Download PD1 & FT120 series pocket dopplers

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 +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
Products covered by this service manual
Product Group
PD1 series
pocket dopplers
Product version
Product variation
Babypulse home use
doppler
PD1 audio pocket
doppler
Fetatrack 120 audio
doppler
PD1dwr waterbirth
doppler
PD1+ fetal doppler
with FHR display
Fetatrack 120+ fetal
doppler with FHR
PD1v flat probe
vascular doppler
PD1v vascular
doppler
Vascutrack 120
vascular doppler
PD1cv low cost
vascular doppler
PD1combi fetal /
vascular doppler
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
Products covered by this service manual
The following products are manufactured by
Ultrasound Technologies ltd,
Lodge Way,
Portskewett,
NP26 5PS,
United Kingdom
Tel:- +44 (0) 1291 425425
Fax: +44 (0) 1291 427093
Email: [email protected]
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
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
CONTENTS
1.
General Introduction
1.1. Introduction
1.2. Re Order Information
1.3. Symbols
1.4. CE Marking
1.5. Guidelines for identifying and resolving adverse EMC conditions
1.6. Specification
Description of the Instrument
2.1. Audio Unit.
2.2. Audio Unit
2.3. Audio Unit
2.4. Dismantling Instructions
2.5. Audio Unit
2.6. Transducers
Circuit Description
3.1. Introduction
3.2. Audio Unit Power Supply
3.3. Battery Low Indicator
3.4. Ultrasound Transducer
3.5. Oscillator and Detector
3.6. Receiver and Detector
3.7. Audio Amplifier
3.8. Velocity Processor
Test and Calibration
4.1. Introduction
4.2. Performance Checks
4.3. Test Procedure
4.4. Audio Unit
4.5. Transducer
4.6. Velocity Processor
4.7. Transducer Calibration
Fault Finding
5.1. Fault Finding Guidelines
Parts Lists
6.1. Audio Unit PCB Assembly
6.2. Audio Unit with heart rate PCB Assembly
6.3. 2MHz Transducer assembly
6.4. General Assembly
6.5. + units General Assembly
Drawings and Circuit Diagrams
0
14
15
16
17
18
19
2.
1
20
21
22
23
24
25
3.
2
26
27
28
29
30
31
32
33
4.
3
34
35
36
37
38
39
40
5.
4
41
6.
5
42
43
44
45
46
7.
6
PD1 / FT120 service manual Issue 3 January 2007
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
1. General Introduction
7
1.1.
47
Introduction
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
Caldicot, NP26 5PS
48
South Wales , UK
49
Telephone:
+44 (0) 1291 425425
FAX:
+44 (0) 1291 427093
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 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
PD1 / FT120 service manual Issue 3 January 2007
Page 1 of 32
Ultrasound Technologies Ltd
1.1
50
Re - Order Information
Listed below are the consumables used with the PD1 Series Pocket Dopplers: Description
Ultrasound Coupling Gel 0.25ltr.
51
1.2
52
MN1604 series Alkaline Battery
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
Serial DATA Out
Headset Output
Volume Control
Rear View of doppler
Showing additional symbols
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 2 of 32
Ultrasound Technologies Ltd
1.3
53
CE 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
PD1 / FT120 service manual Issue 3 January 2007
Page 3 of 32
Ultrasound Technologies Ltd
1.5
Series specifications
Ultrasound
Frequency
Transducer
Output power
Audio response
Audio output
Fetal heart rate
Fetal Heart Range
Unit Controls
Keys
Controls
Indicators
Indicators
Power Supply
Battery
Expected battery life
Expected battery life
(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
2 crystal narrow beam.
<5mW/cm² SATA (2, 3 MHz fetal probe)
<15mW/cm² SATA (5 and 8MHz vascular probe)
300Hz – 1KHz (fetal)
300Hz – 4KHz (vascular)
500mW
(PD1+ / PD1+ combi / PD1dwr / fetatrack 120+) Multipoint real time autocorrelator
50 to 210 bpm
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)
Rotary volume
(PD1 / PD1/ combi / PD1v / fetatrack 120 / vascutrack 120) Yellow battery low LED
(PD1+ / PD1+ combi / PD1dwr / fetatrack 120+) 3 digit FHR LCD display / FHR pulse
icon / Battery Low icon
MN1604 (PP3) 9V Alkaline Manganese
(PD1 / PD1v / fetatrack 120 / vascutrack 120) >9 hours
(PD1+ / PD1dwr / fetatrack 120+) >8 hours
Outputs
Headset
Serial
Recorder
Enclosure
Material
Size
Weight
Audio output to optional headset
(PD1+ / PD1dwr / fetatrack 120+) RS232 interface to optional UltraTrace software
(PD1v [not PD1v CAT] / vascutrack 120) Voltage output proportional to velocity of
flow
ABS
150mm by 75mm
295g typically including transducer
Safety
Classification
Class 1 Type B - IEC 60601-1
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 4 of 32
Ultrasound Technologies Ltd
2. Description of the Instrument
8
2.1.
55
Audio 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
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Fetatrack 120
fetal transducer
Page 5 of 32
Ultrasound Technologies Ltd
2.2.
56
Audio 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
transducer
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Fetatrack 120 + fetal
transducer
Page 6 of 32
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
PD1 / FT120 service manual Issue 3 January 2007
Page 7 of 32
Ultrasound Technologies Ltd
2.4.
58
Dismantling Instructions
Special Note: -The instrument must not be dismantled when in use on a patient, ensure all accessories
are disconnected.
2.5. Audio Unit
59
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
PD1 / FT120 service manual Issue 3 January 2007
Page 8 of 32
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
PD1 / FT120 service manual Issue 3 January 2007
Page 9 of 32
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
PD1 / FT120 service manual Issue 3 January 2007
Page 10 of 32
Ultrasound Technologies Ltd
3.0
3.1
Circuit Description
61
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
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
PD1 / FT120 service manual Issue 3 January 2007
Page 11 of 32
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
PD1 / FT120 service manual Issue 3 January 2007
Page 12 of 32
Ultrasound Technologies Ltd
4.0
4.1
9
Test and Calibration
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
PD1 / FT120 service manual Issue 3 January 2007
Page 13 of 32
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
87
Transducer
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
PD1 / FT120 service manual Issue 3 January 2007
Page 14 of 32
Ultrasound Technologies Ltd
5.0 Fault finding guidelines
10
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
a patient.
