Mindray M7 Series Diagnostic Ultrasound System Service Manual M7 Series Diagnostic Ultrasound System Service Manual Revision 15.0

M7 Series

Diagnostic Ultrasound

System

Service Manual

Revision 15.0

Revision History

Revision

Date

Reason for Change

5.0

2012.3.30

1. Increase “4.2 Field Replaceable Unit” list with pictures and important information.

2. Change “6 Maintenance Requirement” to “6 Function and Performance Checking Method”, increase detailed information of checking.

3. Change “7 Checking” to “6 Care and Maintenance”, increase detailed information of maintaining.

4. Change “8 System Maintenance” to “7 System Self-diagnosis”, move the content of cleaning to the chapter 8.

5. Increase “Electrical Safety Inspection” normative description and delete original content of electrical safety.

6. Increase CW installation method in 4.3.5.

7. Modify several clerical errors in the initial release.

6.0

2013.4.17

1. Add FRU part number for HDD of different regions/types (CE/FDA/human/vet) in 4.2

2. Add warning that human resume package is not compatible with vet machine, and vet resume package is not compatible with human machine.

7.0

2013.6.24

Add “The attentions to the assembly/disassembly, otherwise the hard disk will be damaged” to Chapter 4.3.14.

8.0

2015.2.15

Add SONY UP-D898MD, UP-X898MD printers in chapter 2.2 along with compatibility description.

9.0

2016.1.14

Change the order number of the display assembly in chapter 4.2

10.0

2016.11

Change the order number of the CPU and HDD assembly in chapter 4.2

11.0

2016.11

Change the order number of the CPU in chapter 4.2

12.0

2017.4

Add FRU part of M7 Premium in chapter 4.2 Update self-test screen and items in chapter 7

13.0

2017.12

Add HDD and SSD FDA FRU in chapter 4.2.

14.0

2019.3

Change the figure of the wireless card in chapter 4.2

15.0

2019.6

Update Control panel assembly and Silicon keypad in chapter 4.2

Mindray may revise this publication from time to time without written notice.

I

Intellectual Property Statement

SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray) owns the intellectual property rights to this Mindray product and this manual. This manual may refer to information protected by copyright or patents and does not convey any license under the patent rights or copyright of Mindray, or of others.

Mindray intends to maintain the contents of this manual as confidential information. Disclosure of the information in this manual in any manner whatsoever without the written permission of Mindray is strictly forbidden.

Release, amendment, reproduction, distribution, rental, adaptation, translation or any other derivative work of this manual in any manner whatsoever without the written permission of Mindray is strictly forbidden.

, , , , BeneView, WATO, BeneHeart, are the trademarks, registered or otherwise, of Mindray in China and other countries. All other trademarks that appear in this manual are used only for informational or editorial purposes. They are the property of their respective owners.

Responsibility on the Manufacturer Party

Contents of this manual are subject to change without prior notice.

All information contained in this manual is believed to be correct. Mindray shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this manual.

Mindray is responsible for the effects on safety, reliability and performance of this product, only if:

 all installation operations, expansions, changes, modifications and repairs of this product

are conducted by Mindray authorized personnel;

 the electrical installation of the relevant room complies with the applicable national and

local requirements; and

 the product is used in accordance with the instructions for use.

Note

This equipment must be operated by skilled/trained clinical professionals.

II

Warning

Manufacturer:

Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

Address:

Mindray Building, Keji 12th Road South, High-tech industrial park, Nanshan, Shenzhen 518057,P.R.China

Website:

www.mindray.com

E-mail Address:

service@mindray.com

Tel:

+86 755 81888998

Fax:

+86 755 26582680

It is important for the hospital or organization that employs this equipment to carry out a reasonable service/maintenance plan. Neglect of this may result in machine breakdown or personal injury.

Warranty

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

Exemptions

Mindray's obligation or liability under this warranty does not include any transportation or other charges or liability for direct, indirect or consequential damages or delay resulting from the improper use or application of the product or the use of parts or accessories not approved by Mindray or repairs by people other than Mindray authorized personnel.

This warranty shall not extend to:

 Malfunction or damage caused by improper use or man-made failure.

 Malfunction or damage caused by unstable or out-of-range power input.

 Malfunction or damage caused by force majeure such as fire and earthquake.

 Malfunction or damage caused by improper operation or repair by unqualified or

unauthorized service people.

 Malfunction of the instrument or part whose serial number is not legible enough.

 Others not caused by instrument or part itself.

Customer Service Department

III

Important Information

1. It is the customer’s responsibility to maintain and manage the system after delivery.

2. The warranty does not cover the following items, even during the warranty period:

(1) Damage or loss due to misuse or abuse.

(2) Damage or loss caused by Acts of God such as fires, earthquakes, floods, lightning, etc.

(3) Damage or loss caused by failure to meet the specified conditions for this system, such as

inadequate power supply, improper installation or environmental conditions.

(4) Damage or loss due to use of the system outside the region where the system was

originally sold.

(5) Damage or loss involving the system purchased from a source other than Mindray or its

authorized agents.

3. This system shall not be used by persons other than fully qualified and certified medical personnel.

4. DO NOT make changes or modifications to the software or hardware of this system.

5. In no event shall Mindray be liable for problems, damage, or loss caused by relocation, modification, or repair performed by personnel other than those designated by Mindray.

6. The purpose of this system is to provide physicians with data for clinical diagnosis. It is the

physician’s responsibility for diagnostic procedures. Mindray shall not be liable for the results of

diagnostic procedures.

7. Important data must be backed up on external memory media.

8. Mindray shall not be liable for loss of data stored in the memory of this system caused by operator error or accidents.

9. This manual contains warnings regarding foreseeable potential dangers, but you shall always be alert to dangers other than those indicated as well. Mindray shall not be liable for damage or loss that results from negligence or from ignoring the precautions and operating instructions described in this operator’s manual.

10. If the manager for this system is changed, be sure to hand over this operator’s manual to the new manager.

IV

Safety Precautions

Signal Word

Meaning

DANGER

Indicates an imminently hazardous situation that, if not avoided, will

result in death or serious injury.

WARNING

Indicates a potentially hazardous situation that, if not avoided, could

result in death or serious injury.

CAUTION

Indicates a potentially hazardous situation that, if not avoided, may

result in minor or moderate injury.

NOTE

Indicates a potentially hazardous situation that, if not avoided, may result in property damage.

Symbol

Description

Type-BF applied part.

The ultrasound probes connected to this system are type-BF applied parts.

The ECG leads applied on this system are type-BF applied parts, too.

“Attention” indicates the points that you should pay attention to. Be sure to read the operator’s manual concerning these points before using the system.

1. Meaning of Signal Words

In this manual, the signal words “ DANGER”, “ WARNING”, “ CAUTION”,

“NOTE” are used regarding safety and other important instructions. The signal words and their

meanings are defined as follows. Please understand their meanings clearly before reading this manual.

2. Meaning of Safety Symbols

V

3. Safety Precautions

DANGER:

Do not use flammable gasses, such as anesthetic gas, oxygen or

hydrogen, or flammable liquids such as ethanol, near this system,

because there is danger of explosion.

WARNING:

1. Do connect the power plug of this system and power plugs of the

peripherals to wall receptacles that meet the ratings indicated on

the rating nameplate. Using an adapter or multifunctional

receptacle may affect the system’s grounding performance, and

cause the leakage current to exceed safety requirements. You

must use the power cord provided with the system.

2. Use the cable provided with this system to connect the printer.

Other cables may result in electric shock.

3. Before cleaning the system, disconnect the power cord from the

outlet. System failure and electric shock may result.

4. DO NOT use a probe that has a damaged, scratched surface, or

exposed wiring of any kind. Immediately stop using the

transducer and contact Mindray Customer Service Department or

sales representative. There is risk of electric shock if using a

damaged or scratched transducer.

5. This system is not water-proof. Do not use this system in any

place where water leakage may occur. If any water is sprayed on

or into the system, electric shock may result. If water is

accidentally sprayed on or into the system, contact Mindray

Customer Service Department or sales representative.

6. Do not allow the patient to contact the live parts of the ultrasound

system or other devices, e.g. signal I / O ports. Electric shock

may occur.

7. Do not use an aftermarket transducer other than those specified

by Mindray. The transducers may damage the system causing a

profound failure, e.g. a fire in the worst case.

Please observe the following precautions to ensure patient’s and operator’s safety when using this

system.

VI

8. Do not subject the transducers to knocks or drops. Use of a

defective transducer may cause an electric shock.

9. Do not open the covers and front panel of the system. Otherwise,

short circuit or electric shock may result.

10. Do not use this system when any digital device such as a

high-frequency electrotome, high-frequency therapeutic device

or defibrillator is applied already. Otherwise, there is a risk of

electric shock to the patient.

11. When moving the system, you should first fold the LCD display,

disconnect the system from other devices (including

transducers) and disconnect the system from the power supply.

Separate the system from the mobile trolley before

transportation.

12. Prolonged and repeated use of keyboards may result in hand or

arm nerve disorders for some individuals. Observe the local

safety or health regulations concerning the use of keyboards.

13. Accessory equipments connected to the analog and digital ports

must comply with the relevant IEC standards (e.g., IEC 60950

information technology equipment safety standard and IEC

60601-1 medical equipment standard).Furthermore, all

configurations must comply with the standard IEC 60601-1-1.It is

the responsibility of the person, who connects additional

equipment to the signal input or output ports and configures a

medical system, to verify that the system complies with the

requirements of IEC 60601-1-1.If you have any questions

regarding these requirements, consult your sales representative.

CAUTION:

1. Precautions concerning clinical examination techniques:

This system must be used only by qualified medical professionals.

This operator’s manual does not describe clinical examination

techniques. The clinician should select the proper examination

techniques based on specialized training and clinical experience.

VII

2. Malfunctions due to radio wave:

If a radio wave emitting device is used in the proximity of this system,

it may interfere with operations. Do not bring or use devices that

generate radio waves, such as cellular telephones, transceivers, and

radio controlled toys, in the room where the system is installed.

If a person brings a device that generates radio waves near the

system, ask him / her to immediately turn OFF the device.

3. Precautions concerning movement of the system:

When you place the system on the mobile trolley and move them

together, you must secure all objects on the mobile trolley to prevent

them from falling. Otherwise you should separate the system from the

mobile trolley and move them individually.

When you have to move the system with the mobile trolley upward or

downward the stairs, you must separate them first and then move

them individually.

Object placed on the monitor may fall and injure an individual when

moving.

Fasten and fully secure any peripheral device before moving the

system. A loose peripheral device may fall and injure an individual.

4. If the circuit protector is tripped, it indicates that the system or a

peripheral device was improperly shut down and the system is

unstable. You cannot repair the system under this circumstance and

must call the Mindray Customer Service Department or sales

representative.

5. There is no risk of high-temperature burns during normal

ultrasound examinations. It is possible for the surface temperature

of the transducer to exceed the body temperature of a patient due to

environmental temperature and exam type combinations. Do not

apply the transducer to the same region on the patient for a long

time. Apply the transducer only for a period of time required for the

purpose of diagnosis.

6. Do not use the system to examine a fetus for a long period of time.

VIII

7. The system and its accessories are not disinfected or sterilized

prior to delivery. The operator is responsible for the cleaning and

disinfection of transducers and sterilization of biopsy brackets

according to the manuals, prior to the use. All items must be

thoroughly processed to completely remove harmful residual

chemicals, which will not only harmful to the human body, but also

damage the accessory.

8. It is necessary to press <End Exam> to end the current scan that is

in progress and clear the current Patient Information field.

Otherwise, new patient data may be combined with the previous

patient data.

9. Do not connect or disconnect the system’s power cord or its

accessories (e.g., a printer or a recorder) without turning OFF the

power first. This may damage the system and its accessories or

cause electric shock.

10. Read the Acoustic Output Principle in the operation manual

carefully before operate this system on clinical examination.

11. The cover contains natural rubber that can cause allergic reactions

in some individuals.

12. Please use the ultrasound gel compliant with the relevant local

regulations.

13. Do not connect this system to outlets with the same circuit breakers

and fuses that control the current of devices such as life-support

systems. If malfunctions or over-current appear on this system, or

when there is an instantaneous current at power ON, the breakers

and fuses of the building’s supply circuit may be tripped.

NOTE:

1. Do not use the system in the vicinity of strong electromagnetic field (such as a transformer), which may affect the performance of the system.

2. Do not use the system in the vicinity of high-frequency radiation source, which may affect the performance of the system or even lead to failure.

IX

3. To avoid damaging the system, DO NOT use it in following environment:

 Locations exposed to direct sunlight;

 Locations subject to sudden changes in environmental temperature;

 Dusty locations;

 Locations subject to vibration;

 Locations near heat generators;

 Locations with high humidity.

4. Turn ON the system only after the power has been turned OFF for more than 20 seconds. If the system is turned ON immediately after being turned OFF, the system may not be rebooted properly and could malfunction.

5. Press <Freeze> or turn off the power of the system before connecting or disconnecting a transducer. Otherwise, the system and / or transducer may be damaged.

6. Remove ultrasound gel from the face of a probe when the examination is complete. Water in the gel may enter the acoustic lens and adversely affect the performance and safety of the transducer.

7. You should properly back up the system to a secure external storage media, including system configuration and settings and patient data. Data stored to the

system’s hard drive may be lost due to system failure, improper operation or

accident.

8. Do not apply external force to the control panel. Otherwise, the system may be damaged.

9. If the system is used in a small room, the room temperature may rise. Please provide proper ventilation and free air exchange.

10. When using or placing the system, keep the system horizontal to avoid disbalance.

11. To dispose of the system or any part, contact Mindray Customer Service Department or sales representative. Mindray is not responsible for any system content or accessories that have been discarded improperly. Mindray is not responsible for any system content or accessories that have been discarded improperly.

12. Electrical and mechanical performance may be degraded due to long usage (such as current leakage or distortion and abrasion), the image sensitivity and precision may become worse too. To ensure optimal system operations, it is recommended that you maintain the system under a Mindray service agreement.

X

13. Do not use gel, disinfectant, transducers or needle-guided brackets that are not compatible with the system.

14. The replaceable fuse is inside the chassis. Refer replacing job to Mindray service engineers or engineers authorized by Mindray only.

15. Do not turn OFF the power supply of the system during printing, file storage or invoking other system operations. An interrupted process may not be completed, and can become lost or corrupted.

16. If the system is powered off improperly during operation, it may result in data damage of the system’s hard disk or system failure.

