Ultrasound Technologies PD1 series, Fetatrack 120 series Service Manual

Ultrasound Technologies Ltd

PD1 & Fetatrack 120 series Dopplers

Service manual

PD1 / FT120 service manual Issue 3 January 2007

©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone]

E: [e-mail] W: www.doppler.co.uk

Ultrasound Technologies Ltd

Products covered by this service manual

PD1 series
pocket dopplers

Product Group

Product version

Product variation

PD1 audio pocket
doppler

Babypulse home use
doppler

Fetatrack 120 audio
doppler

PD1+ fetal doppler
with FHR display

PD1v vascular
doppler

Fetatrack 120+ fetal
doppler with FHR

PD1dwr waterbirth
doppler

PD1cv low cost
vascular doppler

PD1v flat probe
vascular doppler

PD1combi fetal /
vascular doppler

V

ascutrack 120

vascular doppler

PD1 / FT120 service manual Issue 3 January 2007

©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone]

E: [e-mail] W: www.doppler.co.uk

Ultrasound Technologies Ltd

PD1 / FT120 service manual Issue 3 January 2007

©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone]

E: [e-mail] W: www.doppler.co.uk

Products covered by this service manual

The following products are manufactured by

Ultrasound Technologies ltd,

Lodge Way,

Portskewett,

NP26 5PS,

United Kingdom

Tel:- [phone]

Fax: [phone]

Email: [e-mail]

Ultratec PD1 series fetal and vascular dopplers

Rotburg PD1 / PD1+ series fetal dopplers

Sibel PD1/ PD1+ series fetal dopplers

Gima G2000 series fetal dopllers

Gima V2000 seies vascular dopplers

Fetatrack series fetal dopplers

Vascutrack series fetal dopplers

Ultrasound Technologies Ltd

CONTENTS

1. 0General Introduction

1.1.

14

Introduction

1.2.

15

Re Order Information

1.3.

16

Symbols

1.4.

17

CE Marking

1.5.

18

Guidelines for identifying and resolving adverse EMC conditions

1.6.

19

Specification

2.

1

Description of the Instrument

2.1.

20

Audio Unit.

2.2.

21

Audio Unit

2.3.

22

Audio Unit

2.4.

23

Dismantling Instructions

2.5.

24

Audio Unit

2.6.

25

Transducers

3.

2

Circuit Description

3.1.

26

Introduction

3.2.

27

Audio Unit Power Supply

3.3.

28

Battery Low Indicator

3.4.

29

Ultrasound Transducer

3.5.

30

Oscillator and Detector

3.6.

31

Receiver and Detector

3.7.

32

Audio Amplifier

3.8.

33

Velocity Processor

4.

3

Test and Calibration

4.1.

34

Introduction

4.2.

35

Performance Checks

4.3.

36

Test Procedure

4.4.

37

Audio Unit

4.5.

38

Transducer

4.6.

39

Velocity Processor

4.7.

40

Transducer Calibration

5.

4

Fault Finding

5.1.

41

Fault Finding Guidelines

6.

5

Parts Lists

6.1.

42

Audio Unit PCB Assembly

6.2.

43

Audio Unit with heart rate PCB Assembly

6.3.

44

2MHz Transducer assembly

6.4.

45

General Assembly

6.5.

46

+ units General Assembly

7.

6

Drawings and Circuit Diagrams

PD1 / FT120 service manual Issue 3 January 2007

©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T [phone] F: [phone]

E: [e-mail] W: www.doppler.co.uk

Ultrasound Technologies Ltd

©Ultrasound Technologies Ltd Page 1 of 32
PD1 / FT120 service manual Issue 3 January 2007

1. 7General Introduction

1.1. 47Introduction
This service manual is written to support the maintenance and repair of the PD1 Series Doppler detectors.
Servicing of this equipment should be performed by a qualified technician, after carefully studying 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 operation of 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.,
Lodge Way, Portskewett

48

Caldicot, NP26 5PS
South Wales , UK
Telephone: [phone]
FAX: [phone]

49

E-mail: [e-mail]
Retain the packing material for possible future use.

Important Note:

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

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

Ultrasound Technologies Ltd

1.1 50Re - Order Information
Listed below are the consumables used with the PD1 Series Pocket Dopplers: -

Description
Ultrasound Coupling Gel 0.25ltr.

51

MN1604 series Alkaline Battery

1.2

52

Symbols

The following symbols have been used on the PD1 and are here defined according to IEC60601

IEC Symbol 878-02-02

Type B Equipment.

