Mindray BeneView T8 Service Manual

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BeneView T8

Patient Monitor

Service Manual

Intellectual Property Statement

SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called

Mindray) owns the intellectual property rights to this product and this manual. This manual

may refer to information protected by copyrights or patents and does not convey any license

under the patent rights of Mindray, nor the rights of others. Mindray does not assume any

liability arising out of any infringements of patents or other rights of third parties.

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,

rent, adaption and translation of this manual in any manner whatsoever without the written

permission of Mindray is strictly forbidden.

, and are the registered trademarks or trademarks owned

by Mindray in China and other countries. All other trademarks that appear in this manual are

used only for editorial purposes without the intention of improperly using them. They are the

property of their respective owners.

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

FOR YOUR NOTES

Preface

Manual Purpose

This manual provides detailed information about the assembling, dissembling, testing and

troubleshooting of the equipment to support effective troubleshooting and repair. It is not

intended to be a comprehensive, in-depth explanation of the product architecture or technical

implementation. Observance of the manual is a prerequisite for proper equipment

maintenance and prevents equipment damage and personnel injury.

This manual is based on the maximum configuration; Therefore, some contents may not

apply to your monitor. If you have any question, please contact our Customer Service

Department.

Intended Audience

This manual is for biomedical engineers, authorized technicians or service representatives

responsible for troubleshooting, repairing and maintaining the patient monitors.

Revision History

This manual has a revision number. This revision number changes whenever the manual is

updated due to software or technical specification change. Contents of this manual are subject

to change without prior notice.

 Revision number: 1.0  Release time: October 2006

III

Abbreviations

Abbreviations used in this manual are:

MPM multi-parameter module

SMR satellite module rack

CMS central monitoring system

PCB printed circuit board

Passwords

A password may be required to access different modes within the monitor. The passwords are

listed below:

 User maintenance: 888888  Factory maintenance: 332888  Demo mode: 2088

Contents

1 Safety................................................................................................................................. 1-1

1.1 Safety Information ..........................................................................................................1-1

1.1.1 DANGER ........................................................................................................... 1-2

1.1.2 Warnings............................................................................................................. 1-2

1.1.3 Cautions ............................................................................................................. 1-2

1.1.4 Notes .................................................................................................................. 1-3

1.2 Equipment Symbols ........................................................................................................ 1-3

2 Theory of Operation ........................................................................................................ 2-1

2.1 Introduction..................................................................................................................... 2-1

2.2 System Connections........................................................................................................ 2-2

2.2.1 Mounting the Patient Monitor............................................................................ 2-2

2.2.2 Connectors for Peripheral Devices..................................................................... 2-3

2.3 Main Unit ........................................................................................................................ 2-4

2.3.1 Input System ...................................................................................................... 2-5

2.3.2 Output System.................................................................................................... 2-6

2.3.3 Processing and Communications System........................................................... 2-7

2.3.4 Power Management System............................................................................... 2-9

2.3.5 Equipment Interface System ............................................................................ 2-12

2.4 Parameter Module ......................................................................................................... 2-14

2.4.1 Module Communication Board........................................................................ 2-14

2.4.2 Module Power Board ....................................................................................... 2-14

2.4.3 Parameter Board............................................................................................... 2-14

2.5 Satellite Module Rack................................................................................................... 2-15

3 Testing and Maintenance................................................................................................. 3-1

3.1 Introduction..................................................................................................................... 3-1

3.1.1 Test Report ......................................................................................................... 3-2

3.1.2 Recommended Frequency.................................................................................. 3-2

3.2 Visual Test....................................................................................................................... 3-3

3.3 Power On Test ................................................................................................................. 3-4

3.4 Module Performance Tests .............................................................................................. 3-4

3.4.1 Mainstream CO

3.4.2 Sidestream and Microstream CO

3.4.3 ECG Tests........................................................................................................... 3-6

3.4.4 Resp Performance Test....................................................................................... 3-7

3.4.5 NIBP Tests.......................................................................................................... 3-8

3.4.6 IBP Tests............................................................................................................3-11

Tests........................................................................................ 3-4

Module Test ................................................. 3-5

Contents

3.4.7 SpO2 Test.......................................................................................................... 3-13

3.4.8 C.O. Test........................................................................................................... 3-13

3.4.9 Temp Test......................................................................................................... 3-13

3.4.10 BIS Test.......................................................................................................... 3-14

3.4.11 RM Test .......................................................................................................... 3-14

3.4.12 ICG Test ......................................................................................................... 3-15

3.4.13 AG Tests......................................................................................................... 3-15

3.5 Nurse Call Relay Performance Test .............................................................................. 3-18

3.6 Analog Output Performance Test .................................................................................. 3-18

3.7 Electrical Safety Tests ................................................................................................... 3-19

3.7.1 Enclosure Leakage Current Test....................................................................... 3-20

3.7.2 Earth Leakage Current Test.............................................................................. 3-20

3.7.3 Patient Leakage Current Test ........................................................................... 3-21

3.7.4 Patient Auxiliary Leakage Current Test ........................................................... 3-21

3.8 Touchscreen Calibration................................................................................................ 3-22

3.9 Recorder Check............................................................................................................. 3-22

3.10 Factory Maintenance................................................................................................... 3-23

3.10.1 Accessing Factory Maintenance Menu........................................................... 3-23

3.10.2 Drawing Waves .............................................................................................. 3-23

3.10.3 Recorder ......................................................................................................... 3-23

3.10.4 Software Version ............................................................................................ 3-24

3.10.5 Monitor Information....................................................................................... 3-24

3.10.6 Calibrate NIBP............................................................................................... 3-24

3.11 Program Upgrade ........................................................................................................ 3-25

4 Troubleshooting................................................................................................................ 4-1

4.1 Introduction..................................................................................................................... 4-1

4.2 Part Replacement ............................................................................................................4-1

4.3 Patient Monitor Status Check.......................................................................................... 4-1

4.4 Software Version Check .................................................................................................. 4-2

4.5 Technical Alarm Check ................................................................................................... 4-2

4.6 Troubleshooting Guide.................................................................................................... 4-2

4.6.1 Power On/Off Failures ....................................................................................... 4-2

4.6.2 Display Failures ................................................................................................. 4-3

4.6.3 Module Rack Failures ........................................................................................ 4-4

4.6.4 Alarm Problems.................................................................................................. 4-6

4.6.5 Button and Knob Failures .................................................................................. 4-7

4.6.6 Recorder Failures ............................................................................................... 4-7

4.6.7 Interface Failures................................................................................................ 4-8

4.6.8 CF Card Problems.............................................................................................. 4-9

4.6.9 Power Supply Failures ....................................................................................... 4-9

4.6.10 Network Related Problems..............................................................................4-11

4.6.11 Software Upgrade Problems........................................................................... 4-12

Contents

5 Repair and Disassembly ..................................................................................................5-1

5.1 Tools................................................................................................................................ 5-1

5.2 Preparations for Disassembly.......................................................................................... 5-1

5.3 Basic Disassembly .......................................................................................................... 5-2

5.3.1 Disconnecting the Base ...................................................................................... 5-2

5.3.2 Separating the Front and Rear Half of the Monitor............................................ 5-4

5.4 Further Disassembly........................................................................................................ 5-6

5.4.1 Removing the Power Switch & LED Board ...................................................... 5-6

5.4.2 Disconnecting the Knob Encoder....................................................................... 5-7

5.4.3 Removing the Button Board............................................................................... 5-7

5.4.4 Removing the LCD Assembly............................................................................ 5-8

5.4.5 Removing the Alarm Lamp Board ....................................................................5-11

5.4.6 Removing the Main Board ............................................................................... 5-12

5.4.7 Removing the CF/WLAN Assembly................................................................ 5-13

5.4.8 Removing the Fan ............................................................................................ 5-15

5.4.9 Removing the Speaker ..................................................................................... 5-15

5.4.10 Removing the Interface Board Assembly....................................................... 5-16

5.4.11 Removing the Power Supply Assembly ......................................................... 5-17

5.4.12 Removing the Integral Module Rack ............................................................. 5-20

5.4.13 Removing the Recorder.................................................................................. 5-23

5.5 Removing the SMR Assembly ...................................................................................... 5-29

5.6 Disassembling Modules ................................................................................................ 5-33

5.6.1 Disassembling the ICG Module ....................................................................... 5-33

5.6.2 Disassembling CO

Module ............................................................................. 5-36

6 Parts .................................................................................................................................. 6-1

6.1 Introduction..................................................................................................................... 6-1

6.2 Main Unit ........................................................................................................................ 6-2

6.2.1 Exploded View ................................................................................................... 6-2

6.2.2 Parts List ............................................................................................................ 6-2

6.3 Base Assembly ................................................................................................................ 6-3

6.3.1 Exploded View ................................................................................................... 6-3

6.3.2 Parts List ............................................................................................................ 6-3

6.4 Front housing Assembly.................................................................................................. 6-4

6.4.1 17” LCD with Anti-glare Screen ........................................................................ 6-4

6.4.2 17” LCD Touchscreen........................................................................................ 6-6

6.5 Rear Housing Assembly.................................................................................................. 6-8

6.5.1 Rear Housing Assembly..................................................................................... 6-8

6.5.2 Power module..................................................................................................... 6-9

6.5.3 Integral Module Rack....................................................................................... 6-10

6.5.4 Interface Board Assembly .................................................................................6-11

6.5.5 Main Support Assembly................................................................................... 6-12

6.5.6 Others ............................................................................................................... 6-13

6.6 SMR Assembly ............................................................................................................. 6-14

Contents

6.6.1 SMR Assembly................................................................................................. 6-14

6.6.2 SMR Inside Assembly...................................................................................... 6-15

6.7 Parameter Modules........................................................................................................ 6-17

6.7.1 MPM Module................................................................................................... 6-17

6.7.2 C.O. Module..................................................................................................... 6-18

6.7.3 RM Module ...................................................................................................... 6-20

6.7.4 ICG Module ..................................................................................................... 6-21

6.7.5 AG Module....................................................................................................... 6-23

6.7.6 BIS Module ...................................................................................................... 6-24

6.7.7 IBP Module ...................................................................................................... 6-25

6.7.8 Mindray CO2 Module ...................................................................................... 6-27

6.7.9 Oridion CO2 Module ....................................................................................... 6-28

6.8 Replaceable Parts .......................................................................................................... 6-29

6.8.1 Main Unit ......................................................................................................... 6-29

6.8.2 SMR ................................................................................................................. 6-31

6.8.3 Parameter Modules........................................................................................... 6-31

6.8.4 Cables............................................................................................................... 6-32

1 Safety

1.1 Safety Information

DANGER

z Indicates an imminent hazard that, if not avoided, will result in death or serious

injury.