17. Do not use a USB memory device (e.g., an USB flash drive, removable hard disk) which has unsafe data. Otherwise, system damage may result.

18. It is recommended to only use the video devices specified in this manual.

19. When using this system with portable package, be careful not to block the ventilation slots.

20. DO NOT directly remove a USB memory device during file being copied; otherwise, the USB memory device and/or the system may be damaged.

21. Do not connect a removable hard disk of many partitions to the system.

22. Do not press any key on the control panel when perform DICOM file sending or file duplication from the USB memory devices.

4. Warning Labels

The warning labels are attached to this system in order to call your attention to potential hazards.

The symbol

same signal words as those used in the operator’s manual.

Refer to the operator’s manual for detailed information about the warning labels. Read operator’s

manual carefully before using the system.

on the warning labels indicates safety precautions. The warning labels use the

XI

5. Symbol Explanation

Symbol

Name

Function

Power off

Power button

│

Power on

Remote control port

I/O panel

Video print control

Video out

VGA out

Footswitch port

USB

ETHERNET

A

Transducer port A

Transducer port

B

Transducer port B

XII

1 System Overview

1.1 Intended Use

This product is applicable in ultrasound examining room, ward, emergency, anesthesia room and operating room, etc.

M7

Applicable for examinations to adults, pregnant women, pediatric patients and neonates, and it is intended for use in abdominal, cardiac, small parts (breast, testes, thyroid, etc.), peripheral vascular, fetal, transesophagel, transrectal, transvaginal, pediatric, neonatal cephalic, musculoskeletal (general and superficial), intraoperative, interventional, anesthesia (nerve), emergency, ICU/CCU, urology, sports health and transcranial exams.

M7Vet

M7Vet is a veterinary use color Doppler diagnostic ultrasound system, which is intended for use in clinical ultrasonic exams, such as abdominal, cardiac, small parts, peripheral vascular, transrectal, musculoskeletal (general and superficial), and intraoperative exams.

1.2 Contraindication

None.

1.3 Product and Model Code

M – □

Model code

Product code

1-1

2 System Structure

2.1 Introduction of Each Unit

Fig 2-1 External Appearance of the System (1)

Fig 2-2 External Appearance of the System (2)

2-1

Fig 2-3 External Appearance of the System (3)

No.

Name

Function

1

Display

Displays the images and parameters during scanning.

2

Control panel

Operator-system interface or control

3

Handle

Used for carrying the system

4

Transducer port

Connects a probe to the main unit; or connects a probe extend module

5

Transducer locking lever

Locks or unlocks the probe connected with the main unit

: Locked symbol

: Unlocked symbol

6

IO extend port

Connects the IO extend module

7

Power input port Connects the power adapter

8

USB port

Connects USB devices

9

Network port

Connects the network

10

S-Video separate video output

Connects with image signal output devices like the video recorder, video printer, text/graph workstation and so on.

System Structure

2-2

System Structure

Note:

Make sure VGA cable is not too long .

2.2 Peripherals Supported

 B/W video printer: MITSUBISHI: P93DC, SONY:UP-D897, UP-D898MD, UP-X898MD

 Color video printer: SONY: UP-D23MD

 DVD Recorder: MVR-11

 Graph/text printer

NOTE: printer UP-D898MD and UP-X898MD should be used in compatible with 1.00.7 2015-1-27 OS version or above versions. You can also select “DVR: 897” in the DIGITAL -> - DRIVER path on the printer (use UPD897 driver) if OS is not updated.

2.3 Extend Modules

There are four extend modules available for the system: probe extend module, IO extend module, V/A extend module, and ECG module. Interfaces of each extend module is described as follows:

2.3.1 Transducer Extend Module

The system can be configured with probe extend modules: PEM-21.

 PEM-21

Fig 2-4 PEM-21 Transducer Extend Module

PEM-21 transducer extend module can be used with the mobile trolley UMT-200 or UMT-300, for the figures, please refer to the service manual of trolley.

2-3

CAUTION:

You must turn off the ultrasound system before connecting or

disconnecting the probe extend module. Otherwise the system may be

damaged.

NOTE:

If you use the probe extend module to connect a probe, the image quality may be degraded.

No.

Symbol

Function

<1>、<2>

USB port

Connects USB devices.

<3>

ECG Port

Connects the ECG Module

<4>

Serial port

Connects serial port devices

<5>、<6> Audio output port

Used for audio signals of D mode sound from DVD output or audio comments

<7>

Mic In port

Reserved. (Connects a microphone used for receiving audio comments when a recorder is used to record images)

<8>

Remote control port

Connects the control port of the video printer

2.3.2 I/O Extend Module.

 Interfaces

System Structure

Fig 2-5 I/O Extend Module

2-4

System Structure

No.

Symbol

Function

<9>

Composite video output port

Connects with image signal output devices like the video recorder, video printer, text/graph workstation and so on.

<10>

DVI-I output port

Connects a display or projector, etc.

<>1

<>2

<>3

<>4

No.

Name

Function

<1>

Audio input port

Used for audio signal input

<2>

Audio input port

Used for audio signal input

I/O extend module

 Connection

Connect the I/O extend module to the main unit via the I/O extend port, thus the data port is extended. As shown in the following figure.

Fig 2-6 PEM-11 Connect the I/O Extend Module

2.3.3 V/A Extend Module

 About the Interfaces

The module is connected to the USB port of the main unit via a USB cable.

Fig 2-7 V/A Extend Module

2-5

System Structure

No.

Name

Function

<3>

Composite video input port

Used for composite signal video input

<4>

Separate video input port

Used for separate signal video input

Name

Function

ECG lead port

Used for ECG signal input

 Connection

Connect the V/A extend module to the main unit via an USB port, after that, you can see USB 2861 Device and USB Audio Device in the device manager. V/A extend module connection is shown in the following figure.

Fig 2-8 PEM-11 Connect the V/A Extend Module

2.3.4 ECG Module

 Interfaces

 ECG Lead

Fig 2-9 ECG Module

Two kinds of ECG leads are available for M7: AHA standard and IEC standard. For FDA region, only the ECG leads of AHA standard can be selected, and for other regions, both kinds can be used.

 Connection

To use the ECG module, you need to configure with the I/O extend module at the same time.

2-6

System Structure

<1> <2> <3> <4> <5> <6>

<7>

<8> <9> <10> <11> <12> <13> <14> <15> <16>

<17>

<18>

<19>

<20> <21> <22> <23>

<24>

<25>

<26>

<27>

<28>

<29>

<30>

<31>

<

3

2

>

<

3

>

<

3

4

>

<35>

<36>

<37>

<38>

<39>

<40>

<41>

<42>

<43>

<44>

<45>

<46>

<47>

<48>

<49>

<50>

<51>

<52>

First connect the I/O extend module, and then connect the ECG module to the I/O extend module, see the figure below:

Fig 2-10 Connect the ECG Module

2.4 Control Panel

Fig 2-11 Control Panel

2-7

System Structure

No.

Silk Print

Name

Function

<1>

/

Multifunctional key 1

Press to select the soft menu items displayed on the bottom of the screen. Refer to the subsequent contents for specific functions.

<2>

/

Multifunctional key 2

Press to select the soft menu items displayed on the bottom of the screen. Refer to the subsequent contents for specific functions.

<3>

/

Multifunctional key 3

Press to select the soft menu items displayed on the bottom of the screen. Refer to the subsequent contents for specific functions.

<4>

/

Multifunctional key 4

Up / down controls are used to turn pages up / down when there are more-than-one pages for the soft menu;

Left / right keys are used to switch between the different modes.

<5>

/

Multifunctional key 5

Press to select the soft menu items displayed on the bottom of the screen. Refer to the subsequent contents for specific functions.

<6>

/

Multifunctional key 6

Press to select the soft menu items displayed on the bottom of the screen. Refer to the subsequent contents for specific functions.

<7>

/

Power button

It does not illuminate when the system is turned off;

Press the button to turn on the system, the system enters the work status and the indicator lights on in green.

When the system enters the standby status, the indicator turns green.

<8>

Esc

Exit

Press to exit the current status to the previous status.

<9>

Help

Press to open or close the accompanying help documents.

<10>

Report

Press to open or close the diagnosis reports.

2-8

System Structure

No.

Silk Print

Name

Function

<11>

iStation

/

Press to enter or exit the patient information management system.

<12>

F1-F4

User-defined key

You can assign a function to the key.

<13>

Quad

Quad-split screen

Press to enter or exit the quad-split screen display.

<14>

Biopsy

Press to show or hide the biopsy guide line.

<15>

Setup

Press to show or hide the Setup menu.

<16>

Del / Press to delete the comment, etc.

<17>

TGC

/

Move to adjust time gain compensation.

<18>

/

Alphanumeric keys

Same as those of PC.

<19>

Menu

Main menu

Press to display or hide a mode-specific parameter menu.

<20>

Comment

ABC (Comments)

Press to enter or exit the character comment status.

<21>

Arrow

Press to enter or exit the arrow comment status.

<22>

Clear

Delete

Press to clear the comments or measurement calipers on the screen.

<23>

Up/down, left/right keys

Fn+/: to adjust volume or monitor brightness

<24>

iTouch

/

Rotate to increase or decrease the image gain; press to optimize the image, serving as a one-key optimization.

<25>

Patient

Patient Info

To enter into patient information input interface.

<26>

Exam

Exam Mode

Switch the exam mod and probe

<27>

Review

To review the stored images.

<28>

End Exam

Press to end an exam.

<29>

Body Mark

Body Marks (Pictograms)

Press to enter or exit the Body Mark status.

2-9

System Structure

No.

Silk Print

Name

Function

<30>

Cine

Cine Review

Press to enter or exit the Cine Review status.

<31>

Zoom

Press to enter or exit the Zoom status.

<32>

Cursor

Press to show the cursor.

<33>

F5

User-defined key

You can assign a function to the key.

<34>

Measure

Measurement

Press to enter or exit the application measurement mode.

<35>

Update

/

Switching key: Press to change the currently active window.

Press to start or end image capture in 3D/4D or iScape mode.

<36>

Set

Press to confirm an operation, same as the left-button of the mouse.

<37>

B / Press to enter the B mode

<38>

Dual

/

Press to enter the Dual mode from another mode;

Press to switch between the two display windows in the Dual mode.

<39>

Color

/

Press to enter the Color mode.

<40>

Power

/

Press to enter Power mode.

<41>

CW

/

Press to enter the CW mode.

<42>

M / Press to enter the M mode.

<43>

PW / Press to enter the PW mode.

<44>

F6

User-defined key

You can assign a function to the key.

<45>

Print

Press to print: user-defined key.

<46>

Save

Storage

Press to save; user-defined key.

<47>

Depth

Press to increase or decrease the imaging depth in scanning mode.

<48>

Freeze

Press to freeze or unfreeze the image.

<49>

/

Trackball

Roll the trackball to change the cursor position.

2-10

System Structure

No.

Silk Print

Name

Function

<50>

/

Multifunction knob

Rotate to adjust the menu items, parameters and direction of the comment arrow, etc.

Press to show the menu, and rotate the view the items.

<51>

/

Indicator 1

Indicates if the main unit is connected to the power supply.

If not connected, the indicator does not illuminate;

If connected, the indicator illuminates in green color.

<52>

/

Indicator 2

Indicates the current status of the batteries.

When the system is supplied with power by the batteries and the power capacity is lower than 30%, the indicator is yellow and flashes.

When the batteries are being charged, the indicator light is on and in yellow color.

When the battery capacity is charged to the full capacity, the indicator color turns green.

In other statuses, the indicator light is off.

Key

Function

Fn+

Increase the brightness of the LCD display. Fn+

Decrease the brightness of the LCD display. Fn+S

Press the two keys to mute the speaker.

Fn+

Press the two keys to increase display contrast. Fn+

Press the two keys to decrease display contrast.

Tip: “/” means the key / knob has no silk-printed name.

Keys which can work with the Fn key:

2-11

Adapter

port

USB #1

Network

port

SVIDEO

Out

I/O extension port Single probe port

Pencil

probe port

Main unit

I/O extension

module

Video

Out

USB #3

Audio

Out

Remote Mic In ECG

Serial

port

DVI-I

USB #2

USB#4

Probe extension

module

Power

adapter

AC IN

Pencil probe

Probe

A

Probe

Battery A Battery B

Probe

B

Probe

C

Power for

mobile

trolley

Mobile

trolley

Main board

Probe

Power

module

Adapter

Battery

IO

extension

4D

CW

Display

Control

panel

Probe

extension

Main

unit

Main

logic

3 Principle Description

3.1 Electric Principle of the System

The schematic diagram of M7 diagnostic ultrasound system is show in the following figure:

Fig 3-1 Schematic Diagram of System

According to functions of hardware, the block diagram of the hardware system is shown below:

Fig 3-2 Block Diagram of the Hardware System

Principle Description

Project

Output

Board of the Function

Unit

Notes

1

3V3STB

Main power board

Available when there is an adapter or dual batteries

2

5VSTB_CPU

Main power board

Controlled by 5Vstb_CPU_EN signal

3

+12V

Main power board

Controlled by POWER_ON# signal

4

+95V

Main power board

Controlled by POWER_ON# signal

5

-95V

Main power board

Controlled by POWER_ON# signal

6

PHV1P

Main power board

Controlled by POWER_ON# signal

7

PHV1N

Main power board

Controlled by POWER_ON# signal

8

PHV2P

Main power board

Controlled by POWER_ON# signal

9

PHV2N

Main power board

Controlled by POWER_ON# signal

10

+5V

Auxiliary power board

Controlled by POWER_ON# signal

The main board unit is the core of the whole system, including the transducer port, transmitting, receiving, beam forming, signal processing, system monitor and management, audio, video, interfaces and so on, and these will be introduced later. Main logic unit completes the main logic processing functions, including transmitting control logic, beam former logic, signal processing logic. The functions of the other modules can be explained by their names, and will not be explained here.

Besides, M7 also supports ECG module, probe extend module and video capture module. Principle of Boards

3.1.1 Power System

3.1.1.1 Basic Functions of Power System

As the power supply of the system, the power system consists of adapter, batteries, main power board, auxiliary power board, flexible boards for connecting batteries and flexible boards of analog power, etc. The power is supplied through two methods, external power adapter or batteries. The system is first powered by the adapter, and the batteries are provided for back-up. The main power board and auxiliary power board are mainly responsible for supplying the system with the DC output listed in the following table, charging management of the batteries, monitoring the power, and communicating with the main board.

