Ultrasound Technologies Ltd Fetatrack 310 Service Manual Issue 3

Transcription

1 Ultrasound Technologies Ltd Fetatrack 0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

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3 Ultrasound Technologies Ltd Contents ABOUT THIS MANUAL... SAFETY IN USE... Special Precautions... Electrical Shock Hazard... Explosion Hazard... Handling the Delicate Transducers... Symbols Used... PARTS AND THEIR FUNCTIONS... FT0 Front Panel Controls... Recorder On/Off... Front Panel Event Mark... Volume Up... Volume Down... US / US Transducer Select... Toco Zero... Indicators and Connectors... 5 Power On Indication... 5 RS Output... 5 Remote (Patient) Event Marker... 5 Probe Connection... 5 User Configuration... 6 The Printer... 8 Ultrasound Fetal Monitoring... 9 Uterine Activity Monitoring... 0 Fetal Activity... 0 Alarms... Transducer Belts... Interpretation... TROUBLESHOOTING... No Display Information on LCD... Keyboard Does Not Respond... No Sound From Loudspeakers... No FHR Information on Display or Recorder... No Chart Printed... MAINTENANCE... General... System Cabinet... Transducers... SPECIFICATION... 5 ENVIRONMENTAL... 6 Electrommagnetic Compatibility...7 WEEE and RoHS... 8 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

4 Ultrasound Technologies Ltd Contents Dismantling Procedure...9 Internal Layout...9 Circuit Description...0 Power supply Circuit...0 Ultrasound Circuit... Oscillator and Transmitter output... Receiver and Detector... Audio Amplifier... Signal Pre-processing... Ultrasound Channel... Toco Circuit... Event Marker... Microprocessor Circuit... Printer Interface... Display... Data Storage... Performance...5 Introduction...5 Performance Checks...5 Drawings...7 Parts Lists...7 Circuit Data...7 Assembly Drawings...7 Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

5 Ultrasound Technologies Ltd About This Manual This booklet explains the operation and service of the FETATRACK 0 Antenatal Cardiotocograph. Care has been taken during the design and manufacture of this product so that it satisfies all of the current safety standards set down by BS EN To achieve the best from this product read the following sections several times and if you have any problems in the operation of a particular part of the product then contact your dealer immediately or contact : Ultrasound Technologies Ltd Lodge Way Portskewett Caldicot, NP6 5PS South Wales UK Tel + (0) 9 55 Fax + (0) service@doppler.co.uk This service manual contains circuit descriptions, diagrams, parts and spares lists for the FETATRACK 0.. To maintain the FETATRACK 0 s performance it is recommended that it be included in a periodic maintenance program. The user preventative maintenance program is covered in this manual. Maintenance outside the scope of the user should be undertaken on an annual basis by trained service personnel; full details are available from your supplier, service centre or from Ultrasound Technologies Ltd. The FETATRACK 0 is supplied complete with the following: - FETATRACK 0 Single Fetus Monitor US Monitoring Transducer External Toco Transducer Patient Event Marker Belt and Buckle set (x) Chart pack (x) Power Cord Operating instructions Coupling gel (0.5ltr) FETATRACK 0 Twin Fetus Monitor US Monitoring Transducer US Monitoring Transducer External Toco Transducer Patient Event Marker Belt and Buckle set (x) Chart pack (x) Power Cord Operating instructions Coupling gel (0.5ltr) Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

6 Ultrasound Technologies Ltd About This Manual Special Precautions Electrical Shock Hazard Your FETATRACK 0 Antenatal Cardiotocograph has been designed for electrical safety. All the safety and operating instructions should be read before operating the FETATRACK 0. Failure to do so could result in injury to the user, patient, or damage to the system and accessories. Do not defeat the grounding integrity of this system. Protection against electrical shock, in the event of failure of basic insulation, is provided by the connection of the chassis to the safety ground. Safety grounding occurs only when the -wire cable and plug provided with the system are connected to a properly grounded receptacle. Do not remove the system cover. The system should be serviced by trained and qualified personnel only. Contacting the hazardous voltages within the system could cause serious injury. Do not use the system if the power cord has any cuts or openings. Do not use the transducer if the cable has any cuts or openings. Do not use the transducer if the transducer face is cracked or chipped. Do not immerse the transducer cable connectors in any liquids. Should the electrical safety fuses have to be replaced, use only fuses of the same type and rating. Explosion Hazard Do not operate or use this system in the presence of flammable anesthetics or gases as it could lead to explosion. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

7 Ultrasound Technologies Ltd About This Manual Handling the Delicate Transducers The transducers are delicate parts of the ultrasound system and should be treated with care. The delicate crystals in the transducer may crack and render the transducer unusable if the transducer is subject to shock. Room temperature liquids should be used for cleaning. NEVER use alcohol or mineral oil as an acoustic coupling agent as transducer face and cable damage will occur. ONLY use approved ultrasound coupling gels. Symbols Used The following symbols are used on the FETATRACK 0 and are in accordance with BS EN Where they are associated with the connection of external equipment, that equipment must meet the relevant safety standards in all cases. Alternating current Associated with power on indicator Type B Equipment Unit classification Off (power: disconnection from the mains) On (power: connection to the mains) Attention, consult accompanying documents. Associated with auxiliary connections see operating instructions. This symbol on the product or on its packaging indicates that this product must not be disposed of with your normal waste. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

8 Ultrasound Technologies Ltd Parts and Their Functions FETATRACK 0 Front Panel Controls The front panel control area contains 6 buttons used to control the operation of the unit, they are all indicated by icons to aid language variations. Event Mark. Places arrow in upper portion of chart Volume Up Volume Down Toco Zero. Sets Toco channel to preset baseline value. Recorder On / Off and speed control Select ultrasound channel for audio output in twins mode. Recorder On/Off and Speed Change This button is used to control the operation of the recorder. Press once and the chart recorder will start, each consecutive short press will change the speed. Pressing and holding the button down will stop the recording. Event Mark Volume Up Places an event mark arrow at the top of the FHR scale. This button is used to increase the audio volume level, or in configuration mode to change user options. Volume Down This button is used to decrease the audio volume level, or in configuration mode to change user operations. US / US Transducer Select in Twins mode Pressing this button changes the selected probe from US to US for volume output. This is used when the unit is in twins mode with two US channels for listening to either of the two fetuses. Press and hold to activate twins trace offset. Toco Zero This button zeros the Toco trace to the selected baseline. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

9 Ultrasound Technologies Ltd Parts and Their Functions Inputs / Outputs and Displays Power On Indication The green LED associated with the above symbol indicates that power is connected to the apparatus when illuminated. RS Output Remote Event Marker This output is for the connection of an external computer for data transfer. The maximum voltage that can be applied to this output is 5VDC. WARNING: Any external equipment connected to this output must meet the equivalent MEDICAL safety standard to this product. Connection must only be made by a qualified technician. An isolation connection may be necessary when connection is to be made to a personal computer. Connection of an external event mark switch allows the patient to indicate events by printing an arrow in the gap between the FHR and UA traces. The maximum voltage that can be applied to this output is 5VDC. Probe Connections US, US, Toco This is for the connection of approved Doppler and Toco transducers. The maximum voltage that can be applied to this output is 5VDC. Fetatrack0 Service Manual Issue Page 5 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

10 Ultrasound Technologies Ltd Operating Procedures Operating the FETATRACK 0 In this section, information is supplied which will help you use the FETATRACK 0 for the fist time. User Configuration Firstly connect the AC supply cord. It is necessary to set the operation of the FETATRACK 0 to meet your requirements. Before turning the FETATRACK 0 on, press and hold down the Toco Zero button. Then, whilst keeping the Toco Zero button pressed down, turn the FETATRACK 0 on by flicking the AC input on/off switch which is located on the rear of the unit as part of the AC line input socket. When the unit is on the front panel LED will be illuminated. The FETATRACK 0 starts and then enters its User Configuration Mode, release the Toco Zero button as soon as Calibrate System is displayed. You are then prompted to enter the date if different to that displayed. To change the day and month press the Volume Up button. One press advances the day by one, pressing the Volume Up button for longer advances the day by 0. To change the year press the Volume Down button. One press advances the year by one, pressing the Volume Down button for longer advances the year by 0. When the correct date is displayed press the Toco Zero button once. You are then prompted to enter the time if different to that displayed. This works in a similar manner to the date with the Volume Up button advancing the hours and the Volume Down button advancing the minutes. When the correct time is displayed press the Toco Zero button once. You are then prompted to enter the Toco Base Line offset. This sets an artificial zero line for the toco transducer above zero, it can be set by pressing the Volume Up or Volume Down buttons for a value between 0-0. After setting this value the Toco will be set to this every time the Toco Zero switch is pressed, and allows small negative Toco excursions to be seen on the chart. When the chosen zero offset is displayed press the Toco Zero button once. Fetatrack0 Service Manual Issue Page 6 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