WARNING

z Indicates a potential hazard or unsafe practice that, if not avoided, could result in

death or serious injury.

CAUTION

z Indicates a potential hazard or unsafe practice that, if not avoided, could result in

minor personal injury or product/property damage.

NOTE

z Provides application tips or other useful information to ensure that you get the

most from your product.

1-1

Safety

1.1.1 DANGER

There are no dangers that refer to the product in general. Specific “Danger” statements may

be given in the respective sections of this manual.

1.1.2 Warnings

WARNING

z All installation operations, expansions, changes, modifications and repairs of this

product are conducted by Mindray authorized personnel.

z There is high voltage inside the equipment. Never disassemble the equipment

before it is disconnected from the AC power source.

z When you disassemble/reassemble a parameter module, a patient leakage current

test must be performed before it is used again for monitoring.

z The equipment must be connected to a properly installed power outlet with

protective earth contacts only. If the installation does not provide for a protective earth conductor, disconnect it from the power line and operate it on battery power, if possible.

z Dispose of the package material, observing the applicable waste control regulations

and keeping it out of children’s reach.

1.1.3 Cautions

CAUTION

z Make sure that no electromagnetic radiation interferes with the performance of the

equipment when preparing to carry out performance tests. Mobile phone, X-ray equipment or MRI devices are a possible source of interference as they may emit higher levels of electromagnetic radiation.

z Before connecting the equipment to the power line, check that the voltage and

frequency ratings of the power line are the same as those indicated on the equipment’s label or in this manual.

z Protect the equipment from damage caused by drop, impact, strong vibration or

other mechanical force during servicing.

1-2

Safety

1.1.4 Notes

NOTE

z Refer to Operation Manual for detailed operation and other information.

1.2 Equipment Symbols

Attention: Consult

accompanying documents

(this manual).

CIS connector

Danger: High-voltage

Alternating current(AC)

Power ON/OFF

Battery indication

Zero key

Calibrate key

Measure/Standby

Check sensor

ESD warning symbol for Electrostatic sensitive devices.

Network connector

Defibrillator connector

Connector for satellite

module rack

Video output

Auxiliary output connector

USB connector

Equipotential terminal

CE marking

Type CF applied part. Defibrillator-proof protection against electric shock.

Type BF applied part. Defibrillator-proof protection against electric shock.

1-3

FOR YOUR NOTES

Safety

1-4

2 Theory of Operation

2.1 Introduction

This patient monitor is designed to monitor a fixed set of physiological parameters including

ECG, heart rate (HR), respiration (Resp), temperature (Temp), SpO

non-invasive blood pressure (NIBP), invasive blood pressure (IBP), cardiac output (C.O.),

carbon dioxide (CO

bispectral index (BIS) and respiration mechanics (RM) of single adult, pediatric and neonatal

patients.

), oxygen (O2), anesthetic gas (AG), impedance cardiograph (ICG),

, pulse rate (PR),

The patient monitor also:

 Provides audible and visual alarm indications in case of patient or equipment problems.  Enables displaying, reviewing, storing and transferring of real-time data.  Incorporates multiple input devices such as buttons, knob, touchscreen, keyboard and

mouse.

 Interfaces a clinical information system or central monitoring system.  Enables program upgrade over the network.

2-1

Theory of Operation

2.2 System Connections

2.2.1 Mounting the Patient Monitor

The patient monitor can be mounted on a wall bracket or on a trolley support. The wall

bracket or trolley support can be ordered optionally. Each type of mounting bracket is

delivered with a complete set of mounting hardware and instructions. Refer to the

documentation delivered with the mounting hardware for instructions on assembling mounts.

CAUTION

z Use mounting brackets we supply or approve. If other compatible mounting

bracket is used, be sure it can be safely used on the patient monitor.

z The mounting bracket should be installed by our qualified service personnel, or

engineers who have adequate knowledge on it.

z If other mounting solution is used, the installation personnel and the customer

should verify if it can be safely used on the patient monitor, and the customer assume the responsibility for any risk resulting from that.

2-2

Theory of Operation

2.2.2 Connectors for Peripheral Devices

On the back of the patient monitor you will find all connectors for peripheral devices.

1. AC Power Connector: used to connect an AC power source (100 to 240 VAC, 50/60Hz).

2. Equipotential Terminal: used to connect the equipotential terminal of other equipment,

eliminating potential difference between different pieces of equipment.

3. SMR Connector: It outputs a 12V DC, used to connect the SMR.

5678

4. Video Output: It is a DVI-D connector used to connect a secondary display.

5. CIS Connector: It is a RJ45 connector used to connect a CIS.

6. Network Connector: It is a RJ45 connector used to connect an ethernet network or a PC.

7. Defibrillator Connector: It is a RJ11 connector used to connect a defibrillator.

8. Auxi Output Connector: It is a BNC connector used to output analog signals and nurse

call signals.

9. Secondary USB Connector: used to connect the mouse and keyboard of the secondary

display.

10. General USB Connector: used to connect any USB-compatible peripheral device.

2-3

Theory of Operation

2.3 Main Unit

The patient monitor consists of:

 Input system: button board, knob, touchscreen, power switch and LED board  Output system: LCD panel, alarm LED board, recorder, speaker  Processing and communications system: main board, CIS assembly, integral module

rack

 Power management system: battery, battery interface board, power module  Equipment interface system: USB interface board, DVI interface board and CF/WLAN

assembly.

Additionally, the patient monitor can also connect a satellite module rack (SMR), parameter

modules, mouse, keyboard, etc.

The following diagram illustrates the structure of the patient monitor.

2-4

Theory of Operation

2.3.1 Input System

Button board

The button board, located at the lower part of the monitor’s front panel, contains 6 keys and

provides connections for the following components to the main board:

 Knob  Power switch & LED board  Touchscreen control board  Backlight board  Alarm LED board

The following diagram shows the button board connections.

Knob

The knob can be pressed, or rotated both clockwise and counter-clockwise. It is connected

with the button board.

Touchscreen

The touchscreen enables touch operations and can be calibrated. It is connected with the

touchscreen control board and main board.

Power switch & LED Board

The power switch & LED board controls the power supply for the main unit. It has three

LEDs, which respectively indicate the AC power status, battery status and monitor power

on/off status. It is connected with the button board.

2-5

Theory of Operation

2.3.2 Output System

LCD panel

The patient monitor adopts a high-resolution LCD panel. The LCD panel is connected with

the backlight board and the main board. It runs on power from a DC source, which originally

comes from the main board, and then goes to the backlight board through the button board,

and finally is delivered to the LCD panel by the backlight board.

Alarm Lamp

The patient monitor has two alarm lamps: physiological alarm lamp and technical alarm lamp.

The alarm LED board converts electric signals into visual signals and then sends the visual

signals to the front panel through the light guiding post. Physiological alarm lamp lights

either red or yellow whereas technical alarm lamp lights blue only.

Recorder

The recorder receives data coming form the main board and then sends them to the thermal

printhead for printing. The recorder has a hardkey (starting/stopping recordings) and a green

LED on its front. It is connected with the main board.

The following diagram shows its operating principle.

2-6

Theory of Operation

Module Description

Power interface Introduces a DC from the main board.

Power module

CPU Control the communications between modules.

Signal interfac

Motor drive circuit

Button board &

indicator interface

FPC interface

Converts the input power into voltages that fit each module and then

forwards them to each module.

Control the communications between the main board and the

recorder CPU.

Receives the control signals from the CPU and then forwards them to

the step engine.s

Sends key commands to the CPU and receive commands controlling

the indicators from the CPU.

Sends the thermal printhead information to the CPU and receives the

commands controlling the thermal printhead from the CPU.

Speaker

The speaker provides sound for alarms, key strokes, heart beats and pulse, and allows PITCH

TONE and multi-level tone modulation. It is connected with the main board and runs power

from a DC provided by the main board.

2.3.3 Processing and Communications System

Main Board

The main board is the heart of the patient monitor. It implements a series of tasks including

input & output control, data storage and processing, display processing, system control,

communication management, printing management and alarming, etc.

The main board comprises the CPU board and mother board. The following diagram shows

interfaces to other components.

2-7

Theory of Operation

The CPU board is an essential CPU system containing the CPU, FLASH, memory, realtime

clock, EEPROM, etc. It interfaces to the mother board only, which then provides interfaces to

all other external devices.

The mother board is in charge of connections and communications with other components

and provides the following interfaces:

 LCD port: connects a built-in display.  Video output+network+ GPIO: connects the digital video interface board.  USB×2+RS422: connects the USB interface board.  Button board port: connects the button board.  Integral module rack port: connects integral module rack communication board.  Fan port: connects the fan.  Speaker port: connects the speaker.  Power module port: connects the power module.  CIS port: located at the back of the mother board for connecting the CIS components.  WLAN&CF port: connects the CF/ WLAN assembly.  Recorder port: connects the recorder.

2-8

Theory of Operation

Integral Module Rack

The patient monitor has two kinds of integral module rack: 2-slot and 5-slot. The integral

module rack consists of control board and communication board.

The control board is a NIOS II module located on the communication board. It implements

protocol conversion and infrared communication between the main unit and the parameter

modules.

The communication board can be a MPM type (2-slot type) or a 3-slot type. It consists of

infrared circuit, RS422 communication circuit and power circuit. The communication board

is connected with the main board.

