Bistos BT-300 Service manual

BT-300 Service Manual V2.0

Table of Contents

TERMS OF WARRANTY................................................................3

CAUTION.........................................................................................3

HOW TO CONTACT US ….............................................................4

DEFINITION OF WARNING, CAUTION, NOTE.............................6

GENERAL PRECAUTION ON ENVIRONMENT............................7

GENERAL PRECAUTION ON ELECTRIC SAFETY.....................8

SECTION 1. GENERAL INFORMATION .................9

1.1 Product Overview....................................................................9

1.2 Product Features...................................................................10

1.3 Product Configuration..........................................................10

SECTION 2. TECHNICAL DESCRIPTION...................................11

2.2 Main Unit.................................................................................12

1.2. Composition.........................................................................12

2.2. Main Board..........................................................................13

2.2.3Key Board.............................................................................25

2.3Doppler Probe.........................................................................26

2.3.1 Composition.......................................................................27

2.4UC Probe................................................................................27

2.4.1 Composition.......................................................................27

2.4.2 Technical Description.........................................................28

SECTION 3. TROUBLESHOOTING.............................................30

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BT-300 Service Manual V2.0

3.1 Warning Sign Occasion and Status Checking...................30

Alarm Occasion and Status Checking Up.................................31

3.2 Troubleshooting on the Other Situation.............................31

SECTION 4. MAINTENANCE AND CLEANING..........................33

4.1 Maintenance and Cleaning...................................................33

Caution....................................................................................34

4.2 Regular Inspection................................................................34

SECTION 5. SPECIFICATIONS....................................................35

2

BT-300 Service Manual V2.0

Terms of Warranty

- This product is manufactured and examined by strict quality control and

inspection system.

- Compensation standard concerning repair, replacement and refund of the

product complies with “Consumer’s protection law” issued by Economic

Planning Dept.

- BT-300 is guaranteed by BISTOS Co., Ltd. And its warranty period is two

years from the date of purchase.

- Warranty repair or replacement will be made by BISTOS Service Center

with free of charge during warranty period if properly used under normal

condition in accordance with the instructions for use.

- In the event of a malfunction or failure during warranty period, customer

should inform BISTOS Co., Ltd. of the model name, serial number, date

of purchase and explanation of failure about the defective equipment.

3

Caution

Federal law restricts this device to sale by

or on the order of a physician

BT-300 Service Manual V2.0

How to contact us …

4

BT-300 Service Manual V2.0

5

BT-300 Service Manual V2.0

Definition of Warning, Caution, Note

6

You can contact us the following address and telephone numbers

for services and supplies.

Oversea Sales Team

BISTOS Co., Ltd.

Product and

Order Inquiries

Service

Request

and

Technical

Support

201, 2F, 239-15, Gasan-Dong,

Geumcheon-Gu, Seoul, Korea

Tel : +82-2-862-0642

Fax: +82-2-862-0644

Customer Service Team

BISTOS Co., Ltd.

201, 2F, 239-15, Gasan-Dong,

Geumcheon-Gu, Seoul, Korea

Tel : +82-2-862-0642

Fax: +82-2-862-0644

Our Website &

Email address

Website: http://www.bistos.co.kr

Email: bistos@bistos.co.kr

BT-300 Service Manual V2.0

 For a special emphasis on agreement, terms are defined as

listed below in operation manual. Users should operate the

equipment according to all the Warning and Caution

instructions.

 Manufacturer or Sales agency takes no responsibility for any

kind of damage or breakdown that is caused by misuse and

failure to maintain the equipment.

Warning

A Warning indicates a potentially hazardous situation which, if not avoided, could result in death or serious injury.

Caution

A Caution indicates a potentially hazardous situation which, if not avoided, may result in minor or moderate injury.

Note

A Note indicates a particular point of information; something on which to focus your attention.

General Precaution on Environment

 Do not keep or operate the equipment under the environment

listed below.

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BT-300 Service Manual V2.0

General Precaution on Electric Safety

Check the items listed below before operating the equipment.

- Be sure that power supply line is appropriate to use.

(Power Adaptor Input: 100 ~ 250V AC, Power Adaptor Output: 16V,

2.8A).

- Be sure that the entire connection cable of the system is properly

8

Avoid placing in an area exposed to moisture. Do not touch the equipment with wet hand.

Avoid placing in an area where there is a high variation of temperature. Operating temperature

ranges from 10°C to 40°C. Operating humidity

ranges from 30% to 85%.

Avoid exposure to direct sunlight

Avoid in the vicinity of Electric heater

Avoid placing in an area where there is an excessive humidity rise or ventilation problem.

Avoid placing in an area where chemicals are stored or where there is in danger of gas leakage.

Do not disjoint or disassemble the equipment. BISTOS Co., Ltd. takes no responsibility of it

Avoid placing in an area where there is an excessive shock or vibration.

Avoid dust and especially metal material into the equipment.

Power off when the equipment is not fully installed. Otherwise, the equipment could be

BT-300 Service Manual V2.0

and firmly fixed.

Note

The equipment should not be placed in the vicinity of electric generator, X-ray, broadcasting apparatus to eliminate the electric noise during operation. Otherwise, it may cause incorrect result. Self-power line is important for BT-300. To use the same power source with other electric instruments may cause incorrect result.

Note

BT-300 is classified as listed below;

- This equipment conforms to Class I, Type-BF.

- Do not use the equipment in the vicinity of flammable

anesthetics and solvents.

- The equipment conforms to Class I according to IEC/EN 60601-1 (Safety of Electric Medical Equipment)

- This equipment conforms to Level B according to IEC/EN 60601-1-2 (Electromagnetic Compatibility Requirements)

Note

Accessory equipment connected to the analog and digital interfaces must be certified according to the respective IEC standards ( e.g. IEC 950 for data processing equipment and IEC 601-1 for medical equipment ). Furthermore all configurations shall comply with the system standard EN 60601-1-1:1993. If in doubt, consult the technical service department or your local representative.

Section 1. General Information

1.1 Product Overview

BT-300 is the fetal monitor that measures the fetal heart rate(FHR) which may be evaluated to predict fetal status and uterine contraction. BT-300 irradiates ultrasound wave to the abdomen of a pregnant woman, and detects the Doppler frequency signal reflected from the heart of the fetus. BT-300 analyzes this signal and displays the heart rate by LED. Also, BT-300 provides the sound from the

9

BT-300 Service Manual V2.0

heart of fetus.

BT-300 measures the uterine contraction of a pregnant woman by pressure sensors and displays the numerical values.

And BT-300 prints the heart rate of the fetus and the values of

uterine contraction.

1.2 Product Features

 BT-300 records the heart rate of the fetus, the uterine contraction

of a pregnant woman, and basic information of the equipment

with a provided thermal printer.

 BT-300 is capable of Monitoring of fetal heart rate with one or two

pulsed Ultrasound Transducer(s).

 BT-300 can record automatically with thermal printer through

printer setup.

 BT-300 is compact and light, potable and easy to use.

 BT-300 uses a free voltage(100 – 240VAC input) power adaptor.

1.3 Product Configuration

BT-300 system consists of the followings. Unpack the package and

check out the following items. Also, be sure to check to see any

damage of main body and accessories

① BT-300 Main Body

② Ultrasound Transducer(Doppler Probe) - 2 EA(1 EA for BT-300S)

③ Tocotransducer(UC Probe) - 1EA

④ Event Marker -1EA

⑤ Thermal Print Paper - 2EA

⑥ Power Adaptor -1EA

⑦ Power Cord -1EA

⑧ Ultrasound Gel -1EA

⑨ Abdominal Transducer(Probe) Belt -3 EA(2 EA for BT-300S)

⑩ User’s Manual -1EA

Contents Name Description

10

BT-300 Service Manual V2.0

BT-300 Main

Body

Main body of BT-300

(2-year Warranty)

Doppler Probe

Ultrasound Transducer for

Measuring FHR

UC Probe

Pressure Sensor(Tocotransducer)

for Measuring Uterine contraction

Event Marker

Used for a specific event(for

example, fetal Movement)

Z-folded type

Paper

Z-folder type thermal Paper

Probe Belt

Used for Holding Doppler Probe

and/or UC Probe

Power Adaptor

Adaptor for transform AC Power to

DC 16V

Power Cord

AC Power cord

Ultrasound Gel

Ultrasonic coupling gel

Section 2. Technical Description

2.1 General

BT-300 is capable of monitoring fetal heart rate and maternal

uterine contractions. Simultaneous trends of fetal heart rates (FHR)

and uterine activity (UA) are plotted by the built-in chart recorder.

FHR and UA are displayed continuously at numeric display on the

front panel.

