Mindray H-046-011262-00-N19-N22-Service-Manual-FDA-5.0 DIRECT FEED LOOP DISINFECTION TANK AND HEADER INSTALLATION & OPERATION MANUAL

BeneVision N22/BeneVision N19

Patient Monitor

Service Manual

opyright 2018-2019 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.

C

Release time: January 2019

Revision 5.0

BeneVision N22/BeneVision N19 Patient Monitor Service Manual I

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.

, is the trademark, registered or otherwise, of 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.

This posting serves as notice under 35 U.S.C.§287(a) for Mindray patents: http://www.mindrayna.com/patents.

WARNING

 Federal Law (USA) restricts this device to sale by or on the order of a physician or other practitioner

licensed by U.S. state law to use or order the use of this device.

NOTE

 This manual describes all features and options. The equipment may not have all of them. Contact

Mindray Technical Support department for any questions.

II BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Manufacturer’s Responsibility

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

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

 All installation operations, expansions, changes, modifications and repairs of this product are conducted by

Mindray authorized personnel;

 The electrical installation of the relevant room complies with the applicable national and local requirements;
 This product is operated under strict observance of the operator’s manual.

Return Policy

In the event that it becomes necessary to return a unit to Mindray, follow the instructions below.

1. Obtain a return authorization.

Contact the Mindray Service Department and obtain a Mindray Customer Service Authorization Number. The

Mindray Customer Service Authorization Number must appear on the outside of the shipping container. Return

shipments will not be accepted if the Mindray Customer Service Authorization Number is not clearly visible. Please

provide the model number, serial number, and a brief description of the reason for return.

2. Freight policy

The customer is responsible for freight charges when this product is shipped to Mindray for service (including any

relevant customs fees or other freight related charges).

3. Return address

Please send the part(s) or equipment to the address offered by Customer Service Department.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual III

Service

Mindray maintains a network of service representatives and factory-trained distributors. Prior to requesting service,

perform a complete operational check of the instrument to verify proper control settings. If operational problems

continue to exist, contact Mindray service.

In North America contact the Service Department at [phone], ext: 8116 for Technical Support or [phone]

for assistance in determining the nearest field service location.

Please include the instrument model number, the serial number, and a description of the problem with all requests for

service.

Any questions regarding the warranty should be directed to your local sales or service representative.

NOTE

 Upon request, Mindray provides circuit diagrams, component part lists, descriptions, calibration

instructions, or other information which assist the user’s appropriately qualified technical

personnel to repair those parts of the equipment which are designated by Mindray DS USA, Inc. as

repairable.

Contact Information

Manufacturer:

Address:

Tel:

Fax:

Website:

Distributor:

Address:

Tel:

Website:

Shenzhen Mindray Bio-Medical Electronics Co., Ltd.

Mindray Building, Keji 12th Road South, High-tech Industrial Park, Nanshan, Shenzhen

518057 P.R. China

[phone]

[phone]

www.mindray.com

Mindray DS USA, Inc.

800 MacArthur Boulevard, Mahwah, New Jersey 07430 USA

1.800.288.2121, 1.201.995.8000

www.mindray.com

IV BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Preface

Manual Purpose

This manual provides detailed information about the assembly, disassembly, 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. Use of the manual is necessary for proper

equipment maintenance and will help to eliminate equipment damage and personal 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.

Contact your local Mindray Service Organization for information on product courses which address service and support

for this product.

Passwords

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

 User maintenance: MIN888 (User adjustable)
 Configuration mode: MIN315 (User adjustable)

It is recommended that the user should change the passwords for user maintenance and configuration mode once they

take ownership of the equipment.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual V

FOR YOUR NOTES

VI BeneVision N22/BeneVision N19 Patient Monitor Service Manual

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 ..................................................................................................................................................................................................... 1-2

1.2 Equipment Symbols ....................................................................................................................................................................................... 1-2

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

2.1 Overview ............................................................................................................................................................................................................ 2-1

2.2 Product System Architecture ...................................................................................................................................................................... 2-1

2.2.1 Functions of the Main Control Module ..................................................................................................................................... 2-3

2.2.2 AC-DC Module ................................................................................................................................................................................... 2-4

2.2.3 Functions and Socket Definitions of the DCDC Board ........................................................................................................ 2-4

2.2.4 Front Housing Interface Board ..................................................................................................................................................... 2-7

2.2.5 iView Substrate .................................................................................................................................................................................. 2-8

2.3 Power System ................................................................................................................................................................................................... 2-8

2.3.1 Power Diagram of the Main Unit and the Module Rack ..................................................................................................... 2-8

2.3.2 The Secondary Screen of N22/N19 Uses Independent AC Adapter for Power Supply ............................................ 2-9

2.4 Signal Logic Flow ............................................................................................................................................................................................ 2-9

2.4.1 Startup Signal Flow .......................................................................................................................................................................... 2-9

2.4.2 Display Signal Flow ....................................................................................................................................................................... 2-10

2.4.3 Display Brightness Control ......................................................................................................................................................... 2-11

2.4.4 Module Initialization ..................................................................................................................................................................... 2-12

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

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

3.1.1 Test Equipment .................................................................................................................................................................................. 3-1

3.1.2 Preventative Maintenance ............................................................................................................................................................. 3-1

3.1.3 Recommended Frequency ............................................................................................................................................................ 3-2

3.2 Preventative Maintenance Procedures ................................................................................................................................................... 3-3

3.2.1 Visual Inspection ............................................................................................................................................................................... 3-3

3.2.2 NIBP Tests ............................................................................................................................................................................................. 3-4

3.2.3 Sidestream and Microstream CO2 Tests .................................................................................................................................... 3-6

3.2.4 AG Tests ................................................................................................................................................................................................ 3-8

3.3 Power On Test ................................................................................................................................................................................................ 3-11

3.4 Module Performance Tests ....................................................................................................................................................................... 3-11

3.4.1 ECG Tests ........................................................................................................................................................................................... 3-11

3.4.2 Resp Performance Test ................................................................................................................................................................. 3-12

3.4.3 SpO2 Test ........................................................................................................................................................................................... 3-12

3.4.4 NIBP Tests .......................................................................................................................................................................................... 3-12

3.4.5 Temp Test .......................................................................................................................................................................................... 3-13

3.4.6 IBP Tests ............................................................................................................................................................................................. 3-13

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 1

3.4.7 C.O. Test .............................................................................................................................................................................................. 3-15

3.4.8 Sidestream and Microstream CO2 Tests ................................................................................................................................... 3-15

3.4.9 AG Tests ................................................................................................................................................................................................ 3-15

3.4.10 EEG Test ............................................................................................................................................................................................ 3-15

3.4.11 BIS Test .............................................................................................................................................................................................. 3-17

3.4.12 CCO/SvO2 Tests ............................................................................................................................................................................... 3-17

3.4.13 NMT Tests ......................................................................................................................................................................................... 3-18

3.5 Nurse Call Relay Performance Test ......................................................................................................................................................... 3-19

3.6 Analog Output Performance Test ........................................................................................................................................................... 3-19

3.7 Electrical Safety Tests .................................................................................................................................................................................. 3-20

3.8 Recorder Check ............................................................................................................................................................................................. 3-20

3.9 Network Print Test ........................................................................................................................................................................................ 3-21

3.9.1 Device Connection and Setup ................................................................................................................................................... 3-21

3.10 Battery Check .............................................................................................................................................................................................. 3-21

3.11 Mounting Check ......................................................................................................................................................................................... 3-22

3.11.1 Safety check ................................................................................................................................................................................... 3-22

3.11.2 Overall Test and Check of Installed System ........................................................................................................................ 3-22

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

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

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

4.3 Check before Powering on the Monitor ................................................................................................................................................. 4-1

4.4 Software Version Check ................................................................................................................................................................................ 4-1

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

4.6 Blank Screen upon Startup ......................................................................................................................................................................... 4-2

4.7 Troubleshooting Guide ................................................................................................................................................................................ 4-3

4.7.1 Power On/Off Failures ..................................................................................................................................................................... 4-3

4.7.2 Display Failures .................................................................................................................................................................................. 4-4

4.7.3 Module Rack Failures ...................................................................................................................................................................... 4-5

4.7.4 Alarm Failures .................................................................................................................................................................................... 4-6

4.7.5 Output Interface Failures ............................................................................................................................................................... 4-7

4.7.6 Power Supply Failures ..................................................................................................................................................................... 4-7

4.7.7 Network Related Problems ........................................................................................................................................................... 4-8

4.7.8 Device Integration Failures ........................................................................................................................................................... 4-9

5 Hardware Configuration Options .................................................................................................................................... 5-1

5.1 Overview ........................................................................................................................................................................................................... 5-1

5.2 Optional Parameter Function Modules .................................................................................................................................................. 5-2

5.3 Optional Functional Assemblies ............................................................................................................................................................... 5-3

5.3.1 Installing an SMR .............................................................................................................................................................................. 5-3

5.3.2 Installing an Secondary Display .................................................................................................................................................. 5-3

5.3.3 Upgrading Split Unit ....................................................................................................................................................................... 5-4

5.3.4 Setting up Wireless Network Functions ................................................................................................................................... 5-4

5.3.5 Upgrading Handle Assembly ....................................................................................................................................................... 5-4

5.3.6 Installing the Main Unit Battery .................................................................................................................................................. 5-4

2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

5.3.7 Upgrading iView System Functions ........................................................................................................................................... 5-4

6 Disassembly and Repair.................................................................................................................................................... 6-1

6.1 Tools ..................................................................................................................................................................................................................... 6-1

6.2 Preparations for Disassembly ..................................................................................................................................................................... 6-1

6.3 Whole Unit Disassembly ............................................................................................................................................................................... 6-1

6.3.1 Disassembling Display and Main Unit (Main Unit and Display Integrated Installation) ......................................... 6-2

6.3.2 Removing Handle/Encoder (Optional Encoder) .................................................................................................................... 6-3

6.3.3 Removing Handle Cover ................................................................................................................................................................ 6-4