11 Ultrasound Technologies Ltd Operating Procedures You are then prompted to enter the Toco Filter Value. This sets the filtering within the monitor to produce a smoother Toco trace if required. ( The filter can remove some of the maternal breathing artifact). It is set by pressing the Volume Up button for a value soothing value between sec and sec.. When the correct filter value is displayed press the Toco Zero button once. You are then prompted to enter the Toco Range. This sets the response of the Toco transducer to either a full scale of 00 or 00 on the chart print out. It is set by pressing the Volume Up button for a value between 00 and 00.. When the correct range is displayed press the Toco Zero button once. You are then prompted to enter the Chart recorder speed. This sets the initial turn-on speed of the chart recorder. Then once the chart is running the speed can be further changed to, or cm/min. It is set by pressing the Volume Up button for a value of, or cm/min.. When the correct speed is displayed press the Toco Zero button once. You are then prompted to select the Data Block on or off. The Data Block is printed at the start of each recording, this function can be disabled by setting Data Block to off. It changes from on to off and back again by pressing the Volume Up button.. When the Data Block is set to your requirements press the Toco Zero button once. You are then prompted to select the Tachycardia Alarm on or off. The Tachycardia Alarm is triggered when the system detects a Tachycardia above a preset value that the user can choose. The Alarm can be a level alarm or one calculated from a complex. Press the Volume Up button to change the setting. The alarm is tone is silenced by pressing the units Volume button. When the Tachycardia Alarm is set to your requirements press the Toco Zero button once. You are then prompted to select the Bardycardia Alarm on or off. The Bradycardia Alarm is triggered when the system detects a Bradycardia below a preset value that the user can choose. The Alarm can be a level alarm or one calculated from a complex. Press the Volume Up button to change the setting. The alarm is tone is silenced by pressing the units Volume button. When the Bradycardia Alarm is set to your requirements press the Toco Zero button once. The FETATRACK 0 will then restart and operate according to your settings. The FETATRACK 0 is now operational, and the LCD screen will show US --- us --- (if the unit is only a single fetus monitor it will only display US ---) and a Toco value. Fetatrack0 Service Manual Issue Page 7 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

12 Ultrasound Technologies Ltd Operating Procedures The Printer The FETATRACK 0 prints on preprinted z-fold thermal paper using a thermal array print head. Fetal heart rate, uterine activity, and fetal movement are recorded together with date, time, recorder speed, operating mode and alarm status. The printer also prints a header block each time the printer is turned on, that contains Time and Date, Patient Name, Gestational Age, Patient or Bed Number, Hospital or Doctor along with a print viability test bar that prints to all dots of the printhead. To load the printer with paper, open the printer door by pulling the recorder door using the opening provided on the printer. It will then release and opens downwards exposing the printer paper tray. Remove the new paper pack from its protective plastic cover and insert the pack into the recorder so that the printed side of the paper is uppermost and the FHR trace is on the left. Pull the paper out of the front of the unit making sure it is positioned parallel to the roller and the close the door. The pack will self align when the recorder is run. To operate the printer press the Recorder On/Off button. The printer will start to run and the chart speed will be shown in the LCD display. To turn the printer off press and hold the Recorder On/Off button until the printer stops. (This only operates after the data block has been printed). A small amount of paper will be fed out at high speed. The printer will record at, or cm/min. To change the speed during recording simply press the Recorder On/Off button momentarily. The FETATRACK 0 can be run at the speed of your choice, and will always start at this pre-programmed speed every time the printer is turned on. For details of how to change the preprogrammed speed refer to User Configuration. When the paper pack runs out the Fetatrack 0 will sound a short alarm and display Paper?. For the next 0 min the system will store HR, HR and Toco until either the store becomes full, the user presses and holds the Recorder On/Off button to reset the store and loose the stored data or the user inserts a new paper pack, presses Recorder On/Off button once and the Fetatrack 0 prints the stored data and returns to normal printing. When the store reaches 90% full the Fetatrack 0 will Alarm and show StoreLow, if the store then becomes full the display changes to StoreFull and there will be no further storage. The data can still be printed by pressing Recorder On/Off button once or reset by pressing and holding the Recorder On/Off button. The print from store is lighter than the normal trace to distinguish stored data. Fetatrack0 Service Manual Issue Page 8 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

13 Ultrasound Technologies Ltd Operating Procedures Ultrasound Fetal Monitoring The FETATRACK 0 ultrasound transducer is used to detect and monitor the fetal heart beat. The FETATRACK 0 can monitor twins and if this option is chosen it is supplied with two Ultrasound transducers. The primary Ultrasound Transducer (always supplied ) has a yellow coded plug while the twin channel has a blue coded plug. Push the relevant plug firmly into is colour coded front panel US socket and turn the unit on. Locate a clear fetal heart sound using a Doppler Fetal Heart Detector and secure the stretch belt in position, so that it passes over the transducer site, and clamp in place by fastening the buckle after feeding the belt through the transducer. Apply gel to the surface of the transducer locating it approximately in the position determined by the Doppler detector. Position the transducer to obtain the clearest fetal heart sound. The heart rate processor will start to calculate heart rate within a few seconds and the heart rate can be observed on the LCD display. Correct operation can be verified by observing that the pulse lamp is flashing at the heart rate. The heart shaped fetal pulse indicator is also used as a signal quality indicator. When positioning the transducer observe the indicator, which should be solid under the best signal conditions. If this indicator is only showing an outline heart then this is an indication that the signal quality is not optimum. Improved recordings can be obtained by repositioning the transducer so that this indicator always shows a solid heart. In the absence of signals of adequate quality this indicator will be permanently off. The audio volume can be increased by pressing the volume up button marked with the up arrow. Conversely to decrease audio volume press the button marked with the down arrow. In twins mode the audio output is selected for either channel by pressing the US / button. The selected channel is indicated on the LCD display by the capital US letters. Once a clear fetal heart signal has been located set the volume to the desired level using these controls. Transducer position should be checked at least half-hourly during labour-monitoring or prolonged NST. When repositioning the transducer, further coupling gel may be required When repositioning the transducers always ensure that the fetal pulse indicates the optimum signal conditions. Results will vary from one patient to another, but in all cases good transducer positioning is essential, and this may be aided by the use of a liberal amount of coupling gel. With the fetus in the vertex presentation, and the mother sitting or supine, the clearest sound will normally be found on the midline below the umbilicus. In the lateral position, clearer sounds may be found with the transducer displaced from the centre line to the upper surface of the abdomen. The clearest signals in breach presentation may be located higher and to one side. Fetatrack0 Service Manual Issue Page 9 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

14 Ultrasound Technologies Ltd Operating Procedures Transducer position which results in sounds with a strong placental or cord signal should be avoided, as these frequently render traces with artifacts. It is important that a distinct fetal heart sound is present during monitoring for correct function of the unit. Any doubt about fetal variability should be checked by listening to the audible signal, or by an alternative diagnostic technique. A simple check of the ultrasonic system can be made by holding the transducer against the palm of the hand and stroking the back of the hand at a fixed rate, for example, twice per second. A clear audible signal should be heard and the digital display should show a rate after approximately five seconds. With the printer running this rate will be recorded on the chart. In the event of HR and HR traces overlapping or having similar rates the HR (US) trace can be offset by 0bpm by pressing and holding the US½ key. This is reset when the recording session finishes. Uterine Activity Monitoring The Toco transducer is used to monitor uterine activity. The transducer plug is colour coded grey for ease of identification. To monitor uterine activity plug the Toco transducer into the grey UA input socket. The Toco transducer is sealed to prevent the ingress of fluids. NO coupling gel is required for this transducer to operate correctly. Place the transducer on the centre line over the fundus in a position where the uterus is firm, and secure in place with the stretch belting. Attach belt in the same fashion as with the ultrasound transducer. Once the transducer is in position, push the Toco Zero button on the front panel to zero the recording. The position of the zero baseline can be set to suit individual preferences. For details of how to change the pre-programmed baseline refer to User Configuration. Fetal Activity Fetal activity may be recorded with the assistance of the patient. A hand-held marker switch is provided for this purpose and this is plugged into the socket immediately to the right of the UA input on the front of the unit. If the patient feels movement of the fetus she may press the switch and this will mark the paper with an arrow in the gap between the HR and UA traces. Alternatively this marker may be used by the midwife to indicate any changes made during the procedure, such as repositioning of the transducers or movement of the patient. A front panel event marker is also provided, and this marks the trace on the top edge of the HR scale. This can be used where two types of indication are required. Fetatrack0 Service Manual Issue Page 0 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

15 Ultrasound Technologies Ltd Operating Procedures Alarms: The Fetatrack 0 has built in Bradycardia and Tachycardia alarms. These can be set On or Off in the setup program. The status of the alarms are printed in the center of trace between the UA and FHR traces. When an alarm is activated a down arrow with an A is printed at the top of the trace and an audio alarm sounds. Pressing either volume up or down can reset the alarm. When set to Level the Fetatrack 0 monitors the average of the last 0 sec of Heart Rate data and alarms if this falls below the selected numeric value. When set to Complex the Fetatrack 0 monitors the last time periods of 0 sec each of Heart Rate data and alarms if the fall below the selected numeric value and are in a descending rate for Bradycardia or ascending for Tachycardia. Paper Out will sound a short alarm to draw attention to the monitor, if the paper out store reaches 90% full the Alarm will sound again until cancelled by the user pressing either volume up or volume down. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