Operating principle of the communication board is as follows:

 The infrared circuit transmits and receives infrared signals, and controls signal intensity;  RS422 communication circuit implements signal conversion between serial signals and

RS422 signals;

 Power circuit transfers 3.3VDC power supply to run the integral module rack and

12VDC power supply to run the parameter modules from the mother board.

2.3.4 Power Management System

Battery

The patient monitor uses two chargeable lithium-ion batteries (11.1 V, 4500 mAh). The

battery compartment door is located at the bottom of the patient monitor. The battery power

is introduced to the power module via the battery interface board, and then processed and

distributed to each component by the power module.

NOTE

z Two batteries must be used simultaneously when the patient monitor operates on

battery power. Otherwise, it may cause power supply protection.

Battery Interface Board

The battery interface board connects batteries to the power module, enabling charging and

discharging between the batteries and the power board.

2-9

Theory of Operation

Power Module

The power module is located at the back of the patient monitor. The main part of the power

module is the power board, which contains 4 PCBs: charging & power management board,

voltage drop DC inverter, voltage rise and drop DC inverter, and voltage drop 5 V CIS power

board.

The power module transforms the input power into DC and then forwards them to each

component of the patient monitor. The input power comes from either the batteries or an AC

source. The patient monitor will run power from the AC source whenever an AC source is

available. If the AC source becomes unavailable, the patient monitor will automatically

switch to the battery power. This does not affect the monitor’s operating status.

Power module has an AC input socket at its backside, and a socket at its front provides 4

connections to the batteries, main board, CIS components and USB interface board

respectively. The power module protects itself and the patient monitor by switching off AC

input or DC output in case of overcurrent, short circuit and overvoltage.The power module

provides 4 DC outputs:

Outputs Description

+3.3 V

+5.0 V

+5.0 V CIS Goes to the CIS assembly.

+12 V

The systematic principle diagram of the power module is as follows:

Goes to the mother board, CPU board, DVI interface board and integral

module rack.

Goes to the DVI interface board, recorder, CF storage card board and

USB interface board.

Goes to the recorder, LCD panel, integral module rack, parameter

modules and USB interface board.

2-10

Theory of Operation

The following diagram shows the pins of the power module socket (excluding the pins of the

battery power socket. On power board, pin 1 has a triangle symbol):

Pin ID Marking Description Cable

color

2, 4, 6, 7,

13, 15, 17

8 RXD Receives serial communications (the main board sends). Purple

9 TXD Sends serial communications (the main board receives). Brown

10 PCON

11 LCD-EN

12, 1 12 V

14, 3 5 V CIS

GND The output grounding terminal of the power board. Black

Power on/off control signal. It is a TTL pulse signal

inputted from the back board. Every time when the power

on/off switch is pressed (pulse of falling edge), a switch

between power “on” and “off” happens. The pulse

duration is no less than 0.1 s for power-on and no less

than 2 s for power off.

Backlight on/off control signal. The main board sends a

backlight on/off control signal to the power board through

the serial interface. The power board processes the

received signal and then outputs a high or low level

depending on the received signal.

The positive end of the 12 V DC coming from the power

board.

The positive end of the 5 V CIS coming from the power

board.

Blue

Green

Yellow

Purple

16, 5 5 V

18, 19 3.3 V

20 LED- AC AC power status indication signal White

21 LED- BAT Battery status indication signal. Grey

22 LCD-BR Backlight brightness control voltage. Brown

The positive end of the 5 V DC coming from the power

board.

The positive end of the 3.3 V DC coming from the power

board.

2-11

Red

Orange

Theory of Operation

2.3.5 Equipment Interface System

USB Interface Board

The USB interface board is compatible with such USB interfaces as USB2.0, USB1.1 and

USB1.0. It is connected with the main board and the power module. It receives 2 USB

differential signals coming from the main board and then distributes them to 10 USB

interfaces via 2 ISP1521 chips. Moreover, it provides RS232 and RS422 interfaces for

communication between the main board and the SMR. The USB interface board receives 5

VDC and 12 VDC inputs from the power module, of which the 5 VDC goes to the USB

interface board and the 12 VDC outputted to the SMR connector through a fuse.

2-12

Theory of Operation

DVI Interface Board

The DVI interface board is connected with the mother board and the CIS mother board. The

following diagram shows its interfaces to other components.

Interface Description

CIS Connector Connects the CIS mother board.

BNC connector Outputs analog signals and nurse call signals.

RJ 11 connector Outputs defibrillator synchronization signals.

RJ 45 connector

(network)

RJ 45 connector

(CIS)

DVI-D connector Connects a secondary display.

It is a standard RJ45 connector, providing 10/100 BASE-TX Ethernet

communications channels. It connects an Ethernet network or a PC.

It is a standard RJ45 connector for connecting a CIS network.

WLAN&CF assembly

The CF assembly serves the non-volatile CF storage card which is used for data storage and

transfer. It is connected with the mother board.

2-13

Theory of Operation

2.4 Parameter Module

Each parameter module consists of the module communication board, module power board,

module button board, parameter board, etc.

2.4.1 Module Communication Board

The module communication board allows a short delay when powering up the module and

adopts FPGA to enable infrared communications between the module and the module rack. It

has no electrical connections and is therefore isolated physically. It has an ID, which will be

send to the module rack according to the pre-defined baud rate when a module is plug into

the module rack.

2.4.2 Module Power Board

Some modules have no power board. There are two kinds of module power board:

1. Isolated power board: converts the 12 V DC into a 12 V isolated DC and a 5 V isolated

DC.

2. Non-isolated power board: converts the 12 V DC into a 5 V DC.

2.4.3 Parameter Board

The parameter board is a parameter measurement component, which is the most important

component of the parameter module.

2-14

Theory of Operation

2.5 Satellite Module Rack

The satellite module rack (SMR) is independent of the patient monitor, provides 8 slots for

mounting parameter modules. It has the following features:

 It allows a parameter module to be plugged and unplugged with the patient monitor on.

This allows function extension and patient transfer.

 It does not have its own power. It introduces 12 V DC from the patient monitor and then

supplies power to each parameter module via the contact screw.

 It accomplishes communications protocol conversions between the patient monitor and

each parameter module, provides infrared communications for parameter modules, and

is responsible for detecting infrared communications malfunction for each parameter

module.

The following diagram shows the structure of the SMR.

2-15

FOR YOUR NOTES

Theory of Operation

2-16

3 Testing and Maintenance

3.1 Introduction

To ensure the patient monitor always functions normally, qualified service personnel should

perform regular inspection, maintenance and test. This chapter provides a checklist of the

testing procedures for the patient monitor with recommended test equipment and frequency.

The service personnel should perform the testing and maintenance procedures as required and

use appropriate test equipment.

The testing procedures provided in this chapter are intended to verify that the patient monitor

meets the performance specifications. If the patient monitor or a module fails to perform as

specified in any test, repairs or replacement must be done to correct the problem. If the

problem persists, contact our Customer Service Department.

CAUTION

z All tests should be performed by qualified service personnel only. z Care should be taken to change the settings in [User Maintenance] and [Factory

Maintenance] menus to avoid loss of data.

z Service personnel should acquaint themselves with the test tools and make sure

that test tools and cables are applicable.

3-1

Testing and Maintenance

3.1.1 Test Report

After completing the tests, service personnel are required to record test results in this table

and report them to Mindray Customer Service Department.

Test Equipment

Name Model/PN Expiry Date

Test Record

No. Test Item Test Site Test Results

Conclusion

Pass/Fail: Tested by: Date:

3.1.2 Recommended Frequency

Check/Maintenance Item Frequency

Visual test 1. When first installed or reinstalled.

Power on test 1. When first installed or reinstalled.

2. Following any maintenance or the replacement of any

main unit parts.

Mainstream

test

Microstream

tests

Leakage test Sidestream and

Calibration

1. If user suspects that the measurement is incorrect.

2. Following any repairs or replacement of respective

module.

3. At least once every two years.

Resp test /

NIBP tests

Performance test ECG tests

Calibration

Accuracy test

Leakage test

Calibration

3-2

SpO2 test /

C.O. test /

Temp test /

BIS test /

RM test /

ICG test /

Testing and Maintenance

Performance test IBP tests

Pressure calibration

Nurse call relay

performance test

Analog output

performance test

Electrical safety

tests

Touchscreen

calibration

Performance test AG tests

Calibration

Enclosure leakage

current test

Earth leakage

current test

Patient leakage

current test

Patient auxiliary

current test

/ 1. When the touchscreen appears abnormal.

1. If user suspects that the measurement is incorrect.

2. Following any repairs or replacement of AG module.

3. At least once every year

If user suspects that the nurse call or analog output does

not work well.

1. Following any repair or replacement of the power

module.

2. At least once every two years.

2. After the touchscreen is replaced.

Recorder check / Following any repair or replacement of the recorder.

3.2 Visual Test

Inspect the equipment for obvious signs of damage. The test is passed if the equipment has no

obvious signs of damage. Follow these guidelines when inspecting the equipment:

 Carefully inspect the case, the display screen and the buttons for physical damage to  Inspect the SMR and parameter modules for mechanical damage.  Inspect all external connections for loose connectors, bent pins or frayed cables.  Inspect all connectors on the equipment for loose connectors or bent pins.  Make sure that safety labels and data plates on the equipment are clearly legible.

3-3

Testing and Maintenance

3.3 Power On Test

This test is to verify that the patient monitor can power up correctly. The test is passed if the

patient monitor starts up by following this procedure:

1. Insert two batteries in the battery chamber and connect the patient monitor to the AC

mains, the AC mains LED and battery LED light.

2. Press the power on/off switch to switch on the patient monitor. The operating status

LED lights up, and the technical and physiological alarm lamps light blue and red

respectively.

3. After the start-up screens are displayed, the system sounds a beep indicating the self test

on alarm sounds is passed. At the same time, the technical alarm lamp turns yellow, and

then turns off together with the physiological alarm lamp. This indicates that the self test

on alarm lamps is passed.

4. The patient monitor enters the main screen and start-up is finished.

3.4 Module Performance Tests

3.4.1 Mainstream CO2 Tests

Follow this procedure to perform the test:

1. Connect the mainstream CO

rack.