Measuring fetal heart rate is using 1MHz ultrasound wave which

transmits the burst pulse to the 7 ultrasound sensors about 3.47KHz

periodically. This wave is reflected to the part of different medium.

11

BT-300 Service Manual V2.0

Particularly, the reflection wave is shifted from moving targets like

heart, blood, etc. This phenomenon is a Doppler effect. This

reflected signal is converted to electrical signal and it can get some

useful information by many other processes.

Also, BT-300 measures the uterine contraction of a pregnant woman

by pressure sensors and displays waveform by means of numerical

values. This waveform informs the period and magnitude of the

uterine contraction.

DSP(digital signal processor) calculates the fetal heart rate and

uterine contraction, and transmits them to CPU by serial

communication.

CPU displays these values to the 7-segment, records on the thermal

paper and transmits to serial port for central monitoring system.

CPU performs these operations by input of key.

Refer to the operator’s manual for more detailed operations.

2.2 Main Unit

1.2. Composition

12

①

BT-300 Service Manual V2.0

① Key Board ② Print Engine ③ Main Board

2.2. Main Board

 Circuit Diagram

< Analog Part >

13

② ③

BT-300 Service Manual V2.0

A V P 1 2

C 2 8

U C _ I D

D O P 1 _ Q

R 1 0

R 5 3

-

+

U 3 C

T L 0 6 4

1 0

9

8

4 1 1

R 7 3

V O L 2 _ 2

A V P 1 2

-

+

U 4 D

T L 0 6 4

1 2

1 3

1 4

4 1 1

A V P 1 2

G 4

1

C 3

C 4 6

A V P 5

D O P 2 _ S

C 2 7

D 3

C 3 8

D 1 _ R E F

R 4 3

G 3

1

R 3 4

A V P 5

R 5 8

D O P 1 _ H R

A V P 1 2

R 4 1

R 5 9

Q 1

C 5

+

-

U 7 A

T L 0 6 4

3

2

1

4 1 1

R 7 1

R 3

D O P 2 _ I

A V P 5

R 2 2

R 8 2

R 6 6

R 1 3

R 4 5

R 6 5

R 3 9

C 1 4

R 1

R 1 9

U 1 0

7 8 L 0 5

1 3

2

O U T I N

G N D

R 3 6

C 3 9

C 1 7

C 8

R 8 4

R 2

+

C 5 9

D 7

U 2

D G 2 1 2

2 1 5 1 0

7

3 1 4 1 1

6

1 1 6 9 8

1 3 4 1 2 5

D 1 D 2 D 3 D 4

S 1 S 2 S 3 S 4

I N 1 I N 2 I N 3 I N 4

V +

V V C C G N D

D 2

C 3 7

-

+

U 4 A

T L 0 6 4

3

2

1

4 1 1

L 1

A V P 5

R 1 6

R 3 0

R 4 2

R 7 6

D 6

D 5

R 1 1

C 5 0

S T I M U L A T O R

A V P 5

C 2 3

C 1 5

D 9

R 4 9

C 3 0

C 7

R 4 0

R 3 1

V O L 1 _ 0

+

C 4 7

R 3 3

J 5

A N A L _ S I G

246

8

135

7

R 2 0

C 3 2

A V P 1 2

C 4 9

R 7 5

R 6 4

D O P 2 _ H R

C 2 6

-

+

U 1 D

T L 0 6 4

1 2

1 3

1 4

4 1 1

R 3 7

R 6 3

C 3 3

A V P 5

C 4 0

C 5 6

Q 5

R 1 7

Q 2

C 4 4

A V P 5

G 2

1

-

+

U 6 B

T L 0 6 4

5

6

7

4 1 1

C 4 3

A V P 5A V P 5

A V P 5

-

+

U 4 B

T L 0 6 4

5

6

7

4 1 1

D O P 1 _ I

A V P 5

C 3 5

A V P 1 2

C 1 9

R 7 8

V O L 2 _ 0

R 6 7

R 2 6

A V P 5

C 6 2

R 5 4

R 4 7

R 5 6

Q 4

C 5 5

R 1 4

J 1

L M B 0 5 0 9 - 6 P

1 2 3 5 6

8N 1 N 2 N 3

-

+

U 3 A

T L 0 6 4

3

2

1

4 1 1

C 2 2

+

-

U 7 C

T L 0 6 4

1 0

9

8

4 1 1

+

C 6 4

R 3 5

+

C 5 8

C 9

R 7

J 3

A N A L _ C O N

246

8

135

7

R 5 0

U C

M A R K

G 6

1

+

C 5 1

R 6 8

R 2 5

C 1 1

D O P 2 _ P

R 1 6 5

R 3 2

L 2

C 6 1

C 2 0

C 3 4

R 5 5

C 4 1

D O P 1 _ I D

A V P 5

J 6

5 2 6 7 - 2

1 2

-

+

U 1 B

T L 0 6 4

5

6

7

4 1 1

J 2

L M B 0 5 0 9 - 6 P

1

2

3

5

6

8N 1 N 2 N 3

( M A R K J A C K )

R 8 3

C 1 6 9

I V P 1 6

R 6 1

A V P 1 2

R 7 7

J 7

L M B 0 5 0 9 - 6 P

1

2

3

5

6

8N 1 N 2 N 3

R 8 1

R 4

C 5 2

A V P 1 2

R 2 8

-

+

U 3 B

T L 0 6 4

5

6

7

4 1 1

C 3 6

R 8 0

A V P 1 2

R 1 5

A V P 1 2

R 5 2

C 1 0

A V P 5

G 5

1

+

C 1

+

-

U 7 D

T L 0 6 4

1 2

1 3

1 4

4 1 1

A V P 1 2

C 1 7 0

C 3 1

V O L 1 _ 1

C 1 8

R 1 8

A V P 1 2

J 8

H T J - 0 3 5 - 1 0

1 2

V O L 2 _ 1

R 2 7

C 2

C 4

G 1

1

C 6 0

J 4

T R A N S D U C E R

2 4 6 8

1 3 5 7

R 8

A V P 5

D O P 1 _ S

C 4 2

D 8

R 4 4

R 2 4

D 1

Q 3

A V P 5

R 7 2

-

+

U 6 A

T L 0 6 4

3

2

1

4 1 1

R 1 2

V O L 1 _ 2

A V P 5

C 4 8

R 9

R 5

R 7 4

R 7 0

C 2 4

-

+

U 3 D

T L 0 6 4

1 2

1 3

1 4

4 1 1

U 5

C D 4 0 5 1 B

6

1 6

7

3

1 1 1 0

9

1 3 1 4 1 5 1 2

1 5 2 4

I N H

V D D V E E

O / I

A B C

I / O 0 I / O 1 I / O 2 I / O 3 I / O 4 I / O 5 I / O 6 I / O 7

A V P 1 2

C 6

C 2 5

D O P 2 _ Q

P C B - 1 0 0 - M A I N - P 0 3 C

B T 3 0 0 D / S A N A L O G C I R C U I T b y R & D d e p t . b is t o s . c o . l t d .

C

1 2, 1 0 2 0 , 2 0 0 3월 요 일 월

T i t le

S iz e D o c u m e n t N u m b e r R e v

D a t e : S h e e t o f

R 2 1

R 7 9

G 7

1

-

+

U 6 C

T L 0 6 4

1 0

9

8

4 1 1

R 2 3

A V P 5

C 6 5

C 5 3

C 6 3

C 5 4

A V P 5

R 6 9

C 1 2

R 4 6

I V P 1 6

R 6 0

U 9 L M 7 8 1 2

1

2

3

V I

G N D

V O

A V P 5

D O P 2 _ I D

A V P 5

D 1 _ R E F

D O P 1 _ S

C 2 9

R 6

D O P 1 _ P

C 2 1

C 1 3

+

C 5 7

R 4 8

C 4 5

-

+

U 1 C

T L 0 6 4

1 0

9

8

4 1 1

D O P 2 _ S

D 4

R 3 8

R 5 7

P W M

-

+

U 4 C

T L 0 6 4

1 0

9

8

4 1 1

R 6 2

C 1 6

R 2 9

-

+

U 1 A

T L 0 6 4

3

2

1

4 1 1

-

+

U 6 D

T L 0 6 4

1 2

1 3

1 4

4 1 1

U 8

T D A 2 0 3 0

1

2

3

4

5

R 5 1

< Digital Part >

14

BT-300 Service Manual V2.0

/ I D D _ R D

D 7

V 1 2 8

1

R 1 0 9

C 1 4 2

V 5 1

1

V 7 7

1

M A R K

D V P 5

P D 5

V 9 4

1

V 1 2 3

1

U 4 2 B

7 4 H C 7 4

1 2

1 1

9 8

1 0

1 3

D

C L K

Q Q

P R E

C L R

V 7 5

1

V 3 5

1

D V P 5

P D 5

C 1 0 1

+

C 1 5 0

C 1 6 7

U 2 3

1 5 . 7 6 M H z O S C (5 V )

