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MAC® 5500 Resting ECG Analysis System

1. en supplied accessories that do not affect EMC compliance are not included Part Number Description Maximum Lengths 900770 001 MAC Pac Battery NA 900995 001 Cam 14 NA 2016560 001 Cable Assembly Host Mac 5500 1 7m 2016560 003 Cable Assembly Host Mac 5500ST 5 4m 901142 001 Kit Cam 14 Resting W AHA Adaptors NA 901142 002 Kit Cam 14 Resting W IEC Adaptors NA 400073 001 Serial Comm Cable 8 Pin Mini DIN 6 1m 416070 001 External Video Cable 1 8m 700520 002 Analog TTL Interface Cable 3 0m 2007918 001 Treadmill Cable Mac 5500ST to T2000 6 0m 405535 006 Power Supply Cord US 13A 125V 3 0m 401855 001 Power Supply Cord European 10A 250V 2 5m 401855 002 Power Supply Cord British 10A 250V 2 5m 401855 003 Power Supply Cord Italian 10A 250V 2 5m 401855 004 Power Supply Cord Israeli 10A 250V 2 5m 401855 007 Power Supply Cord Swiss 10A 250V 2 5m 401855 008 Power Supply Cord Indian 10A 250V 2 5m 401855 010 Power Supply Cord Australian 10A 250V 2 5m 2005264 XXX MAC 5500 External Modem Kit NA 2018626 XXX MAC 5500 Barcode Scanner Kit NA 2018627 XXX MAC 5500 Magnetic Card Reader Kit NA 2014403 XXX Mac 5500 Wireless Kit NA 2023922 XXX Mac 5500 Secure Wireless Kit NA Revision A MAC 5500 resting ECG analysis system 2020299 020 C 7 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC For your notes C 8 MAC 5500 resting ECG analysis system Revision A 2020299 020
2. Device Configuration Requirements Refer to ergometer Operator s Manual MAC 5500 Configuration Requirements Use the Edit Protocol application to set the protocol Test Type to Ergometer in Watts or Ergometer in KPM for protocols that will be used with this ergometer Configure pin 2 on the ANA TTL port by selecting the following System Setup Exercise Test Inputs Outputs and Slow Analog Output to Workload or Configure pin 8 by selecting System Setup gt Exercise Test gt Inputs Outputs gt Fast Analog Output to Workload 999 Revision A MAC 5500 resting ECG analysis system 3 17 2020299 020 Installation MAC 5500 ST Requirements and Configuration For your notes 3 18 MAC 5500 resting ECG analysis system 2020299 020 Revision A d Maintenance Revision A MAC 5500 resting ECG analysis system 2020299 020 4 1 For your notes 4 2 MAC 5500 resting ECG analysis system 2020299 020 Revision A Maintenance Introduction Introduction Recommended Maintenance Regular maintenance irrespective of usage is essential to ensure that the equipment will always be functional when required WARNING Failure on the part of all responsible individuals hospitals or institutions employing the use of this device to implement the recommended maintenance schedule may cause equipment failure and possible health hazards The manufacturer does not in any manner a
3. 1 kV differential mode 1 kV differential mode Mains power should be that of a typical EN 61000 4 5 2 kV common mode 2 kV common mode commercial or hospital environment Voltage dips short interruptions and voltage variations on power supply input lines EN 61000 4 11 lt 5 Ut 59596 dip in Uy for 0 5 cycles 40 Ut 60 dip in U for 5 cycles 70 Ut 30 dip in Uy for 25 cycles lt 5 Ut 59596 dip in Up for 5 sec lt 5 Ut gt 95 dip in Uy for 0 5 cycles 40 Ut 60 dip in Uy for 5 cycles 70 Ut 30 dip in Uy for 25 cycles lt 5 Ut gt 95 dip in Uy for 5 sec Mains power should be that of a typical commercial or hospital environment If the user of the MAC 5500 requires continued operation during power mains interruptions itis recommended that the MAC 5500 be powered from an uninterruptible power supply or a battery Power frequency Power frequency magnetic fields should be 50 60 Hz magnetic 3 A m 3 A m at levels characteristics of a typical location field in a typical commercial or hospital EN 61000 4 8 environment NOTE Ut is the AC mains voltage prior to application of the test level C 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC Guidance and Manufacturer s Declaration Electromagnetic Immunity The MAC 5500 is intended for use in the elec
4. Battery Disch rge Trail 5 13 Battery Charge Tesista asa ais eicit pec hne 5 14 Print Charge Discharge Test Results sss 5 14 COMMUNICATION Tests Sriati cick rr erase ba ih epe a 5 14 COM Port Loopback Test 0 0 ieee ene 5 14 Extemal Modem Testi rrr ripiene riy need ren A 5 15 Internal Modem Test 5 15 Ethernet Module Test ccc cece ect e tect ne 5 15 Acquisition Module Test 00 cc ccc eee e 5 15 Analogi hO Testr riea a ette tesa da OUR a tt 5 15 Analog Output Test iere Het ma Hee dd 5 15 Analoginput Tests 32 355 aiii cad 5 16 DCOut Loopback Test cc ds I n dede b 5 16 ECGOut QRSTrigger Loopback Test sss 5 16 Floppy Drive Testi ia rit Fer eth d o ke Fed deed bec 5 16 Internal Memory TASES 1 5 2 retten Aan reete pate ete e Sey 5 17 SD Card Tests a ce beet ef c ae t rat E AO Dno ehe n 5 17 Equipment Problems cccecceeceeeeecccceuaeeaeeaneaeeereareauegs 5 18 ECG Data NOISE aria aria tdt Mi ig ae RA 5 18 Missing ACI TIP Report i i 5 18 No BP from External Device 01 cece ccc ccc cece nents te een eenes 5 18 Treadmill Ergometer Does Not Move cece cect eee nent nes 5 18 System ErrorS isse eese aan aaa a ra ns 5 19 Frequently Asked Questions nen n nnns 5 20 Maintenance 135a use teo da terc Calcite tb erac dote oan bh ari dpa nA 5 20 Save S etUpsz zs iom a siete deep ct cA Hin ee P a eh 5 20 Stoning ECGS eto ei e EORR Het 5 20 FormatamSD Card iso rok e Cree neret Foe RC EORR 5 20
5. Ground mm c Ground Keyboard J 8 Pin No Signal NC NC NC NC NC Sense4 wo CO y DD HT A w N Ra Sense2 Sensel Sense0 Revision A MAC 5500 resting ECG analysis system 2020299 020 5 27 Troubleshooting CPU PCB Input Output Signals Keyboard J 8 Continued 10 Sense3 11 Sense5 12 Sense6 13 Sense7 14 Drive0 15 Drivel 16 Drive2 17 Drive3 18 Drive4 19 Ground 20 Power Key 21 Drive5 22 Drive6 23 Drive 24 Drive8 25 Drive9 26 Drivel0 LCD J 10 Pin No Signal 1 Ground 2 Pixel Clock 3 Hsync 4 Vsync 5 Ground 6 RO LSB 7 R1 8 R2 9 R3 10 R4 11 R5 MSB 12 Ground 13 G0 LSB 14 G1 15 G2 16 G3 5 28 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting CPU PCB Input Output Signals LCD J 10 Continued 17 G4 18 G5 MSB 19 Ground 20 BO LSB 21 B1 22 B2 23 B3 24 B4 25 B5 MSB 26 Ground 27 Data Enable 28 3V Power 29 3V Power 30 NC 31 NC Power Supply Motor J 11 Pin No Signal 1 Motor Encoder B 2 5V Power 3 Motor A 4 Motor Encoder A 5 Ground 6 Motor B 7 NC 8 28V Power 9 Ground 10 Battery Charge LED 11 28V Power 12
6. sss nnne 6 4 Appendix A Abbreviations ooo Standard Abbreviations ccccccceeccccceeeeccceeeecueneeecunnereganees A 3 Appendix B Technical Specifications B 1 Technical Specifications seresa seinri nen e een nnne B 3 Display icono iiie sient acta de EA TR t ee odo e d aeter ede ee e Bs B 3 Computerized Electrocardiograph 0 0 0 ccc eect cette B 3 Wi oi tested Reels B 4 Keyboard oec as a tias B 4 Tous Eq T Tc B 4 Vectorcardiography dis a esce ina cia bau wala Vela bao B 4 Hi Res and PHi Res Signal Averaged Electrocardiography B 5 A O AS B 5 Environmental asia ta dot B 5 aaa ebd ph dae atlas rico B 7 Appendix C Electromagnetic Compatibility C 1 Electromagnetic Compatibility EMC sssenn nn n n nnn C 3 Guidance and Manufacturer s Declaration Electromagnetic Emissions C 3 Guidance and Manufacturer s Declaration Electromagnetic Immunity C4 Recommended Separation Distances 0 0 cece cece cette eee eee C 6 Compliant Cables and Accessories e C 7 Index cria e oa er e mx e x INDEX MAC 5500 resting ECG analysis system Revision A 2020299 020 l Introduction Revision A MAC 5500 resting ECG analysis system 2020299 020 1 1 For your notes 1 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Introduction Manual Information Manual Information Revision History Each page of the document has the do
7. Continued Item Part Number Power Cord CONT Euro 10A 250V 8FT 401855 001 Power Cord British 10A 250V 8FT 401855 002 Power Cord Italian 10A 250V 8FT 401855 003 Power Cord Israeli 10A 250V 8FT 401855 004 Wire Harness 10A 125V 6 5FT 401855 005 Wire Harness 10A 250V 6 5FT 401855 006 Power Cord Swiss 10A 250V 8FT 401855 007 Power Cord Indian 10A 250V 8FT 401855 008 Danish 220VAC 50HZ STRESS 401855 009 Power Cord Australian 10A 250V 8FT 401855 010 Power Cord 10A 8FT CONT Euro Stress 401855 101 Power Cord 10A 8FT British Stress 401855 102 Power Cord Italian 10A 8FT Stress 401855 103 Power Cord Israeli 10A 8FT Stress 401855 104 Power Cord Swiss 10A 8FT Stress 401855 107 Power Cord Indian 10A 8FT Stress 401855 108 Wire Harness 10A 125V 6 5FT 401855 005 Wire Harness 10A 250V 6 5FT 401855 006 Power Cord Swiss 10A 250V 8FT 401855 007 Power Cord Indian 10A 250V 8FT 401855 008 Danish 220VAC 50HZ Stress 401855 009 Power Cord Australian 10A 250V 8FT 401855 010 Power Cord 10A 8FT Cont Euro Stress 401855 101 Power Cord Danish 10A 8FT Stress 401855 109 Power Cord AUST 10A 8FT Stress 401855 110 Power Cord 16A Euro 401855 201 Power Cord 13A British 401855 202 Power Cord 16A Italian 401855 203 Power Cord 16A Israeli 401855 204 Power Cord 15A AUST 401855 210 Cord Power Stress 125V 15A 12FT 405535 002 6 6 MAC 5500 resting ECG analysis system Revision
8. Index Revision A MAC 5500 resting ECG analysis system Index 1 2020299 020 Index 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Index A abbreviations A 3 ACI TIPI report missing 5 18 acquisition module test 5 15 amber battery light 2 4 analog input test 5 16 analog output test 5 15 B back panel connectors 2 5 battery capacity 5 21 battery disposal B 6 cleaning thermal printhead 4 5 visual inspection 4 4 COM port loopback test 5 14 connector back panel 2 4 connectors back panel 2 5 D DCOut loopback test 5 16 display screen 2 3 E ECG data noise 5 18 ECGOut QRStrigger loopback test 5 16 electromagnetic compatibility C 1 equipment storage conditions B 6 Ethernet link 2 3 modem test 5 15 0 operating conditions B 5 pace detection B 3 paper B 4 passwords 5 22 patient data 5 23 patient questions 5 21 product code 1 10 screen 2 3 Secure data card formatting 5 20 Secure data card slot 2 4 serial number 1 9 storage conditions B 6 storage of ECGs 5 20 symbols on equipment 1 7 system setup 5 20 5 21 T test acquisition module 5 15 analog input 5 16 analog output 5 15 COM port loopback 5 14 DCOut loopback 5 16 ECGOut QRStrigger loopback 5 16 modem 5 15 theory of operation 2 7 thermal printhead F a cleaning 4 5 field replaceable units 6 4 ae format a Disk 5 20 transmission of ECGs 5 23 G V green AC power light 2 4 vectorcardiography B 4 H Ww wheel re
9. Unit j o under I Neutral test o UUT Gnd l Rvs L i Gnd I ge 1K AMS moy I Meter I T Patient cable v Connectors A _ _ z AN YN I I EEN Patient cable connectors 52A 4 28 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Domestic Electrical Safety Tests Ground Continuity This test verifies that there is continuity less than 200 mQ resistance between all the exposed metal surfaces which have the potential to become energized and the ground prong on the mains AC power cord If the metal surfaces are anodized or painted scrape off a small area in an inconspicuous area for the probe to make contact with the metal Use a digital multimeter to check ground continuity from the AC line cord ground pin to exposed metal surfaces i e rear panel ground lug ANA TTL and EXT VID Ifthe measurements are significantly out of range check for breaks in the power cord or in the internal connections within the unit Revision A MAC 5500 resting ECG analysis system 4 29 2020299 020 Maintenance Domestic Electrical Safety Tests For your notes 4 30 MAC 5500 resting ECG analysis system Revision A 2020299 020 D Troubleshooting Revision A MAC 5500 resting ECG analysis system 2020299 020 5 1 For your notes 5 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Assembly Descriptions Assembly Descriptions I
10. draw from the printer motor or external loads on the COM ports esp KISS pump The acquisition module s power requirements are modest so efficiency is not a pressing concern and the lower efficiency of this approach is acceptable 1 8V The Atmel CPU and FPGA Xilinx Spartan 2 operates their internal core logic at 1 8V while their I O ring runs at the system standard 3 3V The 1 8 Volt regulator a low dropout linear regulator drops 3V M to 1 8V for use as a core supply 12V The paper motor drive circuit LCD backlight and external COM ports all require 12V The Main Regulator s 18V output cannot provide sufficient current for all of the systems 12V loads so a secondary 12V regulator is required The Main 12V Regulator U15 a switching buck regulator provides the higher currents needed by these loads A P channel MOSFET Q1 switch precedes the regulator to provide on off control Gate capacitor C12 slows the turn on off time of the MOSFET switch to eliminate switching transients The voltage divider created by R135 134 prevents the full supply rail from being impressed across Q1 s gate when on This protection is necessary as the maximum Vgs of the MOSFET is less than the peak supply voltage REF2V5 The high power rails are neither precise nor quiet enough to be used as the reference for analog input output or internal measurement circuits The Analog Reference Regulator U48 a 2 5V shunt regulator provides a quiet an
11. mentioned COM ports an additional com port COM5 is provided by ATMEL This is terminated to daughter board interface connector and is used by the communication board Ethernet module RS 232 level shifting is provided by two transceivers Each produces the necessary drive voltages with internal charge pumps The devices are rated to withstand ESD onslaught so no external ESD protection is provided The transceivers may be shut down under software control to conserve power Clock Calendar The Super I O device provides a clock calendar function Backup battery power is provided by a super capacitor C21 with sufficient storage capacity to power the clock for hours after main battery removal This backup source provides sufficient time to exchange battery packs when 2 30 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation PS2 Keyboard Port The Three Stooges Startup Self Identification necessary Diode CR106 charges C21 when the main system power is up R181 limits the charging current to a safe level External card bar code readers may be connected to the MAC 5500 via a PS 2 compatible keyboard port A small amount of 5V power is available at the connector to power the external device Power faults are detectable EMI and ESD protection are provided System management and some low level I O functions are implemented in preprogrammed 68HC05 microcontrollers Moving so
12. such as changes in paper drive gearing or battery pack capacity Similar in function to the ABus keyboard controller in Max 1 architecture machines Shemp scans the keyboard and queues key presses for the ATMEL CPU Unlike previous designs key presses are reported both on press and release allowing system software to implement auto repeat as well as the continuous operation of treadmill control keys up down faster slower A special key code indicates when all keys are up as a safeguard against stuck keys in the application software Unlike previous keyboard encoder designs Shemp does not provide dedicated scan hardware for the shift and or option keys These keys are now located in the scan matrix Careful placement of keys in the scan matrix allows simultaneous depression of the shift option and other keys without interference Larry controls the paper drive motor and digitizes the analog inputs The motor control functions are virtually identical to those offered by the 78310 processor in Max 1 architecture machines with an expanded speed control range down to zero Since Larry s code is not field alterable every motor control parameter is alterable via BBus Hopefully this renders the code immune to minor changes in the printer drive train Motor Speed Control Larry controls the motor speed by delivering a DAC controlled drive voltage to the motor windings The 6 bit DAC is implemented using discrete binary weighted resisto
13. the upper five bits of the byte are routed to the static byte lane the lower three bits are set to zero and the dynamic byte lane is disabled When the CPU reads a static pixel both the static and dynamic byte lanes are accessed but only the upper five bits of the static byte lane are passed on to the CPU the lower three bits are zeroed Access to the dynamic plane proceed in much the same manner with the appropriate bits being routed to the dynamic byte lane while the static byte lane is disabled Because each 16 bit word of SDRAM contains one pixel and each 16 bit access of the CPU into the frame buffer contains two the LCD controller must pack unpack pixels on the fly During writes if the CPU signals a single byte write the LCD controller writes the byte onto the proper lane as determined by A19 of one memory word If the CPU signals a two byte write the LCD controller queues a two cycle burst write into two consecutive words of SDRAM On reads the LCD controller always reads MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation two pixels from memory and packs them into a single word for access by the CPU which may use both pixels or ignore one By design SDRAMs are faster when data can be moved in sequential bursts The Atmel ARM CPU asynchronous bus interface does not support burst accesses so the opportunity to burst is limited The LCD controller does take advant
14. 2 Press the connector release tabs and pull the connector loose 3 Pull the cable from the retaining tabs 374 4 Reassemble the cable by reversing the above steps 4 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines Disassembly Guidelines Preliminary Steps Prior to disassembly perform the following m f possible process any ECGs remaining in storage m If possible print out set up for future reference m Disconnect the unit from the AC wall outlet and remove the power cord from the unit Remove the battery Remove the chart paper Take strict precautions against electrostatic discharge damage Trolley Disassembly 1 Lock the wheels remove the rear trolley panel then loosen the three captive screws located under the trolley MAC 5000 21A 2 Pull the MAC 5500 up and up toward you 20A 3 Lift the unit from the trolley Revision A MAC 5500 resting ECG analysis system 4 7 2020299 020 Maintenance Disassembly Guidelines Type S Trolley Disassembly To dismount the MAC 5500 from the Type S trolley follow the steps shown in the illustration below 39A Power Supply NOTE A 10 TORX driver is required for disassembly and assembly of the power supply Removal 1 Turn the unit over so the bottom side is up 2 Using a 10 TORX driver remove the three screws holding the power supply in place 3 Lift the power supply to
15. A 2020299 020 Parts List Field Replaceable Units Field Replaceable Units Continued Item Part Number Cord Power RA 125V 13A 10FT 405535 006 Cord Power 18 3 SJT 5509 001 Power Cord RA 125V 13A 12FT 405535 001 Power Adapter 230VAC DC ME 414582 222 Power Adapter 240VAC DC AA 414582 224 Power Adapter 240VAC DC UK 414582 225 Power Cord European Adapter 1FT 415359 001 Power Adapter 100VAC DC J apanese 414582 223 Barcode Scanner Kit English 2018626 001 Barcode Scanner Kit German 2018626 002 Barcode Scanner Kit French 2018626 003 Barcode Scanner Kit Spanish 2018626 004 Barcode Scanner Kit Swedish 2018626 005 Barcode Scanner Kit Italian 2018626 006 Barcode Scanner Kit Norwegian 2018626 009 Barcode Scanner Kit Danish 2018626 010 Barcode Scanner Kit Czech 2018626 011 Barcode Scanner Kit Hungarian 2018626 014 Barcode Scanner Kit Polish 2018626 015 Magnetic Card Reader Kit English 2018627 001 Magnetic Card Reader Kit German 2018627 002 Magnetic Card Reader Kit French 2018627 003 Magnetic Card Reader Kit Spanish 2018627 004 Magnetic Card Reader Kit Swedish 2018627 005 Magnetic Card Reader Kit Italian 2018627 006 Magnetic Card Reader Kit Norwegian 2018627 009 Magnetic Card Reader Kit Danish 2018627 010 Trolley Caster Fixed Anti S tatic 2017784 002 Trolley Caster Swivel Anti Static 201
16. Aided System for Exercise Catoprl Catopril Cauc Caucasian Cer ceramic CFM cubic feet minute CGR computer graphic record Ch CH channel C L center line CLK clock signal Clonid Clonidine cm centimeter cm square centimeters Cmd command number CMMR common mode rejection ratio CMOS complementary metal oxide semiconductor c o in care of COMI communications port 1 COM2 communications port 2 ComLink communications link Comp composition Confrmd confirmed Cont CONT Continental continued Coumadn Coumadin CPR cardiopulmonary resuscitation CPU central processing unit CR diode CRC cyclic redundancy check CRD cord crt CRT cathode ray tube CSA Canadian Standards Association CTRL control D D A digital to analog DA damping relay dac DAC digital to analog converter A 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix A Abbreviations Standard Abbreviations DAN Dat Tim dBm dc DC DD DDD DEC Del DEMO DES DevId Diag Digital Digitox Digox Digoxin DIP Dirctry Diurt DOB DOS DP DPST DRAM DR DT DSKTP Dysopyr E ecg Ecg ECG ECO EDIC EEPROM e g EGA EMF EMI ENG EOF EPIC EPLD EPROM ESD etc etc EURO EXP F F1 F5 Fax FCC FE FILH Danish date time decibel referenced to 1 milliwatt into 600 ohms direct current double density day Digital Diagnostic Diskette Digital Equipment Corporation December delete demonstration designation device identification d
17. ECG analysis system 2020299 020 For your notes C 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC Electromagnetic Compatibility EMC Changes or modification to this system not expressly approved by GE Medical Systems could cause EMC issues with this or other equipment This system is designed and tested to comply with applicable regulation regarding EMC and needs to be installed and put into service according to the EMC information stated as follows WARNING Use of portable phones or other radio frequency RF emitting equipment near the system may cause unexpected or adverse operation WARNING The equipment or system should not be used adjacent to or stacked with other equipment If adjacent or stacked use is necessary the equipment or system should be tested to verify normal operation in the configuration in which it is being used Guidance and Manufacturer s Declaration Electromagnetic Emissions The MAC 5500 is intended for use in the electromagnetic environment specified below It is the responsibility of the customer or user to ensure that the MAC 5500 is used in such an environment Emissions Test Compliance Electromagnetic Environment Guidance The equipment uses RF energy only for its RF emissions Group 1 internal function Therefore its RF emissions
18. Fault Paper Out Detection Larry reports excessive paper travel without sensing paper as a paper out condition Revision A MAC 5500 resting ECG analysis system 2 33 2020299 020 Equipment Overview Theory of Operation Moe Analog Inputs Larry digitizes four analog inputs at eight bits resolution each Two inputs handle external analog signals such as those produced by ergometers or analog output blood pressure monitors Thermal printhead temperature is measured for use in compensating strobe pulse width to maintain constant print density over a wide range of thermal printhead temperatures The output of the thermal printhead pixel test hardware is also digitized to allow the resistance measurements on individual print elements Moe is responsible for controlling and monitoring the battery power supplies on off key system reset and related functions Moe runs continuously from 3V C even in the absence of AC power This continuous operation is necessary for Moe to accurately monitor the battery state of charge and detect power key presses System Startup When the system is off and the user presses the power key Moe begins the startup sequence If the battery contains sufficient charge or if AC power is applied the main CPU board power supplies 3V M and 5V M are enabled and after a suitable stabilization period SYSRESET is released Moe then keeps tabs on the system via a software watchdog that must be serviced b
19. Frequency of Transmitter Rated Maximum Output 150kHzto80MHz 180KHzto80MHZ e0 MHztog00MHz 800 MHz to 2 5 GHz Power of Transmitter in outside ISM bands in ISM bands Watts d 12 p d 12 p d 12 P d 23 p 0 01 0 12 0 12 0 12 0 23 0 1 0 38 0 38 0 38 0 73 1 1 2 1 2 1 2 23 10 3 8 3 8 3 8 73 100 12 12 12 23 NOTE 1 At 80 MHz and 800 MHz the separation distance for the higher frequency range applies For transmitters rated at a maximum output power not listed above the recommended separation distance d in meters m can estimated using the equation applicable to the frequency of the transmitter where P is the maximum output power rating of the transmitter in watts w according to the transmitter manufacturer NOTE These guidelines may not apply in all situations Electromagnetic propagation is affected by absorption and reflection from structures objects and people C 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC Compliant Cables and Accessories WARNING The use of accessories transducers and cables other than those specified may result in increased emissions or decreased immunity performance of the equipment or system The table below lists cables transducers and other applicable accessories with which GE Medical Systems claims EMC compliance