Do not, under any circumstances attempt to repair the instrument whilst it is connected to
Symptom
Unit does not switch ON
Battery Low LED on
permanently
Excessive battery drain
Ultrasound OK but no audio
Unit unstable
Suspect Circuit
Check
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
J1 pin 1 > 7V
J1 pin 1 > 7V
Replace battery
See test / calibration section
Q2 must switch when switch
is depressed.
Battery
Battery condition
U3 Comparator
U1 / Q2 ON/OFF Control
Change battery
Transducer position
Re position transducer
Crackling operation of volume Replace volume control
control VR1
Broken conductor in cable
Check audio signal on pin 3
of U2
Headphone socket SK2
Audio signal on J3 pin 1
Replace loudspeaker
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
PD1 / FT120 service manual Issue 3 January 2007
Page 15 of 32
Ultrasound Technologies Ltd
6.0 Parts list
11
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 Nippon Chemi-con SRA /
5mm
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
PD1 / FT120 service manual Issue 3 January 2007
Page 16 of 32
Ultrasound Technologies Ltd
IC Digital
ICM7211AMIM44
Harris
U5
1
IR
D1
1
D2,5
2
Diode
10BQ040
Diode
BAS16
Crystal
12MHz
86SMX
X1
1
RFD8P05SM
Harris
Q1
1
Transistor
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
Volume Control
10K Log
Volume Control Knob
Connector
Jack socket
Connector
PP3 battery connector
Connector
Molex 3 way ZIF
PCB
PD1 plus audio board
1
Tsubuya 161P-N2, A10K
VR1
1
Tsubuya 1KF-4B Black Knob VR1 knob
1
Hosiden HSJ 1501-010010
2
P1,2
1
Molex 39-51-4032
PD1D109
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
J2
1
1
Page 17 of 32
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 Nippon Chemi-con SRA /
5mm
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
Harris
Q2
1
Transistor
RFD8P05SM
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
10K Log
Tsubaya 161P-N2, A10K
VR1
1
Tsubuya 1KF-4B Black
Knob
VR1 knob
1
Volume Control
Volume Control Knob
Connector
Jack socket
Connector
PP3 battery connector
Connector
Molex 3 way ZIF
PCB
PD1D103
Hosiden HSJ 1501-010010 P1,2
2
1
Molex 39-51-3032
PD1 Audio PCB
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
J2
1
1
Page 18 of 32
Ultrasound Technologies Ltd
6.3
77
PD1 2MHz Transducer Assembly
Description
Capacitor
85
Value
Device Type
100uF Min Electrolytic 16V Nippon Chemi-con SRA /
5mm
Samsung SSM
Circuit Reference
Quantity
C5,8,12
3
case size A
C4,11
2
Capacitor
1u0F tant 35V
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
SGS / TI
U1
1
IC Analogue
TL072CD
Diodes
BZX84C6V2
D1
1
Diodes
BAT54
D2
1
Q2,4,5
3
Q1,3
2
Transistor
MMBF4416LT1
Transistor
BC848B
Motorola
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
Piezo Ceramic Crystal
PD1D110
PD1 probe board
2MHz Resonant Frequency
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
1
2
Page 19 of 32
Ultrasound Technologies Ltd
Faceplate
PD1D102
1
Probe Cover
PD1D101
2
M3 x16 Pozi C'sk screw
1
M3 Full nut
1
Cover plug
2
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 20 of 32
Ultrasound Technologies Ltd
6.4
78
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
M4 x 12 Pozi Pan screw
3
Fibre flat washer
2
Cable tie
1
PVC Foam based adhesive strip
Serial number label
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
0.1
1
Page 21 of 32
Ultrasound Technologies Ltd
6.5
79
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 x 6 Pozi Pan screw
2
M3 Internal shakeproof washer
2
M4 x 12 Pozi Pan screw
3
Fibre flat washer
2
Cable tie
1
PVC Foam based adhesive strip
Serial number label
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
0.1
1
Page 22 of 32
Ultrasound Technologies Ltd
7.0 Circuit Diagrams & Engineering Drawings
13
The following section contains circuit diagrams and Engineering Drawings: -
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 23 of 32
Ultrasound Technologies Ltd
•
PD1 Audio PCB Layout
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 24 of 32
Ultrasound Technologies Ltd
80
PD1+ Audio PCB Layout
©Ultrasound Technologies Ltd
PD1 / FT120 service manual Issue 3 January 2007
Page 25 of 32
Ultrasound Technologies Ltd
81
PD1 Probe PCB Layout
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
82
PD1 General Assembly
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
Ultrasound Technologies Ltd
83
PD1+ GA
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
84
2MHz Transducer Assembly
Ultrasound Technologies Ltd
©Ultrasound Technologies Ltd, Lodge Way, Portskewett, Caldicot, South Wales NP26 5PS, United Kingdom.
