Ultratec PD1 SERIES Pocket Doppler SERVICE MANUALfrankshospitalworkshop.com/.../service_manuals/...PD1_-_Service_manu… · File – shawn/PD1 Service Manual Issue 1 April 1999 Page

Ultratec PD1 SERIES

Pocket Doppler

SERVICE MANUAL

File – shawn/PD1 Service Manual Issue 1 April 1999 Page 2

CONTENTS1. General Introduction

1.1. Introduction1.2. Re Order Information1.3. Symbols1.4. CE Marking1.5. Guidelines for identifying and resolving adverse EMC conditions

2. Description of the Instrument2.1. Audio Unit. PD12.2. Audio Unit PD1+2.3. Dismantling Instructions2.4. Audio Unit2.5. Transducers

3. Circuit Description3.1. Introduction3.2. Audio Unit Power Supply3.3. Battery Low Indicator3.4. Ultrasound Transducer3.5. Oscillator and Detector3.6. Receiver and Detector3.7. Audio Amplifier3.8. Velocity Processor

4. Test and Calibration4.1. Introduction4.2. Performance Checks4.3. Test Procedure4.4. Audio Unit4.5. Transducer4.6. Velocity Processor4.7. Transducer Calibration

5. Fault Finding5.1. Fault Finding Guidelines

6. Parts Lists6.1. PD1+ Audio Unit PCB Assembly6.2. PD1 Audio Unit PCB Assembly6.3. PD1 2MHz Transducer assembly6.4. PD1 General Assembly6.5. PD1+ General Assembly

7. Drawings and Circuit Diagrams7.1. PD1 Audio PCB Layout7.2. PD1+ Audio PCB Layout7.3. PD1 2MHz Transducer Assembly7.4. PD1 Audio PCB Circuit Diagram7.5. PD1+ Audio PCB Circuit Diagram


1. General Introduction

1.1. Introduction

This service manual is written to support the maintenance and repair of the PD1 SeriesDoppler detectors.

Servicing of this equipment should be performed by a qualified technician, after carefullystudying this manual.

The drawings and circuit descriptions in this manual are correct as of the date it was prepared,however, however the Company reserves the right to make changes to improve the operationof the instrument. If your instrument does not exactly match the information in this manual,contact the manufacturer or distributor for revision information.

Inspect the instrument upon receipt, in the unlikely event that the unit has been damaged,notify your distributor or Ultrasound Technologies directly at the following address: -

Ultrasound Technologies Ltd.,

Foresters House,

Itton, Chepstow,

Gwent

Telephone: +44 (0) 1291 641301

FAX: +44 (0) 1291 641302

E-mail: [email protected]

Retain the packing material for possible future use.

Important Note:

In the unlikely event that the instrument must be returned to Ultrasound Technologies forservice or for any other reason, use the same packing material in which the instrument wasdelivered.

If this is not available, the instrument should be packed in such a way that will provideadequate packing. The Company will not accept any responsibility for loss or damage due toimproper use of packing material.


1.1 Re - Order InformationListed below are the consumables used with the PD1 Series Pocket Dopplers: -

Description

Aquasonic Gel 60 gm.

MN1604 Alkaline Battery

1.2 Symbols

The following symbols have been used on the PD1 and are here defined according to IEC601and B.S.5724.

IEC Symbol 878-02-02

Type B Equipment.

IEC Symbol 348

Attention Consult accompanying documents

Headset Output

Volume Control

Serial DATA Out

Rear View of PD1 / PD1+Showing additional

symbols


1.3 CE Mark

This product complies with the essential requirements of the European Council Directive93/42/EEC relating to Medical Devices.

1.4 Guidelines for identifying and resolving adverse EMC conditions

This product is classified as a Class A Group 1 type of product according to EN55011. Thisproduct is allowed in domestic establishments under the jurisdiction of a Healthcareprofessional.

Emissions

Care has been taken through the design and manufacturing process to minimise the EMemissions, which may be produced by this equipment. However, in the unlikely event that theunit causes an EM disturbance to adjacent equipment, we suggest that the procedure iscarried out ‘out of range’ of the affected equipment.

Immunity

If the user has any doubt regarding the units EM immunity during routine operation, wesuggest that the source of EM disturbance is identified and it’s emissions reduced.

If the user has any doubt regarding the identification and resolution of adverse EM conditions,they should contact Ultrasound Technologies Ltd. directly who will advise on the situation. Theaddress can be found in the front of this manual.