IEC Symbol 348

86

Attention Consult accompanying documents

Headset Output

Volume Control

Serial DATA Out

Rear View of doppler

Showing additional symbols

©Ultrasound Technologies Ltd Page 2 of 32

PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

1.3 53CE Mark
This product complies with the essential requirements of the European Council Directive 93/42/EEC relating to Medical

Devices.

0120

1.4

54

Guidelines for identifying and resolving adverse EMC conditions

This product is classified as a Class A Group 1 type of product according to EN55011.

Emissions

Care has been taken through the design and manufacturing process to minimise the EM emissions, which 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.

Immunity

If the user has any doubt regarding the units EM immunity during routine operation, we suggest that the source of EM
disturbance is identified and it’s emissions reduced. If there is any doubt regarding the identification and resolution of
adverse EM conditions, contact Ultrasound Technologies Ltd directly who will advise on the situation. The address
can be found in the front of this manual.

©Ultrasound Technologies Ltd Page 3 of 32

PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

1.5 Series specifications

Ultrasound

Frequency (PD1+ / PD1dwr / fetatrack 120+) 2 MHz continuous wave fixed probe

(PD1v / PD1cv / Vascutrack 120) 5 or 8 MHz continuous wave fixed probe

(PD1 combi /PD1+ combi / Combitrack) 2, 3, 5 or 8MHz interchangeable probe
Transducer 2 crystal narrow beam.
Output power <5mW/cm² SATA (2, 3 MHz fetal probe)
<15mW/cm² SATA (5 and 8MHz vascular probe)
Audio response 300Hz – 1KHz (fetal)
300Hz – 4KHz (vascular)
Audio output 500mW
Fetal heart rate (PD1+ / PD1+ combi / PD1dwr / fetatrack 120+) Multipoint real time autocorrelator
Fetal Heart Range 50 to 210 bpm

Unit Controls

Keys 1 Key (for unit on/off on audio unit – all models)
1 Key (for unit on/off on probe – fetatrack 120 and vascutrack 120 models)
Controls Rotary volume
Indicators (PD1 / PD1/ combi / PD1v / fetatrack 120 / vascutrack 120) Yellow battery low LED
Indicators (PD1+ / PD1+ combi / PD1dwr / fetatrack 120+)

3 digit FHR LCD display / FHR pulse

icon / Battery Low icon

Power Supply

Battery MN1604 (PP3) 9V Alkaline Manganese
Expected battery life (PD1 / PD1v / fetatrack 120 / vascutrack 120) >9 hours
Expected battery life (PD1+ / PD1dwr / fetatrack 120+) >8 hours

Outputs

Headset Audio output to optional headset
Serial (PD1+ / PD1dwr / fetatrack 120+) RS232 interface to optional UltraTrace software
Recorder (PD1v [not PD1v CAT] / vascutrack 120) Voltage output proportional to velocity of

flow

Enclosure

Material ABS
Size 150mm by 75mm
Weight 295g typically including transducer

Safety

Classification Class 1 Type B - IEC 60601-1

©Ultrasound Technologies Ltd Page 4 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

2. 8Description of the Instrument

2.1. 55Audio Unit PD1 (Fetatrack 120, Babypulse)
The following functions are found in the relevant page of the operating instructions.
UNIT ON/OFF On / Off control.

BATTERY LOW LED indicator to show when the battery has reached a point when it requires changing.
VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the setting of the volume.
HEADSET Audio output for connection to a stereo headset for private listening.

PD1 / Babypulse
fetal transducer

Fetatrack 120
fetal transducer

©Ultrasound Technologies Ltd Page 5 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

2.2. 56Audio Unit PD1+ (PD1dwr / fetatrack 120+ / babypulse +)
The following functions are found in the relevant page of the operating instructions.

UNIT ON/OFF On / Off control.
VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the setting of 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 PC software. Connections are

made via the 3.5mm Stereo jack socket.

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

PD1+ / Babypulse+ /
PD1dwr fetal
tr

ansduce

r

Fetatrack 120 + fetal
transducer

©Ultrasound Technologies Ltd Page 6 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

2.3.

57

Audio Unit PD1v

The following functions are found in the relevant page of the operating instructions.
UNIT ON/OFF On / Off control.

BATTERY LOW LED indicator to show when the battery has reached a point when it requires changing.
VOLUME CONTROL Rotary edge potentiometer, which increases or decreases the setting of the volume.
HEADSET Audio output for connection to a stereo headset for private listening.