16 Ultrasound Technologies Ltd Operating Procedures Transducer Belts Both the ultrasound and contractions transducers are held in position with elastic belting which maintains the active elements in contact with the abdomen. The belts should first be placed around the patient and held in place at the correct tension with the plastic buckles. As the transducers are free to slide on the belt final positioning can be easily achieved. Similarly repositioning of the transducers is made very much simpler. Interpretation The following is intended only as a brief guide. For a fuller explanation of the interpretation of chart records, refer to suitable reference books. During the antepartum period the Non Stress Test (NST) is an accurate means of predicting fetal well-being. The criteria proposed by Schifrin et al for the interpretation of the NST is summarised. Reactive - accelerations of 5 BPM or more which last for 5 seconds or longer twice in any 0 minute period. These may be accompanied by fetal activity. Non-reactive - evidence of fetal movement during a forty minute period, but without the reactivity indicated above. Unsatisfactory - recording quality too poor to determine the above criteria. Stimulation of the fetus, or repositioning of the transducers may result in an improved recording. Results from the NST may indicate the requirements to perform other diagnostic checks such as the Contractions Stress Test (CST). Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

17 Ultrasound Technologies Ltd Troubleshooting The information in this section will help you to check and correct common operation and system problems. Refer to the troubleshooting hints which deal with your problem. Perform the suggested steps. If the problem is not solved, check once again to make sure that you have used all of the suggested steps to resolve the problem. Electronic failures and service procedures are not included in this manual, as all servicing of the system must be performed by a qualified service technician. Valuable time however can be saved by documenting the problem. In general, when you have a problem, check your control settings to be sure that they are in proper operating position. Consult the appropriate section in this manual for specific information on particular controls or operating modes. WARNING: Disconnect system from the power source before checking fuses and connections. Check all connections and fuses. Replace fuses with same type and rating as indicated on the rear panel of the unit. No display information on LCD Verify the system is on and that the fuses are intact.: Keyboard does not respond No sound from loudspeaker. Reset system by turning off then back on. Verify the system is on and that the fuses are intact. Verify the system is on and that the fuses are intact. Check volume control is set high. Check that the correct transducer has been selected. Check connection of the transducer. No FHR information on display or FH trace printed on recorder. Check that the correct transducer has been selected and connected to the patient. Check connection of the transducer. Check for audio FH complex and reposition transducer until clearly heard. No chart printed. Verify the system is on and that the fuses are intact. Check that the recorder is turned on. Check paper is inserted into the recorder correctly. Check recorder door is correctly closed Check that paper moves out of the recorder at the correct rate. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

18 Ultrasound Technologies Ltd Maintenance The following are the user preventative maintenance tasks. It is recommended that these be performed on a regular basis at a frequency determined by the usage of the equipment, but not less than once every month. WARNING: General Before undertaking any of these tasks disconnect the unit from the mains. Check all cables, connectors and transducers for damage and repair or replace where necessary. The repair may involve your local service centre, supplier or Ultrasound Technologies Ltd. For advise on any damaged part contact them immediately. Cleaning - Enclosure Clean the exterior of the system with a soft dry cloth. In the event of stubborn spots, disconnect the system from the power source. Use a soft cloth that has been dampened - not soaked - in a mild detergent solution or isopropyl alcohol. Be sure to keep excess moisture from entering the cabinet via any openings that may be present. Cleaning - Transducers Use a cloth dampened in a mild detergent solution or isopropyl alcohol to clean the transducer and cable. Remove all traces of the detergent or alcohol by wiping with a cloth dampened in clear water. Never soak the transducer cable or connector. WARNING: Transducers must never be exposed to gas or heat sterilization or be left immersed in any liquid for more that a few seconds. Fetatrack0 Service Manual Issue Page Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

19 Ultrasound Technologies Ltd Specification Ultrasound Frequency Transducer Audio Response Range Power Output Signal Processing Indicators.5 or. and.8 MHz continuous wave Multi element wide angle 00 - KHz 50-0 bpm 5 mw/sq cm max. SATA Software AUTOCORRELATOR LCD heart rate and pulse indication Toco Event Mark Transducer Differential external pressure transducer Response 0-5 Hz Scale 0-00 Indicators LCD Toco numeric level indication Hand held Unit Front Panel User operated User operated Alarms Bradycardia Tachycardia Paper Out Complex and Level alarms Complex and Level alarms Short Alarm Data Presentation Strip chart recorder and alphanumeric display module. Printhead inch thermal solid state printhead Resolution 8 dots / mm Speeds,,,cm/min Speed accuracy Better than % Paper Z fold Paper type Black thermal Paper out storage 0 mins Display Controls Indicators character by line LCD display module 6 control buttons (for Paper Start /Stop, Volume Up, Volume Down, US½, Toco Zero and Event Mark) Green power on/ off Fetatrack0 Service Manual Issue Page 5 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

20 Ultrasound Technologies Ltd Specification Power Supply AC input voltage Frequency Power VAC or 00-0 VAC (User selected) 6-6 Hz 60VA Enclosure Material Aluminum Safety 0Environmental Working temperature +0 C to +0 C Relative humidity 0% to 75% Storage/Transport temperature -0 C to +70 C Unit Electrical Designation Designed to BS EN Class Type B Computer interface Transfer Data Rate Data Standard Data Format wire RS 9600 baud 8 bits no parity stop bit UltraTec Comms Standard The following Consumables are available for use with the FETATRACK 0 Belt / Buckle set (0 belts / Buckles per pack) Chart pack (0 per pack)) Power Cord Coupling gel (0.5ltr) ( per box) This Equipment complies with the essential requirements of the European Council Directive. 9//EEC 00 Fetatrack0 Service Manual Issue Page 6 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

21 Ultrasound Technologies Ltd Electromagnetic Compatibility Guidelines for Identifying and resolving adverse EMC conditions Emissions Immunity EMC Testing Care has been taken through the design and manufacturing processes to minimise the EM emissions that may be produced by this equipment. However, in the unlikely event that the unit causes an EM disturbance to adjacent equipment, we suggest that the procedure is carried out 'out of range' of the affected equipment. If the user has any doubt regarding the unit's EM immunity during routine operation, we suggest that the source of EM disturbance is identified and its emissions reduced. If the user has any doubt regarding the identification and resolution of adverse EM conditions, they may contact Ultrasound Technologies Ltd to seek advice During conformity testing the Fetatrack 0 was subjected to International Standard EMC tests. During the majority of these tests no non conformances were observed. During EN6060--:00 testing the FetaTrack 0 was shown to be susceptible to the following tests. Conductive disturbance induced by applied RF field Radiated RF Test applied a Vrms RF magnetic field to transducer cables with a Hz modulation. Test applied: V/m 80Mz to.5ghz Effect was a displayed rate of 5 to 5 bpm at each harmonic and sub harmonic of the transducer frequency. No disturbance was detected at other frequencies Effect was a disturbance to the UA transducer causing a static UA reading of up to 9 units Applied test signal is very high for high sensitivity electronics and non applied transducers. With correctly applied transducers interference from in band RF signals is unlikely. Normal operation is unaffected and the static reading can be cancelled by pressing the toco zero button Electrical fast transients and bursts Test applied: +/-KV AC power, +/- Effect was a FHR reading of 98 BPM KV Signal Cables. Normal mains power is unlikely to cause such a transient / burst. Displayed rate is unlikely to occur when transducers are connected to a patient. Electro Static Discharge Test applied: +/-KV, +/-Kv, +/- Unit should be used in a low static 8KV Air Discharge, +/-KV, +/- KV, +/-6KV Contact Discharge. Repetition Rate second environment. Displayed rate is unlikely to occur when transducers are Effect was a FHR reading of 58 BPM. connected to a patient. Surge Test applied: +/-0.5KV, +/-KV, +/- Normal mains power is unlikely to cause KV AC power line to ground, +/- such a surge. Displayed rate is unlikely 0.5KV, +/-KV, +/-6KV AC power to occur when transducers are line to line Effect was a FHR reading of 58 BPM. connected to a patient. Fetatrack0 Service Manual Issue Page 7 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

22 Ultrasound Technologies Ltd Circuit Description Waste Electrical and Electronic Equipment (WEEE) Directive (00/96/EC) There is an increasing interest in the proper disposal of used electronic equipment. The European Union (EU) has developed the WEEE (Waste Electrical and Electronic Equipment) Directive to ensure that systems for collection, treatment and recycling of electronic waste will be in place throughout the European Union. Ultrasound Technologies Position with regard to the WEEE Directive Product recycling is nothing new and Ultrasound Technologies have implemented processes in each member state where the company has a presence. Ultrasound Technologies will comply with the provisions of the WEEE Directive and national implementing legislation. Instructions for Disposal of Waste Equipment by Users in Private Households This symbol on the product or on its packaging indicates that this product must not be disposed of with your other household waste. Instead, it is your responsibility to dispose of your waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste equipment for recycling, please contact your local waste disposal authority, your household waste disposal service or the supplier where you purchased the product. As a producer of electronic devices, Ultrasound Technologies will provide for the financing of the treatment and recycling of waste returned through these designated collection points in accordance with local requirements. Instructions for Disposal of Waste Equipment by Commercial Users For users of Ultrasound Technologies equipment, other than private households, Ultrasound Technologies will provide free recycling of equivalent medical electronic equipment once a customer has returned the equipment to Ultrasound Technologies, with all transport and importation costs paid, and where a replacement product is being supplied by Ultrasound Technologies. Where a replacement product is not being supplied, recycling services may be provided on request at additional cost. RoHS The RoHS (Restriction of Hazardous Substances) directive (00/95/EC), compliments the WEEE Directive by banning the presence of specific hazardous substances in the products at the point of manufacture. Ultrasound Technologies is a manufacturer of Medical Devices and is currently exempt from this directive. However at Ultrasound Technologies we take our responsibilities to the environment very seriously and currently 00% of our entire manufacturing process and parts meet the RoHS directive and we are therefore fully compliant.. Fetatrack0 Service Manual Issue Page 8 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

23 Ultrasound Technologies Ltd Disassembly Dismantling Procedure Note: Before disassembling the unit, unplug the transducers, accessories cable (if present), and the power cord from the instrument. To remove the Top Cover, remove the four screws around the edge on the bottom of the unit. Open the recorder door and then carefully lift the lid upwards. The Top Cover can now be removed taking care to disconnect the earth bonding cable connecting the lid to the base, and carefully disconnecting the front panel pcb interface cables. The recorder and display module can be removed from the lid by careful removal of the screws holding the parts in place. Be careful not to loose the spacers lying behind these cards. Internal Layout With the top cover removed and the front panel facing you, there is one large printed circuit board fixed to the base of the monitor this contains all the power supply circuits, all the control circuits and the Ultrasound, Toco and digital signal processing circuits. In addition, there is the Front panel displays, keyboard interface and printer drive circuits card mounted on the Lid of the unit. Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

24 Ultrasound Technologies Ltd Circuit Description Power supply Circuit The 0/0 VAC supply enters the FETATRACK 0 via an IEC double fused inlet / mains filter and switch and is fed to a torroidal transformer. The input supply voltage is stepped down to a nominal VAC and is then bridge rectified by D9, smoothed by C0. Regulated Supplies The voltage regulators (U8 and U9) are fed from D9 at a voltage of around 6VDC. These oscillate at approximately 0 KHz transferring pulses of current into L and L respectively. The output of inductor is fed back directly into U8 (9) which at pin is reference comparator and alters the pulses transferred into the inductor to obtain a stable voltage output. The output of U8 is 5V DC and U9 is V DC. Pulses of current in to inductor L are also taken into a charge pump to provide a stable V DC after regulator transistor Q. D9 also supplies current to the printhead and motor drive circuits via Q and U0 which provides a stable V DC. Printhead and Motor Drive Supply The printhead requires pulses of current equalling 0A but for a very small amount of time, therefore current is taken from the charge built up in C rather than expecting the power supply to supply the pulses. Q is connected as an ON/OFF switch to the printhead voltage circuits to act as protection. An explanation of its operation can be found in section PRINTER INTERFACE. When ON, current is fed to U0 connected as a variable voltage regulator with a range of +8 v to + v where VR adjusts this voltage. Print density is controlled by this voltage but it is recommended that this voltage should be no greater than Vdc. Fetatrack0 Service Manual Issue Page 0 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

25 Ultrasound Technologies Ltd Circuit Description Ultrasound Circuit Overview The ultrasound circuit is built up of four discrete sections. These are: Oscillator and Transmitter amplifier Receiver and Detector Audio amplifier Signal pre-processing. These operate to produce a continuous wave of MHz ultrasound which is passed to the transmitter crystal in the transducer. The signal is then reflected from moving interfaces within the body to the receiver crystal in the transducer, amplified and then detected so the audio Doppler shift of that moving interface can be heard audibly or passed via signal pre-processing to the A/D converter for rate calculation. The circuit board has the option of two ultrasound circuits which operated at different frequencies, the operation of each is identical as so only one is described here. The current nominal frequencies are.mhz (.5MHz special order) for US and.8mhz for US. Oscillator and Transmitter output. L forms an oscillator with Q and its associated capacitors producing a sine wave drive at the required frequency. This is fed via a high current output driver Q and output transformer L. Receiver and Detector The reflected Ultrasound signal is fed via a resonant transformer L to the gate of Q, the drain of this FET connects to the source of Q to form a tuned cascode amplifier with L. From the drain of Q the amplitude complex of the received signal is detected by passing the signal through a detector diode D. The raw low frequency heart complex is then amplified and filtered by U where its associated components form a bandpass filter amplifier with a bandwidth of 50Hz to KHz. This signal is passed to the audio section and the signal preprocessing. Audio Amplifier The audio signal then passes to a input selector U5 where the user can select via the front panel which Ultrasound channel will pass to the audio circuits and then to digital gain control U and buffer amplifier U, where the volume setting is determined by the microprocessor subject to the user setting. From here the gain controlled signal is fed to the input of a monolithic power amplifier U7 and from here to the loudspeaker at J. The power rail for U7 is provided by the unregulated 6V fed from D9. Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

26 Ultrasound Technologies Ltd Circuit Description Signal Pre-processing The detected audio complex is fed to U5 a bandpass amplifier where the filter characteristics are arranged to reject signals below 50Hz and above 0Hz, and the output is taken do a digital AGC U. The amplitude stabilised signal is then amplified and full wave rectified by U. This full wave rectified signal is then buffered and smoothed by an active filter. The smoothing is achieved by the low pass active filter having a db at 5Hz hence giving the average value, or power envelope, of the audio complex. This signal is then passed to the A/D converter stage of the cpu U8 for further digital signal processing. Ultrasound Channel Ultrasound is identical in operation to Ultrasound Channel with only a change in component references. Toco Circuit A stabilised 5V is fed to the toco transducer along with 0V which form the excitation of a Whetstone bridge in the transducer. The Differential output of the transducer is fed via a high gain differential amplifier U6 to a low pass filter U for signal smoothing into the A/D converter U further digital signal processing U8. Toco Zero is automatically adjusted by D/A converter U providing an offset voltage into the input of U. Overall gain is adjusted by VR. Event Marker The fetatrack 0 is supplied with a hand held event marker. This is a switch wich when pressed connects an input on the microprocessor U8 to 0V via resistors R0 and R06.. Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

27 Ultrasound Technologies Ltd Circuit Description Microprocessor Circuit The microprocessor circuit is arranged around MC68HC8 (U8) a fast second generation central processing unit (CPU). When power is applied to the circuit a monitor circuit waits for the power rail to become stable and then 00 ms later takes the reset on the CPU high (logic ) to 5 v. This starts the CPU working by reading the bytes at the very top of its memory map from the EPROM (ROM) (U9). This shows the CPU the start position in ROM from which to start executing. This sets up all the peripheral devices, which includes an interrupt timer, starts the system clock which consists of interrupts from the cpu to the watchdog ic at the rate of every millisecond. As all functions are time dependant nothing starts without this clock. The CPU now reads all the preset variables from the battery protected RAM within the real time clock (U). The battery source is a lithium.6 v cell (B) with a nominal life of 0 years. After the CPU has loaded the variables it rums a system check for any internal problems which are reported on the system display. Selection of the individual devices is controlled by cpu internal the chip select circuits. Most analogue signals eventually require digital signal processing for display, chart recording or digital transmission, the signals are presented to CPU, where an internal 8 bit A/D converter with an 8 way multiplexed input converts the signals to digital form. The converter accepts unipolar signals of 0-5 v.. The CPU interfaces with the display and keyboard circuit using on chip peripheral interface, as well as detecting selection of ultrasound and the presence of an Event keypress. Printer Interface A proportion of the micro-circuit is dedicated to printer interface and control, the primary interface circuit contains timers, serial drivers and peripheral drivers. The principal of operation of the printhead and motor drive circuit is as follows : Data is decoded by the software into bit positions within the allowable area of the printhead. This data is then passed in serial form with a clock signal into the printheads serial buffer. The data is latched by a pulse from the cpu via CMOS buffer, this gives added protection in the case of device failure. Data is then burnt onto the printhead by strobes to from the cpu which last less than ms. The data is passed to the Display and Recorder interface board via ribbon cables J6 and J7. Printhead data is buffered on the interface board by U before being passed directly to the printhead. (J) Under normal conditions with the printer OFF there is no supply connected to the printhead or chart motor. Only when printing is requested does the cpu turn on the VDC supply. The cpu also drives the chart recorder stepper motor via the high current microstep interface. The data is again passed to the Display and Recorder interface board via ribbon cables J6 and J7, after first being processed by microstep controller U. The signals generated are turned in to phase data by driver U on the interface board before energising the coils of the motor. (J) Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

28 Ultrasound Technologies Ltd Circuit Description Display The microprocessor calculated rate value is passed as parallel bit values to the display module connected to the Display and Recorder interface board. The display phase can be adjusred by VR to allow for a better viewing angle. Data Storage Chart data is stored within the RAM ( U) when the paper pack runs out. A reflective opto sensor on the recorder module instructs the microprocessor when paper is out and the system will the buffer the data for 0 mins. Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

29 Ultrasound Technologies Ltd Performance Checks Introduction Performance Checks Ultrasound The following sections details tests to ensure that the FETATRACK 0 is operating within specification. These tests may be performed in whole or part, however, if any repairs are carried out to the power supply circuits then it is recommended that the whole test/calibration procedure is undertaken. The test procedures may be performed without removal of the circuit board from the unit. The following procedure is intended to provide a means of determining the functional status of the unit. It should be included as part of a preventive maintenance plan and should be performed on a regular basis. ) Plug the monitor line cord into a grounded receptacle of suitable line voltage and frequency as indicated on the rear panel of the FETATRACK 0. ) Turn monitor on. The green front panel LED will illuminate. ) The display will first show the system selftest followed by the software revision This indicates the instrument is switched on and awaiting inputs. ) Load chart paper to recorder (for assistance see operating instructions) ensure paper is correctly aligned. 5) Depress printer on/off and recorder will run at either, or cm/min dependent on the user preset value. 6) Connect ultrasound transducer to the yellow or blue US sockets on the front panel and increase volume to maximum. 7) Place transducer in palm of hand and gently stroke the back of the hand at a constant rate of about times a second. 8) Check audio volume is present, digital display will display the simulated rate (approx 0 ) and correspond with the data being printed on the chart paper. UA / Toco / Contractions 9) Connect the toco transducer to the grey UA input socket on the front panel and press UA zero to set the baseline (baseline resets to value -> 0 as selected in set up procedure). 0) Apply pressure onto the centre of transducer and check that the toco trace on chart recording increases to %. Remove load and trace will return to baseline. Fetatrack0 Service Manual Issue Page 5 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

30 Ultrasound Technologies Ltd Performance Checks Event Marker ) Connect the hand held remote event marker to the external mark socket. Depress the button once and note that a half arrow is printed on the bottom of FHR recording. Setting up the monitors The mode of operation of the monitor is programmable through the front panel to give a certain amount of customisation. The programming mode is entered by pressing and holding UA Zero while turning the monitor ON. Details of the user programmable options are at the beginning of this manual. Fetatrack0 Service Manual Issue Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

31 Ultrasound Technologies Ltd Drawings The following pages contain drawing data to assist in the service of the product. Parts lists (Bills of material) Circuit Data Assembly Drawings Fetatrack 0 main assembly Fetatrack 0 recorder interface PCB Fetatrack 0 main PCB Fetatrack 0 Ultrasound Transducer Fetatrack 0 Toco Transducer Fetatrack 0 Ultrasound Transducer Control PCB Placement Diagram Ultrasound Circuit Ultrasound Circuit Digital Printer Control and user interface Circuit Power Supplies and Audio Circuit Toco Circuit Front panel PCB Placement Diagram Frontpanel Circuit Fetatrack 0 Recorder Interface board connector Detail Fetatrack 0 V power lead Fetatrack 0 Display module back light wiring Fetatrack 0 Transformer wiring Fetatrack 0 Speaker wiring Fetatrack 0 Event marker input wiring Fetatrack 0 US cable wiring Fetatrack 0 US cable wiring Fetatrack 0 Toco Input Socket Fetatrack 0 US Input Socket Fetatrack 0 US Input Socket Fetatrack 0 Toco cable wiring Fetatrack0 Service Manual Issue Page 7 Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP6 5PS, United Kingdom. T + (0) 9 55 F: + (0) E: ultratec@doppler.co.uk W:

32 Fetatrack 0 Main Assy Part Number Description Quantity Per Fetatrack 0 Main PCB FT0Ms Fetatrack 0 Recorder Interface PCB Foam 0x8x6mm Strips Black Polyethylene Base Unit Casting Fetatrack Top Unit Casting Fetatrack Door Unit Casting Fetatrack Feta 0 Pcb Bracket Drg F0D Feta 0 Printer Bracket Drg F0D Feta 0 Roller Bracket Drg F0D Papertray RHS.-0 DP s/s F0D Papertray LHS.-0 DP s/s F0D Papertray Top.-0 DP s/s F0D Papertray Bottom.-0 DP s/s F0D IC Digital SM (x8) Eprom 7C Connector Socket Redel/ODU Yellow Connector Socket Redel/ODU Blue Connector Socket Redel/ODU Grey Socket Jack 0.5in Pillar Mx M-F Header Straight (0W cut down) Socket Vert SIL w (0w cut down) Socket 6w IDC Cable Assy Ribbon Int Feta0 Drg F0D LCD Backlit for F Fuse 500mA Antisurge 50V Glass T 0mm Transformer Mains (Traceable Product) Loudspeaker in 0W Filter Mains Inlet (Traceable Product) Feet Heavy Duty ABS Battery Lithium /AA.6v Printer Mechanism 08mm Bush Nylon TO Spade Terminal 0.5 RT Angle Screw Security CSK M6x50 St/St Lobe Pin Screw Security Button Hd Mx Pin St/St Label Set Fetetrack 0 Keypad with Green LED Ultrasound Technologies Ltd 006 feta0 main assy Issue ECN Page of

33 Fetatrack 0 Main Assy Part Number Description Quantity Per Wire Eqpt Type AWG White (uom=mtrs) Cable Tie Connector Crimp Terminal.8x0.8mm Crimp Terminal Shrouded 0.5in Eyelet Connector mm Crimps Molex Housing Molex Way Housing Molex Way Housing Molex 6 Way Screw M.5x0 Pan Hd Pozi St/Steel A Washer M.5 Plain St/Steel A Washer M.5 Shakeproof St/Steel A Nut M.5 St/Steel A Washer M.5 Plain St/Steel A Screw Mx5 Pan Hd Pozi St/Steel A Screw Mx8 Pan Hd Pozi St/Steel A Screw Mx6 Pan Hd Pozi St/Steel A Washer M Plain St/Steel A Washer M Internal Shakeproof St/Steel A Nut M Full St/Steel A Screw Mx0 Pan Hd Pozi St/Steel A Screw Mx0 Pan Hd Pozi St/Steel A Screw M.5x0 Pan Hd Pozi St/Steel A Washer M.5 Internal Shakeproof St/Steel A Ultrasound Technologies Ltd 006 feta0 main assy Issue ECN Page of

34 Fetatrack 0 Recorder Interface PCB Part Number Ref Description Quantity Per C,7 Cap Electrolytic 0uF 5V BCC C, Cap Electrolytic Min 00uf 6V 5mm Radial VR Resistor Variable Multi-Turn SM 00K W R9,0,, Resistor MF 00R % R,7 Resistor MF K % R,,,5,6,7,8,9 Resistor MF 0K % R8 Resistor MF K % R Resistor MF 80R % R0 Resistor MF 7K % R Resistor MF 70R % R,6 Resistor MF R 5% C8,9 Cap Cer SM X7R 0nf 50V 0% C,6, Cap Cer SM X7R 00nf 50V 0% C0 Cap Cer SM X7R.7nf 50V 0% U IC Digital SM 7HCT U IC Digital SM J6 Header Straight Way J5 Header Straight Way J Header Straight 8 WayHarwin J Conn Flex Cable Flat.5mm 7 Circuit J Header IDC 6 Way Straight J7,8 Header IDC 0 Way Straight PCB Fetatrack 0 FT0FPs Recorder Interface Ultrasound Technologies Ltd 006 feta0ri pcb Issue ECN Page of

35 Fetatrack 0 Main PCB FT0Ms Part Number Ref Description Quantity Per C0 Cap Electrolytic 0000uF 5V Snap In Panasonic TSUP Series C Cap Electrolytic 000uF 5V Panasonic FC Series C,8 Cap Electrolytic 70uF/0uF 6V Panasonic FA Series C,8 Cap Electrolytic 0uF 5V BCC C,6 Cap Electrolytic 0uF 50V Panasonic FC Series C8,8,9,56 Cap Electrolytic Min 00uf 6V 5mm Radial C,6,5 Cap Electrolytic uf 00V Panasonic FC Series C7,80,60,6 Cap Cer SM Z5U uf 5V +0-80% C,,6,0,,,,9,0,,,,8,,,0,,,5,9,5,5,56,57,6, 6,66,67,7,75,76,8,8,87,90,9,9,9,97,98,00,0,07,09,0,,,5,6,7,0,,,,5,7,8,9,,5,,5,9,50, 5,55,57,6,6,6 Cap Cer SM X7R 00nf 50V 0% C,86 Cap Cer SM X7R 7nf 50V 0% C88 Cap Cer SM X7R nf 50V 0% C9,8,9,,5,6,9,5,6,7,77,78,79,8,7,0, Cap Cer SM X7R 0nf 50V 0% C89 Cap Cer SM X7R.nf 50V 0% C,8,7,6,,7,60,6,69,85, Cap Cer SM COG.0nf 50V 0% C7,5,50,58 Cap Cer SM COG 680pf 50V 0% C8 Cap Cer SM COG 70pf 50V 0% C,6,6,5,55,59 Cap Cer SM COG 0pf 50V 0% C5 Cap Cer SM COG 00pf 50V 0% C Cap Cer SM COG 7pf 50V 0% C0,0 Cap Cer SM COG pf 50V 0% C5 Cap Tant SM 0uf 0V 0% Case B C8,6,9, Cap Tant SM uf 5V 0% Case A C5,,68,7 Cap Tant SM 0.7uf 5V 0% Case A U5 IC Digital SM 7HCT0 SO U8 IC Digital SM 68HC8 (OBSOLETE) U9 IC Digital SM (x8) Eprom 7C56 Ultrasound Technologies Ltd 006 feta0 main pcb Issue ECN 0 Page of 5

36 Fetatrack 0 Main PCB FT0Ms PQ09 Part Number Ref Description Quantity Per U IC Digital SM 656 (56) U IC Digital SM U8,9 IC SM LT076CQ U0 IC TH TO0 LM8T U IC SM DS05E U IC Digital SM MAX0 SO U IC Digital SM MAX59ACUA or AEUA --00 U IC Digital SM MAX SO U IC Analogue SM 06 or 560 SOT U5 IC Analogue SM DGBDY U,,,5,6,6, IC Analogue SM LM SO U7 IC Analog Power Amp SIL9MPF TDA6/N U,7, IC Analogue SM X9C0S SO U0 IC Analogue SM LM6M-.5 SO U9 Socket IC SM W PLCC D0,,, Diode SM 0BQ00 or SS SMB D,,6,7,9,0,,5,7,8,,5 Diode SM BAS6 SOT D, Diode SM BAT5 SOT D8,6,6,7 Diode Zenner SM BZX8C5V SOT D8 Diode Zenner SM BZX8C0 SOT D9 Diode Bridge Pin SIL GBUA Q Transistor SM RFD8P05SM TO5AA Q,6,, Transistor SM BC88B SOT Q Transistor SM FZT75 SOT Q,,,7,8,9 Transistor SM 6 SOT X Crystal.768Hz 85SMX X Crystal SM MHz 86SMX Ultrasound Technologies Ltd 006 feta0 main pcb Issue ECN 0 Page of 5