T +44 (0) 1291 425425
F: +44 (0) 1291 427093 E: [email protected] W: www.doppler.co.uk
D
C
B
A
2
1
C1
100uF
R1
10M
+
Vcc
S
BSS138
Q1
D
R2
1K0
2
1
1
3
2
C3
10nF
R3
1M
2
13
Q
12
Q
+
R5
1M
3
R6
1M
4
Q2
RFD8P05SM
J3
SK1
+
G1
Loudspeaker
1
Q
2
Q
CD4013
U1
6
SET
3
CLK
5
D
4
RESET
C4
0u47F
CD4013
U1
8
SET
11
CLK
9
D
10
RESET
G
C2
1uF
Unit On / Off control
J2
1
10BQ040
2
Vcc
3
S
3
2
1
4
C5
0u47F
R7
1M
2
4
3
1
D
2
1
Battery Input
J1
D1
2
100K
R4
1
100uF
C8
C10
100nF
R9
10R
R13
10K
C9
10nF
5
8
1
P
7
+
M
LM386M
1
R11
4K7
R10
2K2
OUT
2
3
C7
470uF
ZM33064Z
IN
U3
5
Copyright
ultratec 1999
VccSW
6
Foresters House
Itton, Chepstow
Gwent. NP6 6BZ. UK
100nF
C15
3
Battery Low
6
Ultrasound Technologies Ltd
C14
10uF
U2
5
C13
10uF
+
C12
100uF
C11
100uF
VccSW
+
+
C6
100nF
+
6
4
4K7
R12
47R
R8
YEL_3MM
7
1
2
3
Issue
8
174
181
ECN
4
3
2
1
Date
7
8
Drawn: nas - utl Drg No:
Date: 5/18/00
10:58:44 PM
Name: PKDAUDIO
Sheet 1
of 1
March 98
30/06/99
18/05/00
J4
Transducer
Power
Connector
PD1 Audio and Power Control
Volume Control
VR1
10K
D2
2
1
D
C
B
A
D
C
B
4
3
2
1
1
Transducer Connector
J1
2
C1
100nF
7
U1
I+
C4
0u47F
I-
TL072
6
+
3
1K0
R3
R5
100K
R4
100K
5
C
C5
100uF
3
D1
BZX84C6V2
C3 +
100nF
R2
2K2
Q1
BC848B
2
3
2
E
1
10nF
C6
B
1
U1
C7 +
100nF
Vrf
C8
100uF
4
2
3
4
R8
0u47F
I-
TL072
I+
R7
22R
3
+
1K0
R
R9
100K
C12
100uF
100K
R10
C10 +
100nF
C15
1nF
G
5
3
5
2
1
R12
100K
R11
2K2
S
D
C17
330pF
C16
680pF
MMBF4416
Q2
A
2
8
4
R1
2K2
C2
100nF
1
10nF
C13
(VR1)
L1
0841
2
C19
220pF
6
C22
100nF
C21
470pF
R15
1K5
R14
27K
B
C20
220pF
2
S
D
S
Copyright
ultratec 1999
6
3
3
Foresters House
Itton, Chepstow
Gwent. NP6 6BZ. UK
Vrf
G
G
R16
10R
2
1
2
1
3
R17
10R
E
C
L3
0842
1
3
D
3
1
1
C23
1nF 2
Ultrasound Technologies Ltd
3
3
2
1
100R
R13
D2
BAT54
8
4
R6
100K
C9
1nF
Q4
MMBF4416
Q5
MMBF4416
BC848B
Q3
10nF
C18
6
4
6
4
RxSig
ECN
158
181
Issue
1
2
3
4
L4
0838
8
Date
March 98
15/05/98
18/01/99
18/05/00
7
8
Drawn: nas - utl Drg No:
Date: 6/11/00
1:58:30 PM
Name: FETALTDR
Sheet 1
of 1
Pocket Doppler Fetal Transducer 2MHz
3
1
C25
220pF
R19
100K
R18
100K
C26
100nF
TxSig
L2
0876
C24
100nF
7
D
C
B
A
D
C
B
1
2
1
C1
100nF
+
D1
2
100uF
C2
5
J2
1
10BQ040
2
V1+
CAP-
GND
CAP+
U1
C3
1uF
SI7661
VO-
3
2
1
Unit On / Off control
Battery Input
J1
4
3
2
8
3
C5
10uF
+
C6
100nF
R3
100R
UnitShutDown {02}
13
Q
12
Q
R2
1M
1
Q
2
Q
CD4013
U2
6
SET
3
CLK
5
D
4
RESET
CD4013
U2
8
SET
11
CLK
9
D
10
RESET
C4
10nF
R1
1M
3
4
J3
SK1
4
2
1
2
4
3
1
C7
1u0F
R4
1M
Loudspeaker
+
G1
Q1
RFD8P05SM
S
3
D
2
2
C10
470uF
+
+
C8
100nF
47R
R5
A
1
R32
22K
C13
10nF
C14
100nF
5
5
C11
100uF
C9
100uF
R6
10R
C12
100uF
+
1
OUT
U4
3
P
+
7
M
LM386M
1
6
100nF
C17
VR1
100K
Copyright
ultratec 1999
6
Foresters House
Itton, Chepstow
Gwent. NP6 6BZ. UK
4
3
2
1
J4
Transducer
Power
Connector
7
ECN
176
178
182
Issue
1
2
3
4
8
Date
June 98
Sept 99
Nov 99
Jun 00
7
8
PD1 Plus Audio Circuit
Drg No:
Drawn:
Date: 6/11/00
6:54:10 PM
Name: PD1PLUS
Sheet 1
of 2
Volume Control
BatteryCondition {02}
Ultrasound Technologies Ltd
2
3
AudioComplex {02}
ZM33064Z
IN
+
8
C16
10uF
U3
5
C15
10uF
R8
4K7
R7
2K2
6
4
D
C
B
A
D
C
B
Disp2[5]
Disp2[6]
22
21
20
19
18
17
16
15
14
5
6
7
8
9
Disp2[1]
Disp2[7]
Disp3[2]
Disp3[7] 11
13
Disp2[2]
Disp3[1] 10
12
Disp1[6]
1
C18
100nF
C19
100nF
Disp3[1:7]
Disp2[4]
23
4
Disp1[7]
J5
Disp1[4]
24
3
4g
Disp1[3]
25
2
Disp1[1]
R9
10K
Disp3[6]