20. Ground 13 Door Open Detect 14 Ground Revision A MAC 5500 resting ECG analysis system 5 29 2020299 020 Troubleshooting CPU PCB Input Output Signals Thermal Printer J 12 Pin No Signal 1 Thermal Printer Power 2 Thermal Printer Power 3 Thermal Printer Power 4 Thermal Printer Power 5 Thermal Printer Power 6 Thermal Printer Power 1 Thermal Printer Power 8 Ground 9 Ground 10 Ground 11 Ground 12 Ground 13 Ground 14 Ground 15 Cue Sense 16 NC 17 5V Main Power 18 Ground 19 Data Strobe 20 Data Strobe 21 Data Strobe 22 Data Strobe 23 Data Load 24 Data Clock 25 Print Head Temperature 26 Pixel Data 5 30 MAC 5500 resting ECG analysis system 2020299 020 Revision A Troubleshooting CPU PCB Input Output Signals Floppy Disk Drive J 13 for floppy drive not installed Pin No Signal 1 5V Power 2 Index 3 5V Power 4 Drive Select 0 5 5V Power 6 Disk Change 7 NC 8 Media Sense 0 9 Media Sense 1 10 Motor Select 0 11 NC 12 Direction 13 NC 14 Step 15 Ground 16 Write Data 17 Ground 18 Write Gate 19 Ground 20 Track 0 21 Ground 22 Write Protect 23 Ground 24 Read Data 25 Ground 26 Head Select Revision A MAC 5500 resting ECG analysis system 5 31 2020299 020 Troubleshooting CPU PCB In
21. I 25 mm s Test Pattern I and 5 mm s Test Pattern These test patterns check the motor speed control and the paper speed Verify that the length of the printout from start to finish is 250 mm 5 mm Use the grids located on the top and bottom of the page for reference Do this for each of the three tests Z gt Y leicliccadacial nc fon bb dla o n n b n de d c o b n db da ba d dn bun db d n o a d ba a ol cid P al d aba e d d Sq b dn bud i 61A Revision A MAC 5500 resting ECG analysis system 5 11 2020299 020 Troubleshooting Diagnostic Tests Roller Test Uneven darkness can appear if AC power is on during this test After cueing printing should start at approximately 13 14 mm on the page The pattern appears as diagonal light and dark wavy bands 62A Isolated light spots indicate a flat spot on the roller and may indicate that the print carriage assembly needs to be replaced Awhite line across the length of the page indicates a missing print head dot Test Pattern Il A combination of Test Pattern I and Roller tests The first three pages consist of a series of triangular waveforms and various hashmarks The fourth page is a partial roller test Test Pattern Il Continuous Test Pattern II runs continuously until Stop is pressed Continuously Run Out Paper This test is used in manufacturing to test how well the unit self corrects tracking problems 5 1
22. MUSE system you will want to enter the Location number as well If an emergency situation dictates that you must complete the test without entering the patient data make sure you edit the record to add the missing information before you transmit it to the MUSE system Losing Fields When Transmitting Q Why do I lose the Referring MD and Technician names off of my reports when I transmit records to the MUSE system A Your MAC 5500 may be transmitting to the SDLC modem on the MUSE system instead of the CSI modem Check in System Setup to make sure you are transmitting to the MUSE system CSI phone number Revision A MAC 5500 resting ECG analysis system 5 23 2020299 020 Troubleshooting Input and Output Connectors Input and Output Connectors The following pages detail the input output signals for those connectors The pin by pin descriptions identify the signal names and pin outs for Table 2 A Pins J 1 66A each connector on the unit A Pins J1 Pin Name 1 Data 2 NC 3 Ground 4 45V 5 Clock 6 nc COM1 COM3 4 Pins J3 Table 3 COM1 COM3 4 Pins J 3 Pin COM1 Signal COM3 4 Signal 1 RTS COM3 TxD 2 CTS COM3 RxD 3 TxD 4 Ground 5 RxD 6 DTR COM4 TxD 7 12V 8 DSR COMA RxD n 5 24 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Input and Output Connectors COM2 Pins J5
23. Modem modulator demodulator MOS metal oxide semiconductor MPE metallized polycarbonate expitaxial ms milliseconds MS DOS Microsoft Disk Operating System MTBF mean time between failures mtg mounting MTR MOTOR MUSE Marquette Universal System for Electrocardiography mux multiplexer mV millivolt mVR minus inverted aVR N MAC 5500 resting ECG analysis system A 7 2020299 020 Appendix A Abbreviations Standard Abbreviations N neutral n a not available NA not applicable NC no connection Nitrate nitrates NLQ near letter quality NMI non maskable interrupt NMOS N channel metal oxide semiconductor No number NO normally open norm normal ns nanoseconds NSR Normal Sinus Rhythm O O off original OE other errors OEM original equipment manufacturer OH off hook relay OneSec one sector ORG orange Orig original OUT output OZ ounce P P P wave section of the ECG waveform p p peak to peak PA P wave amplitude Params parameters Passwds passwords PatData patient data PatInfo patient information PATN patient PC printed circuit personal computer PCB printed circuit board pF picofarad Pgm program Pgmld program identification Phenoth Phenothiazide Phenytn Phenytoin PID patient identification digit PLCC plastic leadless chip carrier PM power module pm PM post meridiem preventive maintenance PM 2 Power Module 2 PM 3 Power Module 3 pn PN part number PNH pan head PPA P wave amplitude PR ECG signal interval Pro Off progressiv
24. Test The Ethernet Module Interrogation screen displays The test returns the device IP address and the subnet mask information If the Ethernet module test is unsuccessful the ID and firmware rev display N A Press any key to exit this test Acquisition Module Test Analog I O Tests Analog Output Test Follow the instructions on screen NOTE A shorting bar is required to perform this test Tests if the acquisition module is powered Tests if the acquisition module is communicating Displays the acquisition module lead wire noise 4 Indicates when one of the three acquisition module buttons is pressed 4 Displays software version of acquisition module Follow the instructions on screen to monitor the analog outputs using an oscilloscope The outputs monitored are m 12V m DC Output 1 m DC Output 2 ECG Output m TTL Trigger Output Four sets of outputs are possible Select the output sets using the arrow pad Revision A MAC 5500 resting ECG analysis system 5 15 2020299 020 Troubleshooting Diagnostic Tests Analog Input Test DCOut Loopback Test For example to test DCOut 1 connect oscilloscope to pin 2 and ground to pin 4 or 5 and select DCOut 2 OV and check oscilloscope for reading of 0 volts repeat for other selections If any of these readings do not match CPU may need to be replaced Follow the instructions on screen to connect a DC power supply to the DC input pins of the ANA TTL
25. aid EA 1 10 Equipment Overview ccccccccaceeeeeeeeeess 21 General Description cccscccecaeeeeeeeeeeeeuceeaeeaneaneaereaneags 2 3 Front VIEW cosido det melee do Nahe det Sen ved selbe det 2 3 Back VIEW cu taire iar n e eae a E Er RR da 2 4 Connector Identification cccceceecee eee eeeeeeeeeaeeaneaneeneaneags 2 5 Detailed Description ccccceccucece ee eeeee cece rr 2 6 Block DIagram cer tee EDO ras Rc m e an cae a 2 6 Theory of Operation nennen 2 7 Overview Block Diagram cece cece eect ete e tenet e ee eenes 2 7 Power Supplles cessi pari tr rni rita e kRnz PPOMEPPEPRRRRERYTQIS 2 10 PVC AAA a ea Rc ed Aaa 2 10 ls Me 2 10 ME Leu mt DN a 2 10 Poe M cette Pcr eti NOD bna td APA MODEM ete tn 2 10 SO V EMIG aladas 2 10 HL OV oat dt Micra eco ts otia den b bota ni 2 11 FO O a ROO 2 11 Revision A MAC 5000 resting ECG analysis system i 2020299 020 REG 2VS aah 2 11 VANE A Mae 25a decis dani 2 12 Sc IU 2 12 Superl O and FPGA oo cece cece cette tent een teaeenes 2 12 CPU ATMELAT9IRM9200 sisse 2 12 CPU StoOges ai 2 13 RVG Sits raa dee etel et ee Mew RC Phe ele es A ce ea wes 2 13 CPU lei ta se tha Ex a p VEU borde p vicus died emer le d 2 13 External Bus Interface 0 cece eee eee ne 2 13 Boot Loadel cue e boue aras ped v ek eoe n 2 14 FPGA Intemal Logic uo tec c e c ee o eL ean 2 15 B atd ID Register 12 ci eee eT mm ep Eh ET relie dn 2 16 XBUS Controller aisi eint etae 2 16 Vi
26. cordless telephones and land mobile radio AM and FM radio broadcast and TV broadcast cannot be predicted theoretically with accuracy To assess the electromagnetic environment due to fixed RF transmitters an electromagnetic site survey should be considered If the measured field strength in the location in which the equipmentis used exceeds the applicable RF compliance level above the equipment should be observed to verify normal operation If abnormal performance is observed additional measures may be necessary such as re orienting or relocating the b Over the frequency range 150 KHz to 80 MHz field strengths should be less than 3 V m Revision A MAC 5500 resting ECG analysis system C 5 2020299 020 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC Recommended Separation Distances The table below provides the recommended separation distances in meters between portable and mobile RF communication equipment and the MAC 5500 The MAC 5500 is intended for use in the electromagnetic environment on which radiated RF disturbances are controlled The customer or the user of the MAC 5500 can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment transmitters and the MAC 5500 as recommended below according to the maximum output power of the communications equipment Separation Distance in Meters m According to
27. door is open Install a battery and connect the system to an AC wall outlet to charge the battery Connect the system to an AC wall outlet to charge the battery Close the writer door The system does not power up when operating from battery power The battery is empty Connect the system to an AC wall outlet to charge the battery The system shuts down when operating from battery power MODEM ERROR The remote device is not responding Would you like to retry X Lead disconnected message appears Battery is empty or the Automatic Shutdown feature is enabled Electrode s disconnected Modem not connected If wireless option Client bridge not connected Connectthe system to an AC wall outlet to charge the battery or power on the system Reconnect the electrode s Connect and retry Wireless option only MAC 5500 is not within range of access point Relocate MAC 5500 to within range of access point and retry transmission Cannot use the system because Device Password does not work Device Password has been changed or has not been adequately communicated to the staff NOTE Override the Device Password prompt by pressing the following keys at the same time C 9 0 63A 64A 65A For information about troubleshooting the MobileLink Standard Security option see MobileLink Installation amp Troubleshooting Guide PN 2002783 060 For information about
28. expose the wiring harness and ground wire 4 8 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines 4 Remove P2 from J2 on the power supply assembly and the ground wire connection from the power supply chassis Screws 3 Ground Wire ot Wiring Harness 40A Reassembly Reassemble the power supply reversing the steps for removal Before replacing the screws ensure that the ground wire is routed through the notch in the plastic and not pinched Revision A MAC 5500 resting ECG analysis system 4 9 2020299 020 Maintenance Disassembly Guidelines Top Cover Removal NOTE It is not necessary to remove the Power Supply prior to removing the top cover NOTE A 10 TORX driver is required for disassembly and assembly of the top cover 1 Remove the battery 2 Turn the unit over so the bottom side is up and remove the TORX screw through the hole on the right rear corner of the unit This screw is only visible and accessible with the battery removed 41A 3 Turn the unit right side up and press the internal access button and raise the top of the unit 4 Remove four 4 TORX screws Four 4 TORX screws 35A 5 Lower the top of the unit and lock in place 6 Raise the display to the vertical position 4 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines Reassembly Gently lift the
29. immediately after they are sent to the LCD This synchronous operation makes efficient use of the existing address generation hardware and provides flicker free fills regardless of region size If fills were unsynchronized they would often cross two successive display frames and result in visible tearing or flicker As a result of this frame synchronous operation fills always take one frame time regardless of their size and complete coincident with the end of the frame Main State Machine The SDRAM frame buffer is constantly in demand by the CPU the video timing controller and the fill engine The CPU manipulates pixels in the frame buffer in real time to construct the visible display while the video timing controller manages the constant stream of pixels from the frame buffer into the line buffer and on to the scroller CLUT At the same time any requested fills must access the frame buffer to write the requested fill region When all three contend for access to the frame buffer simultaneously memory bandwidth can exceed 100Mbytes sec The Main State Machine manages all these competing requests on a priority basis with display refresh taking top priority followed by fills and finally CPU accesses The state machine runs at 60Mhz processing line buffer fill requests from the video timing generator fill requests from the fill engine and read write requests from the CPU The 5 3 pack unpack logic and fill engine logic are actually
30. limits when connecting auxiliary equipment to this device Total system leakage current must not exceed 100 microamperes Table 4 Back Panel Connectors Item Name Description A A Connect an optional card reader or optional bar code reader B 1 Connect a GE KISS pump If system has the stress option connecta T2000 or external blood pressure device cable to this port C 2 Connecta local transmission cable serial line modem or client bridge wireless option D ANA TTL Connecta device requiring analog data or TTL trigger ultrasound stress echo ergometer analog treadmill blood pressure units etc E EXT VID Connect an external video display F IR Point ata MAC 5000 MAC 5500 or MUSE system s IR transceiver to transmit or receive ECG data G card slot Insertthe system card into this slot to archive or restore data from external media or to update software H ground lug Connect non grounded peripheral devices to ensure equipotential main AC power Insert the main AC power cable Revision A MAC 5500 resting ECG analysis system 2 5 2020299 020 Equipment Overview Detailed Description Detailed Description Block Diagram i n MAC 5500 with 006 Board Basic Block Diagram Nm a part of 006 board 79A 2 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Theory of Operation Overview Block Diag
31. or IRQ once every millisecond This interrupt provides the foundation for all operating system timers Acquisition Module Interface Overview The MAC 5500 acquisition module communication protocol is different from previous generations in several key respects 1 Acquisition module timing is synchronized to the system There is no longer a need to play synchronizing games to get the system especially the display and printer operating at the same sampling rate as the acquisition module 2 Data is framed and has checksum Previous acquisition modules offered rudimentary error detection This has finally been done nearly right Each ECG data packet contains a checksum 3 Commands do not interrupt the data stream Previous generation acquisition modules required a cessation of sampling to transmit commands to the module This cessation of sampling had the undesirable effect of breaking the acquisition stream for operations as simple as changing the line filter frequency or enabling or disabling the pace pulse detector With the MAC 5500 this restriction is removed 4 Buttons are supported Button state is communicated to the system in each ECG data packet This allows limited operator interaction with the machine via the acquisition module Details A constant reference clock frequency of 1MHz must be provided to the acquisition module for generation of its internal sampling clocks To eliminate the need for data lines comm
32. or update the software on the board as follows NOTE e e N 6 Connect the system to AC power before you begin the software update Keep the system connected to AC power during the software update and do not power off the system during the software update Press Power to turn on the system From the Main Menu select System Setup Enter the system password and press Enter Press Shift F3 The message below is displayed Please Insert SD Card Press Esc to cancel Insert the secure digital card A message similar to the one shown below is displayed Current Version New Software Version Press Enter to start installation Press the Enter key If the system is not connected to AC power the message shown below is displayed Please switch on AC Power Press Esc to cancel If the message shown above appears on the screen connect the system to AC power and continue with step 7 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines 7 A series of messages is displayed on the screen Copying code to Main Memory Erasing Flash Please Wait Programming Flash 10 96 If the system does not need a boot code update or does not require a user intervention for boot code update the last message to appears 18 Copying code to Main Memory Programming Over System is Shutt
33. provides a provision to update the SPI data flash with the primary boot program copy residing the NAND Flash FPGA Internal Logic All of the MAC 5500 resting ECG analysis system s proprietary hardware is contained in a single Xilinx FPGA that contains m XBus Controller m Video Interface LCD Controller with SDRAM frame buffer Video Waveform Scroller Interrupt Controller System Interrupt Generator Acquisition Module Interface Thermal Printhead Interface Serial EEPROM Interface BBus Interface Four PWM Analog Outputs Beep Generator Revision A MAC 5500 resting ECG analysis system 2 15 2020299 020 Equipment Overview Theory of Operation Board ID Register XBus Controller Video Interface The following descriptions give an overview of the FPGA s functionality For detailed information on the internal circuitry refer to the schematic For a programmer s eye view of the FPGA see the source file hardware h Where appropriate circuitry external to the FPGA is also described It is necessary to identify versions revisions of the CPU board automatically in the field The ATMEL primary boot code read the boot ID port pins to identify the FPGA image and startup code required for the board The board ID register contains a hardwired three bit code that tracks the FPGA image number indicating to the ATMEL just which FPGA image has been loaded Three additional FPGA inputs are reflected in this register to al
34. the power supply ground This places a high potential across the LED drive circuit as the power supply attempts to return its output current through the LED To prevent damage to the LED and driver it is implemented as a constant current source with a large compliance voltage Q108 provides the constant current drive and derives LED operating power from the MAX782 U24 VL output rather than from 3V C Q109 level shifts Moe s output to the level required to turn off Q108 during off periods Software update status Moe also uses the charge LED for indicating the software update progress indicator After system power ON if Moe does not find a Bbus status request within six seconds it flashes charge LED at 1Hz rate with 50 duty cycle for two minutes Battery Gauge Current flow into and out of the battery pack is monitored by Moe via a MAX472 Battery Current Monitor By integrating the current flow Moe is able to maintain a reasonable estimate of the battery pack s state of charge Moe s A D converter hasn t sufficient dynamic range to cover the full range of system currents at high resolution so some compromises must be made The current monitor s full scale range is set to a value that is likely to encompass normal operating currents Peaks above this level 6Amps are clipped The effects of this clipping are minimal as such high density printing occurs for short periods of time and represents only a small portion of system energy consum
35. various states of the Main State Machine 2 20 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Interrupt Management The LCD controller produces two interrupts to notify the CPU of the completion of important tasks At the end of the active region of each display frame the controller can generate an interrupt to tell the CPU it has uncontested access to the frame buffer for a short period and to synchronize display related processes in the CPU such as waveform drawing and scrolling control A similar interrupt is provided to signal the completion of fills Both interrupts may be disabled and or acknowledged in the system control registers Video Waveform Scroller There are numerous ways of achieving a scrolling waveform none of which is supported by standard LCD controllers The MAC 5500 provides scrolling through FPGA hardware placed between the LCD controller output and the LCD panel input To produce the scrolling effect it is necessary to maintain two virtual image planes one atop the other Static stationary objects are drawn in the static plane which appears nearest the viewer and may be either opaque or transparent Dynamic scrolling objects are drawn in the dynamic plane which appears behind the static plane and is always opaque though not necessarily visible The appearance of motion is achieved by continuously changing the start point for display of the dynam
36. very high speeds gt 100Mhz Format pack unpack logic The MAC 5500 display architecture is based on the division of pixels into static and dynamic planes As discussed elsewhere this technique allows the smooth scrolling of ECG waveforms across the screen while buttons annotations and other graphics remain stationary Previous generations of MAC 5000 display controllers packed the five bits of each static plane pixels into the same byte of memory as the three bits from the corresponding dynamic plane Revision A MAC 5500 resting ECG analysis system 2 17 2020299 020 Equipment Overview Theory of Operation pixel In that scheme pixel manipulations required the CPU to read the combined pixel modify either the static or dynamic component and write the result back to memory Such read modify write operations are time consuming In contrast the FPGA implementation of the frame buffer takes advantage of SDRAM s high speed large size individual byte addressability and 16 bit width to access both the static 5 bits and dynamic 3 bits portions of a pixel separately and simultaneously The SDRAM bus is effectively split into a dynamic byte lane and a static byte lane The resulting improvement in drawing algorithm speed is substantial The 16 bit wide bus of the SDRAM allows each read write cycle to access two bytes of data During writes upper and lower byte strobes allow independent writing of either or both
37. where each transaction exchanges a single byte between the host and peripheral Four PWM channels are provided for the generation of analog outputs Three of the outputs are available on the Analog I O connector the fourth is available internally for future use if any One of the PWM channels provides 12 bit resolution at 6KHz cycle rate the other three provide 8 bit resolution at 96KHz cycle rate The ATMEL CPU simply writes the desired value into a PWM data register and the output duty cycle changes on the next PWM cycle External analog circuitry converts the PWM logic signals to smooth analog voltages The 12 bit PWM channel is intended for ECG output and produces a swing of 10 to 10V The two 8 bit channels provide a unipolar 10V output Regardless of the resolution or swing range of each PWM channel the FPGA treats the data value as a signed 16 bit number representing a voltage from 10V Ox7fff to 10V 0x8000 Logic in each PWM channel ensures that the closest possible voltage is generated for each data value ex 0x8000 on an 8 bit channel produces zero volts output The FPGA PWM output signals contain a substantial amount of noise from 3V M supply fluctuations To reduce noise and establish an accurate reference level the PWM signals are buffered by CMOS inverters U18 that are powered from REF2V5 Although the CMOS inverters are powered by 2 5 Volts but are driven by 3 3 Volt logic no Revision A MAC 5500 resting ECG a
38. 000000900 m APC Super I O controller containing Two Serial Ports one dual mode RS 232 IrDA Clock Calendar Y2K compliant PS 2 Keyboard Port for card and barcode readers m Three Peripheral Microcontrollers The Three Stooges System Supervisor Battery Charger Gauge Moe Printer Motor Controller Analog Input Larry Keyboard Interface Shemp Revision A MAC 5500 resting ECG analysis system 2 9 2020299 020 Equipment Overview Theory of Operation Power Supplies 3V C 3V M 3V EMI 5V M 5V EMI The MAC 5500 resting ECG analysis system requires several regulated voltages for operation of its various components The Main Regulator provides most of the supply rails The supply rails are MAC 5500 resting ECG analysis system is never truly off The system supervisor microcontroller MOE must constantly monitor the power key and perform battery charging gauging The clock calendar in the Super I O chip must also maintain time date when the machine is off These functions are powered from the 3V C rail which provides power continuously from the battery pack regardless of the state of the rest of the system The Main Regulator produces 3V C directly from the battery rail via an internal low current linear regulator Only 5mA are available from 3V C so it must be used sparingly NOTE The MAX782 s low current regulator is dreadfully inefficient Regulator Q current appears to b
