Huntleigh Baby DOPPLEX 4000 Service Manual Download Page 26 | Manualshive

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6.3

BD4000 Power Supply Section

Universal Switch Mode PSU

, converts standard international mains power down to +5

and +/-12Vdc.

Boost Regulator

, situated on the main board, this converts the +12V to +26V for use by

the print head and stepper motor.

Low Noise Regulator

, a low noise +/- 10V is also produced to power the ultrasound

transducer, anti aliasing filter and automatic gain control circuitry.

Issue: 2 DRAFT

21

Rev: a

614365

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Summary of Contents for Baby DOPPLEX 4000

Page 1: ...reproduced in part or in whole without written consent Huntleigh Diagnostics Ltd products are subject to continuous development and consequently may incorporate minor changes from the information con...

Page 2: ...al Testing 7 3 1 BD4000 BD4002 Main Unit 7 3 2 Ultrasound Transducers 7 3 3 Toco 8 3 4 FECG Functional Testing 9 3 5 Twins Functional Testing BD4000 9 3 6 Twins Functional Testing BD4002 11 4 Specific...

Page 3: ...ions 35 9 1 What is Static Electricity 35 9 2 Protective Measures 35 10 Servicing Procedures Main Unit 36 10 1 Torque Settings 36 10 2 Unit Dismantling 37 10 3 Unit Reassembly 37 10 4 Display Front Pa...

Page 4: ...val 47 10 30 Front Panel Connector Assembly refitting 47 10 31 Toco Ultrasound Transducer Dismantling 47 10 32 Reassembly of Toco Ultrasound Transducer 48 10 33 Strain Gauge Assembly Removal 48 10 34...

Page 5: ...15 1 Appendix A 72 15 2 Appendix B 73 iv Issue 2 Draft Rev a 614365...

Page 6: ...or further details 1 3 Product Description General The Baby Dopplex 4000 and Baby Dopplex 4002 comprise a main unit which can be either free standing trolley or wall mounted two transducers US and Toc...

Page 7: ...id damage to the circuitry Static damage may not be immediately evident but could cause premature failure The Baby Dopplex must only be dismantled and serviced within an ESD protected area EPA as defi...

Page 8: ...h Bonding Test points a Test the exposed chassis accessible through the moulding apertures on the underside of the unit b Test the metal shroud of the toco socket c Test the shells of the rear panel D...

Page 9: ...Of Medical Equipment The following safety summary should be read before operating or carrying out any of the procedures described in this manual 4 Issue 2 Draft Rev a 614365 Caution Do not apply test...

Page 10: ...the connector Do not allow any fluid to seep into the transducer Dry thoroughly before use Belts These may be hand washed at 40o C max using a mild detergent solution Rinse with clean water and dry th...

Page 11: ...r the correct setting of controls which may have been altered during maintenance No attempt should be made to service the unit unless adequate workshop facilities and suitable staff are available 2 6...

Page 12: ...ng Press the patient event marker switch and observe the arrow at the bottom of the printout Press the clinical event marker on the display panel and an arrow should appear at the top of the printout...

Page 13: ...the toco transducer steady flex the cable at the transducer and plug ends Check the UA loading display and printout to ensure that there is no deviation from the zero line Depress the toco rubber boo...

Page 14: ...plied with the twins kit The monitor with the cable end marked 1 causes the unit to be the LOCAL unit while the other unit defaults to REMOTE The display on the LOCAL BD4000 should display Remote FHR...

Page 15: ...10 Issue 2 Draft Rev a 614365 150mm paper normal 210mm paper wide...

Page 16: ...ansducer can be used at any one time and should be tested as detailed in section 3 4 When full width paper 210mm is loaded the unit will print two FHR grids one above the other and one toco trace With...

Page 17: ...io Power 1 Watt max Ultrasound Transducer Transmitter frequency US1 1 5MHz 1 Acoustic Output Under the requirements laid down in IEC1157 1992 the peak negative acoustic pressure does not exceed 1MPa t...

Page 18: ...gress Degree of Safety in PresenceNot suitable for use in the presence of of Flammable Gases flammable gases Mode of Operation Continuous Performance FHR Range US 50 to 210 BPM FECG 30 to 240 BPM FHR...

Page 19: ...ch is proportional to the fetal heart velocity 5 2 Doppler Audio Processing The Baby Dopplex ultrasound transducer contains a transmitter and receiver In use the transducer sends out a pulsed ultrason...