Disp3[5]
Disp3[4]
Disp3[3]
Disp2[3]
Disp1[5]
26 bp
1
4f
Disp1[2]
A/DOff
Vcc
4g
4
3
2
1
REF
ICM7211AM
GND
DOUT
2
Adc
CS
SCLK
MAX1243
U6
g4
e4
d4
SHDN
AIN
VDD
22
21
20
c4
5
6
7
8
4f
A/DDateIn
A/DCS
C20
1nF
100K
R10
1
DisplayAD1
DisplayAD2
R11
68K
DB[0]
DB[1]
DB[2]
DB[3]
Vcc
DisplayCS
Disp1[1]
Disp1[2]
Disp1[3]
Disp1[4]
Disp1[5]
Disp1[6]
Disp1[7]
A/DClock
23
24
25
26
Fetal Complex
f4
DB0
DB1
DB2
DB3
27
19
b4
29
30
31
32
33
34
35
36
37
18
AD1
AD2
CS1
CS2
Vss
OSC
a1
b1
c1
28
a4
f3
g3
e3
d3
c3
b3
a3
f2
17
16
Disp3[7]15
Disp3[6]14
Disp3[5]13
Disp3[4]12
Disp3[3]11
Disp3[2]10
Disp3[1] 9
Disp2[7] 8
d1
38
g2
40
41
42
43
44
Disp2[6] 7
Vdd
e1
g1
f1
BP
39
e2
d2
c2
b2
a2
6
Disp2[5] 5
Disp2[4] 4
Disp2[3] 3
Disp2[2] 2
Disp2[1] 1
I-
11
I+
LM324M
4
R12
47K
3
C22
1uF
C23
22pF
R13
10K
Vcc
3
2
1uF
C25
UnitShutDown {01}
A/DOff
A/DCS
A/DDateIn
A/DClock
R15
10K
Vcc
D2
BAS16
C24
22pF
12MHz
X1
12 MHz Clock
BatteryCondition {01}
LowPass Filter (5Hz)
U7
100nF
C21
3
2
A
R14
68K
U5
R17
22K
DB[0:3]
P17
P16
P15
P14
P13
P12
P11
P10
T1
T0
INT1
INT0
RESET
X2
X1
EAVP
I-
11
I+
LM324M
4
4
5
6
AT89C51
U8
Precision Rectifier
7
BAS16
D5
U7
9
8
7
6
5
4
3
2
17
16
15
14
10
20
21
35
R16
10K
Vcc
10K
R18
Disp1[1:7]
11
13
33
32
18
19
31
30
29
28
27
26
25
24
36
37
38
39
40
41
42
43
FHR Agc
RXD
TXD
ALEP
PSEN
WR
RD
P27
P26
P25
P24
P23
P22
P21
P20
P07
P06
P05
P04
P03
P02
P01
P00
Agc4
Agc3
Agc2
Agc1
DB[3]
DB[2]
DB[1]
Agc4
Agc3
Agc2
5
11
12
8
6
4
5
1
U7
YD
YC
YB
YA
74HC4066
XD
CONTD
XC
CONTC
XB
11
U9
CONTB
XA
4
I-
5
4
3
1
U10
R24
10K
U7
4
8
13
7
14
I-
11
I+
LM324M
R2in
R1in
T2out
6
2
12
Vcc
C34
100nF
C33
100nF
C32
10uF
13
Vcc
C30 +
100nF
6
R25
10K
R26
10K
6
R28
10K
R29
10K
Band Pass filter fo = 220Hz
14
V-
V+
T1out
MAX202E
R2out
R1out
T2in
T1in
C2-
C2+
C1-
C1+
C29
100nF
Note: Power Rail +5 - 0V
10
9
9
12
10
11
10
9
3
2
I+
LM324M
CONTA
8
C28
100nF
C27
100nF
DisplayCS
DisplayAD2
DisplayAD1
R22
10K
Vcc
5
13
R21
10K
Vcc
DB[0]
R19
10K
Vcc
Agc1
R20
10K
Disp2[1:7]
C38
100nF
4
R27
100K
C31
1nF
LCD Interface
3
2
3
2
R23
330K
C26
47nF
1
C35
100nF
C36
10nF
330K
R30
1
U11
IN
3
C37
100nF
J6
7
RS232
2
4
3
1
Copyright
ultratec 1999
7
Foresters House
Itton, Chepstow
Gwent. NP6 6BZ. UK
Ultrasound Technologies Ltd
AudioComplex {01}
RS232_Tx
RS232_Rx
ZR78L05G
OUT
R31
100K
ECN
176
178
182
Date
June 98
Sept 99
Nov 99
June 00
8
PD1 Plus Digital Signal Processor
Drawn:
Drg No:
Date: 6/11/00
6:54:10 PM
Name: PD1PLUS
Sheet 2
of 2
1
2
3
4
Issue
8
D
C
B
A
D
C
B
1
SK2
S
BSS138
Q1
D
R2
1K0
C2
1uF
Waveform
Data Output Socket
C1
100uF
2
1
+
Vcc
R1
3M3
J2
1
10BQ040
D1
Unit On / Off control
2
2
1
3
2
4
3
1
2
G
R4
22K
U1
1
Q
2
Q
C4
0u47F
2
C6
100uF
C5
68nF
R7
1M
+
R8
1M
13
Q
12
Q
CD4013
8
SET
11
CLK
9
D
10
RESET
CD4013
U1
6
SET
3
CLK
5
D
4
RESET
C3
10nF
R3
1M
Vcc
2
4
3
1
C8
100nF
VccSW
+
C12
10nF
C15
100uF
C14
100uF
VccSW
R14
1K0
5
6
7
8
C13
100nF
R13
10R
1
Vcco
Vcc
op
8
+
1
+
3
Tco
Is
Ib
Charge
7
3
Battery Low
P
M
LM386M
LM2907
U3
C17
10uF
R39
10K U2
5
gnd
OUT
U4
ZM33064Z
IN
C16
10uF
R16
4K7
R15
2K2
frequency to voltage converter
0.5V/KHz
R11
470R
2
1
+
C9
100nF
Loudspeaker
J4
SK
C7
0u47F
R10
1M
D2
BZX84C6V2
+
+
G1
Q2
RFD8P05SM
D
2
1
4
3
2
1
2
3
C10
470uF
VR2
20K
R18
68K
YEL_3MM
VccSW
D3
2
C20
68nF
C19
1nF
100nF
C18
4
VR3
20K
C21
100nF
C22
100nF
100K
R19
Volume Control
VR1
10K
4
1
U5
C25
470nF
I-
TL072
I+