39. 0Mhz The pixels are then clocked out of the line buffer and presented to the scroller CLUT at a constant 24Mhz taking about 30us per line Double buffering is not required as the burst fill rate far exceeds the 24Mhz drain rate and the fill begins during the generation of horizontal sync giving the controller plenty of head start on filling the line buffer before the timing generator begins draining them out To keep the control logic simple and minimize SDRAM access overhead each 640 pixel line is transferred from SDRAM in one transaction This does hold off the ARM CPU for up to 11ys at a time but as the ARM CPU does not access the frame buffer often this is not thought to be an issue Fill Engine The 5500 routinely draws rectangular regions on screen for use in dialog boxes and buttons When drawn by the CPU frame buffer bandwidth becomes an issue as random accesses to the SDRAM buffer are inefficient and many of them are required to fill large regions of the display To reduce both CPU and frame buffer loading the LCD controller provides a simple fill engine which automates the filling of rectangular regions of the frame buffer and takes advantage of the burst capabilities of the SDRAM The fill engine interface is simple consisting of four boundary registers to define the fill region and one register to record the fill value and planes to be filled The fill engine can fill any value into any rectangular region of the displa
40. 1 1 1 Revision A MAC 5500 resting ECG analysis system 1 7 2020299 020 Introduction Equipment Symbols zt gt In Europe this symbol means dangerous or high voltage In the United States this symbol represents the caution notice below CAUTION To reduce the risk of electric shock do NOT remove cover or back Refer servicing to qualified personnel This symbol indicates that the waste of electrical and electronic equipment must not be disposed as unsorted municipal waste and must be collected separately Please contact an authorized representative of the manufacturer for information concerning the decommissioning of your equipment The number found under this symbol is the date of manufacture in the YYYY MM format 1A 2A 3A 4A 5A 6A 7A 8A 9A 10A 11A 81A MAC 5500 resting ECG analysis system Revision A 2020299 020 Introduction Service Information Service Information Service Requirements Refer equipment servicing to GE Medical Systems Information Technologies authorized service personnel only Any unauthorized attempt to repair equipment under warranty voids that warranty It is the user s responsibility to report the need for service to GE or to one of their authorized agents Equipment Identification The serial number label is located inside the device where shown below SERIAL NUMBER 12A Every GE Medical Systems Information Technologies device has a unique seria
41. 1115 102 Keyboard Assembly Stress German 421115 202 Keyboard Assembly Resting French 421115 103 Keyboard Assembly Stress French 421115 203 Keyboard Assembly Resting Spanish 421115 104 Keyboard Assembly Stress Spanish 421115 204 Keyboard Assembly Resting Swedish 421115 105 Keyboard Assembly Stress Swedish 421115 205 Keyboard Assembly Resting Italian 421115 106 Keyboard Assembly Stress Italian 421115 206 Keyboard Assembly Resting J apanese 421115 107 Keyboard Assembly Stress apanese 421115 207 Keyboard Assembly Resting Dutch 421115 108 Keyboard Assembly Stress Dutch 421115 208 Keyboard Assembly Resting Norwegian 421115 109 Keyboard Assembly Stress Norwegian 421115 209 Keyboard Assembly Resting Danish 421115 110 Keyboard Assembly Stress Danish 421115 210 Keyboard Assembly Resting Czech 421115 111 Keyboard Assembly Stress Czech 421115 211 Keyboard Assembly Resting Hungarian 421115 114 Keyboard Assembly Stress Hungarian 421115 214 Keyboard Assembly Resting Polish 421115 115 Keyboard Assembly Stress Polish 421115 215 Keyboard Assembly Resting Simplified Chinese 421115 113 Keyboard Assembly Stress Simplified Chinese 421115 213 Power Cord Generic PTO Option Class POWERCORDS Power Cord 125V 6FT Stress 80274 006 Power Cord 125V 6FT SE 80274 004 Revision A MAC 5500 resting ECG analysis system 6 5 2020299 020 Parts List Field Replaceable Units Field Replaceable Units
42. 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Diagnostic Tests Battery Tests NOTE The minimum discharge capacity is 2000 mAH Consider replacing the battery if this number is less than 2000 mAH Battery Status Displays and constantly updates the following information m Percent of charge remaining m Battery voltage With a reading of 80 or more for percent of charge remaining the battery voltage should be between 15 and 24 volts If battery voltage is below 15 volts the battery may need to be replaced m Battery current If battery current is less than 0 7 amps with AC power not applied the main CPU may need to be replaced For example Consider replacing the main CPU if the battery current is 0 8 amps with AC power not applied Battery temperature Maximum and minimum battery temperature Ambient temperature inside the unit If the ambient temperature inside the unit is more than 10 greater than the current room temperature Maximum and minimum ambient temperature Current battery charging status Battery Discharge Test This test charges the battery to full capacity if necessary then monitors a discharge cycle NOTE To cancel the test at anytime press the ESC key 1 To perform the battery discharge test plug the unit into AC mains power 2 Select Battery Discharge Test The battery discharge test window will appear and the unit will begin to charge the b
43. 5 C best if below 40 C Vectorcardiography Item Description Report Formats Vector loops of component vectors P QRS ST T Sensitivity 20 40 80 160 mm mV Time Resolution 2 ms B 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix B Technical Specifications Technical Specifications Hi Res and PHi Res Signal Averaged Electrocardiography Item Description Frequency Response Input 3 dB 0 01 and 250 Hz Frequency Response Output Upper Limit 250 Hz Lower Limit 0 01 25 40 or 80 Hz Sensitivities Raw Data and Template Average Beat Filtered Signals and Vector Magnitude 20 mm mV 20 mm mV and 50 mm mV 1 mm uV Analysis Sampling Rate 1000 samples per second per channel Digital Sampling Rate 4000 samples per second per channel High Low Pass Filters Spectral filter using Fast Fourier Transform FFT ADC Resolution 1 22 uV LSB Analysis Resolution 0 1525 u V LSB Physical Item Description Height 9 4 cm 3 7 in with display closed Width 38 1 cm 15 0 in Depth 35 1 cm 13 8 in Weight 6 8 kg 15 lb without paper 1 without trolley Environmental Item Description Operating Conditions Temperature Relative Humidity Atmosphere Pressure 10 C to 40 C 50 F to 104 F 1 20 to 95 RH noncondensing 700 to 1060 hPa Revision A MAC 5500 resting ECG analysis system 20202
44. 7785 002 Trolley Caster Kit Anti S tatic 2024418 001 North American MobileLink Assembly Ultra High Security 2023922 001 Revision A MAC 5500 resting ECG analysis system 2020299 020 6 7 Parts List Field Replaceable Units Field Replaceable Units Continued Item Part Number North American MobileLink Assembly Symbol 2014403 002 European MobileLink Assembly S ymbol 2014403 003 CPU Board 801212 006 CAM 14 Acquisition Holder for new trolley only 2026528 001 SD card with 9A software 2026831 001 SD card for external storage 2027268 001 10 Torx Screws M3 X 8MM TORX SEMS 418545 001 Rear Bezel 2023119 001 Comm Board Guide 2025484 001 Assembly Wireless Troy Serial Server USA 2026821 001 Assembly Wireless Troy Serial Server Europe 2026821 002 Power Supply Wireless Troy Serial Server 2026825 001 Power Supply MAC 5000 Wireless Symbol and Ultra High Security 2013212 001 6 8 MAC 5500 resting ECG analysis system 2020299 020 Revision A Appendix A Abbreviations evision MAC 5500 resting ECG analysis system 2020299 020 For your notes A 2 MAC 5500 resting ECG analysis system 2020299 020 Revision A Appendix A Abbreviations Standard Abbreviations Standard Abbreviations A A ampere A ang antianginal A arh antiarrhythmic A coa anticoagulants A hyp anti
45. 99 020 B 5 Appendix B Technical Specifications Technical Specifications Environmental Continued Item Description Transport Storage Conditions Temperature Relative Humidity Atmosphere Pressure 40 C to 70 C 40 F to 158 F 15 to 95 RH noncondensing 500 to 1060 hPa Disposal Batteries Device Disposing of battery by fire or burning will cause the battery to explode The battery is recyclable Follow local environmental guidelines concerning disposal and recycling Batteries may be returned to GE Medical Systems Information Technologies service for recycling Recyclable 1 Paper discoloration may occur at higher temperatures B 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix B Technical Specifications Technical Specifications Safety Item Description Certification UL 60602 1 classified UL classified for CAN CSA C22 2 No 601 1 CB certified for IEC 60601 1 CE marking for Council Directive 93 42 EEC concerning Medical Devices Meets applicable AAMI EC 11 requirements Type of Protection Against Electrical Shock Class 1 internally powered Degree of Protection Against Ingress of Liquids Ordinary Handling of Disposable Supplies and Use only parts and accessories manufactured or recommended by GE Medical Systems Other Consumables Information Technologies Follow manufacturer s instructions for
46. A SB SCL SD SE sec sec s SEER SING SP SPA SPDT SRAM ST T standrd Standrd STD STE STJ STM stmts Stmts supply mains second select switch s wave amplitude slow blow safe current limits schematic diagram S wave duration serial input output errors second seconds Solid state Electronic ECG Recorder Singapore Spanish S wave amplitude single pole double throw static RAM ST T wave section of the ECG waveform standard standard ST segment displacement at the end ST segment displacement at the J point ST segment displacement at the mid point between STJ and STE statements permanently installed power source SVT power cord type 300 V sw SW switch software SW Swedish Sweden T T Tone touch tone TA T wave amplitude Tant tantalum TDML treadmill TE timeout errors Tech technical Thiazid Thiazide TM trademark Tot total TP test point TPA T wave amplitude TRAM Transport Remote Acquisition Monitor Tricyli Tricylic antidepressant TTL transistor transistor logic TTL levels TVS transient voltage suppressor U UE undefined errors uF microfarad UL Underwriters Laboratory Inc Unconf unconfirmed UUT unit under test V v V volt volts V1 V6 precordial leads V123 V1 V2 V3 A 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix A Abbreviations Standard Abbreviations V3R precordial lead V456 V4 V5 V6 V4R precordial lead V ac volts alternating cur
47. Analog Pins J6 Table 4 COM2 Pins J 5 s Name RTS CTS TxD Ground RxD DTR 12V DSR Co MI GD UT A wj N e 67A v 5 Name Table 5 Acquisition Module Connector J 6 12V DC Output 1 TTL Trigger Output Ground Ground DC Output 2 DC Input 1 ECG Output DC Input 2 CoO Dy OT BY wj N Ra 68A Revision A MAC 5500 resting ECG analysis system 2020299 020 5 25 Troubleshooting Input and Output Connectors EXT VID Pins J7 Table 6 External VGA Video J 7 Pin Name 1 Red Video 2 Green Video 3 Blue Video 4 Ground 5 Ground 6 Ground 7 Ground 8 Ground 9 NC 10 Ground 11 Ground FA 12 NC 13 Horizontal Sync 14 Vertical Sync 15 NC 5 26 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting CPU PCB Input Output Signals CPU PCB Input Output Signals Battery Pack Monitor J 2 Pin No Signal 18V Battery Power 18V Battery Power Battery Temperature Sense 3V Temperature Sense Power Battery Ground Cc Uc A WI N e Battery Ground LCD Backlight J 4 Pin No Signal 12V Power 12V Power 12V Power Ground Ground Brightness Select Backlight Enable NC wo CO DY HT A w N Ra
48. CG analysis system 3 3 2020299 020 Installation P reparation for Use Trolley Height Adjustment The optional MAC 5500 Trolley can be assembled for one of two heights 92 07 cm 36 25 inches or 84 45 cm 38 25 inches The trolley is normally shipped at the 92 07 cm 36 25 inches height but can be changed to fit your needs To change to the lower height use the following steps 1 Tip the trolley on its side and using a 1 2 inch socket remove the 4 outer 1 2 inch bolts and slide the base assemble up on the column 14A 2 Remove the remaining bolts and mounting plate 15A 3 Flip the mounting plate and reverse the procedure 3 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation P reparation for Use CAUTION Do not over tighten Over tightening the bolts may cause them to strip 16A 17A Revision A MAC 5500 resting ECG analysis system 2020299 020 3 5 Installation P reparation for Use Installing the MAC 5500 resting ECG analysis system To secure the MAC 5500 to the trolley assembly follow these steps 1 Lock the wheels to prevent the trolley from rolling 18A 19A 3 Place the unit on the trolley surface then slide it on until the unit is firmly in place and under the tab at the rear of the on the tray 20A 3 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation P reparation for Use 4 Sec
49. CG data packet words 5 10 and 15 to guarantee there will never be a run of more than 80 bits of one s or zeros for that matter so there is no possibility of satisfying the idle period requirement in the middle of a data packet Because the acquisition module clock is supplied by the FPGA receive timing errors are limited to phase uncertainty By searching for the beginning of the start bit in a fashion similar to that used by a UART the phase uncertainty is eliminated and the remainder of the packet may be received without further synchronization In practice the FPGA uses every edge in the receive data stream to re sync its bit sampling circuit It is possible for the ECG data to be all zeros or ones so runs of as many as 80 zeros or ones could occur before a marker word is encountered in the data stream which contains at least one 1 and one 0 to break any runs in the data The acquisition module supports a special code update mode for rapid reprogramming of its on board code memory To increase the update speed the acquisition module echoes each uploaded code byte with a single reply word rather than the usual 16 word data packet The FPGA receive logic provides a special 1 word reception mode to accommodate this Thermal Printhead Interface The ATMEL CPU sends print data to the thermal print head through a buffered serial interface The FPGA implements the data buffer serializer strobe latch pulse generator
50. CISPR11 are very low and are not likely to cause any interference in nearby electronic equipment RF emissions CISPR11 oe The equipment is suitable for use in all Harmonic Emiesions establishments including domestic EN 61000 3 2 Class A establishments and those directly connected to the public low voltage power supply network Voltage fluctuations that supplies buildings used for domestic Flicker emissions Complies purposes EN 61000 3 3 Revision A MAC 5500 resting ECG analysis system C 3 2020299 020 Appendix C Electromagnetic Compatibility Electromagnetic Compatibility EMC Guidance and Manufacturer s Declaration Electromagnetic Immunity The MAC 5500 is intended for use in the electromagnetic environment specified below It is the responsibility of the customer or user to ensure that the MAC 5500 is used in such an environment Immunity Test EN 60601 Test Level Compliance Level Electromagnetic Environment Guidance Electrostatic discharge Floors should be wood concrete or ceramic ESD 6 kV contact 6 kV contact tile If floors are covered with synthetic EN 61000 4 2 8 kV air 8 kV air material the relative humidity should be at least 3096 Electrical fast 2 kV for power supply lines 2 kV for power supply lines Mains power should be that of a typical transient burst EN 61000 4 4 1 kV for input output lines 1 kV for input output lines commercial or hospital environment Surge
51. Cleaning A eO peer 5 20 Battery Capacity eese hcegeo per perrebeRC e eye pin Stade Get 5 21 Systems etp iuc pec IRURE CA ESA 5 21 Location NUImber htt erm Et abies diia de 5 21 Patient Questions iiis 5 21 PASS WO 2 aee one acier aem ar rg cene pe SA dava 5 22 Glinicali 2 ct OEC On 5 22 Report Format eins certian a rd 5 22 Hi Res andPh Res ccc ccc eect ete n 5 22 hip C CEDE 5 22 Entering Patient Data 0 0 cece cece cece nee 5 23 FranS MISSION 1525 c tratado rol th 5 23 Losing Fields When Transmitting 0cccecceueeeeeeeeaeeaes 5 23 Input and Output ComnectorS occcccccccoccccir nnn n nnns 5 24 APS A ATOA 5 24 COMIA GOM3 4 PINs irrita eer dn teta 5 24 Revision A MAC 5500 resting ECG analysis system V 2020299 020 COMO PINS AAA 5 25 Analog Pis eio tp pra rola eee 5 25 EXT VID Pis liar t TR acea daca tr s 5 26 CPU PCB Input Output Signals ccccce cece ee eee e eee n nnn 5 27 Battery P ack Monitor J2 meca aia Ade en tonic 5 27 LCD Backlight 4 o arisia inia ec dd a 5 27 Keyboard J A 5 27 LED JLO icones O A AA QE 5 28 Power Supply Motor 11 scc esepesk rer rh nnrir tr HEP UU ERR ant ered 5 29 TheralPrinter Mai tc e ca 5 30 FloppyiDisk Drive 13 eroe Ense novere ber teet feet te bets dn 5 31 Acquisition Module J 14 rr e Ere e Hee 5 32 Parts List aaa OL Ordering Parts enne 6 3 General lNformationns ecc tet reb e ert re Ma d iin d 6 3 Field Replaceable Units
52. MAC 5500 Resting ECG Analysis System Service Manual 2020299 020 Revision A GE Medical Systems Information Technologies gemedical com NOTE The information in this manual only applies to MAC 5500 resting ECG analysis systems with product code SCD It does not apply to earlier software versions Due to continuing product innovation specifications in this manual are subject to change without notice MUSE CASE MAC MARS and 12SL are trademarks owned by GE Medical Systems Information Technologies a General Electric Company going to market as GE Healthcare All other marks are not owned by GE and are instead owned by their respective owners 2005 General Electric Company All rights reserved T 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 25 July 2005 Contents Introduction ninia as aa Ltd Manual Information erien innne o a a aA 1 3 Revision Hist daria te acl a dank A AAE 1 3 Manual PUDO cometida tic oca pes ORERE P pit En 1 3 Intended Audience 0 sisse ems 1 3 Warnings Cautions and Notes ccccceccaeeeeeecceuaeeaeeaneaneaneags 1 4 Safety Messages c0ococccccccac cn 1 5 Responsibility of the Manufacturer 0 cece ne 1 5 Generali inariana t RR a aerate eer 1 6 Equipment Symbols ennemis 1 7 Service Information snn EA EA 1 9 Service Requirements aa 1 9 Equipment Identification isses ne 1 9 Serial Number Format saaier piiri PESE PUER agrees 1 10 tabel Format
53. Real Time Clock of the system is provided as a part of the Super I O controller The timing for this function is derived from its own 32 768 Khz crystal The ATMEL AT91RM9200 replaces the Strong ARM SA1110 used in 005 board The AT91RM9200 uses high performance low power consumption and high code density ARM920T processor core One of the major difference between SA1110 and AT91RM9200 is the absence of built in LCD controller and 16 bit static memory controller StrongARM support 32 bit memory interface The Processor Clock and External Bus speed is limited to 180 and 80 MHz when compare with the 206 and 103 MHz of StrongARM But having an external LCD controller with a separate video memory interface compensates overall performance of the 006 board The external bus interface width is limited to 16bit in ATMEL CPU when compare with the 32 bit interface of StrongARM All the non VGA FPGA registers are either 8 bit or 16 bit wide However all these were accessed using 32 bit access in 005 board and aligned to 32 bit word To port the applications that was written for the 32 bit access all the Non VGA memory space within the FPGA are accessed in 32 bit mode in 006 board When the ATMEL static memory controller see a 32 bit memory access it perform two consecutive 16 bit access To avoid over writing of FPGA register with upper 16 Byte data The FPGA register access logic is designed in such a way that the FPGA ignores upper 16 byte access Ho
54. The video output is referenced to a filtered tap FB107 C29 off the 3V M supply rail and then level shifted back to ground Each DAC is comprised of six binary weighted resistors and a seventh blank sync signal resistor The FPGA LCD data outputs sink current through the 75Q load resistor in proportion to their respective DAC resistors The voltage across the 75Q load resistor represents the sum of all drive currents Minor non linearity is introduced in the DAC transfer function by the fact that the summing junction varies in voltage with DAC current The 3 3V referred video is shifted back to ground by a blocking capacitor The shifted video signal is buffered and further shifted by emitter followers Transistors clamp the negative excursions of the bases of the emitter followers to one diode drop above ground so the most negative level at the emitter of the emitter followers is ground Nominal full scale swing is 1VP P blank to white Bias for the base of the clamp transistors is provided by a 1 4V bias supply consisting of a stack of two diode connected transistors Q8 This 2Vbe bias exactly cancels the 2Vbe shift produced by the level clamp and output buffer Since all transistors are of the same type their Vbe s track well enough to provide acceptable output offset Diode clamps to ground and 8V EMI provide ESD protection for the VGA video and sync signals The 3V EMI rail is isolated from ESD transients by FB106 Acquisiti
55. age of the 16 bit wide nature of the asynchronous bus to allow bursts of two pixels into and out of memory when possible This nearly doubles frame buffer bandwidth over a byte at a time interface Finally as mentioned previously the CPU is able to manipulate individual pixels in either plane without resorting to read modify write access cycles This provides another twofold improvement in memory bandwidth Line Buffer Within each line of LCD video data bytes must move from the frame buffer to the scroller CLUT in an unbroken stream at 24Mhz Although the frame buffer is capable of burst transfers of 60Mpixels sec it cannot be depended on to maintain that speed for more than one SDRAM page 256 pixels At page boundaries the SDRAM must initiate a new page access and potentially satisfy refresh requirements Since video lines are longer 640 pixels than SDRAM pages some mechanism is required to smooth the flow of pixels from the frame buffer to the LCD This smoothing is provided by a 1024 byte dual port line buffer implemented in a pair of FPGA block RAMs At the end of each active LCD line the video timing generator requests a new line of pixels from the frame buffer The memory arbiter services the request by bursting 640 pixels from the frame buffer to the line buffer using the video address supplied by the timing controller The entire line of 640 pixels is moved at maximum memory speed taking a little over 11us to complete at 6
56. ance Whenever internal assemblies are serviced NOTE The accuracy of the leakage tests depends on the properly wired wall outlet Do not proceed until you verify the integrity of the power source WARNING Total system leakage must not exceed 300 microamperes Table 2 Leakage Tests and Maximum Allowable Leakage Currents Test Maximum Current uA 1 Ground wire leakage to ground 300 2 Chassis leakage to ground 100 3 Patient cable leakage to ground 10 4 Patient cable leakage into patient leads from 120 V ac 20 NOTE Maximum Current readings for Tests 3 amp 4 apply to the MAC 5500 at 120 VAC only and do not apply to other equipment 4 26 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Domestic Electrical Safety Tests Leakage Test Diagrams These diagrams show only a representation of how a typical leakage current tester functions Follow the instructions provided with the leakage current tester that you use Test 1 Ground wire leakage to ground Tester Tester To be tested power connector on back of tester may not be labeled on some testers power Polarity UUT Line cord i Norm T DOW a ine cor Neutral 1 9 Unit I under Neutral test Gnd y T Rvs UUT I a Gnd I o I I I Meter 1_ _ connectors 49A Test 2 Chassis
57. and information is encoded on this reference clock by altering its duty cycle The FPGA provides a serializer for the command bytes and clock generator modulator to transmit both the clock and command bits from the serializer The reference clock duty cycle is nominally 50 By altering the duty cycle the DC content of the clock is changed The acquisition module detects this change in DC level The timing of these shifts in DC offset encode command data bits A zero is encoded as a single shift in duty cycle from 50 to 25 lasting 31 25us followed by a refractory period of 468 8us A one is encoded as a pair of 31 25us periods of 25 duty cycle separated by 93 75us followed by a 343 8us refractory period In either case the transmission of a single bit takes 500us A higher level protocol organizes commands as groups of 8 bits Data from the acquisition module is packed into 257 bit NRZ frames The receive line idle state is high The first bit of each packet is a zero and Revision A MAC 5500 resting ECG analysis system 2 23 2020299 020 Equipment Overview Theory of Operation serves as the packet start bit As with a UART the start bit is discarded The following 256 bits are received into a 16 word x 16 bit buffer for use by the ATMEL CPU The receive logic then looks for an idle period analogous to a UART stop bit of at least 125us in length as an indicator that the link is again idle Special marker words are inserted into the E
58. and power switch gate drive pump Special interlocks are implemented to prevent stuck strobe signals or printing when the battery voltage is critically low Each print line requires 1728 bits of data To conserve FPGA resources each line is divided into three chunks of 512 bits each with one leftover chunk of 192 bits The FPGA provides a single 32 word x 16 bit buffer 512 bits to hold the print line data After writing a chunk of data to the buffer the ATMEL CPU enables serialization of the data by reading one of two registers to support the serialization of either a full 512 bit or partial 192 bit buffer When the entire print line has been loaded the ATMEL CPU cues a print strobe by writing the required strobe width value to the strobe latch pulse generator When the strobe register contains a non zero value the power switch gate pump produces a differential clock signal to drive an external diode voltage doubler CR132 133 C262 C264 R290 The output of the voltage doubler drives the gate of a power MOSFET Q6 that provides power to the print head R288 provides gate bleed off to ensure that Q6 turns off when the pump stops C279 filters the doubler output to DC A special test mode is provided to allow testing of the thermal print head In test mode print head power is disabled and the strobe signal is driven 2 24 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Se