Table 3-1 DC Output of Power Supply System

3-2

Principle Description

11

+3.6V

Auxiliary power board

Controlled by POWER_ON# signal

12

+3.3V

Auxiliary power board

Controlled by POWER_ON# signal

13

+2.8V

Auxiliary power board

Controlled by POWER_ON# signal

14

+1.8V

Main power board

Controlled by POWER_ON# signal

15

+1.5V

Auxiliary power board

Controlled by POWER_ON# signal

16

-5V

Auxiliary power board

Controlled by POWER_ON# signal

17

-12V

Auxiliary power board

Controlled by POWER_ON# signal

VBUS+

BUCK

BOOST

+12V

Flyback

±95V

BUCK

+5V

BUCK

3.6V/3.3V/2.8V

LDO

+3.3VSTB

BUCK

+5VSTB_CPU

BUCK-

BOOST

PHV1N_PW

PHV2P

LDO

PHV2N

-5V/-12V

Charger

DC/DC

1.8V/1.5V

Battery_A Battery_B

PHV1P_PW

Battery_A

Battery_B

Adapter

BOOST

DC/DC

DC/DC LDO

PHV1P_C

W

PHV1N_CW

3.1.1.2 Basic Principle of Power System

The principle diagram of the power system is shown in figure below. The power is supplied through two methods, external power adapter or batteries. The adapter is connected to the power board via the system main board when the system is powered by adapter. The batteries are connected to the power board via the flexible boards when the system is powered by batteries. The main power board generates 4 PHV outputs: 3V3STB, 5VSTB_CPU, +12V and ±95V, monitors and manages the power output. The auxiliary power board generates +5V, -5V, -12V, +3.6V, +3.3V, +2.8V, +1.8V and +1.5V outputs, and manages the charging of the batteries. The main power board and the auxiliary power board are connected via two 26 PIN connectors.

The system main board and the digital ports of the power board are connected together via a 64 PIN connector, and the digital power ports and signals are defined in table below; the system main

Fig 3-3 Schematic Diagram of Power System

3-3

Principle Description

No.

Signal name

No.

Signal name

1

EDC_PWR

2

EDC_PWR

3

EDC_PWR

4

EDC_PWR

5

EDC_PWR

6

EDC_PWR

7

GND

8

GND

9

GND

10

GND

11

GND

12

GND

13

N12V

14

STS_EDC#

15

GND

16

GND

17

POWER_ON#

18

CPU12V_OK#

19

T_D+

20

T_D-

21

GND

22

GND

23

GND

24

GND

25

D12V

26

D12V

27

D12V

28

D12V

29

GND

30

GND

31

D5V1

32

D5V1

33

GND

34

GND

35

5VSTB_OK#

36

5VSTB_EN#

37

GND

38

GND

39

5VSTB_CPU

40

3V3STB

board and the auxiliary power board are connected together via an analog flexible board, and the analog power ports and signals are defined in Table 3-3; the main power board and the batteries are connected together via the battery flexible board, and the signals are defined in Table 3-4; the main power board and the auxiliary power board are connected together via two 26 PIN connectors, and the signals are defined in Table 3-5 and Table 3-6.

Table 3-2 Signal definition of connectors between main power board and system main board

digital power

3-4

Principle Description

No.

Signal name

No.

Signal name

41

GND

42

GND

43

D3V3

44

D3V3

45

GND

46

GND

47

D2V8

48

D1V5

49

GND

50

GND

51

D1V8

52

D1V8

53

GND

54

GND

55

PWR_RX

56

PWR_CONF_N

57

PWR_TX

58

PWR_RST

59

GND

60

GND

61

BATA_PRT#

62

BATB_PRT#

63

BATSTS_O

64

BATSTS_G

Signal definition

EDC_PWR: adapter power input;

GND: ground;

N12V: analog -12V output;

STS_EDC#: adapter normal working signal, low level means the output of adapter is normal;

POWER_ON#: power on signal from the system main board, low level effective;

CPU12V_OK#: +12V output signal, lower level means normal output;

T_D+, T_D-: power board temperature detecting signal;

D12V: digital power +12V output;

D5V1: digital power +5V output;

5VSTB_OK#: 5VSTB output signal, lower level means normal output;

5VSTB_EN#: 5VSTB enable signal from the system main board, low level effective;

5VSTB_CPU: standby power 5VSTB_CPU output, the voltage is +5V;

3V3STB: standby power 3V3STB output, the voltage is +3.3V;

D3V3: digital power +3.3V output;

D2V8: digital power +2.8V output;

D1V5: digital power +1.5V output;

3-5

Principle Description

No.

Signal name

No.

Signal name

1

N95V

2

GND

3

95V

4

GND

5

PHV2N

6

GND

7

PHV1N

8

GND

9

PHV2P

10

GND

11

PHV1P

12

GND

13

A12V

14

GND

15

A2V8

16

GND

17

GND

18

GND

19

A3V6

20

A3V6

21

GND

22

GND

23

A1V5

24

A1V5

25

A1V5

26

A1V5

27

GND

28

GND

29

NA12V

30

GND

31

NA5V1

32

GND

D1V8: digital power +1.8V output;

PWR_RX: serial port communication receiving port of the the power and system mother board;

PWR_TX: serial port communication transmitting port of the power and system mother board;

PWR_CONF_N: power board chip configuration signal from the system main board;

PWR_CONF_N: power board chip reset signal from the system main board;

BATA _ PRT#: battery A presenting signal, low level means the battery is presenting;

BATA _ PRT#: battery B presenting signal, low level means the battery is presenting;

BATSTS_O: battery status indicating light, orange;

BATSTS_G: battery status indicating light, green.

Table 3-3 Signal and analog power definition between auxiliary power board and system main

board

3-6

Principle Description

33

GND

34

GND

35

A5V1

36

A5V1

37

A5V1

38

A5V1

39

GND

40

GND

No.

Signal name

No.

Signal name

1

BATB+

2

BATB+

3

BATB+

4

BATB+

5

BATB_PRT#

6

GND

7

NTC_BATB

8

GND

9

BATB_FB

10

GND

11

BATB_SCL

12

GND

13

BATB_SDA

14

GND

15

BATA_PRT#

16

GND

Signal definition

N95V: -95V fixed high voltage output;

GND: ground;

95V: +95V fixed high voltage output;

PHV2N: PHV2 negative voltage output, -5~-85V;

PHV1N: PHV1 negative voltage output, PW outputs -13~-85V, CW outputs -2~-5V;

PHV2P: PHV2 positive voltage output, 5~85V;

PHV1P: PHV1 positive voltage output, PW outputs 13~85V, CW outputs 2~5V;

A12V: analog +12V output;

A2V8: analog 2.8V output;

A3V6: analog 3.6V output;

A1V5: analog 1.5V output;

NA12V: analog -12V output;

NA5V: analog -5V output;

A5V1: analog +5V output.

Table 3-4 Signal definition between the battery and main power board

3-7

No.

Signal name

No.

Signal name

17

NTC_BATA

18

GND

19

BATA_FB

20

GND

21

BATA_SCL

22

GND

23

BATA_SDA

24

GND

25

GND

26

GND

27

BATA+

28

BATA+

29

BATA+

30

BATA+

Signal definition

No.

Signal name

No.

Signal name

1

VBUS+

2

VBUS+

3

VBUS+

4

GND

5

GND

6

GND

7

5V_CW

8

D5V1

9

START

10

D2V8

BATB+: battery B input;

GND: ground;

Principle Description

BATB_PRT#: battery B presenting signal, low level is effective;

NTC_BATB: battery B temperature signal;

BATB_FB: battery B far end sampling signal;

BATA_SCL: battery B SMBUS communication clock signal;

BATA_SDA: battery B SMBUS communication data signal;

BATA_PRT#: battery A presenting signal, low level is effective;

NTC_BATA: battery A temperature signal;

BATA_FB: battery B far end sampling signal;

BATA_SCL: battery A SMBUS communication clock signal;

BATA_SDA: battery A SMBUS communication data signal;

BATA+: battery A input;

Table 3-5 Signal definition between main power board and auxiliary power board

3-8

No.

Signal name

No.

Signal name

11

GND

12

GND

13

N5V_CW

14

A12V

15

GND

16

N12V

17

PHV2P

18

D1V5

19

PHV1P

20

GND

21

PHV2N

22

GND

23

PHV1N

24

GND

25

95V

26

N95V

Signal definition

No.

Signal name

No.

Signal name

1

EDC_POWER

2

EDC_POWER

VBUS+: input bus voltage on the power board;

Principle Description

GND: ground;

5V_CW: LDO input of PHV1P CW voltage;

D5V1: digital power +5V output;

START: auxiliary power board power on signal from the system main board, low level effective;

D2V8: digital power +2.8V output;

5V_CW: LDO input of PHV1N CW voltage;

A12V: analog +12V output;

N12V: digital power -12V output;

PHV2P: PHV2 positive voltage output, 5~85V；

D1V5: digital power +1.5V output;

PHV1P: PHV1 positive voltage output, PW output 13~85V, CW output 2~5V;

PHV2N: PHV2 negative voltage output, -5~85V；

PHV1N: PHV1 negative voltage output, PW output -13~85V, CW output -2~5V;

95V: +95V fixed high voltage output;

N95V: -95V fixed high voltage output.

Table 3-6 Signal definition between main power board and auxiliary power board (2)

3-9

Principle Description

No.

Signal name

No.

Signal name

3

ISENSE

4

EDC_POWER

5

GND

6

GND

7

CHARGE_EN

8

GND

9

BATA+

10

BATA+

11

BATA_FB

12

NTC_BATA

13

GND

14

GND

15

BATB_FB

16

NTC_BATB

17

BATB+

18

BATB+

19

GND

20

GND

21

D1V8

22

D1V8

23

GND

24

GND

25

D3V3

26

D3V3

Signal definition

EDC_PWR: adapter power input;

ISENSE: main system load current signal from the power main board to the auxiliary power board;

GND: ground;

CHARGE_EN: battery charge enable signal, low level effective;

BATA+: battery A input;

BATA_FB: battery A far end sampling signal;

NTC_BATA: battery A temperature signal;

BATB_FB: battery B far end sampling signal;

NTC_BATB: battery B temperature signal;

BATB+: battery B input;

D1V8: digital power +1.8V output;

D3V3: digital power +3.3V output.

3-10

Principle Description

3.1.1.3 3V3STB Circuit Unit

Basic Principle of 3V3STB Circuit

The 3V3STB takes EDC_POWER from the adapter or the BATTERY_BUS from the batteries as the input and generates 3V3STB via linear voltage-stabilizing chip TPS715A01.

TPS715A01 is equipped with current-limiting function itself.

The Maintenance Points of 3V3STB Circuit

If the 3V3STB unit is faulty, first check whether the input voltage of U12 PIN1 is normal; if it is normal, it indicates that the U12 is damaged or the fault is caused by the over-current or short circuit of the load.

3.1.1.4 5VSTB_CPU Circuit Unit

Basic Principle of 5VSTB_CPU Circuit

The 5VSTB_CPU takes the BATTERY_BUS from the batteries as input and generates the output via the synchronous rectifying step-down chip TPS62110 through BUCK transformation.

The TPS62110 chip itself is equipped with MOSFET, current-limiting function and over-temperature protection.

The Maintenance Points of 5VSTB_CPU Circuit

If the 5VSTB_CPU unit is faulty, first check whether the input voltage of U35 PIN2 is normal and whether the enabling signal of PIN4 is 3.3V; if they are all normal, it indicates that the U35 is damaged or the fault is caused by the over-current or short circuit of the load; if PIN4 is low level, check whether the system main board provides 5VSTB_EN# signal and whether the feedback connection or overvoltage circuit is normal.

3.1.1.5 +12V Circuit Unit

Basic Principle of +12V

Voltage rise-and-fall IC LTC3780 of LINEAR Company is applied in +12V circuit unit, and whether the input voltage is higher or lower than 12V, the output voltage will be kept at 12V.

The +12V over-current and overvoltage protection is not locked, and the over-current is over 8A. The output voltage returns to normal after over-current disappears.

3-11

Principle Description

The Maintenance Points of +12V

Before testing, ensure that the POWER_ON# signal is of low level and the input voltage VBUS+ is normal.

The work flow of maintenance is shown as follows:

Test the voltage of PIN8 of U14, which should be higher than 3V;

Test the voltage of PIN19 of U14, which should be higher than 6V;

Use an oscilloscope to measure G poles of Q6, Q7, Q8 and Q9 to check whether there is driving pulse; at least two MOSFETs’ G poles should have drive pulse;

Check if there is any damage to the four MOSFETs Q6, Q7, Q8 and Q9 and diode D5 and D7;

If +12V hiccups, check whether the output is overloaded, and check the feedback and overvoltage protection circuits.

3.1.1.6 PHV Circuit Unit

Basic Principle of PHV

The PHV circuit consists of PHV1P, PHV1N, HV2P and PHV2N, of which, the PHV1P and PHV1N consist of PW and CW output. The PW output range of PHV1 is ±13V~±85V, and the CW output range is ±2V~±4V. Only PW output of PHV2 is available, and the output range is ±5V~±85V.

The input of the PW circuit of the 4 PHVs is controlled +12V, which is under the control of PMOS Q5.The PW output voltage of PHV1P and PHV2P is generated by BOOST circuit. The controlling IC is TL594, which is frequently adopted by our company. The range of output voltage of PHV2P is +5V~+85V, so when the output voltage is over than 15V, the input is +12V; and when the output voltage is lower than 15V, the input is +5V. Both the two inputs are under the control of output voltage controlling signal. The PW output voltage of PHV1N and PHV2N is generated by BUCK-BOOST circuit. The controlling IC is MAX1847, which is frequently adopted by our company.

The CW output of PHV1P and PHV1N is generated through linear voltage-stabilizing. The input of CW circuit of PHV1P is +5V and the chip LT1963 LDO is adopted for the linear voltage-stabilizing; the input of CW circuit of PHV1N is -5V, and the chip LT1185 LDO is adopted for the linear voltage-stabilizing. The voltage of CW output is regulated by the output voltage controlling signal. When the controlling signal is 0.45~2.25V, the corresponding output voltage is ±2V~±4V.

The 4 PHV are all equipped with overvoltage protection, and the overvoltage protection of each circuit is independent. The overvoltage will not be locked, and the voltage is about 93V when overvoltage occurs.

The 4 PHV are all equipped with over-current protection. In PW mode, once over-current occurs, all the 4 PHV PW outputs and ±95V will be switched off, while the CW output is not influenced. The

3-12

Principle Description

over current protection in CW mode is implemented by current-limiting of LDO chip itself. Only the output is cut off and other outputs are not influenced.