2. Enter the [CO2 Setup] menu to set [Operating Mode] to [Measure]. Wait for CO

module warmup.

3. Select [Start Zero Cal.] in the [CO2 Setup] menu. If zero calibration fails, the prompt information [CO2 Zero Failed] is displayed. If it passes, the baseline of waveform

returns to zero.

4. Set [Apnea Time] to 10 s in the [Adjust CO2 Limits] menu.

5. Blow to the CO

alarm message [CO2 Apnea] is displayed on the screen.

sensor to generate a CO2 waveform. Hold the sensor for 10 s and the

module with the sensor and plug the module in the module

6. Disconnect the CO

displayed.

sensor, verify that prompt information [CO2 Comm Stop] is

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Testing and Maintenance

3.4.2 Sidestream and Microstream CO2 Module Test

Leakage test

Follow this procedure to perform the test:

1. Plug the module in the module rack.

2. Enter the [CO2 Setup] menu to set [Operating Mode] to [Measure]. Wait for CO

module warmup.

3. Block the gas inlet completely.

 Sidestream: Check that alarm message [CO2 FilterLine Err] is displayed on the

screen in 3s. Block the gas inlet for another 30s, if the alarm message does not

disappear, the module does not leak.

 Microstream: Check that alarm message [CO2 Purging] is displayed on the screen

in 3s. Block the gas inlet for another 30s, if alarm message [CO2 FilterLine Err]

is shown, the module does not leak.

Calibration

Tools required:

 A gas bottle with 5% CO  T-shape connector  Tubing

gas

Follow this procedure to perform a calibration:

1. Make sure that the CO

module has been warmed up or started up.

2. Select [Main Menu]→[Maintenance >>]→[User Maintenance >>]→enter the required password→[Maintain CO2 >>].

3. In the [Maintain CO2] menu, select [Zero].

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Testing and Maintenance

4. Connect the gas bottle with the tubing using a T-shape connector as shown below.

Check the airway and make sure there are no leaks.

Open to the air

Gas valve

Tubing

Monitor

Gas bottle

5. Vent the tubing to the CO

6. In the [Calibrate CO2] menu, enter the vented CO

7. In the [Maintain CO2] menu, the measured CO

opening the gas valve.

concentration in the [CO2] field.

concentration, barometric pressure,

sensor temperature and current flowrate are displayed. After the measured CO2

concentration becomes stable, select [Calibrate CO2] to calibrate the CO

module.

8. If the calibration is finished successfully, the message [Calibration Completed!] is displayed. If the calibration failed, the message [Calibration Failed!] is displayed.

Perform another calibration.

3.4.3 ECG Tests

ECG Performance Test

Tool required:

 Patient simulator

1. Connect the patient simulator to the ECG/Resp connector on the module.

2. Set HR output to 80 bpm in the ECG simulator.

3. The displayed HR value should be 80 ± 1 bpm for 3- and 5-lead ECG monitoring, 80 ± 2

bpm for 12-lead ECG monitoring.

3-6

Testing and Maintenance

ECG Calibration

The ECG signal may be inaccurate due to hardware or software problems. As a result, the

ECG wave amplitude becomes greater or smaller. In that case, you need to calibrate the ECG

module.

1. Select the ECG parameter window or waveform area→[Filter]→[Diagnostic].

2. Select [Main Menu]→[Maintenance>>].

3. Select [Calibrate ECG]. A square wave appears on the screen and the message [ECG Calibrating] is displayed.

4. Compare the amplitude of the square wave with the wave scale. The difference should

be within 5%. You can also print out the square wave and the wave scale if necessary.

3.4.4 Resp Performance Test

Tool required:

 Patient simulator

1. Connect the patient simulator to the Resp connector on the module.

2. Configure the simulator as follows: base impedance line 1500 Ω; delta impedance 0.5 Ω,

respiration rate 40 rpm.

3. The displayed Resp value should be 40 ± 2 rpm.

3-7

Testing and Maintenance

3.4.5 NIBP Tests

NIBP Accuracy Test

Tools required:

 T-shape connector  Approprating tubing  Balloon pump  Metal Vessel with volume 500 ± 25 ml  Reference manometer with accuracy 1 mmHg

Monitor

Tubing

Connector for NIBP cuff

Balloon pump Metal vessel

Follow this procedure to perform the test:

1. Connect the equipment as shown above.

2. Before inflation, the reading of the manometer should be 0. If not, disconnect the airway

and reconnect it unit the readings is 0.

3. Select [Main Menu]→[Maintenance >>]→[NIBP Accuracy Test].

4. Compare the manometer values with the displayed values. The difference between the

manometer and displayed values should be no greater than 3 mmHg.

5. Raise the pressure in the metal vessel to 50 mmHg with the balloon pump. Repeat step 3

and 4.

Manometer

6. Raise the pressure in the metal vessel to 200 mmHg with the balloon pump. Repeat step

3 and 4.

NOTE

z You can use an NIBP simulator to replace the balloon pump and the reference

manometer to perform the test.

3-8

Testing and Maintenance

NIBP Leakage Test

Tools required:

 NIBP cuff for adult patient  Approprating tubing  Cylinder

Follow this procedure to perform the test:

1. Set [Patient Category] to [Adult].

2. Connect the NIBP cuff with the NIBP connector on the moduel.

3. Apply the cuff to the cylinder as shown below.

4. Select [Main Menu]→[Maintenance>>]→[NIBP Leakage Test]. The message [Leakage Testing…] is displayed in the NIBP parameter area.

5. The cuff automatically deflates in 20s which means NIBP leakage test is completed.

6. If the system does not leak, no message is displayed in the NIBP parameter area. If it

leaks, the message [NIBP Pneumatic Leak] is displayed. In this case, check for loose

connection and perform the test again.

Monitor

Connector for

NIBP cuff

Air tubing

Cylinder

Cuff

3-9

Testing and Maintenance

NIBP Calibration

Tools required:

 T-shape connector  Approprating tubing  Balloon pump  Metal Vessel with volume 500 ± 25 ml  Reference manometer with accuracy 1 mmHg

1. Connect the equipment as shown below.

2. Before inflation, the reading of the manometer should be 0. If not, disconnect the airway

and reconnect it unit the readings is 0.

3. Select [Main Menu]→[Maintenance >>]→[Factory Maintenance >>]→enter the required password→[Calibrate NIBP >>].

4. Set [NIBP Pressure] to 150 mmHg in the [NIBP measurement circuit]. Raise the pump output to 150 mmHg. After the pressure value is stabilized, select the [Calibrate]

button to start the calibration.

5. Set patient category to [Adu/Ped] in the [overpressure protection circuit], raise the pressure to 330 mmHg. Then, select [Calibrate] to start the calibration.

6. Set the patient category to [Neo] in the [overpressure protection circuit], raise the pressure to 165 mmHg. Then, select [Calibrate] to start the calibration.

7. Calibration result is displayed in the [Calibrate NIBP] menu. If calibration fails, Check

the system connection and perform calibration test again.

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Testing and Maintenance

3.4.6 IBP Tests

IBP Performance Test

Tool required:

 Patient simulator

1. Connect the patient simulator to the pressure connector on the module.

2. Set the pressure value of patient simulator to 0.

3. Press the Zero Key on the module to start a zero calibration.

4. Configure the patient simulator as P(static)=200 mmHg.

5. The displayed value should be 200 ± 2 mmHg.

6. If the value is beyond tolerance, calibrate the pressure module.

3-11

Testing and Maintenance

IBP Pressure Calibration

Tools required:

 Standard sphygmomanometer  Balloon pump  Tubing  T-shape connector

1. Connect the equipment as shown below

Pressure transducer

3-way stopcoc

T-shape connector

Manomete

2. Zero the transducer. After a successful zero, open the stopcock to the manometer.

3. Select [Main Menu]→[Maintenance >>]→[Cal. IBP Press. >>]. In the [Cal. IBP Press.] menu, enter calibration values for calibrated pressures.

4. Inflate using the balloon pump until the mercury in the manometer reaches to the preset

calibration pressure value.

5. Adjust the preset calibration value until it equals to the reading on the manometer.

6. Select the [Calibrate] button to the right of the calibrated pressure. The monitor starts a

calibration.

Pressure adapter cable

IBP module

7. If the calibration is completed successfully, the message [Calibration Completed!] will

be displayed. If not, respective message will be displayed.

3-12

3.4.7 SpO2 Test

Tool Required: Patient simulator.

Testing and Maintenance

1. Connect the patient simulator to the SpO

2. Select the model and the manufacturer of the SpO

configure the patient simulator as follows: SpO

3. The displayed SpO

and PR values should be within the ranges listed below.

SpO

connector on the MPM.

module under test, and then

96%; PR 80 bpm.

PR (bpm)

Mindray 96% ± 2% 80 ± 3

Masimo 96% ± 2% 80 ± 3

Nellcor

MAX-A, MAX-AL, MAX-N, MAX-P,

MAX-I, MAX-FAST

OxiCliq A, OxiCliq N, OxiCliq P, OxiCliq I 96% ± 2.5%

96% ± 2%

80 ± 3

D-YS, DS-100A, OXI-A/N, OXI-P/I 96% ± 3%

MAX-R, D-YSE, D-YSPD 96% ± 3.5%

3.4.8 C.O. Test

Tool required: Patient simulator

1. Connect the patient simulator to the C.O. connector on the module.

2. Set the patient simulator to output blood temperature (BT) 37ºC. The displayed temperature value should be 37 ± 0.1ºC.

3.4.9 Temp Test

Tool required: Resistance box

1. Connect the two pins of any Temp connector on the module to the two ends of the

resistance box using 2 wires.

2. Set the resistance box to 1354.9Ω(corresponding temperature is 37ºC). The displayed value should be 37 ± 0.2ºC.

3-13

Testing and Maintenance

3.4.10 BIS Test

1. Connect the BIS sensor with a normal and wide awake person as directed in the

Operation Manual.