1234

N C

G N DO U T

V C C

S E G E 1

C 1 2 2 1 0 4

U 2 5

M C P 3 2 0 4 -B I / S L

1 2 3 4 5 6 7

1 4 1 3 1 2 1 1 1 0 9 8

C H 0 C H 1 C H 2 C H 3 N C N C D G N D

V D D V R E F A G N D

C L K D O U T

D I N

C S / S H D N

A D C _ R

S E G _ A

P D 4

C 9 4

S E G E 7

C 7 3

R 9 6

V 7 6

1

U 3 8 B 7 4 H C 3 9 3

1 3

1 2

1 1 1 0

9 8

1 4

7

A

C L R

Q A Q B Q C Q D

V C C

G N D

J 1 2

6 P

1 2 3 4 5 6

D O P 1 _ Q

P V P 2 4

S T R O B E 1

P D 4

V 4 3

1

U 2 4

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

M O T O R _ C K 1

1 5 . 9 7 4 4 M

8 K

P D 4

V 8 5

1

C 7 0

G A T E 1

S E G _ V 7

S E G E 5

A L M / R E C

U C _ R E F

/ P R N C _ W R

R 1 1 3

U 1 7

M M 1 0 7 5

1 2 3 4 5

6

7

8

T C R E S E T C K G N D V C C

R C T

V s

R E S E T

U 3 4 , 1 4 P

C 1 2 1

U 1 9

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

C 1 0 2

J 1 3

H E A D E R 2 0 X 2

2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0

1 3 5 7

9 1 1 1 3 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 3 3 3 5 3 7 3 9

L E D _ H 1 G

D 4

1 5 . 9 7 4 4 M

R 1 2 7

V 1 1 6

1

V 5 8

1

I N I _ E N

R T C _ A S

V 6 6

1

S E G E 3

P D 0

U 4 0 C

7 4 H C 0 8

9

1 0

8

D O P 2 _ I D

D V P 5

A D C _ C S

V 8 9

1

V 4 0

1

Q 1 1

D V P 5

S T R O B E 0

P D 7

U 4 0 D

7 4 H C 0 8

1 2

1 3

1 1

R 1 1 4

D O P 1 _ P

D V P 5

P D 1

R 1 5 3

V 6 5

1

V 8 7

1

J 1 5

H T J - 0 2 0 -0 4

1

23

C 1 0 4

( SM D )

R T C _ R / W

P D 3

P D 0

P D 4

V 1 0 1

1

U 3 2 D

7 4 H C 0 8

1 2

1 3

1 1

C 1 4 0

R 9 1

S E G E 2

C 1 1 5

D V P 3 . 3

R S _ D S P

D 5

S E G _ V 3

D U A L

C 1 3 0

V 1 0 9

1

P V P 2 4

D 3

V P P

2 K

R 1 1 2

R 8 9

R 1 5 2

P V P 2 4

U 4 2 ,1 4 P

R X _ Q

J 1 8

D U A L / S I N G L E

1 2

U 1 5

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

U 4 1 B

7 4 H C 0 8

4

5

6

V 4 4

1

D V P 5

T X

T P H _ C K

P D 6

P A P E R

P D 5

V 4 8

1

V 7 8

1

I V P 1 6

S E G _ V 1

C 1 6 4

R 9 8

U 2 9 P Q 2 C F 1

4

2

3

5

1

V c

V I N

G N D

F B

S W

V 9 6

1

A N A _ R S

R X _ I

S E G _ C

C 1 4 6

C 7 6

V 8 61V 7 3

1

V 1 3 0

1

V 8 1

1

C 1 1 7

D V P 5

D 3

V 1 0 81V 1 1 9

1

/ A N A _ R S

R 1 3 5

4 . 7 K

C 1 0 9

V 4 1

1

C 6 8

V 4 6

1

V 9 5

1

R 9 9

R 1 6 8

V 8 0

1

D 0

2 K

L E D _ H 1 R

P D 4

U 3 4 A

7 4 H C 7 4

235

6

4

1

D

C L K

Q Q

P R E

C L R

U 4 1 A

7 4 H C 0 8

1

2

3

C 9 0

A D C _ C S

L E D _ A L M / R E C

1 M

P D 7

U 3 3 B 7 4 H C 3 9 3

1 3

1 2

1 1 1 0

9 8

1 4

7

A

C L R

Q A Q B Q C Q D

V C C

G N D

C 7 2

U 3 1

L M 1 1 1 7 M P X- 3 . 3

312

4

I N

G N D / A D J

O U T 4

V 6 2

1

U 4 0 A

7 4 H C 0 8

1

2

3

D V P 5

V O L _ U P 2

2 K

P D 0

P D 2

U 3 7 C

7 4 H C 0 8

9

1 0

8

C 9 3

L E D _ A L M

C 1 2 9

U 3 0

7 4 H C 2 4 5

2 3 4 5 6 7 8 9

1 9

1

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1

2 0 1 0

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7

O E

D IR

B 0 B 1 B 2 B 3 B 4 B 5 B 6 B 7

V C C G N D

C 1 1 0

S E G _ E

V 9 7

1

R 1 3 7

4 . 7 K

C 1 3 4

R 1 1 8

C 1 3 5

D V P 5

A L M / R E C

L E D _ A L M S E G _ V 2

D 2

/ T P H _ L E

C 1 3 8

U 3 7 B

7 4 H C 0 8

4

5

6

V 1 2 1

1

C 1 3 1 1 0 4

D V P 5

S T R O B E 1

P D 7

V 8 8

1

V 1 1 7

1

V 3 9

1

U 3 7 ,1 4 P

T X

P D 5

V 3 3

1

Q 6

S E G _ V 1

L E D _ H 2 R

I F _ S D O

P D 6

Q 1 0

R 1 5 7

C 9 5

J 1 0

P I C D / L R S T

132

4

D V P 3 . 3

P D 7

G A T E 1

P D 4

C 8 0

R 1 4 8

V 7 9

1

C 7 4

/ S E G E _ W R

G A T E 2

V 1 2 2

1

D V P 1 .8

D V P 5

P D 3

V 3 8

1

R 1 0 7

C 1 4 1

U 3 5

L M 2 5 7 6 S - 5 . 0

2

1

345

V O U T

V I N

G N D

F B

S W

S T I M U L A T O R

A D C _ R

A N A _ R S

V O L _ U P 1 /A L M

I F _ S C K

P D 2

U 2 2 A 7 4 H C 0 4

1 2

1 47

R 1 3 6

4 . 7 K

U 4 1 C

7 4 H C 0 8

9

1 0

8

U 4 1 ,1 4 P

M C K 0

D 1

M O T O R _ C K 0

I F _ S D O

1 M

S E G _ V 6

S E G _ V 7

P D 6

P D 2

V 7 2

1

U 1 2 A

7 4 H C 0 4

12

1 47

V 8 4

1

C 1 0 5

U 3 2 A

7 4 H C 0 8

1

2

3

D 5

S E G _ V 5

4 K

P D 3

P D 7

P D 2

P D 3

U 4 2 A

7 4 H C 7 4

235

6

4

1

D

C L K

Q Q

P R E

C L R

C 8 3

U 3 9 B

7 4 H C 0 4

34

C 6 9

V O L 2 _ 1

D V P 3 . 3

P D 0

C 1 6 6

C 1 6 2

U 3 2 B

7 4 H C 0 8

4

5

6

P A P E R

P D 0

C 1 3 2

V 6 8

1

R 1 6 1

R 9 7

+

C 1 4 7

V O L 1 _ 1

/ T P H _ L E

L E D _ I N F O

V 7 4

1

R 1 2 1

C 1 5 5

R 1 5 0

C 1 2 4

V 1 1 3

1

C 1 0 3

L E D _ H 2 R

S T R O B E 0

L E D _ A L M /R E C

/ S E G V _ W R

P D 5

U 1 1

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

R 1 3 4

4 . 7 K

U 1 2 C

7 4 H C 0 4

5 6

1 4

7

V O L 1 _ 0

4 K

1 5 . 9 7 4 4 M

R 9 5

J 1 4

5 2 6 7 - 212

R 8 5

C 1 5 4

C 1 4 5

/ S E G D _ W R

/ K E Y D _ R D

/ V O L D _ W R

/ A N A _ R S

P D 6

C 8 9

C 6 7

R 1 3 9

V 5 5

1

D V P 5

S E G E 7

1 M

S E G _ E

P D 6

C 1 1 6

L 4

R 1 4 9

L 5

V O L 2 _ 2

D V P 5

I F _ S C K

S E G _ V 3

P D 5

C 1 1 3

C 1 0 6

V 7 0

1

I N I _ E N

D U A L

C 1 1 9

U 2 2 D

7 4 H C 0 4

9 8

1 47

V 9 0

1

S E G _ V 6

P D 2

C 1 2 0

R X _ I

1 6 K

P D 3

U 2 2 B 7 4 H C 0 4

3 4

1 47

U 2 0

S S T 3 9 V F 5 1 2

1 2 1 1 1 0 9 8 7 6 5 2 7 2 6 2 3 2 5 4 2 8 2 9 3 2

2 2 2 4 3 1

1 3 1 4 1 5 1 7 1 8 1 9 2 0 2 1

3 2 1 6

1 3 0

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 1 0 A 1 1 A 1 2 A 1 3 A 1 4 A 1 5 A 1 6