6.3.4 Removing Main Unit Housing/Main Unit Interface Adapter Board (Main Unit and Display Separated

Installation) .................................................................................................................................................................................................... 6-4

6.3.5 Removing Display Interface Adapter Board (Main Unit and Display Separated Installation) ............................... 6-5

6.4 Disassembling Display (Capacitive Touchscreen) ............................................................................................................................... 6-6

6.4.1 Removing Display Rear Housing Assembly (D19)................................................................................................................. 6-6

6.4.2 Removing Display Rear Housing Assembly (D22)................................................................................................................. 6-7

6.4.3 Removing Switch Keypad Board ................................................................................................................................................. 6-7

6.4.4 Removing Display Interface Board/Touchscreen Panel ...................................................................................................... 6-8

6.4.5 Removing USB Board ...................................................................................................................................................................... 6-9

6.4.6 Removing LED Board/Indicator Board ................................................................................................................................... 6-10

6.5 Disassembling Main Unit .......................................................................................................................................................................... 6-10

6.5.1 Removing iView Assembly (iView Assembly Optional).................................................................................................... 6-10

6.5.2 Removing iView Assembly Support Board/USB Interface Board (iView Assembly Optional) ........................... 6-11

6.5.3 Removing Battery .......................................................................................................................................................................... 6-11

6.5.4 Removing ACDC Power Board .................................................................................................................................................. 6-12

6.5.5 Removing DCDC Power Management Board ...................................................................................................................... 6-13

6.5.6 Removing Antenna Module and Antenna Cable ............................................................................................................... 6-13

6.5.7 Removing SSD Hard Disk ............................................................................................................................................................ 6-14

6.5.8 Removing Main Control Board .................................................................................................................................................. 6-14

6.5.9 Removing Battery Backplane .................................................................................................................................................... 6-15

6.6 Disassembling the Module Rack ............................................................................................................................................................ 6-15

6.6.1 Disasembling the Handle and Hooks ..................................................................................................................................... 6-15

6.6.2 Disassembling the Rear Case of Module Rack..................................................................................................................... 6-16

6.6.3 Disassembling the Module Rack Interface Board .............................................................................................................. 6-16

6.6.4 Disassembling the Infrared Backplane of Module Rack .............................................................................................. 6-17

6.7 Disassembling the M51C Module .......................................................................................................................................................... 6-18

6.7.1 Disassembling the Front Panel Assembly ............................................................................................................................. 6-18

6.7.2 Disassembling the Parameter Board ...................................................................................................................................... 6-18

6.7.3 Disassembling the SpO2 board ................................................................................................................................................ 6-19

6.7.4 Disassembling the Infrared Board ........................................................................................................................................... 6-19

6.7.5 Removing the Pump and Valve................................................................................................................................................. 6-19

7 Parts ................................................................................................................................................................................... 7-1

7.1 Main Unit ........................................................................................................................................................................................................... 7-1

7.1.1 Exploded View .................................................................................................................................................................................... 7-1

7.1.2 Parts List ............................................................................................................................................................................................... 7-1

7.2 D19 Display Assembly (Capacitive Screen) ........................................................................................................................................... 7-3

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3

7.2.1 Exploded View .................................................................................................................................................................................... 7-3

7.2.2 Parts List ............................................................................................................................................................................................... 7-3

7.3 D22 Display Assembly (Capacitive Screen) ........................................................................................................................................... 7-5

7.3.1 Exploded View .................................................................................................................................................................................... 7-5

7.3.2 Parts List ............................................................................................................................................................................................... 7-5

7.4 Encoder Assembly .......................................................................................................................................................................................... 7-7

7.4.1 Exploded View .................................................................................................................................................................................... 7-7

7.4.2 Parts List ............................................................................................................................................................................................... 7-7

7.5 Module Rack ..................................................................................................................................................................................................... 7-8

7.5.1 Exploded View .................................................................................................................................................................................... 7-8

7.5.2 Parts List ............................................................................................................................................................................................... 7-8

7.6 iVIEW Module ................................................................................................................................................................................................... 7-9

7.6.1 Exploded View .................................................................................................................................................................................... 7-9

7.6.2 Parts List ............................................................................................................................................................................................... 7-9

7.7 Main Unit Separated Installation Auxiliary Accessories ................................................................................................................. 7-10

7.7.1 Exploded View .................................................................................................................................................................................. 7-10

7.7.2 Parts List ............................................................................................................................................................................................. 7-10

7.8 Main Unit Base Assembly .......................................................................................................................................................................... 7-11

7.8.1 Exploded View .................................................................................................................................................................................. 7-11

7.8.2 Parts List ............................................................................................................................................................................................. 7-11

7.9 Battery Cavity Assembly ............................................................................................................................................................................ 7-13

7.9.1 Exploded View .................................................................................................................................................................................. 7-13

7.9.2 Parts List ............................................................................................................................................................................................. 7-13

7.10 M51C Module .............................................................................................................................................................................................. 7-14

7.10.1 Exploded View ............................................................................................................................................................................... 7-14

7.10.2 Parts List .......................................................................................................................................................................................... 7-14

A Electrical Safety Inspection .............................................................................................................................................. A-1

A.1 Power Cord Plug ............................................................................................................................................................................................. A-1

A.2 Device Enclosure and Accessories ........................................................................................................................................................... A-1

A.3 Device Labelling ............................................................................................................................................................................................. A-2

A.4 Scheduled Electrical Safety Inspection .................................................................................................................................................. A-2

A.5 Electrical Safety Inspection after Repair ................................................................................................................................................ A-2

A.6 Electrical Safety Inspection Tes t ................................................................................................................................................................ A-3

4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

1 Safety

DANGER

1.1 Safety Information

 Indicates an imminent hazard that, if not avoided, will result in death or serious injury.

WARNING

 Indicates a potential hazard or unsafe practice that, if not avoided, could result in death or serious

injury.

CAUTION

 Indicates a potential hazard or unsafe practice that, if not avoided, could result in minor personal injury

or product/property damage.

NOTE

 Provides application tips or other useful information.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 1-1

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

 All installation operations, expansions, changes, modifications and repairs of this product should be

conducted by Mindray authorized personnel.

 There is high voltage inside the equipment. Never disassemble the equipment before it is disconnected

from the AC power source.

 When you disassemble/reassemble a parameter module, a patient leakage current test must be

performed before it is used again for monitoring.

 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.

 Dispose of the package material, observing the applicable waste control regulations and keeping it out

of children’s reach.

1.1.3 Cautions

CAUTION

 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.

 Before connecting the equipment to the power line, verify the voltage and frequency ratings of the

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

 Protect the equipment from damage caused by drop, impact, strong vibration or other mechanical force

during servicing.

1.1.4 Notes

NOTE

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

1.2 Equipment Symbols

See the N series Operator’s Manual (P/N: 046-011259-00) for information about the symbols used on this product and its

packaging.

1-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

2 Operation Theory

2.1 Overview

TheN22/N19 patient monitor provides rich functionality to monitor patient’s vital signs including ECG, Resp, SpO2, Temp,

N IB P, I B P, CO

monitor supports alarm management, data review, recording and printing of patient reports, and calculation.

TheN22/N19 patient monitor is applicable to various departments in a hospital, in particular, to the applications in

intensive care, first aid, operation room and the relevant departments.

The N22/N19patient monitor provides clinical decision-making tools to assist the medical personnel in making diagnosis

and clinical judgment faster and more accurately. Information access to clinical information system can meet the

information requirements of doctors and nurses so as to shorten the time of obtaining information and analyze the

clinical experience. These features could better meet the application requirements of high-end users.

, AG, O2, RM, C.O., CCO, ICG, SvO2/ScvO2, BIS, EEG, NMT, tcGas and rSO2. Based on these parameters, the

2

2.2 Product System Architecture

N22/N19 monitor mainly consists of three parts: main unit, display and module rack. All-in-one installation or split-type

installation could be adopted for the main unit and the display.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-1

ACDC

Power manage Board& interface board

Bay Trail Main

Board

Front Interface Board

For Integrate Type

Battery Interface

Board

WiFi

Module

Battery

LCD

Resistive

Touch

Panel

Speaker

Alarm

&logo LED

Board

Resistive

Touch Panel

Controller

Board

W1

W4

Backlight

LVDS

Remote

Receiver

(Reserved)

Touchpad&

knob&USB

Indicator

LED

Power
Button

W3

WD

W

2

DP USB NET

UART2 STATUS

UART1

W6

W8

SMR

SMR

SMR

W7

The main PCBAs of the system include:

Main unit: DCDC and interface board, ACDC board, and main board and interface board.

Display: display interface board

Module rack: Module rack interface board, and 8-slot module rack communication board.

2-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

2.2.1 Functions of the Main Control Module

The main board is supported by the Bay Trail platform and uses Intel’s Bay Trail-I E38xx series processors.

Architecture of the Main Board

As the core control unit of the system, the main board is responsible for such core functions of the system as display,

data processing and data storage.

The main board also provides high-speed interfaces, such as USB connector, DP interface and network connector.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-3

2.2.2 AC-DC Module

The ACDC module converts the input voltage of 100~240V 50/60Hz AC into the output of 16V 10A DC.

2.2.3 Functions and Socket Definitions of the DCDC Board

2.2.3.1 Functions of the DCDC Board

The DCDC board is responsible for the conversion of the data signal of the main board into the external interface and is

responsible for generating the various DC voltages the hardware system requires and for implementing the power

management function. The major functions include:

 Generation and management of 12V, 5V, 3.3V, Vbus and 3.3VB power supply required for the system operation;
 Extension of connectors such as SMR;
 Monitor startup and shutdown;
 Battery management;

2.2.3.2 Definitions of the DCDC Board Socket

The DCDC board is the core for connecting other PCBAs inside the main unit, and the main sockets include:

16V DC input power socket used for connecting to the ACDC board

Connector Type B6PH-VS

Pin No. Signal Name Signal Direction Function Definition Remarks

1 16V IN DC input /

2 16V IN DC input /

3 16V IN DC input /

4 GND / Ground /

5 GND / Ground /

6 GND / Ground /

2-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Power connector of the battery interface board

Used for connecting the charging and discharging power of the battery interface board.