59. anel surrounding the LAN and modem ports Use a 10 Torx driver 118A 2 Grasp the sides of the COMM board connectors Work the board back and forth in the slot as you pull it toward you to remove it from the device 119A 3 Insert the new COMM board It will snap into place 120A 4 Replace the panel surrounding the LAN and modem ports Replace the screws Revision A MAC 5500 resting ECG analysis system 4 21 2020299 020 Maintenance Disassembly Guidelines Writer Roller Carriage Assembly Removal 1 Remove the power supply assembly following procedures above 2 Inside the power supply compartment disconnect the cable that connects to the writer assembly 3 Open the unit to access the paper compartment Move the paper size bracket to the A4 position to expose one of the writer assembly mounting screws 4 Remove the screw and return the paper size bracket to the 8 5 x 11 position 5 Close the unit and turn it over so the bottom side is up 6 Remove the four screws located on the underside of the writer roller carriage assembly and lift the writer from the bottom of the unit Reassembly Reassemble the writer roller carriage assembly by reversing the above procedures 4 22 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines Trolley Casters Removal 1 Remove the MAC 5500 and all loose items from the trolley and then place the trol
60. as a modem or the KISS vacuum electrode pump is available on the COMM connectors Power may be turned on off under software control and current limiting is employed to protect internal operations from excessive external loads The current requirements and startup conditions of the KISS pump require very high currents U L limits power to external devices to 15 Watts for reducing the likelihood of fire during overload The KISS and U L requirements conflict to a degree that a simple current limiter will not satisfy both needs therefore a special current limiter circuit had to be devised Six Sigma project 27118 Mac3000 Com Port Power Circuit project addressed this issue and is implemented in this design Since currents exceed 1 Ampere and the supply is 12 Volts a linear current regulator is impractical since the pass element would need a heatsink The method chosen here was to use a FET Q2 as a switch a switch is either on or off and in both cases dissipates little power In normal operation the ENIOPWR signal is driven high by software to activate the power switch This signal saturates transistor Q103 which provides the gate drive for the dual FET Q2 Both P channel FETs of Q2 are used and therefore are connected in parallel Return current from the load is sensed by shunt resistor R4 0 10 U7 is used as a differential amplifier to boost this current sensed signal U5 is used as an integrator which integrates the amplifier current limit sig
61. atic objects 1 of the colors is transparent leaving 31 real colors In practice to freeze dynamic objects in the static plane requires that the 8 dynamic colors be replicated in the static color map leaving only 31 8 23 new colors available for static objects The FPGA implements a writable color lookup table CLUT to map the pixel values to sensible colors on the LCD The CLUT provides 32 to 24 bit entries Revision A MAC 5500 resting ECG analysis system 2 21 2020299 020 Equipment Overview Theory of Operation providing access to the complete color space offered by the LCD panel The color mapped LCD data is also fed to three external discrete 6 bit DAC s to create analog video for an external CRT Blank Sync External VGA monitors are supported with two styles of video sync signal as well as retrace blanking Video Sync The horizontal and vertical sync pulses from the LCD controller are combined to produce a composite sync signal that is added to the video signal The video sync signal may be disabled under software control to accommodate monitors that do not accept sync on green The sync signal is applied to all three video guns to eliminate color shifting in systems that do not perform blank level video clamping TTL Sync For monitors that do not accept sync on green TTL logic level horizontal and vertical sync signals are provided These may be enabled disabled to implement a rudimentary sleep operat
62. ation MAC 5500 ST Requirements and Configuration Following is a list of interface requirements and setup configurations required for the devices listed when used with the MAC 5500 ST option Compatible Blood Pressure Units Colin Model ST 780 Connection Requirements Use cable PN 2008112 001 to connect from the MAC5500 port 1 to the Colin serial port Use cable PN 2008111 001 to connect from the MAC 5500 ANA TTL port to the Colin QRS trigger input Device Configuration Requirements None MAC 5500 Configuration Requirements At the Main Menu complete the following in the order shown below Select System Setup Enter System password Exercise Test Inputs Outputs 999 Change Blood Pressure to Nipon Colin Sun Tech Model Tango Connection Requirements Use cable PN 2008113 001 to connect from the MAC 5500 port 1 to the Sun Tech serial port Use cable PN 2008111 001 to connect from the MAC5500 ANA TTL port to the Sun Tech QRS trigger input Device Configuration Requirements At the Tango Main Menu complete the following in the order shown below Select Utilities Select Device Scroll to ECG Trigger and press enter Scroll to DIGITALT and press enter Scroll to EXIT and press Enter Scroll to Test Parameters and press Enter With Technique highlighted press Enter Scroll to DKA and press Enter Scroll to EXIT and press Enter Scroll to EXIT and press Enter to return to the display scre
63. attery 3 Once the battery is fully charged the message Turn the AC power to the unit OFF will appear 4 Unplug the unit from AC mains power and select OK 5 Re select Battery Discharge Test The battery will begin to discharge When the battery has fully discharged the unit will shut off 6 Reconnect the unit to AC power and turn the unit on Go to Print Discharge Test Results Monitored information written to the internal memory includes Revision A MAC 5500 resting ECG analysis system 5 13 2020299 020 Troubleshooting Diagnostic Tests Discharge capacity in mAH Battery temperature Battery charge status 9 2 Percent of charge remaining Battery Charge Test This test completely discharges the battery if necessary then monitors a charge cycle NOTE This test can take up to 6 hours to run The Battery Discharge Test is a better indicator of the condition of the battery 1 To perform the Battery Charge test unplug the unit from AC mains power 2 Select Battery Charge Test The Battery charge test window will appear and the unit will begin to discharge the battery 3 Once the unit has fully discharged the battery plug the unit back into AC mains power The battery will begin to charge 4 When the battery charge test is complete go to Print the Charge Test Results Monitored information written to internal memory includes Charge rate in mAH Battery temperature B
64. attery charge status Percent of charge Print Charge Discharge Test Results Prints the results of the last discharge or charge test to the writer Communication Tests COM Port Loopback Test The Communications Port Loopback Test sends various ASCII characters out the COM port s transmit lines and expects the same character to return in it s receive lines Upon completion of the test the word Passed or Failed appears depending on the results For each of the options listed COM1 COM2 COM3 and COM4 perform the following steps 1 Select an option and press the Enter key 2 Follow the instructions on screen and install loopback jumpers in the selected serial port 3 Remove the loopback jumpers when the test is complete 5 14 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Diagnostic Tests External Modem Test Internal Modem Test Ethernet Module Test Connect a modem to COM 2 and select External Modem Test The test returns the modem ID number firmware rev and current parameter settings If communication with the modem is unsuccessful the ID and firmware rev display N A Select Internal Modem Test The Internal Modem Interrogation screen displays The test returns the modem ID number firmware rev and current parameter settings If communication with the modem is unsuccessful the ID and firmware rev display N A Press any key to exit this test Select Ethernet Module
65. bytes During reads both bytes are always presented Unneeded read data bits are ignored by the CPU The LCD controller takes advantage of the individual accessibility of the bytes to eliminate the need for the CPU to pack and unpack the static and dynamic pixels At the expense of unused memory bits a small expense as less than 1 16th of the entire SDRAM space is needed at all the LCD controller maps the 5 bits of each static pixel into one SDRAM byte lane the static lane and the 3 bits of each static pixel into the other the dynamic lane Unused bits in each lane are written as zeroes and ignored on reading On the CPU side the SDRAM frame buffer appears as two regions the static and dynamic planes Each plane is a contiguous array of 480 lines of 640 pixels each Within the static plane the lower 3 bits the dynamic bits of each pixel byte are ignored on writes and read as zeroes Within the dynamic plane the upper 5 bits of each pixel byte the static bits are ignored on writes and read as zeroes The dynamic plane is located 1 2 Mbyte above the static plane and address bit A19 is used to differentiate between them The interface from the LCD controller to the CPU is 16 bits wide allowing two pixel bytes to be moved in each read write cycle In the 16 bit wide SDRAM each word independently byte addressable contains both a static and a dynamic pixel byte each in their own lanes When the CPU writes a pixel to the static plane
66. configuring FPGA in fly by fashion Wear leveling algorithm is implemented for the data storage NAND flash to extend the life Secure Digital Card Interface Serial EEPROM The SD card interface is provided to support software update and external data storage application The socket provide card detection and write protect status signal ATMEL CPU has built in secure digital card interface controller But there is a bug in the current revision of the ATMEL CPU which swaps bits within the transmitted received nibbles Since the software overhead to correct this is high SD card interface support only SPI mode However all the SD card interface signals are terminated at the connector through a set of resistors which are not placed so that we can go for the true SD card interface in future System setup information option enables and other machine specific data is stored in 32 KByte serial EEPROM The SPI interface to the EEPROM is provided by the FPGA Daughter Board Interface The interface is realized using a 100 pin high speed connector This interface provide two serial interfaces PC Card interface signals USB host and various power supply tappings The PC Card interface and USB interface are no longer in the requirement list All the PC Card signals are buffered The buffer will be active only when a valid PC card is inserted in the daughter board Out of the two serial interfaces one provides full hardware handshaking This is deri
67. connector The voltage of the DC input displays If test fails the main CPU board may need to be replaced Follow the instructions on screen to connect the DC Outputs to the Analog Inputs The test sends all possible values out the DC Outputs and confirms that the correct values are read from the Analog Inputs A pass fail result displays If either test fails the main CPU board may need to be replaced NOTE Pin numbers refer to the ANA TTL port ECGOut QRSTrigger Loopback Test Floppy Drive Tests Follow the instructions on screen to connect the ECG Output and QRS Trigger Output to the Analog Inputs The test sends all possible values out the ECG Output and a square wave out the QRS Trigger Output It confirms that the correct values are read from the Analog Inputs A pass fail result displays If either test fails the main CPU board may need to be replaced NOTE Pin numbers refer to the ANA TTL port This test does not apply to the MAC 5500 system Follow the instructions on screen A read write test is performed on a formatted floppy disk and a pass fail test result is displayed Try another disk if this test fails If this test continues to fail contact GE Medical Systems Information Technologies for service NOTE The following test and the resultant values are for manufacturing use only and NOT intended for service of this device A head radial alignment and Azimuth alignment test is performed using an Accurite test dis
68. cquisition interface the printer interface and the Stooges interface Bbus to name a few The FPGA uses a built in frequency doubler to raise this 24 Mhz clock to 48 Mhz for internal use All functions inside the FPGA use the clocks derived from 48MHz The main derived clocks are 1 MHz for acquisition interface 4 MHz for printer data shift clock interface 4 MHz for EEPROM data shift clock 24MHz for VGA LCD panel clock The VGA LCD controller that include the SDRAM frame buffer controller use 59 904 MHz external memory clock from ATMEL CPU in addition to the 48MHz FPGA clock CPU ATMEL AT91RM9200 The ATMEL AT91RM9200 has two oscillators Slow Clock oscillator and Main Oscillator The Slow Clock Oscillator use 32 768 KHz crystal for clock generation The CPU runs in Slow Clock mode 048M Hz after system reset Slow clock is also used by the built in RTC But the 006 board do not use the ATMEL RTC for the system timing requirements The Main oscillator use 18 432 MHz crystal Processor clock 179 712 MHz Master clock 59 904 for external Bus Interface and Peripheral Clocks are derived from main oscillator by the Master Clock Controller 2 12 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation CPU Stooges RTC CPU External Bus Interface Each of the three Stooges has its own 4 Mhz ceramic resonator for use in generating their respective clocks The
69. cument part number and revision letter at the bottom of the page The revision letter identifies the document s update level The revision history of this document is summarized in the table below Table 1 Revision History PN 2020299 020 Revision Date Comment A 25 J uly 2005 Initial release of this document Manual Purpose This manual supplies technical information for service representative and technical personnel so they can maintain the equipment to the assembly level Use it as a guide for maintenance and electrical repairs considered field repairable Where necessary the manual identifies additional sources of relevant information and or technical assistance See the operator s manual for the instructions necessary to operate the equipment safely in accordance with its function and intended use Intended Audience This manual is intended for the person who uses maintains or troubleshoots this equipment Revision A MAC 5500 resting ECG analysis system 1 3 2020299 020 Introduction Warnings Cautions and Notes Warnings Cautions and Notes The terms danger warning and caution are used throughout this manual to point out hazards and to designate a degree or level or seriousness Familiarize yourself with their definitions and significance Hazard is defined as a source of potential injury to a person Term Definition DANGER Indicates an imminent hazard which if not avoided will r
70. d I I on input vector electrode site I II III limb leads IC integrated circuit ID identification 1 e that is IEC International Electrotechnical Commission in inch IN input inc inc INC incorporated Info information Ins insert IO input output I P input ISA industry standard architecture Isosorb Isosorbide IT Italian Italy J JAN January JIS Japan Industrial Standards K k K kilo 1000 1024 Kb KB kilobyte kg Kg kilogram kHz KHz kilohertz kV KV kilovolt A 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix A Abbreviations Standard Abbreviations Kyb L L1 L2 LA Ib LCD Lcl Line Ld Grps LED LH Lidoca LL Loc LocPc LogRetry Ltd m M mA MAC mains voltage keyboard line level one level two left arm pound liquid crystal display local line lead groups light emitting diode left hand Lidocaine left leg location Local MAC PC log retry limited M meter megabyte metric vector electrode site vector lead male milliamperes Microcomputer Augmented Cardiograph voltage of a supply mains between 2 line conductors of a polyphase system or voltage between the line conductor and the neutral of a single phase system max maximum Measure measurements Med medications MEM memory MF metal film MHz megahertz min minutes minimum Misc miscellaneous mm millimeter MM minute MMM month mm mV millimeter per millivolt mm s millimeter per second
71. d is closed the DOOROPEN signal is shorted to ground When the lid is open a pull up resistor ensures a high level on DOOROPEN Moe monitors this line to detect lid open conditions that are reported to the system software to avoid misinterpretation of motor fault indications When the door is open the motor connections are lost and Larry receives no tachometer feedback from the motor Without knowing the cause of the lost tachometer info Larry can only respond with a paper jam condition Moe s knowledge of the lid state is used to suppress this error message as well as prevent further print operations AC Power Monitor Moe senses the presence of AC power through a voltage divider R102 101 which drives the under voltage detection comparator in the Battery Charger Vtrip approx 7V The battery charger will not be enabled unless the DC power supply voltage is above approximately 21V Battery Pack The MAC 5500 uses a 15 cell nickel metal hydride NiMH battery pack with integral thermal sensor for charge termination detection and self resetting thermal fuse for short circuit protection Charge current and normal system operating power are obtained from the AC power supply The charger circuitry monitors both battery charge current and power supply output current The battery is always charged at the maximum rate possible but system power demands take precedence over charger demands The charger automatically reduces charge current as requi
72. d stable reference voltage for such purposes VREF is derived from 5V EMI rather than 3V EMI to minimize the change in reference current with changes in input rail voltage The difference between 5V and 2 5V is three times greater than the difference between 3 3V and 2 5V If the absolute ripple on both supplies is the same the modulation of reference current will be 3 times less if power is derived from 5V Revision A MAC 5500 resting ECG analysis system 2 11 2020299 020 Equipment Overview Theory of Operation VAna VAna Clocks Super l O and FPGA The analog output circuitry is powered by a low current switched 12V rail provided by the Main Regulator VAna provides the positive supply for the output op amps A charge pump voltage inverter is provided to produce an approximate 11V rail for the op amps Although only the ECG output is bipolar all output amplifiers are driven from VAna A short circuit on either of the unipolar DC outputs could load VAna sufficiently to affect the negative peak swing of the ECG output The ECG and DC outputs are not required to operate correctly in the presence of abnormal loads Both of these devices uses the 24 Mhz clock oscillator Y5 to drive their internal requirements for various clock frequencies The main function of the Super I O IC is for serial port communication and real time clock all the needed timing comes from this oscillator The FPGA provides many functions including the a
73. deo Interface s ecce he erc ertet er RA harto en 2 16 Interrupt Controller esses mme 2 22 System Interrupt T Aer ide terea Mecenas 2 23 Acquisition Module Interface sssssss rro 2 23 Thermal Printhead Interface 2 24 Serial EEPROM Interface cece cece cette e 2 25 BBUS I itertace tes kawaii e eo C ES 2 25 PWM Analog Outputs 0 0 0 ccc c cece cee m 2 25 Beep Generator tn ny acacia od cancion aoe dae i arenes 2 26 PC Cardibogic iunc riche pospone cria 2 26 SDRAM a E eoe Aen Neate abr d 2 26 NAND TIaSl s tinea ce n et tart ene RR een emn 2 26 Secure Digital Card Interface iis 2 2 Serial EEPROM eec tir pepe rir pucr ML I T eer kn dn 2 21 Daughter Board Interface iiis nee 2 21 VGA LCD CRT Interface eere REP ERU vas ant ney 2 21 LCD Panel EMI Reduction Components cccceeseeeeaeenees 2 28 CRT Video DAC Sync Buffers erriari eraat i ire eaaa 2 28 Acquisition Module Transceiver Power Switch auaa ceca 2 28 TranscelVep osi ne aera dries PET PERPE Reda ne Een 2 28 Acquisition Power Regulator Switch sss 2 29 COMM Port Power Switch Current Limiter KISS Power usse 2 29 Thermal Printhead Power Pixel Test Hardware 0 cece ee eee 2 30 Super I O Peripheral Controller 2 30 RS 232 Serial Ports One Dual Mode RS 232 IrDA 2 30 AA O ta mh rastro n Aq y ti 2 30 P52 Keyboard Port sic eee a 2 31 The Three Stooges aci dation ne ba 2 31 Start
74. doI change what questions I see when I am entering the patient data The patient questions you see on the Patient Data window when starting a test were set up in System Setup Goto System Setup Select Basic System Select Patient Questions 9 Select the patient questions you want to include when entering the patient data for a test Press the esc key until you return to System Setup Select Save Setup Select To System 999 You can select Main Menu to exit System Setup Revision A MAC 5500 resting ECG analysis system 5 21 2020299 020 Troubleshooting Frequently Asked Questions Passwords Clinical Report Format Hi Res and Phi Res Editing gt Q e Can you set up a password for the Delete function that is different than the System Setup password No The password for the System Setup and the Delete function are the same How do I change the way an ECG looks when it prints out Do the following steps Go to System Setup Select ECG Select which type of ECG report you want to change Resting ECG Reports Pediatric ECG Reports 15 Lead Reports Select unconfirmed reports from the menu Find the report type you want the MAC 5500 to print Place the number of copies you want in the appropriate column If you want the MAC 5500 or 12SL interpretation included on the ECG put the number of copies you want in the with column If you do not want the MAC 5500
75. e about 3x the load current This makes conservation of load on 3V C crucial Most of the MAC 5500 hardware runs from 3V M The MAX782 provides this rail from the battery via a PWM synchronous switching regulator Moe controls 3V M in tandem with 5V M This is simply an RF blocked feed from 3V M 3V M load is contained within the CPU board Power for devices for external functions is supplied by 3V EMI The isolation of 3V EMI from 3V M may be unnecessary as the concept has never been tested for its effect The MAC 5500 resting ECG analysis system is not fully in the 3V age The Super I O and thermal printhead require 5V power The MAX782 provides this rail via another PWM synchronous switching regulator Moe controls 5V M in tandem with 3V M Similar to 3V EMI this rail is an RF blocked feed from 5V M used to power devices for external functions The isolation of 5V EMI from 5V M may be unnecessary as the concept has never been tested for its effect 2 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation 18V The Main Regulator s 5V switching output also supports generation of a non regulated 18V rail which is used to provide power for the acquisition module By providing the acquisition module with 11 5V linearly regulated power from the 18V rail of the main regulator rather than the main 12V regulator U15 acquisition is not affected by excessive current
76. e module is amplified and driven though Q101 The 006 board is designed to support multiple product and one of the requirement during the design phase was the support for PC Card through a daughter board But this requirement was removed later on The PC Card logic use the two ATMEL chip select signals and bus control signals to generate IO Memory and Attribute memory access to PC Card The PC Card bus controls signals from FPGA and the address and data lines form ATMEL are buffered and terminated to daughter board interface connector J21 Program code and working data is stored in a four 4MWord bank of 32 bit wide memory 64Mbytes This memory is made up of two 256 Mbit SDRAMs each 16 bits wide All bus timing and refresh control is performed by the ATMEL CPU SDRAM controller The SDRAM clock rate is one third of the ATMEL CPU clock or 59 904 Mhz Though the size requirement is less the video frame buffer also use 256Mbit SDRAM There are two 32 Mbytes NAND Flash in 006 board One is used for storing FPGA configuration data and system software The other is for data storage The access to NAND flash is through a dedicated smart media interface logic provided by ATMEL CPU Unlike 005 board 2 26 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation NAND flash chips are accessed through the buffer U53 instead of Xbus The NAND Flash control signals are changed to GPIO mode while