37 Fetatrack 0 Main PCB FT0Ms PQ09 Part Number Ref Description Quantity Per R00, Resistor MF R % R,5 Resistor MF 0R 5% R98 Resistor MF R % R,6,0,,,58 Resistor MF 0R % R00,, Resistor MF R % R,9,,6,9,7,70,708,0,,,5, Resistor MF 00R % R65 Resistor MF 70R % R,7,7,5,55,75,0,,0,8,9,7,79, Resistor MF K % R5 Resistor MF K % R8,6 Resistor MF K5 % R,9,9,57,77, 79, 80, 8, 0, Resistor MF K % R5,8,9 Resistor MF K7 % R80,8 Resistor MF K % R,7,,50,5,5,55 Resistor MF K7 % R5,0,,,,,5,8,,58,59,60,6,6,7,76,8,85,86,87,97,99,0,0,06,,5,6,6,,5,60,6,6,67,70,7,7,78, Resistor MF 0K % R,8 Resistor MF 5K % R8 Resistor MF 6K % R7,65,7,56,57 Resistor MF K % R7,5,7 Resistor MF 7K % R5,6 Resistor MF 6K % R0,68,,59 Resistor MF 7K % R,6,8,50,5,66 Resistor MF 68K % R,,0,5,9,,,,8,5,67,7,78, 8, 09,,6,7 Resistor MF 00K % R6,6 Resistor MF 80K % R6,77 Resistor MF 0K % R,69,9,5,7,75 Resistor MF 0K % R69 Resistor MF 680K % R6 Resistor MF M % 0805 Ultrasound Technologies Ltd 006 feta0 main pcb Issue ECN 0 Page of 5

38 Fetatrack 0 Main PCB FT0Ms PQ09 Part Number Ref Description Quantity Per R Resistor MF 0M % R Resistor MF K % VR Resistor Variable Multi-Turn SM K W VR Resistor Variable Multi-Turn SM 5K W L0,5 Inductor uh Panasonic ELC L, Inductor L,L5 Inductor Fixed Toco 088 (PN-6X) L,7 Inductor Fixed Toco 08 (PN-A5HM) L,8 Inductor Fixed Toco 08 (PN-08HF) L,6 Inductor Fixed Toco 0876 (PN-09N) J (fit on reverse) Connector Right Angle Way J9 Header Straight Way J, (fit on reverse) Header Straight Way J,, Header Straight 6 Way J6,7 (fit on reverse) Header IDC 0 Way Straight J Connector Socket RSC D 9 way Heatsink Ultratec PFMS Insulating Kit TO0 Silicone Wire Black AWG UL06 (00m Reel) UOM = Mtrs Eyelet Connector mm Screw Mx8 Pan Hd Pozi St/Steel A Screw Mx6 Pan Hd Pozi St/Steel A Washer M Plain St/Steel A Washer M Internal Shakeproof St/Steel A Nut M Full St/Steel A B Battery Lithium /AA.6v Ultrasound Technologies Ltd 006 feta0 main pcb Issue ECN 0 Page of 5

39 Fetatrack 0 Main PCB FT0Ms PQ09 Part Number Ref Description Quantity Per PCB Fetatrack 0 FT0ms Ultrasound Technologies Ltd 006 feta0 main pcb Issue ECN 0 Page 5 of 5

40 F0 Ultrasound Transducer Yellow (Seward) Part Number Description Quantity Per Faceplate Seward Ultrasound Transducer Body White Seward Label FHR US/US F60 Transducer Connector Plug Redel/ODU Yellow Lemo Collett 5.mm Cable 60 Transducer US/US Seward Grey m lengths Crystal Set Seward Transducer consisting of pcs. Pz7 Discs PCB Ultrasound F0 Transducer iss Grommet Extended Black Rubber Small Label Serial Number Series F60 Transducer Cable Tie Ultrasound Technologies Ltd 006 F0 US Trans Issue ECN Page of

41 F0 Toco Transducer Grey (Seward) Part Number Description Quantity Per Probe Cable Clamp PD0 PDD Membrane PVC Seward To-Co Transducer Transducer Body White Seward Faceplate Toco Seward F Toco Button F60 Transducer F60D Toco Clamp Ring F60 Transducer F60D Toco Spring Diaphragm F60 Transducer Toco Adjustment Plate F60 Transducer F60D Toco Beam Assy F60 Transducer (includes hardware) Label UA F60 Toco Transducer Connector Plug Redel/ODU Grey Lemo Collett 5.mm Cable K Tri Pair Toco (Cut to m lenghts) PCB Toco F60 Transducer iss Grommet Extended Black Rubber Small Toco Button Screw F60 Transducer F Screw Mx6 Pan Hd Pozi St/Steel A Screw Mx5 Csk Hd Pozi St/Steel A Screw Mx6 Csk Hd Pozi St/Steel A Label Serial Number Series F60 Transducer

42 F0 Ultrasound Transducer Blue (Seward) Part Number Description Quantity Per Faceplate Seward Ultrasound Transducer Body White Seward Label FHR US/US F60 Transducer Connector Plug Redel/ODU Blue Lemo Collett 5.mm Cable 60 Transducer US/US Seward Grey m lengths Crystal Set Seward Transducer consisting of pcs. Pz7 Discs PCB Ultrasound F0 Transducer iss Grommet Extended Black Rubber Small Label Serial Number Series F60 Transducer Cable Tie Ultrasound Technologies Ltd 006 F0 US Trans Issue ECN Page of

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44 A B C D C7 680pF C 7pF C5 680pF A B C D R6 80K C5 00pF BAT5 D R79 k MMBF6 Q L 08 D D S G D MMBF6 Q MMBF6 Q R R L G S R8 K5 L 08 R K C6 0pF C7 D BZX8C5V D5 BZX8C5V R9 K G S K0 R + C5 0u7F K0 R7 + C 0u7F R7 K0 J 5 6 R 68K R6 68K R8 70R R5 6K 8 7 VCC INC U/D CS U VSS VH VW VL X9C0 5 6 L BAS6 D7 D8 BZX8C5V D BAS6 D BAS6 R K7 R7 K R8 68K R0 7K C 7nF R 0K I- I+ LMM U 6 I- 5 I+ LMM U 7 U LMM I- I+ +V I- +V 9 U I- +V 8 U5 LMM I- LMM 0 I+ LMM I+ C9 0nF I+ negv negv U5 C9 0nF C8 0nF R78 0K C9 0nF C 0nF C5 0nF C6 0nF +V +V BAS6 D6 6 U I- I- 5 I+ LMM 7 I+ LMM U +V I- I+ LMM U +V 9 I- 0 I+ LMM U 8 R 0K R0 0K R 0K R 0K R 0K R5 0K R9 00R R8 0K R 0R R0 00K 00R R 00R R6 R6 0R R5 0K R 00R R5 00K R9 00K R 00K R 00K R 00K Vrf Q5 +V BC88B BC88B Q B E C C C C E C nf B R7 7K + C 00uF C8 C0 00uF + C9 C8 00uF + C0 C C C8 nf R77 7K C7 nf C6 nf C nf USTx USTx RxSig Tdr_Sense_US Ultrasound Transducer connection.mhz Transmitter / Receiver Vrf +V negv +V negv FH_Audio {0} +V negv INC {0,0,0} U/D {0,0,0} CS_Agc_US {0} negv AGC RxSig C 0pF C6 C negv negv uf C7 negv negv Average value circuit Fetal_Complex_FH {0} Tdr_Sense_US US_connected {0} +V C0 C C0 C C C C C Issue ECN 88 Date May 00 June 00 Mar 0 negv Ultrasound Technologies Ltd Copyright ultratec 00 Lodge Way Portskewett, Caldicot South Wales. NP6 5PS. UK PFMR Ultrasound Circuit Drawn: NAS Drg No: Date: Name: FT0M~ Sheet of 5