5
2
+
1K0
R21
R23
100K
R22
100K
3
Q3
BC848B
C26
100uF
D4
BZX84C6V2
C24 +
100nF
R20
2K2
5
C
3
Battery Input
J1
3
Filtering
B
A
100K
R5
22K
R6
4K7
R17
1
R12
10R
2
3
2
E
1
10nF
C27
S
3
68K
R9
100uF
C11
+
6
4
7
U5
C28 +
100nF
Vrf
C29
100uF
I+
6
C32
470nF
I-
5
R25
22R
TL072
6
+
1K0
R26
R27
100K
G
C36
470pF
C33
100uF
100K
R28
C31 +
100nF
6
3
2
1
L1
0841
2
C40
22pF
L4 = 0839
L3 = 0874
C44,46 = 22pF
C42 = 220pF
C40,41 = 47pF
C37,38 = 22pF
Component
C46 = 47pF
C44 = 100pF
C43
100nF
C42
100pF
R33
1K5
R32
27K
Copyright
ultratec 1999
7
B
C41
220pF
Foresters House
Itton, Chepstow
Gwent. NP6 6BZ. UK
Ultrasound Technologies Ltd
8MHz
Frequency
C38 = 100pF
C40 = 100pF
Component
3
3
2
1
7
4MHz
10nF
C39
Frequency
R30
100K
R29
2K2
S
D
C38
47pF
C37
100pF
MMBF4416
Q4
2
10nF
C34
100R
R31
D5
BAT54
1
3
2
8
4
10K
R38
2n2F
C23
8
4
R24
100K
C30
470pF
2
Q6
MMBF4416
Q7
MMBF4416
3
3
G
G
R34
10R
2
1
2
Vrf
TxSig
C46
33pF
R37
100K
R36
100K
1
Issue
Receiver
3
1
C47
100nF
RxSig
TxSig
6
4
ECN
Transmitter
L2
0876
C45
100nF
6
4
8
8
J5
Nov 99
Date
RxSig
L4
0838
5
4
3
2
1
PD1 Vascular (5MHz)
Drawn: NAS
Drg No:
Date: 10/19/00
3:24:04 PM
Name: PD1VAS~1
Sheet 1
of 1
S
D
S
1
3
R35
10R
E
C
L3
0850
D
3
1
1
3
2
1
BC848B
Q5
D
C
B
A
D
C
B
J1
D1
TP7
1
2
1
SK2
S
BSS138
Q1
D
R2
1K0
Waveform
Data Output Socket
C1
100uF
+
Vcc
R1
3M3
J2
1
10BQ040
2
Unit On / Off control
2
1
1
3
2
4
3
1
2
G
C2
10nF
U1
R4
22K
U1
1
Q
2
Q
C4
0u47F
2
C3
100uF
C5
68nF
R7
1M
+
R8
1M
13
Q
12
Q
CD4013
8
SET
11
CLK
9
D
10
RESET
CD4013
6
SET
3
CLK
5
D
4
RESET
R3
1M
Vcc
G1
2
4
3
1
C8
100nF
VccSW
+
C12
10nF
C15
100uF
C14
100uF
R14
1K0
5
6
7
8
C13
100nF
R13
10R
1
Vcco
Vcc
op
8
3
Tco
Is
Ib
Charge
+
LM2907
TP5
1
3
Battery Low
P
M
LM386M
7
+
U3
C17
10uF
R39
22K U2
5
gnd
OUT
U4
ZM33064Z
IN
C16
10uF
R16
4K7
R15
2K2
frequency to voltage converter
0.5V/KHz
R11
470R
2
1
+
C9
100nF
Loudspeaker
J4
SK
C7
0u47F
R10
1M
D2
BZX84C6V2
+
+
D
3
VccSW
4
3
2
1
2
3
VR2
20K
100nF
C18
C6
220uF
YEL_3MM
+ +
R18
68K
C10
220uF
D3
2
C20
68nF
C19
1nF
TP4
4
VccSW
C21
100nF
4
VR3
20K
C22
100nF
100K
R19
Volume Control
VR1
10K
1
U5
C25
470nF
I-
TL072
I+
5
2
+
1K0
R21
R23
100K
R22
100K
3
Q3
BC848B
C26
100uF
D4
BZX84C6V2
C24 +
100nF
R20
2K2
5
C
3
Q2
FDN352AP
3
Vrf
7
U5
C28 +
100nF
TP1
Filtering
B
A
2
4K7
R17
1
3
1
E
2
10nF
C27
Battery Input
100K
R5
22K
R6
C29
100uF
I+
6
C32
470nF
I-
5
R25
22R
TL072
6
+
1K0
R26
R27
100K
C33
100uF
100K
R28
C31 +
100nF
6
C36
470pF
10nF
C34
S
2
68K
R9
100uF
C11
+
6
4
G
3
2
1
3
2
1
L1
0841
7
C40
47pF
MMBF4416
Q8
C43
100nF
C42
220pF
R33
1K5
R32
27K
Copyright
ultratec 2003
7
1
3
2
1
2
3
3
G
G
R34
10R
2
1
2
1
3
R35
10R
E
C
6
4
L3
0874
C46
22pF
Vrf
5
4
3
2
1
ECN
190
210
1
2
3
4
6
4
8
J5
Nov 99
Jan 02
Aug 02
Dec 05
Date
RxSig
L4
0839
C47
100nF
Issue
Receiver
3
1
R37
100K
R36
100K
RxSig
TxSig
Transmitter
L2
0876
TxSig
TP2
C45
100nF
6
4
8
PD1 Vascular (8MHz)
Drawn: NAS
Drg No:
100-0026-00
Date:
Name: PD1VAS8R5
Sheet 1
of 1
S
D
S
1
C44
47pF
2
3
D
R41
180K
C35
10nF
B
C41
22pF
Lodge Way
Portskewett, Caldicot
South Wales. NP26 5PS. UK
Ultrasound Technologies Ltd
R30
100K
TP3
R29
2K2
S
D
C38
22pF
C37
22pF
MMBF4416
Q4
1
3
1
3G
1
R40
10K
10nF
C39
2
S
100R
R31
1
D
R12
10R
TP6
8
4
10K
R38
2n2F
C23
8
4
R24
100K
C30
470pF
Q6
MMBF4416
Q7
MMBF4416
BC848B
Q5
D
C
B
A
D
C
B
4
3
2
1
Transducer Connector
J1
1
2
C1
100nF
7
U1
I-
TL072
I+
6