77. e offset Procain Procainamide PROM programmable read only memory Propran Propranolol MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix A Abbreviations Standard Abbreviations PSK phase shift keying PSU power supply unit Psych psychotropic PUP pull up signal PVC polyvinyl chloride PWM pulse width modulation PWR power PWR CRD power cord Q Q transistor QA quality assurance Q wave amplitude QAD Quality Assurance Deviation QAM quadrature amplitude modulation phase and amplitude modulation QC quality control QD Q wave duration QRS QRS complex portion of ECG waveform interval of ventricular depolarization QT QRS interval QTC QRS interval QTY quantity Quinid Quinidine R R resistor red reset RA right angle right arm or R wave amplitude RAM random access memory RC resistor capacitor RD R wave duration Ref reference refresh REN Ringer Equivalence Number Reserp Reserpine REV revision RevdBy reviewed by RevXmit reverse transmission rf radio frequency RFI radio frequency interference RGB red green blue RI ring indicate RL right leg RMR Rhythm and Morphology Report ROM read only memory RPA R wave amplitude RPD R wave duration rpt Rpt report RTC real time clock RTI relative to patient input RTN return RVS reverse R W read write S 12SL 12 simultaneous leads Revision A MAC 5500 resting ECG analysis system A 9 2020299 020 Appendix A Abbreviations Standard Abbreviations s S S
78. ed to system Power source problems can cause static discharge resetting problems and noise Revision A MAC 5500 resting ECG analysis system 5 7 2020299 020 Troubleshooting Diagnostic Tests Diagnostic Tests Introduction Verify that the MAC 5500 resting ECG analysis system operates properly by running the diagnostic tests These tests check the operation of the display screen speaker keyboard thermal writer battery and communication Detailed information displays on screen Loading the System Diagnostics 1 Select Main Menu on the Resting screen 2 Select More 3 Select System Setup 4 At the prompt type the word system the password set at the factory then press the Enter key If the password was not changed the System Setup menu appears If the menu does not appear use the master password If the system s unique password is inaccessible create one following the instructions in Substitute Master Password later in this section 5 When the System Setup menu displays hold down Shift and press F5 Shift F5 6 Type prod at the service password prompt 7 The System Diagnostics menu appears Substitute Master Password If you do not have access to the system s password you can create a master password as follows 1 At the prompt for the system password enter meimac A random 6 digit number displays on the screen For example 876743 2 Write the number down and create a new 6 d
79. en 9 999999 99 Revision A MAC 5500 resting ECG analysis system 3 15 2020299 020 Installation MAC 5500 ST Requirements and Configuration MAC 5500 Configuration Requirements At the Main Menu complete the following in the order shown below Select System Setup Enter System password Exercise Test Inputs Outputs Change Blood Pressure to Suntech 999 Ergoline Model Ergoline 900 Connection Requirements Use cable PN 2008110 001 to connect from the MAC 5500 port 1 to the Ergoline serial port Use cable PN 2008115 001 to connect from the MAC5500 ANA TTL port to the Ergoline QRS trigger input Device Configuration Requirements See Ergoline 900 Operator s Manual MAC 5500 Configuration Requirements At the Main Menu complete the following in the order shown below Select System Setup Enter System password Exercise Test Inputs Outputs Change Blood Pressure to Ergoline Ergometer 999 Compatible GE Medical Systems nformation Technologies Treadmills Analog Treadmills Model T2000 Connection Requirements Use cable PN 2007918 001 T2000 to connect from the MAC 5500 port 1 to the treadmill serial port Device Configuration Requirements None MAC 5500 Configuration Requirements Use the Edit Protocol application to set the protocol Test Type to Treadmill in MPH or Treadmill in Km H for protocols that will be used with this treadmill Connection Require
80. ent the BBus pull up resistors will actually pull the BBus lines low This can only occur with Moe since all other Stooges are powered by 3V M Moe is powered by 3V C instead Run ChkCurly Though the Curly is removed the firmware related to Curly is still present for backward compatibility Run ChkShemp If bit 4 of Port A is high we are Shemp At this point we are either Shemp or Larry Shemp has pull up resistors on Port A so bit 4 should be high Larry on the other hand has uses Port A to drive a makeshift DAC Since Port A is not being driven at the moment bit 4 will be pulled to low via the common DAC resistor R136 which is grounded Revision A MAC 5500 resting ECG analysis system 2 31 2020299 020 Equipment Overview Theory of Operation BBus Shemp Larry m We must be Larry At this point we have eliminated all other Stooges All three stooges Moe Larry and Shemp communicate with the ATMEL CPU via BBus connections BBus is a single wire half duplex serial connection that places minimal hardware requirements on the microcontroller while yielding respectable bit transfer rates 50KBps A common set of BBus commands allow the ATMEL CPU to access 128 bytes of RAM in each microcontroller This dual port access allows the ATMEL CPU to examine and modify internal variables in each controller while code is executing This ability is used to allow the unalterable HCO5 code to handle modest changes in hardware
81. ergent diluted in water 2 Wring the excess water from the cloth Do not drip water or any liquid on the equipment and avoid contact with open vents plugs or connectors 3 Dry the surfaces with a clean cloth or paper towel Interior Cleaning General Check for dust buildup on the surfaces of the interior circuit boards components and power supply Use commercially available compressed air to blow away the accumulated dust Follow the manufacturers directions 4 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Inspection and Cleaning Thermal Printhead Clean the thermal printhead every three months or more often with heavy use A build up of thermal paper coating on the printhead can cause light or uneven printing Use a solution containing alcohol on a nonwoven nonabrasive cloth such as Techni Cloth to wipe off the printhead Do not use paper toweling as it can scratch the printhead Thermal Printhead 35A Revision A MAC 5500 resting ECG analysis system 4 5 2020299 020 Maintenance Battery and Patient Cable Replacement Battery and Patient Cable Replacement Battery Replacement 1 Press the internal access button to open the unit 2 Slide the battery release button in the direction of the arrow and lift the battery out 36A 3 Install a new battery and close the unit Patient Cable Replacement 1 Press the internal access button to open the unit
82. esult in death or Serious injury WARNING Indicates a potential hazard or unsafe practice which if not avoided could result in death or serious injury CAUTION Indicates a potential hazard or unsafe practice which if not avoided could result in minor personal injury or product property damage NOTE Provides application tips or other useful information to assure that you get the most from your equipment 1 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Introduction Safety Messages Safety Messages Additional safety messages may be found throughout this manual that provide appropriate safe operation information DANGER Do not use in the presence of flammable anesthetics WARNINGS This is Class 1 equipment The mains plug must be connected to an appropriate power supply Operate the unit from its battery if the integrity of the protective earth conductor is in doubt CAUTIONS This equipment contains no serviceable parts Refer servicing to qualified service personnel U S Federal law restricts this device to the sale by or on the order of a physician Responsibility of the Manufacturer GE Medical Systems Information Technologies is responsible for the effects of safety reliability and performance only if Assembly operations extensions readjustments modifications or repairs are carried out by persons authorized by us The electrical installation of
83. frequency derived from Larry s resonator Larry processes motor position information on both edges of both encoder signals for a total of 64 loop correction cycles per rotation of the motor shaft This high angular sampling rate allows Larry to achieve accurate and smooth speed regulation down to zero speed Paper Jam Pull Detection Larry monitors the servo error variable to determine whether the servo loop is closed If the error variable saturates on for more than a predetermined time it is assumed that the paper drive torque has become excessive or the motor has stalled This condition is reported as a Paper Jam Error Similarly if the servo error variable saturates at off for more than a predetermined time it is assumed that the someone is pulling on the paper with a force that exceeds the paper drive system torque and as a result paper speed has been pulled out of regulation This condition is reported as a Paper Pull Error Cue Hole Sensor Cue and out of paper conditions are sensed via the thermal print head s integral optical cue sensor Larry monitors the cue sensor s logic output Cue Hole Detection Larry monitors the output of the cue sensor to detect the presence or absence of paper under the sensor and hence the absence or presence of cue holes Paper Tracking Fault Detection Larry monitors the cue sensor for abnormally long paper travel without encountering a cue hole This condition is reported as a Paper
84. g General Fault Isolation Visual Inspection A thorough visual inspection of the equipment can save time Small things disconnected cables foreign debris on circuit boards missing hardware loose components can frequently cause symptoms and equipment failures that may appear to be unrelated and difficult to track NOTE Take the time to make all the recommended visual checks before starting any detailed troubleshooting procedures Table 1 Visual Inspection List Area Look for the following problems 1 0 Connectors and Cables Fraying or other damage Bent prongs or pins Cracked housing Loose screws in plugs Fuses Type and rating Replace as necessary Interface Cables Excessive tension or wear Loose connection Strain reliefs out of place Circuit Boards Moisture dust or debris top and bottom Loose or missing components Burn damage or smell of over heated components Socketed components not firmly seated PCB not seated properly in edge connectors Solder problems cracks splashes on board incomplete feedthrough prior modifications or repairs Ground Wires Wiring Loose wires or ground strap connections Faulty wiring Wires pinched or in vulnerable position Mounting Hardware Loose or missing screws or other hardware especially fasteners used as connections to ground planes on PCBs Power Source Faulty wiring especially AC outlet Circuit not dedicat
85. he patient should remain motionless during the acquisition of a resting ECG Missing ACI TIPI Report ACI TIPI is disabled Enable ACI TIPI The selected report is without interpretation Select Interpretation for the report The ACI TIPI required information is not entered Make sure the age range gender and chest pain complaints are entered The patient was entered as pediatric Make sure you enter an age range less than 16 The original ECG was acquired in an electrocardiograph without the ACI TIPI option No BP from External Device Check setup If Suntech check protocol on Tango Check cables Serial and TTL Check TTL trigger Treadmill Ergometer Does Not Move m Check protocol m Check cables m Check input output settings m Check Emergency Stop switch 5 18 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting System Errors System Errors The following errors may occur while you are operating this system You may be required to perform some action If you perform the recommended actions and the condition still remains contact authorized service personnel See How to Reach Us to find out how to contact GE Medical Systems Information Technologies Problem Cause Solution px appears on the screen flashes intermittently SS appears on the screen A No battery is installed in the system The battery charge is low The writer
86. hypertensive Al A4 auxiliary leadwires AAMI American Association of Medical Instrumentation ABP ambulatory blood pressure ac AC alternating current ACLS Advanced Cardiac Life Support A D analog to digital Adj adjustable AG automotive glass Ah ampere hours AHA American Heart Association Al aluminum AllRam all RAM AllSec all sector AllTrk all track ALT alternate Alt Off alternate offset am AM acquisition module ante meridiem AM 1 acquisition module 1 AM 1M acquisition module 1 modified AM 2 acquisition module 2 AM 3 acquisition module 3 AM 4 acquisition module 4 amp ampere Ampl amplifier AMU ambulatory monitoring unit ANA analog ANLG analog AnsrTone answer tone A O Analog Output ASCII American Standard Code for Information Interchange ASSY assembly Attn attention AUG August AUST Australian AUSTRALN Australian Auto automatic AutoRhym automatic rhythm AUX auxiliary aVF augmented left leg lead avg average aVL augmented left arm lead aVR augmented right arm lead AWG American Wire Gage Revision A MAC 5500 resting ECG analysis system A 3 2020299 020 Appendix A Abbreviations Standard Abbreviations B Bd board baud BDGH binding head BetaB beta blockers BKSP backspace BLK black BLU blue Blvd boulevard BP blood pressure BPM beats per minute BRIT Britain BRN brown BSI British Standards Institute Btu British thermal unit C CalcBlk calcium blockers CAPOC Computer Assisted Practice of Cardiology CASE Computer
87. iagnostic Digitalis Digitoxin digoxin Digoxin Lanoxin dual in line package directory diuretics date of birth disk operating system diametral pitch double pole single throw dynamic RAM digital recording digital transmission desktop Dysopyramide E enable vector electrode site vector lead electrocardiogram Engineering Change Order Electrocardiograph Digital Information Center electrically erasable programmable ROM for example enhanced graphics adapter electromotive force electromagnetic interference English end of file Electronic Patient Information Chart electrically programmable logic device eraseable programmable read only memory electrostatic discharge et cetera Europe European Expanded fuse Farad female function keys through 5 facsimile Federal Communications Commission front end fillister head Revision A MAC 5500 resting ECG analysis system A 5 2020299 020 Appendix A Abbreviations Standard Abbreviations FLH flat head FLRAM flash RAM FR French FrntEnd front end FSK frequency shift keying ft foot feet Furosem Furosemide G g gram acceleration due to gravity GB Great Britain GERM German Germany GND ground digital ground dc common GRN green GRY gray H H high vector electrode site vector lead HDLC high level data link control Hex HEX hexagon hexadecimal HH hour HiRes high resolution Hr hour Hydral Hydralazine Hz Hertz cycles per secon
88. ic plane from one video frame to the next Since the LCD controller does not support multiple image planes it is necessary to pack two planes of image data into a single frame buffer On the software side during drawing this is done by bit masking operations that allow separate manipulation of two virtual pixels in each byte of frame buffer memory Each 8 bit byte holds a pair of pixels one from the static plane and one from the dynamic plane On the hardware side part of each frame buffer byte the static plane is played directly into the LCD after suitable color mapping The remainder of the byte the dynamic plane is stored in a 1 line temporal buffer before being displayed The amount of delay applied to the line buffer before merging it with the static image data determines its placement on the screen By gradually changing the delay the dynamic image can be made to scroll Color Lookup Table CLUT Generally the dynamic plane is filled with waveforms and perhaps a few characters of text The static plane often contains text messages icons buttons and graphics The greater variety of object types displayed in the static plane demands a wider range of colors For this reason each video data byte is split asymmetrically into five bits of static pixel data and three bits of dynamic pixel data This has come to be known as 5 3 format The 5 3 format provides a palette of 2 3 8 colors for dynamic objects and 245 1 81 colors for st
89. ient hardware implementation possible SDRAM Frame Buffer Controller The LCD obtains pixel data from a 1Mbyte region of a 32Mbyte 16 bit wide synchronous DRAM SDRAM The SDRAM buffer is shared by the display controller and the CPU allowing system software to directly manipulate screen pixels At power up SDRAMs must be configured for proper operation Properties such as RAS CAS latency and burst length are written into a control register in the SDRAM and an initial burst of refresh cycles are performed to prepare the memory array for operations The SDRAM controller does this all automatically at startup requiring no initialization by the CPU SDRAMs being dynamic require periodic refresh to maintain the contents of the memory array The SDRAM controller performs this refresh automatically between accesses All details of SDRAM bank management and page boundary crossing are managed automatically in the SDRAM controller In addition through the use of pipelining the SDRAM controller allows burst accesses to and from SDRAM at full memory speed All details of burst cycle management including setup and page boundary crossings are handled transparently by the SDRAM controller The SDRAM memory clock is derived from the CPU memory clock and is passed out of the FPGA and back in to allow one of the FPGA s on board DLL s to zero out all internal FPGA delays This delay compensation allows the SDRAM controller to operate reliably at
90. igit number by adding alternating digits from the random number as follows Add first and third digits second and fourth digits third and fifth digits fourth and sixth digits fifth and first digits and sixth and second digits 9999 Disregard the 10s column when adding the digits The new number from the example above would be 440020 3 Enterthe new number then press the Enter key The System Setup menu displays This process only works once so you should reprogram the password permanently 5 8 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Diagnostic Tests 4 Go to the Basic System menu 5 Select Miscellaneous Setup 6 Select the System password line and type the new password in the space 7 Press the Enter key 8 Select Save Setup from the System Setup menu 9 Select To system System Diagnostics Main Menu Display Tests Pixel Verification Test Grey Scale Test Patterns Use the arrow pad control to highlight a menu item then press the Enter key to select it The tests and test menus contain on line prompts and or instructions 4 Display Tests Speaker Test Keyboard Test Writer Tests Battery Tests Communication Tests Acq Module Tests Analog I O Tests Floppy Drive Tests Internal Memory Tests SD Card Tests Exit System Diagnostics reboots the system 9 9999999999 Run the screen Display Tests to verify that all the screen pixels are wor
91. ing Down The next time the system is powered on the software will be updated 8 Ifthe boot code needs updating a message similar to the one shown below 1s displayed Current Boot Version New Boot Version Press Enter to start Installation If the message shown in step 8 appears press Enter The messages below are displayed Programming Primary Boot Programming Over System is Shutting Down 9 Verify the new software version on the startup screen Revision A MAC 5500 resting ECG analysis system 4 17 2020299 020 Maintenance Disassembly Guidelines Service Only Setups Restore System Setups jm B vies Ob ry Spo chos des From the Main Menu select System Setup Press Shift F2 at the System Setup menu Enter the service password and press Enter The Service Only Setup window is displayed Service Only Setup Serial number Update Primary Boot Print head resistance Keyboard Heturn Enter the serial number of the system NOTE This is the number which was used when the option codes for this system were generated The number entered here must match the serial number on the label of the system Select verify that No is selected for Update Primary Boot Enter the Print head resistance This number can be found on the print head label Select the appropriate language 1n the Keyboard menu Select Return Power up the cart Fr
92. interpretation to print on the ECG put the number of copies you want in the without column Click view report type to see the examples of the report formats Press the esc key until you return to System Setup Select Save Setup Select To System You can select Main Menu to exit System Setup What is the difference between the Hi Res and Phi Res functions Hi Res looks at the entire complex whereas Phi Res focuses on the P wave Can you edit the interpretation at the MAC 5500 and then transmit the edited record to the MUSE system as an unconfirmed record If you edit demographic information only the record is still transmitted to the MUSE system as an unconfirmed record However if you edit the interpretation the data will not be saved unless the record is confirmed at the MAC 5500 The record is transmitted to the MUSE system as a confirmed record as well 5 22 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Frequently Asked Questions Entering Patient Data Transmission Q A Do I have to enter all the Information I see on the Patient Data screen In System Setup gt Basic System gt Patient Questions you can require that the patient identification number or medical record number be entered It is not a requirement to enter any other data However we recommend that you enter the patient name and identification number at the least If you are transmitting to the
93. ion on Energy Star compliant monitors Blank Unlike LC displays CRT s emit light from more than just their active display surface The electron beam is visible even during retrace and precautions must be taken to ensure that the guns are off in non active areas of the display To ensure black borders on external monitors and reset the DC restore clamps in the video output buffers The CLUT video passes through a gating register before leaving the FPGA This allows the LCD DE display enable signal to force the guns to a blanking level during inactive portions of the display frame Interrupt Controller ATMEL AT91RM9200 supports one external fast interrupt input FIQ and seven external interrupt inputs In addition all the GPIO lines can act as an interrupt inputs All the dedicated external interrupt inputs are multiplexed with GPIO ports The FPGA interrupt logic combines the interrupts form System Timer Acquisition interface BBUS interface Thermal printhead interface and LCD controller to FIQ and Slow Interrupt The FIQ and Slow Interrupt from FPGA Interrupt controller are fed to processor FIQ and IRQO respectively For more detail on the operation of the interrupt mask status registers see the source file hardware h 2 22 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation System Interrupt Timer A 1KHz timer generates system interrupts which may be routed to FIQ
94. k part number is displayed on screen Alignment test values will be displayed 5 16 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Diagnostic Tests Internal Memory Tests SD Card Tests This test checks the internal storage memory of the unit 1 js ipeo Ne Select Internal Memory Tests from the System Diagnostics Main Menu The number of bad blocks and the amount of free memory displays Press any key to continue A prompt appears asking Do you want to format Internal Memory Press F to format and any other key to escape NOTE Do not format the internal storage memory if it contains data which has not yet been transferred Insert SD card which is not write protected Select SD Card Tests If test fails replace SD card and repeat test If test still fails CPU board may need to be replaced NOTE Do not format the SD card if it contains data which has not yet been transferred Revision A MAC 5500 resting ECG analysis system 2020299 020 5 17 Troubleshooting Equipment Problems Equipment Problems ECG Data Noise If the acquired ECG data displays unacceptable noise levels Verify proper electrode placement Verify proper electrode application Perspiration and dead skin must be removed from the electrode site Check for defective or out of date electrodes Check for defective broken or disconnected leadwires Check the patient s position T
95. king and that the brightness and contrast samples appear to be within normal range There are no screen display adjustments The screen Display Tests are as follows Use the arrow pad control to move the bar across the screen and look for any missing pixels on the display Press the F1 key to turn on all of the pixels simultaneously Press the Enter key to exit the test The first test pattern used in manufacturing to verify the screen intensity shows two squares one bright and one dim Press any key to activate the next display Revision A MAC 5500 resting ECG analysis system 5 9 2020299 020 Troubleshooting Diagnostic Tests Speaker Test Keyboard Test The second test pattern shows the 32 color text palette Various gray scale patterns appear if the system does not have the color option enabled Check for problems with the overall pattern If the system does not have the color option various grey scale patterns display Press any key to exit the test Use the arrow pad to select Loud or Soft Press the Enter key to produce a loud or soft tone The tone level difference is minimal If tone is not audible the main CPU board may need replacement Speaker is part of CPU board Highlight Return and press the Enter key to return to the System Diagnostics menu Press each key and verify that the key is highlighted on the screen and also displayed at the top of the screen It is normal for a dim background i
96. l number for identification The serial number is formatted as shown in Serial Number Format on page 1 10 NOTE The examples shown are representative only Your product label may differ Revision A MAC 5500 resting ECG analysis system 1 9 2020299 020 Introduction Service Information Serial Number Format HHH HH 4 HHHH HH ro Table 2 Serial Number Format A product code B Year manufactured 00 99 00 2000 01 2001 02 2002 and so on Fiscal week manufactured Production sequence number Manufacturing site nm mMm OT O Miscellaneous characteristic 1 This manual applies to MAC 5500 with product code SCD Label Format p n lt Product p n gt lt Product Code Desc gt SN lt Serial Number gt GE MEDICAL SYSTEMS INFORMATION TECHNOLOGIES IN 8200 W TOWER AVE MILWAUKEE WISCONSIN USA Table 3 Equipment Identification Label A Date of manufacture in YYYY MM format B Partnumber of product C Product code description D Serial number described above E Manufacturing site 1 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 2 Equipment Overview evision MAC 5500 resting ECG analysis system 2020299 020 For your notes 2 2 MAC 5500 resting ECG analysis system 2020299 020 Revision A Equipment Overview General Description General Description The MAC 5500 resting ECG ana
97. leakage to ground To be tested power connector on back of tester may not be labeled on some testers Tester Tester pu DM ower Polarity UUT P I Norm Line cord power a Line cord I I Neutral I o l Unit A under z gt Neutral test UUT Gnd i Rvs i l Gnd 1 I I I I i 1K I Meter f 4 Probe to l I connectors A j exposed chassis M ee ee ee es N m y 50A Revision A MAC 5500 resting ECG analysis system 4 27 2020299 020 Maintenance Domestic Electrical Safety Tests Test 3 Patient cable leakage to ground To be tested power connector on back of tester may not be labeled on some testers Tester A 7 power Tester Polarity cord Norm Line T Line Line Neutral r i 9 l Neutral I Gnd I Rys LY I Gnd I I I I Meter i connectors gt Patient cable A T cable connectors 51A Test 4 Patient cable leakage into patient Leads from 120 VAC During this test line voltage is applied to the patient cable connectors To prevent erroneous readings do not allow the leadwires to contact conductive materials such as metal handles and do not place the leadwires on the floor To be tested power connector on back of tester may not be labeled on some testers Tester Tester no Ty power p ostor Polarity I UUT T cord Norm power ine e Line cord Neutral 1 9
98. ley on its side 2 Locate the slot under the arrow on the bearing dust cap and using a small blade screwdriver pry the cap from the caster to be removed 54A 55A 3 Using an Allen wrench remove the wheel shaft and wheel from the caster 56A 4 Using an Allen wrench remove the bolt holding the caster to the trolley v P d 57A Revision A MAC 5500 resting ECG analysis system 4 23 2020299 020 Maintenance Disassembly Guidelines Reassembly 1 Install the replacement caster on the trolley NOTE Ensure that the pins align with the holes on the fixed caster before fastening to the trolley 57A 58A 2 Install the wheel and attach with the wheel bearing shaft and nut 56A 59A 4 Set trolley upright and push to check alignment and free movement of casters 5 Replace MAC 5500 4 24 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Domestic Electrical Safety Tests Domestic Electrical Safety Tests AC Line Voltage Test This test verifies that the domestic wall outlet supplying power to the equipment is properly wired For international wiring tests refer to the internal standards agencies of that particular country 120 VAC 50 60 Hz Use a digital voltmeter to check the voltages of the 120 volt AC wall outlet dedicated circuit recommended If the measurements are significantly out of range have a qualified electrician repair the outlet The v
99. lity on Each Line 20 channel Peripheral Data Controller DMA Multimedia Card Interface MCI Automatic Protocol Control and Fast Automatic Data Transfers MMC and SD Memory Card compliant Supports Up to Two SD Memory Cards Three Synchronous Serial Controllers SSC Independent Clock and Frame Sync Signals for Each Receiver and Transmitter I 2 S Analog Interface Support Time Division Multiplex Support High speed Continuous Data Stream Capabilities with 32 bit Data Transfer 2 8 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Four Universal Synchronous Asynchronous Receiver Transmitters USART Support for ISO7816 TO T1 Smart Card Hardware and Software Handshaking RS485 Support IrDA Up To 115 Kbps Full Modem Control Lines on USART1 Master Slave Serial Peripheral Interface SPI 8 to 16 bit Programmable Data Length 4 External Peripheral Chip Selects Two 3 channel 16 bit Timer Counters TC Three External Clock Inputs Two Multi purpose I O Pins per Channel Double PWM Generation Capture Waveform Mode Up Down Capability m FPGA Containing XBus Controller LCD Controller with SDRAM Frame Buffer Video Waveform Scroller Interrupt Controller System Interrupt Generator Acquisition Module Interface Thermal Printhead Interface Serial EEPROM Interface BBus Controller Four PWM Analog Outputs Beep Generator PC Card Interface 9000
100. low further refinement of the board identity Resistors R98 and R99 through R129 are used to program the board ID Board ID Code Versions of the 801212 CPU Board assembly 000h 001 002 and 003 001h 004 not used and 005 002h 006 this board To reduce loading on the high speed processor address and data busses a slow speed byte bus is provided for peripheral interface The Super I O controller and SmartMedia card are both located on this bus Unlike the 3 3V only main data address busses XBus is compatible with both 5V and 3 3V logic To maintain software compatibility with previous board versions the low order address byte is not used by XBus Starting XBus addressing with A8 also produces Super I O addresses that easily map to their standard PC equivalents simply append 0x00 to a datasheet Super T O address offset to get a MAC 5500 Super I O address offset LCD Controller with SDRAM Frame Buffer Continuing problems with LCD controller part obsolescence have made implementation of a controller design in the FPGA attractive The MAC 5500 GUI software does not depend on sophisticated video functionality so an FPGA implementation of a suitable display controller can be reasonably compact By implementing the controller in the FPGA using the VHDL hardware description language obsolescence is avoided and future upgrades are easily implemented The LCD controller is comprised of these functional blocks
101. lse full reading on the gas gauge The battery and ambient thermistors are the same type and value to ensure reasonable tracking Capacitors C155 and C156 filter noise from the temperature sense lines Thermistor Bias Switch To reduce quiescent power consumption when the system is turned off a switch disables bias current to the battery and ambient thermistors Q104 under control of MOE switches the low side of the thermistor bias networks 2 36 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Charge Light Moe provides power to the amber charge light in the power supply compartment Moe communicates the current battery charger state via this light Four conditions may be indicated 1 Battery charged light is off 2 Battery needs charge light blinks twice per second 3 Battery is critically low light blinks once per second 4 Battery is charging light on continuously NOTE If the battery is so completely discharged that the MAX782 VL output 5V falls out of regulation the charge light will remain off The charge LED is contained in the power supply compartment and is disconnected from the CPU board when the cover is open When the cover is closed electrical connections are re established through the self aligning connector As the connections are made in random order there is a possibility that the VPS and XChargeLED drive lines can connect before
102. lysis system is a 15 lead 12 channel system with a 10 4 inch 264 mm diagonal display active patient cable battery operation and late potential electrocardiography There are also options for communication capabilities Front View 115B Name Description A display screen View the waveform and text data B modem port Connect the telephone cable here C LAN port Connect to the LAN here m The green LED right of this port indicates that power is Supplied to the communication card from the Ethernet link m The amber LED left of this port flashes to indicate network traffic D keyboard Press the keyboard keys to control the system or to enter data Revision A MAC 5500 resting ECG analysis system 2 3 2020299 020 Equipment Overview General Description Back View 117A Name Description A back panel connectors Connect peripheral devices here B secure data card slot Insert secure data card for external storage here C green AC power light Indicates the system is connected to AC power D amber battery light Indicates the battery is recharging E internal access button Press to open the system to change paper or the battery 2 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Connector Identification Connector Identification WARNING LEAKAGE CURRENT Keep leakage current within acceptable
103. m Video Timing Generator See Video Timing on page 2 17 SDRAM Frame Buffer Controller See SDRAM Frame Buffer Controller on page 2 17 2 16 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation m Format pack unpack logic See Format pack unpack logic on page 2 17 Line buffer See Line Buffer on page 2 19 Fill Engine See Fill Engine on page 2 19 Main State Machine See Main State Machine on page 2 20 Interrupt management See Interrupt Management on page 2 21 Video Timing The LCD controller generates video pixel and line timing from a global 48Mhz clock inside the FPGA The timing generator consists of one counter for timing pixels within a line including generation of horizontal sync horizontal front and back porches and LCD data enable timing and another for timing lines with a frame including generation of vertical sync vertical front and back porches and generation of Line FIFO fill requests In addition the timing generator increments a memory address register by the line pitch 640 at the beginning of each video line so the Line FIFO knows where to get the next line of pixels The controller produces fixed timing for a 640x480 LCD and requires no initialization to produce that timing Support for future higher resolution displays can be obtained by modifying the source code for the controller itself providing the most effic
104. mage to remain on the screen when you select the next key The numeric value that displays at the top of the screen is the scan code representation of the pressed key NOTE The display shows keys in the upper part of the screen that are only available with the MAC 5500 ST keyboard m Check both of the Shift keys by pressing each in combination with a letter to display a capital letter m Press the center of arrow pad control and verify that the word IN displays on screen Press arrows to change the displayed arrow position A beep sounds with each arrow press m Press the Shift key and the F6 key to exit the test 5 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Diagnostic Tests Writer Tests Run the writer tests to check the motor speed control paper speed paper tracking paper cueing and print head quality During the tests make the following general checks m The first character printed should not be distorted This checks start up speed The writer should not skew or crush either edge of the paper The large triangles and diagonal lines printed across the pages should be straight and uniform without curves or wavering m The perforations should align with the tear bar on the door after cueing Paper travel should be smooth C Scan Tests 1 2 amp 3 These tests are combinations of test pattern I and the roller test They are used by the writer vendor 50 mm s Test Pattern
105. me I O functions out into small processors relieves the ATMEL CPU of burdensome real time chores and moves the control hardware closer to the controlled devices potentially reducing EMI Localizing control also promotes reuse in future designs as the functions are self contained and reasonably portable Originally there were four Stooges Since the boot loading and FPGA configuration is handled by ATMEL CPU the Curly was removed in 006 board Although there are three of these little fellows in the MAC 5500 each performing a different function there is only one firmware image By merging the code from each of the three functions into a single ROM image cost and confusion are reduced It is impossible to place a processor in the wrong spot on the board and a single pile of paperwork supports all of the MAC 5500 s 68HC05 production volume More detailed information may be found in the source code As each controller is released from reset it executes a common WhoAml routine to determine its identity on the board Each controller s environment is uniquely and easily identified with a few port pin tests Once the identity is discovered the code jumps to the appropriate entry point in the unified image and microcontroller assumes the desired personality The flow for the WhoAmI routine is as follows m Run ChkMoe Basically if the BBus PD5 is low we are Moe Since Moe controls the power supply for 3V M which is off at the mom
106. ments There are no cables available from GE Medical Systems Information Technologies to interface to analog treadmills The customer is responsible for making the appropriate cable Speed and grade signals for controlling analog treadmills are available on pins 2 Slow Analog Output and 8 Fast Analog Output of the ANA TTL port Pins 1 4 and 5 are tied to ground Device Configuration Requirements None MAC5500 Configuration Requirements Use the Edit Protocol application to set the protocol Test Type to Analog Treadmill in MPH 3 16 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation MAC 5500 ST Requirements and Configuration Bicycle Ergometers or Analog Treadmill in Km H for protocols that will be used with this treadmill Configure pin 2 on the ANA TTL port by selecting the following System Setup Exercise Test Inputs Outputs and set Slow Analog Output to Workload Configure pin 8 on the ANA TTL port by selecting the following System Setup Exercise Test Inputs Outputs and Set Fast Analog Output to Workload Ergoline 800 900 Lode Ergometer Connection Requirements Use cable PN 2008109 001 Ergoline 800 PN 2008114 001 Ergoline 900 or PN 2007981 001 Lode Ergometer to connect from the MAC 5500 ANA TTL port to the ergometer analog control port NOTE For any other ergometer the customer is responsible for making the appropriate cable
107. nal before entering comparator U6 When the current exceeds the comparator threshold the open drain output of the comparator is used to remove the gate drive from Q103 which will in turn switch off the com port power The function of the integrator is two fold First it allows high surge currents to exist for a short time Secondly the integrator has a much longer recovery time due to diode CR103 which effectively changes the integration resistor from 100KQ to 1MegOQ This long recovery time results in a low duty cycle when the load is a short circuit The low duty cycle prevents FET Q2 from overheating when driving a short circuit Since the MAC 3500 contains an internal KISS pump separate power control is necessary for this CPU board design to support that product An identical Switch Current Limiter circuit as described above for the COMM Port Power was added exclusively for the KISS pump Revision A MAC 5500 resting ECG analysis system 2 29 2020299 020 Equipment Overview Theory of Operation Thermal Printhead Power Pixel Test Hardware The FPGA provides all the interface logic for the thermal print head A MOSFET switch controls power A charge pump voltage doubler driven by the FPGA provides that switch s gate drive Additional circuitry currently unsupported is supplied to allow the measurement of individual dot resistance for automatic strobe width compensation and blown dot detection A switchable constant current s
108. nalysis system 2 25 2020299 020 Equipment Overview Theory of Operation Beep Generator PC Card Logic SDRAM NAND Flash problem exists as this is allowed with VHC logic The PWM output signals are then low pass filtered R187 C186 etc before being passed to the output amplifiers The ECG output channel amplifier injects an offset current derived from REF2V5 to achieve bipolar operation The DC outputs operate in unipolar fashion eliminating the vexing MAX 1 offset problems No zero calibration is required for the DC outputs Since the ECG output is an AC signal no offset adjust is required there either The output amplifiers provide additional low pass filtering R180 C178 etc ESD protection and additional PWM carrier filtering is provided by 0 1uF filter capacitors To prevent amplifier oscillation blocking resistors are placed between the amplifier outputs and the filter capacitors A simple tone generator with two volume levels provides system beeps and key clicks Frequencies of 250Hz 500Hz and 1KHz are provided at both low and high volume The logic level output signal drives LS1 through an open collector transistor driver Q100 Full volume is achieved by driving the fundamental beep tone directly to the speaker Half volume is achieved by gating the speaker signal with a 24MHz square wave reducing the amplitude by 5096 The LS1 is also used by the communication board for modem sound The modem speaker signal from th
109. nd Patient Cable Replacement enn n nn nn nnn 4 6 Battery Replacement italian etd re CR e oec 4 6 Patient Cable Replacement 4 6 Disassembly Guidelines seeenn nnn nns 4 7 Preliminary HS AA sie n c nae eh las 4 7 Trolley Disassembly 2 o d Ceca e orco e Fnac 4 7 Type S Trolley Disassembly sssssssssssse e 4 8 Power SUPDIV tans scan une Rp Adeo Me o hoe ns 4 8 R emoValis ssi wad nesta etic tette toes aote A oq ed Pt sae e t 4 8 Reassembly wicket s ent pocius ette paced ts 4 9 TOP COVER orana aa ett tita ease eee tote rato dan ii ani 4 10 Removals PEE 4 10 Reasselribly ii e eei et oe WEE icd 4 11 Display Keyboard Assembly isses 4 12 Removallz 3 2 1 p debate ht oae brc fite o b ede wiped 4 12 Display Keyboard Reassembly cee cece eet teens 4 13 Revision A MAC 5500 resting ECG analysis system iii 2020299 020 R dssembly e RERO hed EDU Hb pes 4 13 MainiCPU BOatd oc aa og enpert eb reees ose en Cube ie dd 4 14 Removal of CPU Board ccc cc 4 14 Reassembly of CPU Board 4 14 SLICE I has asco nana 4 16 Service Only Setups 1 4 18 Restore System Setups 0 cece teens 4 18 Restore Options uei e Moan ek iad dotie Meta unde dett 4 19 Disable Options cere bp borras rd dica Ee 4 19 Printhead Replacement ccc ee cece eect tees ne 4 20 REMOVALS iiem ra redact 4 20 R asSembly uds 4 20 COMM Board Replacement ccc cc cece cee rr 4 21 Writer Roller Carriage Assembl
110. nd or the system configuration must meet the requirements of the IEC 60601 1 1 medical electrical systems standard The use of ACCESSORY equipment not complying with the equivalent safety requirements of this equipment may lead to a reduced level of safety of the resulting system Consideration relating to the choice shall include use of the accessory in the PATIENT VICINITY and evidence that the safety certification of the ACCESSORY has been performed in accordance to the appropriate IEC 60601 1 and or IEC 60601 1 1 harmonized national standard 1 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Introduction Equipment Symbols Equipment Symbols e Ll l R gt Dto y MEDICAL EQUIPMENT The following symbols appear on the equipment Type B equipment Type BF equipment external defibrillator protected Alternating current When illuminated the green LED next to this symbol indicates AC power is connected Equipotential Charge the battery The flashing amber LED nextto this symbol indicates you must connect the system to AC power to re charge the battery DO NOT throw the battery into the garbage Recycle the battery Consult accompanying documents Classified with respect to electric shock fire mechanical and other specified hazards only in accordance with UL 2601 1 CAN CSA C22 2 No 601 1 CAN CSA C22 2 601 2 25 ulzeort gawcsasor EN 60601 2 25 EN 6060
111. ntroduction The troubleshooting information in this chapter helps you narrow service problems to one of the replaceable assemblies These assemblies illustrated in the block diagram are discussed in more detail in the individual assembly chapters along with replacement procedures Assembly Block Diagram Isolation Barrier Patient Acquisition Module Display A PS2 El com 1 com2 CPU Board Analog I O 3 E Card IR 4 Speaker ad Writer Thermal Printhead AC FR Mot Supply inlet ET Cue Sensor Backlight Keyboard D T O qp qp qp Equipotential Y 121A Revision A MAC 5500 resting ECG analysis system 5 3 2020299 020 Troubleshooting General Fault Isolation General Fault Isolation Power up Self test See the MAC 5500 Operator s Manual Chapter 2 Equipment Overview Getting Started to verify operation On power up the system automatically runs an internal self test If all circuits test good the start up screen displays If the equipment is not working properly ask yourself the following questions m Is the unit turned on m Have there been any changes in the use location or environment of the equipment that could cause the failure m Has the equipment hardware or software been modified since last use m Is operator error the cause of the problem Try to repeat the scenario exactly and compare that to the proper operation of the eq
112. oftware update is in progress But it can not provide the completion status Refer the table below for the status messages from LEDs DS1 and DS2 during primary boot software update DS1 Red DS2 Green Status Off Flashing No SD card detected for software updated off On Copying image files from SD card to SDRAM Off Off Erasing and or formatting the NAND Flash Applicable only during the software update process 2 14 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation DS1 Red DS2 Green Status On Off Programming the NAND Flash Flashing Flashing Successful completion of programming Flashing Off Error Could program all the image files But error in programming the status page Z0 On On Error Could not program all the image files as well as the status page Z0 On Flashing Error Could not program all the image files But the status page Z0 updated successfully A copy of primary boot program pages with ID Bn where n is the 3 bit PCB ID code 1 8 is kept in NAND flash This is updated whenever software update happens For 006 board the FPGA image and Primary boot code image ID s are X3 and B3 respectively The primary boot program can do a forceful software update even if a valid program is present in the NAND Flash by using a special SD Card which has a file update com in the root directory The service menu
113. oltage measurements should be as follows 1 120 VAC 10 VAC between the line contact and neutral and between the line contact and ground 2 Less than 3 VAC between neutral and ground NEUTRAL GROUND ATA 240 VAC 50 60 Hz Use a digital voltmeter set to measure at least 300 VAC to check the voltages of the NEMA 6 20R AC wall outlet dedicated circuit recommended If the measurements are significantly out of range have a qualified electrician repair the outlet The voltage measurements should be as follows 1 120 VAC 10 VAC between either hot contact and ground 2 210 to 230 VAC between the two hot contacts N GROUND TA Revision A MAC 5500 resting ECG analysis system 4 25 2020299 020 Maintenance Domestic Electrical Safety Tests Leakage Tests The leakage tests are safety tests to ensure that the equipment poses no electrical health hazards Use the table below to determine which tests apply to the unit under test and the maximum allowable leakage currents For international leakage limits refer to the internal standards agencies of that particular country If the unit under test fails the leakage tests do not allow the customer to use the equipment Call Tech Support for assistance See the How to Reach Us page in the front of the manual We recommend that you perform these tests Before applying power for the first time Every 6 months as part of routine mainten
114. om the Main Menu select System Setup Enter the System Password and press Enter Select Restore Setup from the System Setup menu Select From SD Card from the Restore Setup menu 4 18 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines Restore Options Using the option activation codes for the system restore the options which had been installed on the board which was removed These options are printed on a label located on the bottom of the paper tray NOTE Use the activator codes shown on the label on your system The activator codes shown in the figure below are examples only Serial SCD04101589A Opcode Activator Code ST12 ST15 HRES PRES EDPR MODM FAXM DIAG RQRY TIPI GN12 COLR MAST WIFI BCRD MGRD CTDG ELAN 066062764546 541271375573 757166175301 775576210234 570051503711 342671376664 655447326375 422733253021 573705777537 562707774425 645745743355 755316426645 624602777473 717437704277 354632773353 226526500653 736277035677 776722553262 122A Power on the cart Within the System Setup function select Basic System Select Option Activation to activate options Type the 12 digit option activation code and press the Enter key QU ae pu Se EY Repeat the previous step for each option to be activated on the new system 6 Highlight Return and press Enter to return to the Basic S
115. on Module Transceiver Power Switch Transceiver MAC 5500 acquires ECG data with a new generation CAM acquisition module The FPGA provides the interface logic Clocks and commands are transmitted to the acquisition module on a balanced RS485 line Data is received similarly Power to the acquisition module is provided by a software controlled linear regulator To reduce EMI and susceptibility to noise the acquisition module link is implemented using RS 485 differential signaling An RS485 interface device provides the single ended to differential conversion in both directions Ferrite beads capacitors and resistors are used to reduce EMI on both sides of the transceiver 2 28 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation Acquisition Power Regulator Switch To reduce standby power consumption acquisition module power is switchable To protect the acquisition module from temporary brownouts on the main 12V supply power is obtained from a parasitic winding on the main 5V regulator This voltage is not well regulated so a linear regulator U16 is used to provide regulation This regulator also sports an enable input which is used to disable power to the acquisition module when not in use The regulator also has build in current limit and over temperature shutdown for protection COMM Port Power Switch Current Limiter KISS Power Power for external peripherals such
116. or this product for changes or additions to this list For Technical Support parts reference see pn 2026609 001 MAC 5500 Assembly Field Replaceable Units Item Part Number Battery Assembly 900770 001 Power Supply Assembly 421117 001 Keyboard Assembly 421115 XXX PCB Comm Board LAN internal modem 2022332 001 Display Assembly 2019106 001 Top Cover See NOTE Label Top Cover See NOTE NOTE Top Cover amp Label must be ordered together 2017413 001 2008167 001 Printhead 422397 001 Writer Assembly 421108 006 Roller Assembly 422396 006 Writer Release Button 2005920 001 Leaf Spring 417565 001 Gas Cylinder 416015 001 Battery LED Circuit Board 801222 001 MAC 5000 Country Modem PTO Option Class MAC5000 MODEM Country S pecific external modem 2005264 0XX MAC 5000 CAM14 PTO Option Class MAC5000_CAM14 Kit CAM14 Resting ECG W AHA Adapter 901142 001 Kit CAM14 Resting ECG W IEC Adapter 901142 002 MAC5000 Keyboard PTO Option Class MAC5000 KEYBRDS 6 4 MAC 5500 resting ECG analysis system 2020299 020 Revision A Parts List Field Replaceable Units Field Replaceable Units Continued Item Part Number Keyboard Assembly Resting English 421115 101 Keyboard Assembly Stress English 421115 201 Keyboard Assembly Resting German 42
117. ource 6mA applies a test current to the TPH power bus Larry then measures the TPH power bus voltage one of the four analog inputs he continuously monitors By loading a single black dot into the print head it is possible to measure its resistance A typical TPH has an average dot resistance of 6500 Presuming negligible driver leakage current a single enabled dot would drop 3 9V While there are mitigating influences off pixel driver leakage current and on pixel driver saturation voltage that might make accurate pixel resistance measurements difficult it is certainly possible to differentiate pixels of nominal resistance from those that are blown open Super I O Peripheral Controller A PC standard Super I O peripheral controller provides two serial channels one IrDA compatible and a clock calendar RS 232 Serial Ports One Dual Mode RS 232 IrDA Four serial ports are provided on two back panel Mini DIN 8 pin connectors The Super I O device provides two serial ports COM1 and COM2 and two more COM3 and COM4 are provided by the ATMEL CPU The COM2 serial port and modem handshake lines are found in the COM2 connector COM1 COM3 and COMA serial ports use pins in the COM1 connector The COM2 serial port of the Super I O device also supports the IrDA interface The COM1 serial port from Super I O is multiplexed with serial debug port of ATMEL The multiplexer select pins are controller by the jumper W2 setting Other than the above
118. placement 4 23 how to it d B 4 format a secure data card 5 20 MARE SRG l internal access button 2 4 K keyboard 2 3 L LAN port 2 3 list of abbreviations A 3 location number 5 21 M Modem port 2 3 Revision A MAC 5500 resting ECG analysis system Index 3 2020299 020 Index Index 4 MAC 5500 resting ECG analysis system Revision A 2020299 020 GE Medical Systems Information Technologies gemedical com World Headquarters GE Medical Systems Information Technologies Inc 8200 West Tower Avenue Milwaukee WI 53223 USA Tel 1414 355 5000 1 800 558 5120 US only Fax 1 414 355 3790 European Representative GE Medical Systems Information Technologies GmbH Munzinger StraBe 3 5 D 79111 Freiburg Germany Tel 49 761 45 43 0 Fax 49 761 45 43 233 Asia Headquarters GE Medical Systems Information Technologies Asia GE China Co Ltd 24th Floor Shanghai MAXDO Center 8 Xing Yi Road Hong Qiao Development Zone Shanghai 200336 P R China Tel 86 21 5257 4650 Fax 86 21 5208 2008
119. ption Quantization error limits the ability to measure the small current that flows when the system is off To compensate for this Moe presumes a small constant quiescent current flow from the battery This flow serves to drain the gauge at a rate estimated to mimic the self discharge and system quiescent current draws Current monitor gain is set by R128 and is nominally 1 8A V for a full scale 3 3V current of 6Amps A low pass filter R129 and C134 provides filtering to remove switching noise from the signal Revision A MAC 5500 resting ECG analysis system 2 37 2020299 020 Equipment Overview Theory of Operation For your notes 2 38 MAC 5500 resting ECG analysis system Revision A 2020299 020 3 Installation Revision A MAC 5500 resting ECG analysis system 2020299 020 3 1 For your notes 3 2 MAC 5500 resting ECG analysis system 2020299 020 Revision A Installation P reparation for Use Preparation for Use General Shown below is a completely assembled optional MAC 5500 Trolley Use this picture for reference when installing trolley options Acquisition Module MAC 5500 Arm and Holder 5 Front Cover Trolley Seria Number Swivel E Locking Casters Casters 13A NOTE Because the optional Trolley is made by another vendor for GE Medical Systems Information Technologies the serial number format is different from that shown in Chapter 1 Revision A MAC 5500 resting E
120. put Output Signals Acquisition Module J 14 Pin No Signal 1 Power 2 Ground 3 TX RS485 4 TX RS 485 5 RX RS485 6 RX RS 485 7 NC 8 NC 9 NC 10 NC 5 32 MAC 5500 resting ECG analysis system 2020299 020 Revision A O Parts List Revision A MAC 5500 resting ECG analysis system 2020299 020 6 1 For your notes 6 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Parts List Ordering Parts Ordering Parts General Information The FRU parts lists in this chapter supply enough detail for you to order parts for the assemblies considered field serviceable To order parts contact Service Parts at the address or telephone number on the How to Reach Us page provided at the beginning of this manual Revision A MAC 5500 resting ECG analysis system 6 3 2020299 020 Parts List Field Replaceable Units Field Replaceable Units The following items may not be assigned separate manufacturing part numbers because they are normally part of a larger assembly Since they are considered field replaceable units FRUs they have specific service part numbers so they can be ordered and replaced by service technicians Contact Tech Support for FRU information for assemblies used on previous configurations NOTE Verify part numbers before ordering service parts field replaceable units See the tech memo series f
121. r assembly following the procedures in Top Cover on page 4 10 3 Remove the display keyboard assembly following the procedures in Display Keyboard Assembly on page 4 12 4 Disconnect all remaining cable connections to the main PCB These include cables to the following power supply printhead battery connect PCB acquisition module cable 5 Remove the COMM board 6 With a TORX driver remove the mounting screws holding the main PCB in place They are located around the outside edges of the main PCB Set screws aside for mounting new board 7 Remove the harness cable 8 Lift the main PCB from the unit Reassembly of CPU Board 1 Insert the new CPU board in place and mount using the screws set aside during disassembly 2 Reassemble the top cover and display keyboard assemblies by reversing the steps for removal 4 14 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines 3 Insert rear bezel into slot on back of MAC 5500 assembly as shown below 5 With the new bezel in place replace the top cover by reversing the steps described previously 6 Replace the battery and proceed with software serial number and system setups as described in the following sections Revision A MAC 5500 resting ECG analysis system 4 15 2020299 020 Maintenance Disassembly Guidelines Software After replacing the 006 board you need to install
122. r the display keyboard assembly in place Slide tabs into their mounting slots and set the display keyboard assembly in place Connect the three cables from the display keyboard assembly to the main PCB Be sure to lift the locks up prior to attempting to insert the cables into the connectors Slide the display hinge metal rod to the right until it locks into the right hinge base Replace the hinge bracket with the two TORX screws removed earlier Replace the screw and display ground at the left of the hinge rod Replace the two TORX mounting screws on the right side of assembly Raise the display to the vertical position Make sure the bezel surrounding the rear panel connectors is in place Make sure the release mechanism for the Smartmedia card functions properly Lower the top cover down around the display and set in position Snap the rear of the top cover in place and then gently pulling on the thin plastic strip at the front of the top cover position it in place under the keyboard assembly Replace the screws removed in disassembly Revision A MAC 5500 resting ECG analysis system 4 13 2020299 020 Maintenance Disassembly Guidelines Main CPU Board Removal of CPU Board NOTE Before you begin save the current System Setups to an SD card and print System Setup report This will be used to restore the system setups after replacement of the CPU board 1 Remove the battery 2 Remove the top cove
123. ram The MAC 5500 CPU board contains all of the circuitry for the MAC 5500 resting ECG analysis system except for the line power supply acquisition module keyboard and display Although the MAC 5500 runs software derived from products based on the Max 1 architecture running on the C Exec operating system it has almost nothing in common with that hardware family In a nutshell the board contains the following 64 MB SDRAM holds both code and data m 32 MB SDRAM acts as video frame memory 32 MB NAND Flash holds FPGA configuration and system code 32MBNAND Flash for ECG Record storage m 128 KB Boot Data Flash holds primary boot image m CRT video DACs m External 12 Volt Power Switch m Acquisition Module Transceiver Power Switch m Printhead Power Switches and Pixel Test Circuit m Daughter Board Interface which support serial ports USB and PC card m Switch Mode Power Supplies 3 3 Volt for Logic LCD 5 Volt for Logic Printer 12 Volt for LCD backlight External Com Port Power Battery Charger 12 Charge Pump for Analog Circuits m Linear Power Supplies 1 8 Volt AT91RM9200 Core and FPGA Core 2 5 Volt Reference 3 3 Volt for System Supervisor Moe Stooge 12 Volt for Analog Circuits m Crystals Clocks 24 MHz Oscillator for FPGA 382 768 Khz Real Time Clock for Super IO chip 32 768 Khz AT91RM9200 18 432 Mhz AT91RM9200 4 Mhz 3 devices 1 for each Stooge Revision A MAC 5500 re
124. rdly low voltage readings from the battery temperature sensor indicate an open thermistor This is used as an indication that no battery pack is present The sole purpose for resistor R153 is to protect Moe s ADC AN3 pin in the case where the temperature signal TBATTERY becomes inadvertently tied to VBATT This can easily occur since the two pins are adjacent Should the short occur resistor R153 will limit the current and Moe s internal protection diodes will clamp the voltage to 3V C Battery Voltage Sensing Moe continuously monitors battery voltage during operation Excessively high pack voltages during charge will cause charge termination If battery pack voltage falls below a predetermined threshold during operation the battery gauge is immediately cleared to zero and the main CPU is notified of the critically low voltage System software then initiates an orderly shutdown to protect the battery pack and prevent loss of date time Ambient Temperature Sensor Extreme ambient temperatures are not favorable for battery charging Rapid changes in ambient temperature can cause premature or delayed charge termination by altering the pack s temperature Moe monitors ambient temperature via the thermistor RT1 to ensure that charging occurs only within the safe temperature range as well as to minimize the effects of changing ambient temperature on charge termination particularly to avoid premature termination which would give a fa
125. rear of the top cover free from the unit NOTE The top cover holds the bezel that surrounds the rear panel connectors so the bezel may fall free at this time At the front of the top cover gently pull the thin strip of plastic free from under the keyboard The entire top assembly is now loose NOTE It may be helpful to rotate the top cover 45 to provide a larger opening to clear the display Carefully lift the top assembly up and clear of the raised display Raise the display to the vertical position Make sure the bezel surrounding the rear panel connectors is in place Lower the top cover down around the display and set in position Snap the rear of the top cover in place and then gently pulling on the thin plastic strip at the front of the top cover position it in place under the keyboard assembly Replace the screws removed in disassembly Revision A MAC 5500 resting ECG analysis system 4 11 2020299 020 Maintenance Disassembly Guidelines Display Keyboard Assembly Removal Remove the top cover following the procedures above Disconnect the three cables connecting the display keyboard assembly to the main PCB NOTE Two of these cables have locked connectors that must be lifted up to release the cables Working from the outside of the top remove the two TORX mounting screws located on the right side of the assembly Remove the two TORX screws from the hinge bracket Remove the screw from
126. red to keep the AC power supply output current within specified limits In the extreme during printing charging ceases and energy is taken from the battery to meet peak system demands When system power draw declines all excess power supply capacity is once again delivered to the battery Revision A MAC 5500 resting ECG analysis system 2 35 2020299 020 Equipment Overview Theory of Operation Battery Temperature Sensor Moe uses a thermal sensor inside the battery pack to determine when to terminate charge During normal charge the electrical energy obtained from the power supply is stored in chemical reactions in the battery When the battery reaches full charge there are no more reactants available in which to store chemical energy and the supplied charge power is converted directly to heat The sudden rise in pack temperature caused by this release of heat is an indicator of full charge When the rate of pack temperature rise exceeds a certain threshold charge is terminated This is the only normal charge termination mechanism Fully drained battery may give higher temperature rise for initial few minutes To avoid the premature termination of charge the threshold is set at a higher level for first five minutes Abnormal conditions such as battery or ambient temperatures beyond spec or excessive pack voltage may also terminate charge Once fully charged the battery is maintained by low duty cycle charge current pulses Absu
127. rent V de voltage direct current VA volt amperes Var variable VDE Verband Deutscher Elektrotechniker German regulatory agency Vent ventricular VF ventricular fibrillation VGA video graphics array VIA versatile interface adapter VIO violet Volt voltage VRAM video RAM vs versus W w with W watt Warfar Warfarin WHT white WI Wisconsin X x by as in 8 1 2 x 11 XCV transceiver X Y Z orthogonal leads Y Y year yellow yr year yrs years YY year Symbols T SHIFTed or alternate function u micro uF microfarad us usec microsecond 68K 68000 amp and number C degrees Celsius F degrees Fahrenheit Q Ohm ohm percent registered gt greater than lt less than plus or minus 7 An asterisk after a signal name indicates the signal is active at its relatively lower potential or active low Signals without the Revision A MAC 5500 resting ECG analysis system A 11 2020299 020 Appendix A Abbreviations Standard Abbreviations asterisk suffix are active at their relatively higher potential or active high 12SL 12 simultaneous leads MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix B Technical Specifications evision MAC 5500 resting ECG analysis system 2020299 020 For your notes B 2 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix B Technical Specifications Technical Specifications Technical Specifications Displa
128. rial EEPROM Interface BBus Interface PWM Analog Outputs continuously This allows individual print dots to be driven with a small test current via a current source Q107 R319 Z100 enabled by a level shifter Q106 R318 driven from a ATMEL GPIO line Half of the resulting printhead voltage drop divider R320 321 may be measured to either determine the dot s resistance or at least determine if the dot is open A standard four wire SPI interface is provided for connection to a serial EEPROM memory CFGMEM The ATMEL exchanges a byte of data with the EEPROM by writing a value to the interface register Data is clocked at 4MHz quickly enough that no interrupt support is required The ATMEL CPU polls a ready bit to determine when the transfer is complete There are several I O functions poorly suited to direct control by the ATEML CPU whether for reasons of software complexity or power consumption These I O functions are provided by three 68HC705 microcontrollers placed strategically around the board Moe Larry and Shemp Each of these three microcontrollers must communicate with the ATMEL CPU BBus is a simple 1 wire point to point interface designed specifically for this purpose The FPGA provides a single BBus transceiver and a 3 way bidirectional multiplexer to attach the three BBus microcontrollers For more Bbus information see the microcontroller firmware source files From the programmer s standpoint BBus operates like SPI
129. rs directly driven by Larry s port pins The DAC output voltage approx 300mV full scale is compared to a filtered fraction of the applied DC motor voltage by comparator U59 If the motor feedback voltage is below the DAC voltage the comparator turns on the motor via an H Bridge driver One motor terminal which one is a function of motor direction is always grounded The other is alternately driven to either 12V or ground The duty cycle of the drive 2 32 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation signal determines the average applied voltage and therefore the average motor speed The feedback voltage signal is the average of both motor terminals R274 and R273 driving R309 with a 50 1 ratio 15Vin 300mV out hence 15V full scale Since one terminal is always zero grounded and the other is driven with a variable duty cycle between zero and 12V the feedback signal is positive regardless of motor direction C260 filters the switching noise from feedback voltage NOTE The frequency and duty cycle of the motor drive signal are random This serves to reduce EMI by spreading any emitted noise across a wide frequency spectrum An RC snubber R272 and C259 suppresses ringing on the motor lines Larry maintains precise motor speed control by comparing the frequency of the tachometer pulse train emitted by the motor s integral encoder to an internally generated reference
130. s will force the system to shutdown 2 34 MAC 5500 resting ECG analysis system Revision A 2020299 020 Equipment Overview Theory of Operation AC Power Battery Charger Battery and system power management is entirely Moe s responsibility An off the shelf 28V 1A universal input power supply provides operating charging power for the MAC 5500 Located in the bottom of the chassis the power supply is disconnected from the CPU board when the lid is open The battery connection is maintained through the hinge so the CPU board is capable of operating for a limited time with the door open An LT1511 switchmode charge controller Battery Charger provides battery charge current This device monitors both battery and power supply current draw and maintains both at safe levels As system current draw increases the Battery Charger automatically decreases battery charging current to maintain total power supply current below the design level nominally 1A Nominal charge current is also 1A which is achievable only when the system is off Moe enables disables the charger via CR102 When Moe pulls the CHRGTRL line low CR102 sinks current from the Battery Charger s VC pin shutting down the error amplifier and disabling switching R120 ensures that the charger remains off when Moe is starting up Lid Open Detection A self aligning connector routes power and motor signals from the power supply compartment to the CPU board When the li
131. shion Blinking of LED DS3 at 1 Hz indicates successful completion of FPGA configuration The primary boot program then load the secondary boot code from NAND to SDRAM transfer the control to secondary boot program Buffer U53 is used to get the direct CPU access to NAND Flash To configure the FPGA in fly by mode the data need to be present at the Xbus while toggling CCLK This is achieved by toggling the NAND_RE alternately with CCLK The NAND_RE need to be under the GPIO control instead of static memory controller to do this The ALE and CLE are also controlled in GPIO mode and tied to low level during read cycle while configuring the FPGA The CLE and ALE acts as address line A23 and A25 respectively during Address and command cycle as well as access other than FPGA configuration The reason for omitting A24 is because of AT91RM9200 silicon bug The A24 does not work like an address pin It can work only as GPIO line The primary boot code also contains the application for software update If there is no valid code in the NAND FLASH the primary boot code looks for SD Card and if detected it down load the code from the SD Card to NAND Flash and reset the system If the primary boot code can not detect a valid code within 2 minutes 6 seconds Moe shuts down the system The status of software update is indicated on DS1 and DS2 The DS1 and DS2 are not visible once the top cover is in place The Moe flashes amber charge LED at 1Hz to indicate that s
132. ssume the responsibility for performing the recommended maintenance schedule unless an Equipment Maintenance Agreement exists The sole responsibility rests with the individuals hospitals or institutions utilizing the device Required Tools and Supplies In addition to a standard set of hand tools you will need the items listed below Table 1 Tools and Supplies Item Part Number 10 TORX driver Leakage current tester MT 1216 02AAMI for 220V MT 1216 01AAMI for 110V Multifunction micro simulator MARQ 1 Precision dust remover Lint free soft cloth TX609 PS2 style keyboard J apan only Revision A MAC 5500 resting ECG analysis system 2020299 020 4 3 Maintenance Inspection and Cleaning Inspection and Cleaning Visual Inspection Perform a visual inspection of all equipment and peripheral devices daily Turn off the unit and remove power before making an inspection or cleaning the unit Check the case and display screen for cracks or other damage Regularly inspect all cords and cables for fraying or other damage Verify that all cords and connectors are securely seated Inspect keys and controls for proper operation Toggle keys should not stick in one position Knobs should rotate fully in both directions Exterior Cleaning Clean the exterior surfaces monthly or more frequently if needed 1 Use a clean soft cloth and a mild dish washing det
133. stall on the trolley Parts are included for two different trolley styles Disregard and do not use the parts indicated in the following illustration Card Reader QS Assembly di To install the Magnetic Card Reader and its mounting bracket on the trolley complete the following steps Do Not Use po adi These Parts 31A 1 Remove both end panels by pulling out and up at the bottom 19A 2 Using a Phillips screw driver fasten the card reader assembly under the front handle Align with holes provided under front handle 33A 3 10 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation P reparation for Use 3 Route the cable around the trolley column towards the rear as shown below rr Cable Routing pa Rear View E 34A 4 Atthe front hold the cable to the side so it clears the front panel as you replace the panel TIA 70A 6 Refer to the MAC 5500 Operator s Manual for information on using the Magnetic Card Reader Revision A MAC 5500 resting ECG analysis system 3 11 2020299 020 Installation P reparation for Use Bar Code Reader Installation The Bar Code Reader and its mounting bracket are ready to install on the trolley To install the Bar Code Reader and its cable mounting bracket on the trolley complete the following steps Barcode Cable Reader Clamp Cable Clamp Bracket ET umm 71A 72A 1 Fasten the cable clamp bracket to
134. sting ECG analysis system 2 7 2020299 020 Equipment Overview Theory of Operation m Atmel AT91RM9200 CPU Containing Incorporates the ARM920T ARM Thumb Processor 200 MIPS at 180 MHz Memory Management Unit 16 KByte Data Cache 16 KByte Instruction Cache Write Buffer In circuit Emulator including Debug Communication Channel Mid level Implementation Embedded Trace Macrocell 256 ball BGA Package Only Low Power 30 4 mA on VDDCORE 3 1 mA in Standby Mode Additional Embedded Memories 16K Bytes of SRAM and 128K Bytes of ROM External Bus Interface EBD Supports SDRAM Static Memory Burst Flash Glueless Connection to CompactFlash SmartMedia and NAND Flash System Peripherals for Enhanced Performance Enhanced Clock Generator and Power Management Controller Two On chip Oscillators with Two PLLs Very Slow Clock Operating Mode and Software Power Optimization Capabilities Four Programmable External Clock Signals System Timer Including Periodic Interrupt Watchdog and Second Counter Real time Clock with Alarm Interrupt Debug Unit Two wire UART and Support for Debug Communication Channel Advanced Interrupt Controller with 8 level Priority Individually Maskable Vectored Interrupt Sources Spurious Interrupt Protected Seven External Interrupt Sources and One Fast Interrupt Source Four 32 bit PIO Controllers with Up to 122 Programmable T O Lines Input Change Interrupt and Open drain Capabi
135. the SD card Cleaning Q ShouldI clean the MAC 5500 A Clean the exterior surfaces of all the equipment and peripheral devices monthly or more frequently if needed Use a clean soft cloth and a mild dishwashing detergent diluted in water 5 20 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting Frequently Asked Questions Battery Capacity System Setup Location Number Patient Questions Wring the excess water from the cloth Do NOT drip water or any liquid on the writer assembly and avoid contact with open vents plugs and connectors Dry the surfaces with a clean cloth or paper towel What is the capacity of the battery We recommend that the MAC 5500 be plugged into a wall outlet whenever it is not in use However the life of the battery is approximately 100 ECGs and one page reports or six hours of continuous operation without printing When entering in the patient data how do I get the Location field to automatically populate with the same number The Location number can be set in System Setup to save you from entering it for each test Goto System Setup Select Basic System Select Miscellaneous Setup 9 Arrow down to Location and type in the number you want set as your default Then press Enter Press the esc key until you return to System Setup Select Save Setup Select To System 999 You can select Main Menu to exit System Setup How
136. the display ground at the left of the hinge rod Slide the display hinge metal rod to the left to release it from the mounting detent A flat blade screw driver may be used to help slide the rod Two TORX Hinge Bracket Screws Display Ground Roll Pin Tabs Hinge Two TORX Mounting Screws 43A Slightly lift up on the right hand side of the display keyboard assembly and pull the assembly to the right to free the tabs from their mounting slots Do not lift the right side of the display too high or the plastic tabs may be damaged When free from the main unit the display keyboard assembly can be separated in to two pieces allowing replacement of either the keyboard or display assembly NOTE Further disassembly of the LCD assembly is not recommended Replace as complete assembly 4 12 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines Display Keyboard Reassembly Reassembly o Display Ground Display Ground lt LCD Flex Cable Roll Pin A Fasten to writer as shown Backlight 22 Flex Cable Flex Cable Align Flex to Pin r Slots LCD Flex Cable Backlight Flex Cable 45A 44A Insert both flex cables through flex cable slots and position them as shown Tilt the display keyboard assembly to the left and with the roll pin of the hinge metal rod parallel to the left hinge base insert the rod into the left hinge base and lowe
137. the relevant room complies with the requirements of the appropriate regulations The equipment is used in accordance with the instructions for use Revision A MAC 5500 resting ECG analysis system 1 5 2020299 020 Introduction Safety Messages General The intended use of this device is to record ECG signals from surface ECG electrodes This device can analyze record and store electrocardiographic information from adult and pediatric populations This data can then be computer analyzed with various algorithms such as interpretive ECG and signal averaging for presentation to the user This device is intended for use under the direct supervision of a licensed health care practitioner Failure on the part of the responsible individual hospital or institution using this equipment to implement a satisfactory maintenance schedule may cause undue equipment failure and possible health hazards To ensure patient safety use only parts and accessories manufactured or recommended by GE Medical Systems Information Technologies Contact GE Medical Systems Information Technologies for information before connecting any devices to this equipment that are not recommended in this manual If the installation of this equipment in the USA will use 240 V rather than 120 V the source must be a center tapped 240 V single phase circuit Parts and accessories used must meet the requirements of the applicable IEC 60601 series safety standards a
138. the underside of the rear handle using a Phillips screw driver and the self tapping screws provided NOTE DO NOT overtighten Overtightening the screw may cause the screw to strip and clamp to fail Cable Clamp Bracket Cable Clamp t 3 12 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation P reparation for Use 2 Press the Internal Access Button to open the MAC 5500 then plug the cable connector into port A Opening the MAC 500 before attaching the cable clamp allows you to place the correct amount of slack to free the cable from stress when the MAC 5500 needs to be re opened Internal Access Bore Button 74A 3 Next fasten the cable and clamp to the clamp bracket then close the MAC 5500 Observe that there is enough slack to allow free movement of the cable when re opening the MAC 5500 Correct amount of cable slack Not enough cable slack 4 Referto the MAC 5500 Operator s Manual for information on how to use the Bar Code Reader Revision A MAC 5500 resting ECG analysis system 3 13 2020299 020 Installation Preparation for Use Type S Trolley Assembly 1 To mount the MAC 5500 to the Type S trolley follow the steps in the illustration below 75A 2 Route patient cable through trolley and fasten with cable clamp as shown below 3 14 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation MAC 5500 ST Requirements and Configur
139. tromagnetic environment specified below It is the responsibility of the customer or user to assure that the MAC 5500 is used in such an environment Immunity Test EN 60601 Test Level Compliance Level Electromagnetic Environment Guidance Portable and mobile RF communications equipment should not be used closer to any part of the equipment including cables than the recommended separation distance calculated from the equation applicable to the frequency of the transmitter Recommended separation distance Conducted RF 3 Vrms 3 V rms EN 61000 4 6 150 KHz to 80 MHz d 12VP Radiated RF 3 V m 3 V m JP EN 61000 4 3 80 MHz to 2 5 GHz d 1 2 80 MHz to 800 MHz d 2 3 P 800 MHz to 2 5 GHz where P is the maximum output power rating of the transmitter in watts W according to the transmitter manufacturer and d is the recommended separation distance in meters m Field strengths from fixed RF transmitters as determined by an electromagnetic site survey should be less than the compliance level in each frequency range Interference may occur in the vicinity of equipment marked with the following symbol t3 and people a equipment NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies NOTE 2 These guidelines may not apply in all situations Electromagnetic propagation is affected by reflection from structures objects Field strengths from fixed transmitters such as base stations for radio cellular
140. troubleshooting the MobileLink Ultra High Security option see MobileLink UHS Installation amp Troubleshooting Guide PN 2020300 051 Revision A MAC 5500 resting ECG analysis system 2020299 020 5 19 Troubleshooting Frequently Asked Questions Frequently Asked Questions Maintenance NOTE See Operator s Manual for complete System Setup information Save Setups Q How do I save changes I have made to the System Setups A Check the following Return to Menu by pressing the esc key or selecting More from the menu until you see System Setup Select System Setup Select Save Setup Select To System 999 You can select Main Menu to exit System Setup Storing ECGs Q Why won t any of the ECGs I perform save to the SD card A Check the following Check that the SD card is fully inserted into the drive Make sure you are using 64 MB SD cards Verify that the SD card is not write protected Try a new SD card 999 If your system is not set up to automatically save records you must manually save by pressing Store Format an SD Card Q How do I format an SD card in the MAC 5500 A Most secure digital cards do not require formatting In the event an unformatted SD card is used with the system the following message will display This SD Card cannot be read and requires formatting Formatting will destroy all data on this SD Card Are you sure you want to format Select Yes to format
141. uipment described in the manual Is the battery installed When connected to the AC wall outlet does the green AC power light glow m Is the writer door closed MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting General Fault Isolation Power up Flow Chart Press ON key Sh20 Micro Controller MOE Sh16 nin 5 RESET NO AC present Sh16 pin 13 Battery OK Sh16 pin17 YES MOE enables 3VM and 5VM NO Stabilization period over MOE releases SysReset Sh16 pin10 ATMEL loads the primary boot code from Data Flash into internal SRAM Sh2 ATMEL executes the primary boot code and configures FPGA amp SDRAM controller ATMEL loads the remaining code into SDRAM from internal program flash Shi ATMEL running MOE disables 3VM and 5VM Run application software Start up screen displayed 60B 5 5 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshooting General Fault Isolation Poor Quality ECGs Poor quality ECGs can be caused by factors in the environment inadequate patient preparation hardware failures related to the acquisition module leadwires cables or problems in the unit Use a simulator to obtain an ECG report If the report is good the problem is external to the unit 5 6 MAC 5500 resting ECG analysis system Revision A 2020299 020 Troubleshootin
142. unication MAC and MUSE system compatible RS 232 Optional Modem LAN FAX and wireless transmission remote retrieval remote query Revision A MAC 5500 resting ECG analysis system B 3 2020299 020 Appendix B Technical Specifications Technical Specifications Writer Item Description Type Thermal dot array Speeds 5 12 5 25 50 mm s same as display Number of Traces 3 6 12 or 15 user selectable same as display Sensitivity Gain 2 5 5 10 20 10 5 split calibration mm mV same as display Speed Accuracy x 296 Amplitude Accuracy 5 Resolution Horizontal 1000 dpi 25 mm s 200 dpi vertical Paper Type Size Bud z fold perforated 215 9 mm x 276 4 mm 8 5 in x 11 in fanfold 300 sheets per pac Keyboard Item Description Type Sealed elastomer with soft function keys alphanumeric keys writer controls and TrimP ad cursor controls Electrical Item Description Power Supply AC or battery operation AC Input Voltage 100 240 VAC 10 15 Current 0 5 A 115 VAC 0 3 A Q 240 VAC typical Frequency 50 60 Hz 10 Battery Type User replaceable 18V 3 5 AH 10 rechargeable NiMH pack Battery Capacity 100 single page reports typical or 6 hours continuous operation without printing Battery Charge Time Approximately 4 5 hrs from total discharge with display off NOTE Cannot charge battery at or above 4
143. up Self Identification 6 ccc eee cect e tence eee eens 2 31 A a 2 32 A 2 32 LV a OG oc e n RE rcc d c dum 2 32 nA 2 34 MAC 5500 resting ECG analysis system Revision A 2020299 020 3 Installation ral Preparation for Use vc cccccecceeeeee cece enne 3 3 eJ Mr 3 3 Trolley Height Adjustment 3 4 Installing the MAC 5500 resting ECG analysis system 0c cece eee 3 6 Installing the Optional External Modem Kit 0 0 ccc eee e eee eee ees 3 8 Magnetic Card Reader Installation 0 0 ccc cece eee 3 10 Bar Code Reader Installation ccc cece cect ete e eee ene eneeaeeas 3 12 Type S Trolley Assembly 2 0 00 cece cece AEE rE DEEE 3 14 MAC 5500 ST Requirements and Configuration sene 3 15 Compatible Blood Pressure Units isses 3 15 Compatible GE Medical Systems Information Technologies Treadmills 3 16 Analog Treadmills 5 2 nna tees lc ee e red 3 16 Bicycle Ergomelters i soda eate ee ecce n Ae oe e 3 17 4 Maintenance onn nn n n n n n v n n 4 amp 1 Introduction i5 oorr wea aea Cw De E ACE P COO I YE waa 4 3 Recommended Maintenance isses ne 4 3 Required Tools and Supplies isses 4 3 Inspection and Cleaning snnm 4 4 VISUALIMSPECUOMS a a one DR ROO Ra edt 4 4 Exterior Cleaning Lts orar det a PE ar ear A 4 4 Interior ClO MING stead ts adri rh Ric c det onion ot 4 4 SCILICET M EIE 4 4 Thermal Printhead soo cales cet mie nb memet 4 5 Battery a
144. ure the MAC 5500 to the trolley by tightening the three captive screws located under the trolley tray 21A 5 Replace the end panel by pushing up and in until you hear a snap 22A 6 Unlock the wheels to allow free movement of the trolley 23A Revision A MAC 5500 resting ECG analysis system 3 7 2020299 020 Installation P reparation for Use Installing the Optional External Modem Kit NOTE The internal modem is standard for the MAC 5500 The modem and its mounting bracket comes assembled and ready to install on the trolley To install a modem kit on the trolley complete the following steps 1 Find the modem mounting site located under the Acquisition Module support arm at the rear of the trolley where the kit is to be installed 24A 252 2 Slide the assembly up in place so that the bracket slot catches on the bracket lip AT 26A 3 Tighten the three mounting screws to secure the modem to the trolley 29A 3 8 MAC 5500 resting ECG analysis system Revision A 2020299 020 Installation P reparation for Use 4 Plug the modem cable into connector port 2 on the MAC 5500 30A 5 Refer to the operator s manual for information on using the modem Revision A MAC 5500 resting ECG analysis system 3 9 2020299 020 Installation Preparation for Use Magnetic Card Reader Installation The Magnetic Card Reader and its mounting bracket are assembled and ready to in
145. use for disposable consumable products Follow local environmental guidelines concerning the disposal of hazardous materials Patient Mode of Operation Continuous Patient Leakage Current lt 10 uA Degree of Protection Against Electrical Shock Type BF defibrillation protection for the patient cable acquisition module Maintenance Frequency Daily visual inspection and routine cleaning if needed performed by user Use a commercially available industrial strength disinfectant cleaner on any part of the equipment other than electrodes which comes into direct contact with the patient Every six months routine maintenance checks and test procedures performed by qualified technical personnel Repair Guidelines Calibration instructions equipment descriptions and all other information which will assist qualified technical personnel in repairing those parts of the equipment designated as repairable is available in the field service manual for the equipment We will make available upon request circuit diagrams and component parts lists for printed circuit boards deemed repairable by qualified technical personnel Revision A MAC 5500 resting ECG analysis system B 7 2020299 020 Appendix B Technical Specifications Technical Specifications For your notes B 8 MAC 5500 resting ECG analysis system Revision A 2020299 020 Appendix C Electromagnetic Compatibility evision MAC 5500 resting
146. ved from the Super IO COM2 The COM2 can be routed to either COM2 external connector or to the daughter board interface using a multiplexer controlled using ATMEL CPU port pins The second serial interface has limited hardware control and derived from ATMEL CPU UART 1 VGA LCD CRT Interface An internal backlit LCD is home for the MAC 5500 s graphical interface In addition external VGA monitors are supported for stress applications Control for a standard VGA format 640 x 480 pixels LC display is provided by the FPGA The board is designed to support MAC3500 LCD display also Though the interface to LCD is same external CCFL backlit inverter is different for both display Two connectors are provided for external CCFL backlight inverters as well as two digital controls for On Off and brightness While the FPGA is capable of directly driving the LCD external hardware is required to generate the analog video levels expected by external VGA monitors Revision A MAC 5500 resting ECG analysis system 2 27 2020299 020 Equipment Overview Theory of Operation LCD Panel EMI Reduction Components To reduce EMI 47pF capacitors have been added to all LCD digital lines In addition 49 9Q resistors have been added to the video clock and Sync lines CRT Video DAC Sync Buffers A triple 6 bit video DAC supports external analog VGA monitors Only one DAC Level Shifter Buffer will be described as they are all identical in function
147. wever for access to the pixel data FIFO the upper 16 bit contains valid data and the this will be loaded into the next 16 bit word The VGA registers are accessed using 32 bit access The Frame Buffer area can be accessed either in 32 bit word mode or byte mode Revision A MAC 5500 resting ECG analysis system 2 13 2020299 020 Equipment Overview Theory of Operation Boot Loader In the 005 board after power ON the FPGA gets configured using the micro controller Curly The FPGA emulate the boot ROM and the start up code was placed in the Boot ROM from the smart media card by the micro controller Curly The ATMEL AT91RM9200 has built in boot program in the internal ROM The 006 board utilize the ATMEL CPU itself for bringing up the board Since the service of Curly is no longer required it is removed from the board At power ON if the BMS pin is high ATMEL starts executing boot code in the internal ROM The boot program looks for valid code in SPI data flash U64 and if found down load the program into SRAM and start executing from SRAM after remap The 006 boot program loads primary boot code into the SDRAM after initializing it The primary boot program reads the PCB ID code from three port pins and then searches the NAND Flash for a matching FPGA configuration image pages with ID Xn where n is the 3 bit PCB ID code 1 8 plus one Once located the configuration image is loaded into the FPGA in fly by fa
148. y 0 ccc ccc cect o 4 22 REMOVAl acia to S he det 4 22 Reassembly pce pte E oet e o eda 4 22 Trolley Casters corsario 4 23 Domestic Electrical Safety Tests nn nnns 4 25 AC Line Voltage Test ostia eec dis a ce RR CT eme Cs 4 25 Leakage Tests scere pee RETE arcaaehs AETUTEM M EPA 4 26 Leakage Test Diagrams isses 4 2 Ground Continuity 5 4 mn pe hibet daria un 4 29 Troubleshooting enne nn nee Del Assembly Descriptions ssssssssnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 5 3 INMOGUCHON Lt tiere adnan nus Ferro e Pree MR da Senate teu deti 5 3 Assembly Block Diagram sssssssssssse e 5 3 General Fault Isolation sen nnne nnn 5 4 Power p Self test reete RR OR ERR D RR HE ex d 5 4 Powerup Flow Chart reet ert erbe Ad a 5 5 POOF QUAN ECOS ie c e AAA LER E 5 6 Visual InSpectioDi 5a vetet vete Eel nib vcrba a backed 5 7 Diagnostic Tests nnn 5 8 Introductio eo etti eei a ona 5 8 Loading the System Diagnostics sss 5 8 Substitute MasterPassword sse 5 8 System Diagnostics Main Menu iiis 5 9 Display Tests it en Rb tepido eti pon ld acf dared 5 9 Pixel Verification Testaa taeraren eect e 5 9 Grey Scale Test Patterns 0 0 cect 5 9 SPOaker Test aid ada 5 10 Keyboard td bs 5 10 A O debe dictae ed n ee aue 5 11 Battery Tests ta uertice eta fog cce bad 5 13 MAC 5500 resting ECG analysis system Revision A 2020299 020 Battery tatus ii a a Ua dee RR 5 13
149. y Item Description Type 264mm 10 4 in diagonal graphics backlit AM LCD Resolution 640 x 480 pixels with waveform enhancement Displayed Data Heart rate patient name ID clock waveforms lead labels speed gain and filter settings warning messages prompts and help messages Computerized Electrocardiograph Item Description Instrument Type 15 lead 14 channel microprocessor augmented automatic electrocardiograph Analysis Frequency 500 samples s sps ECG Storage 200 maximum on internal non volatile memory Facility to archive ECG records on removable media SD card Digital Sampling Rate 4000 samples s channel Analysis Pediatric and vectorcardiography Optional 12SL analysis HI RES and PHI RES late potential analysis Pre acquisition Provides 10 s of instantaneous ECG acquisition Dynamic Range AC differential 15 mV DC offset 320 mV Resolution 4 88 uV LSB 250 sps 1 22 uV LSB 500 sps Frequency Response 3 dB 0 01 to 150 Hz Common Mode Rejection gt 140 dB 123 dB with AC filter disabled Input Impedance gt 10 MQ E 10Hz defibrillator protected Patient Leakage Current 10 uA Pace Detection 750 uV 50 us duration Orthogonal LA LL and V6 Special Acquisition Functions Disconnected lead detection electrode impedance AC noise baseline wander and muscle tremor Comm
150. y in either or both planes simultaneously The Revision A MAC 5500 resting ECG analysis system 2 19 2020299 020 Equipment Overview Theory of Operation bounding values top bottom left right define the rectangle to be filled in screen coordinates with 0 0 at the upper left and 639 479 at the bottom right The fill value contains both the dynamic 5 and static 8 pixel bits as well as two plane enable bits After loading the boundary control registers the CPU initiates the fill by writing the requested fill value and plane enable bits to the fill value register The fill is then queued for the next video frame and the fill engine becomes busy Fills are implemented synchronous with frame refresh At the completion of each line buffer fill request from the video timing generator the fill engine checks to see if a fill is underway If so the current video line position from the timing generator is compared to the top and bottom boundary registers If the current line is between the top and bottom the fill engine adds the left boundary value to the current line memory address as provided by the timing generator and proceeds to write the fill value into memory until the address matches the right boundary Depending on the width of the filled rectangle fill bursts can take anywhere from 100ns to 11us In this way the fill engine follows the video timing generator down the screen replacing pixels in the frame buffer
151. y specific BBus activity from the ATMEL CPU Moe himself is monitored by a self contained MAX823 watchdog timer brownout detector Moe must constantly toggle the MAX823 watchdog input pin or suffer the consequences NOTE Moe presumes that the main power rails which it controls are off when it powers up If Moe should malfunction while the system is already powered it is likely that the HC05 will incorrectly identify itself as Larry Larry s default power up state results in its port pins assuming a state that disables 3V M Since Larry does not service the watchdog chip WDOG another reset will follow within 2 seconds As 3V M is now down Moe will be selected at the next restart When SYSRESET is released ATMEL CPU configures the FPGA and load secondary boot program from information stored in NAND Flash Moe expects the ATMEL CPU to request status via the BBus interface after startup If that request doesn t arrive in time Moe places the system back in reset and removes power The time is set as two minutes six seconds for this version This time out considers the time for software update There is a provision to disable the Moe watch dog monitor using jumper W1 This is to facilitate the debug tool connectivity In the event of main CPU failure that causes loss of function yet maintains Moe s watchdog function a manual forced power down function is provided A continuous press of the power key for a period greater than 5 second
152. ystem menu Disable Options It is possible to disable an option In the rare instance you may need this functionality follow these steps 1 Within the system setup function select Basic System 2 Select Option Activation The Option Activation screen displays 3 In the entry field next to the option to be disabled type x followed by the existing option code The corresponding option will then be disabled To re enable the option remove the x preceding the disabled option code Revision A MAC 5500 resting ECG analysis system 4 19 2020299 020 Maintenance Disassembly Guidelines Printhead Replacement Removal 1 Remove the top cover following the procedure above 2 Using a Phillips head screw driver remove the two screws that hold the printhead to the printhead mounting plate 3 Open the writer assembly disconnect and remove the printhead Reassembly 1 Record the resistance value of the new printhead 2 Connect the new printhead to the ribbon cable 3 Hold the new printhead FIRMLY in place against the two metal tabs on the printhead mounting plate then tighten the two screws 4 Replace the top cover and power up the unit 5 Go to the Setup menu and enter the new printhead resistance value 6 Runa Writer Test test See Chapter 5 4 20 MAC 5500 resting ECG analysis system Revision A 2020299 020 Maintenance Disassembly Guidelines COMM Board Replacement 1 Remove the screws from the p

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MAC® 5500 Resting ECG Analysis System