C E O E W E

D 0 D 1 D 2 D 3 D 4 D 5 D 6 D 7

V C C G N D

1 3 0

C 1 3 7

R 1 1 9

D V P 1 . 8

R X

D 6

M C K 2

P D 5

P D 4

P D 1

R 1 5 1

V 1 1 5

1

C 1 6 3

V 1 2 51V 1 2 9

1

P W M

D V P 5

S E G _ B

V 5 61V 5 9

1

V 8 2

1

U 3 9 ,1 4 P

D 0

I N I _ E N

S E G _ V 4

R 1 2 3

R 1 3 2

R 1 4 7

R 1 0 3

V P P

/ I D D _ R D

D 1 1

1 2

A D C _ C K

U C _ R E F

R 1 0 0

V 6 3

1

Q 1 2

R 1 1 5

+

C 1 5 1

R E C / Z O O M

T P H _ C K

4 K

/ K E Y D _ R D

P D 1

U 2 2 F

7 4 H C 0 4

1 31 2

1 4 7

U 3 9 A

7 4 H C 0 4

12

D O P 2 _ I

G A T E 2

D U A L

V 5 41V 4 5

1

U 1 2 B

7 4 H C 0 4

34

1 47

C 1 6 5

D 1 0

12

R 8 6

T P H _ D I

V O L _ D N 2 / V O L _ D N

1 6 K

L E D _ H 2 G

L E D _ R E C / Z O O M

P D 4

C 9 7

C 1 1 2

+

C 1 3 3

J 9

1 5 P

1 2 3 4 5 6 7 8

9 1 0 1 1 1 2 1 3 1 4 1 5

R 1 5 8

D V P 5

L E D _ H 1 G

P D 6

R 1 6 4

V 5 0

1

U C _ I D

R T C _ D S

S E G _ G

P D 4

R 1 6 9

R 1 1 0

C 7 5

R 1 3 0

V 1 1 1

1

V O L 1 _ 2

S E G E 0

U 2 2 C 7 4 H C 0 4

5 6

1 47

C 1 2 8

U 3 9 E

7 4 H C 0 4

1 11 0

C 1 6 1

D O P 2 _ H R

D V P 3 .3

D V P 5

/ K E Y D _ R D

P D 1

V 4 9

1

A D C _ X

S E G _ C

P D 3

P D 1

P D 6

P D 2

P D 1

U 1 2 D

7 4 H C 0 4

9 8

1 4 7

R 1 5 6

C 9 2

V 1 1 4

1

D V P 3 . 3

M C K 3

P D 0

V 5 2

1

U 3 2 C

7 4 H C 0 8

9

1 0

8

P D 6

C 9 9

V 1 2 71V 1 2 4

1

R 1 4 1

D V P 5

I N I _ E N

S E G _ V 2

8 K

I F _ S D I

R T C _ / C S

P D 2

C 1 5 2

D O P 2 _ P

U 3 2 , 1 4 P

V O L _ U P 1 /A L M

P D 1

C 1 6 8

R 9 0

C 1 2 5

U 1 8

D S 1 2 C 8 8 7

1 9 2 3

4 5 6 7 8

9 1 0 1 1

1 1 8

1 4

1 3

1 5 1 7

1 2

2 4

I R Q

S Q W

A D 0 A D 1 A D 2 A D 3 A D 4 A D 5 A D 6 A D 7

M O T R S T

A S

C S

R / W

D S

G N D

2 4

R 1 4 2

R 1 2 4

C 1 2 6

C 1 5 3 1 0 4

V 1 1 2

1

D V P 5

L E D _ I N F O

Q 8

D V P 3 . 3

R T C _ / C S

C 1 3 9

R 1 0 2

V 3 4

1

U 3 7 A

7 4 H C 0 8

1

2

3

( F E M A LE )

D V P 5

S E G E 6

C 8 4

V 1 3 1

1

R 1 0 4

U 1 8 , 2 4 P

P D 6

C 1 4 3

R 1 4 3

R 1 3 8

U 1 3

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

D V P 5

P D 3

P D 2

Q 7

R 1 2 5

V 1 0 3

1

V 3 2

1

T P H _ D I

1 M

P D 7

R 1 2 6

C 7 1

+

C 1 5 9

V 1 2 6

1

C 8 7

C 6 6

D V P 5

P D 5

P D 7

R 8 8

U 2 1

7 4 H C 2 4 5

2 3 4 5 6 7 8 9

1 9

1

1 8 1 7 1 6 1 5 1 4 1 3 1 2 1 1

2 0 1 0

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7

O E

D IR

B 0 B 1 B 2 B 3 B 4 B 5 B 6 B 7

V C C G N D

V 6 1

1

R 9 2

S E G E 5

C 1 6 0

R 1 0 6

D V P 5

P D 0

U 2 7

7 4 H C 5 7 4

1 1 0

1 1 2 0

1 9 1 8 1 7 1 6 1 5 1 4 1 3 1 2

2 3 4 5 6 7 8 9

O E G N D

C L K V C C

Q 1 Q 2 Q 3 Q 4 Q 5 Q 6 Q 7 Q 8

D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8

Q 9

J 1 6

5 2 6 7 - 2

1

2

D O P 2 _ Q

S E G _ D

P D 1

C 1 3 6

R 1 5 9

C 9 1

C V D D : 1 . 8 V D V D D : 3 . 3 V

T M S 3 2 0 V C 5 4 0 2

U 1 6

T M S 3 2 0 V C 5 4 0 2

3

1 4

3 4

4 0

5 0

5 7

7 6

7 0

9 3

1 0 6

1 1 1

1 2 843 3

5 6

7 5

1 1 2

1 3 0

1 6

5 2

6 8

9 1

1 2 5

1 4 2

8 8

8 6

8 5

8 9

8 7

8 3

8 4

9 9 1 0 0 1 0 1 1 0 2 1 0 3 1 0 4 1 1 3 1 1 4 1 1 5 1 1 6 1 1 7 1 1 8 1 1 9 1 2 1 1 2 2 1 2 3