3
C4
1uF
1K0
R3
R5
100K
R4
100K
5
C
C5
100uF
3
D1
BZX84C6V2
C3 +
100nF
R2
2K2
1
3
1
E
2
10nF
C6
B
Q1
BC848B
1
U1
C7 +
100nF
Vrf
C8
100uF
4
I-
TL072
2
3
R7
22R
I+
C11
1uF
1K0
R8
R9
100K
C12
100uF
100K
R10
C10 +
100nF
G
C15
1nF
10nF
C13
4
5
3
5
2
1
R12
100K
R11
2K2
S
D
C17
330pF
C16
680pF
MMBF4416
Q2
3
0841
L1
(VR1)
1
2
3
C19
220pF
6
C22
100nF
C21
470pF
R15
1K5
R14
27K
R20
180K
S
D
Copyright
ultratec 2003
6
3
3
Vrf
G
G
6
4
6
4
1
2
3
4
5
Issue
158
181
ECN
RxSig
L4
0838
8
Date
March 98
15/05/98
18/01/99
18/05/00
12/05
Pocket Doppler Fetal Transducer 2MHz
3
1
C25
220pF
R19
100K
R18
100K
C26
100nF
TxSig
L2
0876
C24
100nF
7
7
8
Drawn: nas - utl Drg No: PD1D110-ASSY
Lodge Way
Portskewett, Caldicot
Date: 18/05/2000
South Wales. NP26 5PS. UK Name: FETALTDR_R5 Sheet 1
of 1
R16
10R
2
1
2
1
3
R17
10R
E
C
L3
0842
2
S
1
C23
1nF 2
3
D
3
1
1
C14
10nF
B
C20
220pF
Ultrasound Technologies Ltd
MMBF4416
Q6
3G
A
2
10nF
C18
2
S
100R
R13
1
D
1
8
4
R1
2K2
C2
100nF
8
4
R6
100K
C9
1nF
Q4
MMBF4416
Q5
MMBF4416
BC848B
Q3
D
C
B
A
D
C
B
J2
J1
1
Probe Switch
2
1
4
3
2
1
Transducer Connector
2
C1
100nF
7
U1
I-
TL072
I+
6
5
3
C4
1uF
1K0
R3
R5
100K
R4
100K
3
1
U1
C7 +
100nF
Vrf
C8
100uF
4
I-
TL072
2
3
R7
22R
I+
C11
1uF
1K0
R8
R9
100K
C12
100uF
100K
R10
C10 +
100nF
G
C15
1nF
10nF
C13
5
3
5
2
1
R12
100K
R11
2K2
S
D
C17
330pF
C16
680pF
MMBF4416
Q2
4
1
2
3
0841
L1
C19
220pF
6
C22
100nF
C21
470pF
R15
1K5
R14
27K
R20
180K
S
D
Copyright
ultratec 2003
6
3
3
Vrf
G
G
6
4
6
4
4
Issue
7
ECN
RxSig
L4
0838
8
8
Fetatrack 120 Transducer 2MHz
3
1
C25
220pF
R19
100K
R18
100K
C26
100nF
TxSig
L2
0876
C24
100nF
7
Drawn: nas - utl Drg No:
Lodge Way
Portskewett, Caldicot
Date:
South Wales. NP26 5PS. UK Name: FETALSEWARD_R4
Sheet 1
R16
10R
2
1
2
1
3
R17
10R
E
C
L3
0842
2
S
1
C23
1nF 2
3
D
3
1
1
C14
10nF
B
C20
220pF
Ultrasound Technologies Ltd
MMBF4416
Q6
3G
A
2
10nF
C18
2
S
100R
R13
1
D
1
8
4
R1
2K2
C2
100nF
8
4
R6
100K
C9
1nF
Q4
MMBF4416
Q5
MMBF4416
BC848B
Q3
10nF
C6
Date
of 1
12/05
D
C
B
A
D
C
B
1
2
C1
100nF
TP1
+
J2
5
2
100uF
C2
3
2
1
1
V1+
CAP-
GND
CAP+
U1
C3
10nF
SI7661
VO-
Unit On / Off control
D1
10BQ040
2
4
3
2
8
1
Q
2
Q
C4
10uF
+
C5
100nF
R2
100R
UnitShutDown {02}
CD4013
3
13
Q
12
Q
CD4013
U2
8
SET
11
CLK
9
D
10
RESET
probe_switch
U2
6
SET
3
CLK
5
D
4
RESET
R1
1M
R3
1M
4
J3
SK1
C6
1u0F
R4
1M
4
Loudspeaker
+
G1
Q1
RFD8P05SM
S
3
D
2
1
Battery Input
J1
3
2
1
2
4
3
1
C8
470uF
+
+
C7
100nF
47R
R5
C12
100nF
R6
10R
R7
22K
C13
10nF
C11
100uF
C10
100uF
5
5
+
8
C15
10uF
U3
5
C14
10uF
P
+
7
M
LM386M
1
AudioComplex {02}
R9
4K7
C18
100uF
100nF
C16
Volume Control
VR1
100K
100nF
C19
probe_switch
D2
BZX84C6V2
C17 +
100nF
R10
2K2
Q2
BC848B
Copyright
ultratec 2003
VSewardprobe
6
5
4
3
2
1
ECN
176
178
182
210
Issue
1
2
3
4
5
6
J4
Transducer
Power
Connector
C21
100uF
VSewardprobe
C20 +
100nF
7
8
Date
June 98
Sept 99
Nov 99
Jun 00
Aug 02
Jan 05
6
7
8
PD1 Plus s2 Audio Circuit
Drg No:
Drawn:
100-0002-00
Lodge Way
Date:
Portskewett, Caldicot
Sheet 1
of 2
South Wales. NP26 5PS. UK Name: PD1PLUS2
Ultrasound Technologies Ltd
2
3
BatteryCondition {02}
R8
12K
6
C
3
E
2
2
C9
100uF
+
6
4
1
3
1
A
1
B
D
C
B
A
D
C
B
A
13
1
Disp3[1:7]
15
14
12
J5
16
Disp3[6] 11
DispSym2
17
Disp3[1] 10
Disp3[7]
Disp3[5]
Disp3[4]
Disp3[3]
Disp2[7]
18
9
Disp3[2]
Disp2[3]
Disp2[4]
8
Disp2[1]
Disp2[5]
7
Disp2[2]
Disp2[6]
Disp1[5]