2. The displayed BIS value should be higher than 80.

3.4.11 RM Test

Tool required:

 Gas source  Ventilator (calibrated)  Artificial lung  Flow sensor

Monitor

Ventilator

Flow sensor

Follow this procedure to check the performance of RM module:

1. Connect the equipment as shown above. Make sure that the blue sensing tube on the

flow sensor is connected with the artificial lung.

2. Set [Patient Category] to [Adult]. Enter [RM Setup] menu to select [Sensor Type] and set [Ventilation Mode] to [Mechanical].

3. Calibrate the flow sensor.

Artificial lung

4. Configure the ventilator or anesthetic machine as follows: TV 500 ml, respiration rate

=20 rpm, I:E=1:2.

5. Select [Respiratory Loop] in the [RM Setup] menu. Verify that displayed value meets

product specification.

3-14

Testing and Maintenance

3.4.12 ICG Test

Tool required: Patient simulator

1. Connect the patient simulator, ICG sensor and the patient monitor using standard ICG

cable.

2. Select [ICG setup]→[Patient Demographics >>]→ input parameter values as follows:

Height 173 cm CVP 6 mmHg

Weight 75 kg PAmean 8 mmHg

LV_D 50 mm Art Mean 93 mmHg

PAWP 10 mmHg

3. Switch the patient simulator to Mode 1 and then start ICG measurements.

4. After the measurement becomes stable, document the measured values.

5. Switch the patient simulator to mode 2 and then start ICG measurements. After the

measurement becomes stable, document the measured values.

6. Check that measured values meet the simulator configuration

3.4.13 AG Tests

AG Performance Test

Tool required:

 Gas bottle with a certain standard anesthetic gas. Gas concentration should meet

AA>1.5%, of which AA represents an anesthetic agent

 T-shape connector  Tubing

1. Plug the AG module in the module rack. Enter [AG Setup] menu and set [Operating Mode] to [Measure].

2. After the AG module warmup is ready, block the gas inlet of the AG module. Alarm

message [AC Airway Occluded] is displayed.

3. Connect the equipment as shown below.

4. Open and close the gas valve repeatedly at an interval of 3 seconds. The AA value

displayed should meet product specification.

3-15

Testing and Maintenance

BIS Performance Test

The AG module can incorporates the features of the BIS module, refer to 3.4.10 BIS Test for

test procedures.

O2 Performance Test

Tool required:

 Gas bottle with 100% O

 T-shape connector  Tubing

The AG module can incorporates the features of the O

module, refer to AG Performance

Test above for test procedures.

AG Calibration

Tools required:

 Gas bottle, with a certain standard gas or mixture gas. Gas concentration should meet

the following requirements: AA>1.5%, CO

represents an anesthetic agent.

 T-shape connector  Tubing  Reservoir bag

>1.5%, N2O>40%, O2>40%, of which AA

Follow this procedure to perform the calibration:

1. Select [Main Menu]→[Maintenance >>]→[User Maintenance >>]→enter the required password→[Calibrate AG >>].

2. Check the airway and make sure that there are no occlusions or leaks.

 Vent the sampling tubing to the air and check if the [Current FlowRate] and [Set

FlowRate] are approximately the same. If the deviation is great, it indicates that

there is an occlusion in the tubing. Check the tubing for an occlusion.

 Block the gas inlet of the tubing. The [Current FlowRate] shall fall rapidly and

the system prompt that the tubing is blocked. Otherwise, it indicates that there are

leakages in the tubing. Check the tubing for leakages.

3-16

Testing and Maintenance

3. Connect the gas bottle, reservoir bag and the tubing using a T-shape connector as shown

in the figure below.

Gas valve

Tubing

AG module

Reservoir

Gas bottle

4. Open the gas valve and vent a certain standard gas or mixture gas.

5. In the [Calibrate AG] menu, the concentration and flowrate of each measured gas are

displayed.

 If the difference between the measured gas concentration and the actual one is

tolerable, a calibration is not needed.

 If the difference is great, a calibration should be performed. Select [Calibrate >>]

to enter the calibrate menu.

6. Enter the vented gas concentration. If you use only one gas for calibration, set other

gases’ concentration to 0.

7. Select [Start] to start calibration.

8. If the calibration is finished successfully, the message [Calibration Completed!] is displayed. If the calibration failed, the message [Calibration Failed!] is displayed.

Perform another calibration.

3-17

Testing and Maintenance

3.5 Nurse Call Relay Performance Test

Tools required:

 Multimeter

1. Connect the nurse call cable to the Auxiliary Output Connector of the patient monitor.

2. Enter Demo mode. Select [Main Menu]→[Maintenance >>]→[User Maintenance >>] →enter the required password→[Others >>]→[Auxiliary Output]→[Nurse Call].

3. Select [Main Menu]→[Maintenance >>]→[User Maintenance >>]→enter the required password→[Others >>]→[Nurse Call Setup >>]. Enable all alarm level and alarm type options. Set [Contact Type] to [Normally Open]

4. In [Nurse Call Setup >>] setup menu, set [Signal Type] to [Pulse]. Trigger an alarm

and measure the output contact with the multimeter. The output should be square waves

with an interval of 1s.

5. In [Nurse Call Setup >>] setup menu, set [Signal Type] to [Continuous]. Trigger an

alarm and measure the contact output with the multimeter. The output should be

continuous high level.

3.6 Analog Output Performance Test

Tool required:

 Oscillograph

1. Connect the oscillograph to the Auxiliary Output Connector of the patient monitor.

2. Enter Demo mode. Select [Main Menu]→[Maintenance >>]→[User Maintenance >>] →enter the required password→[Others >>]→[Auxiliary Output]→[Analog Output].

3. Select [Main Menu] →[Analog Output Setup]. Switch Analog Output [On], and then

test the ECG and IBP signals from the Analog Output Connector.

4. The waveforms displayed on the oscillograph should closely resemble those displayed

on the patient monitor.

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Testing and Maintenance

3.7 Electrical Safety Tests

WARNING

z Electrical safety tests are a proven means of verifying the electrical safety of the

patient monitor. They are intended for determining potential electrical hazards. Failure to find out these hazards timely may cause personnel injury.

z Commercially available test equipment such as safety analyzer, etc. can be used for

electrical safety tests. Be sure that the test equipment can be safely and reliably used with the patient monitor before use. The service personnel should acquaint themselves with the use of the test equipment.

z Electrical safety tests should meet the requirements of the new edition of standards

EN 60601-1 and UL60601.

z These electrical safety tests do not supersede local requirements. z All devices using the AC mains and connected to medical equipment within patient

environments must meet the requirements of the IEC 60601-1 medical electrical systems standard and should be put under electrical safety tests at the frequency recommended for the patient monitor.

Electrical safety tests are intended to check if potential electrical hazards to the patient,

operator or service personnel of the equipment. Electrical safety test should be performed

under normal ambient conditions of temperature, humidity and pressure.

The electrical safety test plan described hereafter takes 601 safety analyzer as an example.

Different safety analyzers may be used in different areas. Be sure to choose applicable test

plan.

Connection of the equipment is shown below:

3-19

Testing and Maintenance

Tools required:

 Safety analyzer  Isolation transformer

3.7.1 Enclosure Leakage Current Test

1. Connect the 601 safety analyzer to an AC power supply (264 V, 60 Hz).

2. Connect SUM terminal of the applied part connection apparatus to RA input terminal of

601 safety analyzer, another terminal to the applied part of EUT.

3. Connect the EUT to the analyzer’s auxiliary output connector using a power cord.

4. Attach one end of the red lead to the “Red input terminal” of the analyzer, and the other

end to tinsel over the enclosure of the EUT.

5. Power on the 601 safety analyzer and then press the “5－Enclosure leakage” button on

the analyzer’s panel to enter the enclosure leakage test screen.

6. Under normal condition, the enclosure leakage current should be no greater than 100 µA.

Under single fault condition, it should be no greater than 300 µA.

3.7.2 Earth Leakage Current Test

1. Connect the 601 safety analyzer to an AC power supply (264 V, 60 Hz).

2. Connect SUM terminal of the applied part connection apparatus to RA input terminal of

601 safety analyzer, another terminal to the applied part of EUT.

3. Connect the EUT to the analyzer’s auxiliary output connector using a power cord.

4. Power on the 601 safety analyzer and then press the “4－Earth leakage” button on the

analyzer’s panel to enter the earth leakage test screen.

5. Under normal condition, the earth leakage current should be no greater than 300 µA.

Under single fault condition, it should be no greater than 1000 µA.

3-20

Testing and Maintenance

3.7.3 Patient Leakage Current Test

1. Connect the 601 safety analyzer to an AC power supply (264 V, 60 Hz).

2. Connect SUM terminal of the applied part connection apparatus to RA input terminal of

601 safety analyzer, another terminal to the applied part of EUT.

3. Connect the EUT to the analyzer’s auxiliary output connector using a power cord.

4. Power on the 601 safety analyzer and then press the “6－Patient leakage” button on the

analyzer’s panel to enter the Patient leakage test screen.

5. Repeatedly press the “Applied Part”button to measure AC and DC leakage alternatively.

DC leakage reading is following by “DC”.

6. Under normal status, the patient leakage current should be no greater than 10 µA. Under

single fault condition, it should be no greater than 50 µA.

3.7.4 Patient Auxiliary Leakage Current Test

1. Connect the 601 safety analyzer to an AC source (264 V, 60 Hz).

2. Connect the equipment under test (EUT) to the analyzer’s auxiliary output connector

using a power cord.

3. Connect the sensors of the applied part to the applied part connection apparatus, whose

RA-P terminal is connected to 601 safety analyzer’s RA terminal (which is turned on)

and SUM terminal to 601 safety analyzer’s LA terminal. RA terminal is switched to on.

4. Power on the 601 safety analyzer and then press the “8－Patient Auxiliary Current Test”

button on the analyzer’s panel to enter the patient auxiliary current test screen.

5. Repeatedly press the “Applied Part”button to measure AC and DC leakage alternatively.

DC leakage reading is following by “DC”.

6. Under normal status, the patient auxiliary leakage current should be no greater than 10

µA. Under single fault condition, it should be no greater than 50 µA.