Page 20: ...makes a direct connection to the fetal scalp and provides more reliable tracking of the fetal heart rate during the later stages of labour The FECG transducer incorporates an isolation amplifier whic...

Page 21: ...6 BD4000 overview The BD4000 has been split up into several sections as shown below for clarity 16 Issue 2 Draft Rev a 614365...

Page 22: ...ront panel see user manual Serial Ports the rear connector PCB supports two D type RS232 connectors for external interfacing and twins mode communication Display PCB is mounted on the top half of the...

Page 23: ...rogram from EPROM to the DSP s internal RAM when the unit is reset EEPROM used for storage of user setup information when the unit is switched off Twins Detect a link in the cable sets the monitor to...

Page 24: ...first amplified before being fed to the ultrasound transducer and the rear connector PCB The timing logic controlled by the micro sets the ultrasound transmit timing and fully synchronises the system...

Page 25: ...oses the relevant analogue switches depending on the mode selected to route the appropriate signals through to the A D converters A similar system is used to detect IUP Toco transducers Toco IUP Input...

Page 26: ...to 5 and 12Vdc Boost Regulator situated on the main board this converts the 12V to 26V for use by the print head and stepper motor Low Noise Regulator a low noise 10V is also produced to power the ult...

Page 27: ...monitor prints and with ambient temperature Strobe width is adjusted to regulate print density Stepper Motor Driver processes the information from the data bus and converts this to a form acceptable...

Page 28: ...he unit into twins mode LOCAL The BD4000 connected to the other end of the twins cable becomes the REMOTE unit Synchronisation signals synchronises the two ultrasound transducers when connected in twi...

Page 29: ...esses the information from the LCD Controller and data bus for the Display LCD Display 32 character display showing system setup and other information Keypad Matrix this interface enables the user to...

Page 30: ...7 BD4002 overview The BD4002 has been split up into several sections as shown below for clarity Issue 2 DRAFT 25 Rev a 614365...

Page 31: ...type RS232 connectors for external interfacing Display PCB is mounted on the top half of the case moulding and consists of two separate PCBs joined by a short ribbon cable This also carries the syste...

Page 32: ...ing Logic the master oscillator for the ultrasound system is also located on the main PCB analogue section This 1 5MHz carrier is first amplified before being fed to the ultrasound transducers FECG th...

Page 33: ...s through to the A D converters Probe Detect detects the presence of one or two US FECG transducers allowing the micro to monitor the correct channels as required Toco IUP Input a differential amplifi...

Page 34: ...ternational mains power down to 5 and 12Vdc Boost Regulator situated on the main board this converts the 12V to 26V for use by the print head and stepper motor Low Noise Regulator a low noise 10V is a...

Page 35: ...monitor prints and with ambient temperature Strobe width is adjusted to regulate print density Stepper Motor Driver processes the information from the data bus and converts this to a form acceptable...

Page 36: ...by the RS232 IC Level Converter this converts the data from the DUART into RS232 voltage levels The RS232 link allows data to be passed from and to an external device via the rear panel D type connec...

Page 37: ...sses the information from the LCD Controller and data bus for the Display LCD Display 32 character display showing system setup and other information Keypad Matrix this interface enables the user to s...

Page 38: ...ming logic section Range Gate Switching the signal from the ultrasound head is selected by the range gating section to ensure that the receiver circuitry is not enabled during the transmit period this...

Page 39: ...Amplifier to maintain patient safety should an electrical fault occur an isolation amplifier is used as a barrier to avoid excess leakage through to the patient Power Supply this is used to provide a...

Page 40: ...he siganl recieved from the IUP pressure transducer and is fed to the driver for transfer over the opto isolated barrier via the opto coupler The second amplifier provides an amplified signal with dif...

Page 41: ...sily and is only felt by us when we discharge the built up charge rapidly by touching a grounded object such as a grounded door handle The voltages felt by us are as high as 3kV but only 20V is necess...

Page 42: ...ssemblies are adhered to Failure to torque fixing screws correctly may result in damage requiring case replacement and may affect reliability The torque setting are detailed in the relevant procedure...

Page 43: ...le and safety earths are fitted locate top case over speaker and front panel alignment guides 2 Invert unit and refit 5 securing screws and tighten to 45cNm 10 4 Display Front Panel Switch PCBs Remova...

Page 44: ...be pushed through case moulding cut out and the label removed 10 7 Refitting Display PCB Metalwork 1 With case top uppermost place metalwork in cut out 2 Turn case top over fit metal washers earth lea...

Page 45: ...cNm and fit shakeproof washer under earthing point nut 2 Replace all connectors as above 10 10Print Head Removal 1 Remove print head connector taking care not to short pins Pull out paper tray remove...

Page 46: ...d mounting plate are free to slide up and down spacers 5 Place print head assembly over mounting pillars and screws Align print head as detailed in 7 12 10 12Print Head Alignment Procedure 1 With prin...

Page 47: ...tor mounting plate screws and remove mounting plate 10 14Stepper Motor Refitting 1 Fit Stepper motor to mounting plate passing gear through mounting bracket noting cable orientation and tighten screws...

Page 48: ...e power supply 10 17Mains Inlet Removal 1 Remove Power Supply Unit connectors 2 Remove cable ties and disconnect safety earth 3 Remove Power Supply Unit to mains inlet wiring 10 18Mains Inlet Refittin...

Page 49: ...tting 1 Refitting is reversal of removal tighten screws and nuts to 35cNm 10 21Rear Panel Connector PCB Removal 1 Remove rear panel ribbon cable from main PCB 2 Remove 2 PCB retaining screws 10 22Rear...

Page 50: ...r tray fully closed adjust microswitch position to register paper tray closed 3 Pull the left hand side of the paper tray gently the unit may display Paper tray open briefly as the paper tray is held...

Page 51: ...tep 5 and align print head as detailed in 7 12 10 27Paper Width Microswitch Removal 1 Remove main PCB as detailed in section 7 8 Remove 2 securing nuts washer and lift switch clear of assembly 10 28Pa...

Page 52: ...fitted correctly 2 Fit transducer top and tighten screws to 20 cNm Replace label F Water resistance of US transducers can only be ensured if the units are returned to Huntleigh Diagnostics for refurbi...

Page 53: ...e case top as detailed in 10 31 2 Set up power supply voltage to 5 00Vd c 0 05V 3 Connect transducer to power supply and DVM as shown in table above 4 Turn transducer so that strain gauge is uppermost...

Page 54: ...and link B intact Replace Zero resistor with new value as required to bring the offset within specification If offset negative check link A is intact and link B is cut Repair cut link with tinned copp...

Page 55: ...ransducer Cable 1 Remove case top as detailed in 10 31 and desolder cable from PCB 2 Unscrew back of metal plug and pull insert free Desolder wires and remove plug from cable 3 Fit plug shroud to cabl...

Page 56: ...nt of the cable 10 37FECG Transducer Servicing Contact Huntleigh Diagnostics Service Department for further information on servicing the FECG transducer Issue 2 DRAFT 51 Rev a 614365 Pin Number Toco U...

Page 57: ...nnel selected if two transducers fitted Not printing paper driven Paper wrong way up Refit paper pack ensuring that the shiny side is uppermost this sensitive side can be easily marked with a fingerna...

Page 58: ...No Description Comment 1 PCB S No date of manufacture Factory preset 2 Software version Factory preset 3 Language 1 English Scale 20 beats cm grid on Chart 3cm min Mode internal use only User selecta...

Page 59: ...returns to normal use Further diagnostic settings can be set as follows d Turn unit on and press setup key 1 e Press printer and button 3 simultaneously f Press button 3 until code 14 is displayed Th...

Page 60: ...Bed number During normal operation the bed number is printed alongside the Huntleigh Diagnostics footnote This can be changed as detailed in 8 3 11 6 Real time clock battery The real time clock batte...

Page 61: ...pare parts can be ordered from your dealer or direct from Huntleigh Diagnostics using the part numbers shown overleaf 12 1 Recommended Spare Parts Recommended spare parts are marked with a bold part n...

Page 62: ...SHER M3 WASHER M3 WASHER 55 M3 WASHER N M3 WASHER N M3 WASHER NYLON 60 614386 DISPLAY PANEL LABEL 70 614387 REAR PANEL LABEL 80 614389 DISPLAY PANEL METALWORK 90 BS 7 5 32 BS 7 5 32 SPACER 100 BS 10 5...

Page 63: ...2 Draft Rev a 614365 340 200 15 120 4 340 Huntleigh DIAGNOSTICS 35 Portmanmoor Road Cardiff CF2 2HB MADE IN UK Tel 44 0 1222 485885 Fax 44 0 1222 492520 MODEL No SERIAL No geprufte sicherheit Huntleig...

Page 64: ...NG 20 614393 CHASSIS ASSEMBLY 70 614394 PRINTER MOTOR ASSY 90 614395 END OF PAPER ASSY 150 WN1412 KB30 8 SELF TAPPING SCREW 155 M3 WASHER S M3 WASHER SHAKEPROOF 160 M3X8 POZI PAN M3X8 SCREW 165 M3 WAS...

Page 65: ...ASSY 105 614421 614421 SPEAKER ASSY 130 WN1412 KB30 10 WN1412 KB30 10 SELF TAPPING SCREW 160 M3X8 POZI PAN M3X8 POZI PAN M3X8 POZIPAN 165 M3 WASHER S M3 WASHER S M3 WASHER SHAKE 170 M3 WASHER M3 WASH...

Page 66: ...WASHER S M3 WASHER SHAKEPROOF 175 M3 NYLOC M3 NYLOC M3 NUT 180 BS 06 32 BS 06 32 BRASS SPACER 181 NS 06 32 NS 06 32 NYLON SPACER 185 M3 WASHER N M3 WASHER N M3 WASHER 195 BS 04 32 BS 04 32 M3 BRASS SP...

Page 67: ...130 WN1412 KB30 8 POZI PAN SCREW 165 M3 WASHER S M3 WASHER SHAKEPROOF 175 M3 NYLOC M3 NUT 310 543 428 CABLE TIE 330 MB2A CABLE TIE BASE 13X13 335 MB3A CABLE TIE BASE 19X19 360 504 978 EARTH LABEL 62...

Page 68: ...Description 10 614427 MOTOR MOUNTING PLATE 20 M3X6 POZI PAN M3 SCREW 30 M3 WASHER S M3 WASHER SHAKEPROOF 40 614432 STEPPER MOTOR 60 614428 MOTOR SUPPORT PLATE 70 M3X8 POZI PAN M3 SCREW Issue 2 DRAFT...

Page 69: ...R PANEL EARTH KIT 10 614430 CONNECTOR PANEL METALWORK 20 614431 CONNECTOR PANEL LABEL 30 EGG1B305 CNL EGG1B305 CNL TOCO SOCKET 40 EGG1B307 CNL EGG1B307 CNL ULTRASOUND SOCKET 250 GCA 1S 255 LT GCA 1S 2...

Page 70: ...Description 10 614398 SPEAKER WIRE PREPARED 20 614399 SPEAKER 40 397 792 SLEEVING 50 614400 SPEAKER CLAMP PLATE 60 614401 SPEAKER MOUNT PLATE 70 M3 NYLOC M3 NUT 80 M3 WASHER M3 WASHER Issue 2 DRAFT 6...

Page 71: ...614405 US1 SERIAL NO LABEL 70 614407 614407 US1 TDR LABEL 80 M2 5X6 POZI PAN M2 5X6 POZI PAN POZIPAN SCREW 90 M2 5 WASHER S M2 5 WASHER M2 5 WASHER SHAKE 100 M2 5X8 POZI PAN M2 5X8 POZI PAN POZIPAN S...

Page 72: ...70 M2 5X8 POZI PAN M2 5X8 POZI PAN M2 5 POZI PAN 80 WN1412 KB22 8 WN1412 KB22 8 SELF TAP SCREW 90 1211 1211 BOOT 100 1208 1208 SEALING GASKET 110 1204 1204 TRANSDUCER SPACER 120 1210 1210 TOCO BUTTON...

Page 73: ...Huntleigh Diagnostics Before phoning be sure to have the following information available to ensure that our Service Department personnel are able to correctly identify your requirements Main unit mod...

Page 74: ...0049 2103 9711 00 Fax 0049 2103 9711 80 Australia Huntleigh Healthcare 63 Buckingham Drive PO Box 1116 Wangara W A 6065 Australia Tel 00168 9309 3083 Fax 00168 9309 4582 Dopplex is a registered trade...

Page 75: ...A as defined by CECC00015 published by CENELEC to avoid damage to the assemblies A 2 Recommended Soldering Equipment for Rework The following should be used for all soldering operations carried out on...

Page 76: ...ts 35 Print Head Support Screws 35 Stepper Motor to Bracket 100 Stepper Motor Bracket to Base 100 Main PCB 25 Chassis 60 PSU 60 Speaker Bracket Screws 60 Speaker Bracket Nuts 35 Rear Panel PCB 35 Pape...

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