The Maintenance Points of PHVP PW Circuit Unit

Make sure the +12V output is normal, and PHV_CW is low level before testing.

Test the grid electrode of Q5, and the voltage should be around 3V and VCC2 is 12V.

The work flow of troubleshooting for U17 and U18 and their peripheral circuits are shown as follows:

Test the voltage of PIN8 and PIN11, which should be 12V;

Test the voltage of PIN14, which should be +5V;

Test PIN5, and there should be oscillation wave form, the frequency of which is around 100kHz;

Test the voltage of PIN15, which should be around 5V;

Test PIN9 and PIN10, and there should be driving pulses.

If the test shows the grid electrode of Q5 is 12V, check the +5V output and whether over-current or short circuit occurs.

The Maintenance Points of PHVN PW Circuit Unit

Make sure the +12V output is normal, and PHV_CW is low level before testing.

Test the grid electrode of Q5, and the voltage should be around 3V and VCC2 is 12V.

The work flow of troubleshooting for U24 and U25 and their peripheral circuits are shown as follows:

Test the voltage of PIN15, which should be 12V;

Test the voltage of PIN5, which should be +1.25V;

Test the voltage of PIN2, which should be around 4.25V;

Test PIN14, and there should be driving pulses.

If the test shows the grid electrode of Q5 is 12V, check the +5V output and whether over-current or short circuit occurs.

The Maintenance Points of PHV CW Circuit Unit

Make sure the +5V and -5V outputs are normal, and PHV_CW is high level before testing;

The work flow of troubleshooting for U13 and its peripheral circuit is shown as follows:

Test the voltage of PIN12, which should be +5V;

Test the voltage of PIN6, which should be +1.21V;

If the output voltage is not consistent with the controlling signal, check R66, R203, R260, R150 and U2 related circuits.

3-13

Principle Description

The work flow of troubleshooting for U31 and its peripheral circuits are shown as follows:

Test the voltage of PIN3, which should be -5V;

Test the voltage of PIN2, which should be -2.37V;

If the output voltage is not consistent with the controlling signal, check R67, R204, R198 and U3 related circuits.

3.1.1.7 +5V Circuit Unit

Basic Principle of +5V Circuit

The input of +5V circuit is VBUS+, and stable +5V output is generated through BUCK transformation step-down. The controlling IC is LM5642 from NS, which is a biphase step-down synchronously rectifying controlling IC.

+5V circuit is equipped with overvoltage and over-current protection and is locked during protection.

The Maintenance Points of +5V Circuit

Check by sight whether LM5642 and its peripheral devices are well welded before power on, and check whether the MOSFETs Q16~Q19 and diodes D3 and D6 are broken down using a multimeter.

Before testing, make sure that the STRAT signal is free or of low level, and the input voltage VBUS+ is normal.

The work flow of maintenance after power on is shown as follows:

Test the voltage of PIN22, which should be VBUS+;

Test the voltage of PIN7, PIN19 and PIN25, which should be around +5V;

Test PIN9 and PIN10, which should be over than 1V;

Test PIN17, PIN20, PIN23 and PIN26, and there should be driving pulses at the frequency of around 200kHz;

If there is no output with the circuit, check whether the output is over-current and check the feedback circuit.

3.1.1.8 +1.5V Circuit Unit

Basic Principle of +1.5V Circuit

+1.5V output adopts the synchronously rectifying step-down chip EL7566, which is frequently adopted by our company. This chip is integrated with over-current and over-temperature protection internally. The over-current protection protects from hiccup.

3-14

Principle Description

The Maintenance Points of +1.5V Circuit Unit

Check by sight whether EL7566 and its peripheral devices are well welded before power on. The work flow after power on is:

Test the voltage of PIN19~PIN21, which should be +5V;

Test the voltage of PIN22, which should be +5V;

Test PIN27, which should have oscillatory wave output;

Te st PIN8~PIN13, which should have pulse voltage waveform;

If there is no output with the circuit or the if circuit is hiccupping, check if the output is over-current and check the feedback circuit.

3.1.1.9 +3.6V/3.3V/2.8V/1.8V Circuit Unit

Basic Principle of +3.6V/3.3V/2.8V/1.8V Circuit

The output adopts the synchronously rectifying step-down chip LM2854 of NS Corporation. This chip is integrated with MOSFET and over-current protection internally. The over-current protection protects from hiccup.

The Maintenance Points of +3.6V/3.3V/2.8V/1.8V Circuit Unit

Check by sight whether LM2854 and its peripheral devices are well welded before power on. The work flow after power on is:

Test the voltage of PIN5~PIN7 and PIN10~11, which should be +5V;

Test PIN12~PIN13, which should have pulse voltage waveform;

If there is no output with the circuit or if the circuit is hiccupping, check if the output is over-current and check the feedback circuit.

3.1.1.10 -5V and -12V Circuit Unit

Basic Principle of -5V and -12V

The implementations of -5V and -12V are the same. The negative voltage IC MAX1847 is adopted for both circuits. The -5V and -12V are both equipped with overvoltage and over-current protection circuits, so once either overvoltage or over-current occurs, both circuits will be cut off and locked.

The Maintenance Points of -5V and -12V Circuits

Make sure that VBUS+ for -5V and -12V is within the normal range.

After power on, refer to the work flow shown as follows:

3-15

Principle Description

Test the voltage of PIN15 of the power supply chip U15~16, which should be the same as VBUS+;

Test the voltage of PIN5 (the reference voltage pin), which should be 1.25V;

Test PIN8, the overvoltage and over-current protection controlling pin, which should be higher than 2V;

Test PIN14 (drive pin), which should output drive pulse.

If there is no output with the circuit, check if the output is over-current and check the feedback circuit.

3.1.1.11 Charging Unit

Basic Principle of Charging Unit

The rise-and-fall charging chip MAX1870A made by MAXIM is adopted for both charging units A and B.

The MAX1870A enabling is controlled by the system’s main board and batteries’ temperature, and

eventually controlled by level of PIN15. When PIN15 is high level (about 5V), the charging is enabled; when PIN15 is low level, the charging is disenabled. The charging current is affected by the status of the batteries and the load current of the main unit. The charging circuit regulates the charging current dynamically according to the load current of the main unit to ensure fast charging and the load current of the adapter is not overloaded when the system is on.

The Maintenance Points of Charging Unit

Before testing, ensure that the charging chip is enabled, that is, PIN15 is high level.

The maintenance work flow of charging IC U7 and U8 and their peripheral circuits.

Check by sight if the soldering position departs from normal position, if so, it will cause short circuit of pins.

Test power supplying voltage PIN32, which should be equal to adapter’s output voltage of

EDC_POWER.

Test reference end’s PIN2, which should be about 4.0V.

Test linear stabilizing output PIN1, which should be 5.4V.

Test the voltage difference between PIN28 and PIN30, which should be less than 90mV.

Test driving pin PIN27 and PIN22, and at least one PIN should have driving pulse output.

Test if there is any damage to the power device MOS semiconductor and diode.

±95V circuit.

3-16

Principle Description

Basic Principle of ±95V Circuit

±95V is generated from +12V through the non-isolated reverse converter, the chip is UC3843B of ONSEMI.±95V output is figured with overvoltage, over-current and short circuit protection, it will not be locked in the case of overvoltage, and be locked during over-current and short circuit protection.

The Maintenance Points of ±95V Circuit

First check if +12V output voltage is within the normal range, and if START signal is low level.

After power on, refer to the work flow shown as follows:

Test PIN8 of U1, the voltage should be +5V;

Test PIN4 of U1, there should have triangular wave of about 130 kHz;

Test PIN4 of U1, there should have drive pulse output;

Test PIN3 of U1, there should have triangular wave with the amplitude less than 1V.

If there is no output with the circuit, check if the output is over-current, check the feedback circuit, meanwhile, check if PHV_OCP is high level.

3.1.2 Principle of the Main Board

The schematic diagram of the main board is shown in figure below.

3-17

Principle Description

Probe

Receiving

Beamformer

Signal

process

Transmitting

4D

CW

Clock

Audio

Video

CPU

System monitor

& manage

Control panel

Display

Port

Power

Main

board

As shown in figure above, the main board unit is mainly configured with the following functional modules:

Transducer sockets;

Ultrasound receiving;

Ultrasound transmission;

Beam forming;

System clock;

Fig 3-4 Principle Diagram of Main Board

Signal processing;

System monitoring and managing;

Audio;

3-18

Principle Description

Video;

IO ports;

Where, the transducer sockets, ultrasound transmission and receiving, beam forming and system clock are categorized as analog power region. The signal processing, signal monitoring and managing, audio, video and I/O ports are categorized as digital power region.

The main board provides the interfaces for:

Transducer board;

Transmission board;

CW board;

4D board;

Keyboard board;

Flexible board for connecting the batteries;

CPU module;

LVDS display ports;

Power supply module;

Hard disk;

Reserved power interfaces;

Reserved signal interfaces;

Fan;

Speaker.

External interfaces include:

S_Video;

Network;

USB (2);

Extend interface.

The layout of the above-mentioned module interfaces in the main board is shown in figure below.

3-19

Principle Description

Adapter

port

Power module

CPU module

)

Inlet

fan

Dual

USB

port

Net port

SVIDEO

Display port

Notebook PC HDD

Extension port

Probe board

Probe port

Fan

Transmitting

CW board

Battery （11.1V,4400mAH)

Power

connect socket

Battery (11.1V,4400mAH)

Pencil

probe

port

Receiving

Main

board

Inlet

fan

Signal process

Digital power socket

Analog

power

socket

4D board

Fig 3-5 Layout of Each Module and Socket on the Main Board

3-20

Principle Description

Volt

IN

Filter

PHV2P

FilterPHV2N

Transmitting: transmitting, + high volt

Transmitting: transmitting, - high volt

Filter+12V (400mA)

Transmitting: transmitting drive volt

CW: pencil transmitting drive volt

Filter-12V (400mA)

Transmitting: transmitting drive volt

+5V1 (3260mA) Filter

Receiving: high volt isolation power

Transmitting: transmitting gate drive volt

Receiving: +5V_VCA

Receiving: channel select logic devices power supply

Probe port: extension module, 192-elemented probe power supply, etc. (control power off

and short circuit)

-5V1 (550mA) Filter

Receiving: high volt isolation power

Transmitting: transmitting gate drive volt

CW: CW filter power

A+12V

A-12V

A+12V

+3V6 (2100mA) Filter

Receiving: VCA power 3V3

Clock module: power

+2V8 (1000mA)

Filter

BF: LVDS power

Transmitting: transmitting gate drive volt

Receiving: ADS power 1V8

+1V5 (3000mA) Filter

BF: FPGA kernel

Receiving: ADS power 3V3

CW: CW filter power

BF: logic IO power 3V3

Transmitting: FPGA kernel

Filter

+95V (10mA)

-95V (10mA)

Receiving: high volt switch, + high volt

Receiving: high volt switch, - high volt

A+95V

Probe port: probe flash power

Receiving: ATGC power

Probe port: high volt switch, - high voltA-95V

A-95V

Probe port: high volt switch, + high voltA+95V

Filter

PHV1P

FilterPHV1N

Transmitting: transmitting, +high volt

Transmitting: transmitting, - high volt

3.1.2.1 Power Distribution

The power distribution of M7 is an enormous network, refer to the following two figures for the detailed distribution.

Fig 3-6 Front-end Power Tree of the Main Board

3-21

Volt

IN

+3.3V Filter

3V3stb

5Vstb_cpu Filter

LDO

Power manage

FPGA

CPU

1V5

Filter

DSP FPGAVolt transfer

+12V

CPU

Filter

+5V Filter

Display

Fan

2109 reserved: control panel, DVD

IDE

aud-codec

aud-AMP

ECG

Keyboard

2109 reserved

Keyboard

aud-codec

Display

1.5V

LED drive

2109 reserved

CLOCK

+2.8V Filter

DSP FPGA

SSRAM

+1.8V Filter

DSP FPGA

DDRII

USB_video capture

4D

DSP FPGA_IO

PCIE_PHY

-12V Filter 4D

0.7A

4D

CH7026

MF_ FPGA

DDRII

CH7026

MF_FPGA

Principle Description

Fig 3-7 Back-end Power Tree of the Main Board

3-22

3.1.2.2 Ultrasound Receiving

2 to 1 channel switching

circuit

128<->64 channel

switching

(high-voltage switch

16pcs)

POUT[1:128]

Transducer

TX[1:64]

RX[1:64]

64-channel receiving circuit

64-channel 5-level transmitting circuit

(MOS driver + high-voltage MOS)

Clock circuit

160MHz crystal

oscillator

Clock

allocator

160MHz LVPECL

DSP FPGA

BF FPGA

Beam forming

data bus

Beam forming

controlling bus

Transmission

controlling

bus

PCIE bus

Ultrasou nd back-

end

CW circuit

AFE chip

High-voltage

isolation

AD data

ATGC

CW data

40MHz

LVDS

160MHz

LVDS

40MHz*8ch

LVDS

160MHz

LVDS

Transmission

FPGA

High-voltage transmission

module

The basic structure of the front-end circuit is shown in figure below:

Fig 3-8 Diagram of Front-end Circuit

Principle Description

The receiving circuit of the main board consists of channel switching and receiving circuits.

Channel switching circuit

Transmitting and receiving circuits are 64 channels, but the actual transducer is 128 channels, so channel switching circuit is needed to switch the 64 channels of the transmitting and receiving into 128 channels. 8 channel conversion circuit is completed through 16-channel high voltage switch chip. Refer to the principle diagram for the principle.

Receiving circuit

The receiving circuit consists of high-voltage isolation circuit, voltage-controlled gain amplification circuit and high-speed ADC.

The high-voltage isolation circuit protects the receiving amplification circuit during transmission from high-voltage transmission pulse damage.

Voltage-controlled gain amplification circuit amplifies weak ultrasound echoes and transmits them to ADC for analog-to-digital conversion. It converts ultrasound echoes to digital signals for succeeding digital processing.

Voltage-controlled amplification circuit and high-speed ADC are all integrated in one AFE chip in M7.An AFE chip consists of 8-channel voltage-controlled gain amplification circuit and high-speed ADC. There are 8 AFEs in M7, composing 64 receiving channels.

3.1.2.3 Clock Circuit

3-23

The clock circuit provides low phase noise clock to the above-mentioned modules.

Principle Description

Crystal oscillator

Clock allocator

(12 chs LVDS)

160MHz(LVPECL)

BF FGPA

160MHz(LVDS)

Transmission

FPGA

160MHz(LVDS)

Frequency

divider

AFE chip * 8

DSP FPGA

160MHz(LVDS)

40MHz(LVDS)

Latch Clock to be latched

CW

demodulating

clock

CW sampling

clock

VTGC-DAC

clock

Frequency variable

(CMOS)

1MHz?(CMOS)

16MHZ(CMOS)

The clock circuit consists of crystal oscillator and clock allocator. The crystal oscillator is a 160Mhz oscillator with good phase noises. It distributes the clock signals via the clock allocator. The clock allocator has 12 LVDS outputs, and each one can split the frequency independently.

The outputs of the clock circuit are shown in figure below:

Fig 3-9 Diagram of Clock Circuit

3.1.2.4 Signal Processing

The signal processing is mainly implemented through two FPGAs: FPGA1 and FPGA2.

The FPGA1 mainly responsible for controlling on the front-end chips (such as channel selection CPLD, VGA gain control DAC, ADC, transducer and transducer extend module), beam forming, and orthogonal demodulation, generating transmission sequence pulse, etc.

The FPGA2 implements signal processing, data uploading, real time scan parameters loading, 4D controlling, etc. Data is uploaded through PCIE interface.

3.1.2.5 Power Management

Power management is basically implemented by the power management FPGA.

System power can be sorted as STANDBY power, CPU STANDBY power and normal working power in terms of power-on sequence.

STANDBY power is provided in the status of system POWERDOWN, including 3V3STB and 1V5_FPGA.These power supplies are mainly for powering the power managing FPGA devices for power management. The power of power managing FPGA reset signal, 10k crystal oscillator, power managing FPGA, CPU12V_OK and CPU5VSTB_OK, etc. As long as the adapter is connected or batteries are loaded, they will be powered.

CPU STANDBY power is required in the POWER DOWN status of PC module, including 5VSBY and 3V3_STB_CPU.In the system is POWER DOWN, this power is turned off. Turn on this power before starting the PC system.

3-24

Principle Description

No.

LED Number

Meaning

1

D227

12V

2

D18

VCC

3

D17

VDD

No.

Indicator

Drive signal

Definition

Notes

1

Work Status LED

WORKSTS_O

Dual-color, indicating the current status of the main unit:

It remains off when the system is turned off.

Press POWERBTN, the light flashes in green when S3# is disenabled.

When S3# is disenabled after system power on, the light turns into green.

WORKSTS_G

2

EDC Status LED

EDCSTS_G

Single color, indicating if the main unit is connected with the mains power:

When disconnected, the light is off, otherwise, in green.

3

Battery Status LED

BATSTS_O

Dual-color, indicating the current battery status:

It illuminates in orange color when battery is charging;

It illuminates in green color when battery is charging to full capacity;

It flashes in orange color if battery

BATSTS_G

The working power is provided when the system is working normally. Except the two types of powers mentioned above, other powers all belong to working powers. The following indicators are used for the working powers:

Table 3-7 Power indicators on main board

There are some indicators on the control panel for indicating power status. The signals are described in the following table:

Table 3-8 Indicators on the control panel

3-25

Principle Description

No.

Indicator

Drive signal

Definition

Notes

capacity is less than 30%, the battery is discharging, and the system is working;

It flashes in green color if battery capacity is more than 30%, the battery is discharging, and the system is at standby status;

It flashes in green and orange alternately if battery capacity is less than 30%, the battery is discharging, and the system is at standby status;

The light flashes in orange at the cycle of 0.5S, that is to say, 0.25S on, and

0.25S off.

The light flashes in green at the cycle of 1S, that is to say, 0.5S on, and 0.5S off. When the light flashes in in green and orange alternately, the green light is

0.25S on and 0.25S off; the orange light is 0.25S on and 0.25S off.

3.1.2.6 System Monitoring

The system monitoring includes voltage monitoring, temperature monitoring and fan rotating control.

Monitor on the voltage: direct measurement, including measurement of 12V, N12V, VCC, VDD, 1.5V,

2.8V, 1.8V and 1.2V;

It detects power board and front-end temperature.

Monitors and controls on fans and ventilation unit.

3.1.2.7 Video Processing

There are two versions for M7 video processing:

The first version:

On the PCBA of the main board 051-000098-00 VA, 051-000098-01 V1－V4, the following method

is adopted:

3-26

PC Module

COM-E

Multifunctional module FPGA

EP3C10

Ports

LVDS Dual

LPC

TTL2LVDS SN75LVDS

83

LVDS

VGA DAC ADV7125

VGA

TTL2DVI

TFP410

DVI

SVIDEO

Video

BUFFER

MAX9512

S-VIDEO

VIDEO

LCD backlight brightness adjust

LCD backlight on/off control

Control

panel

LCD open/close switch

LCD

parameter

board

SMBUS channel

Display module

Fig 3-10 Block diagram of video module (the first version)

COME

Module

CEGM4

5

LVDSA LVDSB

1024x768@60Hz

SDVO

B

SDVO

C

CVBS

S-

Video

MF

FPGA

EP3C16

Main LCD

S-Video

CVBS

External

Display

External

CRT

Video

Encoder

CH7026B

DVI Transmitter

TFP410

Frame Buffer

MT47H64M16HR

S-Video

VGA

1024x768@60Hz

DVI

1024x768@60Hz

PAL

NTSC

PAL

NTSC

RGB888

1024x768@60Hz

LVDS

1024x768@60Hz

SSC

CY25562

I2C

0-400KHz

LPC

33MHz

Principle Description

Of which, the video signals of LVDS, VGA, and DVI are all from LVDS of PC module.

Both S-VIDEO and VIDEO are generated by SVIDEO of PC module.

The display switch is on the control panel.

The display parameters are saved in EEPROM of LCD parameter board, they are accessed by SMBUS of the PC module.

The second version:

On the PCBA of the main board 051-000098-02 V1, the following method is adopted:

External display video signal is generated from VGA of PC module.

S-Video, CVBS, DVI, and LVDS video signals are all generated from LVDS of PC module.

The display switch is on the control panel.

Fig 3-11 Block diagram of video module (the second version)

3-27

Principle Description

CON1

CON2

PIN NAME

PIN PIN NAME

1

GND

2

POUT1

3

GND

1

POUT69

2

POUT70

3

POUT71

4

POUT2

5

GND

6

POUT3

4

POUT72

5

POUT73

6

POUT74

7

GND

8

POUT4

9

POUT5

7

POUT75

8

GND

9

POUT76

10

POUT6

11

POUT7

12

GND

10

GND

11

POUT77

12

POUT78

13

POUT8

14

GND

15

POUT9

13

POUT79

14

POUT80

15

GND

16

GND

17

POUT10

18

POUT11

16

POUT81

17

GND

18

POUT82

19

POUT12

20

POUT13

21

GND

19

GND

20

POUT83

21

POUT84

22

POUT14

23

GND

24

POUT15

22

POUT85

23

POUT86

24

GND

25

GND

26

POUT16

27

POUT17

25

POUT87

26

GND

27

POUT88

28

POUT18

29

POUT19

30

GND

28

GND

29

POUT89

30

POUT90

31

POUT20

32

GND

33

POUT21

31

POUT91

32

POUT92

33

GND

34

GND

35

POUT22

36

POUT23

34

POUT93

35

GND

36

POUT94

37

POUT24

38

POUT25

39

GND

37

GND

38

POUT95

39

POUT96

40

POUT26

41

GND

42

POUT27

40

POUT97

41

POUT98

42

GND

43

GND

44

POUT28

45

POUT29

43

POUT99

44

GND

45

POUT100

46

POUT30

47

POUT31

48

GND

46

POUT101

47

POUT102

48

POUT103

49

POUT32

50

GND

51

POUT33

49

POUT104

50

POUT105

51

GND

52

GND

53

POUT34

54

POUT35

52

POUT106

53

GND

54

POUT107

55

POUT36

56

POUT37

57

GND

55

GND

56

POUT108

57

POUT109

58

POUT38

59

GND

60

POUT39

58

POUT110

59

POUT111

60

POUT112

61

GND

62

POUT40

63

POUT41

61

POUT113

62

GND

63

POUT114

The display parameters are saved in EEPROM of LCD parameter board, they are accessed by SMBUS of the PC module.

3.1.2.8 Interfaces of Main Board

Interfaces of Main Board and Transducer Board

Signals of the main board and transducer board are defined in table below.

Table 3-9 Interfaces of the main board and transducer board

3-28

Principle Description

CON1

CON2

64

POUT42

65

POUT43

66

GND

64

POUT115

65

POUT116

66

POUT117

67

POUT44

68

GND

69

POUT45

67

POUT118

68

POUT119

69

GND

70

GND

71

POUT46

72

POUT47

70

POUT120

71

GND

72

POUT121

73

POUT48

74

POUT49

75

GND

73

GND

74

POUT122

75

POUT123

76

POUT50

77

GND

78

POUT51

76

POUT124

77

POUT125

78

POUT126

79

GND

80

POUT52

81

POUT53

79

POUT127

80

GND

81

POUT128

82

POUT54 83

POUT55 84

GND 82

PROBE_SPI CLK

83

PROBE_ SPICS_N

84

PROBE_S PIDIN

85

POUT56

86

GND

87

POUT57

85

PROBE_SPI DOUT 86

PROBE_ FLASH_ WP_N

87

PRB_DP_ FREEZE_ N

88

GND 89

POUT58 90

POUT59 88

A+3V3_PRB 89

GND 90

A+85V_P ROBE

91

POUT60 92

POUT61 93

GND 91

PROBE_PL UG

92

CLK_192 _PROBE

93

DIN1_192 _PROBE

94

POUT62 95

GND 96

POUT63 94

DIN2_192_P ROBE

95

LE_N_19 2_PROBE

96

A-85V_PR OBE

97

GND

98

POUT64

99

POUT65

97

EXPRESS_ PRESENT_ N

98

PRB_DP_ SWITCH_ N

99

PROBE_P RESENT_ N

100

POUT66 101

POUT67 102

GND 100

GND 101

GND

102 GND 103

GND 104

GND 105

POUT68 103

A+5V_PROB E

104

A+5V_PR OBE

105 A+5V_PR OBE

SIGNAL NAME

DESCRIPTION

POUT[1:128]

Transmitting signals and receiving echo signals

SPIDIN_PROBE

Probe Flash SPI Data IN

SPIDOUT_PROBE

Probe Flash SPI Data OUT

SPICS_N_PROBE

Probe Flash SPI CS_N

SPICLK_PROBE

Probe Flash SPI CLOCK

The signals are described in the following table:

Table 3-10 Interface & signals of main board and transducer board

3-29

Principle Description

SIGNAL NAME

DESCRIPTION

FLASH_WP_N_PROBE

Probe Flash Write Protect

FLASHSPIOE_N_PROB E

Probe Flash SPI enable

CTRL_A+3V3_PROBE_ N

Enable Flash power of transducer CTRL_A+5V_PROBE

Enable transducer extend power

PRB_PRESENT

Transducer present signal

EXP_PRESENT

Transducer extend module present signal

192_CLK_PROBE

High-voltage switch clock of 192-elemented transducer

192_LE_N_PROBE

Enabling signal of 192-elemented transducer high-voltage switch

192_DIN1_PROBE

High-voltage switch data 1 of 192-elemented transducer

192_DIN2_PROBE

High-voltage switch data 2 of 192-elemented transducer

192_SPIOE_N_PROBE

Enabling SPI of 192-elemented transducer

CTRL_192HV _PROBE

Control high-voltage output of 192 transducer

PRB_DP_FRZ

FREEZE signal of real-time bi-planar transducer

PRB_DP_SW

Switching signal of real-time bi-planar transducer

PRB_PLUG_N

Detection of connection and disconnection with power on of the transducer

CON1（J6）

SIG

1

GND

2

GND

61

EMIT33

62

GND

3

EMIT1

4

EMIT2

63

GND

64

EMIT36

5

EMIT3

6

EMIT4

65

EMIT35

66

GND

Interfaces of Main Board and Transmission Board

Signals of the main board and transmission board are defined in table below.

Table 3-11 Interfaces of main board and transmission board

3-30

Principle Description

7

GND

8

GND

67

GND

68

EMIT38

9

EMIT5

10

EMIT6

69

EMIT37

70

GND

11

EMIT7

12

EMIT8

71

GND

72

EMIT40

13

GND

14

GND

73

EMIT39

74

GND

15

EMIT9

16

EMIT10

75

GND

76

EMIT42

17

EMIT11

18

EMIT12

77

EMIT41

78

GND

19

GND

20

GND

79

GND

80

EMIT44

21

EMIT13

22

EMIT14

81

EMIT43

82

GND

23

GND

24

EMIT16

83

GND

84

EMIT46

25

EMIT15

26

GND

85

EMIT45

86

GND

27

GND

28

EMIT18

87

GND

88

EMIT48

29

EMIT17

30

GND

89

EMIT47

90

GND

31

GND

32

EMIT20

91

GND

92

EMIT50

33

EMIT19

34

GND

93

EMIT49

94

GND

35

GND

36

EMIT22

95

GND

96

EMIT52

37

EMIT21

38

GND

97

EMIT51

98

GND

39

GND

40

EMIT24

99

GND

100

EMIT54

41

EMIT23

42

GND

101

EMIT53

102

GND

43

GND

44

EMIT26

103

GND

104

EMIT56

45

EMIT25

46

GND

105

EMIT55

106

GND

47

GND

48

EMIT28

107

EMIT57

108

EMIT58

49

EMIT27

50

GND

109

GND

110

EMIT60

51

GND

52

EMIT30

111

EMIT59

112

GND

53

EMIT29

54

GND

113

EMIT61

114

EMIT62

55

GND

56

EMIT32

115

GND

116

EMIT64

57

EMIT31

58

GND

117

EMIT63

118

GND

59

GND

60

EMIT34

119

GND

120

GND

3-31

Principle Description

CON2（J5）

SIG

1

PHV1_N

2

PHV1_P

31

GND

32

NC

3

PHV1_N 4

PHV1_P 33

HSSB_TX0RF CKN

34

A+75V_sub 5

NC 6 NC 35

HSSB_TX0RF CKP

36

NC 7

PHV2_N

8

PHV2_P

37

GND

38

GND

9

PHV2_N 10

PHV2_P 39

HSSB_TX0RB CKN

40

CLK_N_EMIT 11

NC 12

NC 41

HSSB_TX0RB CKP

42

CLK_P_EMIT 13

A-12V

14

A+12V

43

GND

44

GND

15

A-12V 16

A+12V 45

HSSB_TX0RN 46

HSSB_TX0TFCK N

17

A-5V1 18

A+5V1 47

HSSB_TX0RP 48

HSSB_TX0TFCK P

19

A+2V8

20

A+1V5

49

GND

50

GND

21

A+2V8 22

A+1V5 51

HSSB_TX1RN 52

HSSB_TX0TBCK N

23

RATE_P _EMIT

24

RESET_EMI T

53

HSSB_TX1RP 54

HSSB_TX0TBCK P

25

RATE_N _EMIT

26

CLOCKEN_ N_EMIT

55

GND 56

GND 27

TMS 28

TDI_EMIT_T DO_BF

57

HSSB_TX0TN 58

HSSB_TX1TN 29

TDO_EM IT

30

TCK 59

HSSB_TX0TP 60

HSSB_TX1TP

3-32

Principle Description

SIGNAL

1

GND

2

GND

3

CW1

4

CW2

5

GND

6

GND

7

CW3

8

CW4

9

GND

10

GND

11

CW5

12

CW6

13

GND

14

GND

15

CW7

16

CW8

17

GND

18

GND

19

CW9

20

CW10

21

GND

22

GND

23

CW11

24

CW12

25

GND

26

GND

27

CW13

28

CW14

29

GND

30

GND

31

CW15

32

CW16

33

GND

34

GND

35

CW17

36

CW18

37

GND

38

GND

39

CW19

40

CW20

Interface of Main Board and CW Board

Signals between the main board and CW board interfaces are defined as Table 3-12 and Table 3-14 .

Table 3-12 Definition of Signals of CW CON1

3-33

Wherein the signals of CW CON1 are defined as follows:

Signal name

Description

CW[20:1]

CW echo signal

1

A-5V1

2

A+5V1

21

TPU1_PENCIL_CW

22

AD_SDI0

3

A-5V1

4

A+5V1

23

GND

24

GND

5

GND

6

GND

25

TPU0_PENCIL_CW

26

AD_SCK0

7

BORADID_C W

8

PPID_CW

27 GND

28

GND

9

CWPPPRESE NT

10

AD8333_EBL_CW

29 GND

30

AD_CNV1_ CW

11

GND

12

GND

31

AD8333_4LO0_CW

32

GND

13 AD_SDO1

14

SW_CTRL1

33

AD8333_4LO1_CW

34

AD_CNV0_ CW

15

AD_SDI1

16

SW_CTRL0

35

GND

36

GND

17 GND

18

GND

37

VOL_ADJ_SDA_CW

38

VOL_ADJ_ SCK_CW

19

AD_SCK1

20

AD_SDO0

39

A+12V

40

A+3V6

Signal name

1

12V

2

12V

3

12V

4

12V

5

12V

6

12V

Table 3-13 Signals Definition of CW CON1 Socket

Table 3-14 Signals Definition of CW CON2 Socket

Principle Description

Interfaces of Main Board and 4D Board

The interfaces between the main board and the 4D board are defined in table below.

Table 3-15 Signal Definition of main board and 4D board

3-34

Principle Description

Signal name

7

12V

8

12V

9

GND

10

GND

11

GND

12

GND

13

GND

14

GND

15

GND

16

GND

17

-12V

18

-12V

19

-12V

20

-12V

21

-12V

22

-12V

23

GND

24

GND

25

GND

26

GND

27

GND

28

GND

29

VDD

30

VDD

31

GND

32

GND

33

VCC

34

VCC

35

GND

36

GND

37

NC

38

NC

39

NC

40

NC

41

NC

42

NC

43

NC

44

NC

45

NC

46

NC

47

NC

48

NC

49

GND

50

GND

51

POWEREN_N

52

GND

53

HALL

54

GND

55

NC

56

GND

57

SPI_CLK

58

GND

3-35

Principle Description

Signal name

59

SPI_DAT

60

GND

61

SPI_SYNC

62

GND

63

FD_ID

64

GND

65

AD_SCLK

66

GND

67

AD_DIN

68

GND

69

AD_DOUT

70

AD_NCS

NO.

NAME

NO.

NAME

1

VDD

2

VDD

3

GND

4

GND

5

RXE0-

6

RXE1-

7

RXE0+

8

RXE1+

9

GND

10

GND

11

RXE2-

12

RXEC-

13

RXE2+

14

RXEC+

15

GND

16

GND

17

RXE3-

18

GND

19

RXE3+

20

GND

No:

Name

1

+12V

2

+12V

3

+12V

Interfaces of Main Board and Display Module

There are 3 sockets in all for the main board and display module, refer to the following 3 tables for the definitions:

Table 3-16 Definition of signals of the main board end (J25) of the LVDS socket

Table 3-17 Socket definition of display power supply (J26)

3-36

Principle Description

4

BL_On/Off

5

BL_ADJ

6

GND

7

GND

8

GND PIN

Signal name

1

VDD

2

GND

3

SCL

4

SDA

SIG

1

ROUTP

2

ROUTN

3

NC 4 LOUTP

5

LOUTN

No.

Signal name

No.

Signal name

1

FANLF_SP

2

FANLF_PWR

3

FANLFM_CTRL

4

FANLMC_PWR

5

FANLM_SP

6

FANC_CTRL

Table 3-18 Definition of Color Temperature Correction Socket (J24)

Interfaces of Main Board and Speakers

The interfaces of the main board and speakers are defined in the following table:

Table 3-19 Interfaces of Main Board and Speakers (J27)

Socket between Fan and Main Board

The interfaces of the main board and fan are defined in the following table:

Table 3-20 Socket Definition of Fan Power Supply (J29)

3-37

7

FANLB_SP

8

FANC_SP

9

FANLBR_CTRL

10

FANLB_PWR

11

FANR_SP

12

FANR_PWR

FPGA JTAG Sockets of Main Board Power Management

No.

Signal name

1

VPUMP

2

VJTAG

3

GND

4

TDO

5

TDI 6 TCK

7

TMS

8

TRST

No.

Signal name

No.

Signal name

1

NC 2 GND

3

NC 4 GND

5

GND

6

GND

7

NC 8 ATA_ACT#

9

SYS_RESET#

10

GND

11

CPRT_PRINT

12

BK_STS

13

CPRT_BUSY

14

GND

The FPGA JTAG sockets of the main board are defined in the following table:

Table 3-21 Signal Definition of FPGA JTAG sockets (J23) of Power Management

Principle Description

Reserved Signal Interfaces

The reserved signal interfaces are defined in the following table:

Table 3-22 Definition of Reserved Signal Interfaces (J17)

3-38

15

GND

16

SVIDEO_Y2

17

PWR_SSW

18

SVIDEO_C2

19

GND

20

GND

No.

Name

No.

Name

1

+12V

2

+12V

3

+12V

4

+12V

5

Gnd

6

Gnd

7

Gnd

8

Gnd

9

Gnd

10

Gnd

11

+5V

12

+5V

13

+5V

14

+5V

15

+5V

16

+5V

17

+5V

18

+5V

19

Gnd

20

Gnd

21

Gnd

22

Gnd

23

+3.3V

24

+3.3V

No.

Name

Direction

1

Gnd

\ 6 Gnd

\

Reserved Power Interfaces;

The reserved power interfaces are defined in the following table:

Table 3-23 Definition of Reserved Power Interfaces (J20)

Principle Description

The Interface between the Main Board and Adapter

The interfaces between the main board and the adapter are defined as follows:

Table 3-24 Interface (J21) of Main Board and Speakers

3-39

Principle Description

No.

Name

Direction

2

Gnd

\ 4 Gnd

\ 3 +12V

In 7 +12V

In 5 +12V

In 8 +12V

In

No.

Signal name

No.

Signal name

1

EDC_PWR

2

EDC_PWR

3

EDC_PWR

4

EDC_PWR

5

EDC_PWR

6

EDC_PWR

7

EDC_GND

8

EDC_GND

9

EDC_GND

10

EDC_GND

11

EDC_GND

13

-12V

14

STS_EDC#

15

GND

16

GND

17

POWER_ON#

18

CPU12V_OK#

19

T_D+

20

T_D-

21

GND

22

GND

23

GND

24

GND

25

12V+

26

12V+

27

12V+

28

12V+

The Interface between the Main Board and Power Module

The interfaces between the main board and the power module consist of digital socket and analog power socket.

The digital socket is defined in the following table:

Table 3-25 Socket Definition of igital Socket (J22)

3-40

Principle Description

No.

Signal name

No.

Signal name

29

GND

30

GND

31

5V+

32

5V+

33

GND

34

GND

35

5VSTB_OK#

36

5VSTB_EN#

37

GND

38

GND

39

5VSTB_CPU

40

3V3STB

41

GND

42

GND

43

3V3

44

3V3

45

GND

46

GND

47

2V8

48

1V5

49

GND

50

GND

51

1V8

52

1V8

53

GND

54

GND

55

PWR_RX

56

PWR_CONF_N

57

PWR_TX

58

PWR_RST

59

GND

60

GND

61

PRT_BATA

62

PRT_BATB

63

BATSTS_O

64

BATSTS_G

No.

Signal name

No.

Signal name

1

GND

2

GND

3

A5V1

4

A5V1

5

A5V1

6

A5V1

7

GND

8

GND

9

-A5V1

10

GND

11

-A12V

12

GND

Table 3-26 Signal Definition of Socket (J9) between Analog Power and Main Board

3-41

Principle Description

No.

Signal name

No.

Signal name

13

GND

14

GND

15

A1V5

16

A1V5

17

A1V5

18

A1V5

19

GND

20

GND

21

A3V6

22

A3V6

23

GND

24

GND

25

A2V8

26

GND

27

A12V

28

GND

29

PHV1+

30

PHV2+

31

GND

32

GND

33

PHV1-

34

PHV2-

35

GND

36

GND

37

85V+

38

GND

39

GND

40

85V-

Definition of Signal

A1

USB+4

B1

USB-4

C1

USB+5

D1

USB-5

A2

VBUS_SYS45

B2

GND

C2

VBUS_SYS45

D2

GND

A3

GND

B3

VGA_HS

C3

VGA_RED

D3

VGA_GREEN

A4

UART_RX0

B4

VGA_VS

C4

GND

D4

SDISP_PRT_N

A5

UART_TX0

B5

GND

C5

VGA_BLUE

D5

A6

GND

B6

AUDIO_L

C6

GND

D6

A7

BWPRT _PRINT

B7

AUDIO_R

C7

D7

GND

Interfaces of Main Board and I/O Extend Board

Signal definition between master board and I/O extended board is shown as table below.

Table 3-27 Signal Definition between Mater Board and I/O Extended Socket-J1

3-42

Principle Description

Definition of Signal

A8

BWPRT_BUSY

B8

GND

C8

DVI_D0+

D8

DVI_D0-

A9

GND

B9

ECG_PWR

C9

DVI_D1+

D9

DVI_D1-

A10

MIC_L

B10

DVI_HPD

C10

GND

D10

GND

A11

MIC_R

B11

C11

DVI_CLK+

D11

DVI_CLK-

A12

VIDEO

B12

ECG_TX

C12

DVI_D2+

D12

DVI_D2-

\ \ B13

ECG_RX

\ \ D13

ECG_PRT

No.

Name

No.

Name

1

+3.3V

2

+3.3V

3

+3.3V

4

+3.3V

5

Gnd

6

Gnd

7

Gnd

8

Gnd

9

+5V

10

+5V

11

+5V

12

+5V

13

Gnd

14

Gnd

15

Gnd

16

Audio Out

17

Gnd

18

Gnd

19

Work_Status_O

20

Work_Status_G

21

Battery_Status_O

22

Battery_Status_G

23

Gnd

24

EDC_Status_G

25

USB_DN

26

LCD_SW

27

USB_DP

28

Power_BTN

29

Gnd

30

Gnd

The Interfaces between the Main Board and the Keyboard

The interfaces between the main board and the keyboard are defined in table below.

Table 3-28 Signal Definition between Master Board and Keyboard Board-J19

3-43

Principle Description

No.

Label of the Testing Point

Network of the Testing Point

1

TP206-GND

Ground network

2

TP248-VAA0

Voltage of video DA chip (3.3V)

3

TP228-1V5STB

Power management standby voltage (1.5V)

4

TP249-SV-VDD

Voltage of video driving chip (3.3V)

5

TP202-12V

12V voltage (12V)

6

TP246-3V3S_CPU

PC module standby (3.3V)

7

TP7-PWROK

Power OK signal of PC module (3.3V)

8

TP9-S3

Initialization status indicating signal S3 of PC module (3.3V)

3.1.2.9 Testing Points of Main Board and LED Indicator Light

The testing points of the main board are shown in the following figures:

Fig 3-12 Testing Points of Main Board

Table 3-29 List of Testing Points of Main Board

3-44

Principle Description

No.

Label of the Testing Point

Network of the Testing Point

9

TP8-S4

Initialization status indicating signal S4 of PC module (3.3V)

10

TP10-S5

Initialization status indicating signal S5 of PC module (3.3V)

11

TP224-EDC_PWR

12V input of the adapter (12V)

12

TP218-N12V

-12V voltage (-12V)

13

TP215-5VSBY

Standby voltage (5V)

14

TP203-VDD

VDD voltage (3.3V)

15

TP217-D1V5

D1V5 voltage (1.6V)

16

TP216-D2V8

D2V8 voltage (3.0V)

17

TP6-CPUBTN

Button start-up signal of PC module (3.3V)

18

TP214-D1V8

D1V8 voltage (1.8V)

19

TP201-VCC

VCC voltage (5V)

20

TP20-IQ_VTT

VTT voltage of DDR2 (0.9V)

21

TP236-VCCINT_DSP_MF

FPGA core voltage (1.2V)

22

TP226-12V_4D

12V voltage of 4D module (12V)

23

TP235-D2V5

D2V5 voltage (2.5V)

24

TP19-UP_VTT

VTT voltage of DDR2 (0.9V)

25

TP227-3V3STB

Standby voltage (3.3V)

26

TP146-A+5V_PROBE

Transducer port 5V

27

TP148-A+3V3_PRB

Transducer port 3.3V

28

TP147-A+5V1

Analog 5V

29

TP155-A-5V_HVISO2

High-voltage isolation power

30

TP241-A-85V_HVSW

High-voltage switch power

31

TP151-A+85V_HVSW

High-voltage switch power

32

TP153-A+5V_HVISO2

High-voltage isolation power

33

TP152-A+5V_HVISO1

High-voltage isolation power

3-45

Principle Description

No.