©Ultrasound Technologies Ltd Page 7 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

2.4. 58Dismantling Instructions

Special Note: -The instrument must not be dismantled when in use on a patient, ensure all accessories
are disconnected.

2.5. 59Audio Unit
The Audio unit houses the main circuit board. To remove the circuit board, turn the unit onto it's front and

remove the three M4 countersunk screws. The rear panel will now come away revealing the PCB.
Remove the two M3 screws securing the PCB.

©Ultrasound Technologies Ltd Page 8 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

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

©Ultrasound Technologies Ltd Page 9 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

60

2.6 Transducers

The transducers are a ‘sealed unit’. However, it is possible to gain access to the 2 MHz assembly by
removing the two blanking grommets and M3 countersink screws. Removing the screws 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 crystal wires and
retractile cable connections (see diagram below).

©Ultrasound Technologies Ltd Page 10 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

3.0 Circuit Description

3.1 61Introduction

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

3.2

62

Audio Unit Power Supply

The unit operates from a single 9-Volt dry battery. It is recommended that only alkaline cells
be used. The audio circuit is fed directly from the battery. D1 provides circuit protection from
battery 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 Q2
allowing current to flow into the various circuits.

The unit will remain switched on for approximately 5 minutes (set by C4 and R5) after which it
turns off automatically, unless the user forces the unit off by de-pressing the ON/OFF switch.

3.3

63

Battery Low Indicator

U3 is a voltage detector, when the voltage on pin 1 drops below the threshold set by R10 and
R11 (7.3V), the output state changes forcing the LED (D2) to illuminate.

3.4

64

Ultrasound Transducer

The ultrasound transducer operates on the pulse wave Doppler principle. There are a number
of transducer frequencies suitable for different applications, however the basic operating
principles are identical.

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

©Ultrasound Technologies Ltd Page 11 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

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

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

These operate to produce a pulse wave ultrasound signal that is passed to the transmitting
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 and / or converted into a velocity signal.

3.5

65

Oscillator and Transmitter Amplifier

Field effect transistor Q2, with L1, C16, C17 and associated components form a Colpitts
oscillator. This oscillator runs at a nominal frequency of 2, 5 or 8MHz producing a pulse wave
of amplitude of approximately 5V Pk.

The signal is then fed to output transistor Q3 that drives the transmitter crystal in the
transducer. The output power is set by VR1. The signal is fed to the transducer via a tuned
transformer L2 (C23), the output impedance of which is set correctly to match the transducer
crystal impedance. The output drive signal is nominally 1.5V Pk.

3.6

66

Receiver and Detector

The reflected Doppler signal is fed via a resonant transformer L4 (C25) to the gate of Q5, the
drain of this FET connects to the source of Q4 to form a cascode amplifier the drain of which
contains the resonant circuit L3,(C21).

From the drain of Q4 the amplitude complex of the received signal is detected by passing the
signal 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 associated
components form a band pass filter amplifier with a bandwidth of 150Hz to 1KHz for the
obstetrics or 300Hz to 4KHz in the vascular transducer.

This signal is passed to the audio unit via the retractile cable.

3.7

67

Audio Amplifier

The audio signal is routed via the retractile cable to J4 pin 4 on the audio circuit board. The
signal passes through the potentiometer VR1 to the audio amplifier U2, where it is amplified
and output to the loudspeaker connected to J3.

3.8

68

Velocity Processor (PD1V Model Only)

The audio signal is fed from the band pass amplifier (U5) through the threshold control VR3 to
the 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 ECG

machines and recorders.

©Ultrasound Technologies Ltd Page 12 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

4.0 9Test and Calibration

4.1

69

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 the
power supply circuits then it is recommended that the whole test / calibration procedure is
undertaken.

4.2

70

Performance Checks

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 preventative maintenance plan and should be
performed 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 flash

ON momentarily and then extinguish.
Place the transducer with ultrasound gel on the palm of the hand over the radial artery, a

clear pulse will be heard.
Check the unit for signs of damage, particularly the transducer cable near the point of entry to

the unit and transducer body.

4.3

71

Equipment

Oscilloscope 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

4.4

72

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 be

between 8.80 and 8.60 V DC.
Carefully decrease the power supply output, check and record the voltage reading at which

point the Battery low LED illuminates permanently. This will be between 7.0 and 7.5 V DC

©Ultrasound Technologies Ltd Page 13 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

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

4.5

73

Transducer

87

Transmitter

Set the DC Power Supply to 9Vdc, solder the +ve lead to pin 1 of J1 and the –ve lead to
J1 pin 2 on the board under test.