1 3 1 1 3 2 1 3 3 1 3 4 1 3 6 1 3 7 1 3 8 1 3 9 1 4 0 1 4 1

5

7

8

1 0

1 1

1 0 7 1 0 8 1 0 9

5 8 6 9 8 1 9 5 1 2 0 1 2 4 1 3 5 6 3 9 4 6

5 4

5 3

6 0

5 9

4 9

4 8

4 4

4 3

4 7

4 5

4 2

4 1

5 1

8 2

9 6 9 7

7 9

7 8

7 7

9 4

6 1

6 4

6 5

6 6

6 7

6 3

3 2

3 1

2 7

3 0

2 8

2 6

2 9

9 8

2 1

2 0

2 2

2 4

1 9

2 3

2 5

9 2

5 5

1 8

1 3

1 2 9

1 2 7

1 7

6 2

1 0 5

9

V s s

D V D D

C V D D

T C K

T D I

T D O

T M S

T R S T

E M U 0

E M U 1 / O F F

D 0 D 1 D 2 D 3 D 4 D 5 D 6 D 7 D 8 D 9 D 1 0 D 1 1 D 1 2 D 1 3 D 1 4 D 1 5

A 0 A 1 A 2 A 3 A 4 A 5 A 6 A 7 A 8 A 9 A 1 0 A 1 1 A 1 2

A 1 4 A 1 5

A 1 7 A 1 8 A 1 9

H D 0 H D 1 H D 2 H D 3 H D 4 H D 5 H D 6

H D 7 H C N T L 0 H C N T L 1

B F S X 1

B F S X 0

B D X 1

B D X 0

B C L K X 1

B C L K X 0

B F S R 1

B F S R 0

B D R 1

B D R 0

B C L K R 1

B C L K R 0

H I N T / T O U T 1

T O U T 0

X 1

C L K I N / X 2

C L K M D 3

C L K M D 2

C L K M D 1

C L K O U T

I A C K

I N T 0

I N T 1

I N T 2

I N T 3

N M I

M P /M C

B I O

X F

H O L D

H O L D A

M S C

I A Q

R S

D S

P S

I S

M S T R B

R E A D Y

R /W

I O S T R B

H P I E N A

H R D Y

H R / W

H A S

H D S 2

H D S 1

H C S

H B I L

A 1 6

A 1 3

V 3 1

1

V 6 4

1

V O L 2 _ 0

D V P 5

I V P 1 6

R 9 3

R 1 3 3

U 2 6

M A X 2 3 2 C S E

1 1

1 0

1 2

9

1 4

7

1 3

8

213

456

1 6

1 5

T 1 I N

T 2 I N

R 1 O U T

R 2 O U T

T 1 O U T

T 2 O U T

R 1 I N

R 2 I N

V +

C 1 +

C 1 -

C 2 +

C 2 -

V -

V D D

G N D

V 1 0 6

1

R 1 0 8

V 1 0 7

1

S E G _ V 5

R S _ D S P

C 8 2

C 1 1 8

R 1 1 6

P D 2

V 1 1 8

1

C 9 8

R 1 1 1

P 1

D - S U B 9 P

5

9

4

8

3

7

2

6

1

N 2

N 1

V 1 0 0

1

R 1 2 8

+

C 1 4 4

P C B - 1 0 0 - M A I N - P 0 3 C

B T 3 0 0 D / S D I G IT A L C I R C U I T d e s ig n e d b y B I S T O S R & D D e p t.

D

2 2, 1 0 2 2 , 2 0 0 3수 요 일 월

T it l e

S i z e D o c u m e n t N u m b e r R e v

D a t e : S h e e t o f

R X

U 4 0 B

7 4 H C 0 8

4

5

6

V 1 0 2

1

R 1 6 2

D V P 5

/ L E D D _ W R

/ S E G V _ W R

S E G _ V 4

U 3 3 A 7 4 H C 3 9 3

123 4 5 6

1 4

7

A

C L R

Q A Q B Q C Q D

V C C

G N D

U 3 8 A 7 4 H C 3 9 3

123 4 5 6

1 4

7

A

C L R

Q A Q B Q C Q D

V C C

G N D

C 7 8

C 1 0 8C 1 0 7

C 1 4 9

R 1 0 5

D V P 5

M C K 1

V 1 1 0

1

C 1 5 7

U 3 9 D

7 4 H C 0 4

98

V 6 0

1

V 1 0 5

1

A D C _ C K

A D C _ X

P D 6

U 2 2 E

7 4 H C 0 4

1 11 0

1 4 7

R 1 2 2

V 4 7

1

C 7 7 C 8 1

R 9 4

D V P 3 . 3

D [ 0 . . 7 ]

R 1 6 0

R 1 4 5

R 1 0 1

C 1 1 4

L 3

U C

D V P 5

S E G E 1

S E G _ G

P D 5

C 1 7 1

R 1 2 0

R 1 2 9

C 1 4 8

V 7 1

1

V 3 6

1

V 6 9

1

D O P 1 _ I D

D 4

D O O R

M O T O R _ C K 3

V O L _ D N 1 / V O L _ U P

C 1 2 7

V 6 7

1

C 9 6

/ P R N C _ W R

R T C _ A S

V O L _ D N 2 / V O L _ D N

P D 0

V 5 3

1

R 8 7

C 8 6

+

C 1 5 6

D 2

S E G E 3

P D 4

P D 1

R 1 4 6

D V P 5

V O L _ D N 1 / V O L _ U P

/ S E G E _ W R

R 1 4 4

J 1 1

P I C D / L

1 2 3 4 5 6 7

D V P 5

C 1 1 1

Q 1 3

D V P 3 .3

S E G E 4

P D 2

U 3 6

L M 1 1 1 7 M P X- 1 . 8

312

4

I N

G N D / A D J

O U T 4

P D 6

U 3 4 B

7 4 H C 7 4

1 2

1 1

9 8

1 0

1 3

D

C L K

Q Q

P R E

C L R

D V P 5

1 6 K

V 9 9

1

V 1 2 0

1

C 8 5

L E D _ H 1 R

S E G _ F

R X _ Q

S E G _ D

R E C / Z O O M

S E G E 6

P D 3

R T C _ D S

R 1 4 0

I F _ S D I

L E D _ R E C / Z O O M

M O T O R _ C K 2

/ I D D _ R D

V O L _ U P 2

S E G E 2

/ V O L D _ W R

P D 1

C 1 5 8

C 7 9

V C C

V 8 3

1

D O P 1 _ H R

D V P 3 . 3

D 7

1 M

/ S E G D _ W R

V 9 8

1

C 1 0 0

D V P 5

S E G _ A

S E G _ B

S E G E 0

P D 3

V 5 7

1

R 1 5 4

U 3 9 C

7 4 H C 0 4

56

C 8 8

D V P 5

L E D _ H 2 G

P D [ 0 . . 7 ]

U 3 7 D

7 4 H C 0 8

1 2

1 3

1 1

R 1 3 1

C 1 2 3

V 4 2

1

D O P 1 _ I

R T C _ R / W

/ L E D D _ W R

P D 5

P D 7

V 9 1

1

R 1 5 5

J 1 7

5 2 6 7 -3

1 2 3

V 3 7

1

U 4 0 ,1 4 P

D 1

D 6

S E G _ F

P D 0

P D 7

V 9 2

1

U 4 1 D

7 4 H C 0 8

1 2

1 3

1 1

V 1 0 41V 9 3

1

S E G E 4

P D 3

U 2 8

T D 6 2 0 6 4 A F

3

6 1 1 1 4

2 7 9 1 6

8

1

1 8

1 7

B 1 B 2 B 3 B 4

C 1 C 2 C 3 C 4

K 2 & 3

K 1 & 4

G 2

G 1

U 4 3

P I C 1 6 C 7 7 /T Q F P

1 8

3 0

7 2 8

1 9 2 0 2 1 2 2 2 3 2 4

3 2 3 5 3 6 3 7 4 2 4 3 4 4 1

3 8 3 9 4 0 4 1 2 3 4 5

2 5 2 6 2 7

3 1

8 9 1 0 1 1 1 4 1 5 1 6 1 7

M C L R / V P P

O S C 1 / C L K

V D D V D D

R A 0 /A N 0 R A 1 /A N 1 R A 2 /A N 2 R A 3 /A N 3 / R E F R A 4 /T 0 C L K R A 5 /A N 4 / S S

R C 0 / T 1 O S O / T 1 C L K

R C 1 / T 1 O S I / C C P 2

R C 2 / C C P 1

R C 3 / S C K / S C L

R C 4 / S D I / S D A

R C 5 / S D O R C 6 / T X / C K R C 7 /R X / D T

R D 0 / P S P 0

R D 1 / P S P 1

R D 2 / P S P 2

R D 3 / P S P 3

R D 4 / P S P 4

R D 5 / P S P 5

R D 6 / P S P 6

R D 7 / P S P 7

R E 0 /R D / A N 5 R E 1 / W R / A N 6 R E 2 / C S / A N 7

O S C 2 / C L K O U T

R B 0 /I N T R B 1 R B 2 R B 3 R B 4 R B 5 R B 6 R B 7

R 1 1 7

 Technical Description

1 Doppler signal generation circuit

The burst signal drives the ultrasound sensor using by Q1 ~

15

BT-300 Service Manual V2.0

Q3. The L-C impedance matching circuit is used to match the received ultrasound signal and the signal is amplified about 40 dB at Q5. U2 demodulates by 1MHz to get the Doppler signal and the most adequate signals are abstracted through the 4 stages filter. BT-300 uses the 1MHz ultrasound, so the Doppler frequency is low frequency about 100 ~ 200Hz. The OP Amps (U6A, U6D) perform the frequency doubling by full-wave rectifier to hear clearly when user hears the fetal heart signal. After using the amplifier and LPF, this signal is adjusted the volume (U5, 8 steps) and transferred to audio amplifier (U8). The other rectifier circuit (U4A, U4D) is used to calculate the heart rate, this signal is amplified and used LPF for envelope detection. And adjust the DC level to fit in the input level of U25, A/D converter (0 ~ 3.3V).