22
19
6
Disp1[7]
Disp1[4]
23
20
5
Disp1[6]
Disp1[3]
24
21
4
Disp1[1]
25 bp
2
3
Disp1[2]
26
1
DispSym1
C43
100nF
STR
FR
SCLK
SDO
Vcc
R
2
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
S39
S40
FR
CLK
DI
V6108
VSS1
VDD
Vlcd
D0
STR
R
S1
S2
S27
S26
S25
S24
S23
S22
S21
S20
S19
S18
S17
S16
S15
S14
S13
S12
S11
S10
S9
S8
S7
S6
S5
S4
S3
J6
D4
BZX84C2V7
fetal_signal_complex
Device Programming Interface
26
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
1
2
3
4
5
6
7
Vcc
C22
1nF
3
R12
68K
TP4
Reset
SDA
SCL
DispSym2
DispSym1
Disp3[7]
Disp3[6]
Disp3[5]
Disp3[4]
Disp3[3]
Disp3[2]
Disp3[1]
Disp2[7]
Disp2[6]
Disp2[5]
Disp2[4]
Disp2[3]
Disp2[2]
Disp2[1]
Fetal Complex
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46 Disp1[7]
47 Disp1[6]
48 Disp1[5]
49 Disp1[4]
50 Disp1[3]
51 Disp1[2]
52 Disp1[1]
1
11
I+
LM324M
I3
2
LowPass Filter (5Hz)
U5
4
FHR_Agc
R13
10K
100K
R11
BatteryCondition {01}
fetal_signal_complex
C25
10uF
UnitShutDown {01}
C23 +
100nF
R15
68K
bp
100nF
C24
U4
R14
47K
Disp2[1:7]
C44
100nF
DGND
AGND2
AGND1
PM
NC
VTRIM
VPP
RX1D-
RX1D+
TX1D-
TX1D+
POT2B
POT2A
POT1B
POT1A
OPIN+
OPIN-
OPOUT
SW1B
SW1A
ISRCIN
ISRCOUT
ADCI3
ADCI2
ADCI1
ADCI0
XTVREF
VDDA
VDD2
VDD1
1uF
C26
21
63
49
51
47
46
44
8
10
7
9
56
55
4
3
2
1
64
6
5
54
53
58
59
60
61
62
57
40
30
4
R16
22K
Disp1[1:7]
P00-T2IN
I-
11
I+
LM324M
4
5
6
INT1
INT0
CCU2
OSC1
OSC0
RESET
P37-SCL
P36-SDA
P35-T1IN
P34-CCU1
P33-CCU0
P32-T0IN
P31-RX0
P30-TX0
P27-SDI
P26-SDO
P25-SCK
P24-SS-
P23-CS0-
P22-CS1-
P21-CS2-
P20-CS3-
P17
P16
P15
P14
P13-PWM3
P12-PWM2
P11-PWM1
P10-PWM0
P03-RX1
P02-TX1
P01-T2EX
Precision Rectifier
7
BAS16
D3
U5
TP3
VMX1020
U6
10K
R17
4
20
50
19
35
36
52
48
45
43
42
41
39
38
37
29
28
27
26
25
24
23
22
34
33
32
31
18
17
16
15
11
12
13
14
C27
22pF
SCL
R19
10K
Vcc
Reset
R20
10K
Vcc
5
C28
22pF
11.05920MHz
X1
11 MHz Clock
SDA
SDO
SCLK
5
R18
10K
Vcc
C29
100nF
3
1
3
8
TP2
U5
STR
R
FR
R21
10K
Vcc
Vcc
I-
11
I+
LM324M
4
C31
1uF
R23
10K
10
9
R24
15K
6
11
R2in
I+
12
13
R1in
R1out
R2out
MAX202E
T1out
T2out
T1in
V-
V+
T2in
C2-
C2+
C1-
C1+
ILM324M
4
9
12
10
11
5
4
3
1
U7
Low Pass filter fo = 220Hz
U5
C33
100nF
C32
100nF
8
13
7
14
6
2
C37
100nF
C36
100nF
C39 +
100nF
AudioComplex {01}
C38
100nF
TP5
Vcc
7
Copyright
ultratec 2003
C40
10uF
7
C41
100nF
1
U8
IN
ZR78L05G
OUT
SK2
RS232
2
4
3
1
ECN
176
178
182
210
1
2
3
4
5
6
C42
100nF
Issue
3
8
8
PD1 Plus s2 Digital Signal Processor
Drawn:
Drg No:
Date:
Name: PD1PLUS2
Sheet 2
Vcc
RS232_Tx
RS232_Rx
Lodge Way
Portskewett, Caldicot
South Wales. NP26 5PS. UK
Ultrasound Technologies Ltd
C35
10nF
Processor Digital Pot is 30K
FHR_Agc
14
6
R25
100K
C34
1nF
LCD Interface
2
3
1
R22
330K
C30
47nF
330K
R26
1
R27
100K
Date
of 2
June 98
Sept 99
Nov 99
June 00
Aug 02
Jan 05
D
C
B
A
D
C
B
1
3
2
1
SK2
S
BSS138
Q1
D
R2
1K0
1
3
2
4
3
1
2
G
C2
10nF
auto off timer
R4
22K
R29
1K0
U1
1
Q
2
Q
+
2
C6
100uF
C5
68nF
R7
1M
probe_audio
C4
0u47F
R8
1M
13
Q
12
Q
CD4013
8
SET
11
CLK
9
D
10
RESET
CD4013
U1
6
SET
3
CLK
5
D
4
RESET
R3
1M
Vcc
Waveform / tape recording output
Data Output Socket
C1
100uF
+
Vcc
R1
3M3
J2
1
10BQ040
D1
Unit On / Off control
2
2
Q2
RFD8P05SM
J4
2
4
3
1
C8
100nF
VccSW
+
C12
10nF
C15
100uF
C14
100uF
VccSW
R14
1K0
5
6
7
8
C13
100nF
R13
10R
1
Vcco
Vcc
op
8
3
1
Tco
LM2907
Is
Ib
Charge
+
3
Battery Low
P
M
LM386M
7
+
U3
C17
10uF
R39
22K U2
5
gnd
OUT