Label of the Testing Point

Network of the Testing Point

34

TP193-A-12V

-12V power

35

TP165-A+1V8_ADS

AFE power

36

TP194--12V_A

-12V power

37

TP163-A+3V3_VCA

AFE power

38

TP164-A+3V3_ADS

AFE power

39

TP178-A+5V_ATGC

ATGC power

40

TP162-A+5V_VCA

AFE power

41

TP144-A+3V3_CLOCK

Clock power

42

TP240-VBAT

Voltage of the button cell (3V)

43

TP190-A+1V5

Analog 1.5V power

44

TP189-＋1V5_A

Analog 1.5V power

45

TP184-＋5V1_A

Analog 5V power

46

TP137-A+5V1

Analog 5V power

47

TP196-+12V_A

Analog 12V power

48

TP195-A+12V

Analog 12V power

49

TP187-+2V8_A

Analog 2.8V power

50

TP185-+3V6_A

Analog 3.6V power

51

TP186-A+3V6

Analog 3.6V power

52

TP180--95V_A

Analog -95V power

53

TP188-A+2V8

Analog 2.8V power

54

TP192--5V1_A

Analog -5V power

55

TP36-+95V_A

Analog 95V power

56

TP191-A-5V1

Analog -5V power

57

TP38-A-95V

Analog -95V power

58

TP179-A-5V_ATGC

ATGC-5V power

59

TP37-A+95V

Analog 95V power

3-46

Table 3-30 Main board LED indicator light

No.

LED

Indication

1

D227

12V

2

D18

VCC

3

D17

VDD

4

D220

Multifunctional FPGA configuration indicator light

5

D11

DSP FPGA configuration indicator light

6

D15

Beam FPGA configuration indicator light

PHV1_P

64-channel transmit

signal

Mos drive

Transmit

control

Mos drive

PHV2_P

PHV1_N

PHV2_N

GND

64-channel transmit

64

1

System control bus

Scan control signal

64

Principle Description

3.1.3 Principle of Transmitting Board

The main board sends commands to transmitting board, the transmitting board calculates the parameters in real time and controls the high-voltage pulses necessary for the output of the transmitting circuit. The schematic diagram is shown below:

Fig 3-13 Structure Diagram of Ultrasound Transmission

3-47

3.1.3.1 Power Structure of Transmission Board

PHV1_N

PHV1_P

PHV2_P

PHV2_N

Capacitor filter

A+12V

A-12V

A+2V5

VDD+11V

VSS-11V-HIGH

A+2V8

LDO

PHV1_N

PHV1_P

PHV2_P

PHV2_N

LDO

AVDD1+11V

DVDD1+11V

DVDD2+11V

AVSS-11V-HIGH

DVSS-11V-HIGH

LC

VCCAUX

VF+2V5

VLL+2V5

LC

A+5V1

P+3v3

LDO

A+1V5

VF+1V2

LDO

VSS-11V-LOW

AVSS-11V-LOW

DVSS-11V-LOW

LC

LDO

100mA

500mA

1600mA

360mA

300mA

Principle Description

Fig 3-14 Structure Diagram of Transmitting Board Power Supply

3.1.3.2 Definition of Transmission Board Interface

Detailed definition of external interface of transmission board is shown below:

3-48

Principle Description

Interface with the Main Board

（DSP_FPGA）HSSB_TX0TP/N，HSSB_TX1TP/N，

HSSB_TX0TBCKP/N，HSSB_TX0TFCKP/N,HSSB_TX0RP/N，

HSSB_TX1RP/N, HSSB_TX0RBCKP/，

HSSB_TX0RFCKP/NCLOCKEN_N_EMIT

(BF_FPGA) RESET_EMIT，RATE_P/N_EMIT

(clock) CLK_P/N_EMIT

Interface with analog part of main board

64-channel transmission pulse/echo POUT[EMIT64..1]

Interface with power of main board

A+12V,A-12V,A+5V1,A-5V1,A+2V8，

A+1V5,PHV1_P,PHV1_N,PHV2_P,PHV2_N

JTAG signal

TCK，TDO_EMIT，TMS，TDI_EMIT_TDO_BF

Bus socket

J3, bottom

JTAG

socket

J1, front

Bus socket

J2, bottom

Table 3-31 Detailed Definition of External Interface of Transmission Board

The instrumentation diagram of transmission board is shown in the following figure. The figure marks the sockets and their names.

3-49

Fig 3-15 The instrumentation diagram of transmission board

1

JTAG_TCK

2

JTAG_ TDO_EMIT

3

JTAG_ TMS

4

JTAG_ TDI_EMIT_TDO_BF

5

P+3V3

6

GND

7

NC 8 NC

1

GND

2

GND

61

EMIT33

62

GND

3

EMIT1

4

EMIT2

63

GND

64

EMIT36

5

EMIT3

6

EMIT4

65

EMIT35

66

GND

7

GND

8

GND

67

GND

68

EMIT38

9

EMIT5

10

EMIT6

69

EMIT37

70

GND

11

EMIT7

12

EMIT8

71

GND

72

EMIT40

13

GND

14

GND

73

EMIT39

74

GND

15

EMIT9

16

EMIT10

75

GND

76

EMIT42

17

EMIT11

18

EMIT12

77

EMIT41

78

GND

19

GND

20

GND

79

GND

80

EMIT44

21

EMIT13

22

EMIT14

81

EMIT43

82

GND

23

GND

24

EMIT16

83

GND

84

EMIT46

25

EMIT15

26

GND

85

EMIT45

86

GND

27

GND

28

EMIT18

87

GND

88

EMIT48

29

EMIT17

30

GND

89

EMIT47

90

GND

31

GND

32

EMIT20

91

GND

92

EMIT50

Table 3-32 Definition of J1 of JTAG Socket

Table 3-33 Detailed Definition of Bus Socket J2

Principle Description

3-50

Principle Description

33

EMIT19

34

GND

93

EMIT49

94

GND

35

GND

36

EMIT22

95

GND

96

EMIT52

37

EMIT21

38

GND

97

EMIT51

98

GND

39

GND

40

EMIT24

99

GND

100

EMIT54

41

EMIT23

42

GND

101

EMIT53

102

GND

43

GND

44

EMIT26

103

GND

104

EMIT56

45

EMIT25

46

GND

105

EMIT55

106

GND

47

GND

48

EMIT28

107

EMIT57

108

EMIT58

49

EMIT27

50

GND

109

GND

110

EMIT60

51

GND

52

EMIT30

111

EMIT59

112

GND

53

EMIT29

54

GND

113

EMIT61

114

EMIT62

55

GND

56

EMIT32

115

GND

116

EMIT64

57

EMIT31

58

GND

117

EMIT63

118

GND

59

GND

60

EMIT34

119

GND

120

GND

1

PHV1_N

2

PHV1_P

31

GND

32

NC

3

PHV1_N 4

PHV1_P 33

HSSB_TX0RFC KN

34

A+75V_sub

5

NC 6 NC 35

HSSB_TX0RFC KP

36

NC 7

PHV2_N

8

PHV2_P

37

GND

38

GND

9

PHV2_N 10

PHV2_P 39

HSSB_TX0RBC KN

40

CLK_N_EMIT

11

NC 12

NC 41

HSSB_TX0RBC KP

42

CLK_P_EMIT 13

A-12V

14

A+12V

43

GND

44

GND

15

A-12V 16

A+12V 45

HSSB_TX0RN 46

HSSB_TX0TFC KN

Table 3-34 Detailed Definition of Bus Socket J3

3-51

Principle Description

17

A-5V1 18

A+5V1 47

HSSB_TX0RP 48

HSSB_TX0TFC KP

19

A+2V8

20

A+1V5

49

GND

50

GND

21

A+2V8 22

A+1V5 51

HSSB_TX1RN 52

HSSB_TX0TBC KN

23

RATE_P_EMIT 24

RESET_EMIT 53

HSSB_TX1RP 54

HSSB_TX0TBC KP

25

RATE_N_EMIT 26

CLOCKEN_N_E MIT

55

GND 56

GND

27

TMS 28

TDI_EMIT_TDO _BF

57

HSSB_TX0TN 58

HSSB_TX1TN 29

TDO_EMIT

30

TCK

59

HSSB_TX0TP

60

HSSB_TX1TP

3.1.4 4D Driving Board

The principle diagram of 4D driving board is shown in figure below. The interface signals of 4D driving board and main board consist of power, SPI interface signals of ADC and DAC, and the enabling signal of power module. The interface signals of 4D driving board and transducer connecting board are: two driving signals A and B, HALL signal and its 5V power supply, and temperature and angle signals of TEE transducer. 4D driving board mainly implements the following two functions:

 Amplifies the command-driven current and generates signals of appropriate power to drive

the transducer to the desired position.

 As a reserved design, it amplifies the temperature and angle signals of the TEE transducer

and provides data collection channel.

3-52

Principle Description

Transducer

board

Error

amplification

Signal

amplification

DAC

Power

amplification

Load (4D transducer and electrical motor)

Setting current of phase A

Current feedback

Driving voltage

Current detection

resistor

Driving current

SPI Interface

Driving of phase A

Current amplification of phase B (same as phase A)

Setting current of

phase B

Driving of phase B

ADC

SPI Interface

VCC

Load (TEE Transducer)

Amplification

circuit of

temperature signal

Amplification

circuit of angle

signal

TEE circuit

Adjustable Power Module

POWER_EN

PLV_DAC

PAVPP

PNAVPP

Main Board

4D&TEE Driving Board

4D Driving Circuit

Signal name

Direction

Signal name

Direction

1

12V

Input

2

12V

Input

3

12V

Input

4

12V

Input

5

12V

Input

6

12V

Input

7

12V

Input

8

12V

Input

9

GND

/

10

GND

/

11

GND

/

12

GND

/

13

GND

/

14

GND

/

15

GND

/

16

GND

/

17

-12V

Input

18

-12V

Input

Fig 3-16 Block diagram of 4D driving board

3.1.4.1 Definition of the Interface between the 4D Driving Board and Main

Board

Signals of the socket are defined as follows:

Table 3-35 Definition of Socket between 4D Driving Board and Main Board

3-53

Principle Description

Signal name

Direction

Signal name

Direction

19

-12V

Input

20

-12V

Input

21

-12V

Input

22

-12V

Input

23

GND

/

24

GND

/

25

GND

/

26

GND

/

27

GND

/

28

GND

/

29

VDD

Input

30

VDD

Input

31

GND

/

32

GND

/

33

VCC

Input

34

VCC

Input

35

GND

/

36

GND

/

37

NC / 38

NC / 39

NC / 40

NC / 41

NC / 42

NC / 43

NC / 44

NC

/

45

NC / 46

NC

/

47

NC / 48

NC / 49

GND

/

50

GND

/

51

PWR_EN

Input

52

GND

/

53

HALL

Output

54

GND

/

55

NC / 56

GND

/

57

SPI_CLK

Input

58

GND

/

59

SPI_DAT

Bidirectional

60

GND

/

61

SPI_SYNC

Input

62

GND

/

63

FD_ID

Bidirectional

64

GND

/

65

AD_SCLK

Input

66

GND

/

67

AD_DIN

Input

68

GND

/

69

AD_DOUT

Output

70

AD_NCS

Input

3-54

Principle Description

Signal name

Direction

1

AGND

/

2

5V

Output

3

HALL

Input

4

ANGLE

Input

5

AGND

/ 6 T+

Input

7

T-

Input

8

PHASE_B_NEG

Output

9

PHASE_B_NEG

Output

10

PHASE_B_POS

Output

11

PHASE_B_POS

Output

12

PHASE_A_NEG

Output

13

PHASE_A_NEG

Output

14

PHASE_A_POS

Output

15

PHASE_A_POS

Output

Note: wherein the direction of signal is defined as: the signal from main board to 4D driving board is input signal, the signal from 4D driving board to main board is output signal.

3.1.4.2 Definition of the Interface between the 4D Driving Board and

Transducer Connecting Board

The wire-to-board socket (WTB) of 4D driving board signals are defined as follows:

Table 3-36 Definition of Socket between 4D Driving Board and Transducer Connecting Board

Note: wherein the direction of signal is defined as: the signal from transducer connecting board to 4D driving board is input signal, the signal from 4D driving board to transducer connecting board is output signal.

3.1.4.3 Testing Points of 4D Driving Board

The testing points of 4D driving board are listed in the following table:

3-55

Table 3-37 List of Testing Points of 4D Driving Board

No.

Label of the Testing Point

Signal definition of testing points 1

TP3

Command current bias voltage from DAC (DAC_BIAS)

2

TP4

Output of command current error amplification circuit of phase B

3

TP5

Positive output of driving current of phase B (PHASE_B_POS)

4

TP6

Command current of phase B from DAC (DAC_B_SET)

5

TP7

Output of command current signal amplification circuit of phase B

6

TP8

Command current of phase A from DAC (DAC_A_SET)

7

TP9

Output of command current signal amplification circuit of phase A

8

TP10

Output of command current error amplification circuit of phase A

9

TP11

Positive output of driving current of phase A (PHASE_A_POS)

Principle Description

3.1.5 Principle of Keyboard Board

3.1.5.1 General Description

The control panel of 2118 implements the following functions:

Input from buttons: input by general button, combination button, repeat button and encoder are supported;

Backlight LED of buttons, control of status indicating LEDs

Control of beeps of buttons; larger adjustable range of volume; more than 3 grades are provided;

TGC input, full-scale and 0 available

Input from encoder

Input from optical trackball; control of backlight of optical trackball

3.1.5.2 Block Diagram of Structure

The block diagram of control panel is shown in below:

3-56

Principle Description

NIOS

CPU

NIOS software

NIOS system

FPGA

SDRA

M

USB

IC

Key scanning

LED drive

Encoder &

trackball interface

TGC IN

Audio OUT

To the port of

main board

TGC board

New/old trackball

Main board

Control panel

GND

L0

L1

L2

R0 R1 R2

R

74LS0

7

74HC14

F P G A

Fig 3-17 Block Diagram of the Control Panel

3.1.5.3 Scanning Circuit of Buttons

The keyboard array is controlled by row-and-column controlling method. FPGA outputs tests signals line-by-line. When a key is pressed, the corresponding row and line signals shall be consistent. According to the numbers of the row and line, the position of the key pressed can be defined.

Fig 3-18 Principle Diagram of Key Scanning

3.1.5.4 Driving of LED

Constant-current source driving dedicated chip is adopted to drive the LEDs.