3-21

Testing and Maintenance

3.8 Touchscreen Calibration

1. Select the [Cal. Screen] QuickKey or select [Main Menu]→[Maintenance >>]→[User Maintenance >>]→enter the required password→[Cal. Touchscreen].

2. The

3. Select, in turn, the central point of the

4. After the calibration is completed, the message [Scr een Calibration Completed!] is displayed. Select [Ok] to confirm the completion of the calibration.

symbol will appear at different positions of the screen.

symbol.

3.9 Recorder Check

1. Print ECG waveforms. The recorder should print correctly and printout should be clear.

2. Set the recorder to some problems such as out of paper, paper jam, etc. the patient

monitor should give corresponding prompt messages. After the problem is removed, the

recorder should be able to work correctly.

3. Switch automatic alarm recording for each parameter ON and then set each parameter’s

limit outside set alarm limits. Corresponding alarm recordings should be triggered when

parameter alarms occur.

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Testing and Maintenance

3.10 Factory Maintenance

3.10.1 Accessing Factory Maintenance Menu

To access the factory maintenance menu, select [Main Menu]→[Maintenance >>] → [Factory Maintenance]and then enter the required password.

The [Factory Maintenance] menu is shown below.

3.10.2 Drawing Waves

There are two methods to draw waves: Color and Mono.

 Color: selecting Color will have smoother waveforms.  Mono: selecting Mono will have a wider viewing angle.

3.10.3 Recorder

To enable/disable the recorder, select [Recorder] and toggle between [On] and [Off].

CAUTION

z The recorder is disabled if [Recorder] is switched off in the [Factory Maintenance]

menu.

3-23

Testing and Maintenance

3.10.4 Software Version

Selecting [Software Version] will show software version information. The display of [Software Version] menu is as follows:

3.10.5 Monitor Information

Selecting [Monitor Information] will show the status of the patient monitor. Monitor

information is displayed as follows:

3.10.6 Calibrate NIBP

For details, refer to section 3.4.5 NIBP Tests .

3-24

Testing and Maintenance

3.11 Program Upgrade

You can upgrade the software of the patient monitor by downloading the upgrade software

through network. At the same time, you can view the upgrade status log. The upgrade

software can directly run on a portable PC or desktop PC. Through the network or by

connecting the patient monitor to a PC via a crossover network cable, you can upgrade the

following programs:

 Boot program  System program  Multilingual library  BMP files (including screen icons, start-up screens, standby screens)  General configurations (including passwords, company logo)  System functional configuration  FPGA program  Integral module rack program  Satellite module rack program  Parameter module programs: MPM, IBP module, C.O. module, Mindray CO

RM module

For details, refer to help and instructions for program upgrade.

module,

CAUTION

z Disconnect the patient monitor from the patient and make sure the important data

are saved before upgrade.

z Do not shut down or power off the equipment when upgrading the boot program.

Otherwise, it may cause the equipment to break down.

z Program upgrade should be performed by qualified service personnel only.

NOTE

z After upgrading the boot program, re-upgrade the system program and other

programs to ensure compatibility.

z Make sure the version of the upgrade package is you desired one. If you want to

obtain the latest upgrade package, contact Mindray Customer Service Department.

3-25

FOR YOUR NOTES

Testing and Maintenance

3-26

4 Troubleshooting

4.1 Introduction

In this chapter, patient monitor problems are listed along with possible causes and

recommended corrective actions. Refer to the tables to check the patient monitor, identify and

eliminate the troubles.

The troubles we list here are frequently arisen difficulties and the actions we recommend can

correct most problems, but not all of them. For more information on troubleshooting, contact

our Customer Service Department.

4.2 Part Replacement

Printed circuit boards (PCBs), major parts and components in the patient monitor are

replaceable. Once you isolate a PCB you suspect defective, follow the instructions in 5 Repair and Disassembly to replace the PCB with a known good one and check that the

trouble disappears or the patient monitor passes all performance tests. If the trouble remains,

exchange the replacement PCB with the original suspicious PCB and continue

troubleshooting as directed in this chapter. Defective PCB can be sent to us for repair.

To obtain information on replacement parts or order them, refer to 6 Parts .

4.3 Patient Monitor Status Check

Some troubleshooting tasks may require you to identify the hardware version and status of

your patient monitor.

1. To view the information on system start time, self check, etc., select [Main Menu]→ [Maintenance >>]→[Monitor Information >>].

2. You can also view the information on the monitor’s current status by selecting [Main

Menu]→[Maintenance>>]→[Factory Maintenance>>]→enter the required password →[Monitor Information >>].

4-1

Troubleshooting

4.4 Software Version Check

Some troubleshooting tasks may require you to identify the configuration and software

version of your patient monitor.

1. To view information on the system configuration and system software version, Select

[Main Menu]→[Maintenance>>]→[Software Version>>].

2. You can also view the information on system software version and module software

version by selecting [Main Menu]→[Maintenance>>]→[Factory Maintenance>>]→ enter the required password →[Software Version>>].

4.5 Technical Alarm Check

Before troubleshooting the patient monitor, check for technical alarm message. If an alarm

message is presented, eliminate the technical alarm first. For detailed information on

technical alarm message, possible cause and corrective action, refer to the patient monitor’s

Operation Manual.

4.6 Troubleshooting Guide

4.6.1 Power On/Off Failures

Symptoms Possible Cause Corrective Action

The patient

monitor fails to

start. AC LED

or battery LED

does not light

AC mains not connected

or battery too low

Power supply protection Refer to 4.6.9 Power Supply Failures .

Cables defective or

poorly connected

Power switch & LED

board defective

Power module defective Replace the power module.

Check that AC mains is properly connected or

battery capacity is sufficient.

1. Check that the cables from power switch & LED

board to button board, button board to main board,

and power module to main board are correctly

connected.

2. Check that cables and connectors are not

damaged.

Replace the power switch & LED board.

Mother board Defective Replace the mother board.

4-2

Troubleshooting

4.6.2 Display Failures

Symptoms Possible Cause Corrective Action

Integrated

display is blank

but the patient

monitor still

works correctly.

Secondary

display does not

function.

Secondary

display displays

snows or

flashing specks

Cables defective or

poorly connected.

Backlight board

defective

Power module defective Replace the power module.

Display defective Replace the display.

Cables defective or

poorly connected.

DVI interface board

defective

Cables defective or

poorly connected.

1. Check that cables from the display to the mother

board and from the backlight board to the button

board/display are correctly connected.

2. Check that the cables and connectors are not

damaged.

Replace the backlight board.

1. Check that the cable between the display and the

patient monitor is correctly connected.

2. Check that the cables and connectors are not

damaged.

Replace the DVI interface board.

1. Check that the cable between the display and the

patient monitor is correctly connected.

2. Check that the cables and connectors are not

damaged.

overlapped or

distorted

Touchscreen

does not

response

DVI interface board

defective

The mother board is

damaged.

FPGA error. Update or upgrade FPGA. Images

Cables defective or

poorly connected.

Touchscreen disabled

Replace the DVI interface board.

Replace the mother board.

1. Check that the cable between the display and

mother board is correctly connected.

2. Check that the cables and connectors are not

damaged.

Check if there is a symbol

[Measurements] QuickKey. If yes, press the [Measurements] QuickKey for more than 3s to

enable the touchscreen.

shown above the

4-3

Troubleshooting

Cables defective or

poorly connected.

Touchscreen control

board defective

Button board defective. Replace the button board.

Touchscreen defective. Replace the touchscreen

Mother board defective Replace the mother board

Touch position

invalid

Touchscreen not

calibrated

4.6.3 Module Rack Failures

1. Check that the cables from the touchscreen to the

touchscreen control board, the touchscreen control

board to the button board, and the button board to

the mother board are correctly connected.

2. Check that the cables and connectors are properly

connected

Replace the touchscreen control board

Calibrate the touchscreen

Symptoms Possible Cause Corrective Action SMR

SMR cannot

identify

parameter

modules

Extension Cable

defective or poorly

connected

Defective parameter

module

Wrong communication

board software revision

Module (in some slots)

unrecognized

1. Check that the cable between SMR and main unit

is properly connected

2. Check that the connecting cables and connectors

are not damaged.

3. Check that contact screws on SMR are tightly

screwed and properly contact the SMR.

Replace the suspicious parameter module with a

known good module. Check if the patient monitor

identifies the replacement module. If yes, it means

that the original one is defective.

Upgrade the program of the module or SMR.

1. Replace the Nios II module.

2. Replace the 8-slot module rack communication

board.

4-4

Troubleshooting

Power supply failure 1. Check if the voltage between two contact screws

in any slot reaches 12V DC. If yes and the

parameter module functions, the PCB assembly in

SRM might fail.

2. If there is no 12 V sent to the SMR, check that

the power module output voltage to the USB

interface board reaches 12V. If yes, the fuse on the

USB interface board might blow. Replace the USB

interface board.

Cable defective or

poorly connected

Nios II module loose or

failure

SMR interface board

failure

SMR communication

board failure

USB interface board

failure

Mother board failure Replace the mother board.

Integral module rack

Integral module

rack cannot

identify

parameter

modules

Module failure Replace parameter module. If a new module is

Cable defective or

poorly connected

1. Check that the cable between SMR interface

board and communication board is properly

connected.

2. Check that connecting cables and connectors are

not damaged.

1. Check that Nios II module is correctly plug ed

2. If the symptom persists, replace the Nios II

module.

Replace the SMR interface board.

Replace the SMR communication board.

Replace the USB interface board.

identified, the original one is defective.

1. Check that the cables from 3-slot module rack

communication board to MPM module rack

communication board, module rack to mother board

are properly connected.

Wrong communication

board software revision

Module (in some slots)

unrecognized

2. Check that connecting cables and connectors are

not damaged.

Upgrade the program of the module or Integral

module rack.

3. Replace the Nios II module.

4. Replace the corresponding module rack

communication board.

4-5

Troubleshooting

Power supply to integral

module rack abnormal

3-slot or MPM module

rack communication

board failure

Nios II module failure Replace the Nios II module.

Mother board failure Replace the mother board.

4.6.4 Alarm Problems

1. Check if voltage between two contact screws in

any slot reaches 12VDC. If yes and the parameter

module functions, PCB assembly in the SMR might

fail.