2. Description of the Instrument

2.1. Audio Unit PD1

The following functions are found on the PD1 Pocket Doppler (refer to page 3 of your operatinginstructions): -

UNIT ON/OFF On / Off control.

BATTERY LOW LED indicator to show when the battery has reached a point when itrequires changing.

VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the settingof the volume.

HEADSET Audio output for connection to a stereo headset for private listening.


2.2. Audio Unit PD1+The following functions are found on the PD1+ Pocket Dopplers (refer to page 3 of youroperating instructions):-

UNIT ON/OFF On / Off control.

VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the settingof the volume.

HEADSET Audio output for connection to a stereo headset for private listening.

RS 232 Interface Serial data output, for connection to the optional ULTRATRACE 2 PCsoftware. Connections are made via the 3.5mm Stereo jack socket.

FHR DISPLAY Custom LCD module displays FHR rate, FH pulse and Batterycondition.


2.3. Dismantling InstructionsSpecial Note: -The instrument must not be dismantled when in use on a patient, ensure allaccessories are disconnected.2.4. Audio UnitThe Audio unit houses the main circuit board. To remove the circuit board, turn the unit ontoit's front and remove the three M4 countersunk screws. The rear panel will now come awayrevealing the PCB.

Remove the two M3 screws securing the PCB.


The transducers, loudspeaker and battery connections are ‘hard wired’ to the PCB. De-solderthe connections at J4 (retractile cable) and J3 (loudspeaker), the PCB can then be pulled clearof the case.


1.5 TransducersThe transducers are a ‘sealed unit’. However, it is possible to gain access to the 2 MHzassembly by removing the two blanking grommets and M3 countersink screws. Removing thescrews will allow the assembly to be split along its length. Gently prise the assembly apart.

The circuit board is bonded and keyed to the faceplate assembly using a high strength cyno-acrylic adhesive.

Circuit board removal is carried out by carefully breaking the bond and de-soldering the crystalwires and retractile cable connections (see diagram below).


2.0 Circuit Description

2.1 Introduction

The circuit has been divided into functional blocks with each block being described separately,the blocks are as follows:

• Audio Unit Power Supply

• Battery Low Indicator

• Ultrasound Transducer

• Oscillator and Detector

• Oscillator and Transmitter Amplifier

• Receiver and Detector

• Audio Amplifier

• Controls and Indicators

• Unit ON / OFF

• Battery Low

2.2 Audio Unit Power Supply

The unit operates from a single 9-Volt dry battery. It is recommended that only alkaline cells beused. The audio circuit is fed directly from the battery. D1 provides circuit protection frombattery reversal.

The unit is turned on by the membrane switch, which is mounted on the front of the unit.Closing the switch, grounds the CLK input of U1 pin 3, the output on pin 2 switches on Q2allowing current to flow into the various circuits.

The unit will remain switched on for approximately 5 minutes (set by C4 and R5) after which itturns off automatically, unless the user forces the unit off by de-pressing the ON/OFF switch.2.3 Battery Low IndicatorU3 is a voltage detector, when the voltage on pin 1 drops below the threshold set by R10 andR11 (7.3V), the output state changes forcing the LED (D2) to illuminate.2.4 Ultrasound TransducerThe ultrasound transducer operates on the continuous wave Doppler principle. There are anumber of transducer frequencies suitable for different applications, however the basicoperating principles are identical.

Each transducer consists of a pair of piezo ceramic crystals, each crystal pair is arranged as atransmitter and receiver, the ultrasonic output beam is focussed through a lens or faceplate.


With the exception of the 2MHz Fetal transducer, the electronics are housed in the main audiounit.

The oscillator and detector are built up of four discrete sections. These are the masteroscillator, transmitter amplifier, receiver amplifier and detector.

These operate to produce a continuous wave ultrasound signal that is passed to thetransmitting crystal in the transducer.

The signal is then reflected from moving interfaces within the body to the receiver crystal in thetransducer, amplified and then detected so the audio Doppler shift of that moving interface canbe heard audibly and / or converted into a velocity signal.2.5 Oscillator and Transmitter AmplifierField effect transistor Q2, with L1, C16, C17 and associated components form a Colpittsoscillator. This oscillator runs at a nominal frequency of 2, 5 or 8MHz producing a sinewave ofamplitude of approximately 5V Pk.

The signal is then fed to output transistor Q3 that drives the transmitter crystal in thetransducer. The output power is set by VR1. The signal is fed to the transducer via a tunedtransformer L2 (C23), the output impedance of which is set correctly to match the transducercrystal impedance. The output drive signal is nominally 1.5V Pk.2.6 Receiver and DetectorThe reflected Doppler signal is fed via a resonant transformer L4 (C25) to the gate of Q5, thedrain of this FET connects to the source of Q4 to form a cascode amplifier the drain of whichcontains the resonant circuit L3,(C21).