Switch ON the power supply, check the current being drawn by the board under test is
less than 50ma.

Using the DVM, measure the DC voltage at the junction of C8 and R7, this will be
between 5.2 and 5.8V DC.

Using the oscilloscope connected to the pad TxSig, adjust L1 so that the signal is set to

2.000MHz.
Adjust L2 to set the output to 1.5V pk/pk.

88

Receiver

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

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

4.6

74

Velocity Processor

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

Set frequency to 10KHz and attach oscilloscope to pin 7 IC3, adjust VR3 until the signal
just changes 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
until the until the DC level measures 5V.

©Ultrasound Technologies Ltd Page 14 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

5.0 10Fault finding guidelines

This section is an aid to trouble shooting and should be used in conjunction with the relevant circuit
diagrams found at the rear of this manual. In each case the re calibration must be carried 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 connected to

a patient.

Symptom Suspect Circuit Check

Unit 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 switch

is depressed
Battery J1 pin 1 > 7V
Battery Low LED on
permanently

Battery condition J1 pin 1 > 7V

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

is depressed.

Change battery
Ultrasound OK but no audio Transducer position Re position transducer
Crackling operation of volume

control VR1

Replace volume control
Broken conductor in cable Check audio signal on pin 3

of U2
Headphone socket SK2 Audio signal on J3 pin 1

Replace loudspeaker
Unit unstable Ultrasound transducer Check output drive into

crystal is 1.5V pk/pk.

Check received signal in

transducer J1 pin 4, signal

should be a low frequency

audio signal approx. 2Vpk/pk.

Replace transducer.

©Ultrasound Technologies Ltd Page 15 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

6.0 11Parts list

The 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

6.1

75

PD1+ Audio PCB Assembly

Device Value Device Type Circuit Reference Quantity

Capacitor 470uF Electrolytic Axial 10V Panasonic SU

ECEB1AU471

C10 1

Capacitor 100uF Min Electrolytic 16V

5mm

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

©Ultrasound Technologies Ltd Page 16 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

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 4K7 Samsung/Phillips/ROHM R8 1

Resistors 1% 0805 10K Samsung/Phillips/ROHM R9,13,15,16,18,19,20,21,22,23,24,25,26,2

8,29

15

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

Resistors 1% 0805 47K Samsung/Phillips/ROHM R12 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 330K Samsung/Phillips/ROHM R30 1

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 Black Knob 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

©Ultrasound Technologies Ltd Page 17 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

6.2

76

PD1 Audio PCB Assembly

Device

12

Value

Device Type Circuit Reference

Quantity

Capacitor 470uF Electrolytic Axial 10V Panasonic SU

ECEB1AU471

C7 1

Capacitor 100uF Min Electrolytic 16V

5mm

Nippon Chemi-con SRA /
Samsung SSM

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 10R Samsung/Phillips/ROHM R8,9 2

Resistors 1% 1206 1K Samsung/Phillips/ROHM R2 1

Resistors 1% 1206 2K2 Samsung/Phillips/ROHM R10 1

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

Resistors 1% 1206 100K Samsung/Phillips/ROHM R4 1

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 Black

Knob

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

©Ultrasound Technologies Ltd Page 18 of 32
PD1 / FT120 service manual Issue 3 January 2007

Ultrasound Technologies Ltd

6.3

77

PD1 2MHz Transducer Assembly

Description

85

Value

Device Type Circuit Reference

Quantity

Capacitor 100uF Min Electrolytic 16V

5mm

Nippon Chemi-con SRA /
Samsung SSM

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

Capacitor 470pF COG Ceramic 0805 series COG dielectric C21 1

Capacitor 680pF COG Ceramic 0805 series COG dielectric C16 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

Inductor Toco 0842 L3 1

Inductor Toco 0841 L1 1

Inductor Toco 0876 L2 1

Resistors 1% 0805 10R Samsung/Phillips/ROHM R17,16 2

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 1K5 Samsung/Phillips/ROHM R15 1

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

Resistors 1% 0805 27K Samsung/Phillips/ROHM R14 1

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

©Ultrasound Technologies Ltd Page 19 of 32
PD1 / FT120 service manual Issue 3 January 2007