2 Sound output circuit

The signal of Doppler (DOP1_S, DOP2_S), alarm and information are summed in U7A. The signal for alarm(bee bee bee) and information(ding~ dong~) is PWM signal generated from U43. This signal is converted to be able to hear using RC low pass filter. This signal and Doppler signal are integrated and output to speaker by audio amplifier (U8).

③ A/D converter & DSP circuit

MCP3204(U28) A/D converter is possible to convert to 4 channels and converts each signal DOP_1HR, DOP2_HR, UC to 12 bits digital signal by 200Hz periodically. The range of analog input signal of this A/D converter must be in 0 ~ +3.3V. The converted digital signal is transmitted to DSP(U16) by serial and calculated an useful value using many signal processing techniques. DSP is TMS320VC5402 by TI company and the fetal heart rate is calculated at 0.25 second using autocorrelation algorithm. The output is transmitted to CPU to display and record.

④ TX burst pulse generation circuit

U33, U34, U37~42 generate the burst signal for driving the ultrasound sensor and control signal for demodulation. The timing diagram is below.

< Timing Diagram >

16

3.47KHz

BT-300 Service Manual V2.0

⑤ CPU circuit CPU(U43) is PIC16F77, when it has malfunction, CPU resets

itself using MM1075(U17) watch-dog IC. FHR and UA are displayed on the 7-segment and signal quality is displayed on the LED.

Thermal print is operated +24V. CPU controls the stepping

motor and TPH to record the calculated data on the thermal paper. Door open or paper out is recognized by sensor. If that situation happens during recording, then CPU stops recording and displays “See Prn” on the display panel.

Time and date are calculated automatically at the

DS12C887(U18). CPU reads the value and records on the recording paper. Each key is recognized by CPU which performs each operation.

 Connection

A. Doppler Probe Connector

17

Tx

32 usec

128

usec 128 usec

Receive Time

DOP1_P

DOP1_I,Q

DOP2_P

DOP2_I,Q

BT-300 Service Manual V2.0

J 1

L M B 0 5 0 9 - 6 P

1 2 3 5 6

8N 1 N 2 N 3

S I G N A L

J 2

L M B 0 5 0 9 - 6 P

1 2 3 5 6

8N 1 N 2 N 3

S T I M U L A T O R

A V P 1 2

D O P 2 _ I D

A V P 1 2

D O P 1 _ I D

S I G N A L

Pin Name I/O Description

1 Stimulat

or

I Acoustic stimulator enable signal

2 GND - Ground 3 AVP12 O +12V power 5 GND - Ground 6 Signal I/O Transmitting and receiving ultrasound

signal

8 DOP_ID I Identity signal

B. UC Probe Connector

A V P 1 2

S I G N A L

U C _ I D

J 7

L M B 0 5 0 9 - 6 P

1 2 3 5 6

8N 1 N 2 N 3

Pin Name I/O Description

1 NC - 2 GND - Ground 3 AVP12 O +12V power 5 Signal I UC out signal 6 NC - 8 UC_ID I Identity signal

C. Mark Jack Connection

18

BT-300 Service Manual V2.0

J 6

5 2 6 7 - 2

1 2

S I G N A L

Pin Name I/O Description

1 Signal I Mark enable signal 2 GND - Ground

D. Doppler 2 control signal (only BT-300 dual)

D O P 2 _ I

D O P 2 _ H R

S I G N A L

J 5

A N A L _ S I G

246

8

135

7

V O L 2 _ 2

V O L 2 _ 1

D O P 2 _ Q

A V P 5

D O P 2 _ P

D O P 2 _ S

A V P 1 2

J 3

A N A L _ C O N

246

8

135

7

V O L 2 _ 0

J 4

T R A N S D U C E R

2 4 6 8

1 3 5 7

Name Description Signal Transmitting and receiving ultrasound signal DOP2_P Digital pulse for transmitting VOL2_0 Volume control signal 0 VOL2_1 Volume control signal 1 VOL2_2 Volume control signal 2 DOP2_Q 180° control signal for demodulation DOP2_I 0° control signal for demodulation DOP2_S Doppler sound signal DOP2_HR Doppler heart rate signal AVP5 +5V power AVP12 +12V power

E. Speaker Connector

19

BT-300 Service Manual V2.0

J 6

5 2 6 7 - 2

1 2

S I G N A L

Pin Name I/O Description

1 Signal O Sound output 2 GND - Ground

F. Input Power Connector

I V P 1 6

J 1 5

H T J - 0 2 0 - 0 4

1

23

J 1 6

5 2 6 7 - 2

1

2

Pin Name I/O Description

1 IVP I +16V input power 2 IVP16 I +16V input power through power switch

G. CPU Reset Connector

R E S E T

V P P

J 1 0

P I C D / L R S T

1 3

2 4

Pin Name I/O Description

1 VPP I Power for program writing to CPU 2 RESET O CPU reset signal 3 NC - 4 RESET O CPU reset signal

H. Dual / Single Recognized Connector

20

BT-300 Service Manual V2.0

D V P 5

J 1 8

D U A L / S I N G L E

1 2

S I G N A L

Pin Name I/O Description

1 DVP5 O +5V power 2 SIGNAL I Recognized signal

I. CPU Program Download Connector

V P P

/ I D D _ R D

/ K E Y D _ R D

J 1 1

P I C D / L

1 2 3 4 5 6 7

P D 7 P D 6

D V P 5

This connector is used only to download the CPU program.

J. Central Monitor Interface Connector (RS-232C)

( F E M A L E )

T X

R X

P 1

D - S U B 9 P

5

9

4

8

3

7

2

6

1

N 2

N 1

Pin Name I/O Description

2 RX I Receiving signal for central monitor 3 TX O Transmitting signal for central monitor 5 GND - Ground

K. Key Board Connector

21

BT-300 Service Manual V2.0

S E G E 6

J 1 3

H E A D E R 2 0 X 2

2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0

1 3 5 7

9 1 1 1 3 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 3 3 3 5 3 7 3 9

L E D _ I N F O

S E G _ V 5

S E G E 0

L E D _ H 1 R

L E D _ R E C / Z O O M

S E G _ C

L E D _ H 2 RL E D _ H 2 G

V O L _ U P 1 / A L M

R E C / Z O O M

L E D _ A L M / R E C

S E G E 1

L E D _ H 1 G

S E G _ B

S E G _ V 6

S E G _ V 3

V O L _ U P 2

L E D _ A L M

S E G _ V 7

V O L _ D N 1 / V O L _ U P

A L M / R E C

S E G _ E

S E G E 2

S E G _ A

S E G _ D

V O L _ D N 2 / V O L _ D N

S E G _ V 4

S E G E 5

S E G E 3

U C _ R E F

S E G _ V 1 S E G _ V 2

S E G _ F

S E G _ G

S E G E 7

S E G E 4

Pin Name I/O Description

1 LED_H1G O FHR1 green rhythm LED signal 2 LED_H1R O FHR1 red rhythm LED signal 3 LED_H2G O FHR2 green rhythm LED signal 4 LED_H2R O FHR2 red rhythm LED signal 5 LED_REC/ZOOM O Record(D) or zoom(S) LED signal 6 LED_ALM/REC O Alarm(D) or record(S) LED signal 7 LED_INFO O Information LED signal 8 LED_ALM O Alarm LED signal

9 SEG_V1 O Volume 1 step display signal 10 SEG_V2 O Volume 2 step display signal 11 SEG_V3 O Volume 3 step display signal 12 SEG_V4 O Volume 4 step display signal 13 SEG_V5 O Volume 5 step display signal 14 SEG_V6 O Volume 6 step display signal 15 SEG_V7 O Volume 7 step display signal 16 VOL_UP1/ALM I DOP1 volume up(D) or alarm(S) key 17 VOL_DN1/VOL_UP I DOP1 volume down(D) or volume

up(S) key 18 VOL_UP2 I DOP2 volume up key 19 VOL_DN2/VOL_D

N

I DOP2 volume down(D) or volume

down(S) key 20 REC/ZOOM I Record(D) or zoom(S) key 21 UC_REF I UC reference key 22 ALM/REC I Alarm(D) or record(S) key 23 SEG0 O 7-segment 0 enable signal 24 SEG1 O 7-segment 1 enable signal 25 SEG2 O 7-segment 2 enable signal

22

BT-300 Service Manual V2.0

26 SEG3 O 7-segment 3 enable signal 27 SEG4 O 7-segment 4 enable signal 28 SEG5 O 7-segment 5 enable signal 29 SEG6 O 7-segment 6 enable signal 30 SEG7 O 7-segment 7 enable signal 31 SEGA O 7-segment A display signal 32 SEGB O 7-segment B display signal 33 SEGC O 7-segment C display signal 34 SEGD O 7-segment D display signal 35 SEGE O 7-segment E display signal 36 SEGF O 7-segment F display signal 37 SEGG O 7-segment G display signal 38 GND - Ground 39 GND - Ground 40 GND - Ground

* D : dual, S : single

L. TPH Connector

S T R O B E 0

/ T P H _ L E

S T R O B E 1

D V P 5

T P H _ C K

P V P 2 4

T P H _ D I

J 9

1 5 P

1 2 3 4 5 6 7 8

9 1 0 1 1 1 2 1 3 1 4 1 5

Pin Name I/O Description

1 PVP24 O +24V power 2 PVP24 O +24V power 3 GND - Ground 4 GND - Ground 5 DVP5 O +5V power 6 NC - 7 STROBE

0

O TPH strobe 0 signal

8 STROBE

1

O TPH strobe 1 signal

23

BT-300 Service Manual V2.0

9 TPH_CK O TPH clock signal 10 /TPH_LE O TPH LE signal (active low) 11 TPH_DI O TPH data signal 12 GND - Ground 13 GND - Ground 14 PVP24 O +24V power 15 PVP24 O +24V power

M. Motor Connector

M C K 0

M C K 2

C 1 3 8

J 1 2

6 P

1 2 3 4 5 6

P V P 2 4

M C K 1

I V P 1 6

U 2 8

T D 6 2 0 6 4 A F

3

6 1 1 1 4

2 7 9 1 6

8

1

1 8

1 7

B 1 B 2 B 3 B 4

C 1 C 2 C 3 C 4

K 2 & 3

K 1 & 4

G 2

G 1

C 1 4 1

M C K 3

Pin Name I/O Description

1 MCK0 O Motor clock 0 signal 2 MCK1 O Motor clock 1 signal 3 MCK2 O Motor clock 2 signal 4 MCK3 O Motor clock 3 signal 5 PVP24 O +24V power 6 PVP24 O +24V power

N. Printer Door Check Connector

J 1 4

5 2 6 7 - 2

1 2

s i g n a l

Pin Name I/O Description

1 SIGNAL I Door open check signal 2 GND - Ground

O. Printer Paper Check Connector

24

BT-300 Service Manual V2.0

R 1 6 1

U 2 2 F

7 4 H C 0 4

1 31 2

1 4 7

U 2 2 E

7 4 H C 0 4

1 11 0

1 4 7

P A P E R

D V P 5

J 1 7

5 2 6 7 - 3

1 2 3

R 1 6 0

R 1 5 9

Pin Name I/O Description

1 LL O Level signal 2 DVP5 O +5V power 3 PAP I Paper check signal

2.2.3 Key Board

 Circuit Diagram

25

BT-300 Service Manual V2.0

S E G _ D

S E G _ G

S E G _ D

L E D _ I N F O

U C _ R E F

S E G _ E

S E G _ C

V O L _ U P 2

D 1

1

2

3

4

5

6

7

8 9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

D P

G

F

E

D

C

B

A 9

1 0

1 1

1 2

1 3

1 4

1 5

1 6

S E G _ B

S E G _ E

U 3

1 2 3 4 5 6 7 8 9 1 0

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 E 1 D 1 C 1 D P 2 E 2 D 2 G 2 C 2 D P 2 B

2 A

2 F

2 C O M

1 C O M

1 B

1 A

1 G

1 F

S E G _ F

S E G _ V 5

S W 3

1 2

J 1

H E A D E R 2 0 X 2

2 4 6 8 1 0 1 2 1 4 1 6 1 8 2 0 2 2 2 4 2 6 2 8 3 0 3 2 3 4 3 6 3 8 4 0

1 3 5 7

9 1 1 1 3 1 5 1 7 1 9 2 1 2 3 2 5 2 7 2 9 3 1 3 3 3 5 3 7 3 9

S E G _ AS E G _ C

S E G E 7

L E D _ A L M / R E C

L E D _ I N F O

S E G E 2

S E G _ A

S E G _ D

V O L _ D N 1 / V O L _ U P

R E C / Z O O M

S E G E 4

S E G E 3

L E D _ H 1 R

U C _ R E F

A L M / R E C

L E D _ A L M

S W 6

1 2

S E G _ B

S E G _ D

D 4

P C B - 1 0 0 - K E Y - P 0 2 . D S N C

B T 3 0 0 D / S K E Y C I R C U I T d e s i g n e d b y B i s t o s R & D D e p t .

A

1 1, 9 1 6 , 2 0 0 3화 요 일 월

T i t l e

S i z e D o c u m e n t N u m b e r R e v

D a t e : S h e e t o f

S E G _ A

L E D _ A L M / R E C

S E G _ E

S E G _ D

S E G _ V 4

S E G _ C

S E G _ B

S E G _ F

L E D _ H 2 R

V O L _ U P 2

S E G _ V 2

S E G E 1

S E G _ V 3

A L M / R E C

S E G _ V 2

D 2

S W 4

1 2

S E G _ E

S E G _ V 3

S E G E 4

L E D _ H 2 G

L E D _ R E C / Z O O M

S E G _ V 7

S E G _ C

L E D _ H 1 G

V O L _ U P 1 / A L M

D 7

S E G _ G

L E D _ H 1 R

S E G _ F

S E G E 6

D 5

S E G E 2

S E G _ V 5

S E G _ G

S E G E 3

S E G _ V 7

S W 1

1 2

S E G E 5

S E G _ V 1

S E G E 6

S E G _ V 6

S W 5

1 2

L E D _ R E C / Z O O M

S E G _ B

L E D _ H 2 G

S E G E 7

L E D _ A L M

D 6

U 2

8

7

9 1 0 1 1 1 2 1

2

3

4

5

D 3

B

D 2 F A D 1 E

D

D P

C

G

S E G E 1

S E G _ C

L E D _ H 2 R

S E G E 5

V O L _ D N 2 / V O L _ D N

U 1

8

7

9 1 0 1 1 1 2 1

2

3

4

5

D 3

B

D 2 F A D 1 E

D

D P

C

G

S E G _ A

R E C / Z O O M

S E G _ F

S E G _ V 6

S E G _ V 1

S E G _ A

S W 2

1 2

S E G E 0

S E G _ V 4

V O L _ D N 1 / V O L _ U P

S E G E 0

S E G _ G

S E G _ F

S W 7

1 2

S E G _ B

S E G _ G

V O L _ U P 1 / A L M V O L _ D N 2 / V O L _ D N

S E G _ E

D 3

L E D _ H 1 G

 Technical Description

FHR and UA are displayed on the 7-segment U1, U2, U3 and signal quality is displayed on the two colors LED D2, D4. D3, D5, D6, D7 LED display the state of alarm, recording, zoom and information operation respectively. SW1 ~ SW7 are key switches. D1 is displayed the volume step.

 Connection

This connection is same as the key board connection in main board.

2.3 Doppler Probe

26

BT-300 Service Manual V2.0

2.3.1 Composition

① Ultrasound Sensor ② Doppler Case ③ Probe Cable

2.4 UC Probe

2.4.1 Composition

27

①

②

③

①

BT-300 Service Manual V2.0

① UC Board ② UC Case ③ Probe Cable

2.4.2 Technical Description

 Circuit Diagram

28

②

③

BT-300 Service Manual V2.0

P C B - 1 0 0 - U C - P 0 2 . D S N C

B T 3 0 0 D / S U C P R O B E C I R C U I T b y B i s t o s R & D D e p t .

A

1 1, 9 1 6 , 2 0 0 3화 요 일 월

T i t l e

S i z e D o c u m e n t N u m b e r R e v

D a t e : S h e e t o f

U C V B 1

A V P 1

V 1 5

1

R 8

A V P 1 2

G N D 1

V 1 2

1

R 5

R 6

G 3

1

+

-

U 1 C

T L 0 6 4

1 0

9

8

4 1 1

V 1 6

1

U C _ R E F

V 1 4

1

R 3

U 2

7 8 L 0 5

1 3

2

O U T I N

G N D

U C _ R E F

U C M 1

G 2

1

U C _ R E F

V 6

1

V R 1

1 3

2

V 1

1

R 4

V 3

1

C 2

V 2

1

R 7

V 8

1

R 1 2

A V P 1 2

G 4

1

V R 2

1 3

2

A V P 1 2

U C _ O U T 1

V 7

1

C 1

U C P 1

+

-

U 1 B

T L 0 6 4

5

6

7

4 1 1

V 1 3

1

A V P 1 2

V 5

1

R 1 1

J P 1

123

G 1

1

V 1 7

1

V 91V 1 0

1

V 4

1

V 1 1

1

R 9

S G N D 1

R 1 0

+

-

U 1 A

T L 0 6 4

3

2

1

4 1 1

C 3

J P 2

1

2

3

4

R 1

 Technical Description

The uterine contraction is converted to electrical signal by using pressure sensor “strain gauge“. This signal is compensated the difference of production by adjusting the offset and gain. And it is transmitted to main board.