From the drain of Q4 the amplitude complex of the received signal is detected by passing thesignal through diode D2 with the high frequency signals being filtered by R12 and C15.

The raw low frequency complex is then amplified and filtered by U1 where its associatedcomponents form a band pass filter amplifier with a bandwidth of 150Hz to 1KHz for theobstetrics or 300Hz to 4KHz in the vascular transducer.

This signal is passed to the audio unit via the retractile cable.2.7 Audio AmplifierThe audio signal is routed via the retractile cable to J4 pin 4 on the audio circuit board. Thesignal passes through the potentiometer VR1 to the audio amplifier U2, where it is amplifiedand output to the loudspeaker connected to J3.2.8 Velocity Processor (PD1V Model Only)The audio signal is fed from the band pass amplifier (U5) through the threshold control VR3 tothe V to F converter (U3).

The conversion factor is 0.5V/ KHz with fine adjustment provided by VR2.

The output of this circuit is then scaled by R4, 6 to a suitable voltage level for most ECGmachines and recorders.


3.0 Test and Calibration

3.1 Introduction

The following sections detail tests to ensure that the unit is operating within specification.These tests may be performed in whole or part, however, if any repairs are carried out to thepower supply circuits then it is recommended that the whole test / calibration procedure isundertaken.3.2 Performance ChecksThe following procedure is intended to provide a means of determining the functional status ofthe unit. It should be included as part of a preventative maintenance plan and should beperformed on a regular basis at least once a year.

Ensure that a full capacity alkaline cell is fitted.

Switch the unit ON and increase the volume to maximum. The battery low indicator will flashON momentarily and then extinguish.

Place the transducer with ultrasound gel on the palm of the hand over the radial artery, a clearpulse will be heard.

Check the unit for signs of damage, particularly the transducer cable near the point of entry tothe unit and transducer body.3.3 EquipmentOscilloscope 2 channel 50 MHz bandwidth minimum resolution 5mV/cm

DC Power Supply 0 – 30VDC @1A

Digital Multimeter 4 Digit measuring 1mV, 1mA, 0.1ohm

Frequency Counter 0 - 10MHz resolution at 2MHz 1KHz.

Signal Generator 10Hz to 10MHz 1mV to 10V Sinewave

3.4 Audio Unit

Set the power supply to 9VDC output and connect to battery fling leads.

Switch ON the power supply.Switch the board under test ON by shorting pins 1 and 2 of connector J1.Check the battery low LED flashes momentarily.Check the current being drawn by the board under test is less than 50ma.

Using the DVM, measure the DC voltage at the Drain of Q2 (junction of C8 & C11) this will bebetween 8.80 and 8.60 V DC.

Carefully decrease the power supply output, check and record the voltage reading at whichpoint the Battery low LED illuminates permanently. This will be between 7.0 and 7.5 V DC


Using a pair of tweezers, Introduce noise into pin 4 of J4. Rotate the volume control through itscomplete range of travel and observe the audio output from the speaker increases anddecreases accordingly.

3.5 Transducer

Transmitter

Set the DC Power Supply to 9Vdc, solder the +ve lead to pin 1 of J1 and the –ve lead to J1 pin2 on the board under test.

Switch ON the power supply, check the current being drawn by the board under test is lessthan 50ma.Using the DVM, measure the DC voltage at the junction of C8 and R7, this will be between 5.2and 5.8V DC.Using the oscilloscope connected to the pad TxSig, adjust L1 so that the signal is set to2.000MHz.

Adjust L2 to set the output to 1.5V pk/pk.

Receiver

Connect the oscilloscope to the junction of D2 and R12, adjust both L4 and L3 to maximise theDC signal.

Move the oscilloscope to J1 pin 4, carefully stroke the transducer faceplate and observe a lowfrequency signal is displayed on the oscilloscope. The measured output will be a DC voltageof greater than 5.5V.

3.6 Velocity Processor

With the oscilloscope set to AC input, adjust the output signal from audio generator to afrequency of 1kHz and an amplitude of 15mV + 1mV pk-pk. Connect this signal to the junctionof C22 and U5 pin 1.

Set frequency to 10KHz and attach oscilloscope to pin 7 IC3, adjust VR3 until the signal justchanges state from 0V to 5V. The signal will be rough DC.