2. If there is no 12V sent to the integrated module

rack, check that power module output voltage to

mother board reaches 12V DC. If yes, mother board

might fail.

Replace the 3-slot or MPM module rack

communication board.

Symptoms Possible Cause Corrective Action

The alarm lamp is

not light or

extinguished but

alarm sound is

issued

No alarm sound is

issued but alarm

lamp is light

Cable defective or

poorly connected

Alarm LED board

failure

Button board failure Replace the button board.

Mother board failure Replace the mother board.

Audio alarm

disabled

Cable defective or

poorly connected

1. Check that cables from alarm LED board to

button board and button board to mother board are

properly connected.

2. Check that connecting cables and connectors are

not damaged.

Replace the alarm LED board.

Select [Main Menu]→[Maintenance >>]→[User

Maintenance >>]→enter the required password→ [Alarm Setup >>], and then in the popup menu, set [Alm Sound] to [On].

1. Check that cable between speaker and mother

board is properly connected.

2. Check that connecting cables and connectors are

not damaged.

FPGA audio logic

error

Speaker failure Replace the speaker.

Mother board failure Replace the mother board.

Upgrade the audio logic part of the FPGA program.

4-6

Troubleshooting

4.6.5 Button and Knob Failures

Symptoms Possible Cause Corrective Action

Buttons do not

work

Knob does not

work

Cable defective or

poorly connected

Button board failure Replace button board.

Cable defective or

poorly connected

Knob failure Replace the knob encoder.

Button board failure Replace the button board

1. Check that cable between button board and

mother board is properly connected.

2. Check that connecting cables and connectors are

not damaged.

1. Check that cables from knob to button board, and

button board to mother board are properly connected

2. Check that connecting cables and connectors are

undamaged.

4.6.6 Recorder Failures

Symptoms Possible Cause Corrective Action

No printout

Recorder module

disabled

1. Check if the recorder status LED lights

2. If yes, enable the module in [Factory Maintenance] menu. Otherwise, check for other

possible causes.

Poor print quality

or paper not

feeding properly

Paper reversed Re-install the paper roll.

Cable defective or

poorly connected

Recorder power

supply failure

Recorder failure Replace the recorder.

Paper roll not

properly installed

Print head dirty 1. Check the thermal print head and the paper roller

Recorder failure Replace recorder.

1. Check that cable between recorder and mother

board is properly connected.

2. Check that connecting cables and connectors are

not damaged.

Check if the power module outputs 5 V DC and 12V

DC correctly.

Stop the recorder and re-install the paper roll.

for foreign matter.

2. Clean the thermal print head with an appropriate

clean solution.

4-7

Troubleshooting

4.6.7 Interface Failures

Symptoms Possible Cause Corrective Action

No analog signals or

nurse call signals are

issued

Device with USB port

does not function

(Assume that the

peripheral devices are

good)

Respective output

disabled

DVI interface board

cable loose

DVI interface board

failure

Mother board failure Replace the mother board.

Cable defective or

poorly connected

1. Select [Main Menu]→[Analog Output Setup]→set [Analog Output] to [On].

2. Select [Main Menu]→ [Maintenance>>]→[User Maintenance >>]→enter the required password→ [Others >>]→[Auxiliary Output]→select

desired output.

1. Check that cable between DVI interface

board and mother board is properly

connected.

2. Check that connecting cables and

connectors are not damaged.

Replace the DVI interface board.

1. Check that cable between USB interface

board and mother board is properly

connected.

2. Check that connecting cables and

connectors are not damaged.

USB interface board

failure

Mother board failure Replace the mother board.

4-8

Replace the USB interface board.

Troubleshooting

4.6.8 CF Card Problems

Symptoms Possible Cause Corrective Action

CF card malfunctions

Wrong CF card or small

memory space

Cable defective or

poorly connected

CF card board failure Replace the CF card board.

Mother board failure Replace the mother board.

Use only SanDisk-manufactured CF storage

cards. Those with 1GB memory space are

recommended.

1. Check that the cable between CF card

board and mother board is correctly

connected.

2. Check that connecting cables and

connectors not damaged.

4.6.9 Power Supply Failures

Symptoms Possible Cause Corrective Action

Different battery

voltages

Battery failure Replace battery.

Cable defective or

poorly connected

1. Check that the cable between battery

interface board and power module is

correctly connected.

Battery capacity is too

low

Battery cannot be

recharged

2. Check that cables and connectors are not

damaged.

Power board failure Replace the power board.

Battery failure Replace battery.

Cable defective or

poorly connected

Power board failure Replace the power board.

Battery failure Replace battery and recharge the replacement

1. Check that the cable is correctly

connected.

2. Check that connecting cables and

connectors are not damaged.

battery. If the replacement battery can be

recharged, the original one fails.

4-9

Troubleshooting

No +3.3 V output

No +5.0 V output

No +5.0 V CIS output

No +12 V output

Cable defective or

poorly connected

Power board failure Replace power board

Power supply protection

Power board failure

1. Check that cable between battery interface

board and power module is correctly

connected.

2. Check that cables and connectors are not

damaged.

1. Turn off the monitor then restart it.

2. If the problem remains, disconnect the AC

mains for 5 s and reconnect it, then restart the

patient monitor.

3. If the problem still remains, replace power

board.

NOTE

z When the power module has a failure, it may cause problems to other components,

e.g. the monitor suddenly breaks down during start-up, as the power module may have a power supply protection. In this case, troubleshoot the power module per the procedure described in the table above.

z Components of the main unit, SMR and parameter modules are powered by the

power module. In the event that a component malfunctions, check if the operating voltage is correct. Refer to 2 Theory of Operation for the operating voltage and measurement points of each com p onent.

4-10

Troubleshooting

4.6.10 Network Related Problems

Symptoms Possible Cause Corrective Action

The patient monitor

cannot be connected to

a CIS.

No connection to LAN 1. Check that the cables and connectors are in

good condition and that the network is

correctly connected.

2. Check that the hub or switch is correctly

configured.

CIS assembly failure 1. Restart the patient monitor, check that a

beep is heard and the CIS fan runs normally

after the system starts up.

2. After starting, select [Main Menu]→ [Maintenance>>]→[User Maintenance>>]

→ enter the password required. In the [User Maintenance] menu, [CIS Maintenance]

shall be enabled and switching between

normal monitor screen and CIS screen is

possible.

3. If step 1 and 2 fail, check the CIS fan

assembly for damage and if the power supply

to the CIS assembly is correct. If both of

them work correctly, replace the CIS

assembly.

Frequent dropouts and

network disconnects

The patient monitor is

connected to a LAN

but cannot view other

patients under the

View Others mode

DVI interface board

failure

Incorrect LAN cable

connection

Incorrect IP address

configuration

Incorrect LAN cable

connection

Excessive requests for

viewing the patient

monitor at the same time

Incorrect IP

configuration

CIS assembly failure Replace CIS assembly.

Replace DVI interface board.

Check LAN cable connection. LAN cable

shall not be longer than 50 m.

Check for IP address conflict. Reconfigure IP

address.

Check LAN cable connection. LAN cable

shall not be longer than 50m.

A patient monitor can only be viewed by 4

other patient monitors at the same time under

the View Others mode. The excessive view

requests system will be ignored.

Check for IP address conflict. Reconfigure IP

address.

4-11

Troubleshooting

4.6.11 Software Upgrade Problems

Symptoms Possible Cause Corrective Action

Boot file upgrade fails Power failure or

unintended power off

during boot file upgrade

Program upgrade fails

Incorrect network

connection

Wrong upgrade package

has been downloaded

Incorrect IP address

configuration

Return the CPU board to factory for repair.

1. Check that network connector, not CIS

connector, on the patient monitor is used.

2. Make sure that the hub or switch run

normally. Check that net twines are of the

right type and have been connected correctly.

Upgrade package shall be .pkg files. Select

package according to system requirement.

Configure a fixed IP address in range C as

specified for the patient monitor. We

recommend not to upgrade a program when

the patient monitor is connected to a network

with multiple PCs.

4-12

5 Repair and Disassembly

5.1 Tools

During disassembly and replacing, the following tools may be required:

 Phillips screwdrivers  Small flat-bladed screwdrivers  Contact spanner  Tweezers  Sharp nose pliers  Sleeve

5.2 Preparations for Disassembly

Before disassembling the monitor, finish the following preparations:

 Stop monitoring the patient, turn off the monitor and disconnect all the accessories and

peripheral devices.

 Disconnect the AC power source and take out both of the batteries.  Pull off all the modules in the integral module rack. If the SMR is connected, disconnect

the SMR from the monitor and then remove all the modules in it.

WARNING

z Before disassembling the monitor, be sure to eliminate the static charges first.

When disassembling the parts labeled with static-sensitive symbols, make sure you are wearing electrostatic discharge protection such as antistatic wristband or gloves to avoid damaging the equipment.

z Put the cables or wires in place when reassemble the monitor to avoid short circuit. z When assembling the monitor, be sure to select proper screws. If an unfit screw is

tightened by force, the monitor may be damaged and the screw or the part may fall off during use to cause unpredictable damage or human injury.

5-1

Repair and Disassembly

z Be sure to follow the correct sequence to disassembly the monitor. Otherwise, the

monitor may be damaged permanently.

z Be sure to disconnect all the cables before disassembling any parts. Be sure not to

damage any cables or connectors.

z Be sure to place the monitor face up when disassembling it. Otherwise, the screen

or the knob may be scratched or damaged.

5.3 Basic Disassembly

5.3.1 Disconnecting the Base

NOTE

z Be sure to disassemble the base first before proceeding with other parts. z Be sure to place the monitor face up when disassembling it. If lay the monitor face

down, be sure the surface is non-abrasive and static-free. Otherwise, the screen or the knob may be scratched or damaged.

1. Place the monitor face up and unscrew the four M4×12 screws, as shown in the figure

below.

5-2

Repair and Disassembly

2. Pull out the base and then unplug the two cables marked in the picture, one connecting

the Power Switch & LED board and the button board, and the other connecting the

battery interface board and the power supply assembly.

