Download - Frank`s Hospital Workshop

Ultratec PD1 SERIES
Pocket Doppler
SERVICE MANUAL
CONTENTS
1.
2.
3.
4.
5.
6.
7.
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
Description of the Instrument
2.1. Audio Unit. PD1
2.2. Audio Unit PD1+
2.3. Dismantling Instructions
2.4. Audio Unit
2.5. 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. PD1+ Audio Unit PCB Assembly
6.2. PD1 Audio Unit PCB Assembly
6.3. PD1 2MHz Transducer assembly
6.4. PD1 General Assembly
6.5. PD1+ General Assembly
Drawings and Circuit Diagrams
7.1. PD1 Audio PCB Layout
7.2. PD1+ Audio PCB Layout
7.3. PD1 2MHz Transducer Assembly
7.4. PD1 Audio PCB Circuit Diagram
7.5. PD1+ Audio PCB Circuit Diagram
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 2
1. General Introduction
1.1. 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.,
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 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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 3
1.1
Re - Order Information
Listed 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 IEC601
and B.S.5724.
IEC Symbol 878-02-02
Type B Equipment.
IEC Symbol 348
Attention Consult accompanying documents
Serial DATA Out
Headset Output
Volume Control
Rear View of PD1 / PD1+
Showing additional
symbols
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 4
1.3
CE Mark
This product complies with the essential requirements of the European Council Directive
93/42/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. This
product is allowed in domestic establishments under the jurisdiction of a Healthcare
professional.
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 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. The
address can be found in the front of this manual.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 5
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 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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 6
2.2. Audio Unit PD1+
The following functions are found on the PD1+ Pocket Dopplers (refer to page 3 of your
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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 7
2.3. Dismantling Instructions
Special Note: -The instrument must not be dismantled when in use on a patient, ensure all
accessories are disconnected.
2.4. Audio 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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 8
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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 9
1.5
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 cynoacrylic 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).
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 10
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 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.
2.3
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.
2.4
Ultrasound Transducer
The ultrasound transducer operates on the continuous 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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 11
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 continuous 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.
2.5
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 sinewave 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.
2.6
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.
2.7
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.
2.8
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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 12
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 the
power supply circuits then it is recommended that the whole test / calibration procedure is
undertaken.
3.2
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.
3.3
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
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 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
File – shawn/PD1 Service Manual
Issue 1 April 1999
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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.
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 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.
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.
3.6
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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 14
4.0 Fault 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
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.
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 15
5.0 Parts 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
5.1
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
C2,9,11,12,13,18,19,21,27,28,29,30,32,3
3,34,35,37
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
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 16
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,
28,29
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
File – shawn/PD1 Service Manual
1
Tsubuya 161P-N2, A10K
VR1
1
Tsubuya 1KF-4B Black
Knob
VR1 knob
1
Hosiden HSJ 1501-010010
P1,2
2
1
Molex 39-51-4032
PD1D109
Issue 1 April 1999
J2
1
1
Page 17
5.2
PD1 Audio PCB Assembly
Device
Capacitor
Capacitor
Value
470uF Electrolytic Axial
10V
Device Type
Panasonic SU
ECEB1AU471
100uF Min Electrolytic 16V Nippon Chemi-con SRA /
5mm
Samsung SSM
Circuit Reference
Quantity
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
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
File – shawn/PD1 Service Manual
Hosiden HSJ 1501-010010 P1,2
2
1
Molex 39-51-3032
PD1 Audio PCB
Issue 1 April 1999
J2
1
1
Page 18
5.3
PD1 2MHz Transducer Assembly
Description
Capacitor
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
File – shawn/PD1 Service Manual
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2
Issue 1 April 1999
Page 19
Faceplate
PD1D102
1
Probe Cover
PD1D101
2
M3 x16 Pozi C'sk screw
1
M3 Full nut
1
Cover plug
2
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 20
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
M4 x 12 Pozi Pan screw
3
Fibre flat washer
2
Cable tie
1
PVC Foam based adhesive strip
0.1
Serial number label
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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 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
0.1
Serial number label
File – shawn/PD1 Service Manual
1
Issue 1 April 1999
Page 22
6.0 Circuit Diagrams & Engineering Drawings
The 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
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 23
PD1 Audio PCB Layout
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 24
PD1+ Audio PCB Layout
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 25
PD1 Probe PCB Layout
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
PD1 General Assembly
PD1+ GA
2MHz Transducer Assembly
File – shawn/PD1 Service Manual
Issue 1 April 1999
Page 32