3-57

Principle Description

Fig 3-19 Connection of LED Driving Circuit

There are 16 constant-current sources for each TLC5922, and the brightness can be adjusted respectively.SPI interface control is adopted for TLC5922, and plural chips can be connected in series for control. The power supply voltage is 5V.

3.1.5.5 Processing of Signals from Trackball

A newly designed optical trackball and a mechanical trackball are supported by 2118. The advantages of the new trackball are:

 Higher resolution and performance;

 Full color backlight;

 Optical device, no need for daily clean;

 Larger in size;

 Digital interface, more flexible in control;

The data returned from the trackball interface is square waveform data. There are a pair of signal cables in X and Y directions respectively, and four signal cables in all. The trackball is powered by 5V, supplied by the control panel.

The basic scheme of the optical trackball is shown below. It consists of trackball IC and backlight LED.

Fig 3-20 Basic Scheme of the Optical Trackball

3-58

Principle Description

74LS07

Control

logic

Piezoelectric

ceramic

piece

+5V

LM358

Potenti ometer

AD7908

ZR431

S

3.1.5.6 Buzzer

The speaker is piezoelectric ceramic. It is driven by 74LS07. The basic drive circuit is shown below:

Fig 3-21 Speaker Control Circuit

The piezoelectric ceramic has no positive / negative pole. As long as driving voltage with appropriate frequency is put to its two ends, it will make a sound with the same frequency as that of the driving voltage.

Whether it sounds or not, this is under the control of control logic. To generate sounds of different frequencies, just change the frequency of the driving circuit.

3.1.5.7 Encoder Circuit

There are two encoders on the control panel, and each encoder has two signal cables. The output signal is in the form of square waveform and the electrical level is 5V.

3.1.5.8 TGC Interface Circuit

TGC is actually a group of sliding rheostats, the output voltage of which is in linear relationship with its slider displacement. The output analog voltage is converted to digital signal by AD converter and sent to FPGA, thus obtaining the slider position.AD is powered by 3.3V, externally connected to

2.5V reference level. To keep good precision of the AD converter, the output of the sliding potentiometer is applied with LM358 for follow-up. The principle of the interface is shown in figure below.

Fig 3-22 TGC Interface Circuit

3-59

Principle Description

USB chip

U4

VBUS

DP

GND

DM

L8

U5

F P G A

3.1.5.9 FPGA and Peripheral Circuits

FPGA is the core of boards and cards, externally connected to SPI flash and SDRAM. Its logic and software codes are stored in SPI Flash, and they are loaded to FPGA and initiate the software when powered on.

NiosII soft core is a 32bit CPU. It can read and write SPI Flash on line and support on-line code upgrading.

FPGA, Flash and SDRAM are all 3.3V devices. The core voltage of FPGA is 1.2V.

3.1.5.10 USB Communication Interfaces

FPGA is externally connected with a USB interface chip U4 (3.3V device), supporting USB communication protocol 1.1. The frequency of external crystal oscillator X1 is 6MHz.USB interface is shown in figure below. In the figure, L8 is common mode suppression inductor, and U5 is anti-static chip.

Fig 3-23 Schematic of USB Port

3.1.5.11 Socket Definition

The components and sockets positions of the control panel are shown in the following figures. The socket definition is shown in Table 3-38.

3-60

Principle Description

Display switch

Encoder

Fig 3-24 Components Layout of the Control Panel Board (Frontal)

3-61

Principle Description

Socket number on PCB

Name

Definition of Pin

Notes

Pin No

Definition of Pin

Description of PIN

J1

JTAG debugging socket

1

TCK

TCK signal, pull-down

2

TDO

3

TMS

TMS signal, pull up

3.3V

4

TDI

TDI signal, pull up

3.3V

5

VDD

3.3V power

6 GND

System ground

J2

TGC socket

1

TGC VDD

3.3V power

Fig 3-25 Components Layout of the Control Panel Board (Bottom)

Table 3-38 Definition Table of Keyboard Board Socket

3-62

Principle Description

2

GND

System ground

3 ATGC0

Slide bar 0 output

4 ATGC1

Slide bar 1 output

5 ATGC2

Slide bar 2 output

6 ATGC3

Slide bar 3 output

7 ATGC4

Slide bar 4 output

8 ATGC5

Slide bar 5 output

9

ATGC6

Slide bar 6 output

10

ATGC7

Slide bar 7 output

J3

Main board connecting socket

3

DP

USB-DP

4

POWER_STB

Power status

Power connecting switch K93

5

DN

USB-DN

6

LCD_SW

Display position status

Connect display position switch S3

8

EDC_STATU S_G

EDC status

Connectio n indicator light D4

9

BATTERY_ST ATUS_O

Power status O

Connectio n indicator light D5

10

BATTERY_ST ATUS_G

Power status G

Connectio n indicator light D5

11

WORK_STAT US_O

Working status O

Connectio n indicator light D6-7

3-63

Principle Description

12

WORK_STAT US_G

Working status G

Connectio n indicator light D6-7

1,2,7,1 3~15,1

7~18，

23~26

GND

System ground

16

Audio Out

Keyboard board audio power amplification output

Reserved

19~22

+5

External input 5V

27~30

+3V3

External input 3.3V

J5

Mechanical trackball socket

1

GND

System ground

2 VCC

5V

3

TRACK_HBA LL2

Trackball signal 2

Signal 0 and 1 is a match; signal 2 and 3 is a match

4

TRACK_HBA LL3

Trackball signal 3

5

TRACK_HBA LL0

Trackball signal 0

6

TRACK_HBA LL1

Trackball signal 1

J4

Mechanical trackball socket

1，9，

11，13，

15

GND

System ground

2

VDD

3

MISO

Serial Data Output (Master In/Slave Out)

Output

4

MOSI

Serial Data Input( Master Out/Slave In)

Input

3-64

Principle Description

5

SCLK

Serial Clock Input

Input

6

NCS

Chip Select(Active Low Input)

Input

7

MOTION

Motion Detect （Active Low

Output）

Input 8

SHTDWN

Shutdown（Active

High Input）

Input 10

LED_DRIVER 1

LED driver 1

Input

12

LED_DRIVER 2

LED driver 2

Input

14

LED_DRIVER 3

LED driver 3

Input J8

Buzzer socket 1

BUZ0

Buzzer signal 0

2 BUZ1

Buzzer signal 1

Definition

1

VDD

2

VDD

3

GND

4

GND

5

RXE0-

6

RXE1-

7

RXE0+

8

RXE1+

9

GND

10

GND

11

RXE2-

12

RXEC-

3.1.6 Display Unit

The LCD interface consists of LVDS digital signal input interface and CCFL strip lamps interface; wherein LVDS signals are low-voltage difference digital signals, and VDD is 3.3V; the definition of its socket connecting to main board is shown as follows:

Table 3-39 Interfaces of Main Board and Speakers

3-65

Principle Description

Definition

13

RXE2+

14

RXEC+

15

GND

16

GND

17

RXE3-

18

GND

Definition

1

12V

2

12V

3

12V

4

ON/OFF

5

ADJ

6

GND

7

GND

8

GND

CCFL strip lamps are supplied with high voltage from the inverter, producing different brightness according to different currents. The principle of the inverter is:

The 12V input of the inverter comes from the main board. The main IC of the inverter drives 4 MOSFETs opening/closing alternatively and puts AC square wave to the primary winding the transformer. The high-voltage square wave induced by the secondary winding is transformed into sine wave through LC filtering and drives CCFL strip lamp shining. The switch signal controls the on/off of the strip lamp by controlling the enabling of main IC. The brightness signal adjusts the brightness of the strip lamp by controlling the duty cycle of square wave of main IC.

The inverter board is equipped with protection circuits of strip lamp open circuit, overvoltage and over-current. Protection of strip lamp: whenever any of the strip lamps is open circuit, the protection circuit will act; over-current protection: when the output current is over-current, the feedback signals from the strip lamp to main IC will restrain the duty ratio of the square wave to reduce the current for protection; overvoltage protection: the IC has been configured with the voltage-limiting function to ensure the output voltage is not too high. The socket J26 connecting to main board is defined as follows:

Table 3-40 Interfaces of Main Board and Inverter

3-66

Principle Description

Definition

1

VDD

2

GND

3

SCL

4

SDA

Wherein ON/OFF is the switch signal of the inverter; ADJ controls the brightness of the LCD by inputting different voltages which are then converted to currents by the inverter;

EEPROM board storages one-to-one related information of LCD (such as serial number and color temperature version, etc) and gamma correction parameters; the socket connecting to main board is defined as follows:

Table 3-41 Interfaces of Main Board and EEPROM

The logic will output different RGB mapping tables according to the storage contents to ensure the consistence of image output effect for different LCDs;

Note: To ensure the display effect, when changing LCD assembly or main board assembly,

enter Maintenance Menu to reload the LCD parameters. This is display parameter

synchronization. The synchronization procedure is described as follows:

1. Restart the Doppler system:

2. Log onto the system as service engineer:

3. Press <F10> to open the Setup menu, see the figure below:

Fig 3-26 Setup Menu

4. Click [Maintenance] in the menu to open the menu in the figure below:

3-67

Fig 3-27 Maintenance Menu

5. Click [Monitor Test] →[Main Monitor] to open the following screen:

Principle Description

Fig 3-28 Main Screen Maintenance Screen

6. See the figure above, click the top icon on the screen (update) to start the maintenance, when completed, a dialogue box showing successful maintenance will be displayed, restart the system to make the new setting take effect. If the maintenance is failed, please return the system to development center. The following two figures show the two situations respectively.

3-68

Fig 3-29 Successful Update

Principle Description

Fig 3-30 Update Failed

3.1.7 Principle of ECG Board

The function of the ECG board contains: ECG signal detection; ECG waveform display; ultrasound image reference signal; producing real-time 2-D image and color flow image synchronous signal; displaying ECG signals from external patient monitor.

After being amplified, filtered and sampled, the ECG signal is sent to host PC, and R-waveform detection is performed simultaneously. After being detected, the ECG trigger signal is sent to host PC via serial port. Block diagram is shown as follows:

3-69

Principle Description

Input

protect1

Cache

Differential

amplifier

Pace

suppre

ssion

High-

pass

filter1

Low-pass

amplfier1

Footswitch

interface

Lead

drop

check

Cache

Amplitude

offset

adjust 1

DC IN

Lead 1

Lead 2

MCU

A D

Right leg

drive

Lead 3

Check signal 1

Check signal 2

DC_OUT

ECG

Power

2118

RS232

+12

Switch

power

＋6D

－6

＋6

＋3V3REF＋5V

＋3V3

－5V

UC3843

Transformer

MIC5205 LM4120

SPX5205-3.3

MIC5270-5BM5

SVCC

3.3V

+5

SPX5205-3.3

MIC2171

Fig 3-31 Block Diagram of the ECG Board

3.1.7.1 Power Principle of ECG Board

ECG board is powered by main unit, and the voltage is 5V. 5V is transformed to 12V after going through the step-up circuit. T1 is the isolated transformer. The 12V power is isolated and then sent to ECG board to power the analog and digital circuits. As shown in figure below.

Fig 3-32 Power Functional Block Diagram of ECG Board

3.1.7.2 Instrumentation Diagram and Component Description

The instrumentation diagram of ECG board is shown in the following figure. The figure marks the sockets and their names. The blue dotted line indicates the component isolation boundary. The right isolation area indicates the power circuit and communication port, and the left isolation area indicates ECG signal processing circuit

3-70

Mindray M7 Series Diagnostic Ultrasound System Service Manual M7 Series Diagnostic Ultrasound System Service Manual Revision 15.0

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Revision History

Intellectual Property Statement

Responsibility on the Manufacturer Party

Warranty

This warranty shall not extend to:

Customer Service Department

Important Information

Safety Precautions

1. Meaning of Signal Words

2. Meaning of Safety Symbols

3. Safety Precautions

4. Warning Labels

5. Symbol Explanation

1 System Overview

1.1 Intended Use

1.2 Contraindication

1.3 Product and Model Code

2 System Structure

2.1 Introduction of Each Unit

2.2 Peripherals Supported

2.3 Extend Modules

2.3.1 Transducer Extend Module

2.3.2 I/O Extend Module.

2.3.3 V/A Extend Module

2.3.4 ECG Module

2.4 Control Panel

3 Principle Description

3.1 Electric Principle of the System

3.1.1 Power System

3.1.1.1 Basic Functions of Power System

3.1.1.2 Basic Principle of Power System

3.1.1.3 3V3STB Circuit Unit

Basic Principle of 3V3STB Circuit

The Maintenance Points of 3V3STB Circuit

3.1.1.4 5VSTB_CPU Circuit Unit

Basic Principle of 5VSTB_CPU Circuit

The Maintenance Points of 5VSTB_CPU Circuit

3.1.1.5 +12V Circuit Unit

Basic Principle of +12V

The Maintenance Points of +12V

3.1.1.6 PHV Circuit Unit

Basic Principle of PHV

The Maintenance Points of PHVP PW Circuit Unit

The Maintenance Points of PHVN PW Circuit Unit

The Maintenance Points of PHV CW Circuit Unit

3.1.1.7 +5V Circuit Unit

Basic Principle of +5V Circuit

The Maintenance Points of +5V Circuit

3.1.1.8 +1.5V Circuit Unit

Basic Principle of +1.5V Circuit

The Maintenance Points of +1.5V Circuit Unit

3.1.1.9 +3.6V/3.3V/2.8V/1.8V Circuit Unit

Basic Principle of +3.6V/3.3V/2.8V/1.8V Circuit

The Maintenance Points of +3.6V/3.3V/2.8V/1.8V Circuit Unit

3.1.1.10 -5V and -12V Circuit Unit

Basic Principle of -5V and -12V

The Maintenance Points of -5V and -12V Circuits

3.1.1.11 Charging Unit

Basic Principle of Charging Unit

The Maintenance Points of Charging Unit

Basic Principle of ±95V Circuit

The Maintenance Points of ±95V Circuit

3.1.2 Principle of the Main Board

3.1.2.1 Power Distribution

3.1.2.2 Ultrasound Receiving

3.1.2.3 Clock Circuit

3.1.2.4 Signal Processing

3.1.2.5 Power Management

3.1.2.6 System Monitoring

3.1.2.7 Video Processing

The first version:

The second version:

3.1.2.8 Interfaces of Main Board

Interfaces of Main Board and Transducer Board

Interfaces of Main Board and Transmission Board