 Connection

Pin Name I/O Description

1 UC_OUT

1

O UC output

2 GND1 - Ground 3 AVP12 I +12V power 4 SGND1 - Shield ground

29

BT-300 Service Manual V2.0

Section 3. Troubleshooting

3.1Warning Sign Occasion and Status Checking

1 After the monitor power on, Information sound rings once.

2 If the ultrasound transducer pulls out of the connector during

monitoring(error #4), it rings once every 3 seconds until the

transducer is connected to the connector or pressing the

ALM(alarm) pushbutton causes the alarm function disable.

3 When the REC(record) pushbutton is pressed for recording in case

of print door open or under recording, when the door is opened, it

rings once every 3 seconds and “ERR 1” - “REC ERR 1” in BT-300D

-appears in the FHR and UC display as shown below until the door

is closed or pressing the ALM(alarm) pushbutton causes the alarm

function to be disabled and return to the normal monitoring mode.

[Figure 4.1 Front Panel for BT-300S]

[Figure 4.2 Front Panel for BT-300D]

4 When the REC(record) pushbutton is pressed for recording in case

of paper empty or printer door open, or when the paper runs out

under recording, it rings once every 3 seconds and “ERR 2” - “REC

ERR 2” in BT-300D - appears in the FHR and the UC display until

the paper is installed or pressing the ALM(alarm) pushbutton

causes the alarm function to be disabled and go back to the

normal monitoring mode.

30

BT-300 Service Manual V2.0

5 When the auto-printing period is expired, it rings once, right after

stop recording.

Error Number Cause Solution

1 Printer door open Close the door

2 Paper empty Insert the paper

3

Printer door open & Paper

empty

Close the door & Insert the

paper

4

Dop1 probe open under

normal operation

Connect the Dop1 probe

5

Dop2 probe open under

normal operation

Connect the Dop2 probe

[Table 4.1 Errors and Trouble shooting]

 Alarm Occasion and Status Checking Up

When the measured FHR is beyond the alarm setting range for more

than 20 seconds during monitoring, it rings every 3 second until the

FHR is within the alarm setting range at least once or pressing the

ALM(alarm) pushbutton causes the alarm function to be disabled on

purpose.

3.2Troubleshooting on the Other Situation

3.2.1 Power operation

 Not operate the power

31

BT-300 Service Manual V2.0

1 Check AC input  supply 110/220 V 2 Check +16V Power Adaptor output  replace Power

Adaptor

3 Check DC power in Main Board

 +16V (IVP16) : L2 point

+24V (PVP24) : U29 - D10 point +5V (DVP5) : U35 - 4pin +3.3V (DVP3.3) : U31 - 2pin +1.8V (DVP2.8) : U36 - 2pin +12V (AVP12) : U9 - 3pin +5V (AVP5) : U10 - 1pin

3.2.2 Doppler operation

 Not display the HR value

1 Check HR signal in Main Board  DOP1_HR signal : U4C-

8pin

2 Refer to display operation

 Not hear the Doppler sound

1 Check sound signal in Main Board

 DOP1_S signal : U6C-8pin

2 Check volume operation  U5 3 Refer to sound operation

3.2.3 UC operation

 Not display the UC value

1 Check UC signal in Main Board  U7C - 8pin 2 Refer to display operation

3.2.4 Sound operation

 Not hear the Alarm / Information sound

1 Check the PWM  U43 - 36pin 2 Check the Audio Amp  U8

3.2.5 Key operation

 Not operate the key

1 Check Main Board / Key Board cable  re-connection (J13) 2 Check the key input signal in Main Board  U21 - input

3.2.6 Display operation

32

BT-300 Service Manual V2.0

 Not operate the display

1 Check Main Board / Key Board cable  re-connection (J13) 2 Check the display output signal in Main Board

 U11, U13, U15, U19 - output

3.2.7 Print operation

 Not operate print

1 Check the cable Main Board / Print Engine

 re-connection (J9, J12, J14, J17)

2 Check the TPH control signal in Main Board

 U43 - 5pin, 22pin, 24pin, U27 – 14pin, 15pin

3 Check the motor control signal in Main Board

 U27 - 19in, 18pin, 17pin, 16pin

3.2.8 RS-232C operation

 Not operate serial communication

1 Check the serial in/out signal in Main Board  U26

Section 4. Maintenance and Cleaning

4.1Maintenance and Cleaning

You can keep BT-300 clean in many different ways. Use the

following recommendations to avoid the damage or stain of the

machine.

If you use the material that is not approved, it may cause damage

33

BT-300 Service Manual V2.0

to the product. In this case, the product will not be guaranteed even

within warranty period.

Caution

Check the main unit and the probes thoroughly after cleaning. Do not use the old and damaged equipment.

To keep the machine clean, apply alcohol on a soft cloth and scrub

the body and the probe once a month. Do not use lacquer, thinner,

ethylene, or the oxidizing substance.

Keep the probes from dust or stain. Wipe the cable with a soaked

cloth that is wet with warm water (40℃ / 104℉), and with the clinical

alcohol once a week.

Do not soak the machine or the probes into any liquid or detergent.

Keep the machine or the probes away from any liquid.

4.2Regular Inspection

Perform the periodical safety inspection on BT-300 once a year. For

the inspection details, see the service manual provided by BISTOS

Co., Ltd.

.

34

BT-300 Service Manual V2.0

Section 5. Specifications

 Ultrasound Mode

Technique: Pulsed Doppler Wave /

Autocorrelation Processing

Pulse Repetition Frequency: 3.5 KHz Pulse Duration: 128㎲ Center Frequency: 1MHz Intensity: <10mW/cm2 Heart Rate Counting Range: 50 ~ 240 BPM FHR Accuracy: ±2% of range

Leakage Current: <10㎂ Dual Fetus

 Uterine Activity Mode

Range, Tocotransducer: 0 ~ 99 Relative Units Excitation Voltage: +5.0Vdc Resolution: 1 Relative Unit Bandwidth, Tocotransducer: DC ~ 0.5Hz

 Power Requirements

Line Voltage: 100 ~ 250VAC Line Frequency: 50 or 60Hz Power Consumption: 80VA max

 Physical Characteristic

Height: 19.1cm (7.5 in) Width: 18.7cm(7.4 in) Depth: 20.1cm(7.9 in) Weight: 6Kg(13.2 lbs)

 Environmental Characteristics

Operating Temperature: 10℃(50℉) to 40℃(104℉) Operating Humidity: 30% ~ 85% non-condensing Storage Temperature: -10℃(14℉) to 60℃(131℉) Storage Humidity: 20% ~ 95% non-condensing Operating Atmospheric Pressure: 70 ㎪ ~ 106㎪ Storage Atmospheric Pressure: 70 ㎪ ~ 106㎪

35

BT-300 Service Manual V2.0

 Functional Features

FM UC

Dual Fetal Movement External Type

Reference (Zeroing) Control

Printer

Thermal Array Type Print Speed: 10, 20, 30 mm/min Paper Feeding Function Print Contrast: 1, 2, 3 steps Auto Print Period: 0(Off), 10, 20, 30, 40, 50, 60min

Display

7-Segment LED 2 Channels (HR, UC)-BT-300S/3 Channels (HR1, HR2, UC)-BT-300D

Indicators

Heart Rhythm (Green: Stable, Red: Unstable) Alarm On/Off State Print On/Off State AC Power (Green LED)

Sound

Doppler Sound with Volume Control (8 steps) Alarms Sound: exceed FHR Range Information Sound: Doppler Probe Off, Paper Off, Door Open, Watch Dog

Set-up Function

Alarm Upper/Lower Limit Value Event Mark Function Print Speed Zoom in Function Print Contrast Doppler2 Offset Function Auto Print Period

External Link

RS-232C: for Central Monitoring(Option)

36

BT-300 Service Manual V2.0

Service Telephone and Fax. Numbers

Telephone: 82-2-862–0642, 0643

Fax: 82-2-862–0644

BISTOS Co., Ltd

201, 2F, 239-15, Gasan-Dong

Geumcheon-Gu,

Seoul, Korea

Model Name: BT-300

www.bistos.co.kr

bistos@bistos.co.kr

EC Representative: Econet Medical Gmbh

High-t'Park Mainstr. 6c-6d D-45768 Marl/Germany

Telephone: +49 2365 92 437 - 0

Fax: +49 2365 92 437 – 55

37