45 A B C D C58 680pF C50 680pF A B C D BAT5 D R8 k R6 80K C8 70pF Q9 MMBF6 D S G L7 08 D D MMBF6 Q8 MMBF6 Q7 R5 R L R6 K5 L8 08 R9 K C59 0pF C70 D BZX8C5V D BZX8C5V G R57 K S G S K0 R5 + C68 0u7F K0 R55 + C7 0u7F R75 K0 J 5 R56 70R R6 6K 8 7 VCC INC U/D CS U7 VSS VH VW VL X9C R50 68K R5 68K L BAS6 D5 D6 BZX8C5V D9 BAS6 D0 BAS6 R7 K7 R65 K R66 68K R68 7K C86 7nF R69 0K U I- FH_Audio {0} LMM C87 INC {0,0,0} I+ U/D {0,0,0} +V +V 9 U 9 I- I- +V 8 U5 LMM 6 I- LMM 7 0 I+ LMM 0 I+ C8 0nF 5 I+ negv negv U5 8 I- I+ LMM U 6 I- 5 I+ LMM U 7 C7 0nF C6 0nF R8 0K C5 0nF C77 0nF C78 0nF C79 0nF +V +V BAS6 D U6 6 I- I- I+ LMM negv 5 I+ LMM U6 7 +V 9 I- 0 I+ LMM negv U6 8 +V I- I+ LMM U6 R60 0K R58 0K R59 0K R6 0K R6 0K R7 0K R7 00R R76 0K R0 0R 00R R70 00R R7 R8 00K R 0R R 0K R9 00R R5 00K R67 00K R7 00K Vrf Q0 +V BC88B BC88B Q6 B E C C C E C7 nf B R5 7K C55 0pF + C65 00uF C7 C7 00uF + C8 00uF + C8 C5 R 00K R 00K C8 C75 C6 nf R80 7K C5 0pF C60 nf C69 nf C85 nf USTx USTx RxSig.8MHz Transmitter / Receiver Vrf +V +V +V negv CS_Agc_US {0} negv AGC Tdr_Sense_US Ultrasound Transducer connection negv negv RxSig C6 0pF C9 C76 negv uf C80 negv Average value circuit Fetal_Complex_FH {0} Tdr_Sense_US US_connected {0} +V C5 C56 C6 C66 C5 C57 C6 C67 Issue ECN 88 Date May 00 June 00 Mar 0 negv Ultrasound Technologies Ltd Copyright ultratec 00 Lodge Way Portskewett, Caldicot South Wales. NP6 5PS. UK PFMR Ultrasound Circuit Drawn: NAS Drg No: Date: Name: FT0M~ Sheet of 5

46 C D C0 C05 C07 C09 C0 C C C C5 C6 C7 P P MotorPhaseZero P P DA 6 5 P6 P5 DA 8 7 P8 P7 Serial_Out 0 9 P0 P9 Serial_Clock 0K 0K 0K 0K 0K P P printheadstrobe R06 R0 R0 R99 R97 P P printheadstrobe A[0:6] 6 5 P6 P5 printheadstrobe U A[0] P8 P7 printheadstrobe Key[] PT0 A0 D[0:7] A[] P0 P9 printheadlatch Key[] PT A 07 5 A[] Key[] PT A J A[] Key[] PT A paperout A[] Key[5] PT A 0 57 A[5] Toco_Adjust_Clock {05} PT5 A5 U 58 A[6] Toco_Adjust_Data {05} PT6 A6 U9 A[0] 0 D[0] A0 D0 59 A[7] CS_Agc_US {0} PT7 A7 A[0] D[0] A[] 9 D[] A0 O0 A D 60 A[8] 97 A8 A[] 0 D[] A[] 8 D[] P P DisplayData[0] Rx_Data RXD0 A O A D 6 A[9] 98 A9 A[] 9 5 D[] A[] 7 5 D[] P P DisplayData[] Tx_data TXD0 A O A D 6 A[0] A0 A[] 8 8 D[] A[] 6 6 D[] P6 P5 DisplayData[] Rx_Data_Aux RXD A O A D 6 A[] A A[] 7 9 D[] A[5] 5 7 D[5] P8 P7 DisplayData[] Tx_Data_Aux TXD A O A5 D5 6 A[] A A[5] 6 0 D[5] A[6] 8 D[6] P0 P9 DisplayData[] Serial_In SDI/MISO A5 O5 A6 D6 65 A[] 0 A A[6] 5 D[6] A[7] 9 D[7] P P DisplayData[5] Serial_Out SDO/MOSI A6 O6 A7 D7 66 A[] 0 A A[7] D[7] A[8] 5 P P DisplayData[6] Serial_Clock SCK A7 O7 A8 67 A[5] A5 A[8] 9 A[9] P6 P5 DisplayData[7] RTC_Select SS A8 A9 A[6] 8 7 A6 A[9] 8 A[0] P8 P7 DS A9 A0 0 9 A7 INC {0,0,0} A[0] A[] P0 P9 DS printheadstrobe PJ0 A0 A A8 U/D {0,0,0} A[] 7 A[] printheadstrobe PJ A A J6 6 5 A9 CS_Agc_US {0} A[] A[] 6 printheadstrobe PJ A A 7 6 A0 CS_Volume {0} A[] 0 A[] printheadstrobe PJ A A A CS_Toco_Adjust {05} A[] printheadlatch PJ A 8 0 PJ5 CS J8 9 CE 7 unconnected spare MotorPhaseZero PJ6 WE 8 D[0] 5 0 D0 OE MotorPhaseZero PJ7 OE C9 9 D[] D U VPP 75 0 D[] DisplayData[0] PH0 D HM656 V+ C+ 76 D[] 756PLC C97 DisplayData[] PH D 77 D[] DisplayData[] PH D 6 V- C- 78 D[5] DisplayData[] PH D5 C9 8 D[6] C+ DisplayData[] PH D6 C D[7] DisplayData[5] PH5 D7 8 C- DisplayData[6] PH6 9 Pin D-Type Socket 8 DisplayData[7] PH7 7 CSP RS_Tx 7 Tout Tin Tx_data CSP0 RS_Rx DS PD0 7 Tout Tin Tx_Data_Aux CSD DS PD 7 CS Rin Rout Rx_Data_Aux PrintVoltageOn/Off {0} PD CS Rin Rout Rx_Data KeyOut PD 69 CS aux_signal_control PD 68 debug MAX0E R87 CS0 CSmotordrive 5 J0 J 0K US_audio {0} PD5 RS 6 EXTAL US_audio {0} PD6 C nf C0 alarm {0} PD7 BKGD/_TAGHI debug X C89 pf R reset 0 nf RESET reset 0M KHz 87 6 US_connected {0} AN EXTAL EXTAL R8 XTAL U K C0 US_connected {0} AN XTAL XTAL pf Debug Control 0 89 Toco_connected {05} AN XFC Aux_connection AN ARST VBat n/c Fetal_Complex_FH {0} AN5 IPIPE/MODB B 8 X PF 9 9 R R8 R5 R6 KHz Fetal_Complex_FH {0} AN6 IPIPE0/MODA Aux RS BATT 0K 0K 0K 0K V n/c if paperout AN7 ECLK X AN8 LSTRB/TAGLO X SDO Serial_In +V 8 R/_W 5 N/C SDI Serial_Out 7 85 IRQ VRH 6 INT0 SCLK Serial_Clock 86 XIRQ VRL Aux_connection n/c n/c aux_signal_control INT CE RTC_Select MC68HC8A 0 Gnd sermode R86 D[0] negv DS05E VDD D0 0K D[] D D[] D Sign SIGN 0 D[] Aux Signal Connection D D[] D 8 D[5] Sign SIGN D5 D[6] D6 00K R C D A B A B R98 5K IN OUT ZM06Z 7HCT0D 7HCT0D U5 5 6 CS_Toco_Adjust {05} Toco_A/D_CS {05} 7HCT0D U5 C00 J9 5 9 NC DA 7 Vss WR CS Reset Vref 6 0 NJU96E U C8 u0f 9 8 7HCT0D U5 0 7HCT0D U5 7HCT0D R K0 J J5 Key[] Key[] Key[] Key[] Key[5] KeyOut Sign Sign MotorPhaseZero reset D[7] R85 D7 DA DA U 0K U5 U5 AO A[0] D7 BAS6 R0 K0 Issue ECN Date May 00 June Mar 0 eng Oct 0 Ultrasound Technologies Ltd Lodge Way Copyright Portskewett, Caldicot ultratec 00 South Wales. NP6 5PS. UK Drawn: NAS Drg No: Date: Name: FT0M~ Sheet of D8 BAS6 DA reset CSmotordrive R0 00R R08 00R reset Event Marker Motor Control Digital Printer Control and user interface

47 A B C D AC Power Input GBUA Q RFD8P05SM C9 uf U0 LM8T Vin Vout Adj C uf VR K R R R00 R C uf 00V + Q FZT A B C D R8 5K B C E uf 00V + C6 uf 00V + C5 D7 BZX8C6V D8 BZX8C6V U5 L 00uH 6 IN IN 5 D D S S +V V- V+ negv 5 Gnd VL 6 FH_Audio {0} S S FH_Audio {0} 0 7 D D 9 US_audio {0} 8 IN IN L 00uH U8 LT076CQ 5 VIN VSW GND VC FB U9 LT076CQ 5 VIN VSW + C 0uF DG GND VC FB R5 k + C8 0uF C6 u0f + 0BQ00 D 0BQ00 D D 0BQ00 D0 0BQ00 + C 0uF R5 K7 R9 K7 + C8 0uF C 000uF + C6 0uF 9 IN C 0uF U7 G S D J AC AC DC+ TDA6 8 IN- DC- C0 0,000uF R 00K R6 00K R 00R +V J D9 R0 K0 R7 K C C8 L0 uh C9 C7 0nF R0 K C5 R 0K C50 C 6 J R8 K7 L5 uh C9 C7 8 7 VCC INC U/D CS U VSS VH VW VL X9C K R I- I+ LMM negv U 0K R9 C5 C0 0nF R K R K7 R6 0K R 0K BC88B Q B C BC88B Q PrintVoltageOn/Off {0} B C E E +V US_audio {0} C9 00uF + 00R R C0 R 0K C C R 0R 0uF C5 + C5 C C nf R7 7K C5 INC {0,0,0} U/D {0,0,0} CS_Volume {0} +V alarm {0} +V A Speaker negv 9 I- U6 R80 k R8 k 0 I+ LMM 8 Issue ECN 88 eng Date May 00 June 00 Mar 0 Oct 0 negv Ultrasound Technologies Ltd Copyright ultratec 00 Lodge Way Portskewett, Caldicot South Wales. NP6 5PS. UK Power supplies and Audio circuit Drawn: NAS Drg No: Date: Name: FT0M~ Sheet of 5

48 A B C D D6 BZX8C5V U 8 VDD SCLK Toco_Adjust_Clock {0} 7 AIN CS Toco_A/D_CS {0} 6 A/DOff SHDN DOUT Toco_Adjust_Data {0} 5 REF GND U U0.5V VP 5 R LM6M MAX59 Toco_Adjust_Clock {0} A B C D 8 R70 00K VR 5K M R6 K0 R8 K0 R9 GND VDD OUTA REF 6 CS OUTB DIN SCLK VM 7 LMM 5 I+ R6 0K 680K R69 R77 0K J 6 I- U K R5 R65 70R D BAS6 D5 BAS6 R59 7K R55 K7 R57 K R5 K7 R75 0K R50 K7 R5 K7 K R56 0K R7 5 I+ LMM I- U6 7 +V +V U6 C9 I- MAX U LMM I- 9 U I+ LMM I- Adc 8 I+ LMM 0 negv I+ K0 C6 Toco_VRef uf R79 negv LMM I+ negv Toco_VRef 6 I- U R7 0K R68 0K R7 0K R78 0K R60 0K R6 0K R58 0R +V C55 + C56 00uF negv C90 0K R7 R6 0K R67 0K R76 0K R5 0K R5 00R R7 00K C6 C6 +Exe Toco Connector -Exe +Return -Return +V +V negv C6 toco_complex CS_Toco_Adjust {0} Toco_Adjust_Data {0} C57 C60 uf +V negv Auto Zero Control +V Toco_connected {0} C58 C59 negv Issue ECN Date May 00 June Mar 0 Ultrasound Technologies Ltd Copyright ultratec 00 Lodge Way Portskewett, Caldicot South Wales. NP6 5PS. UK PFMR Toco Circuit Drawn: RN Drg No: Date: Name: FT0M~ Sheet 5 of 5

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50 A B C D J C C C5 J5 J6 P P P P 5 6 P5 P6 7 8 P7 P8 9 P9 P0 P P P P 5 6 P5 P6 J J VR 50K J R0 7K R 80R R R R R R5 R MA MB MA MB E 0 VMM C R6 R E 5 VMM C RC Gnd Gnd P 9 P9 P0 P P P P 5 6 P5 P6 7 8 P7 P8 9 P9 J7 P 9 P9 P0 P P P P 5 6 P5 P6 7 8 P7 P8 9 P9 J8 P P0 P P0 P P 5 6 P5 P6 7 8 P7 P8 P P 5 6 P5 P6 7 8 P7 P A B C D R8 K C0 700pf Phase Phase Gnd U NJM777 Dis Dis VR VR Gnd C 0uF + C 00uF 8 Y 7 Y 6 Y 5 Y Y5 Y6 Y7 Y8 U A A A A A5 A6 A7 A C6 + C7 0uF R K0 R7 K0 +V R 70R Key[] Key[] Key[] Key[] Key[5] KeyOut Power connection R9 R0 R R 00R R0 00R R 00R R 00R LCD Backlight Key[] Key[] Key[] Key[] Key[5] KeyOut Sign Front Panel Key Pad Interface Sign MotorPhaseZero Printhead interface DS DS DisplayData[0] DisplayData[] DisplayData[] DisplayData[] DisplayData[] DisplayData[5] DisplayData[6] DisplayData[7] Front Panel Display Interface +V LCD contrast control R 0K paperout R 0K R 0K Motor Drive Output R5 0K R6 0K R7 0K R8 0K R9 0K +V Serial_Out Serial_Clock printheadstrobe printheadstrobe printheadstrobe printheadstrobe printheadlatch C8 0nF C9 0nF C C MotorPhaseZero DA DA Serial_Out Serial_Clock printheadstrobe printheadstrobe printheadstrobe printheadstrobe printheadlatch Sign Sign MotorPhaseZero paperout MotorPhaseZero DA DA DisplayData[0] DisplayData[] DisplayData[] DisplayData[] DisplayData[] DisplayData[5] DisplayData[6] DisplayData[7] DS DS G 9 G ACT5 Issue ECN Date eng Oct 0 Ultrasound Technologies Ltd Copyright ultratec 00 Lodge Way Portskewett, Caldicot South Wales. NP6 5PS. UK Fetatrack 0 recorder interface board Drawn: NAS Drg No: Date: Name: FT0F~ Sheet of

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53 Ultrasound Technologies Service Engineer Guide Document contains information of signals at key points throughout the specified product. Fetatrack 0 The following images are oscilloscope snap shots of signals acquired from the Fetatrack 0 main PCB and correspond to the Fetatrack 0 Power Supplies and Audio Circuit diagram. Note: images of digital signals that are directly linked to the microprocessor can be found on the oscilloscope image document related to the Fetatrack 0 digital central processor diagram. J pin AC power input J pin AC power input D9 pin, DC supply rail. Pin = GND

54 Q gate, Unit not printing Q gate Unit printing Q drain Unit not printing Q drain Unit printing U0 pin Unit not printing U0 pin Unit printing

55 U0 pin Unit not printing U0 pin Unit printing Q base Unit not printing Q base Unit printing Q collector Unit not printing Q collector Unit printing

56 Q collector Unit not printing Q collector Unit printing U8 pin U8 pin U8 pin U8 pin 5

57 L pin, VCC U9 pin U9 pin U9 pin U9 pin 5

58 L pin + 5V Supply Rail D pin, D pin Junction L5 pin

59 Q Collector Q Base Q Emitter - 5V Supply Rail

60 U5 Pins 0 & 7 Image captured whilst stroking US transducer U5 Pins 0 & 7 Image captured whilst stroking US transducer U5 Pins 0 & 7 Image captured whilst stroking US & US transducers simultaneously.

61 U Pin Image captured whilst stroking US transducer. Use with US transducer will result in an equivalent signal. U Pin 5 Image captured whilst stroking US transducer. Use with US transducer will result in an equivalent signal. U Pin Image captured whilst stroking US transducer. Use with US transducer will result in an equivalent signal. U Pin Image captured whilst stroking US transducer. Use with US transducer will result in an equivalent signal.

62 U7 Pin 9 DC level with super imposed audio signal. Audio signal level very low. U7 Pin 9 DC level with superimposed audio signal Audio signal very low. (zoomed in image of audio signal) U7 Pin 6 DC level with superimposed audio signal. Audio signal of audible amplitude.

63 Ultrasound Technologies Service Engineer Guide Document contains information of signals at key points throughout the specified product. Fetatrack 0 The following images are oscilloscope snap shots of signals acquired from the Fetatrack 0 main PCB and correspond to the Fetatrack 0 Ultrasound Circuit diagram. This document also applies to the two Ultrasound circuits. The service engineer should allow for signal differences on the transmit side of the circuit as US & US transmit signals of different frequencies and amplitude. Note: images of digital signals that are directly linked to the microprocessor can be found on the oscilloscope image document related to the Fetatrack 0 digital central processor diagram. Transmitter circuit U6 pin + 5V supply rail Transmitter circuit U6 pin + 0V ( Vrf ) Supply rail Transmitter circuit Q Drain ( pin ) Transmitter circuit Q Source ( pin )

64 Transmitter circuit Q Base ( Pin ) Transmitter circuit Q Collector ( Pin ) Transmitter circuit Q Emitter ( Pin ) Transmitter circuit L Pin ( Vrf ) 0V Supply rail Transmitter circuit L Pin Transmitter circuit L Pin Transmit signal ( USTx ).Mhz for US.8Mhz for US

65 Receiver Circuit L Pin ( RxSig ) Receiver circuit L Pin, ( Q gate ) Receiver Circuit Q Drain Receiver Circuit Q Source Receiver Circuit Q Drain Receiver Circuit Q Gate

66 Receiver Circuit D Pin At high sensitivity, variation in DC level can be observed when stroking transducer. Receiver Circuit U pin Stroking Transducer Receiver Circuit U pin Stroking Transducer Receiver Circuit U Pin Stroking Transducer Receiver Circuit U Pin 6 Stroking Transducer Receiver Circuit U Pin 5 Stroking Transducer

67 Receiver Circuit U Pin 7 Stroking Transducer Receiver Circuit U Pin 9 Stroking transducer, but viewing very little response Receiver circuit U pin 8 Stroking transducer Receiver Circuit U Pin Stroking Transducer, but viewing very little response Receiver circuit U Pin ( FH_Audio ) Stroking Transducer Receiver Circuit U5 Pin Stroking Transducer, but viewing very little response

68 Receiver circuit U5 Pin Stroking Transducer Receiver Circuit U5 Pin Stroking Transducer Receiver Circuit U5 Pin Stroking Transducer Receiver Circuit U5 Pin Stroking Transducer Receiver Circuit U Pin 6 Stroking transducer, but viewing very little response Receiver Circuit U Pin 7 Not stroking Transducer

69 Receiver Circuit U Pin 7 Stroking Transducer Receiver Circuit U Pin Stroking Transducer Receiver Circuit U Pin Stroking Transducer Receiver Circuit U Pin Stroking Transducer Receiver Circuit U Pin Stroking Transducer, but viewing very little response Receiver Circuit U Pin Stroking Transducer