NOTE

z Exercise care when pulling the base out. Be sure not to damage the cables and

connectors.

5-3

Repair and Disassembly

5.3.2 Separating the Front and Rear Half of the Monitor

1. Keep the monitor (without the base) face up. Disconnect the cables marked in the

picture, one connecting the LCD panel and the mother board, and the other connecting

the button board and the mother board.

2. Carefully place the monitor face down. Pry up the four screw covers with a small

flat-bladed screwdriver and unscrew the four M3×12 screws exposed. Then unscrew the

M3×12 screw in the handle.

5-4

Repair and Disassembly

NOTE

z Press the cover with a thumb when prying it.

3. Lift the rear cover assembly to separate it from the front cover assembly.

5-5

Repair and Disassembly

5.4 Further Disassembly

5.4.1 Removing the Power Switch & LED Board

1. Locate the cable marked in the picture and disconnect it from the power switch & LED

board.

Left Clip

Right Clip

2. Release the clips with fingers. At the same time pinch the power switch & LED board,

push it to the left and take it out along with the power switch.

NOTE

z Exercise care whe releasing the clips. z When installing the LED board along with the power switch, put it on the left clip,

unclech the right clip to the right direction slightly, and then press it down.

5-6

Repair and Disassembly

5.4.2 Disconnecting the Knob Encoder

1. Disconnect the cable that connects the knob encoder and the button board. Then

unscrew the two M3×6 screws and take out the knob encoder.

5.4.3 Removing the Button Board

1. Locate the cables marked in the picture and disconnect them from the button board.

5-7

Repair and Disassembly

2. Unscrew the three PT3×8 screws and take out the button board.

5.4.4 Removing the LCD Assembly

CAUTION

z Do not touch the LCD screen. z Disassemble the LCD screen in an environment as dust-free as possible.

1. Disconnect the cables that connect the following parts.

 The backlight board and the button board.  The touchscreen control board and the button board.  The alarm lamp board and the button board.  The touchscreen and the touch screen control board

5-8

Repair and Disassembly

2. Unscrew the two M3×6 screws and take out the screen assembly carefully. If it is

necessary to take the touchscreen control board out separately, remove the cables

connecting to the button board and touchscreen first.

3. Unscrew the six M3×6 screws. Then remove the cables connecting the backlight board

to the LCD screen and to the button board and take out the backlight board by

unscrewing the two M3×6 screws on the backlight board.

5-9

Repair and Disassembly

4. Unscrew the eight M3×6 screws and take the screen assembly out carefully. To prevent

the screen from being contaminated by dust, do not touch the screen.

Do not touch the

LCD panel

5-10

Touchscreen

Repair and Disassembly

5.4.5 Removing the Alarm Lamp Board

1. After removing the LCD panel, disconnect the cable that connects the alarm lamp board

and the button board, and then remove the alarm lamp board on which there is no screw.

NOTE

z Exercise care when removing the alarm lamp board because it may be adhered to

the LCD assembly (as shown in the upper-right figure).

5-11

Repair and Disassembly

5.4.6 Removing the Main Board

1. Pull out all the connectors on the mother board. There are numbers beside the

connectors, which are listed below.

Number Connected to

J1 Power module

J3 Fan

J4 Integral module rack

J5 Button board

J6 DVI interface board

J7 LCD panel

J8 Recorder

J9 WLAN&CF assembly

J10 CIS assembly

J11 USB interface board

J12 Speaker

J22/J23 CPU board, which is connected to the mother board with a socket

5-12

Repair and Disassembly

2. Unscrew the four M3×6 screws as shown in the figure above and take out the main

board that includes the mother board and the CPU board.

3. Unscrew the four M2.5×6 screws and separate the mother board from the CPU board.

Be sure not to damage the socket that connects the two boards. There is a battery on the

CPU board.

Battery

5.4.7 Removing the CF/WLAN Assembly

1. Unscrew the two M3×6 screws.

5-13

Repair and Disassembly

2. Lift the CF/WLAN assembly and pull it out.

NOTE

z When reassembling the CF/WLAN assembly, be sure to align it with the WLAN

slot. Otherwise, it may be unable to be assembled into position.

3. Unscrew the four M3×6 screws and separate the CF storage card from the PCMCIA

card.

Socket

NOTE

z Be sure not to damage the socket that connects the two boards.

5-14

Repair and Disassembly

5.4.8 Removing the Fan

1. Disconnect the connector that connects the fan and the mother board. Then unscrew the

three M3×6 screws and remove the fan.

5.4.9 Removing the Speaker

1. Disconnect the connector that connects the speaker and the mother board. Then unscrew

the two M3×6 screws and remove the speaker.

CAUTION

z When installing a speaker, be sure to keep the cable from the press bar. Otherwise,

the speaker may be short-circuited.

5-15

Repair and Disassembly

5.4.10 Removing the Interface Board Assembly

1. Unscrew the four M3×6 screws and remove the interface board assembly.

2. Unscrew the screws beside the DVI socket. Then unscrew the two M3×6 screws in the

holes. After that, pull out the DVI interface board.

Screws beside DVI socket

Two M3×6 Screws in Holes

5-16

Repair and Disassembly

3. Unscrew the two M3×6 screws and take out the USB interface board upwards.

NOTE

z Before removing the USB interface board, the DVI interface board must be

removed first.

z Be careful not to damage the insulation between the DVI interface board and the

USB interface board. If it is damaged, stick a new one.

5.4.11 Removing the Power Supply Assembly

1. Disconnect the cables from the socket of the power supply.

NOTE

z For some cables, you have to release the clips on it before disconnecting them.

5-17

Repair and Disassembly

2. Unscrew the two M4×20 screws. Be sure to hold the power supply assembly to prevent

it from falling when unscrewing the screws.

3. Lift the power supply assembly slightly to separate it from the two shafts on the rear

cover and then remove the assembly.

Shafts

5-18

Repair and Disassembly

4. Unscrew the two M3×12 screws and remove the cover of the power supply.

5. Unscrew the two M3×6 screws. pry out the board with a small flat-bladed screwdriver in

the gap between the power supply board and the housing. Then turn the board over and

unplug the cables from it.

5-19

Insulator

Repair and Disassembly

AC Input Filter

Equipotential Pillar

NOTE

z Because the power supply board may be adhered to the insulator, be careful not to

damage the parts, connector and cables when prizing it.

5.4.12 Removing the Integral Module Rack

The following disassembling procedure takes the 5-slot module rack as an example. You can

disassemble other types of module rack by referring to this procedure.

1. Disconnect the cable that connects the integral module rack and the mother board.

Remove the two bolts and unscrew the M3×6 screw.

Bolts

5-20

Repair and Disassembly

2. Pry the snaps out about 1mm away with a small flat-bladed screwdriver. Then insert the

small flat-bladed screwdriver into the position marked in the picture and pry it out about

1mm so that the module rack becomes disengaged from the back cover.

3. If the module rack still engages with the back cover, insert a small flat-bladed

screwdriver into the position marked in the picture and pry it out about 1mm to release

the hidden snap between the integral module rack and the back cover. Then pull out the

module rack.

5-21

Repair and Disassembly

MPM Communication Board 3-slot module Rack Communication Board

CAUTION

z Be sure to release the hidden snaps first when removing the integral module rack.

Otherwise, the monitor will be damaged.

4. Release the three clips on the 3-slot module rack communication board and remove the

Nios II module.

5-22

Repair and Disassembly

Nios II module

5.4.13 Removing the Recorder

1. Open the recorder door and unscrew the two M3×6 screws.

5-23

Repair and Disassembly

2. Pull the two clips in the directions as indicated and meanwhile pull out the recorder.

NOTE

z Be sure not to damage the connecting cables or connectors when pulling out the

recorder.

3. Unscrew the M3×6 screw and remove the cables marked in the picture.

5-24

Repair and Disassembly

4. Unclench the two clips and meanwhile take out the recorder drive board. Pay attention

to the snap in the front.

Snap

5-25

Repair and Disassembly

5. Pull out the press bar upwards about 1mm and then pull off the flexible cable. Remove

the cable that connects the drive board and the button board. Unscrew the PT2×6 screw

and remove the drive board’s grounding cable. Then take out the recorder drive board.

Press bar

5-26

Repair and Disassembly

6. Unscrew the two PT2×6 screws and take out the thermal printhead. Then unscrew the

two PT2×6 screws and remove the recorder’s button board.

7. Remove the recorder mounting bracket by pulling out the recorder mounting bracket

from the right side first.

Recorder mounting bracket

5-27

Repair and Disassembly

8. Hold and then pinch the recorder housing so that the recorder housing becomes

disengaged from the monitor housing. Then take out the recorder housing.

NOTE

z When pinching the recorder housing, take care not to damage the recorder

housing.

z When reassembling the recorder housing and the recorder mounting bracket,

install the recorder mounting bracket first and meanwhile be sure the two clips are in right position. Otherwise, the recorder cannot be installed correctly.

5-28

Repair and Disassembly

5.5 Removing the SMR Assembly

1. First remove the 4 screw covers and then unscrew the 4 M3×8 screws.

Right-side board

2. Pull off the left- and right-side boards. Be sure to place the rubber loop in position when

reassembling the right board.

Left board

5-29

Repair and Disassembly

3. From the left side, remove the cable that connects the module rack interface board and

the 8-slot module rack communication board. Then take off the SMR cover.

4. Unclench the two clips and take out the module rack interface board. Be sure not to

damage the snap slot on the left side.

5. Remove the cable that connects the 8-slot communication board and the LED board, the

LED indicator and the light tube.

5-30

Repair and Disassembly

6. Unclench the clips and take out the Nios II module. Then unscrew the six M3×6 screws

and remove the 8-slot module rack communication board.

5-31

Repair and Disassembly

7. Use the sleeve to unscrew the hexagon nut and countersunk external toothed lock

washer assembly which can be further separated into the washer, springlet and contact

screw.

Washer Springlet

Hexagon nut and countersunk external

toothed lock washer assembly

Contact screw

5-32

Mindray BeneView T8 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual