages via a 9 pin connector and RS232C pass through via a 25 pin connector so that both analog and serial devices can be used simultaneously Two screws supplied with the module are passed through the module and screw into the pre tapped holes in the rear panel of the Model 520A to secure the Analog Model 520A Service Manual 69 Section 15 Connecting to other Equipment NOVAMETRIX MEDICAL SYSTEMS INC Figure 17 Analog Output Module Output Module in place The pinouts of the 9 pin analog and 25 pin RS232C connector are shown below SAT GNDI PR Pin 1 Pulse Rate 4mV bpm 0 1V 2 3 GNDI Interface ground w Pin 4 5 Saturation 10mV 0 1V Pin 8 9 Plethysmogram 0 1V Auto Gain Control PLETH CTS TX Pin 2 RX Receive In Pin 3 TX Transmit Out Pin 6 CTS Clear To Send input P
42. Red LED in the sensor 15 also off The Infrared LED drive circuit operates in the same manner as the Red LED drive discussed above The IRLED signal at IC42 pin 17 activates 013 the LED2S signal causes a positive signal at IC36 pin 14 and current can flow from the LEDSRC supply through the sensor s Infrared LED Q12 and the current limiting R52 to ground Sensor Photodiode Return Path 9 3 9 Light from the sensor s Red or Infrared LED shines through the pulsating vascular 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 IC40 pins 1 3 is 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 voltage at IC40 pin The voltage at IC40 pin 1 is presented to an analog switch IC41 pin 6 This switch is controlled at pin8 by INSIG Input Signal from 42 and will be closed 1 41 pins6 and7 connected except if the monitor is in a Probe Off Patient condition or is undergoing its Self Test at system power up The switch IC41 pins 9 11 controlled from SIGND Signal Ground at IC42 will be open no connection between IC41 pins10 and 11 except as noted above for the switch at IC41 pins 6 8 As a result the 1 40 pin 1 voltage passes undisturbed to the high pass filter cons
43. This procedure assumes the technician performs each step as indicated leaving the monitor 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 Equipment Required and Test Setup 14 2 14 21 Model 520A to be tested AC Mains Line Cord supplied with monitor TB500B Sensor Simulator Cat No 5530 00 or TB500A Sensor Simulator and Adapter Cable 5453 00 RS232 test fixture PN 5479 01 Saturation test jack PN 5942 00 Digital Voltmeter Small Flat blade screwdriver 14 2 With the Model 520A Off Disconnect any line cord and sensor from the monitor 1 Available through the Novametrix Service Department 2 The 5 used in conjunction with the Cat No 5453 00 Adapter Cable may be substituted for the TB500B in most parts of this test Model 520A Service Manual 59 Section 14 Calibration Tests 14 2 3 Flip the monitor over to expose the bottom cover and remove the four cover screws Holding both the top and bottom halves together flip the monitor over again and set it on its bottom cover 14 244 Liftthe top cover from the monitor and set it aside Set the Red Alert Bar lens aside with the cover for safe keeping Test Procedure 14 3 Unless otherwise specified all measurements are with respect to isolated ground Use the top of R4 end closest to IC2 as ground reference 14 3 1 14 3 2 14 8 3
44. ZTX109C NPN Q9 C5712 10 TRANSFORMER MAIN BOARD 9212501 CONNECTOR 20 PIN 1 0 HEADER J104 AT RESISTOR 1k OHM 1 4W 1 R8 R9 R15 R26 R34 YT 484515 VOLTAGE REGULATOR 1 531712 POSITIVE ADJ IC32 A5715 07 PROGRAM EPROM ASSY 5002 30212529 CONNECTOR 20 PIN HEADER STRAIGHT 1107 47202 RESISTOR 4 75k OHM 1 4W 1 R16 484523 VOLTAGE REGULATOR LM79LOSACZ 100mA NEG IC43 B5833 01 GROUND WIRE ASSY MAIN BOARD OXYPLETH FOR GL302 47203 RESISTOR OHM 1 4W 1 R22 R29 R30 R60 R62 VOLTAGE REGULATOR 1 78105 2 5V 100mA IC44 47203 RESISTOR 12 1k OHM 1 4W 1 R19 VOLTAGE REGULATOR 78 05 45V 500mA 162 47205 RESISTOR 13 7k OHM 1 4W 1 R45 R50 VOLTAGE REGULATOR LP2950ACZ 5 0 ADJ 1612 6266 04 TEST PROCEDURE ATE FOR 2471 amp 2474 37215031 SOCKET IC 20 PIN LOW PROFILE FOR IC42 1 18 47204 RESISTOR 20k OHM 1 4W 1 R37 R38 YA 484534 VOLTAGE REGULATOR LM79L12ACZ 12V DC A6266 57 PROGRAM DISK ASSY FOR 2471 amp 2474 ATE 37215055 SOCKET 1c B PIN DIL 3 DIP SP OPEN FRAME FOR 1 40 472055 RESISTOR 100k OHM 1 4W 1 R12 R33 R43 R44 56 858 57484535 VOLTAGE REGULATOR LM7BLI2ACZ 12V DC 86328 14 ATE FIXTURE 2471 amp 2474 ASSEMBLIES 37215060 SOCKET ic 32 PIN DIP 6 SPACING FOR Ic17 472063 RESISTOR 162k OHM 1 4W 1 R32 1485520 TRANSISTOR MOSFET 85250 P CHANNEL Q6 Q8 86332 01 SAO2 TEST JACK ASSY ATE TEST 472 05 RES
45. amp 2775 Main Board 5 Jun 01 The backlight for the display is controlled by the DSPBR Display Bright line When DSPBR is high the gate of Q16 is biased off current flows from Vcc through R51 to IC45 This sets the backlight for low illumination The illumination of the backlight is made greater when DSPBR is made low this biases Q16 on which essentially shorts out R51 allowing more current to flow into IC45 creating a full backlight Device Controller 9 3 20 The A D Converter Chip Selects serial A D Chip Selects Sensor Status Decoding and line are all controlled by IC28 when selected by the OPOR T line IC21 10 The OPORT line will go high when the L1 and WR line both go low at IC23 pins 13 and 12 this will send output pin IC23 pin 11 low which drives inverter IC21 pin 10 high enabling IC28 A 3 to 8 decoder 15 used to control the DACCS RTC DISPC AUD KEYS L1 L2 2KEYS lines when the IOE line goes low and the LIR line goes high being inverted by IC21 pin 2 and presented to IC22 pin 5 as a low enable line IC22 is enabled Q0 Q7 will be driven low depending upon the A4 A5 and A6 lines on pins 1 2 3 respectively on IC22 With the LPORT line high IC13 is enabled this latches the data on lines DO D7 1D 8D pins 2 9 on its output pins 19 12 1Q 8Q respectively the outputs correspond to the following eight lines CAL used by the A D Convertors on power up to compensate for front end voltag
46. i 05 VCC UF4002 8 0224 15095 C 8 seti in 4013 44 29 0 1 8 147 al RP4 D em UC3843 Bil ws e n COMP 22 1 54 ae S OPTOCOUPLER 1 d R19 CS 22 1k R25 IC4 gt R C 415 CNY1 GND ISEN 5 1 SYNC 475 R4 485 LRE VBACK 8 339 0 332 0 33 RPS OPTOCOUPLER O 1 2W 1 2W 172W 100 155 CNY17 6 B 5 180k R62 10k 03 7 BC214C RPS OPTOCOUPLER C28 166 35V 2 2uF E CNY17 R61 rg 10k a RPS BC214C igi ONNOFF 27 08 R20 ICIL 18Qk 1N4148 415 VBACK vec 4093 8 12 C24 BAT82 8 1uF D18 UNLESS OTHERMISE SPECIFIED N GUT 18 57 3Jun98 DIMENSIONS ARE IN INCHES om OFFDIS Pe958AG g BREAK ALL SHARP EDGES icii 7 4093 57 27 98 54 D7 9 RP4 TANT C22 GND L C27 2656p97 MATERIAL 1e 403 1340996 crus FILE 24718311 45 N348 135ep94 DATE 12 Aug 99 REV FR DATE TIME 17 40 59 8 7 6 5 i 4 3 ISOLATION BARRIER 6 RIIN 13 ROIL 9 LT 23 14 3 2 I 4 c5 MAX232CPE 1guF 16 RiouT L3 TANT 4 4 c6 18 16V 5 TANT 1 O O 01 202 14 IN Z SPARES 8 RP6 108k NOVAMETRIX A
47. or Model 315 Printer Analog Recorder Output Module Optional Provides analog output for strip chart applications at the following levels Oxygen Saturation value 10 1 10096 1 V Pulse Rate value 4mV bpm 250 bpm 1 V Plethysmograph pulse waveform 0 1V max AGC 5693 90 01 Additional Features 5 Jun 01 Serial RS232 Data Output Provides RS232 data interface compatible with Seiko DPU 414 Thermal Printer Seiko DPU 411 Thermal Printer Hewlett Packard ThinkJet Printer Novametrix Model 315 Printer Novametrix Model 1260 Capnograph Novametrix Model 1010 Telemetry Central Station 5 monitor RS232 computer interface NOVACARD Memory Module NOVACOM Interface nternal Real Time Clock Alert Bar Model 520A Service Manual 75 1 Accessories Model 520A 17 1 Catalog No 8793 00 8744 00 8853 00 8898 00 8776 00 8791 00 9768 00 9168 00 9769 00 9169 00 8791 36 76 Model 520A Service Manual Description SuperBright SpO SENSORS OxySnap Y Sensor use with OxySnap Extension Cable 90 day warranty OxySnap Finger Sensor use with OxySnap Extension Cable 1 yr warranty OxySnap Extension Cable use with OxySnap sensors 8 feet 1 yr warranty OxySnap Extension Cable use with OxySnap sensors 12 feet 1 yr warranty SuperBright Finger Sensor 10 ft sensor cable 1 yr warranty SuperBright Y S
48. required 5 Position the housing into the power entry module so that the desired voltage is furthest away from the switch see below E Set for 100 120V operation Set for 2 6 Close the fuse access door and verify that the p is displayed Line operating voltage 00 240V Operation roper mains operating voltage p 230 c p AC Mains on older style assemblies 10 5 3 The Model 520A will operate on line voltages of 100 120 220 or 240 VAC 10 at 50 60 Hz At 100 120 VAC two 0 5 Amp 250 Volt Slo Blo time delay Mains fuses are required while Two T 250 mA 250 Volt fuses are required when operating at 220 or 240 V AC For continued protection against fire hazard replace only with fuse s of the same type and rating The rear panel Power Entry Module PEM houses the AC Mains fuses and is where the input voltage is selected It also houses the AC Mains Power switch set to AC Mains power is presented to the internal circuitry set to the 0 position power does not pass through the 5 Jun 01 Model 520A Service 39 Section 10 Maintenance Replacing the AC Mains Fuse s 10 5 4 1 Turn off the Model 520A Set the rear panel AC Mains power switch to 0 and disconnect the line cord fr
49. the duty cycle of the pin 6 output will vary with the load on the transformer Current flow in the transformer primary induces current in the three secondary coils and creates the 12 volt analog supplies V12 and V12 the VRAWI that powers the isolated RS232 circuitry and the 5 volt VCC supply that power the remaining circuits in the monitor The Model 520A turns on The V12 and V12 supplies are rectified and filtered by D2 D4 C10 C11 C12 and C13 The 12 is regulated by and the V12 by IC8 The VDD supply is rectified by D3 filtered by L1 C9 and C20 and fused at and in addition a feedback loop to IC9 contains which is factory adjusted to produce a 5 00 volt 0 05 volt VCC supply measured under load Once the monitor powers up a SYNC signal toggles Q9 on and off causing a timing pulse to be transmitted across C19 and C15 to the input at 9 pin 4 This has the Model 520A Service Manual 1 9 Section 9 Electronic Theory of Operation effect of synchronizing the output of the pulse width modulator with the data sampling operations of the analog board and keeps power supply switching spikes from interfering with those operations Power Supplies 9 3 2 The secondary pins 7 8 9 of T1 form a center tap transformer the voltage is rectified by D2 and D4 then filtered by C10 C11 C12 and C13 The dual 12 volt supplies 12 and V12 which are generated from this voltage are regulated by IC7 and IC8 re
50. 0 Sp CifiCatiOnS C 73 G n ral cec cete 73 Oxygen Saturation SpO2 Section 73 Pulse Rate Section eene 73 General 2 0 74 Additional Features nsu htc epa i ws 74 ACGOSSOF IOS sisse ER RR QN esa I GR AT E A 76 Model 520 5 ere reve rtt E En eger Fx tera 76 81 xc AUI LUE 81 5693 01 MAIN 5 488 81 6538 01 REAR PANEL ASSY 82 5673 01 REAR PANEL ASSY 82 2726 01 POWER SUPPLY BD ASSY 83 2472 01 POWER SUPPLY 84 5719 01 FRONT PANEL ASSY 85 2473 01 ALERT BOARD ASSY 85 5720 01 DISPLAY ASSY tete e deu Le nen 85 5713 01 SPEAKER ASSY i n ERU gs 85 5714 01 BATTERY HARNESS ASSY 85 5728 01 CABLE ASSY kisu u uska sas usa Sa 86 5765 01 TOP COVER 55 86 5766 01 BOTTOM COVER 9 86 V Model 520A Service Manual 5693 90 0
51. 01 04 820 MAIN BOARD ASSEMBLY 520A D5693 01 2775 01 04 20 MAIN BOARD ASSEMBLY 2001 09400 01 This document contains information which is proprietary and the property of Ncvometrix Medical Systems Inc and may not be reproduced used or disclosed in whole or In part without the written consent of Novornetrix Medical Systems Inc DO NOT SCALE DRAWN DATE wars NOVAMETRIX DIMENSIONS ARE IN INCHES mm MEDICAL SYSTEMS INC ees 01 254 ms EN 02 Re 01 8019 2775 01 Ts rev NEXT ASSY SEE 3 2 1 A B C D E NEXT ASSY MAIN BOARD ASSY F817 2816 FB15 2 re DRAWING TABULATION DWG NO REV TITLE 02775 01 04 820 MAIN BOARD ASSEMBLY 520A 05693 01 2775 01 04 820 BOARD ASSEMBLY 2001 09400 01 This document contains information which is ond the property of Novametrix Medical Systems Inc and may not be reproduced used or disclosed in whole or in part without the written consent of Novametrix Medical Systems Inc DO NOT SCALE DRAWN DATE P NOVAMETRIX UNLESS OTHERWISE SPECIFIED B Lencaster 29499 DIMENSIONS ARE IN INCHES mm MEDICAL SYSTEMS INC
52. 05065 WIRE 26AWG PVC INS 0 012 605064 WIRE 26AWG PVC INS 0 002 161060 EPOXY 2 PART 5 7 0 005 211630 CONNECTOR 6 PIN 1 009 605060 WIRE 26AWG PVC INS 0 016 608011 TUBING HEAT SHRINK 0 002 161110 EPOXY 2 PART 1 1 0 017 9779 33 ASSY PROC EPOXY MIX 0 5765 01 TOP COVER ASSY 18 13 Seq Item Nbr Description Qty 005 5862 10 SHIELD MYLAR 1 001 5765 13 TOP COVER 1 002 5827 32 WARNING LABEL 1 004 5823 32 LABEL INSTRUCTIONS 1 003 5828 32 LABEL ISOLATION 1 5766 01 BOTTOM COVER ASSY 18 14 Seq Item Nbr Description Qty 016 161007 ADHESIVE 0 010 284261 SCREW 4 40 X 5 8 L 0 009 4727 10 KICKSTAND BEDRAIL 1 005 5826 10 FOOT PAD 4 003 5766 13 BOTTOM COVER 1 015 284264 SCREW 4 40 X 1 4 L 0 011 161064 TAPE 3 4 X 60 YDS 0 012 5405 10 SHIELD BATTERY 1 5693 90 01 86 Model 520A Service Manual 2755 01 TONE GEN REPL BOARD Seq Item Nbr Description Qty 007 5760 16 LEFT FOOT WHITE 2 008 5761 16 RIGHT FOOT WHITE 013 5849 10 BRACKET SUPPORT 002 5409 32 LABEL WARNING POLE 1 006 315052 LABEL EARTHING SYMB 13 2755 01 TONE GEN REPL BOARD 18 15 Seq Item Nbr Description Qty 022 486358 IC NC7SZ32MS 2 IN 1 018 474241 RESISTOR 150K OHM 1 023 486825 IC LMC7101BIM5X 1 020 474300 RESISTOR 402K OHM 1 014 474228 RESISTOR 1 21K OHM 1 001 2755 02 FAB TONE GENERATOR 1 017 474240 RESISTOR IOOK OHM 3 012 474197 RESISTOR 49 9K OHM 1 013 474224 RESISTOR 100 OHM 1 011 21
53. 1 Contents 2755 01 TONE GEN REPL BOARD netto rre eei 87 2775 01 MAIN BOARD ASSY ic tg no quitte Or Se 87 2471 28 MAIN BD part of 2775 01 sse 89 2471 01 MAIN BOARD ASSY ebur ra Led 91 Schematic and Assembly 93 Notes TCR 95 5 Jun 01 Model 520A Service Manual vi List of Figures Figure 1 Front Panel Description 6 Figure 2 Rear Top Panel 7 Figure 3 Figure 1 Front End 23 Figure 4 Power Entry Fuse Access Door 40 Figure 5 Fuse Removals soin eite e reta eve 40 Figure 6 Power Entry Module Voltage Selector Drum Remowval 41 Figure 7 Power Entry Module Voltage Selection Adjustment 41 Figure 8 Removing the Top 42 Figure 9 Monitor Assembly eee teer beue ned 42 Figure 10 520A Assembly with 2471 Main Board Removed 43 Figure 11 Changing the System Software 45 Figure 12 Softkey Identification sauna 54 Figure 13 Connecting the ThinkJet Printer
54. 1 000 515072 FUSE 1A 125V 1 000 487065 IC UC3843N CURRENT 1 000 400035 INWERTER DC TO AC 1 000 210051 CONNECTOR 25 PIN 1 000 180011 FERRITE BEAD 22 AWG 1 004 487053 IC AD712JN DUAL BI 2 004 486717 LF353N 2 5693 90 01 2471 01 MAIN BOARD ASSY 2471 01 MAIN BOARD ASSY 18 18 Seq Item Nbr Description Qty 067 472121 RESISTOR 3 74K OHM 1 153 483017 TRANSISTOR BC214C 4 082 474032 RESISTOR 10 OHM 1 062 472041 RESISTOR 20K OHM 2 064 472063 RESISTOR 162K OHM 1 073 472200 RESISTOR 5 6 OHM 1 130 487064 IC 17 PHOTO 4 151 154058 CAPACITOR 022UF 1 057 472011 RESISTOR 1K OHM 5 083 474089 RESISTOR PACK 2 009 6344 07 PROGRAM EPROM ASSY 0 085 474131 RESISTOR PACK 10K 1 149 472255 RESISTOR 1 OHM 2 032 154065 CAP 1UF 63V 5 150 486255 IC SN76496AN 1 011 152040 CAPACITOR 2 2UF 3 056 472007 RESISTOR 475 OHM 6 002 2471 03 SCHEMATIC MAIN BD 0 058 472021 RESISTOR 4 75K OHM 1 004 5715 07 PROGRAM SPO2 520A 1 001 2471 02 FAB MAIN BOARD 1 020 153003 CAPACITOR O1UF 1 070 472193 RESISTOR 23 7K OHM 1 094 481541 DIODE bOy 1A 4 090 475034 POTENTIOMETER 2K 1 096 483002 2N3906 PNP SILICON 1 063 472058 RESISTOR IOOK OHM 7 155 153062 CAPACITOR 15OPF 3 152 154060 CAPACITOR 22UF 1 092 481501 DIODE 1N4148 SIGNAL 10 080 472274 RESISTOR 26 7 OHM 1 066 472105
55. 14 3 4 14 3 5 60 520A Service Manual Attach line cord and place the mains switch to the position Verify that the green LED on the front panel illuminates The monitor may power up when the Mains switch is set tol if this occurs turn the monitor off with the front panel button Measure the voltage at J102 2 and verify 13 2 VDC 0 4 volts This voltage is dependent on a fully charged battery installed If an installed battery is less than fully charged the measured voltage will not match the expected voltage Simultaneously press the leftmost softkey and the power button While Calculating Checksum is displayed press and hold the third softkey from the right until Novametrix Inc Production Test appears Measure the voltage at TP Verify 5 000 50mV Adjust if necessary Verify the following voltages Location Signal Name Voltage IC40 pin 4 12 00V 500mV IC40 pin 8 TVA 12 00V 500mV IC20 pin 28 VBACK 4 75V 250mV IC37 pin 14 V5 5 00V 250mV IC37 pin 7 V5 5 00V 250mV IC37 pin 10 VREF 2 500V 5m V IC36 pin 1 4VREF 4 045V 50m V IC30 pin 14 4 4 045V 100mV 5693 90 01 Test Procedure 14 8 6 Short out capacitor C90 by installing a jumper wire from R59 to R56 Back of Unit 247 2775 Bd Component Side Front of Unit 14 8 7 Connect the RS232 test fixture to J101 and the saturation tes
56. 16 38 05 USED 12473 01 SCALE NONE SHEET 1 OF 1 e e c 1 This document contains information which is prietory ond the property of Novometrix Medicol Systems lnc and may not be reproduced used or disciosed in whole in part without the written consent of Novametrix Medical Systems Inc SW GND POWER AUDIO 2 MIN ALERT RESET AUDIO OFF MENU ALERT MENU LOW BATTERY MENU AC ON MENU LED GND CONTRAST EVENT MENU SPARE SPARE RFI GND 18 20 P2 m gt 220 m 1 4W 10 R2 220 OHM 1 4W 10 R3 220 OHM 1 4W 10 R4 220 OHM 1 4W 10 MENU R5 100 OHM wA a er _ O O O AC ON 57 1 4W 10 O O lt 159 CONTRAST 59 O EVENT 2 S8 O MENU 4 X S11 O O 19 s 512 O b E sas RFI SHIELDING DG NOT SCALE UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IN INCHES mm BR ALL SHARP EDGES ere el FRAC mm HOLES 4 007 003 4 18 08 DRAWN MRL CHECKED e mem ur sur DRAWNG NO CODE REV ns ps pem D 5676 USED ON 05719 01 SCALE NONE SHEET
57. 1814 CONNECTOR 8 PIN 2 010 154104 CAPACITOR O1UF 4 002 2755 03 SCHEM TONE GEN REPL 0 003 9074 07 IC TONE GENERATOR 1 016 474235 RESISTOR 24 9 OHM 2 019 474270 RESISTOR 200K OHM 1 011 211815 CONN 8 PIN HDR 2 2775 01 MAIN BOARD ASSY 18 16 Seq Item Nbr Description Qty 000 472121 RESISTOR 3 74K OHM 1 000 483017 TRANSISTOR BC214C 4 000 474032 RESISTOR 10 OHM 1 000 472041 RESISTOR 20K OHM 2 000 472063 RESISTOR 162K OHM 1 000 472200 RESISTOR 5 6 OHM 1 000 487064 IC 17 PHOTO 4 000 154058 CAPACITOR 022UF 1 000 472011 RESISTOR 1K OHM 5 000 474089 RESISTOR PACK IOOK 2 000 474131 RESISTOR PACK 10K 1 000 211306 CONNECTOR 3 PIN 1 000 180033 EMI FILTER 22PF 1 000 472255 RESISTOR 1 OHM 2 000 154065 CAP 1UF 63V 5 000 152040 CAPACITOR 2 2UF 3 000 472007 RESISTOR 475 OHM 6 000 154081 CAPACITOR 100PF 5 5 Jun 01 Model 520A Service Manual 87 Section 18 Parts Lists 88 Model 520A Service Manual Seq Item Nbr Description Qty 000 472021 RESISTOR 4 75K OHM 1 000 210144 JUMPER 2 POSITION 1 000 153003 CAPACITOR O1UF 1 000 472193 RESISTOR 23 7K OHM 1 000 481541 DIODE bOy 1A 4 000 475034 POTENTIOMETER 2K OHM 1 000 483002 2N3906 PNP SILICON 1 000 472058 RESISTOR IOOK OHM 7 000 154060 CAPACI
58. 500B from the monitor return the Sensor Type switch to 87xx and then plug it back in Verify the displays and Pulse Activity Bar return Press and hold the AUDIO key until the Audio Off indicator illuminates This will keep the monitor silent for the remainder of the test Verify the displayed SpO value is within the tolerances stated below for each setting of the Signal Attenuation and Saturation switches Verify a Pulse Rate of 60 bpm for all switch settings Note that alert 4 The 5453 00 Adapter Cable is used instead of the Sensor Type switch for the TB500A 5 If using a TB500A disconnect the Adapter Cable and plug the TB500A directly into the Model 520A The Message Center should display INCOMPATIBLE PROBE Install the Adapter Cable between the TB500A and the Model 520A and move on to the next step 56 520A Service Manual 5693 90 01 Monitor Accuracy Test messages will be generated and displayed as the saturation value violates the alert limit settings TBSO0B 520A 520A SpO SAT ATTEN SpO w TB500A 100 3 I 991 9 92 2 9242 82 822 8442 7 3 2 7742 62 62 2 6952 100 7 99 1 99 1 9 7 9 4 9244 82 7 84 4 2 77 4 60 7 NA Table 3 SpO2 Display tolerances for TB500B settings 13 2 14 Press the Menu key and then press AVG Press the appropriate key to return the averaging to its pretest value Press RUN to return
59. 542 DIODE UF5400 1 000 215060 SOCKET IC 32 PLN 1 Model 520A Service Manual 89 Section 18 Parts Lists 90 520A Service Manual Seq Item Nbr Description Qty 000 230006 CRYSTAL 3 2768MHZ 1 000 152084 CAPACITOR 470UF 2 000 230018 CRYSTAL 12 288MHZ 1 000 486268 IC DG444DJ SPST 1 000 486305 MSM6242BRS CMOS 1 002 153013 CAPACITOR 33PF 3 02A 153013 CAPACITOR 33PF 1 000 210097 CONNECTOR 16 PIN 1 000 230016 CRYSTAL 32 768K HZ 1 000 486600 CD4O13B 1 000 484531 VOLTAGE REGULATOR 1 000 486285 IC HD64180R1P6 1 000 515071 FUSE 1 10A 125V 1 000 180010 INDUCTOR 18UH 1 003 153012 CAPACITOR 22PF 4 03A 153012 CAPACITOR 22PF 6 000 212501 CONNECTOR 20 PIN 1 000 486675 MM74HC14N IC CMOS 2 000 486685 IC DUAL 8 BIT 1 000 486256 IC KGTO8O8C1D DB7O 1 000 485529 TRANSISTOR VNO610L 7 000 154057 CAPACITOR 470pF 1 000 485527 MOSFET 1RF9523 1 000 211412 CONNECTOR 4 PIN 1 000 484014 NPN TRANSISTOR ZTX10 1 000 486276 IC LT1081CN 1 000 180004 CHOKE 100UH 10 1 000 215031 SOCKET 20 PIN DIP 2 000 211213 CONNECTOR 2 PIN 2 000 211629 CONNECTOR 6 PIN 1 000 470111 RESISTOR 33 OHM 3 000 153046 CAPACITOR 4700PF 1 000 486606 CD4093BE 1 000 152066 CAPACITOR 220uF 1 000 485520 TRANSISTOR BS2SO 2 000 212529 CONNECTOR 20 PIN 1 000 484515 LM317LZ REGULATOR 1 000 215055 SOCKET IC
60. 5693 01 MAIN ASSEMBLY 18 2 Seq Item Nbr Description Qty 013 140002 CARD GUIDE 2 5 L 2 005 5713 01 SPEAKER ASSY 1 007 5719 01 FRONT PANEL ASSY 1 014 161067 TAPE CL CELL 0 5 Jun 01 Model 520A Service Manual 81 Section 18 Parts Lists Seq Item Nbr Description Qty 010 5766 01 BOTTOM COVER ASSY 1 008 5728 01 CABLE ASSY SPO2 IN 1 001 2471 01 MAIN BOARD ASSY 1 012 9621 16 LENS ALERT 1 017 286220 SCREW 6 32 X 3 16 0 003 6538 01 REAR PANEL ASSY 1 002 5664 10 CHASSIS MODEL 520A 1 016 286205 6 32 x 3 4 S B H 0 006 5714 01 BATTERY HARNESS ASSY 1 015 284200 144 40 x 1 4 SLOTTED 0 018 400024 BATTERY 12VDC 2 3A 1 009 5765 01 TOP COVER ASSY 1 001 2775 01 MAIN BOARD ASSY 1 6538 01 REAR PANEL ASSY 18 3 Seq Item Nbr Description Qty 007 6538 17 REAR PANEL SUBASSY 1 018 285001 LOCK WASHER NO 6 0 019 285005 FLAT WASHER NO 8 0 003 5812 10 SPACER SUPPORT 2 002 4109 10 SUPPORT BRACKET PC 1 024 161092 ADHESIVE 262 0 006 9090 01 POWER CABLE ASSY 1 001 2726 01 POWER SUPPLY BD ASSY 1 014 280188 STANDOFF 3 8 DIA 0 004 5820 01 GROUND WIRE ASSY 1 012 210149 POWER ENTRY MODULE 1 023 285013 NYL WASH 4 NATURAL 0 017 285000 LOCK WASHER NO 4 0 022 608033 WIRE CLIP amp BUSHING 1 013 216059 CONNECTOR PLUG 1 011 161008 ADHESIVE 242 0 021 515023 FUSE 1 2A 250V 2 020 286219 S
61. 6 OFF Printing 7 ON Density 8 ON 100 Dip SW 2 1 ON Printing Columns 40 2 ON User Font Back up ON 3 ON Character Select Normal 4 ON Zero Normal 5 ON International 6 ON Character 7 ON Set 8 OFF U S A Dip SW 3 1 ON Data Length 8 bits 2 ON Data Parity No 3 ON Parity Condition Odd 4 ON Busy Control H W Busy 5 OFF Baud 6 ON Rate 7 ON Select 8 ON 9600 bps Continue Push On line SW Write Push Paper feed SW CAUTION DIP SW Set Mode cannot be cancelled once it is initiated Answer ON or OFF for every setting Note More information about DIP switch settings can be found in the Seiko DPU 414 Thermal Printer Operation Manual 3 When the printer finishes writing the new settings to memory DIP SW setting complete is printed out and the printer returns to ON LINE mode CAUTION Never turn the printer off while it is writing the new settings to memory Wait until DIP SW setting complete is printed then the printer power may be turned off 66 Model 520A Service Manual 5693 90 01 Connecting the ThinkJet Printer Connecting the ThinkJet Printer 15 2 To connect the Hewlett Packard ThinkJet Printer to the Model 520A 1 The Hewlett Packard ThinkJet must be a Model 2225D RS 232C interface 2 Setthe dip switches on the rear panel of the ThinkJet Mode sw
62. 84204 4 40 X 1 2 SLOTTED 0 2473 01 ALERT BOARD ASSY 18 8 Seq Item Nbr Description Qty 006 482565 LED CLEAR ROUND 4 005 470024 RESISTOR 100 OHM 2 007 600038 RIBBON CABLE ASSY 1 001 2473 02 FAB ALERT BOARD 1 5720 01 DISPLAY ASSY 18 9 Seq Item Nbr Description Qty 001 482573 LCD MODULE DOT MATRIX 1 002 600033 RIBBON CABLE ASSY 1 5713 01 SPEAKER ASSY 18 10 Seq Item Nbr Description Qty 001 130010 SPEAKER 8 OHM 15 1 002 211225 CONNECTOR 2 PIN 1 005 5855 10 FOAM LINER 1 004 608003 TUBING HEAT SHRINK 0 003 605060 WIRE 26AWG PVC INS 0 5714 01 BATTERY HARNESS ASSY 18 11 Seq Item Nbr Description Qty 004 605163 WIRE 22AWG BLACK 0 5 Jun 01 Model 520A Service Manual 85 Section 18 Parts Lists Seq Item Nbr Description Qty 001 211215 CONNECTOR 2 PIN 1 002 216068 TERMINAL LUG RECEPT 0 005 608001 CABLE TIE 0 003 605162 WIRE 22AWG RED 0 5728 01 CABLE ASSY 18 12 Seq Item Nbr Description Qty 004 211704 CONNECTOR RCPT 1 011 605063 WIRE 26AWG PVC INS 0 015 608005 TUBING HEAT SHRINK 0 006 210098 CONTACT FEMALE 0 008 605059 WIRE 26AWG PVC INS 0 007 280108 SNAP RIVET 0 001 5606 16 DRESS BEZEL SAO2 IN 1 014 608001 CABLE TIE 0 010 605061 WIRE 2EAWG INS 0 003 180009 FERRITE SLEEVE 1 013 6
63. ATOR USED C114 D18 F2 FB3 IC46 J109 L2 017 R64 RP13 T1 TP2 VR1 7 REFERENCE DESIGNATOR NOT USED 103 151 8 TONE GENERATOR BOARD 2755 01 FITTED IN PLACE OF 1C27 NOT SC THERWISE SPECIFIED E 07 N403 GAug96 U 00 NLESS N362 23Mar95 DIMENSIONS ARE iN INCHES mm SCHEMATIC MAN eoo NOVAMETRIX MODEL 520A MEDICAL SYSTEMS INC vr ness oe N25 754103 RE aor cs deze on Vine oF 5557 per us preg os fesz oz xaos 2892 wo os voz 252 2471 03 11 as a P O sewer na sss sess This document contains information which is prietary and the property of Novametrix Medical Systems Inc and may not be reproduced used or disclosed in whole or in part without the written consent of Novametrix Medical Systems Inc DATA BUS i ADDRESS BUS To Sheets CONTROL BUS 2822 Ferrite Bead 622561 12 14 9 CPUINTx g O DACCSx PWRON E TAHC32 ICe8 80 18k 4 9 ROCCE L 74HC32 D TRANS 3 8 DECDR 4 1 23 LATCHES vcc DEMUX O A J103 Do 1 QUE HM D11 RP2 IC21 5 74HC 14 1N4148 10k TAHC 14 6 3 5 os Ne C45
64. BUT DO NOT ATTACH LOCATE LABELS APPROXIMATELY AS SHOWN FOR TEST PROCEDURE SEE 5693 04 FOR QA INSPECTION PROCEDURE SEE 5693 70 INCLUDE USERS MANUAL ITEM 6 WITH MONITOR FOLD LABEL IN HALF AND SECURE TO CABLE amp ITSELF WHILE LOCATING ON 3 IN APPROX CABLE APPROX AS SHOWN 57 449 14 97 mms mm S ET mas omes NOVAMETRIX N758 18 00 bees OF OXYPLETH 520 MEDICAL SYSTEMS INC 0 1 N727 16Nov95 0 5 207 003 mm 5 18 _ WALLINGFORD CT USA 06492 MATERIAL 20 92 MRL N547 12Febsa 304 95 92 ANH zaoa D 5693 00 13 ejus ec This document contains information which is pro prietory ond the property of Novometrix Medicol Systers inc and moy not be reproduced used disclosed in whole of in part without the written consent of Novametrix Medical Systems Inc N y eS 27 ZZZ lt J f 22222 NO ov 3 va PATENTS 5 190 038 5 398 680 vy 35109 RS232C NOVAMETRIX ACCESSORIES THE ORDER OF A LICENSED MEDICAL PRACTITIONER 120Y CAUTION EQUIPMENT MUST BE GROUNDED AT ALL DEVICE TO SALE DISTRIBUTION OR USE BY OR ON T250mA 2 200 240 TIMES TO AVOID DANGEROUS ELECTRICAL SHOCK CAUTION FEDERAL
65. CC to Switcher 5V C36 Q ji g81uF 51 18 1 2W l 5 UMLESS OTHERWISE SPECIFIED AIN BOARD IRF9523 A 4106 57 3Jun98 1 icies imi SCHEMATIC 5 D 3 1 BREAK ALL SHARP EDGES OXYPLETH 528 11 2 57 27 98 NOVAMETRIX MATERIAL acum L cite 4 266 97 DRAWN CHECKED Medical Systems Inc 198 vds 4 07 13Aug96 Tony Esposito MR Lineback USA 06492 S99 FINISH Jan 28 1991 2enayse 26 362 95 PEG ENGR APPROVED SIZE CODE REV arvie Kerse NT ims SEE PNG D 2471 LATCHES REV FR NO DATE TIME 16 25 713 USED ON 2471 1 SCALE NONE SHEET 4 5 8 7 6 5 4 3 2 1 This document contains information which 15 prietary and the property of Novametrix Medical Systems Inc and may not be reproduced used or disclosed in whole or part without the written Consent of Novametrix Medical Systems Inc V12 TANT fL C18 16V 18uF VA D2 D VBACK 4 T 470urF UF40p2 1 RP4 1 100k 1N4148 16v 7 UF5400 TEE EE 16 1 uF dc 1 10 Su Q R63 100 R19 12 1k 19 9 A J102 63 R7 3 amp LINEST 8 22uF Ik 415 b wi
66. CREW 6 32 X 1 1 4 0 008 6549 01 GROUND WIRE ASSY 1 016 281501 NUT HEX NO 6 32 0 015 281500 NUT HEX NO 4 40 0 5673 01 REAR PANEL ASSY 18 4 Seq Item Nbr Description Qty 016 285001 LOCK WASHER NO 6 0 007 5812 10 SPACER SUPPORT 2 002 4109 10 SUPPORT BRACKET 1 019 5819 01 GROUND WIRE ASSY 1 022 285046 WASHER FLAT NO 6 0 5693 90 01 82 Model 520A Service Manual 2726 01 POWER SUPPLY BD ASSY Seq Item Nbr Description Qty 005 5673 32 REAR FACEPLATE 1 006 5743 10 POWER ENTRY MODULE 1 013 280188 STANDOFF 3 8 DIA 0 020 5820 01 GROUND WIRE ASSY 1 003 5229 11 WIRE CLIP MOD 1 017 285013 NYL WASH 4 NATURAL 0 015 285000 LOCK WASHER NO 4 0 011 216059 CONNECTOR PLUG 1 023 161008 ADHESIVE 242 0 008 9308 11 BUSHING MOD LINECORD 2 021 515023 FUSE 1 2A 250V 2 018 286219 SCREW 6 32 X 1 1 4 0 004 5673 10 REAR PANEL 1 012 281501 NUT HEX NO 6 32 0 001 2472 01 POWER SUPPLY BOARD 1 014 281500 NUT HEX NO 4 40 0 2726 01 POWER SUPPLY BD ASSY 18 5 Seq Item Nbr Description Qty 000 211505 CONNECTOR 5 PIN 1 000 474145 RESISTOR 215 OHM 000 481530 DIODE KBU4G 4 AMP 000 474214 RESISTOR 332K OHM 1 000 474137 RESISTOR 1M OHM 1 000 481549 DIODE MBRS140T3 1 000 152096 CAPACITOR 220UF 1 000 484529 VOLTAGE REGULATOR 1 000 180014 INDUCTOR 2SUH 1 000 474165 RESISTOR 10K OHM 1 000 152081 CAPACITO
67. ESS OTHERWISE SPECIFIED SCHEMATIC POWER SUPPLY DIMENSIONS ARE IN INCHES ma BOARD MODEL 515 SB A BREAK ALL SHARP EDCES NOVAMETRIX 52 FREE 520 1265 4 7108 Medical Systems Inc MATERIAL DRAWN CHECKED M03 134u996 Esposito M R Lineback Hallingford CT USA 06492 N341 16Feb94 ENGR APPROVED CODE REV uz w wo 2 VBAT Ed Harvie 4 FILE 24720303 316 1 93 DATE 13 Aug 96 5 15 92 15 92 2472 03 03 TIME 11 04727 USED ON D2472 81 SCALE NONE SHEET 1 OF 1 8 7 6 5 A 4 3 2 1 m lt This document contains information which is prietory ond the property of Novametrix Medicol Sys erns Inc ond may noi be reproduced used disclosed in whole or in part wothout the writtan consent of Novametrix Medical Systems Inc 2755 BOARD SEE NOTE 6 Q 222 oio Sii eX spo C18 c52 co DA 000000 0lon 8 J109 lt gt IC27 C45 SHORT AS POSSIBLE SCRAPE OFF SOLDERMASK amp CUT CONDUCTOR MOUNT R64 ACROSS BREAK APPROX AS SHOWN MOUNT C114 BETWEEN 39 8 AND IC39 9 SEE NOTE 3 102 107 Te fo Tolo 21221212 FERE HR ic15 4103
68. G ITEM 11 mess S 4 Si 9MpGONS A IN INCHES imm RS 232 C TEST BREAK ALL SHARP EDGES FIXTURE ASSY MODEL NOVAMETRIX ees 515 515 MEDICAL SYSTEMS INC mmi 48 08 WALLINGFORD CT U S A 06492 GE bo d 40 95 29Feb96 SEE DRAWNG NO CODE REV MFG ENGR APPROVED N338 4Dec95 3 20 96 18 Mar 96 D 85479 01101 ejempen 0 serra J1 LEDSRC 8 D1 D3 1N4148 1N4148 D2 D4 R1 1N4148 1N4148 6 81K IRDRV 3 Mark the test jack part number as 3 shown on the completed assembly D5 Parts List ICL8069 Qty Part Description 2 1 152014 Capacitor luF 1 211705 Connector 7 Pin Hypertronics 1 472026 Resistor 6 81 1 472030 Resistor 10K 1 472058 Resistor 100 1 481000 Diode Zener ICL8069 Connector Pin Out 4 481501 Diode 1N4148 Rear View Novametrix Medical Systems itle Front End Saturation Test Jack Document Number 5942 00 Date Wednesda pale Wednesday Jupe 28 2000 28 2000 Sheet
69. HES mm BREAK ALL SHARP EDGES 718 25Jon00 pec pM af NOVAMETRIX N681 Hotes e sev MEDICAL SYSTEMS INC WALLINGFORD CT U S A 06492 z mm mm ANG t 366 1 7May95 l uATERIAL 02 N302 26MAY92 23 OCT 91 SIZE ORAWING NO CODE REV MFG ENGR B N APPROVED A P 1 N299 26MARS2 FINISH 12FEB92 2FEB92 C 5728 01 05 REV USED ON D5693 01 SCALE 2 1 4 3 2 l This document contains information which 15 pro prietary and the property of Medical Systems Inc and may not be reproduced used or disclosed in whole in part without the written consent Novametrix Medical Systems Inc D1 D2 LN21CAL URS LN21CAL URS P105 E 1 E LN21CAL URS LN21CAL URS Re R1 100 100 2 DGND E2 I lt A NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE VALUES ARE IN OHMS 1 74W 1 2 LAST REFERENCE DESIGNATOR USED D4 E2 P185 DO NOT SCALE UNLESS OTHERWISE SPECIFIED SCHEMATIC A DIMENSIONS ARE IN INCHES mm ALERT BOARD BREAK ALL SHARP EDGES MODEL 529A DRAN CHECKED NOVAMETRIX Medical Systems Inc Wallingford CT USA 06492 Tony Esposito M R Lineback FINISH 1 92 15 92 V MFG ENGR APPROVED Harvie SIZE DWG NO CODE REV A E Kersey N304 FILE 24730301 See 2473 031 01 TIME
70. ISTOR 3 92k OHM 1 4W 1 R54 R55 75485527 TRANSISTOR MOSFET IRF9523 GOV P CHANNEL 016 6344 07 PROGRAM EPROM ASSY FOR 2471 amp 2474 ATE 47212 RESISTOR 3 74 OHM 1 4W 1 R17 Y 485528 TRANSISTOR MOSFET IRF540 100V N CHANNEL Q5 216029 POINT 2 4721 2 RESISTOR 47 5k OHM 1 44 1 R21 Jr 485529 TRANSISTOR VNO610L N CHAN ENHANCEMENT 07 011 015 017 472170 RESISTOR 22 1k OHM 1 4W 1 R10 9715 07 PROGRAM PEEL ASSY CSIO CONTROLLER ic18 42293 RESISTOR 23 7k OHM 1 4W 1 R36 PROGRAM PEEL ASSY TIMING SEQUENCER 1042 47219 RESISTOR 41 2k OHM 1 4W 1 R46 R49 JX 486256 C HM62256LP 12 32k STATIC RAM 823006 CRYSTAL 32768k Hz 472198 RESISTOR 33 OMM 1 4W 14 _ R53 Yy486268 72212277727 230018 cRrSTAL 12 288M Hz 4722 0 RESISTOR 5 6 OHM 1 4W 1 R52 YA 486276 IC DS232CPE DUAL RS232C RCVR XMITTER eS ome aw a Ras 486203 i HOGeraRiPs 5 MPU INTEGRATION 152045 CAPACITOR 10wf 16v 2 SPACING __ __ 6 472252 RESISTOR 66 5k OHM 1 4W 1 METAL FILM R40 R42 72486295 1 74 4051 8 ANALOG MULTIPLXR 220uF 63V RADIAL ELECTROLYTIC C109 Fee 4722 RESISTOR 1 OHM 1 4W 1 METAL FILM R28 R64 2486298 IC MM74HC4020N 14 STAGE BINARY COUNTER CAP 50V 20 AL ELECTROLYTIC C45 o RESISTOR 8 66k OHM 1 4W 1 METAL FILM
71. L A2471 28 KIT 09 N557 26Moy98 02 304 45 92 30JAN82 SIZE DRAWING NO REV U E MFG ENGR EH au EIC EA BU REV R No R DATE DT USED ON 05693 01 SCALE NONE SHEET 2 OF 2 This document contains information which 15 pro prietary ond ihe property of Novometrix Medicol Systems inc ond not be reproduced used or disclosed in whole or in part wothout the written consent of Novametrix Medical Systems inc IC CHART C49 TO D GND C37 TO D GND C41 TO D GND C48 TO D GND C44 TO D GND NONE C42 TO D GND 2 20 REF DES TYPE NO POWER DEDCOUPLING vec veci vin v vs va viz va a cnp CAP CluF DS232CPE n 16 15 2 TO GND 122 78MOSCKC QUT IN E GND NONE IC3 CNY17 1ll E NONE 17 2 cs IC6 17 E n LM78L12ACZ IN GND C13 TO GND Ic8 LM79L12ACZ T GND C12 TO A GND e EA en CD4013B C23 TO D GND CD4093BE C25 TO D GND Ic12 IC13 MM74HC573N a C29 TO D GND IC14 C30 TO D GND c15 NONE IC16 C33 TO D GND 17 c40 D GND
72. L to select SpO2 or Pulse limits then use the T or set the limit to the desired value Note that the monitor will maintain a spread of at least 5 digits between the upper and lower limit values TRND softkey enters Trend mode and draws trend memory on display MENU then AUDIO softkeys Select Pulse to turn on off and control the volume of the audible beep with each detected pulse Select ALERT to control alert volume MENU then AVG Select either 2 second or 8 second SpO2 averaging time MENU then LITE softkeys toggles backlight between bright and dim Verify that the SpO and Pulse Rate alert limit settings are consistent with your monitoring application Connect a SuperBright 87xx series sensor to the front panel input Apply the sensor to the patient Check that within several seconds the patient s SpO and Pulse Rate are displayed on the monitor As necessary refer to the appropriate sections within the User s Manual for detailed operating instructions and explanations 5693 90 01 Menu Trees The OXYPLETH menus are described on the following pages 5 Jun 01 Model 520A Service Manual 9 WOE H8 HZL JNO JO euo 3991 WOE HZ jo euo 100 95 GQ3NIV 138 105112 s AON NIVIN 10910 NNAW NIV t ca 5
73. LIMINARY ASSY NOTES APPLY A SMALL DROP OF ADHESIVE ITEM 7 BEFORE ASSEMBLY ITEM 11 TO STUDS APPLY A SMALL DROP OF ADHESIVE ITEM 11 TO SCREWS ITEM 20 BEFORE ASSEMBLY MODEL 5154 58 amp NOVAMETRIX Ci 520A MEDICAL SYSTEMS INC E 6838 01105 00 75 FINISH 3 1 98 2 1 98 jv R No DATE d This document contains information which is prietary the property of Novometrix Medicol im whole et m part wihou the written ITEM 11 REF 4 consent of Novametrix Medical Systems Inc USE THICK HEX NUT TO MOUNT GL303 2 DISCARD STAR WASHER amp THIN HEX NUT 3 PL 0415 PLACE 1 HEX NUT BETWEEN EACH GROUND LUG CONNECT P301 FROM PM301 TO 4301 ON PWR SUPPLY BD i Arn 3 ITEM 1 REF E INSTALL WIRE FROM GL303 61301 SECOND INSTALL WIRE FROM PM301 ON GL3O FIRST 9 INSTALL THIS GND WIRE 20 2 1 61301 LAST ITEM 5 REF DETAIL RS232C NOVAMETRIX ACCESSORIES NOVAMETRIX MEDICAL SYSTEMS INC WALLINGFORD CONNECTICUT U S A CAUTION FEDERAL U S A LAW RESTRICTS THIS DEVICE SALE DISTRIBUTION OR USE BY OR ON THE ORDER LICENSED MEDICAL PRACTITIONER CAUTION EQUIPMENT MUST GROUNDED AT ALL 5 TO AVOID DANGEROUS ELECTRICAL SHOCK HAZARD PATENT PENDING NOTE ORIENTATION OF SPACER
74. LY D6 1 DO NOT SCALE ERO BOARD ASSY NOVAMETRIX P OXYPLETH 520A MEDICAL SYSTEMS INC TP WALLINOFORD CT USA 08492 tg 4 2 92 8541 10 9 Wes enc ST AX DRAWING NO CODE REY 01 N316 31MAR93 FINSH 8 15 82 15 92 2472 01 03 22 2 e 2 This document contains information which 15 pro prietary and the property of Novametrix Medical Systems Inc and may not be reproduced used or disclosed in whole or part without the written consent of Novametrix Medical Systems Inc Isolation Barrier A J391 D 1 11 VCH I 3 81 Li DS D1 9523 5 4 4 2 i VIN 4 GBU4D 1 D4 Elec C4 2 171076 5400 35 220ur I GND Elect L 1 vFB 35v 6 6 5 5 A E301 ie 1 5400 2 Z NOTE 4 VN10KH A P102 A E302 F301 1 VIN B 1 510 5408 Fast Acting 2 VCH 1 2 6 3 E LINEST IN RIS 3 150 10 4 yp CND A NOTES 1 UNLESS OTHERHISE SPECIFIED 1 RESISTANCE VALUES ARE IN OHMS 1 4H 1X 5 2 LAST REF DES USED C7 D6 E302 F302 2202 L1 Q2 16 2 CONNECT AND AGND ONLY AT 1 1 3 4 E3801 AND 06 ARE FOR DC OPTION AND ARE NOT PART OF THIS ASSEMBLY A ee DO NOT SCALE 1 1341 UNL
75. MAINS is reconnected MOSFET 08 continues to block current from IC9 pin 7 and the monitor remains off Connecting the AC Mains does however send the LINEST signal High This High Line Status signal is brought to IC10 pin10 where it Resets the 2 flip flop sending IC10 pin 13 Low and removing the Set condition from flip flop 1 Now if the front panel POWER key is pressed flip flop 1 is clocked IC11 11 goes High MOSFETs Q7 and 08 turn on the supply to IC9 pin 7 is restored the pulse width modulator restarts energizes and the monitor turns back on Timing Sequencer 9 3 6 A 14 stage divider IC39 acts as a timing sequencer See sheet 3 on 2471 schematic sheet 2 on 2775 schematic A 3 276 MHz crystal Y2 provides a Clock Sequence CLKSEQ to IC39 pin 10 The IC39 pin 11 RESET input line resets IC39 on monitor power up The IC39 pin 9 Q1 output provides a clock input signal to the tone generator board located at IC27 The IC39 pin 3 Q14 output provides a 5 ms interrupt INT5MS for IC18 The Q4 Q11 outputs of IC39 become inputs to the Data Sampling Controller IC42 Data Sampling Controller 9 3 7 The IC39 Timing Sequencer s Q4 Q11 outputs become inputs to IC42 a PEEL Programmable Electrically Erasable Logic device The PEEL uses the CLK and D0 D6 inputs and the SC1 and SC2 inputs to control data sampling by providing sensor LED drive signals and demultiplexing for the signals returning from the saturation sensor The
76. OXYPLETH Service Manual Pulse Oximeter Model 520A June 5 2001 Catalog Number 5693 90 01 Novametrix Medical Systems Inc Wallingford Connecticut U S A 06492 Copyright 1992 2001 rights reserved No part of this manual may be reproduced without the written permission of Novametrix Medical Systems Inc Section Model 520A Service Manual 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 guarantees other than one year Novametrix reserves the right to perform guarantee service s at its factory 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 fuses batteries and calibration 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 void this guarantee and release Novame
77. PL BOARD 1 061 472037 RESISTOR 13 7K OHM 2 5693 90 01 5 Jun 01 1 0 Schematic and Assembly Drawings Drawing 5693 09 2726 01 2726 03 2472 01 2472 03 5693 01 2471 01 2471 03 2775 01 2775 03 2755 01 2755 03 5728 01 2473 03 5676 27 5693 00 Description Overall Wiring Diagram PSU Board Assy PSU Board Schematic PSU Board Assy PSU Board Schematic Oximeter Unit Assy Main Board Assy Main Board Schematic Main Board Assy Main Board Schematic Tone Generator Replacement Bd Tone Generator Replacement Bd Cable Assy SpO2 Input Alert Lamp Board Keypanel Schematic Main Assy Model 520A 9622 01 2289 01 2289 03 Optional Analog Module Analog RS232 Module Analog RS232 Bd Assy Analaog RS232 Bd Schematic Table 5 Schematic and Assembly Drawings Model 520A Service Manual 93 This document contains information which is pro prietory and the property of Novametrix Medica Systems Inc and may not be reproduced used or disclosed in whole or in part without the written consent of Novametrix Medical Systems Inc aa 572765 EE D S mE zr mm _ J PM301 2 POWER ENTRY MODULE 1301 E CONFIGURED FOR 120V AC VOLTAGE 5 8 F101 SELECTOR 5 3 J304 1 2A 250V F302
78. PROM Checksum Test Production Test Mode Turn the monitor on while holding Softkey 1 the leftmost softkey and the monitor calculates and displays the checksum value of the EPROM containing the system software Press and hold Softkey 3 while the checksum is displayed and the monitor enters Production Test Mode Softkey 2 Extended Display and Watchdog Test Turn the monitor on while holding Softkey 2 second from left and all front panel indicators and display segments illuminate for several sec onds The watchdog now resets the monitor which should then execute its normal power up sequence Note that the indicator will illuminate only if the monitor is being powered from the AC Mains 5693 90 01 5 Jun 01 1 3 Accuracy Test Introduction 13 1 The Accuracy Test verifies the performance accuracy of the Model 520A Pulse Oximeter monitor If the monitor does not pass the accuracy test the monitor should be recalibrated Refer to Section 14 Calibration Tests on page 59 or contact the Novametrix Service Department for repair replacement assistance The test requires the use of the Model TB500B Sensor Simulator 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 TB500A should contact the Novametrix Service Department for details on upgrading to the TB500B Note that the TB500A used in conjunction with the Cat No 5453
79. R 6BOOUF 1 000 474162 RESISTOR 61 9K OHM 1 000 5918 10 XFMR MAINS PWR SPL 1 000 470026 RESISTOR 150 OHM 1 000 474215 RESISTOR 2 21K OHM 1 000 486805 IC LM393M DUAL VOL 1 000 2725 02 RAE POWER SUPPLY BD 1 000 515085 FUSE W FUSEHOLDER 1 000 474141 RESISTOR 249K OHM 1 000 2726 04 TEST PROCEDURE PWR 0 000 600034 RIBBON CABLE ASSY 1 000 474181 RESISTOR 4 3 OHM 1 000 474166 RESISTOR IOOK OHM 4 000 474216 RESISTOR 4 99K OHM 1 000 485543 TRANSISTOR MOSFET 1 000 211213 CONNECTOR 2 PIN 1 000 481552 DIODE MBRS340T3 3 000 154072 CAPACITOR 1UF 4 5 Jun 01 Model 520A Service Manual 83 Section 18 Parts Lists Seq Item Nbr Description Qty 000 474151 RESISTOR 37 4K OHM 1 000 484559 VOLT RGLR LT1076CT 1 000 515083 FUSE W FUSEHOLDER 1 000 2726 17 POWER SUPPLY BOARD 1 000 154079 CAP 1OUF 2EV 20 1 000 474218 RESISTOR 47 5K OHM 1 000 280114 SNAP RIVET 118 0 000 152029 CAPACITOR 220UF 20 1 000 485532 TRANSISTOR 2N7002T1 1 000 474211 RESISTOR 49 9 OHM 1 000 481561 DIODE ULTRAFAST 3A 1 000 474341 RESISTOR 4 3 OHM 1 000 481563 DIODE SCHOTTKY 5A 2 2472 01 POWER SUPPLY BOARD 18 6 Seq Item Nbr Description Qty 024 472065 RESISTOR 200K OHM 1 016 211505 CONNECTOR 5 PIN 1 036 484539 VOLTAGE REGULATOR 1 001 2472 02 FAB POWER SUPPLY BD 1 032 481530 DIODE KBU4G 4
80. RESISTOR 3 92 OHM 2 079 472272 RESISTOR 59K OHM 1 093 481534 DIODE BAT82 SCHOTT 2 008 2471 28 MAIN BD KIT 1 075 472227 RESISTOR 47 OHM 2 088 474134 RESISTOR PACK 41K 1 003 5712 10 TRANSFORMER MAIN BD 1 117 486299 IC CSS5O3JP 20 BIT 2 069 472170 RESISTOR 22 1K OHM 1 086 474132 RESISTOR PACK 41K 2 081 472276 RESISTOR 6 49K OHM 2 077 470016 RESISTOR 22 OHM 1 078 472268 RESISTOR 8 66K OHM 1 138 5833 01 GROUND WIRE ASSY 1 055 472003 RESISTOR 100 OHM 4 5 Jun 01 Model 520A Service Manual 91 Section 18 Parts Lists 92 Model 520A Service Manual Seq Item Nbr Description Qty 068 472146 RESISTOR 47 5K OHM 1 014 152072 CAPACITOR 1OUF 1 076 472246 RESISTOR 66 5K OHM 2 072 472198 RESISTOR 3 3 OHM 1 010 6266 57 PROGRAM DISK ASSY 0 084 474098 RESISTOR PACK IOOK 4 148 153027 CAPACITOR 220PF 1 059 472030 RESISTOR 10K OHM 6 087 474133 RESISTOR PACK 10 OHM 1 145 474086 RESISTOR PACK 10K 1 003 5711 10 TRANSFORMER MAIN BD 0 060 472034 RESISTOR 12 1 OHM 1 025 153038 CAPACITOR OO1UF 1 016 152075 CAPACITOR 47UF 25V 2 028 154016 CAPACITOR 1UF 59 142 216029 TEST POINT 2 012 152045 CAPACITOR 1OUF 16v 6 144 153052 CAPACITOR 022UF 1 015 152073 CAPACITOR 100UF 4 024 153021 CAPACITOR 47UF 1 071 472195 RESISTOR 41 2K OHM 4 027 153051 CAPACITOR 22UF 1 089 474135 RES PACK 100 OHM 1 091 481031 DIODE ZENER 1 154 2755 01 TONE GEN RE
81. S 5 190 038 5 398 580 3 8 BOTH ENDS RS232C NOVAMETRIX ACCESSORIES 3579 DEVICE TO SALE OISTRIBUTION OR USE BY OR ON THE ORDER OF A LICENSED MEDICAL PRACTITIONER 0 54 SB 2 100 120 CAUTION EQUIPMENT MUST BE GROUNDED AT ALL CAUTION FEDERAL U S A LAW RESTRICTS THIS HAZARD 1250 2 200 240V TIMES TO AVOID DANGEROUS ELECTRICAL SHOCK ODOQOQ 8 6 P108 i ri v cx b ul o 74 THI 2 ff 9 55 2 Xi E 3 355 8 is dE gg 8 5 gt J304 8 E Uz ae 17 INSTALL GND WIRE FROM 0 303 TO GL201 DETAIL T ie e 366 15 95 BREAK ALL SHARP EDGES MAIN ASSEMBLY NOVAMETRIX N341 11 9094 oec MODEL 520A MEDICAL SYSTEMS INC 325 15Ju193 gt 003 WALLINGFORD CT U S A 06492 ANG s 10 3 516 24Mor93 DRAWN 02 N3o4 150cto2 29Apr92 MRL suc oRwwwG CODE REV MFG ENGR EH APPROVED D 5695 101 13 N377 10 96 01 N302 26MayS2 Finish 22 92 22 92 re USED ON D5693 00 SCALE 1 4 SHEET 2 OF 2 DESCRIPTION REF DES This document contoins informotion which is pro priet
82. SEE DETAIL A FOR PRELIMINARY ASSY A APPLY A SMALL DROP OF ADHESIVE ITEM 23 TO STUDS ITEM 13 BEFORE ASSEMBLY A APPLY A SMALL DROP OF ADHESIVE ITEM 23 TO SCREWS ITEM 18 BEFORE ASSEMBLY DO NOT SCALE ITHERWISE pu UNLESS OTHEI SPECIFIED DIMENSIONS IN INCHES REAR PANEL ASSY erent 520A AND 515A SB MEDICAL SYSTEMS INC WALLINGFORD CT USA 06492 mm mm Ex sss or a N316 24MAR93 MFG ENGR APPROVED AK N304 140CT92 FINISH 29APR92 29APRS2 SEE ORAWING NO D 5673 01 03 This document contains information which is pro prietary and the property of Novametrix Medical consent of Novametrix Medical Systems Inc d 2 2 51 T LOCATE APPROX AS SHOWN P1 BLU 26AWG 1 3 4 L L 52 A 4 7k Q 1 4W WHT 26AWG 1 3 4 L VIO 26AWG 2 1 4 L BLK 26AWG 2 1 4 L WIRING DIAGRAM NOTE 1 8 STRIP amp TIN ON EACH END FOR ALL WIRES AFTER ATTACHING WIRES BEND SWITCH TERMINALS AS REQUIRED 13 1 25 14 REAR VIEW BOTTOM COVER amp WIRES NOT SHOWN FOR CLARITY AFTER ATTACHING WIRES TRIM SWITCH TERMINALS AS REQUIRED NOTES A WIRE CONNECTIONS WITH HEAT SHRINK 13 5 5 8 L COVER LEAD OF RESISTOR ITEM 4 FROM 1 25 WITH 3 8 L TUBIN
83. STEMS ROLLSTAND 140098 Rollstand includes base casters tilt swivel head post poll handle utility basket Requires either 140095 or 140101 Mounting Plate Kit ROLLSTAND AND MOUNTING ACCESSORIES 140095 Adapter Plate Kit for 515B C 520A 2001 1265 7100 860 and CO jSMO Plus 140099 Laptop Tray with Adapter Plate 140030 Wall Mount 140031 Wall Mount less Wall Channel 140032 Pivot Block Mount 140036 Countertop Mount 5 inch Base 140100 Swivel C Clamp Hanger 140067 Clamping Block 140068 Counterweight for Rollstand 140070 Pole Mount Bracket for 2 pole for Models 515B C 520A 2001 1265 7100 860 and COSMO Plus 140093 Mounting Plate Upgrade Kit contains Mounting Plate Only 140094 Pole Mount for 3 4 2 dia pole for Models 515B C 520A 2001 1265 7100 860 and COSMO Plus 140097 6 Utility Basket for Rollstand 5 Jun 01 Model 520A Service Manual 79 Section 17 Accessories This page intentionally blank 80 1520 Service Manual 5693 90 01 1 Parts Lists Family Tree 18 1 The Model 520A diagram below shows the individual assemblies of the finished product the 5693 00 Final Assembly 5765 TOP COVER ASSY 2471 2775 MAIN BD ASSY 5673 6538 REAR PANEL AS 5766 BOTTOM COVER ASSY HENEN 5719 FRONT PANEL ASSY
84. Section 16 2 Range 0 100 Accuracy 80 100 2 0 79 unspecified Approximately 68 of the observations are within the accuracy claim Display Resolution 196 Averaging Time menu selectable times of 2 and 8 seconds Audible SpO Trend Feature Pitch of user selectable Pulse Rate beep tracks the SpO value 1 decreasing SpO values are signalled by lower pitched Settling Time Display settles to within 1 of the final reading less than 15 seconds after the sensor is properly applied Alerts Continuously displayed Menu selectable high and low 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 or the monitor can be set to use its default settings each time it is turned on Pulse Rate Section 16 3 Range 30 250 beats per minute bpm Accuracy 1 of full scale Approximately 68 of the observations are within the accuracy claim Display Resolution 1 bpm Averaging Time fixed at 8 seconds Settling Time Display settles to within 1 of the final reading less than 15 seconds after the sensor is properly applied 5 Jun 01 Model 520A Service Manual 73 Section 16 Specifications Alerts Continuously displayed Menu selectable high and low limits 249 30 or Off Visible alarm is immediate Audible alarm occurs after 10 sec
85. T key to return to maximum 07 volume Press RUN Press MENU then press LITE verify the backlight toggles between dim and bright with each depression Press RUN Press the Menu key and then the AUDIO key Press the PULSE key to display the SET AUDIO FEATURES menu Press the T key to set the value to 01 then press RUN Do not apply the sensor to yourself If using a Y Sensor fold the sensor heads so that the windows face or even touch each other Connect the sensor to the monitor Verify the Message Center flashes PROBE PATIENT and no alarm sounds If using a Finger sensor apply it to your index finger and if using a Y Sensor tape the sensor to your index finger Verify that after several sec onds reasonable Pulse Rate and Saturation 29596 values are displayed Check that the Message Center displays a Pulse Activity Bar and that a tone sounds with each pulse beat Note that the pitch of the tone will vary with the Saturation display value Remove the sensor from your finger Verify the Saturation and Pulse Rate displays blank out an alarm sounds and PROBE OFF PATIENT is dis played If using a Y Sensor you may have to fold the heads so that the windows face each other in order to make the alarm and message acti vate 3 This message is only displayed if the ALERT RESET key is depressed at power up 4 If Monitor Error appears turn the monitor off and back on If the message reappears contact qu
86. TM S 101 SLO BLO OG 481901 JYYTL 1A B5714 01 12V DC 8 V FAST ACT Q gt POWER INPUT 100 120V AC 50 60 Hz e 11 102 POWER SUPPLY BD 1 2 250V 02726 03 SLO BLO F301 Y 2 7 SLO BLO FRONT PANEL 5719 01 REAR E302 PANEL 1 J E ee eS SHIELDING 24 a ISOLATION BARRIER GRN YEL 102 KEYPANEL 21301 GL201 J102 Z 05676 27 INTERIOR GRN YEL BOTTOM COVER 515 5 GRN YEL F1 L 1 GL303 SLO BLO t EXTERIOR B5713 01 ALERT BOARD FRONT GRN YEL Sila PANEL GL302 INTERIOR RIGHT ANGLE MOUNTING BRKT ojo Sa MAIN BOARD DISPLAY ASSY 02471 05 zs C5720 01 e RS232C 5 ao NOVAMETRIX ACCESSORIES F2 TONE GENERATOR BOARD B C5728 01 SpO2 B2755 03 100mA Sia INPUT FAST ACTING EMI RFI SHIELDING DO NOT SCALE a ot a Cm OVERALL WIRING BREAK ALL SHARP EDGES DIAGRAM NOVAMETRIX Dee Ar 2 22 OXYPLETH 520 MEDICAL SYSTEMS INC HOLES 4 007 003 imm 4 18 08 WALLINGFORD CT U S A 06492 ANG i rev N547 10Feb98 MATERIAL DRAWN MRL CHECKED 3Feb82 29APR92 C PERS S By N375 16Nov95 29APR92 29APR92
87. TOR 22UF 1 000 481501 DIODE 1N4148 SIGNAL 9 000 472274 RESISTOR 26 7 OHM 1 000 472105 RESISTOR 3 92K OHM 2 000 470109 RESISTOR 470K OHM 1 000 481534 DIODE BAT82 SCHOTT 2 000 2471 28 MAIN BD KIT 1 000 472227 RESISTOR 47 OHM 2 009 285000 LOCK WASHER NO 4 0 000 474134 RESISTOR PACK 41K 1 000 486299 IC CS5SO3JP 20 BIT 2 000 472170 RESISTOR 22 1K OHM 1 000 474132 RESISTOR PACK 41K 2 000 472276 RESISTOR 6 49K OHM 2 000 470016 RESISTOR 22 OHM 1 000 472268 RESISTOR 8 66K OHM 1 000 5833 01 GROUND WIRE ASSY 1 000 472003 RESISTOR 100 OHM 2 000 472146 RESISTOR 47 5K OHM 1 000 152072 CAPACITOR 1OUF 1 000 472246 RESISTOR 66 5K OHM 2 000 472198 RESISTOR 3 3 OHM 1 000 474098 RESISTOR PACK 4 000 153027 CAPACITOR 220PF 1 000 472030 RESISTOR 10K OHM 7 000 474133 RESISTOR PACK 10 OH 1 000 474086 RESISTOR PACK 10K 1 000 472034 RESISTOR 12 1K OHM 1 000 153063 CAPACITOR 220PF 2 000 152075 CAPACITOR 47UF 25V 2 000 474138 RESISTOR 100 OHM 4 000 154016 CAPACITOR 1UF 59 000 216029 TEST POINT SPRING 2 000 152045 CAPACITOR 1OUF 16V 6 000 153052 CAPACITOR 022UF 1 000 152073 CAPACITOR 100UF 4 007 280023 SPACER HEX 4 40 0 000 153021 CAPACITOR 47UF 1 000 472195 RESISTOR 41 2K OHM 4 000 180011 FERRITE BEAD 22 AWG 1 5693 90 01 2471 28 MAIN BD KIT part of 2775 01 5 Jun 01
88. U S A LAW RESTRICTS THIS HAZARD m REPLACE FUSE AS MARKED 5 8 2 100 GOUNE See NOVAMETRIX 572 MEDICAL SYSTEMS INC WALLINGFORD CT U S A 8 8 5 5 ce 9 n sz E 3 5 5 5 2 g 2 8 00 SEE SHEET 2 FOR SUBASSY pea NR NEN UNLESS SPECIFIED E THIS VIEW SHOWN WITHOUT TOP COVER 13 N727 17uanoo N366 19 5 open a Sr MAIN ASSEMBLY NOVAMETRIX 12 557 26Moy98 n341 1120994 MODEL 520A MEDICAL SYSTEMS INC 11 N547 12Feb98 04 325 t SJut93 notes 003 fam WALDNGFORD CT U S A 06492 427 1 7 WATER CHECKED ewe mess Fama ue auge ess p N377 100 96 N302 26May92 FINISH 22May92 22Moy92 D 5693 01115 ay fie CU SE S This document contains information which is prietary ond the property of Novometrix Systems Inc and may nol be reproduced used disclosed in whole or in part wilhout the writtan consent of Novametrix Medical Systems Inc 2 PL 1 IN L LOCATE TAPE ON UNDERSIDE OF CHASSIS AS SHOWN 3 26 LS201 5 NO 19 P302 PATENT
89. VSEL NC NC LF353N SD e Static Guard AD780AN Q15 R56 F VN0610L 100 N 3VREF Note JP2 Out Vref 2 5V JP2 In Vref 3 0V SIGND LED1SK ASAMP RDSMP 17 BLM31A601S LED2SK Q12 VNO0610L x ADCV12 1N4148 83822828E 18CV8 o eo o N GND LEDSRC 41 0K INC PRB iK iN4148 SCHEMATIC MAIN BOARD Novam RP10 C73 E 520 amp 2001 Medical Systems inc 100K 7 B Barnes Industrial Park Road Note 41 0K 00 om Wallinglord USA 06802 R32 2874 for Vial 30v ECRIRE P 2 __ 9 TC O7oct99 70ct99 R32 287k for Vref 3 0V Cs 92 sapo _ 2775 amp 2775A ot N727 i7Jano0 27750304 R No Date Friday November 17 2000 SHEETS 1 2AND4 D CU SNDOUT REFA vec 108 1u VDD pe eee oat s Noe at 080 Rogge Ns ous seg es 4 DB6 Noo re eae 087 WR cs OUTA DACA DACB CNTRST RD xT AGND C59 AD7528 22p MSM6242BRS 1 VCC VCC 1 Q AUD 4 eae Eee Wi k Suam a SNDOUT Re is P11 Oep 156 Aper 100 07 225 _ WR 328 LINEST 64 LINEST We
90. WHEN INSTALLED HAND SOLDER TRANSFORMER T1 DO NOT WAVE SOLDER FOR ATE TEST USE A6344 07 A6266 57 amp 6266 04 LOCATE 2755 BOARD AT IC27 WITH ORIENTATION AS SHOWN 25Jul96 uw res OTHERWISE SPE mE Nsez 22werss PP share tros MAIN BOARD ASSY NOVAMETRIX 05 N348 5May34 OXYPLETH 520A MEDICAL SYSTEMS INC 681 13Aug99 325 80493 eae WALLINGFORD CT USA 06492 29APR92 USED ON D5693 01 SHEET 1 OF 2 eee 557 26 N304 ur eR TI heroe ORAWNG NO CODE REV 5 This document contains information which is pro PN DESCRIPTION REF DES PN DESCRIPTION REF DES DESCRIPTION REF DES Bystama Inc ond may be reproduced used or m disclosed in whole in part wothout the written gt consent of Novametrix Medical Systems Inc Y 180004 CHOKE 100uH 10 SHIELDED 12 400005 IC
91. alified service personnel See Section 11 Troubleshooting on page 47 52 Model 520A Service Manual 5693 90 01 Special Power Up Functions 5 Jun 01 12 2 19 12 2 20 12 2 21 12 2 22 12 2 28 12 2 24 12 2 25 12 2 26 Press and release the AUDIO key The 1 Two Minute Silence indicator should illuminate and the alarm should be silenced After two minutes the indicator turns off and the alarm sounds again providing the alarm condi tion still exists With the alarm sounding press and hold the AUDIO key until the Au dio Off indicator illuminates Verify that the alarm is silenced Press and release the AUDIO key Verify the indicator shuts off and the alarm sounds With the PROBE OFF PATIENT alarm still sounding press the ALERT RE SET key Verify the message and alert indicators continue to flash but the alarm is silenced Set the AC Mains switch to the 0 Off position Verify the unit operates from battery power provided the battery is substantially charged Place the AC Mains switch back to the position Press the POWER key to turn the monitor off and disconnect the sensor Depress and hold the ALERT RESET key Press the front panel POWER key then release both keys The monitor will power up with the factory default settings in place After the self test is complete turn the monitor off This completes the Functional Test If the monitor and sensor performed as described above
92. are generated Channel I6 Battery Supply Voltage The monitor s internal battery voltage is divided down by RP3 pins 7 8 and RP8 pins 1 5 The voltage at IC33 pin 2 is monitored and if its magnitude is less than a predetermined value encoded in the software the monitor lights and or flashes its front panel battery indicator This provides the user with a low battery warning Channel I7 Red LED Cathode Voltage A low pass filter consisting of RP10 pins 1 2 RP8 pins 1 8 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 open circuit zero volts at IC33 pin 4 or operational approximately 2 5 volts at IC33 pin 4 If not operational display messages such as PROBE RED LED FAILED or ERROR FAULTY PROBE are generated Microprocessor 9 3 14 A Hitachi HD64180RP microprocessor directs the actions of the Model 520A Pulse Oximeter See sheet 2 on 2471 schematic sheet 1 on 2775 schematic The processor IC16 is operated at 6 144 MHz half the12 288 MHz frequency of crystal 1 has 8 bit data bus and a 19 bit address bus the 520A uses only 18 bits The microprocessor also provides two asynchronous serial communication channels a clocked serial I O port and various interrupt and control signals The 5 volt VCC supply to the processor is first sent through inductor FB1 a ferrite bead before powering the c
93. ator output from exceeding 7 5 volts while the fuse F2 provides current limit protection in the event of a regulator circuitry failure The 10 pins 1 8 and 5 6 divider network provides the CPU via IC33 with a means to monitor the LEDSRC status The VA and V12 supplies are regulated to V5 5 volts and V5 5 volts by IC44 and IC43 respectively These supplies are used by the 20 bit ADCS the 8 bit ADC and other circuits associated with them Voltage References 9 3 3 A 2 5 volt precision reference supply generated by IC35 from the 12 volt V12 supply is used as a reference voltage for the ADC chips IC37 and IC34 20 Model 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 The 42 5 volt output from IC35 pin 6 is fed to the non inverting input of amplifier IC36 pin 3 Resistors R32 and R33 combine for a gain of 1 617 that provides a 4 096 volt reference approximately supply 4VREF at IC31 pin 1 The 4VREF is fed to IC30 pin 13 which is set up as a unity gain inverting buffer amplifier therefore the output at IC30 pin 14 is 4 volts This 4 volts is used by IC29 as a reference voltage for VLED Voltage LED and CNTRST Contrast controls See sheet 4 on 2471 schematic sheet 3 on 2775 schematic Preserving RAM and Real Time Clock Data 9 3 4 The NAND gate output at IC11 pin11 will be Low when the monitor is on IC10 pin 2 is High and High when the monitor is off IC10 pin 2 is Low See s
94. cator 28 messages and alarms However if these are ignored a hardware circuit will take over and shut off the monitor before the battery is damaged The pulse width modulator IC9 requires at least 7 6 volts at pin 7 its voltage supply in order to operate This pin typically draws 10 mA of current The resistance of the R63 and Q8 combination is approximately 114 ohms This equates to a voltage drop of approximately1 14 volts Therefore if the battery voltage drops under 9 0 volts approximately IC9 will not have sufficient voltage to operate and will shut down Shutdown of IC9 stops current flow through transformer T1 and the secondary supplies shut down effectively turning off the monitor Model 520A Service Manual 21 Section 9 Electronic Theory of Operation When 9 shuts down its VREF output at pin 8 is pulled Low This forward biases D6 and causes the NAND gate output at IC11 pin4 to go High The 2 flip flop of IC10 is clocked and the High at the D2 input because Q1 is High is transferred to the Q2 output at pin 13 The High at pin 13 Sets the 1 flip flop causing the Q1 pin 2 output to go Low This Low shuts off both MOSFETs Q7 and 8 thereby blocking any supply voltage from IC9 pin 7 Normally pressing the front panel POWER key would clock flip flop 1 at pin 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
95. ce Contract Contact the Novametrix Service Department for contract details 5 Jun 01 Model 520A Service Manual 35 Section 10 Maintenance Cleaning and Sterilization 10 3 Model 520A Monitor 10 3 1 Turn the monitor off and unplug from the AC Mains line before cleaning The monitor can be cleaned and disinfected with solutions such as a 7096 isopropyl alcohol 2 glutheralhyde or 10 bleach solution Then wipe down with a water dampened clean cloth to rinse Dry before use Do not immerse the monitor Do not attempt to sterilize the monitor Finger Sensor 10 3 2 The sensor can be cleaned and disinfected with solutions such as a 7096 isopropyl alcohol 2 glutheralhyde or 10 bleach solution Then wipe down with a water dampened clean cloth to rinse Dry before use Make certain 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 After cleaning the finger sensor verify that the sensor is physically intact with no broken or frayed wires or damaged parts Make certain that the connectors are clean and dry with no signs of contamination or corrosion Do not use broken or damaged sensor or one with wet contaminated or corroded connectors Y SENSOR and Y STRIP Taping System 10 3 3 36 model 520A Service Manual Do not immerse connector on the Y Sensor The Y Sensor may be immersed up to but not including the connector
96. continuous alarm sounds for thirty seconds while the Message Center displays BATTERY EXHAUSTED CONNECT LINE CORD If this alarm message is ignored the monitor displays will shut down and the battery indicator will flash on and off about every 5 seconds If AC power is now restored the monitor will re initialize go through the power up and self test routines and resume normal operation However continued battery operation will eventually activate a hardware low voltage circuit 8 5 volts that shuts the monitor off to prevent damage to the battery Once the unit is shut down with the hardware circuit the AC Mains must be connected and the front panel POWER key pressed before the monitor will turn back on AC Mains Operation 9 2 2 The AC Mains voltage enters the monitor at the rear panel Power Entry Module PEM 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 card Model 520A Service Manual 17 Section 9 Electronic Theory of Operation The filtered switched and fused output of the Power Entry Module is fed to the primary coils of the rear panel mounted system transformer T301 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 DC volts is fed to the main board through fuse F301 to connector E302 and is sw
97. d release to disable Audio Off Audio Off Indicator Flashes yellow as a warning that the audible alarms have been disabled Alert Indicator Flashes red when an alert alarm occurs Continues to flash until condition corrected and ALERT RESET is pressed Alert Reset key Press ALERT RESET to disable any active alert indicators Alerts will reactivate if alert condition still exists AC Power Indicator Illuminates green when the monitor is connected to an AC Mains power source and the rear panel power switch is set to I Figure 1 Front Panel Description PULSE OXIMETER OX YP LE T H WONAMETRIX 14 Powerkey Press POWER to turn the monitor off and on Low Battery Indicator Illuminates red when the monitor is powered from its internal battery and less than 30 minutes of battery power remain Red Alert Bar Flashes red when an alert alarm occurs unless disabled via Options Menu Continues to flash until condition corrected and ALERT RESET is pressed unless unlatched by the user via the Options Menu Front Feet Rubber tipped front feet 2 Kickstand Two position kickstand not shown lifts front of monitor for viewing from above Contrast Press and hold for display contrast adjustment release when desired contrast is obtained Event Press to mark an event in trend memory 5693 90 01 5 Jun 01 6 Rear amp Top Panels Line Cord C
98. dical Systems Inc and may not be reproduced used or disclosed in whole or im part without the written consent of Novametrix Medical Systems Inc DATA BUS ADDRESS BUS To Sheets CONTROL BUS 1 2 and 4 vcc a RP12 O RP12 41 Ok cn AVREF A J189 8 3 v 4 SNDOUT 5 6242 luf Q Q 4 18 2 4 l VREFB 1029 17 Wee 1 32 L le are N 14 pg RFB 18 Sg 1 N Nel te LAs 14 Nea D4 D T 05 AD7528 017 D6 N KJLx Q VNOS 101 3 107 RFA S IN 8 32 768KHz d DACCSw 1571 CS T d 657 C59 22pF 22pF amp DCND AGND Rea T ime CLK 161 IC13 A 104 TAHC573 O SWGND 1627 vec i c29 Mem 12y 2N3906 REND gt m SEE NOTE 8 LPORT 11 20 n V Q LOND 18 AUD CLK J1 3 14 CLK 16 Niger rc md J1 1 ID po p Se 2D NE n 22 42 2 2 cet LINEST 7 42 7 a De SD ON OFF 21 2 15 55 15 N34 css war R 04 3 RP11 7D THLE Ji 5 12 8 DS 128 8D D6 iN 07 Ji 8 4 ALUM 2 T4HCS73 1 14 BTLX AUDx 14 B J2 8 cee Tone Controller 47uF 100uF 1 i CN C53 s2 3 ALUM zerg 9 F C SU ij IC19 R23 ue 13 74HC14 a lt DREQx _ 8 lt 9 Dio S9 PROBUS S9 PROBUS RIS IM 148 Sid S11 SPARE A This supply connects back 612 SPARE 19 mV
99. ditional information Technology Description 1 2 Pulse oximetry is a non invasive method of monitoring the oxygen saturation of arterial blood Oxygen saturation monitoring is intended to be used in a variety of clinical situations including respiratory therapy anesthesia the intensive care unit ICU and neonatal NICU and pediatric PICU intensive care units The Model 520A Pulse Oximeter provides reliable continuous measurement display and alerts for oxygen saturation SpO and pulse rate The monitor can be powered from its rechargeable internal battery or from the AC Mains The Model 520A utilizes sensors containing two light emitting diodes LEDs and a photodiode Each LED emits a specific wavelength of light 660 and 940 nanometers through a pulsating vascular bed to the 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 saturation The Model 520A is calibrated to display functional saturation This differs from the fractional saturation value displayed by most co oximeters Functional saturation is defined as 2 100 Fractional Hemoglobin COHb Carboxyhemoglobin METHb Methemoglobin Functional Saturation This can be considered to represent the amount of oxyhemoglobin as a percentage of the hemoglobin t
100. e offsets TML Two Minute LED drives the 0 LED on the front display AOL Audio Out LED drives the Q LED on the front panel ARL Alert LED drives the LED on the front panel KJL drives Q17 when high which in turn drives the Alert Bar LEDs via J105 BTL Battery Low 2 LED on the front panel DSPBR not used on the 520A OFFDIS sent to the Power On Off section of the circuitry to prevent the monitor from being turned off while writing to RAM Watchdog Timer 9 3 21 The Watchdog Timer provides a system reset function in the event a hardware or software glitch occurs The PEEL IC18 forms the heart of the Watchdog circuit See sheet 2 on 2471 schematic sheet 1 on 2775 schematic At powerup and at specific intervals thereafter the microprocessor outputs a logic high to IC18 pin 8 WDOG Watchdog The WDOG signal combines with other signals within the PEEL and as a result the Watchdog Clear WDCLR open drain output at IC18 pin 12 is continually brought low This discharges the capacitor C46 before it can charge up via RP2 pins 1 and 2 past the input threshold of IC21 pin 9 Model 520A Service Manual 31 Section 9 Electronic Theory of Operation If the WDOG pulse does not appear at regular intervals as the result of a software or hardware problem the RC charges up and IC21 pin 8 goes low producing a Watchdog Time out WDTO input at IC18 pin 11 WDTO combines with other signals within the PEEL and causes the open drain Ma
101. e the test Press the Prev softkey Verify the LED pwr 20 Press the Prev softkey until Adczxxxxx appears verify the value displayed is within the limits specified below Press the Prev softkey again RED Adczxxxxx will appear Verify the value displayed is within the limits specified Press the exit softkey and set the TB500B saturation to 100 and attenuation to 3 RED ADC 5B32 88CB hex IR ADC 3324 ACB7 hex Power the monitor down Power up the monitor by pressing the power button Verify a Monitor performing self test message is displayed then is immediately followed by the main monitoring screen Press the Menu softkey followed by the Avg and 2s softkey then press Run Set the TB500B to the settings in the chart Verify the saturation values are within the specified tolerance TB500B Settings Board Parameters Saturation Attenuation Saturation Pulse Rate 100 3 98 100 601 82 3 80 84 601 62 3 60 64 60 1 72 7 68 76 60 1 92 7 88 96 60 1 Note Verify a visual alert bar flashing and audible alert condition occurs when the saturation is set to 82 Press and hold the audio alert key Verify the audio off LED turns on and the audible alert is silenced Change the TB500B power switch to OFF Verify an Insufficient Light error message is displayed Change the TB500B power switch to ON Verify the error message clears and a saturation and pulse value are displayed Set the TB500B Signal Attenuation t
102. ected by D5 which is now reverse biased the bridge D1 is also reverse biased and prevents T301 from discharging the battery With no voltage at IC2 the LINEST will be low which indicates to the main board that there is no AC power 2726 Power Supply Board 9 2 The 2726 Power Supply Board contains the circuitry needed to power the monitor from the AC Mains line voltage The power supply board also connects to the battery and contains the battery charging circuitry AC Mains and Battery Operation Overview 9 2 1 The Model 520A can be powered from its internal 12 volt battery or from the AC Mains The green sine wave icon front panel indicator illuminates when the line cord is connected and the rear panel power switch is in the 1 On position This indicates that AC Mains power is reaching the power supply that the battery is being 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 position the monitor will operate for up to four hours from its internal 12 volt lead acid battery As the battery voltage runs low 11 5 volts the red battery indicator on the front panel illuminates At this point the AC Mains should be reconnected to power the monitor and charge the battery If the monitor continues to be powered from a battery in a low voltage situation at approximately 11 volts a
103. ed 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 position the monitor will operate for up to four hours from its internal 12 volt lead acid battery As the battery voltage runs low 11 5 volts the red 4 battery indicator on the front panel illuminates At this point the AC Mains should be reconnected to power the monitor and charge the battery If the monitor continues to be powered from a battery in a low voltage situation at approximately 11 volts a continuous alarm sounds for thirty seconds while the Message Center displays BATTERY EXHAUSTED CONNECT LINE CORD If this alarm message is ignored the monitor displays will shut down and the battery indicator will flash on and off about every 5 seconds If AC power is now restored the monitor will re initialize go through the power up and self test routines and resume normal operation However continued battery operation will eventually activate a hardware low voltage circuit 8 5 volts that shuts the monitor off to prevent damage to the battery Once the unit is shut down with the hardware circuit Model 520A Service Manual 15 Section 9 Electronic Theory of Operation the AC Mains must be connected and the front panel POWER key pressed before the monitor will turn back on AC Mains Operation 9 1 2 The AC Mains voltage enters the monitor at the rear panel Power
104. ee Note 4 or 5 4 125V Slo Blo for Value x V7 7 P102 1 2 I 4 VCH 424001 2 MAIN PCB 78105 R15 NOTES 1 UNLESS OTHERWISE SPECIFIED RESISTANCE VALUES ARE IN OHMS 1 8 W 1 i OUT IN 2 IC1 IS THERMALLY COUPLED TO THE CIRCUIT BOARD GND 150 3 CONNECT DGND AND AGND ONLY AT IC1 3 14W 4 2725 SPECIFICATIONS E A COMPONENTS NOT FITTED D3 F301 IC2 R15 P102 B F302 2A SLO BLO C 26 1k 5 2726 SPECIFICATIONS B A F302 1 VERY FAST ACTING B R6 37 4k 6 LAST REF DES USED C8 D5 E302 F302 IC3 J302 L1 Q3 R17 J302 1 a Lx mI DGND 7 VBATT sewwmcesown Novametrix 06 75 2844099 SUPPLY BOARD BATTERY i Medical Systems Inc Drawn R Daniels ecked MR 1 Barnes Industrial Park Road 03 06 26 97 _ 30 95 Wallingford CT USA 06492 E Harvie JApproved A Document Number ode Rev Eng 7Nov95 7Nov95 2725822 o o0 372 30095 Fie 2725 260306 This document contains Information which is of Novornstrix Medical Inc and may be reproduced used or diwclowed in whole or in port wothout the written of Novametrix Medical Systems ino P102 F1 amp F2 P ER FUSE YSN u XXZOZL zZ nsd QGXIHI3NVAON eC ics 818 T EC E R5 R14 L1 COIL SOLDER SIDE C1 T301 amp 501 ARE MOUNTED ON
105. eep indicating the audio is operational 1 See Section 13 Accuracy Test on page 55 for tests that check the accuracy of the monitor 2 The AC indicator will illuminate only when the monitor is connected to line power and the rear panel Power switch is On 0 Model 520A Service Manual 51 Section 12 Functional Test 12 2 9 12 2 10 12 2 11 12 2 12 12 2 18 12 2 14 12 2 15 12 2 16 12 2 17 12 2 18 Briefly display Parameters Reset To Factory Default 5 Briefly display MONITOR PERFORMING SELF TEST display MONITOR PERFORMING SELF TEST The message center will display ERASE STORED TRENDS for ap proximately 10 seconds Verify the Message Center flashes CONNECT SPO2 PROBE while no sen sor is connected to the monitor Press the ALRT key to display the SET ALERT LIMITS menu Press the 4 down arrow key several times and verify the Saturation dis play upper alert limit decreases each time the key is pressed Press the RUN key Note the displayed Saturation alert limit settings Turn the monitor off and back on again After the self test is complete verify the monitor remembered the alert limit values Press the Menu key and then the AUDIO key Press the ALERT key to display the SET ALERT VOLUME menu Press and hold the 4 key and verify the volume of the tone decreases as the volume display decreases to 01 Press the
106. electronic circuits within the Novametrix Model 520A Pulse Oximeter monitor do not require scheduled calibration or service However in order to maximize battery life the monitor s internal battery should be exercised monthly Novametrix recommends the following maintenance schedules e Cleaning and Sterilization Perform as required See Cleaning and Sterilization on page 36 Battery Life and Maintenance See Battery Life and Maintenance on page 37 Functional Test The test may also be used as a spot check to verify system operation if reports of malfunctions are received The test verifies overall functional integrity of the monitor and sensors Section 12 Functional Test on page 51 Accuracy Test This test which requires the use of the Model TB500B Sensor Simulator verifies the performance accuracy of the Model 520A If the monitor does not pass the accuracy test the Calibration and Adjustment test should be performed See Section 13 Accuracy Test on page 55 Calibration Tests These tests contain information on calibrating the electronic circuits within the Model 520A and should only be performed if the monitor fails to pass the Functional and or Accuracy Tests Only qualified service personnel should attempt to perform the Calibration and Adjustment Test See Section 14 Calibration Tests on page 59 1 Atthe customer s request Novametrix will provide repair and calibration services under the terms of a Servi
107. ensor 10 ft sensor cable 90 day warranty Finger Sensor use with DB 9 Sensors 6 feet 1 yr warranty Finger Sensor use with DB 9 Sensors 3 feet 1 yr warranty Y Sensor use with DB 9 Sensors 6 feet 90 day warranty Y Sensor use with DB 9 Sensors 3 feet 90 day warranty SENSOR MANAGEMENT PLANS Select a Finger Sensor Y Sensor Management Plan for each SuperBright Pulse Oximeter The plan you select determines the length of coverage 36 or 60 months How the Plans Work Included in each Plan are TWO sensors one for immediate use the other one for back up 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 For each Pulse Oximeter a plan is purchased for the warranty on the monitor is also extended to the length of the Plan a pre contract inspection may be required Replacement sensors provided under terms of the Plan shall carry the remaining Plan warranty replacements do not extend the warranty Y 36 Plan The Plan length is 36 months Includes 9 boxes of any Y Strip Taping Systems 5693 90 01 Model 520A 5 Jun 01
108. eooy Q3HOLV1S 1H3 lV LAS SSeJg 5 195 jejeurejed 1oejes o 145 ASN T 2 145 145 4 ON IWININ QQ WW HH SLIIATT LH3 IV NIVL3H AL S 0 0 lnpoN Bojeuy 1ndino 5195 A nue N ON S3A TINA 0832 NnH 330 Olanv MOTIV NNaW NNAW NIV NIV SLAW 9010 8425 NOY L SNOILdO 1H31V 2 SNOILdO HOLINOW A 5 Jun 01 Electronic Theory of Operation The electronic theory of operation of the Model 520A Pulse Oximeter monitor is detailed in the subsections below Refer to Section 19 Schematic and Assembly Drawings on page 93 for further information 2472 Power Supply Board 9 1 The 2472 Power Supply Board contains the circuitry needed to power the monitor from the AC Mains line voltage The power supply board also connects to the battery and contains the battery charging circuitry AC Mains and Battery Operation Overview 9 1 1 The Model 520A can be powered from its internal 12 volt battery or from the AC Mains The green v sine wave shaped front panel indicator illuminates when the line cord is connected and the rear panel power switch is in the On position This indicates that AC Mains power is reaching the power supply that the battery is being charged and that if the monitor is turn
109. g up Remove replace the various assemblies as needed IMPORTANT The monitor will be damaged if power is applied to it while cables or assemblies are improperly connected After the monitor is fully assembled perform safety checks Reconnect the line cord to the AC Mains and to the monitor Set the AC Mains switch to the On position Verify the indicator illuminates Turn the monitor on Measure the AC leakage current from the monitor s chassis to earth ground with the monitor grounded ungrounded and ungrounded reverse polarity When operating from 100 120 VAC no leakage current may be greater than 25 If operating at 220 240 V AC no leakage current may be greater than 50 uA With the monitor grounded measure from the AC line to the SaO Input connector pins When operating from 100 120 VAC no leakage current may be greater than 25 WA If operating at 220 240 no leakage current may be greater than 50 Model 520A Service Manual 43 Section 10 Maintenance Changing System Software 10 7 The system software is contained in EPROM 1 17 on the 2775 Main Board New software releases are made available from time to time These new releases may add features or be maintenance upgrades To install a new EPROM 1 Follow the steps listed in Assembly Exchanges on page 41 to open the monitor Be sure to disconnect J102 from the 2775 Main Board to ensure that there is no power on the board while c
110. gh when neither LED is being driven causing 015 to turn on With 015 conducting any charge at C90 is discharged to ground and the next pulse will charge C90 from a known level If it were not for Q15 any charge remaining on C90 from the previous pulse or from ambient light reaching the photodiode would be added to the charge from a new pulse creating measurement errors Calibrating the 20 Bit Analog to Digital Convertors 9 3 10 The 20 bit ADCS are calibrated as part of the system self test which occurs each time the monitor is turned on At power up the microprocessor sets the CAL line high The System Calibrations input 5 is set high and SC2 is reset to a logic low 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 and SC2 inputs The high at SCI and the low at SC2 cause the Data Sampling Controller 1 42 to set INSIG high and reset SIGND to a logic low The high INSIG opens the switch at IC41 pin8 so that IC41 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 IC41 pin9 and as a result the input to the C90 R59 high pass filter and thus the entire ADC input circuitry is brought to ground potential The CAL line which went high at power up is reset low and ADCs IC34 and IC37 begin their calibrat
111. hanging System Software 2471 Main 44 Tro bleshooting UU milii xai is x mx x Etna ein 47 priui date Ia 51 51 Monitor Functional Test iet orent rideo ta tees 51 Special Power Up Functions 53 Model 520A Service Manual V Section Contents ACCURACY 55 INTODUCTION 55 Monitor Accuracy 55 Galibration dux Editus Sors 59 INTRODUCTION 5 i Pp eda Sr da a 59 Equipment Required and Test Setup 59 gt s na A ases scere as 60 Testin uuu 63 Connecting to other Equipment J 65 Connecting the Seiko DPU 414 Thermal 65 Configuring the Seiko DPU 414 65 Setting the DIP switches 65 Connecting the ThinkJet Printer 67 Connecting the Model 315 67 Connecting Seiko DPU 411 Thermal Printer 68 Analog Output 69 Analog Output Setup cde Lope Lacs era eran cde aas 7
112. hanging the system software 2 Usea PLCC extraction tool to carefully pry the EPROM IC17 from the socket 3 Install the update EPROM into the socket Align the EPROM so that pin 1 is inserted into pin 1 of the socket Changing System Software on 2471 Main Board 10 7 1 The system software is contained in EPROM 1 17 on the 2471 Main Board New software releases are made available from time to time These new releases may add features or be maintenance upgrades To install a new EPROM 1 Follow the steps listed in Assembly Exchanges on page 41 to open the monitor Be sure to disconnect J102 from the 2471 Main Board to ensure that there is no power on the board while changing the system software 44 Model 520A Service Manual 5693 90 01 Changing System Software 2 Use small flat blade screwdriver or IC extraction tool to pry the EPROM from the socket be careful not to bend the pins IC17 System Software XX 40 S14G 191 XX 61 Pin 1 orientation Figure 11 Changing the System Software 3 Install the new EPROM into the socket Align the EPROM so that
113. hannel 1 low A Red channel read starts when IC34 pin 16 Chip Select Channel 2 is brought low On the falling edge of the ADC s CS the output word s MSB most significant bit appears at 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 1 e the other ADC channel The Serial Clock speed is controlled through the digital board PEEL IC18 This clock rate is significantly slower than the ADC sampling rate As a result the ADC rewrites its output buffer with new information at a faster rate than the data can be read from the buffer No conflict occurs however because while CS is low during the read cycle the ADC 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 to return high and the ADC resumes its sample convert overwrite buffer cycle Sensor Status Decoding and Conversion 9 3 12 The microprocessor monitors several sensor parameters in addition to the Red and Infrared data channels It monitors the status parameters as well as the voltage of the monitor s internal battery T
114. hat can be oxygenated Dysfunctional hemoglobins COHb and are not included Model 520A Service Manual 1 Section 1 ntroduction Pulse Rate is calculated by measuring the time interval between detected peaks of the infrared light waveform The inverse of this measurement is displayed as pulse rate The oxygen saturation and pulse rate values are displayed on monitor s displays The displayed values are updated once each second Presence of a pulse is shown as a waveform on the display and indicated audibly by a user selectable beep The Model 520A must be used in conjunction with SuperBright Sensors These sensors have an 8700 series part number e g 8776 or 8791 An INCOMPATIBLE PROBE display message will indicate a non SuperBright Sensor e g 86xx series is in use Conventions Used In This Manual 1 3 The following conventions will be used throughout this manual Normal text will be shown in this type Message Center alerts and displays willbe shown in this type The names of the front panel pushbuttons keys will be shown in this type Acknowledgments 14 SuperBright Y STRIP and Y SENSOR are trademarks of Novametrix Medical Systems Inc SARAcap is a registered trademark of Allegheny International Medical Technology Inc PPG Biomedical Systems 2 Model 520A Service Manual 5693 90 01 5 Jun 01 Patient Safety The OXYPLETH Pulse Oximeter Monitor Model 520A SpO Input is e
115. he 8 to 1 multiplexor IC33 decodes the AOAUX A2AUX input address lines and connects one of eight status parameter inputs labeled channels 0 7 at IC33 to the multiplexor output at IC33 pin 3 Resistor R29 and diode D13 prevent negative voltages from reaching the input to the analog to digital convertor IC31 IC31 is an 8 bit analog to digital convertor with a serial data output While the IC31 Chip Select CS input is high the CLK input and DOUT output are in 3 state mode When CS is brought low under processor control the most significant bit D7 of the PREVIOUS data conversion becomes available at the DOUT pin The 26 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 remaining bits D6 DO are shifted out on subsequent falling edges of CLK input On the clock pulse following the one that shifts out the least significant bit DO the CLK and DOUT lines are returned to 3 state and the ADC performs new conversion based on the input it receives from the IC33 channel selected by the AO0AUX A2AUX input address lines The ADC sample convert store result cycle is based on internal chip timing and not the CLK input which along with CS only controls serial data output Thus the CS line is free to return high once the ADC cycle begins Sensor Status Parameters 9 3 13 The sensor and battery status parameters input to the multiplexor IC33 are described below Note that channel number refers not to t
116. he IC33 pin number but to the signal label e g channel IO signal resides at IC33 pin 13 Channel I0 ADCV 12 This is an extra input to the multiplexer IC33 pin 13 It is unused as of this writing Channel I1 Auxiliary Input This is an extra input to the multiplexer IC33 pin 14 It is unused as of this writing Channel I2 Photodiode DC Level Resistors R40 8 pins 1 2 and capacitor C97 form 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 IC40 pin 1 This channel IC33 pin 15 is used in determining ambient light interference If this line is examined while the sensor s Red and Infrared LEDs turned off then any DC level at IC40 pin 1 must be the result of ambient light impinging on the photodiode If the DC shift is in excess of limits set in the software a Light Interference message appears on the monitor s display Channel I3 Sensor LED Supply Voltage This channel at IC33 pin 12 monitors the sensor LED supply voltage through a voltage divider consisting of RP10 pins 5 6 and 8 pins 1 8 If a fault occurs that causes the LED supply fuse F2 to blow or if the sensor wires are shorted this channel reports the condition and the Message Center displays PROBE FAILURE Channel I4 Incompatible Probe Detection The input at IC33 pin 1 provides the processor with an incompatible probe indicator words probe and se
117. he line cord set the switch on the rear panel to the I On position ensure that the green indicator on the front panel is illuminated and allow the monitor to charge for 24 hours before switching it on Mains Voltage Configuration 10 5 The rear panel power entry module indicates the mains voltage setting for the monitor Check that the voltage is correct before attaching the AC line cord and powering the monitor The Model 2001 can be set to operate from 100 120 VAC 50 60Hz or 200 240V AC 50 60Hz Instructions for fuse replacement and changing the mains voltage setting follow CAUTION Replace fuses with same type and rating Verify proper fuse value for mains voltage setting see table below Fuse Replacement 10 5 1 1 Check that the monitor is OFF 2 Setthe rear panel power entry module switch to OFF O Remove the AC line cord from the power entry module 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 Mains Voltage Fuses Slo Blo 100 120 VAC 0 5 A 250V 200 240 VAC 250mA 250V Model 520A Service Manual 37 Section 10 Maintenance lt Fuse housing Fuse access door 4 Pry the fuse housing out from the power entry module zB
118. heet 4 of 5 on schematic This Power On signal is used to prevent corruption of RAM and clock data when the monitor is turned off It does this by going High and therefore denying CPU access to the RAM and clock chips so that as the power supplies crash when the monitor is turned off the CPU cannot send erroneous data to the chips Whenever the CPU is writing information to the RAM or Real Time Clock chips the CPU momentarily sends the OFFDIS Off Disable line High The High going level appears at IC11 pin 2 Since the monitor is powered IC11 will be High This means IC11 pin3 momentarily goes Low Q6 starts to conduct and IC10 4 goes High In this reset condition the Q1 output 1 flip flop of IC10 pin 2 will be held high even if the user presses the POWER key and clocks the flip flop In effect the CPU is not allowing the monitor to be turned off The Low at IC11 pin3 will last for the duration of the RC time constant set by C21 and pins 5 6 These values were chosen to produce a time out longer than the time necessary to complete the write to RAM or Real Time Clock operation After the RC time out IC10 pin 4 returns Low and a press of the POWER key will toggle the Q1 output of IC10 and the monitor will turn off This is done to prevent corruption of RAM and Real Time Clock data Low Battery Voltage Shutdown 9 3 5 The CPU monitors the battery voltage and provides the user with a low battery indi
119. hip at IC16 pin 32 Memory 9 3 15 The Model 520A system software is located at IC17 27C010 EPROM The 32 K byte RAM 20 stores trend data system power up settings averaging times serial output parameters etc and provides an area for system scratchpad memory requirements Since IC20 is powered from the VBACK supply RAM memory is retained when the monitor is turned off and it becomes available again when the monitor is turned back on 28 Model 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 The ROM at IC17 is read when its Chip Enable line IC17 pin 22 is brought low by the ROMCS signal at IC25 pin 3 and the processor brings its Read line IC16 pin 63 low thereby activating the ROM Output Enable line at IC17 pin 24 Under these conditions ROM data from the specified address bus location is made available to the data bus for use by the processor The RAM IC20 is activated when its Chip Select line RAMCS IC20 pin 20 is brought low via IC25 pin 8 When the ME line at IC25 pin 5 is low and the inverse of address line A17 at IC25 pin 4 is low output pin 6 of IC25 will go low This in turn will drive IC25 pin 10 low with low at IC25 pin 9 IC25 pin 8 will be low RAMCS If at that time OE IC20 pin 22 is low a RAM Read occurs whereas a RAM Write will occur if WE IC20 pin 27 is low Real Time Clock RTC 9 3 16 A Real Time Clock provides the Model 520A the ability to
120. in 7 GNDI Interface ground Pin 20 DTR Data Transmit Ready output Pin 21 22 GNDI Interface ground Pin 24 25 VDI Interface 5 volts Figure 18 Analog Output Module Pinouts Analog Output Setup 15 6 A CALIBRATE RECORDER menu within the Model 520A software allows the user to easily calibrate analog recorders to the voltage levels produced by the Analog Output Module To access this feature 1 With the monitor in normal running mode press and hold the MENU key until SPO2 SETUP OPTIONS appears on the display Press the NEXT key until 70 Model 520A Service Manual 5693 90 01 Analog Output Setup MONITOR OPTIONS 2 appears on the display Select REC for CALIBRATE RECORDER menu SATURATION PULSE OXIMETER OX YPLETH wWoveneiRIX PULSE RATE beats min Low ne BAT 6L jo m J E _ E MODEL 520A Press and hold for 5 seconds while in normal running mode Figure 19 Analog Output Setup 2 The Recorder Outputs menu will be displayed CALIBRATE RECORDER RUN ZERO HALF FULL PREV WWE EE RUN return to Monitoring Mode ZERO set analog outputs to O volts 0 0 volts 0 bpm 0 volts pleth 0 volts HALF set analog output voltages to half scale 5096 0 50 volts 125 bpm 0 50 volts pleth 0 50 volts FULL set analog output voltages to full scale 100 1 00 volt 250 bpm 1 00 volts pleth 21 00 volts PREV returns to MONITOR OPTIONS 2 menu
121. ion cycles Because the analog input circuitry is grounded via SIGND only circuit offset voltages can be present at the pin 9 AIN input 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 IC41 pin9 to open and IC41 pin8 to close The photodiode signal can now reach the ADCs See Sensor Photodiode Return Path on page 24 Model 520A Service Manual 25 Section 9 Electronic Theory of Operation 20 Bit Analog to Digital Conversion 9 3 11 Data from the Red and Infrared channels is sampled by the 20 bit measurement ADCs 4 and 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 convertor continuously samples its input converts the value to a digital word puts the word in its output buffer overwriting previous buffer contents then repeats the process by 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 CLKSEQ input The microprocessor starts a read cycle of the Infrared channel by bringing IC37 pin 16 Chip Select C
122. isting of R59 and C90 As shown in Figure 3 the ASAMP signal is active whenever either sensor LED is turned on This causes 15 to turn off and the charge at C90 passes through the unity gain buffer to IC40 pin 7 If the signal at IC40 pin 7 is the product of the Red LED being turned on then RDSMP from 1242 pin 12 will go low and close the switch at IC41 pins 2 3 thereby presenting the signal to a sample and hold circuit consisting of R54 and 1 The Model 520A uses SuperBright sensors If a non SuperBright sensor is connected IC40 pin 1 will go negative a condition that causes an Incompatible Probe message to be displayed 24 Model 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 C100 that maintains the signal until next sample pulse arrives a gain stage IC38 pin 1 a filter divider network C87 R45 and R46 and finally to the Red channel Analog to Digital Convertor ADC IC34 If the signal at IC40 pin 7 is the product of the Infrared LED being turned on then ISMP from IC42 pin 13 will go low and close the switch at IC41 pins 14 15 thereby presenting the signal to a sample and hold circuit consisting of R55 and C96 that maintains the signal until next sample pulse arrives a gain stage IC38 pin 7 a filter divider network C88 R49 and R50 and finally to the Infrared channel Analog to Digital Convertor IC37 Again referencing Figure 3 the ASAMP line returns to a logic hi
123. itched to the battery charging regulator pin 5 through 1 Biasing for is accomplished by C2 R2 C8 and when AC power is applied When running on battery power is biased off by R2 and this prevents the battery from trying to power the battery charger regulator and IC2 that informs the monitor of the loss of AC The output of switching regulator pin4 is rectified and filtered by D4 C4 and L1 then fed to the battery through current sense resistor and fuse F302 to 7302 pin 1 The battery float charge voltage is maintained at 13 2 volts except for fast charge which is regulated 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 120mA of current IC3 pin 7 goes high which biases Q2 on this in 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 control which now consists of R12 R13 and R14 setting the voltage to 13 2 volts When more than 600mA of current flows through IC3 pin 1 shorts pin 2 to ground which shuts off until its next switching cycle when the current reaches a safe level IC3 pin 1 allows to remain on
124. itches 1 2 5 6 up on and 3 4 7 8 down off RS 232C switches 1 up on and 2 3 4 5 down off DIP SWITCHES MODE RS 232C A AYYAAYY AYYYY 12345678 12345 MODEL 520A REAR PANEL MODEL reum PRINTER B gl RS232 C INTERFACE AC POWER 5331 00 CABLE POWER SWITCH e Figure 13 Connecting the ThinkJet Printer 3 Connect the interface cable PN 5331 00 to the Model 520A RS232C connector and to the ThinkJet If Model 520A has an Analog Module attached connect to the module s RS232C connector 4 Connect the printer s AC input and turn the printer on 5 Select T Jet ThinkJet from the Ser Serial portion of the Model 520A Options Menu 6 Referto the ThinkJet Owner s Manual for further printer details Connecting the Model 315 Printer 15 3 To connect the Model 315 Printer to the Model 520A 1 Setthe dip switches on the Model 315 rear panel The settings are 1 5 up off 6 7 down on and 8 up off 5 Jun 01 Model 520A Service Manual 67 Section 15 Connecting to other Equipment 2 Connect the printer interface cable PN 4913 00 to the RS232C connector on the Model 520A Connect the other end of the cable to the Model 315 DIP SWITCHES MODEL 520A REAR PANEL 12345678 MODEL 315 REAR PANEL
125. itors RS232 connector and to the printer s serial input connector the 9 pin D connector 2 Connect the AC adapter and turn the printer on Configuring the Seiko DPU 414 Printer 15 1 1 The Seiko DPU 414 Thermal Printer Cat No 9140 00 must be configured to communicate with the OXYPLETH When properly configured the Seiko printer will retain the settings even when turned off 1 Slide the printer s power switch to OFF 2 Press and hold the ON LINE button then slide the power switch ON P Release the ON LINE button after the list of current settings starts printing out Setting the DIP switches 15 1 2 1 The printout of the current settings is followed by the prompt Continue Push On line SW Write Push Paper feed SW To change the DIP switch settings push the ON LINE button to leave the DIP switch settings unchanged push the FEED button Model 520A Service Manual 65 Section 15 Connecting to other Equipment 2 DIP SW 1 will print Enter the new settings for switches 1 8 ON is set by pushing the ON LINE button once OFF is set by pushing the FEED button once The printer will confirm each selection Repeat for DIP SW 2 and 3 The DIP switch settings for the Model 520A are as follows DIP SW settings mode Dip SW 1 1 OFF Input Serial 2 ON Printing Speed High 3 ON Auto Loading ON 4 OFF Auto LF OFF 5 ON Setting Command Enable
126. large objects such as the bed rail 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 Model 520A Service Manual 5 SATURATION Front Panel Saturation Display Area SpO2 and alert limit settings are displayed here Pulse Rate Display Area Pulse Rate and alert limit settings are displayed here Message Center area where System messages are displayed The functions of the softkeys 4 are annotated here Softkeys 1 5 Softkeys 1 5 left to right cause the action annotated in the lower half of the Message Center to occur Carrying Handle monitor carrying handle molded into case Sensor Input Connector Connect SuperBright Sensors here Press tab on sensor connector to remove sensor Do not twist connector Two Minute Silence Indicator Illuminates yellow when the AUDIO key is pressed SpO2 and Pulse Rate alarms are silenced for two minutes 6 Model 520A Service Manual 10 11 12 Audio key Press and release AUDIO to turn on off the two minute silence function Press and hold approx 3 seconds AUDIO to enable the Audio Off feature unless disabled via Options Menu Press an
127. lectrically isolated Patient leakage current flowing from the instrument to ground is limited to less than 10 at 120 VAC 60 Hz Patient isolation is greater than 10 MQ 2500 VAC rms at 60 Hz For maximum patient and operator safety the following are recommended Failure of Operation If the monitor fails to respond as described do not use it until the situation has been corrected by qualified personnel Keep OXYPLETH and its accessories clean Do not operate OXYPLETH when it is wet due to spills or condensation Do not operate OXYPLETH if it appears to have been dropped or damaged Connect the line cord only to a grounded hospital grade outlet OXYPLETH 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 Care should be exercised to assure continued peripheral perfusion distal to the SpO gt sensor site after application Components of this product and its associated accessories which may have patient contact are free of latex Model 520A Service Manual 3 3 Warnings WARNING 4 520A Service Manual Indicates a potentially harmful condition that can lead to personal injury Explosion Hazard Do NOT use OXYPLETH in the presence of flammable anesthetics Use of this instrument in such an environment may present an explosion hazard Electrical Shock Hazard Always turn
128. lip This clip can be set around the line cord strain relief so that the cord cannot be pulled out of the connector Line Cord Connector The AC Mains line cord attaches to the monitor here Fuse Compartment The AC Mains line fuse s are inside this compartment Pry open with small screwdriver AC Mains Voltage The currently selected AC Mains input voltage is identified here un i 0 700 240 VAC 50 50 Hz 40 VA 0 120 LCD U 1 2 250 510 810 RS2 2G NOVAME Rix ACCESSORIES NOVAMETRIX MEDICAL 9 WALLINGFORD CONNECMICUT U S CAUTION FEDERAL TO SALE DISTRIBUTION A LICENSED MEDICAL PRACTITIONER CAUTION EQUIPMENT MUST GROUNDED AVOID DANGEROUS ELECTRICAL LAW RESTRICTS THIS DEVICE OR USE BY OR ON ALL TIMES TO SHOCK riarann TEMS ns THE ORDER OF DANGER EXPLOSION THE PRESENCE OF FLAMMABLE ANESTHETICS DANGER RISQUE D EXPLOSION NE PAS EMPLOYER EN ANESTHESIQUES HAZARD DO NOT USE IN PRESENCE D 5 CAUTION ELECTRIC SHOCK HAZARD DO REMOVE COVERS OR PANELS REFER SERVICING TO QUALIFIED SERVICE PERSONNEL 10 AC Mains Power Switch With switch in O position AC Mains voltage does not enter monitor With switch in I position Mains voltage allowed into monitor to power unit and or charge internal battery
129. m 581565 484529 VOLTAGE REGULATOR 5V 100MA 1 2 484559 VOLTAGE REGULATOR FLOW 30 2 C1 D1 1301 4 J301 ARE MOUNTED ON SOLDER SIDE OF PC BOARD 486805 IC DUAL VOLTAGE COMP LOW POWER Ic3 515083 FUSE W FUSEHOLDER 1A 125V V FAST ACTING F302 515085 FUSE WITH FUSEHOLDER 2A 125V SLO BLO F301 600034 RIBBON CABLE ASSY 4 PIN 4 INCHES LONG NOTES 1 DENOTES THRU HOLE COMPONENTS 2 FOR TEST PROCEDURE SEE A2726 04 sema TTE POWER SUPPLY BOARD ASSY MODEL 5154 58 NOVAMETRIX 520A 1265 amp 7100 MEDICAL SYSTEMS INC WALLINGFORD CT U S A 05492 JTAugOS TNov95 SUE ORAWNG NO CODE MFG ENGA EH APPROVED AE 0 2726 01 06 00 5 UNLESS OTHERWISE SPECIFIED DIMENSIONS ARE IM INCHES mm BREAK ALL SHARP EDGES TOLERANCES imm t FRAC i t HOLES 4 007 003 mm 18 08 ANG BBBBBDBBB Isolation Barrier T301 D1 5 1 1 i 6 LT1076 25uH CMSH5 100 C3 0 1uF D4 CMR3U 01 SEE NOTE 3 R6 See Note 4 or 5 for Value TRANSFORMER Dual Primary D2 MBRS140T3 K Q1A Si4539 R2 C8 C2 249k 10uF 220uF Elect 35V R13 61 9k FB R12 Q2 R11 R14 215 332k x C6 R5 R9 0 1uF 100k 100k E302 D3 F302 F301 2A CMSH5 100 S
130. nalog to Digital Convertors on page 25 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 supply board in order to keep power supply switching spikes from interfering with data sampling operations Sensor LED Drive Circuits 9 3 8 The VLED line voltage is derived from IC30 pin 8 which is controlled by the Digital to Analog Converter IC29 See sheet 4 on 2471 schematic sheet 3 on 2775 schematic When address line AO is high IC29 pin 6 and both IC29 pin 16 and DACCS IC29 pin 15 low the D A Converter is enabled The data on lines Model 520A Service Manual 23 Section 9 Electronic Theory of Operation D0 D7 IC30 pins 14 7 now control the output voltage of IC30 pin 8 VLED based on the VREFB voltage on IC29 pin 18 When the RDLED signal at IC42 pin 18 goes low logic 0 Q14 turns off and the Red LED signal VLED from IC30 pin 8 at R37 is divided by R37 and R41 finally causing IC36 8 to go high This positive output turns Q11 on and current flows from the LED source LEDSRC through the Red LED in the sensor it turns on returning as LEDISK LEDI sink across Q11 and the current limiting resistor R53 to ground See sheet 3 on 2471 schematic sheet 2 on 2775 schematic When RDLED returns high logic 1 014 is biased on forcing IC36 pin8 to ground potential Q11 is biased off and as a result the
131. ne is disabled On the rising CKS signal a CLKS output pulse at IC18 pin 14 is sent as a serial clock input to the ADC selected by the decode lines Decode results are shown below 1 Decode 0 0 RedLED 20 bit ADC 0 Infrared LED 20 bit ADC 1 1 Sensor Status 8 bit ADC 1 0 Internal CSI O signal TEND Table 2 CSI O Decode Lines Successive CKS CLKS pulses cause the ADC data to be shifted out of the ADC most significant bit first along the serial data line SDATA to the CPU serial input RXS at IC16 pin 52 32 Model 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 After receiving the correct number of bits for the ADC being read the CPU changes the 1 and decode lines and exerts the Next line NEXT at IC18 pin 9 low This restarts the serial data shifting out of the newly selected ADC After all three ADCs have been read the CPU sets the AA1 and AAO decode lines to exert the internal TEND signal and set the 8 bit ADC to the next channel so that it has time to settle before the next read of the ADC This re enables the CPUINIT line At this point the CSI O controller is reset awaiting an INTSMS pulse to begin the cycle again RS232 Serial Communication 9 3 23 The Model 520A supports serial RS232 communication with external devices via the monitor s rear panel connector Signals to and from the rear panel RS232 connector are electrically isolated from the rest of the
132. nitor by pressing the power button Safety Testing 14 4 14 4 1 14 4 2 14 4 8 14 44 5 Jun 01 Apply 1 5 KV for 60 seconds between the shorted hot and neutral leads of the power cord and chassis ground Apply 4 KV for 60 seconds between the shorted hot and neutral leads of the power cord and shorted saturation test jack Apply 1 5 KV for 60 seconds between the shorted saturation test jack and the chassis Measure the leakage from chassis gnd to ref gnd with the monitor grounded ungrounded polarities reversed ungrounded With the monitor grounded measure the leakage from shorted probe to 120VAC 60Hz Model 520A Service Manual 63 Section 14 Calibration Tests This page intentionally blank 64 520A Service Manual 5693 90 01 5 Jun 01 1 b Connecting to other Equipment The Model 520A Pulse Oximeter communicates with external equipment via its rear panel 25 pin D style female connector The monitor can be connected to RS232 compatible digital equipment If the optional Analog Output Module is connected the monitor can output to analog devices such as strip chart recorders Refer to the Model 520A Pulse Oximeter User s Manual Catalog No 5693 23 for further information on the RS232 and analog outputs listed below Connecting the Seiko DPU 414 Thermal Printer 15 1 To connect a Seiko DPU 414 Thermal Printer PN 9140 00 to the OXYPLETH 1 Connect the 9085 00 interface cable to the mon
133. nsor are interchangeable The photodiode output voltage at IC40 pin 1 will be positive if a SuperBright sensor is connected to the monitor This positive signal passes through the high pass filter of C73 and RP10 pins 7 8 to the amplifier inverting input IC36 pin 6 where it is summed with the 5 volt output from IC43 The resultant voltage at pin 1 will be approximately 2 81 volts with no photodiode input This voltage drops as the positive photodiode signal at IC40 pin 1 increases If the IC40 pin 1 signal goes negative as would happen if non SuperBright 8600 series sensor were connected to the monitor Model 520A Service Manual 27 Section 9 Electronic Theory of Operation the cumulative effect of the 5 volts and the negative photodiode signal passing through D14 and R34 would be to send the IC36 pin7 output to its positive rail 12 volts The processor recognizes this higher voltage and causes an INCOMPATIBLE PROBE message to displayed in the Message Center Channel I5 Infrared LED Cathode Voltage A low pass filter consisting of RP10 pins 3 4 pins 1 7 and C89 provides a means to measure the cathode voltage of the sensor s Infrared LED If the channel at IC33 pin 5 is sampled the monitor can determine if the LED is open circuit zero volts at IC33 pin 5 or operational approximately 2 5 volts at IC33 pin 5 If not operational display messages such as PROBE I R LED FAILED Or ERROR FAULTY PROBE
134. o 1 Verify a Probe Off Patient message is displayed Set the TB500B Signal Attenuation to 3 Verify the error message clears and a saturation and pulse value are displayed 5693 90 01 Safety Testing 14 3 20 14 3 21 14 3 22 14 3 23 14 3 24 14 3 25 14 3 26 14 3 27 14 3 28 Set the TB500B Saturation to 0 Verify a Low_Signal Strength message is displayed Set the TB500B Saturation to 100 Verify the error message clears and a saturation and pulse value are displayed Press the TB500B Red Open button Verify a Probe Faulty message is displayed Release the Red Open button Verify the error message clears and a saturation and pulse value are displayed Press the TB500B Infrared Open button Verify a Probe Faulty message is displayed Release the Infrared Open button Verify the error message clears and a saturation and pulse value are displayed Disconnect the TB500B from the saturation input connector Verify a Connect SPO2 Probe message is displayed Set the current time date Press and hold the Menu softkey Press the Next softkey until Monitor Options 2 appears Press the Clock softkey Use the appropriate softkeys to set the correct Time Mins Day Month and Year Set the mains switch to verify the green LED on the front panel goes out Verify that the monitor continues to function on battery power without interruption Power down the mo
135. o that the printed side of the correct voltage faces you The voltage selections are pictured below OR Figure 7 Power Entry Module Voltage Selection Adjustment 5 Snapthe Voltage Selector Drum back into the PEM Be sure that the Voltage Setting Indicator shows the proper voltage Close the Fuse Access Door Assembly Exchanges 10 6 Disassembly should be performed by qualified personnel Follow proper grounding procedures to avoid damage to internal components from static discharge 5 Jun 01 Model 520A Service 41 Section 10 Maintenance 1 Turn the Model 520A Off Disconnect the line cord and sensor Remove the four cover screws from the bottom cover Holding both case halves together flip the monitor right side up Remove Line Cord A n Figure 8 Removing the Top Cover 2 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 Bar lens aside with the cover for safe keeping P109 Speaker P102 Power Supply J109 2471 Main Board P105
136. odule open ended 6 ft frs Analog RS232 Output Option Kit for Model 515B if ordered at time of purchase Cable 4 for 2736 00 Analog Output Option Kit open ended 6 ft Model 520A Service Manual 77 Section 17 Accessories Catalog No 5334 00 5335 00 5726 00 9140 00 400052 300017 9085 00 420034 420016 7106 10 7104 10 600026 4941 00 4942 00 4943 00 5266 00 6147 00 6455 00 6455 25 6480 00 6480 25 8933 00 8936 00 9400 81 5693 81 6500 81 6550 81 78 Model 520A Service Manual Description Cable Serial Output to Personal Computer PC with 25 pin connector Cable Serial Output to Personal Computer PC with 9 pin connector Cable Analog Output Module 9622 01 to Aequitron 9500 Series Por Monitor He um Thermal Printer Seiko DPU 414 with battery pack AC Adapter for Seiko DPU 414 Printer 120 Printer Paper for Seiko DPU 411 414 Printer 2 rolls per box Printer Cable for Seiko DPU 414 Printer 9 to 25 pin Models 515B 520A _ ct 860 1265 7100 2001 PULSE OXIMETRY ACCESSORIES Model 515B C Inservice Video VHS video tape NTSC format OXYPLETH Model 520A Inservice Video VHS video tape NTSC format Transport Pouch for Models 515 520A 860 1265 7100 2001 Side Accessory Pouch included with monitor Power Cord included with monitor
137. om the monitor 2 Place a screwdriver into the Fuse Access Slot and pry open the Fuse Access Door Line Cord Receptacle Power Switch Voltage Select Indicator Le Fuse Acces Slot Figure 4 Power Entry Fuse Access Door Opening 3 With 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 TRU Fuse Holder Assembly Figure 5 Fuse Removal 4 After replacing the fuse s snap the fuseholder assemblies into the PEM and shut the Fuse Access Door Changing the AC Mains Voltage 10 5 5 1 Turn off the Model 520A 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 40 Model 520A Service Manual 5693 90 01 Assembly Exchanges 3 Using needle nosed pliers pull the Voltage Selector Drum from the PEM Note the orientation of the drum the proper voltage should face out Voltage Selector Drum Figure 6 Power Entry Module Voltage Selector Drum Removal 4 Setthe Voltage Selector Drum s
138. onds of continuous violation of the set limit or immediately Limit values are retained in memory when monitor is turned off or the monitor can be set to use its default settings each time it is turned on General Specifications 16 4 Operating Environment 50 104 F 10 40 0 90 relative humidity non condensing Weight 7 165 5 oz 3 32 kg Dimensions Height 3 3 inches 8 38 cm Width 9 inches 22 86 cm Depth 8 inches 20 32 cm Power 100 120 200 240 V AC 50 60 Hz Fuse Rating U S A 0 5 A 250 V Slo Blo x2 European T 250 mA 250 V x2 Battery Type lead acid gel cell Battery Life 3 hours Note Excessive alerting reduces battery life When 15 minutes of battery life remain the low battery indicator illuminates When the battery becomes exhausted the monitor display shuts down Connect to AC power to recharge battery Recharge Time battery fully recharged in 12 15 hours max Additional Features 16 5 74 model 520A Service Manual 2 Minute Silence When AUDIO key is pressed deactivates audible alerts for two minutes Indicated by illuminated 2 2 Min LED Audio Off Feature user selectable If enabled press and hold AUDIO key for 3 seconds and audible alarms will not activate Indicated by flashing OFF LED Battery Backed Trend Memory Trend memory print of any 30 minutes 2 hours 8 hours 12 hours or 24 hours when used with the Seiko DPU 414 Seiko DPU 411 Hewlett Packard ThinkJet
139. ory and thm proper of Novameatrix Medical Systems inc ond may not bs reproduced used or disclosed in whole or in part without the written consent of Novametrix Medica Systems Inc FAB POWER SUPPLY BOARD 2ND GENERATION 02726 03 SCHEMATIC POWER SUPPLY BOARD SNAP RIVET REF 2726 04 TEST PROCEDURE POWER SUPPLY BOARD YXD5918 10 TRANSFORMER MAINS POWER SUPPLY BOARD T301 REMOVE 2ASB MARKING 272502XX 152029 CAPACITOR 220uF 207 35V ELECTROLYTIC C Yr 152081 CAPACITOR 6800uF 35V 20 ELECTROLYTIC Ci 152096 CAPACITOR 220uF 35V 20 ELECTROLYTIC c2 154072 CAPACITOR tuF 50V 10 X7R CERAMIC CHIP 5 7 154079 CAPACITOR 10uF 25V 10 TANTALUM YZ 180014 INDUCTOR 25uH 25 SPACING Li yt 211213 CONNECTOR 2 PIN POST HEADER 9302 yy 211505 CONNECTOR 5 PIN SQUARE POST HEADER J301 280114 SNAP RIVET 118 158 THK PANEL FOR R15 Yr 470026 RESISTOR 150 OHM 1 4W 107 5 474137 RESISTOR 1M OHM 1 8W 1 474141 RESISTOR 249k OHM 1 8W 17 ADD HOT MELT UNDER 474145 RESISTOR 215 OHM 1 8W 1 R11 L1 COIL 474151 RESISTOR 37 4k OHM 1 BW 1 474162 RESISTOR 61 9k OHM 1 8W 1X R13 474165 RESISTOR 10k OHM 1 8W 1 R10 474166 RESISTOR 100k OHM 1 8W 1 R5 R7 R9 R17 ne DERI IC a wwe we mou 9 me SOLDER SIDE en
140. ouse Oak Road Watchfield Swindon Wilts SN6 STD UK Manufacturing Quality and Safety Novametrix manufacturing facility is certified to ISO 9001 and EN46001 MDD93 42 EEC Annex II Novametrix Medical Systems Inc products bear the CE 0086 mark The product is certified by Underwriter s Laboratories UL to bear the UL mark and tested by TUV Rheinland to IEC601 1 EN60601 1 Model 520A Service Manual C Contents HE Vea CR VE VA iii Brus vii List of Ta Ie viii Lepigore o o ul DT 1 Purposes C 1 Technology Description iro b ieee ae 1 Conventions Used In This 2 Acknowledgments U XU LA 2 Patient Safety J Eu be Kl la Rv Fa EX KC ERE 3 WarhingS uinci RA 4 E 5 Front Panel 6 Rear amp Top Panels 7 Summary of Operation U 8 Trees i xp osa pina adain dansara En Ubi HEMDEN RR 9 Electronic Theory of Operation J J 15 2472 Power Supply Board eto ec ond eda D ua 15 AC Mains and Battery Operation Overview 15
141. ow Diode D9 keeps current from backfeeding into IC14 when the monitor is turned off but still connected to the AC line The 2MIN D3 AUDIO OFF D4 ALERT D5 and LOW BAT D1 LEDs are driven by the 8 bit latch IC13 When each of the corresponding signals is driven high the appropriate LED on the keypanel is illuminated See O Device Controller on page 31 Display Interface 9 3 19 The display is connected to the 2471 Main Board at J107 It is controlled by the processor using the RD Read WR Write and DISPCS Display Chip Select lines Data bits DO D7 are used as input output lines and AO is used in conjunction with the RD and WR lines to distinguish between read and write operations as listed below RD WR ap Low Low 5 Command High Status Read Write Low Data Read Data Write Table 1 Display Command Data table The CNTRST Contrast line is controlled by pressing the front panel key When depressed and held the processor controls the digital to analog converter IC29 line is brought low along with and DACCS the data on DO D7 controls the voltage at IC30 pin 7 which can vary from 0 4 volts The output of IC30 pin 7 along with 4VREF feeds summing amplifier IC30 pins 1 2 3 The output of the summing amplifier IC30 pin 3 controls the base of Q10 which in turn controls the contrast of the display through a variable negative voltage 30 5204 Service Manual 5693 90 01 2471
142. r On Sensor 87xx Signal Attenuation 3 Saturation 92 Connect the TB500B to the Model 520A SpO Input Connector Verify a Pulse Activity Bar appears in the Message Center Verify SpO and Pulse Rate values appear after several pulses Set the Signal Attenuation to 1 Verify the Saturation and Pulse Rate displays blank out an alarm sounds and PROBE OFF PATIENT 15 displayed Set the Signal Attenuation to 3 and verify the displays and Pulse Activity Bar return Set the Saturation to 0 Verify that after a short delay LOW SIGNAL appears in the Message Center Set the Saturation to 100 and verify the displays and Pulse Activity Bar return Press and hold the TB500B RED push button Verify the monitor alarms and displays PROBE FAULTY RD Release the button Press and hold the TB500B INFRARED push button Verify the monitor alarms and displays PROBE FAULTY IR Release the button Verify the displays and Pulse Activity Bar return Press and hold both the TB500B RED and INFRARED push buttons Verify the displays blank out and CONNECT SPO2 PROBE is displayed Release the buttons Verify the displays and Pulse Activity Bar return Disconnect the TB500B from the monitor Set the Sensor Type switch to 86 5 Reconnect the simulator to the monitor Verify the message INSUFFICIENT LIGHT is replaced in approximately 10 seconds by CAN T I D PROBE which is itself replaced later by PROBE FAULTY Disconnect the TB
143. s 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 control which now consists of R12 R13 and R14 setting the voltage to 13 2 volts When more than 600mA of current flows through IC3 pin 1 shorts 2 to ground which shuts off until its next switching cycle when the current reaches a safe level IC3 pin 1 allows to remain on The voltage switched by 01 is also fed to IC2 as VCH Voltage Charge The output of this 5 volt regulator provides the LINEST Line Status signal to the main board at E302 pin 3 With AC applied LINEST is high LINEST goes low when the AC is disconnected The LINEST line is also routed to the power on off circuitry See Power On Off Control Circuitry on page 19 Battery Operation 9 1 3 Without AC power there will be no secondary voltage rectified by D1 Power for the monitor will be supplied from the battery at J302 pins 1 and 2 16 520A Service Manual 5693 90 01 2726 Power Supply Board 5 Jun 01 The battery power will conduct through D3 and F301 to VIN at E302 pin 1 to the 2471 main board The arrangement of R2 and D2 bias Q1 off in this condition which prevents power from reaching IC2 and IC3 The output of ICI is also prot
144. sors Sensor is faulty Remove sensor from use and contact quali fied service personnel CONNECT SP02 PROBE Sensor is disconnected from the monitor Sensor is faulty Remove sensor from use and contact quali fied service personnel t Both sensor LEDs have failed the cable connections are open or shorted PROBE FAULTY Sensor faulty Remove sensor from use and contact qualified service personnel t This error traps intermittant faults such as Probe Red LED or Infrared LED failures caused by frayed or broken wires in the sensor cable Whereas PROBE RED or LR LED FAILED is displayed for as long as the error lasts Faulty Probe is displayed if those errors cease without the user replacing the faulty sensor EVENT MARKED An event was successfully entered into trend memory Model 520A Service Manual 47 Section 11 Troubleshooting Message Center Display INCOMPATIBLE PROBE Possible Explanation A non SuperBright M sensor is connected use only 87xx series sensors Sensor is faulty Remove sensor from use and contact quali fied service personnel INSUF LIGHT Insufficient Light where is time in seconds after 99 sec onds display shows Sensor placed on a site too thick or opaque for adequate light transmission Reposition the sensor A non SuperBright M sensor is connected use only 87xx series sensors LIGHT INTERF Light Interference where is
145. spectively The secondary winding of pins 5 and 6 of T1 are rectified by D3 and filtered by C9 L1 and C20 this voltage designated as VCC 45 volts acts as reference for IC9 supplies power for the opto isolator non isolated side and powers other circuitry on the board The secondary winding consisting of pins 2 and 3 are rectified and filtered by D1 and Cl The rectified voltage at this point is approximately 7 volts DC and is regulated to 5 volts by IC2 This isolated supply powers the isolated portion of the opto isolators and the RS232 driver chip The unregulated voltage VRAWI is sent to the rear panel connector J101 The backup voltage VBACK is regulated by ICI2 from the VIN supply Capacitors C22 and C27 serve as filters and D17 allows VCC to power VBACK circuitry when the monitor is on At this point D18 is biased off so IC12 is idle When the monitor is turned off and VCC collapses D18 is then forward biased and IC12 now supplies VBACK circuitry D17 at this time is reverse biased and prevents power from reaching VCC The saturation sensor LEDs derive their power LEDSRC from the current regulator IC32 See sheet 3 on 2471 schematic page 2 on 2775 schematic Resistor R31 limits the maximum current draw to 45 mA nominal draw 35 mA Regulator output is filtered by C85 and L2 The charge stored on capacitor supplies the 290 350 mA peak currents that can occur when the sensor LEDs are turned on Diode D12 prevents the regul
146. ster 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 to the system It also sets the Reset Input RESIN signal at IC18 pin 9 high which causes RESET at IC18 pin 19 to activate low The active RESET line causes the microprocessor IC16 pin 7 and the display module to be reset The monitor then performs its powerup self test routines and if the glitch has been cleared the monitor resumes normal operation If the problem still exists a self test or other error should be displayed Serial I O Controller 9 3 22 Digital data from the three Analog To Digital Convertors is read by the CPU through its clocked serial data input RXS at IC16 pin 52 The PEEL IC18 acts as the Clocked Serial I O CSI O Controller Except during powerup or Watchdog Timer reset C39 pin 3 provides an interrupt to the CSI O controller in the form of a 5 millisecond period square wave input to IC18 pin 7 5 5 On the rising edge of INT5MS a CPU interrupt request is generated when IC18 pin 18 CPUINIT goes low The CPU responds by sending the clock input to CSI O controller CKS at IC18 pin 6 low This CKS line is inactive high unless a serial receive operation is in progress The CPU also sets up the ADC decode lines AAT and at 1 18 pins 5 and 4 and as a result one of the ADC chip select lines CSADCI CSADC2 CSADC3 is brought low and the CPUINIT li
147. t Packard ThinkJet Printer and the Novametrix Model 315 Printer The CPU signal crosses the isolation barrier at 4 The 0 5 volt opto isolator output at IC4 pin 5 is used to bring data to the Optional 9622 01 Analog Module The IC4 pin 5 output is also brought to pin 10 The level shifted output at ICI pin 7 is unused except for factory test use The Receive RX line at J101 pin 2 and the Clear To Send CTS line at J101 pin 6 are input signals to the Model 520A They are level shifted and sent across the isolation barrier by ICs5 and 6 respectively Model 520A Service Manual 33 Section 9 Electronic Theory of Operation The transmit signal is dedicated to communication with the Optional Analog Module Catalog Number 9622 01 which when connected to the rear panel connector provides analog representations of the SpO and Pulse Rate values plethysmogram signal and a pass through port for the RS232 connector The transmit output from the CPU and the Receive and Clear To Send CTS inputs to the CPU are connected to the rear panel RS232 connector 34 520A Service Manual 5693 90 01 1 Maintenance General 10 1 This section presents recommended maintenance schedules for the Model 520A and information on general maintenance such as battery and fuse replacement disassembly and assembly instructions and system software updates Maintenance Schedules 10 2 The
148. t into a Wait state until IC27 finishes its task then Ready returns high and the processor continues its operations The AUDOUT output at IC27 pin 7 drives the audio amplifier IC26 The amplifier output is coupled through capacitors C55 and brought to J109 as the SNDOUT Sound Out line The speaker which is mounted in the chassis is connected to J109 LS1 is not installed on the 2471 Main Board Model 520A Service Manual 29 Section 9 Electronic Theory of Operation Keypanel Interface 9 3 18 12 keys switches the Model 520A front panel are connected to the 2471 Main Board through a ribbon cable at J104 Each key except POWER is connected to an 8 bit latch either IC14 or 5 When any of these keys is pressed the corresponding latch input is brought low The processor continually reads the status of these latch outputs the RDKEY enables 4 when low and the RDKEY 2 line enables IC15 when brought low The POWER key ON OFF signal is sent through J104 pin 15 The AC Line Status signal LINEST is generated by the power supply and is high 5 volts when the monitor is connected to the AC Line Mains and the rear panel switch is set to I This 5 volt level is sent to LED D2 the green indicator on the keypanel via J104 pin 16 The LINEST signal is also input to the latch at IC14 pin 8 so that the CPU can detect if the unit is operating on AC line power 1 14 pin 8 high or on battery power 1 14 pin 8 l
149. t jack to the saturation input connector 14 38 monitor test 1 Press the Test softkey Automatic Test will appear Press the Test softkey again to initiate the test follow the prompts in each test and verify each test passes Note A series of auto tests will be performed if any failures are encoun tered the monitor will default to MONITOR TEST 2 Of the list below only the tests with next to them are performed in the auto test Upon completion of the auto test the monitor will default to MONITOR TEST 2 The following is a list of the monitor tests available Test Description 1 Auto Test 2 3 ROM Test 4 Real Time Clock Test a 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 12 Display Channels Test 13 515 gt PC Interface Test 14 3 9 Disconnect the jumper wire the RS232 test fixture and the saturation test jack 14 3 10 Connect the TB500B to the saturation input connector Set the saturation to 0 and the attenuation to 5 5 Jun 01 Model 520A Service Manual 61 Section 14 Calibration Tests 14 3 11 14 3 12 14 8 13 14 3 14 14 8 15 14 8 16 14 3 17 14 8 18 14 8 19 62 Model 520A Service Manual Using the Next softkey increment to monitor test 12 Display ADC channels Press the Test softkey Display ADC channels will appear Press the Test softkey to initiat
150. te can be affected by many factors and may occasionally be frozen Do NOT attach an SpO 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 Do NOT apply Y Sensor tapes or wraps so tightly that the circulation is restricted Inspect site often for adequate circulation at least once every four hours 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 more frequent site checks may be appropriate 5693 90 01 5 Jun 01 4 Cautions CAUTION Indicates a condition that may lead to equipment damage or malfunction Do not operate OXYPLETH when it is wet due to spills or condensation Do not operate OXYPLETH 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 Tension should not be applied to the sensor cable Overstretching the pulse oximeter finger sensor can damage the sensor and potentially affect pulse oximeter readings Do not stretch the finger sensor open beyond the limit for which it was designed Overstretching can be prevented avoid opening the sensor by any means other than squeezing the grips Do NOT force the sensor onto
151. the time in seconds after 99 seconds display shows ambient light sources sunlight warming lights etc are interfering with sensor light sources Shield the sensor from ambient light sources LOW SIGNAL Low Signal Strength where is the time in seconds after 99 seconds display shows that the pulse strength as detected by sensor is too weak for proper monitor operation Reposition sensor MONITOR ERROR Monitor faulty Record error message appearing on bottom line of display and contact qualified service personnel t RAM SELF TEST FAILED Ram failed the power up self test ROM SELF TEST FAILED Calculated EPROM checksum not does not equal stored value Bad EPROM t BAD STACK POINTER Stack pointer base not at top of stack t CORRUPT SYSTEM The CPU MMU point ing to an illegal address map Digital Bd fault t STACK OVERFLOW Stack pointer exceeded allo cated stack size t DISP BUFFER OVERFLOW Display buffer queue exceeded its allocated size tr HARDWARE ERROR 1 1 Main Bd PEEL is defec tive 2 Main Bd 20 bit ADCs exceeded acceptable cali bration thresholds XXms INT TIMEOUT where XX is 10 or 25 The interrupt has interrupted itself t ERROR UNDEFINED Failed in an unknown state MONITOR PERFORMING SELF TEST Monitor is performing its power up system diagnostic tests Parameters Reset To Factor
152. they are functionally operational If the monitor is to be returned to clinical use be sure to let the user know that the monitor is now using its default settings as these may differ from the user s mal settings Special Power Up Functions 12 3 Each of the Model 520A front panel pushbutton keys is linked to a special hidden power up function To initiate the special function start with the monitor off and press a front panel key While still holding that key press the 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 soft ware revision level is displayed in the message center for as long as the AUDIO is pressed Release the key and the monitor continues with its nor mal power up sequence ALERT RESET Return to factory default settings Turn the monitor on while holding the ALERT RESET key and the monitor resets all its control settings including alert limits averaging times etc to the factory default values A Parameters Reset To Factory De fault message is briefly displayed and the monitor continues with its Model 520A Service Manual 53 Section 12 Functional Test 54 520A Service Manual normal power up sequence Note that the system date and time are not af fected by this action PULSE OXIMETER OX YPLETH NOvAMETAIX Softkey 1 Softkey 2 Figure 12 Softkey Identification Softkey 1 E
153. time stamp collected printed trend data See sheet 4 on 2471 schematic sheet 3 on 2775 schematic The 32 768 kHz crystal Y3 provides the timing signals for the clock chip IC24 which is powered from the VBACK supply so that the clock can continue to keep time when the monitor is turned off provided the monitor s 12 volt internal battery is connected and maintains at least a nominal charge The RTC is activated when its Chip Select line CS0 at IC24 pin 2 is brought low With the monitor on PWRON will be low 1 25 pin 13 the RTC line will be brought low by the processor through IC22 pin 14 these lines drive RTCCS Real Time Clock Chip Select IC25 pin 11 low If at this time the RD IC24 pin 8 input is low a RTC Read occurs whereas a RTC Write will occur if the WR IC24 pin 10 input is low Addressing is handled by A0 A3 pins 4 7 and data I O through DO D3 pins 14 11 Sound generator 9 3 17 The programmable tone controller IC27 is replaced with the Tone Generator Replacement board 2755 01 this 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 by the processor when IC22 pin12 is brought low While is low WR is brought low and data bus information including frequency pitch and attenuation volume is accepted by the tone generator The Ready signal IC27 pin 4 goes low while accepting data and the processor is pu
154. to the Main Menu 13 2 15 This completes the Monitor Accuracy Test If the monitor does not meet the above listed specifications refer to Section 14 Calibration Tests on page 59 or contact the Novametrix Service Department for recalibration repair or replacement information 5 Jun 01 Model 520A Service Manual 57 Section 13 Accuracy Test This page intentionally blank 58 Model 520A Service Manual 5693 90 01 5 Jun 01 1 4 Calibration Tests Introduction 14 1 The Calibration Tests verify the calibration and operation of the electronic circuits within the Model 520A Pulse Oximeter These tests do NOT need to be performed on a regular preventative maintenance basis Perform these tests only if the monitor fails to operate as expected and or fails the Functional Test on page 51 and or the Accuracy Test on page 55 Calibration Tests should be performed only by qualified service personnel The Model 520A contains static sensitive devices Follow proper grounding procedures when handling the internal components to avoid damage from static discharge The test requires the use of the Model TB500B Sensor Simulator Test Box 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 If the monitor does not pass the Calibration Tests remove it from use and contact the Novametrix Service Department for repair replacement assistance
155. trix 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 Facsimile 203 284 0753 World Wide Web http www novame trix com Internet techline 9 novametrix com Caution Federal U S A law restricts this device to sale distribution or use by or on the order of a licensed medical practitioner CopyrightO 1992 2001 Novametrix Medical Systems Inc This document contains information which is proprietary and the property of Novametrix Medical Systems Inc and may not be reproduced stored in a retrieval system translated transcribed or transmitted in any form or by any means without prior explicit written permission from Novametrix Medical Systems Inc Novametrix and OXYPLETH are a registered trademarks SuperBright is a trademark of Novametrix Medical Systems Inc The OXYPLETH monitor and its sensors and accessories are covered by the following US patents 5 190 038 5 398 680 5 448 991 5 820 550 5 999 834 5 891 026 6 073 038 6 149 481 Other patents pending 5693 90 01 5 Jun 01 Revision History August 31 1992 Release 00 This manual replaces all preliminary versions Based on Revision 2 0 CPU software June 5 2001 Revision 01 R N905 Declaration of Conformity with European Union Directives The authorized representative for Novametrix Equipment is European Compliance Services Limited Oakdene H
156. uesday October 05 1999 of 1 Schematic Tone Generator Replacement Board Drawn This document contains informotion which is prietary and the property of Novometrix Medical Systems Inc and may not be reproduced used or disclosed in whole or in part without the written consent of Novametrix Medical Systems Inc 4 SEE DETAIL A LOCATE CLOSE TO ITEM 16 5 3 4 5 2 YEL 26AWG 5 PE 26AWG 5 BLU 26AWG 5 522 OVERALL WIRING DIAGRAM TWIST BLACK amp BROWN WIRES 6 TURNS CLOCKWISE COVER PINS WITH HEAT SHRINK AND SHRINK IN PLACE FOR WIRE PREPARATION 6 WIRES SEE DETAIL P108 NOT SHRINK LOCATE CLOSE TO P108 2 1 4 1 8 STRIP amp TIN 7 N GO PIN 1 INDICATOR 3 8 DO NOT SHRINK AT THIS TIME 108 SEE NOTE DETAIL B NOTES N BEFORE ASSEMBLING ITEMS 1 amp 4 APPLY 1 DROP OF ITEM 2 TO DRESS BEZEL IN AREA B AS SHOWN IN DETAIL A AND TO AREA D IN REAR VIEW C C FINGER TIGHTEN NUT ONTO CONNECTOR UNTIL IT BOTTOMS OUT AGAINST ITEM 1 ALLOW ASSY TO CURE FOR 24 HOURS 2 WIRE WILL BE PREPPED WHEN CONTACT ITEM 6 IS INSTALLED FOR REFERENCE ONLY 1 8 STRIP DO NOT TIN 3 FOR EPOXY MIXING ASSY PROCEDURE SEE 9779 33 DO NOT SCALE TITLE UNLESS OTHERWISE SPECIFIED CABLE ASSY SaO2 INPUT MODEL 520 4 18 08 DIMENSIONS ARE IN INC
157. uitry 9 3 1 The Model 520A power on off control circuitry consists of the VBACK supply regulated by IC12 IC10 IC11 and the POWER key See page 4 2471 schematic page 4 on 2775 schematic When the battery or AC Mains is first applied to the power supply board via VIN J102 pin 1 VBACK goes to 5 volts provides power to IC10 and and through the C26 and RP4 pins 3 4 network at IC10 pin 8 sets IC10 pin 2 to a logic Low The ON OFF line is brought Low each time the front panel POWER key is pressed This sends the output at IC11 pin10 High This Low to High transition clocks the 1 D flip flop portion of IC10 The Q1 output at IC10 pin 2 goes High and with each successive press of the POWER key this output toggles to the opposite level Low or High A High turns the Model 520A on and a Low shuts it off While the Q1 output at IC10 pin 2 is High the MOSFET Q7 is turned on and pulls the gate of MOSFET 08 to ground thus causing Q8 to conduct as well With Q8 conducting the currently active monitor power source either the AC Mains derived supply or the battery supply will flow through Q8 to the voltage input pin 7 of the Pulse Width Modulator IC9 The output 9 pin 6 will oscillate at the frequency set by R13 and C15 This causes Q5 to switch on and off and provide a path to ground through the primary coils of T1 for the supply Mains or battery at T1 pin 12 Current flowing in the primary is measured at IC9 pin 3 and
158. waveforms in Figure 3 with the exception of CLK are only valid when both the SC1 and SC2 inputs are low The System Calibration inputs SC1 and SC2 generated by the microprocessor are kept low except that they are toggled high 22 Model 520A Service Manual 5693 90 01 2471 amp 2775 Main Board 5 Jun 01 low during a Probe Off Patient alert and during a system power up self test See Calibrating the 20 Bit Analog to Digital Convertors on page 25 204 78 CLKIN ROED L RSMP ae ISMP Eu aep 20us io 1 GE 4015 s sv 625us m Figure 3 Figure 1 Front End Timing The data sampling sequence consists of turn on the Red LED RDLED and the Analog Sample line ASAMP c sample the Red LED return signal RDSMP e turn on the Infrared LED IRLED and the Analog Sample line ASAMP f sample the Infrared LED return signal ISMP h turn off the Infrared LED the Analog Sample line and stop sampling 1 repeat the process starting at step a The Analog Sample ASAMP line is used to nullify the effects of any ambient light signals returning from the sensor See Sensor Photodiode Return Path on page 24 The IC42 INSIG and SIGND outputs are used in conjunction with the SC1 and SC2 inputs See Calibrating the 20 Bit A
159. y Default Displayed when monitor is turned on while pressing the ALERT RESET key Monitor now using factory default settings 48 Model 520A Service Manual 5693 90 01 5 Jun 01 Message Center Display PROBE FAULTY RD Possible Explanation Sensor faulty Remove sensor from use and contact qualified service personnel t Sensor Red LED has failed or the cable connections are open or shorted PROBE FAULTY IR Sensor faulty Remove sensor from use and contact qualified service personnel t Sensor Red LED has failed or the cable connections are open or shorted PROBE OFF PATIENT Sensor disconnected from patient improperly applied or placed on an area too translucent for proper sensor operation Reposition sensor PULSE HIGH Selected pulse rate high alert limit has been violated PULSE LOW Selected pulse rate low alert limit has been violated PULSE OUT OF RANGE Pulse rate is less than 30 bpm or is greater than 250 bpm Revision 2 0 Monitor software revision level Displayed when monitor is APR 28 92 turned on while pressing AUDIO key SpO2 HIGH Selected saturation high alert limit has been violated SpO2 LOW Selected saturation low alert limit has been violated Model 520A Service Manual 49 Section 11 Troubleshooting This page intentionally blank 50 Model 520A Service Manual 5693 90 01 5 Jun 01 1 2 Functional Test Introduction 12

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