Using a multimeter, place the +ve probe to the junction of R18, R19 and C19, adjust VR4 untilthe until the DC level measures 5V.


4.0 Fault finding guidelinesThis section is an aid to trouble shooting and should be used in conjunction with the relevantcircuit diagrams found at the rear of this manual. In each case the re calibration must becarried out after any repair.

The following tables list some of the symptoms and the relevant circuit areas.

NOTE Do not, under any circumstances attempt to repair the instrument whilst it is connectedto a patient.

Symptom Suspect Circuit CheckUnit does not switch ON Remote switch on front panel J1 pin 1 goes low when

switch is depressed

U1 ON/OFF Control Output goes low when switchis depressed

Battery J1 pin 1 > 7VBattery Low LED onpermanently

Battery condition J1 pin 1 > 7VReplace battery

U3 Comparator See test / calibration sectionExcessive battery drain U1 / Q2 ON/OFF Control Q2 must switch when switch

is depressed.

Change batteryUltrasound OK but no audio Transducer position Re position transducer

Crackling operation of volumecontrol VR1

Replace volume control

Broken conductor in cable Check audio signal on pin 3of U2

Headphone socket SK2 Audio signal on J3 pin 1Replace loudspeaker

Unit unstable Ultrasound transducer Check output drive intocrystal is 1.5V pk/pk.Check received signal intransducer J1 pin 4, signalshould be a low frequencyaudio signal approx. 2Vpk/pk.

Replace transducer.


5.0 Parts listThe following section contains parts lists for the following items: -

• PD1+ Audio PCB assembly

• PD1 Audio PCB assembly

• PD1 2MHz Probe assembly

• PD1 Final assembly

• PD1+ Final assembly

5.1 PD1+ Audio PCB Assembly

Device Value Device Type Circuit Reference Quantity

Capacitor 470uF Electrolytic Axial 10V Panasonic SUECEB1AU471

C10 1

Capacitor 100uF Min Electrolytic 16V5mm

Nippon Chemi-con SRA /Samsung SSM

C2,9,11,12,13,18,19,21,27,28,29,30,32,33,34,35,37

17

Capacitor 10uF tant 20V case size A AVX / Kemet case size A C5,15,16 3

Capacitor 0u47F tant 25V case size A AVX / Kemet case size A C7 1

Capacitor 0805 100nF Mono Ceramic 0805 series Z5U dielectric C1,6,8,14,17 5

Capacitor 0805 47nF Mono Ceramic 0805 series X7R dielectric C26 1

Capacitor 0805 10nF Mono Ceramic 0805 series X7R dielectric C4,36 2

Capacitor 0805 1nF Mono Ceramic 0805 series COG dielectric C20,31 2

Capacitor 0805 22pF Mono Ceramic 0805 series COG dielectric C23,24 2

Capacitor 1206 1uF Z5U Ceramic 1206 series Z5U dielectric C3,22,25 3

IC Analogue CD4013D Philips/ Harris/National U2 1

IC Analogue ZM33064Z Zetex U4 1

IC Analogue LM386M-1 National U3 1

IC Analogue LM324M National U7 1

IC PSU ICL7660CBA Maxim U1 1

IC PSU ZR78L05G Zetex U11 1

IC Digital CD74HC4066D Philips/ Harris/National U9 1

IC Digital MAX1243BESA Maxim U6 1

IC Digital MAX202ECSA Maxim U10 1

IC Digital TSC87251G1-A16CB Temec U8 1


IC Digital ICM7211AMIM44 Harris U5 1

Diode 10BQ040 IR D1 1

Diode BAS16 D2,5 2

Crystal 12MHz 86SMX X1 1

Transistor RFD8P05SM Harris Q1 1

Resistors 1% 0805 10R Samsung/Phillips/ROHM R5,6 2

Resistors 1% 0805 100R Samsung/Phillips/ROHM R3 1

Resistors 1% 0805 2K2 Samsung/Phillips/ROHM R7 1


Resistors 1% 0805 10K Samsung/Phillips/ROHM R9,13,15,16,18,19,20,21,22,23,24,25,26,28,29

15

Resistors 1% 0805 22K Samsung/Phillips/ROHM R17 1


Resistors 1% 0805 68K Samsung/Phillips/ROHM R11,14 2

Resistors 1% 0805 100K Samsung/Phillips/ROHM R10,27,31 3


Resistors 1% 0805 1M Samsung/Phillips/ROHM R1,2,4 3

LCD module PD1D107 1

Volume Control 10K Log Tsubuya 161P-N2, A10K VR1 1

Volume Control Knob Tsubuya 1KF-4B BlackKnob

VR1 knob 1

Connector Jack socket Hosiden HSJ 1501-010010 P1,2 2

Connector PP3 battery connector 1

Connector Molex 3 way ZIF Molex 39-51-4032 J2 1

PCB PD1 plus audio board PD1D109 1


5.2 PD1 Audio PCB Assembly

Device Value Device Type Circuit Reference Quantity

Capacitor 470uF Electrolytic Axial10V

Panasonic SUECEB1AU471

C7 1



C1,8,9,11,12 5

Capacitor 10uF tant 20V AVX / Kemet case size A C13,14 2

Capacitor 0u47F tant 25V AVX / Kemet case size A C4,5 2

Capacitor 1206 100nF Mono Ceramic 1206 series Z5U dielectric C6,8,9,10,15 5

Capacitor 1206 10nF Mono Ceramic 1206 series X7R dielectric C3 1

Capacitor 1206 1uF Z5U Ceramic 1206 series Z5U dielectric C2 1

IC Analogue CD4013D Philips/ Harris/National U1 1

IC Analogue ZM33064Z Zetex U3 1

IC Analogue LM386M-1 National U2 1

Diodes 10BQ040 IR D1 1

Diode LED Yellow Temic TLLY4401 D2 1

Transistor RFD8P05SM Harris Q2 1

Transistor BSS138 Fairchild Semiconductor Q1 1




Resistors 1% 1206 4K7 Samsung/Phillips/ROHM R11,12 2


Resistors 1% 1206 1M Samsung/Phillips/ROHM R3,5,6,7 4

Resistors 1% 1206 3M3 Samsung/Phillips/ROHM R1 1

Volume Control 10K Log Tsubaya 161P-N2, A10K VR1 1

Volume Control Knob Tsubuya 1KF-4B BlackKnob

VR1 knob 1

Connector Jack socket Hosiden HSJ 1501-010010 P1,2 2

Connector PP3 battery connector 1

Connector Molex 3 way ZIF Molex 39-51-3032 J2 1

PCB PD1D103 PD1 Audio PCB 1


5.3 PD1 2MHz Transducer Assembly

Description Value Device Type Circuit Reference Quantity



C5,8,12 3

Capacitor 1u0F tant 35V case size A C4,11 2

Capacitor 100nF Mono Ceramic 0805 series Z5U dielectric C1,2,3,7,10,26,22,24 8

Capacitor 10nF Mono Ceramic 0805 series X7R dielectric C18 1

Capacitor 22nF Mono Ceramic 0805 series X7R dielectric C6,13 2

Capacitor 1n0F COG Ceramic 0805 series COG dielectric C9,15,23 3

Capacitor 220pF COG Ceramic 0805 series COG dielectric C19,20,25 3

Capacitor 330pF COG Ceramic 0805 series COG dielectric C17 1



IC Analogue TL072CD SGS / TI U1 1

Diodes BZX84C6V2 D1 1

Diodes BAT54 D2 1

Transistor MMBF4416LT1 Motorola Q2,4,5 3

Transistor BC848B Q1,3 2

Inductor Toco 0838 L4 1





Resistors 1% 0805 22R Samsung/Phillips/ROHM R7 1

Resistors 1% 0805 100R Samsung/Phillips/ROHM VR1 1

Resistors 1% 0805 1K Samsung/Phillips/ROHM R3,8 2


Resistors 1% 0805 2K2 Samsung/Phillips/ROHM R1,2,11 3


Resistors 1% 0805 100K Samsung/Phillips/ROHM R4,5,6,9,10,12,18,19 8

PCB PD1D110 PD1 probe board 1

Piezo Ceramic Crystal 2MHz Resonant Frequency 2


Faceplate PD1D102 1

Probe Cover PD1D101 2

M3 x16 Pozi C'sk screw 1

M3 Full nut 1

Cover plug 2


5.4 PD1 Audio Unit General Assembly

Description Part Number Quantity

Case Front PD1D105 1

Case Rear PD1D106 1

Battery Slide PD1D104 1

Loudspeaker 1

Retractile cable PD1D100 1

Label front PD1D108 1

Label rear PD1D108 1

Front Membrane PD1D108 1

M3 x 6 Pozi Pan screw 2

M3 Internal shakeproof washer 2


Fibre flat washer 2

Cable tie 1

PVC Foam based adhesive strip 0.1

Serial number label 1


5.5 PD1+ General Assembly

Description Part Number Quantity

Case Front PD1D105 1

Case Rear PD1D106 1

Battery Slide PD1D104 1

Loudspeaker 1

Retractile cable PD1D100 1

Label front PD1+ PD1D108 1

Label rear PD1D108 1

Front Membrane PD1+ PD1D108 1


M3 Internal shakeproof washer 2


Fibre flat washer 2

Cable tie 1

PVC Foam based adhesive strip 0.1

Serial number label 1


6.0 Circuit Diagrams & Engineering DrawingsThe following section contains the following circuit diagrams and Engineering Drawings: -

• PD1 Audio PCB Layout

• PD1+ Audio PCB Layout

• PD1 2MHz Probe assembly

• PD1 Audio PCB assembly

• 2MHz Transducer PCB assembly

• PD1+ Audio PCB assembly

• PD1 GA

• PD1+ GA

• 2MHz Transducer GA


PD1 Audio PCB Layout


PD1+ Audio PCB Layout

PD1 Probe PCB Layout

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z

Tran

sduc

er C

onne

ctor

12

34

56

78

12

34

56

78

A B C D

A B C D

R547R

J21 2 3

SK1

132 4

+C

71u

0F

ZM33

064Z

U4

1IN

3O

UT

ultra

tec

1999

Cop

yrig

htD

rg N

o:

Dat

eEC

NIs

sue

Dra

wn:

Ultr

asou

nd T

echn

olog

ies

Ltd

Gw

ent.

NP6

6BZ

. UK

Itton

, Che

psto

wFo

rest

ers

Hou

seD

ate:

ofSh

eet

Nam

e:PD

1PLU

S6/

11/0

01

26:

54:1

0 PM

R32 22K

R3

100R

U1

SI76

61

2C

AP+

4C

AP-

3G

ND

8V1

+5

VO-

C10

470u

F

VR1

100K

J31 2

J11 2

LM38

6M

U3

7

18

2M

3P6 4

5

+C

510

uF

+C

1510

uF

+C

1610

uF

R6

10R

Q1

RFD

8P05

SM

2D

1 G

3S

U2

CD

4013

11C

LK9

D10

RES

ET

8SE

T

12Q

13Q

U2

CD

4013

3C

LK5

D4

RES

ET

6SE

T

2Q

1Q

R7

2K2

+C

210

0uF

+C12100uF+

C11

100u

F

+C

910

0uF

R4

1M

R2

1M

R1

1M

R8

4K7

C13

10nF

C4

10nF

D1

10BQ

040

21

C3

1uF

J4

1 2 3 4

C6

100n

FC

110

0nF

C14

100n

F

C17

100n

F

C8

100n

F

Batte

ryC

ondi

tion

{02}

Uni

tShu

tDow

n {0

2}Au

dioC

ompl

ex {0

2}

182

Jun

004

Loud

spea

ker

Nov

99

317

817

6Se

pt 9

92

June

98

1

PD1

Plus

Aud

io C

ircui

t

Volu

me

Con

trol

Con

nect

orPo

wer

Tran

sduc

er

Uni

t On

/ Off

cont

rol

Batte

ry In

put

12

34

56

78

12

34

56

78

A B C D

A B C D

J6

132 4

74H

C40

66

U9

13C

ON

TA

5C

ON

TB

6C

ON

TC

12C

ON

TD

1XA

4XB

8XC

11XD

2YA

3YB

9YC

10YD

ultra

tec

1999

Cop

yrig

htD

rg N

o:

Dat

eEC

NIs

sue

Dra

wn:

Ultr

asou

nd T

echn

olog

ies

Ltd

Gw

ent.

NP6

6BZ

. UK

Itton

, Che

psto

wFo

rest

ers

Hou

seD

ate:

ofSh

eet

Nam

e:PD

1PLU

S6/

11/0

02

26:

54:1

0 PM

MAX

202E

U10

8R

2in

9R

2out

10T2

in7

T2ou

t

2V+

6V-

1C

1+

3C

1-

4C

2+

5C

2-

13R

1in

12R

1out

11T1

in14

T1ou

t

ZR78

L05G

U11

3IN

1O

UT

J5

1 10 11 12 13141516171819

2

20212223242526

3 4 5 6 7 8 9

ICM

7211

AM

U5

17639 2835

a1

1a2

9a3

16a4

29AD

1

30AD

2

36b1

2b2

10b3

18b4

44BP

37c1

3c2

11c3

19c4

31C

S1

32C

S2

38d1

4d2

12d3

20d4

24D

B0

25D

B1

26D

B2

27D

B3

41e1

5e2

13e3

21e4

43f1

8f2

15f3

23f4

42g1

7g2

14g3

22g4

34O

SC

40Vd

d

33Vs

s

MAX

1243

U6

3SH

DN

2AI

N6

DO

UT

5G

ND

4R

EF

1VD

D7

CS

8SC

LKR1722K

R1247K

R11 68K

R1468K

C2647nFR23

330K

R30330K

LM32

4M

U7

3I+

2I-

4 11

1

LM32

4M

U7

5I+

6I-

4 11

7

LM32

4M

U7

10I+

9I-

4 11

8

LM32

4M

U7

12I+

13I-

4 11

14

C20 1nF

C311nF

C24

22pF

C23

22pF

X1 12M

Hz

R10

100K

R27100K

R31100K

BAS1

6D

5

2 3

BAS1

6D

2

23

R2010K

R1810K

R9

10K

R29

10K

R28

10K

R26

10K

R25

10K

R24

10K

R22

10K

R21

10K

R19

10K

R15

10K

R13

10K

R16

10K

AT89

C51

U8

10R

ESET

21X1

20X2

35EA

VP43

P00

42P0

141

P02

40P0

339

P04

38P0

537

P06

36P0

7

2P1

03

P11

4P1

25

P13

6P1

47

P15

8P1

69

P17

24P2

025

P21

26P2

227

P23

28P2

429

P25

30P2

631

P27

11R

XD

16T0

17T1

13TX

D

14IN

T015

INT1

19R

D18

WR

33AL

EP

32PS

EN

+C

3210

uF

C36

10nF

C25

1uF

C22

1uF

C38100nF

C21100nF

C19

100n

F

C18

100n

F

C29

100n

FC

3010

0nF

C35

100n

FC

3710

0nF

C27

100n

F

C28

100n

F

C34

100n

F

C33

100n

F

Vcc

Vcc

Vcc

Dis

p1[1

:7]

Vcc

Dis

p2[1

:7]

Vcc

Dis

play

AD1

Dis

play

AD2

Dis

p2[1

]

Dis

play

CS

Dis

p2[2

]D

isp1

[7]

4fbp

Dis

p2[3

]D

isp1

[6]

Dis

p1[2

]D

isp1

[3]

Dis

p2[4

]D

isp1

[5]

Dis

p1[1

]D

isp1

[4]

Vcc

Vcc

Dis

p2[5

]D

isp1

[7]

Dis

p1[5

]

Dis

p1[6

]D

isp2

[3]

Dis

p2[6

]D

isp1

[4]

Dis

p2[2

]D

isp2

[4]

Dis

p2[7

]D

isp1

[3]

Dis

p2[1

]D

isp2

[5]

DB[

0]D

isp3

[1]

Dis

p1[2

]Vc

cD

isp2

[7]

Dis

p2[6

]D

B[1]

Dis

p3[2

]D

isp1

[1]

Dis

p3[2

]D

isp3

[3]

DB[

2]D

isp3

[3]

Dis

p3[1

]D

isp3

[4]

DB[

3]D

isp3

[4]

Dis

p3[7

]D

isp3

[5]

Agc1

Dis

p3[5

]4g

Dis

p3[6

]Ag

c2D

isp3

[6]

Dis

play

CS

Vcc

Agc3

Dis

p3[7

]D

ispl

ayAD

2Ag

c4D

ispl

ayAD

1R

S232

_Rx

RS2

32_T

xBa

ttery

Con

ditio

n {0

1}D

isp3

[1:7

]D

B[3]

A/D

Clo

ckD

B[2]

A/D

Dat

eIn

DB[

1]

A/D

CS

DB[

0]

A/D

Off

4g4f

Uni

tShu

tDow

n {0

1}

DB[

0:3]

Vcc

A/D

Clo

ck

A/D

CS

A/D

Off

A/D

Dat

eIn

Audi

oCom

plex

{01}

Agc1

Agc2

Agc3

Agc4

182

June

00

4

RS2

32

Nov

99

178

317

6Se

pt 9

92

Adc

Feta

l Com

plex

Low

Pass

Filt

er (5

Hz)

FHR

Agc

Band

Pas

s fil

ter f

o =

220H

z

Prec

isio

n R

ectif

ier

Not

e: P

ower

Rai

l +5

- 0V

June

98

1

PD1

Plus

Dig

ital S

igna

l Pro

cess

or

LCD

Inte

rface

12 M

Hz

Clo

ck

12

34

56

78

12

34

56

78

A B C D

A B C D

C232n2F

+C

3247

0nF

+C

2547

0nF

R3810K

R39

10K

SK

132 4

SK2

132 4

J5

1 2 3 4 5VR

110

K

R1

3M3

L3 0850

1 3

C46

33pF

C38

47pF

C42

100p

F

C37

100p

F

R622K

R4

22K

C40

22pF

VR2

20K

VR3

20K

+C

610

0uF

R11

470R

R18

68K

R968K

C20

68nF

C5

68nF

LM29

07

U3

2C

harg

e3

Ib4

Is

1Tc

o

6Vc

c5

Vcco

8gn

d7

op

MMBF4416Q4

1D

3G

2S

MMBF4416Q7

1D

3G

2SMMBF4416

Q6

1D

3G

2S

D2

BZX8

4C6V

2

23

D4

BZX8

4C6V

2

23

L4 0838

1 3

4 6

BAT54D5

23

TL07

2

U5

5I+

6I-

8 4

7

TL07

2

U5

3I+

2I-

8 4

1

C30470pF

C36

470p

F

R33

1K5

R31100R

R28

100K

R36

100K

R22

100K

R30

100K

R27

100K

R23

100K

R24100K

R37

100K

L1 0841

1 2 3

BC84

8BQ

3

2B

3C

1E

BC848BQ5

2B

3C

1E

L2 0876

1 2 3

4 6

R2522R

R32

27K

C41

220p

F

C19

1nF

R19100K

R5100K

BSS1

38Q

1

3D

2G

1S

ZM33

064Z

U4

1IN

3O

UT

YEL_

3MM

D3

2 1

C2

1uF

+C

110

0uF

D1

10BQ

040

21

C10

470u

F

ultra

tec

1999

Cop

yrig

htD

rg N

o:

Dat

eEC

NIs

sue

Dra

wn:

Ultr

asou

nd T

echn

olog

ies

Ltd

Gw

ent.

NP6

6BZ

. UK

Itton

, Che

psto

wFo

rest

ers

Hou

seD

ate:

ofSh

eet

Nam

e:PD

1VAS

~110

/19/

001

13:

24:0

4 PM

J41 2

J21 2

J11 2

LM38

6M

U2

7

18

2M

3P6 4

5

+C

1610

uF

+C

1710

uF

R34

10R

R1210R

R13

10R

R35

10R

Q2

RFD

8P05

SM

2D

1 G

3S

U1

CD

4013

3C

LK5

D4

RES

ET

6SE

T

2Q

1Q

U1

CD

4013

11C

LK9

D10

RES

ET

8SE

T

12Q

13Q

R174K7

R16

4K7

+C

40u

47F

+C

70u

47F

R15

2K2

R20

2K2

R29

2K2

R14

1K0

R2

1K0

R21

1K0

R26

1K0

+C11100uF

+C

1510

0uF

+C

1410

0uF

+C

3310

0uF

+C

2610

0uF

+C

2910

0uF

C18

100n

F

C13

100n

F

C22

100n

F

C21

100n

F

C8

100n

F

C9

100n

F

C43

100n

F

C47

100n

F

C45

100n

F

C31

100n

F

C24

100n

F

C28

100n

F

R7

1M

R10

1M

R8

1M

R3

1M

C3410nF

C2710nF

C12

10nF

C3

10nF

C3910nF

Vcc

SW

Vrf

Vcc

TxSi

g

Vcc

SW

Vcc

TxSi

gVr

f

RxS

ig

RxS

ig

Vcc

SW

Nov

99

L4 =

083

9

L3 =

087

4

C44

,46

= 22

pF

C42

= 2

20pF

C40

,41

= 47

pF

C37

,38

= 22

pF8M

Hz

Com

pone

ntFr

eque

ncy

Com

pone

ntFr

eque

ncy

C46

= 4

7pF

C44

= 1

00pF

C40

= 1

00pF

C38

= 1

00pF

4MH

z

PD1

Vasc

ular

(5M

Hz)

Loud

spea

ker

Volu

me

Con

trol

Dat

a O

utpu

t Soc

ket

Wav

efor

m

0.5V

/KH

z

Filte

ring

Rec

eive

r

Tran

smitt

er

frequ

ency

to v

olta

ge c

onve

rter

Batte

ry In

put

1

NAS

Batte

ry L

ow

Uni

t On

/ Off

cont

rol

PD1 General Assembly

PD1+ GA

2MHz Transducer Assembly


Documents

Ultratec PD1 SERIES Pocket Doppler SERVICE MANUALfrankshospitalworkshop.com/.../service_manuals/...PD1_-_Service_manu… · File – shawn/PD1 Service Manual Issue 1 April 1999 Page