U4
ZM33064Z
IN
C16
10uF
R16
4K7
R15
2K2
frequency to voltage converter
0.5V/KHz
R11
470R
2
1
+
C9
100nF
Loudspeaker
headset
SK1
C7
0u47F
R10
1M
D2
BZX84C6V2
+
+
D
2
1
G1
Battery Input
J1
4
3
2
1
2
3
C10
470uF
VR2
20K
R18
68K
YEL_3MM
VccSW
D3
C20
68nF
C19
1nF
100nF
CC18
100K
R19
4
VR3
20K
Volume Control
VR1
10K
4
Q3
BC848B
C26
100uF
5
1
U5
D4
BZX84C6V2
C24 +
100nF
R20
2K2
5
C25
470nF
I-
TL072
C28 +
100nF
2
3
+
1K0
R21
R23
100K
R22
100K
VccSW
I+
B
A
100nF
C35
100K
R5
22K
R6
2
C
3
E
1
S
3
68K
R9
3
Filtering
7
probe_power
C29
100uF
10nF
C27
2
3
2
100uF
C11
+
6
4
4K7
R17
1
R12
10R
2
3
2
8
4
10K
R38
2n2F
C23
6
U5
6
I+
6
5
C32
470nF
I-
TL072
8
4
10K
R24
1
+
1K0
R26
R27
100K
probe_audio
7
Copyright
ultratec 2003
7
Lodge Way
Portskewett, Caldicot
South Wales. NP26 5PS. UK
Ultrasound Technologies Ltd
100K
R28
probe_audio
10nF
C34
100nF
C22
100nF
C21
ECN
5
4
3
2
1
Date
8
J5
June 03
Fetatrack 120 series audio unit circuits
Drawn: NAS
Drg No:
Date:
Name: FETATR~1
Sheet 1
of 1
1
Issue
probe_audio
probe_power
8
D
C
B
A
Ultrasound Technologies Service Engineer Guide
To be used for work carried out on: PD1
Document contains information of signals at key points throughout the
specified product.
The following images are oscilloscope snap shots of signals acquired from the PD1 Audio
and Power control board.
DC signal, showing supply voltage of
9V
Location: J1 PIN 1
Dc Signal, showing supply voltage of
9V
Location: D1 PIN 1
Q2 DRAIN
U3 PIN 1
U1 PIN 1
UNIT SWITCHED ON
Q2 GATE
U3 PIN 3
U1 PIN 1
UNIT SWITCHED OFF
U1 PIN 2, UNIT SWITCHED ON
U1 PIN 3 UNIT SWITCHED ON
U1 PIN 4 & 6 = GND
U1 PIN 2 OFF, UNIT SWITCHED OFF
U1 PIN 3 UNIT SWITCHEDOFF
U1 PIN 5 UNIT SWITCHED ON
U1 PIN 5 UNIT SWITCHED OFF
U1 PIN 7 & 8 = GND
U1 PIN 9 UNIT SWITCHED ON
U1 PIN 9 UNIT SWITCHED OFF
U1 PIN 10 UNIT SWITCHED ON
U1 PIN 11 UNIT SWITCHED ON
U1 PIN 12 UNIT SWITCHED ON
U1 PIN 10 UNIT SWITCHED OFF
U1 PIN 11 UNIT SWITCHED OFF
U1 PIN 12 UNIT SWITCHED OFF
U1 PIN 13 = FLOATING
U1 PIN 14 UNIT SWITCHED ON
U1 PIN 14 UNIT SWITCHED OFF
U2 PINS 2 & 4 = GND
U2 PIN 1STROKING FACEPLATE
U2 PIN 3 STROKING FACEPLATE
U2 PIN 6 SUPPLY
U2 PIN 8 STROKING FACEPLATE
U2 PIN 5 STROKING FACEPLATE
U2 PIN 7
SK1 PINS 2, 3 & 4 STROKING FACEPLATE
PIN 1 = GND
J4 PIN 1 SUPPLY TO TRANSDUCER
J4 PIN 4 STROKING FACEPLATE
SIGNAL FROM TRANSDUCER
THE FOLLOWING IMAGES ARE SIGNALS TAKEN
FROM THE POCKET DOPPLER FETAL TRANSDUCER
2MHZ.
Q1 COLLECTOR
Q1 BASE
Q1 EMITTER,
VRF
TRANSMITTER CIRCUIT
Q2 DRAIN
TRANSMITTER CIRCUIT,
Q2 SOURCE
TRANSMITTER CIRCUIT
Q3 COLLECTOR
( Q2 GATE = GND )
TRANSMITTER CIRCUIT
Q3 BASE
TRANSMITTER CIRCUIT
L2 PIN 1
TRANSMITTER CIRCUIT
L2 PIN 3
RECEIVER CIRCUIT
Q5 GATE
RECEIVER CIRCUIT
Q4 GATE
TRANSMITTER CIRCUIT
TRANITTED SIGNAL
L2 PIN 4
RECEIVER CIRCUIT
Q5 DRAIN
RECEIVER CIRCUIT
Q4 DRAIN
RECEIVER CIRCUIT
Q6 DRAIN
RECEIVER CIRCUIT
Q6 SOURCE
TRANSDUCER RECEIVER CIRCUIT
U1 PIN 2
RECEIVER CIRCUIT
Q6 GATE
TRANSDUCER RECEIVER CIRCUIT
U1 PIN 1
TRANSDUCER RECEIVER CIRCUIT
U1 PIN 3
TRANSDUCER RECEIVER CIRCUIT
U1 PIN 5
TRANSDUCER RECEIVER CIRCUIT
U1 PIN 6
TRANSDUCER RECIEVER CIRCUIT
U1 PIN 7
TRANSDUCER RECEIVER OUTPUT TO AUDIO
BOARD
J1 PIN 4
Ultrasound Technologies Ltd
Lodge Way
Portskewett
Caldicot
NP26 5PS
United Kingdom
Tel: 01291 425425
Fax: 01291 427093
Email: [email protected]
Web: www.doppler.co.uk