Connector Type B4PS-VH

Pin No. Signal Name Signal Direction Function Definition Remarks

1 GND / Ground /

2 BAT BI Battery power /

3 BAT BI Battery power /

4 GND / Ground /

Signal connector of the battery interface board

Used for connecting the battery availability signal and SMB signal of the battery interface board.

Connector Type B3B-PH-K-S

Pin No. Signal Name Signal Direction Function Definition Remarks

1 BAT_BC IN Battery availability signal /

2 SMB_D BI SMBus data signal /

3 SMB_C OUT SMBus clock signal /

Power connector of the main board

Used for connecting the main board to provide 3.3V, 5V and 16V DC power to the main board.

Connector Type 43045-0800

Pin No. Signal Name Signal Direction Function Definition Remarks

1 3.3V OUT DC output /

2 5V OUT DC output /

3 5V OUT DC output /

4 16V OUT DC output /

5 GND / Ground /

6 GND / Ground /

7 GND / Ground /

8 GND / Ground /

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-5

Signal connector of the main board

Used for connecting the main board, including SPI, USB, UART, reset, power indicator and management signals.

Connector Type 5015714007

Pin No. Signal Name Signal Direction Function Definition Remarks

1 GND / Ground /

2 GND / Ground /

3 USB_DP BI USB D+ /

4 SPI_LVDS_CLKP IN SPI differential clock Reserved

5 USB_DM BI USB D- /

6 SPI_LVDS_CLKP IN SPI differential clock Reserved

7 GND / Ground /

8 GND / Ground /

9 USB_Hub_RST# IN USB Hub reset /

10 SPI_CLK IN SPI clock /

11 FPGA_RST# IN FPGA reset /

12 GND / Ground /

13 NC / No signal connection /

14 SPI_MOSI IN Primary output of SPI /

15 NC / No signal connection /

16 GND / Ground /

17 NC / No signal connection /

18 SPI_MISO OUT Secondary output of SPI /

19 NC / No signal connection /

20 GND / Ground /

21 GND / Ground /

22 SPI_CS# IN SPI chip select /

23 EC_S3# IN S3 power status /

24 SPI_CTL1 IN GPI /

25 EC_S4# IN S4 power Status /

26 SPI_CTL2 OUT GPO /

27 PLTRST#_Report IN CPU reset status /

28 EC_RST#_Report IN EC reset status /

29 AC_BC OUT AC availability /

30 GND / Ground /

31 Battery_Yellow OUT

32 M0_TXD OUT M0 UART sending /

33 Battery_Green OUT

34 M0_RXD IN M0 UART receiving /

35 PWROK OUT Power supply status /

36 NC / No signal connection /

37 PWR_BTN# OUT Main control startup and /

2-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Battery driven by yellow

LED

Battery driven by green

LED

/

/

Connector Type 5015714007

Pin No. Signal Name Signal Direction Function Definition Remarks

shutdown

38 NC / No signal connection /

39 GND / Ground /

40 GND / Ground /

DC power output connector of the main unit

Used by the main unit for providing 12V power supply to the display.

Connector Type 43045-0409

Pin No. Signal Name Signal Direction Function Definition Remarks

1 12V OUT DC output /

2 12V OUT DC output Reserved

3 GND / Ground Reserved

4 GND / Ground /

2.2.4 Front Housing Interface Board

The front housing interface board and its peripheral circuits are mainly used for realizing the control of the alarm LED,

LOGO LED, backlight and audio, as well as the detection and transmission of the touchscreen, encoder and ambient

light.

As the front housing interface boardhas much to control, a microcontroller unit (MCU) is used for the central control. The

MCU is connected to the main control of the system through the DisplayPort AUX channel (DP AUX), and the USB

connection channel is reserved.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-7

��5V

iPC support board

COME Type10

i

P

C

C

o

n

n

RJ45

m

S

A

T

A

SATA0

Conn

GbE

USB0

UART

0

HDMI

TMDS

HDMI to

MIPI-CSI2

CSI2 x4 Lane

16V

Power

Managment

PWR_BTN#

RST#

FAN

FAN

Control

FAN

Contro

l

5VCC

5VSB

Power

Switch

16V_iPC

SUS_S4#

16V Over

Current

Protection

3.3V DC-DC

5V DC-DC
Always on

VDD

5VSB

Power
Switch

SUS_S3#

5VCC

BD_16V

SUS_S3#

16V

SUS_S3#

BD_16V_OC#

BD_16V_EN

iPC_BC#

Connect

to GND

PCIe Port0

PCIe

GbE

MAC

/PHY

(I211-AT)

GbE

Debug

� Reserved�

TPM

Level

Shifter

TMDS

DDC

DDC

I2C

EEPROM

EDID

5VSB

16V

VDD_PG

&

0

0

0

SUS_S3#

VDD_PG

SUS_S3#

PWR_OK

Conn

USB Type A

Connector x

4

USB Hub

(USB2517

)

USB x 4

USB

CB_RST

#(COME)

RST#

BEEP

SPKR

LCD

backlight

Alarm LED

board

USB

12V

12V

12V

LCD

5V

5V

CPU

CPU of

main

control

5V@5

.2A

3.3V

Main board

Display interface board

Slow
start

power

Slow start

power

Power
Supply

DCDC

5V

3.3V

3

.3VLDO

MCU� M0�

12V

_EN

5

V_EN

3

.3V

_EN

DCDC board

4mA(Typ)

AC-

DC

board

Charging and

discharging

management

LED

DCDC

12V

12V

3.3V

VBUS

_EN

Charging

circuit

3.3V

Hot swap

circuit

Hot swap

circuit

Hot swap

circuit

Module rack1

Module rack3

12

V

12V

VBUS:

10V-

16V/140W(MAX)

16

V

iView module

12V

12V

EN

12V

12V

Module rack2

12V

12V

DCDC board

2.2.5 iView Substrate

iView substrate is mainly used to carry the COME module (COM Express module), extending the function of the COME to

standard interfaces as well as communication signals with the main board.

The COME module uses Type10 module (mechanical size: 55 mm x 84 mm) as defined in the specifications, and the

connection with the main board could be realized with one 220pin socket.

2.3 Power System

2.3.1 Power Diagram of the Main Unit and the Module Rack

The power management MCU is the core of the power management. In the system, 3.3V STB output could be realized

with any power input (AC or battery), which means that the power management MCU works properly. The display

interface board and module rack of the front housing could directly use the system's 12V power supply.

2-8 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

N22/N19 System

Primary

display

(split type)

Secondary

display

Main unit

AC adapter of

the secondary

display

AC power 1

AC power 2

Only signals, no power supply

User

Battery

Primary display

(all-in-one)

2.3.2 The Secondary Screen of N22/N19 Uses Independent AC Adapter for Power Supply

The connection is as shown below:

The battery is in the main unit, and the secondary screen is connected to the adapter. The primary and secondary

display controls are independent of each other, allowing the secondary display to be turned on or off without affecting

the complete system.

2.4 Signal Logic Flow

2.4.1 Startup Signal Flow

Major power-on process:

 Startup signal -> DCDC board power-on 12V, 3.3V, and 5V
 The main board operates based on the power-on sequence of the PC
 The main control enters BIOS, initializes peripherals of the main control, reads EDID and sets the display to ON
 The front housing enters the initialization state through the 12V power conversion
 The SMR enters the initialization state through the 12V power conversion
 Handshake would be implemented by the system after 40s, and the connection is established between the front

housing, SMR, and the main control

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-9

N22/N19 System

Front housing assembly (primary display)

Front Interface board

Main unit

DP

System

main

control

MCU and

firmware

of the

front

interface

board

DP

Reciver

USB

I2

C

USB
HUB

USB

Touchscreen

control board

Encoder

UART

Audio
circuit

Speaker

Alarm light

LOGO LED

Screen

backlight

Reserved

USB

External

Flash

Front housing assembly (

secondary display)

DP

USB

Ambient light

detection

Note: If the display is connected to the AC power supply, power failure of the main unit will not cause display power

failure.. Therefore, to completely disconnect the power supply from the system, disconnect the AC power cord of the

main unit, and hold the power switch for 15 seconds. Disconnect the AC power cord of the display..

2.4.2 Display Signal Flow

The display function is implemented through the output of the main control, and it is realized through sending the

signals to the front housing interface board through the DP interface. The front housing interface board converts the DP

signals to LVDS signals through the DP conversion chip to drive the display.

2-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

2.4.3 Display Brightness Control

N22/N19 System

Secondary display

Front interface board (all-in-one or split type)

Main board

Brightness

control

module

Backlight

Current

or voltage

USB&DP

DC-DC board

UART

Power

management

firmware

AC / Power

switching

test

System

software

Firmware of

the front
interface

board

Front interface board (all-in-one or split type)

Firmware of

the front

interface

board

USB&DP

Ambient light

detection

Brightness

control

module

Backlight

Current

or voltage

Ambient light

detection

The physical architecture is as shown below:

As shown in the figure above, the dashed line indicates the fast hardware channel reserved for the AC battery switching

event.

During operation, the system software adjusts the display brightness of the primary screen or secondary screen by

directly sending command to the primary screen or secondary screen, and the CPU within the primary screen or

secondary screen adjusts the backlight accordingly.

When using AC power supply, the main unit automatically identifies the power switch if the power switches to the

battery in case of sudden AC power off. The main unit sends command to the primary screen, and the brightness of the

primary screen is set down automatically.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-11

2.4.4 Module Initialization

I nsert MPM into SMR

The modul e rack upl oads t he modul e

availability status

The system identifies the status and sends

the handshake command

Query for 1 minute continuously until

su ccess is achiev ed .

Check status self test

Status self test succeeded

Parameter configuration

Configurati on s ucceede d

The dev ice oper at es proper ly

Modul e fa ilure

Modul e fa ilure

Modul e fa ilure

Parameter module power-on sequence:

Power-on description using MPM, N1, or T1 as an example:

2-12 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3 Testing and Maintenance

3.1 Introduction

To ensure the patient monitor always functions properly, 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

 All tests should be performed by qualified service personnel only.

 Care should be taken when changing the settings in Maintenance and Configuration menus to avoid loss of

data.

 Service personnel should possess a working knowledge of the test tools and make sure that test equipment

and cables are applicable.

3.1.1 Test Equipment

Required Test Equipment is listed in the specific test procedure.

3.1.2 Preventative Maintenance

The following sections provide a list of recommended preventative maintenance procedures. It is recommended to

verify accuracy and calibrate the patient monitor as needed at least once every two years (and once a year for CO

AG modules). See the following sections for detailed test procedures and contents.

and

2

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-1

3.1.3 Recommended Frequency

Check/Maintenance Item Frequency

Preventative Maintenance Tests

Visual inspection When first installed or reinstalled.

NIBP tests

Sidestream and

Microstream CO

tests

2

AG tests

Performance Tests

ECG tests

Resp test

SpO2 test

NIBP test

Temp test

IBP tests

C.O. test

Sidestream and

Microstream CO

tests

2

Pressure check

Leakage test

Leakage test

Performance test

Calibration

Performance test

Calibration

Performance test

Calibration

Pressure check

Leakage test

Performance test

Pressure calibration

Leakage test

Performance test

Calibration

Leakage test

1. If the user suspects that the measurement is incorrect.

2. Following any repair or replacement of relevant module.

3. For NIBP module, at least once every two years; for CO2 and AG

modules, once a year.

4. AG leakage test should be performed before AG measurement.

1. If the user suspects that the measurement is incorrect.

2. Following any repair or replacement of relevant module.

3. At least once every two years. For CO

AG and NMT modules, at

2,

least once a year.

4. AG leakage test should be performed before AG measurement.

AG tests

Performance test

Calibration

EEG test

BIS test

Interconnecting function

CCO/SvO2 tests

Output calibration

Performance test

NMT tests

Sensor check

Nurse call relay performance test

Analog output performance test

If the user suspects that the nurse call or analog output does not

function properly.

3-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Electrical Safety Tests

Earth impedance

Electrical safety tests

Earth leakage test

Patient leakage current

Patient auxiliary current

Other Tests

Power on test

Recorder check Following any repair or replacement of the recorder.

1. Following any repair or replacement of the power module.

2. When the patient monitor is dropped.

3. At least every two years or as required.

1. When first installed or reinstalled.

2. Following any maintenance or the replacement of any main unit

parts.

Network print test

Device integration check

Function test

Battery check

Performance test

Mounting check

Note: Performance test is not required for the rSO

and the ScvO

needs to be calibrated prior to use.

2

1. When first installed.

2. Whenever the printer is serviced or replaced.

1. When first installed.

2. Following any repair or replacement of the external device.

1. When first installed.

2. Whenever a battery is replaced.

Once every two months or when the battery run time is reduced

significantly.

1. When first installed.

2. At least every two years or as required.

, and ScvO2 modules, because the rSO2, modules perform self tests,

2

3.2 Preventative Maintenance Procedures

3.2.1 Visual Inspection

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, display screen, buttons, knobs, and handle for obvious signs of damage.
 Inspect the SMR and parameter modules for obvious signs of damage.
 Inspect the power cord, bracket and module accessories for obvious signs of 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.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-3

3.2.2 NIBP Tests

3.2.2.1 Leakage Test

Tools required:

 NIBP cuff for adult patient
 NIBP hose
 Cylinder

Follow this procedure to perform the test:

1. Set Patient Category to Adult.

2. Connect the NIBP cuff to the NIBP connector on the patient monitor.

3. Wrap the cuff around the rigid cylinder as shown below.

Monit

Hose

NIBP connector

4. Select Main Menu → Maintenance → enter the required password → Module → NIBP → NIBP Leakage

Test. The message NIBP Leakage Test is displayed in the NIBP parameter area.

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

6. If no message is displayed in the NIBP parameter area, it indicates that the system has no leak. If the message

NIBP Airway Leak is displayed, it indicates that the system may have a leak. In this case, verify the connections

and make sure that the NIBP cuff, hose, and connectors are not leaking. Then, perform the test again.

You can also perform a manual leakage test:

1. Perform steps 1-4 in the 1.2.2.2 NIBP Accuracy Test section.

2. Raise the pressure in the rigid vessel to 250 mmHg with the squeeze bulb. Then, wait for 5 seconds until the

measured values become stable.

3. Record the current pressure value and meanwhile count time with a timer. Then, record the pressure value after

counting to 60 seconds.

Cylinder

Cuff

4. Compare the two values and make sure the difference is not greater than 6 mmHg.

3-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3.2.2.2 NIBP Accuracy Test

Squeeze bulb

Tools required:

 T-shape connector
 Tubing
 Squeeze bulb
 Rigid vessel with 500 ± 25 ml internal volume
 Reference manometer (calibrated with accuracy equal to or greater than 1 mmHg)

Follow this procedure to perform the test:

1. Connect the equipment as shown below.

Monitor

Tubing

NIBP connector

2. Before inflation, the reading on the manometer should be zero. If not, open the valve of the squeeze bulb to let

the whole airway open to the atmosphere. Close the valve after the reading turns to zero.

3. Select Main Menu → Maintenance → enter the required password → Module → NIBP → NIBP Accuracy

Test.

4. Check the reading of the manometer and the reading of the patient monitor. Both should be 0 mmHg.

5. Raise the pressure in the rigid vessel to 50 mmHg with the squeeze bulb. Then, wait for 10 seconds until the

measured values become stable.

6. Compare the reading of the manometer with the reading of the patient monitor. The difference should be 3

mmHg or less. If it is greater than 3 mmHg, contact your service personnel.

Manometer

Rigid vessel

7. Raise the pressure in the rigid vessel to 200 mmHg with the squeeze bulb. Then, wait for 10 seconds until the

measured values become stable. Repeat step 6.

NOTE

 You can use an NIBP simulator to replace the squeeze bulb and the reference manometer to

perform the test.

 You can use an appropriate cylinder and a cuff instead of the rigid vessel.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-5

3.2.3 Sidestream and Microstream CO

Leakage Test

1. Plug the module into the module rack.

Tests

2

2. Wait until CO

your finger or a pinched sample line). The sidestream and microstream CO

 Sidestream: Plug the sidestream CO

the module warmup is finished and then completely block the gas inlet of the module (you may use a

pneumatic plug or your finger to manually occlude the port). An alarm message CO2 Airway Occluded will

appear on the screen. Block the gas inlet for another 60 seconds. Select Main Menu → Maintenance →

enter the required password → Module → CO2 → Calibration. If the flow rate is less than 10 ml/min and

the alarm message continues, it indicates that the module does not leak. If the alarm message CO2 Airway

Occluded disappears, or the flow rate is greater than or equal to 10 ml/min, it indicates that the module

leaks.

 Microstream: After 3 seconds, the alarm message "CO

inlet for another 30 seconds. If the alarm message "CO

module does not leak.

Accuracy Test

Tools required:

 For microstream CO

21.0% O2 and balance gas N2 (P/N 0075-00-0033-01) o r a st e e l ga s cylin d er w it h: 

2 warmup is finished and then completely block the gas inlet of the module or water trap (by using

2 modules will behave as follows:

module into the module rack of the main unit. Wait one minute until

2

Purging" is displayed on the screen. Block the gas

2

Airway Occluded" is displayed, it indicates that the

2

module and sidestream CO2 module without O2 module, a gas cylinder with 5±0.03% CO2,

2

 CO2 concentration 3% - 7 % 
 a / c ≤ 0 .0 1 (w h e r e a = a b s o lu te g a s c o n c e n t r a t io n a c c u ra c y , c = g a s c o n c e n t r a tio n ) 
 balance gas N2

 For sidestream CO

module with O2 module equipped, a steel gas cylinder (P/N 0075-00-0048-01) with 6% CO2, 4%

2

Desflurane, 45% N2O, and 45% O2,

 T-shape connector
 Tubing
 Flowmeter

1. Plug the module into the module rack.

2. Wait until the CO2 module warmup is finished. Check the airway for leak and perform a leakage test as well to

make sure that the airway has no leak.

3. Select Main Menu → Maintenance → enter the required password → Module → CO2.

4. Connect the test system as follows:

3-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Flowmeter

Tubing

Relief valve

T-shape connector

Monitor

Gas cylinder

5. Open the relief valve, and adjust it until the flowmeter has a stable reading between

10 ml/min and 50 ml/min.

6. Verify that the real-time CO

value is within 6±0.2% in the CO2 Maintenance menu (for microstream CO2, the

2

value is 45±2 mmHg).

7. Replace the cylinder to the steel gas cylinder with >40% O

module with O

±3% (80%≤O

module equipped) and verify that the real-time O2 value error is within ±2% (when O2≤80%) or

2

≤100%).

2

Calibration

Tools required:

 For microstream CO

module and sidestream CO2 module without O2 module, a gas cylinder with 5±0.03% CO2,

2

21.0% O2 and balance gas N2 (P/N 0075-00-0033-01) or a st e e l ga s cylin d e r wit h: 

 CO2 concentration 3% - 7 % 
 a / c ≤ 0 .0 1 (w h e r e a = a b s o lu te g a s c o n c e n t r a t io n a c c u ra c y , c = g a s c o n c e n t r a tio n ) 
 balance gas N2

 For sidestream CO

module with O2 module equipped, a steel gas cylinder (P/N 0075-00-0048-01) with 6% CO2, 4%

2

Desflurane, 45% N2O, and 45% O2,

 T-shape connector

and balance gas N2(applicable to sidestream CO2

2

 Tubing
 Flowmeter

1. Make sure that the sidestream or microstream CO

module has been warmed up or started up.

2

2. Check the airway for leaks and perform a leakage test as well to make sure that the airway has no leakage.

3. Select Main Menu → Maintenance → enter the required password → Module → CO2.

4. In the CO2 Maintenance menu, select Zero.

5. After the zero calibration is finished successfully, connect the equipment as follows:

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-7

Flowmeter

Tubing

Relief valve

Monitor

T-shape connector

Gas cylinder

6. Open the relief valve, and adjust it until the flowmeter has a stable reading between

10 ml/min and 50 ml/min.

7. In the Calibrate CO2 menu, select 6% (the CO

concentration) for CO2 calibration. The measured CO2

2

concentration is displayed.

8. After the measured CO

concentration becomes stable, select Calibrate CO2 to calibrate the CO2 module.

2

9. Replace the cylinder to the steel gas cylinder with >40% O2 and balance gas N2 (applicable to sidestream CO2

module with O2 module equipped) and calibrate O2.

If the calibration is finished successfully, the message Calibration Completed! is displayed in the Calibrate CO2 menu. If

the calibration failed, the message Calibration Failed! is displayed. In this case, check whether the operations are

correct and perform another calibration. If the calibration fails several times, return the module to Mindray for repair.

3.2.4 AG Tests

Leakage Test

1. Plug the AG module into the module rack.

2. Wait until the AG module warmup is finished and then completely block the gas inlet of the AG module (you may

use a pneumatic plug or your finger to manually occlude the port). An alarm message AG Airway Occluded will

appear on the screen.

3. Block the gas inlet for another 60 seconds. Select Main Menu → Maintenance → enter the required password

→ Module → AG → Calibration. Check that the flow rate is less than 10 ml/min. If the alarm message

continues, it indicates that the module does not leak.

If the alarm message disappears, or the flow rate is greater than or equal to 10 ml/min, it indicates that the module

leaks.

Accuracy Test

Tools required:

 Gas cylinder with a certain standard gas (such as 6±0.05% CO2, Bal N

) or standard gas mixture. Gas

2

concentration should meet the following requirements: AA > 1.5%, CO2 > 1.5%, N2O > 40%, O2 > 40%, of which

3-8 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

AA represents an anesthetic agent. Precision requirement: a/c ≤ 0.01 (a is the gas absolute concentration

accuracy; c is the gas concentration)

 T-shape connector
 Tubing
 Flowmeter

1. Plug the AG module into the module rack.

2. Wait at least 10 min and then perform a leakage test to make sure that the airway has no leakage.

3. Connect the test system as follows:

Flowmeter

Tubing

Relief valve

T-shape connector

Monitor

Gas cylinder

4. Open the relief valve, and adjust it until the flowmeter has a stable reading between 10 ml/min and 50 ml/min.

5. Verify that the concentration of each composition meets the specification stated in the Operator's Manual.

Calibration

Tools required:

 A supply of medical grade 100% O2 and an anesthetic calibration gas (4% Desflurane, 6% CO2, 45% N2O, Bal O2,

P/N: 0075-00-0048-01 and flow regulator P/N: 0119-00-0235). Gas concentration should meet the following

requirements:

 AA ≥ 1.5%, CO2 ≥ 1.5%, N2O ≥ 40%, O2 ≥ 40%, of which AA represents an anesthetic agent.
 a/c ≤ 0.01 (a is the gas absolute concentration accuracy; c is the gas concentration)

 T-shape connector
 Tubing

Follow this procedure to perform a calibration:

1. Select Main Menu → Maintenance → enter the required password → Module → AG.

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

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-9

 Vent the sampling tubing to the air and check if the Current Flow Rate and Set Flow Rate 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.

 Perform a leakage test to make sure that the airway has no leakage.

3. Connect the test system as follows:

4. Open the relief valve and vent a certain standard gas or gas mixture. Adjust the relief valve until the flowmeter

has a stable reading between 10 ml/min and 50 ml/min.

Flowmeter

Tubing

Relief valve

T shape connector

Monitor

Gas cylinder

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 within tolerance, a

calibration is not needed.

 If the difference is not within tolerance, a calibration should be performed. Select Calibrate.

6. Enter the vented gas concentration. If you use only one gas for calibration, set other gases' concentration to 0. If

the calibration is performed for all gases, the gas with an entered calibration value of 0 is not

calibrated.

7. Select Calibrate to start a calibration.

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

the message Calibration Failed! is displayed. In this case, perform another calibration. If the calibration fails

several times, return the module to Mindray for repair.

CAUTION

 Calibrate the O

module, if it has been transported for long distance.

2

3-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

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. Connect the patient monitor to the AC mains. The AC mains LED and battery LED light up.

2. Press the power on/off switch to switch on the patient monitor. The system sounds a beep indicating the self test

on alarm sounds is passed. The alarm lamps light red, yellow and cyan respectively, and then go off, indicating

the self test on alarm sound is passed.

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

3.4 Module Performance Tests

3.4.1 ECG Tests

ECG Performance Test

Tools required:

 Medsim300B patient simulator or other equivalent simulator

1. Connect the patient simulator with the ECG module using an ECG cable.

2. Set the patient simulator as follows: ECG sinus rhythm, HR = 60 bpm with the amplitude as 1 mV.

3. Verify that the ECG waves are displayed correctly without noise and the displayed HR value is within 60±1 bpm.

4. Disconnect each of the leads in turn and observe the corresponding lead off message displayed on the screen.

5. Set the output of the simulator to deliver a paced signal and set Paced to Yes on the monitor. Check the pace

pulse marks on the monitor screen.

ECG Verification

Tools required: vernier caliper

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

2. Select Main Menu →Maintenance → enter the required password → Module..

3. Select

4. Compare the amplitude of the square wave with that of the scale. The difference should be with 5%.

5. After completing the calibration, select Stop Calibration.

If necessary, you can print out the square wave and wave scale through the recorder and then measure the difference.

Calibration. A square wave appears on the screen and the message "ECG Calibrating" is displayed.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-11

3.4.2 Resp Test

Tools required:

 Medsim300B patient simulator or other equivalent simulator

1. Connect the patient simulator to the module using a non ESU-proof cable and set lead II as the respiration lead.

2. Configure the simulator as follows: lead II as the respiration lead, base impedance line as 500 Ω; delta impedance

as 1 Ω, respiration rate as 20 rpm.

3. Verify that the Resp wave is displayed without any distortion and the displayed Resp value is within 20±1 rpm.

3.4.3 SpO

Tools required:

 None.

1. Connect SpO2 sensor to the SpO2 connector of the monitor. Set Patient Category to Adult and PR Source to SpO2

Test

2

on the monitor.

2. Apply the SpO

sensor to the ring finger of a healthy person.

2

3. Check the Pleth wave and PR reading on the screen and make sure that the displayed SpO2 is within 95%

and100%.

4. Remove the SpO

sensor from your finger and make sure that an alarm of SpO2 Sensor Off is triggered.

2

Measurement accuracy verification:

The SpO

accuracy of the MPM module has been verified in human experiments by comparing with arterial blood

2

sample reference measured with a CO-oximeter. Pulse oximeter measurements are statistically distributed and about

two-thirds of the measurements are expected to come within the specified accuracy range compared to CO-oximeter

measurements.

NOTE

 A simulator cannot be used to assess the accuracy of a pulse oximeter monitor or a SpO

sensor. Instead, it can only verify that whether the monitor is functional. The accuracy of a

pulse oximeter monitor or a SpO2 sensor needs to be verified by clinical data.

2

3.4.4 NIBP Tests

See section 3.2.2NIBP Tests.

3-12 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3.4.5 Temp Test

Tools required:

 Resistance box (with accuracy above 0.1 Ω)

1. Connect the two pins of any Temp connector of a module to the two ends of the resistance box using two wires.

2. Set the resistance box to 1354.9 Ω (corresponding temperature is 37ºC).

3. Verify each Temp channel of the monitor and make sure that the displayed value is within 37±0.1ºC.

4. Repeat steps 1 to 3 to verify each Temp channel of the monitor.

3.4.6 IBP Tests

Performance Test

Tools required:

 Patient simulator Medsim300B, MPS450, or other equivalent equipment
 Dedicated IBP adapter cable (P/N 00-002199-00 for 300B, P/N 00-002198-00 for MPS450)

1. Connect the patient simulator to the monitor's IBP connector.

2. Set the patient simulator output to the IBP channel to 0 mmHg.

3. Press the Zero key on the module to make a zero calibration.

4. Set static pressure to 200 mmHg on the patient simulator.

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

6. If the error is beyond ±2 mmHg, calibrate the IBP module. If the IBP module was calibrated with a dedicated

reusable IBP sensor, check the calibration together with this IBP sensor.

7. Make the patient simulator outputs 120/80 mmHg ART signals and 120/0 mmHg LV signals respectively to each

IBP channel and check that the IBP wave is displayed correctly.

8. Repeat the preceding steps to test all IBP channels.

Pressure Calibration

Method 1:

Tools required:

 Medsim300B patient simulator, MPS450, or other equivalent equipment
 Dedicated IBP adapter cable (300B, P/N 00-002199-00) (use P/N 00-002198-00, if the simulator is MPS450)

1. Connect the patient simulator to the monitor's IBP connector.

2. Set the patient simulator to 0 pressure for the desired IBP channel.

3. Press the Zero key from the IBP menu.

4. Set static pressure to 200 mmHg on the patient simulator.

5. Select Main Menu → Maintenance → enter the required password → Module → IBP.

6. Set the calibration value to 200 mmHg.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-13

7. Select the Calibrate button next to the desired IBP channel to start a calibration.

8. If the calibration is completed successfully, the message Calibration Completed! will be displayed. Otherwise, a

corresponding message will be displayed.

Method 2:

Tools required:

 Standard sphygmomanometer
 Squeeze bulb
 Tubing
 T-shape connector

1. Connect the 3-way stopcock, the sphygmomanometer and the squeeze bulb through a T-shape connector, as

shown below.

2. Zero the transducer, and then open the stopcock to the sphygmomanometer.

Pressure transducer

3-way stopcock

Pressure adapter cable

T-shape connector

Sphygmomanometer

3. Select Main Menu→ Maintenance → enter the required password → Module → IBP. In the displayed

interface, set the target calibration value of the target channel. Value range: 80 to 300 mmHg.

4. Inflate using the squeeze bulb until the reading of sphygmomanometer approximates the preset calibration

value.

5. Adjust the calibration value in the IBP Maintenance menu until it is equal to the reading of sphygmomanometer

6. Select the Calibrate button next to the desired IBP channel to start a calibration.

If the calibration is completed successfully, the message Calibration Completed! will be displayed. Otherwise, a

corresponding message will be displayed.

IBP

module

3-14 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3.4.7 C.O. Test

Tools required:

 Medsim300B patient simulator or other equivalent simulator
 C.O. adapter box (for 300B)

1. Connect the patient simulator to the C.O. module using a C.O. main cable.

2. Set the blood temperature (BT) to 37ºC on the patient simulator and check the temperature value is 37±0.1ºC.

3. Switch off Auto TI and adjust TI (IT) to 24ºC. Select C.O. Measure to enter the C.O. measurement window and set

Comp. Const. to 0.595.

4. Set the injectate temperature to 24ºC and the C.O. to 5 L/min on the C.O. simulator. Select Start in the C.O.

measurement window to start C.O. measurements, and press the run key on the simulator after 3-10 seconds.

6. Verify that the C.O. value is 5±0.25 L/min.

3.4.8 Sidestream and Microstream CO

See section 3.2.3Sidestream and Microstream CO2 Tests.

Tests

2

3.4.9 AG Tests

See section 3.2.4AG Tests.

3.4.10 EEG Test

You can choose either of the following methods to perform the test:

Method 1:

Tools required:

 ECG simulator with Sine wave output function.

1. Connect pins of EEG lead wires to an ECG simulator.

Set the ECG simulator to output Sine wave and frequency to between 0.5 and 30Hz. The range is 2mV. The GND pin of

EEG module connects to RL of ECG simulator. The A+ pin of EEG module connects to LA of ECG simulator. The other

pins of EEG lead wires connect to any ECG lead as you wish.

2. Open the EEG setting menu on monitor, Set the Scale of EEG to be 2000uV. Then you can find a Sine wave on

screen of Patient Monitor.

Method 2:

Tools required:

 None.

Connect all the pins of EEG lead wire together, for example, you can connect them to some metal materials. Then

check the EEG module resistance test, if all the leads are green then pass.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-15

Method 3:

Tools required:

 Resistance box
 Multimeter

1. Connect the EEG module/cable to the EEG simulator and the monitor.

2. Set Montage Type: Bipolar Mode.

3. Adjust the resistance box to 1 kΩ, verify the resistance value displayed on the monitor is 1kΩ.

4. Test the lead type of the monitor to B+, C+ and D+ respectively instead of lead A+.

5. Set Montage Type: Monopolar Mode , then repeat the step 3~4.

3-16 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3.4.11 BIS Test

You can choose either of the following methods to perform the test:

Method 1:

Tools required:

 None.

1. Connect the BIS sensor to a healthy, wide-awake adult as directed in the Operator's Manual.

2. Check the EEG wave and BIS numerics displayed on the screen and make sure the BIS value is within 80 and 100.

Method 2:

Tools required:

 BIS simulator (Covidien PN: 186-0137)

1. Connect the BIS sensor with the BIS simulator. Select BIS area parameter or waveform to access BIS Setup. Then,

select Sensor Check to perform a cyclic impedance check.

2. After the cyclic impedance check is finished, check that the result for each electrode is passed.

Method 3:

Tools:

 Signal generator, （Maker: NF, Model:WF1946B）
 Covidien Signal simulator (Covidien PN:189-0137)

1. Insert the BIS module to the monitor, connect the BIS module/cable to the Covidien Signal simulator, signal

generator.

2. Adjust the signal generator to produce a 90Hz, 35.4mV(RMS) sine signal to the Convidien Signal simulator.

3. Set the time length of the review window to the shortest.

4. Verify the EMG value range from 65 to 75, and SQI value should be 100 displayed on Graphic Trends.

3.4.12 CCO/SvO

Tests

2

Interconnecting Function

Tools required:

 None.

1. Connect and set the patient monitor and Vigilance monitor per the procedures in the Operator's Manual.

2. Set the Vigilance monitor to Demo mode. Start the CCO and SvO2 tests in Demo mode.

3. Verify that the CCO/SvO2 numerics displayed on the patient monitor and Vigilance monitor are consistent.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-17

Output Performance

Tools required:

Multimeter

1. Connect the signal output end of the connecting cables of the CCO/SvO

module to the oscilloscope.

2

2. Select CCO Setup → Signal Output Setup and then select Simulated High Value from the pop-up menu. Check

that the amplitude of electrical level at the signal output port of ECG, MAP, CVP and SpO

are 5±0.015 V, 5±0.25 V,

2

5±0.25 V and 10±0.5 V respectively.

3.4.13 NMT Tests

Performance Test

Method 1:

Tools required:

 Resistance box
 Multimeter

1. Set the resistance value to 1kOhm. Connect the stimulation electrodes to the two wiring terminals.

2. Set the multimeter to operate in DC mode. Connect the multimeter sensors to the NMT stimulation electrodes,

making sure that the sensor and electrode connected have the same polarity.

3. Insert the NMT module into the module rack of the monitor. Select the NMT parameter area of the monitor to

access the NMT Setup menu. Set the Stimulation Current to Supra(60mA). Set the Pulse Width to 300μs. Perform

a PTC measurement.

4. Check the voltage change detected by the multimeter and verify normal output of NMT stimulation.

Method 2:

Tools required:

 Resistance box (0~9999.9 Ω)
 Oscilloscope (Agilent DS0-X3014A)

1. Set resistance box to 1kOhm, connect stimulation electrodes to the resistance box.

2. Insert the NMT module to monitor. Set [Stimulation current] to [Supra (35mA)], [Pulse width] to 200μs. Select [ST

Mode] in NMT setup menu to start a ST measure.

3. Measure the voltage wave of the resistance box by oscilloscope, verify the pulse width is range from 180 to 220us,

and calculate the Stimulation Current according stimulation voltage should be range from 33 to 37mA.

3-18 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Sensor Check

Tools required: None.

1. Connect the patient monitor, NMT module, and NMT accessories.

2. Select Main Menu → Maintenance → enter the required password → Module → NMT.

3. Follow the on-screen instructions to check the NMT sensor.

If sensor check completes successfully, the message Test passed. The function of NMT sensor is OK is displayed,

indicating a functional sensor. If the check fails, check whether the sensor is placed correctly as instructed, and

perform the sensor check again.

NOTE

 Stop NMT measurement or calibration before starting NMT sensor check.

 Avoid forcefully striking the sensor.

3.5 Nurse Call Relay Performance Test

Tools required: Multimeter

1. Connect the nurse call cable to the Nurse Call Connector of the patient monitor.

2. Enter Demo mode. Then, select Main Menu → Maintenance >> → enter the required password → Alarm to

access the Nurse Call setup menu.

3. In Nurse Call menu, select all options of Alarm Priority and Alarm Type. and set Contact Type to Normally Open.

4. In Nurse Call menu, set Signal Type to Pulse. Cause the monitor to generate an alarm and verify the output are

pulses of 1s width and the relay contacts are closed (can be measured with a multimeter) when there is an alarm.

5. In Nurse Call menu, set Signal Type to Continuous. Cause the monitor to generate an alarm and verify the output

is continuous high level and the relay contacts are closed (can be measured with a multimeter) when there is an

alarm.

3.6 Analog Output Performance Test

Tools required:

 Patient simulator
 Oscilloscope

1. Connect the patient simulator to the monitor using an ECG or IBP cable and connect the oscilloscope to the

Auxiliary Output Connector of the MPM module of the patient monitor.

2. Verify that the waves displayed on the oscilloscope are identical with those displayed on the monitor.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-19

3.7 Electrical Safety Tests

WARNING

 Electrical safety tests are a proven means of detecting abnormalities that, if undetected, could prove

dangerous to either the patient or the operator.

 All tests can be performed using commercially available safety analyzer test equipment. Maintenance

personnel shall ensure the adaptability, functional completeness and safety of these pieces of test

equipment, and be familiar with their usage.

 Electrical safety tests shall comply with the following standards: IEC 60601-1 and ANSI/AAMI ES60601-1.

 In case of other stipulations in local laws and regulations, implement electrical safety tests by following

relevant stipulations.

 All devices driven by AC power and connected to medical instruments in patient zones must comply with

the IEC 60601-1 standard. And electrical safety tests on these devices must be implemented in accordance

with the test interval of the patient monitor.

 Use certified safety analyzer (for example, UL, CSA or AMAI) as instructed to perform relevant tests.

NOTE

 Electrical safety check shall be performed after repair or routine maintenance. Ensure that all cover boards,

panels and screws are correctly installed before implementing electrical safety tests.

 Electrical safety tests are used to timely detect potential electrical safety risks that might cause damage to

patients, operators or maintenance personnel. Electrical safety tests must be carried out under normal

environmental conditions (that is, normal temperature, humidity and barometric pressure).

See Appendix A Electrical Safety Inspection for electrical safety tests.

3.8 Recorder Check

Tools required:

 None.

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

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

3-20 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

3.9 Network Print Test

NOTE

 HP LaserJet Pro M202dw laser printer is recommended for BeneVision patient monitor series

3.9.1 Device Connection and Setup

1 Connect the patient monitor and network printer to a network switch using common network cables as follows:

BeneVisi

on

Network cable

2 Select Main Menu → Maintenance → enter the required password →Network Setup and set the IP address of

the patient monitor in the same network segment with that of the network printer. (See the instructions for use

accompanying the printer)

3 Select Main Menu → Maintenance → enter the required password → Print and set the IP address of the

printer to the actual IP address, and set the paper size to the actual size.

4 Set the print resolution to 300dpi or 600dpi as required.

5 Click Print Test Page to check whether the output of the printer's test page is normal. If not, recheck the

connection and configuration of the printer.

Network cable

Switch

Network

printer

3.10 Battery Check

Tools required:

 None.

Function Test

1. Verify that the patient monitor works properly when running on AC power.

2. Remove the AC power cord and verify that the patient monitor still works properly.

Performance Test

Perform the test procedure in the Battery section in the Operator's Manual and verify the operating time of the

battery meets the product specification.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3-21

3.11 Mounting Check

Tools required: None.

3.11.1 Safety check

Check the mounting of Patient Monitor is safe.

3.11.2 Overall Test and Check of Installed System

Implement installation test:

The following tests and checks need to be performed after a patient monitor is installed, or reinstalled after being

disassembled and repaired:

 The following tests and checks need to be performed after a patient monitor is installed, or reinstalled after being

disassembled and repaired:

 Check that the screws fastening the bracket and guide rail are not loose.
 Check that the four installation screws on the rear side of the main unit are not loose.
 Check that the main unit and the VESA metal plate are closely attached.
 Check that the connection between stand and bracket is not loose.
 Check that the screws at the installation support leg for fixing fast lock are not loose.
 Check that the fast lock or lock plug at the rear side of the module rack is not loose.
 Check that the modules can be normally and securely inserted into the module rack.
 Check that the trim strip is properly installed after the display is disassembled and repaired.
 Check that the display handle is not loose.
 Check that the length of display wire allows for flexible turn of the display and angle adjustment of the monitor.
 Check that the monitor can be placed at any angle as required.
 Check that the VHM bracket can place the monitor at any height as required.
 Check that the screws on the rotation part of the display are securely installed, and that the damping force is

properly set.

3-22 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

4 Troubleshooting

4.1 Introduction

This chapter lists the problems that may occur during use of the monitor and recommended measures. Refer to the

table in this chapter to check the monitor, confirm and fix these problems. For more information about the

troubleshooting, please contact Mindray service.

4.2 Part Replacement

For the monitor, the PCB, main parts and components can be replaced. For the LCD or touch screen fault, only the

front case assembly can be replaced. Once the faulty PCB is confirmed, replace the PCB according to the operation

guide in Chapter 6 Disassembly and Repair. Then, confirm that the monitor can operate normally and has passed all

the performance tests. For the information about replaceable parts, refer to Chapter 7 Parts.

4.3 Check before Powering on the Monitor

After the AC power supply is connected, check whether the AC indicator is turned on. If not, confirm whether the AC

cable is connected to the socket and monitor reliably. If both the AC external power supply and power cord are

connected normally, but the AC indicator is off, the AC-DC power module or main control board of the main unit may

be damaged. Now, you need to run the monitor on battery powered on. If the monitor cannot be powered on, the

main control board may be damaged or the internal board is abnormal, resulting in power supply protection. If the

monitor can be run on battery power, the AC-DC power module is damaged.

In addition, check the appearance for damages before powering on. Particularly, when the touch screen of the screen

assembly is damaged, stop using the monitor immediately.

4.4 Software Version Check

Some troubleshooting tasks may involve software version compatibility. For information about the configuration and

software version of your patient monitor, contact Mindray service. To check the software version, do as follows:

 Select Main Menu quick key, from the System column, select Version. You can check the version information of

the system software.

 Select Main Menu quick key, from the System column, select Maintenance >> → enter required password →

select Version. In the displayed menu, you can check the version information of the system software and

modules.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-1

4.5 Technical Alarm Check

Remove AC and connect

after 5s, and press the

power-on button

The power LED of the module

rack is ON or the alarm LED of the

front housing is blinking?

Check the
power on

signal cable

of the front

housing

Y

N

Remove AC, and press the

power on/off button for 15s

to restart the system if the

battery is available

Front housing

display

interface board

defective

AC LED is ON?

Power-on button

LED is ON?

Check ACDC, and
the ACDC may be

damaged.

N

N

Battery is provided?

Y

N

The coaxial
cable of the

interface is

damaged

Arranged according to the possible order

Screen line,

screen and

backlight line

defective

Mother

control board

defective

Y

The coaxial
cable of the

display

interface is

damaged

DCDC

board

failure

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 messages, possible causes and

countermeasures, refer to N series Operator’s Manual (P/N: 046-011259-00).

4.6 Blank Screen upon Startup

4-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

4.7 Troubleshooting Guide

4.7.1 Power On/Off Failures

Fault Symptom Possible Cause Countermeasure

Power on failure

AC mains not connected or

insufficient battery power or

battery damaged

Cable defective or improperly

connected

 Verify the AC mains is properly connected.
 Verify the battery capacity is sufficient and

the batter is not damaged.

Verify the cables connecting the power switch and

the LED board to the front housing interface board,

the cable connecting the front housing interface

board to the coaxial cable of main control, and the

cable connecting the power module to the DCDC

board are properly connected.

Note: The process for the coaxial cable connecting

the front housing interface board and the main

control is complicated; therefore, protective

measures must be adopted during installation to

prevent the coaxial cable from being damaged.

2. Verify the cables and connectors are not damaged.

Power switch & LED board defective Replace the power switch & LED board.

Power module defective Replace the power module.

Motherboard failure Replace the motherboard.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-3

4.7.2 Display Failures

Fault Symptom Possible Cause Countermeasure

Blank screen, but the

patient monitor still

operates normally

Secondary screen

does not function

Cable defective or improperly connected 1. Verify the cable connecting the power switch and

the LED board to the front housing interface board,

the cable connecting the front housing interface

board to the coaxial cable of main control, and the

cable connecting the power module to the DCDC

board are properly connected.

2. Verify the connecting cables and connectors are

not damaged.

LCD defective Replace the LCD.

Cable defective or improperly connected 1. Verify the cable connecting the display DP1

connector and the patient monitor is properly

connected.

2. Verify the cables and connectors are not

damaged.

DP cable of the secondary screen is not

inserted into the connector of the main unit

when the system is powered on

Switch of the secondary screen is in the

power off state

Power off the main unit. Connect the DP cable of the

secondary screen to the main unit. Then restart the

main unit.

Press the power-on button of the secondary screen

for 5s to start the secondary screen.

Touchscreen does not

respond

Touchscreen disabled

Cable defective or improperly connected 1. Verify the cables connecting the touchscreen to

Touchscreen control board defective Replace the touchscreen control board.

Front housing interface board failure

Check if there is a symbol shown above the

Main Menu QuickKey. If yes, press Main Menu for

more than 3s to enable the touchscreen.

the touchscreen control board, the cable connecting

the touchscreen control board to the front housing

interface board, and the cable connecting the front

housing interface board to the main board are

properly connected.

2. Verify the cables and connectors are properly

connected

Replace the front housing interface board.

4-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

4.7.3 Module Rack Failures

Failure Description Possible Cause Troubleshooting

The cable connecting SMR and the main unit of the



monitor is not connected properly or already

External cable defective or

poorly connected

Defective parameter

module

damaged. Verify the connecting cables and

connectors are not damaged.



Verify that contact screws on SMR or module are

tightly fastened and well connected.

Replace the malfunctioning parameter module with a

known good module. If the patient monitor identifies

the replacement module and can start measurement, it

indicates that the original module is faulty.

SMR cannot identify

parameter modules

Wrong communication

board software version

Upgrade the module and/or the SMR software to a

compatible level.

Check whether the SMR interface output voltage of



the main unit is 12 V. If it is abnormal, the internal

SMR power supply

abnormal

module rack COM board or main control board fails.

Check whether the contact screw output voltage of



the external module rack is 12 V. If it is abnormal,

the communication module on the SMR fails.

8-slot Module rack

communication board

defective

DCDC board failure Replace the DCDC board.

Replace 8-slot the module rack communication board.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-5

4.7.4 Alarm Failures

Fault Symptom Possible Cause Countermeasure

Alarm LED off or cannot be

turned off while the audible

alarm is sounding

No audible alarm sounds

emitted while the alarm LED

is normal

Cable defective or improperly

connected

Alarm LED board failure Replace the alarm LED board.

Front housing interface board failure Replace the front housing interface board.

Main board failure Replace the main board.

Audible alarm disabled

Cable defective or improperly

connected

Speaker failure Replace the speaker.

1. Verify the cable connecting the alarm LED board to

the front housing interface board, and the cable

connecting the front housing interface board to the

main board are properly connected.

2. Verify the cables and connectors are not damaged.

Select the Main Menu quick key, from the System

column, select Maintenance → enter required

password → select Alarm, set Minimum Alarm

Volume to a proper value. Select the Main Menu

quick key, from the Alarm column, select Setup,

adjust the alarm volume to a proper value.

1. Verify the cable connecting the speaker to the

main board is properly connected.

2. Verify the cables and connectors are not damaged.

Main board failure Replace the main board.

4-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

4.7.5 Output Interface Failures

Fault Symptom Possible Cause Countermeasure

No output for the nurse call DCDC interface board cable loose 1. Verify the cable connecting the DCDC interface

board to the main board is properly connected.

2. Verify the cables and connectors are not

damaged.

DCDC interface board damaged Replace the DCDC interface board.

Main board failure Replace the main board.

USB Device Unusable

USB enumeration failure Restart the system.

Cable defective or improperly

connected

USB Hub board failure Replace the USB Hub board.

Main board failure Replace the main board.

1. Verify the cable connecting the USB Hub board to

the main board is properly connected.

2. Verify the cables and connectors are not

damaged.

4.7.6 Power Supply Failures

Fault Symptom Possible Cause Countermeasure

Battery cannot supply

power

Battery damaged Replace the battery.

Cable defective or improperly

connected

DCDC interface board damaged Replace the DCDC interface board.

1. Verify the cable connecting the battery interface

board to the power module is correctly connected.

2. Verify the cables and connectors are not

damaged.

Battery cannot be recharged Battery damaged Replace the battery and charge fully. If this is

successful, the original battery is faulty.

Cable defective or improperly

connected

DCDC interface board damaged Replace the DCDC interface board.

No +3.3 V output

No +5.0 V output

No +12 V output

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-7

1. Power supply protected

2. DCDC interface board damaged

1. Verify the cable connecting the battery interface

board to the DCDC interface board is correctly

connected.

2. Verify the cables and connectors are not

damaged.

1. Turn off the patient monitor then restart it.

2. If the problem persists, disconnect the AC mains

for 5s and reconnect it, and then restart the patient

monitor.

3. If the problem persists, replace the DCDC interface

board.

NOTE

 When the power module fails, it may cause damage to other components, e.g. the monitor suddenly fails

during start-up, due to supply protection. In this case, troubleshoot the power module by following the

procedure described in the table above.

 Components of the main unit, SMR and parameter modules are powered by the power module. In the event

that a component malfunctions, verify the operating voltage is correct. Refer to Chapter 2 Theory of

Operation for the operating voltage and measurement points for each component.

4.7.7 Network Related Problems

Fault Symptom Possible Cause Countermeasure

Frequent dropouts or

network disconnects

The patient monitor is

connected to a network but

cannot view other patients

in the View Others mode

Improper network cable connection Check for network cable connection and length

(should not exceed 50 m).

Incorrect IP configuration Check for IP conflict in the network and reset the IP

address.

Improper network cable connection Check for network cable connection and length

(should not exceed 50 m).

Too many simultaneous requests for

viewing the patient monitor

Incorrect IP configuration Check for IP conflict in the network and reset the IP

Incorrect network settings Verify the wireless network settings are correct.

Antenna not installed properly Verify the antenna for the wireless network card is

Wireless module damaged Replace the wireless module.

Main control board failure Replace the main control board.

Antenna not installed properly Verify the antenna for the MPAN module is installed

One monitor could only be observed by eight

monitors simultaneously, and the observing

requests not within the range would not be handled.

address.

connected to the wireless module reliably.

properly.

MPAN module damaged Replace the MPAN module.

Satellite module rack (SMR) COM

board defective

Wrong software version for the

MPAN module

4-8 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Replace the SMR COM board.

Upgrade the MPAN module software.

4.7.8 Device Integration Failures

Failure Description Possible Cause Troubleshooting

 Replace the ID adapter.

The ID adapter is not compatible



Upgrade the ID of the ID adapter in

"Factory Maintenance" menu.

Replace the serial port adapter cable.

The "Devices Integrated"

window displays nothing

after connection

with the external device

The serial port adapter cable not

compatible with the external device

Wrong software version or wrong

protocol version of the external

device

Generate the alarm:

"BeneLink Comm Stop"

The patient monitor has

no response when loading

the ID adapter

The BeneLink module application

software is corrupted

The BeneLink module application

software is corrupted

BeneLink module damaged Replace the module.

Verify the protocol version and software version

are supported by the ID adapter.

Upgrade or update the software application of

the BeneLink module with the network

upgrading tool.

Upgrade or update the software application of

the BeneLink module with the network

upgrading tool.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 4-9

FOR YOUR NOTES

4-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

5 Hardware Configuration Options

5.1 Overview

This monitor supports optional monitoring parameter function modules, optional functional assemblies, and network

upgrade of software.

NOTE

 For function upgrade involving disassembly of the monitor, eliminate static electricity before

the disassembly. When removing some parts with the electrostatic sensitive mark, wear

protective devices such as electrostatic ring or anti-electrostatic gloves, lest the parts would be

damaged.

 Properly connect and route the cables and wires when reassembling the equipment to avoid

pinched hoses and electrical short circuits.

 Use specified screws to reassemble the equipment. If the incorrect screws are forcefully

tightened, the equipment may be damaged and the screws or part may fall off during use,

causing unpredictable equipment damage or human injury.

 Be sure to follow the correct sequence when disassembling the monitor.
 Before removing assemblies, make sure that all the connection lines have been unplugged.

During removal, note to avoid breaking the connection line by pulling or damaging the

connector.

 Place the removed screws and other parts separately by category so that they can be used in

the reinstallation. Do not drop, contaminate or lose them.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 5-1

5.2 Optional Parameter Function Modules

You can install the following parameter modules:

Parameter Module Part No. Description

MPM module 115-056534-00 MPM-2 module (Masimo SpO2/3/5 lead ECG/IBP, FRU)

115-056535-00 MPM-3 module (Nellcor SpO2/3/5 lead ECG/IBP, FRU)

115-056536-00 MPM-8 module (Nellcor SpO2/3/5 lead, FRU)

115-056537-00 MPM-9 module (Nellcor SpO2/3/5 lead, FRU)

115-056538-00 MPM-14 module (Nellcor SpO2/12 lead ECG/IBP/Analog, FRU)

115-056539-00

IBP module 115-047286-00 IBP module

C.O. module 115-047285-00 C.O. upgrade package, no accessory

CO2 module 115-013201-00 ORIDION CO2 (package, no accessory)

115-056530-00 1-Slot CO2 module

115-056531-00 1-Slot CO2/O2 module

AG module 115-056533-00 2-Slot AG/O2 module

115-056532-00 2-Slot AG/O2/BIS module

BIS module 115-013194-00 BIS module (Package, no accessory)

RM module 115-047015-00 RM module

SPO2 module 115-056529-00 Masimo SpO2 module

115-034088-00 Nellcor SpO2 module (package, no accessory)

CCO/SvO2 module 115-013196-00 CCO/SvO2 module (Package, no accessory)

ScvO2 module 115-013199-00 SCVO2 module (Package, no accessory)

EEG module 115-018353-00 EEG module (Package, no accessory)

NMT module 115-020916-00 NMT module (Package, no accessory)

Benelink module 115-053710-00 BeneLink module package

rSO2 module 115-037264-00 rSO2module

TEMP module 115-039492-00 Temp module (package, no accessory)

Recorder module 115-053716-00 Recorder module

You can insert and remove all the parameter modules during patient monitoring.

For how to insert and remove parameter modules, see BeneVision N series Patient Monitor Operator’s Manual (PN:

046-011259-00).

MPM-15 module (Masimo SpO2/12 lead ECG/IBP/Analog output,

FRU)

5-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

5.3 Optional Functional Assemblies

You can configure the following functional assemblies for this monitor:

Functional Assembly Part No. Description

115-033887-00

Satellite module rack

009-005122-00 Cable connecting the monitor and the SMR, 10 m

8-slot satellite module rack (SMR), with handle, hook, and 2

m cable

115-044994-00

115-044993-00

115-044997-00

Secondary display

115-044996-00

115-049288-00

115-049289-00

Split unit 115-051379-00 Split accessory material package (with the rotation function)

Wi-Fi 115-033755-00 Wi-Fi material package

115-034030-00 Handle assembly (without encoder)

Handle assembly

115-037270-00 Handle assembly (with an encoder)

22” secondary display (including the AC adapter and 2.3 m

cable)

22” secondary display (including the AC adapter and 10 m

cable)

19” secondary display (including the AC adapter and 2.3 m

cable)

19” secondary display (including the AC adapter and 10 m

cable)

22” secondary display (including the AC adapter and 5 m

cable)

19” secondary display (including the AC adapter and 5 m

cable)

Main unit battery 115-034132-00 Battery

iView module 115-055522-00 iView module package

Remote controller kit 115-045643-00 Remote controller kit

115-039575-00 2D Barcode scanner (USB) kit

2D barcode scanner

115-039635-00 2D Barcode scanner (support RFID) kit

This monitor is configured with wireless network functions and can be connected to network through wireless AP.

Contact Mindray Technical Support for assistance in connecting to a network.

5.3.1 Installing an SMR

The SMR can be connected to the patient monitor through the SMR connector via the SMR cable. For details, see

BeneVision N Series Patient Monitor Operator’s Manual (PN: 046-011259-00).

5.3.2 Installing an Secondary Display

To implement normal operation, use the video cable connection line to connect the secondary display to the

secondary display interface of monitor, connect the power supply, and turn on the secondary display. For details, see

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 5-3

NOTE

BeneVision N Series Patient Monitor Operator’s Manual (PN: 046-011259-00).

5.3.3 Upgrading Split Unit

Split unit assembly: Refer the corresponding section of this manual to split the integrated monitor into split type

monitor.

For details, see BeneVision N Series Patient Monitor Operator’s Manual (PN: 046-011259-00).

5.3.4 Setting up Wireless Network Functions

Installation and connection to a Wireless Network should be performed by Mindray Service.

5.3.5 Upgrading Handle Assembly

Refer to the corresponding section of this manual to install the handle assembly in your patient monitor.

5.3.6 Installing the Main Unit Battery

Refer to the corresponding section of this manual to install the main unit battery in your patient monitor.

5.3.7 Upgrading iView System Functions

Refer to the corresponding section of this manual to install the iView system function assembly in your patient

monitor.

 During installation of the Main Unit Battery, iViewthe interface cover needs to be temporarily

removed while installing the corresponding functional assembly in your monitor.

 During installation of the handle, the corresponding handle cover needs to be replaced with

the handle..

5-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

NOTE

6 Disassembly and Repair

6.1 Tools

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

 Phillips screwdrivers
 Tweezers
 Needle nose pliers
 Cutting pliers
 Flat-bladed screwdriver

6.2 Preparations for Disassembly

Before disassembling the monitor, make following preparations:

 Stop monitoring the patient, turn off the monitor and disconnect all the accessories and peripheral devices.
 Disconnect the AC power supply then remove the battery. Before taking out the battery, remove the main unit

housing.

6.3 Whole Unit Disassembly

 Before disassembly, make sure that the work surface is clean, smooth and free of debris that could cause

damage to the touchscreen.

 All disassembly and repairs should only be performed by qualified service personnel using anti static

precautions.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-1

Captive screw
M4

Cord clamp

6.3.1 Disassembling Display and Main Unit (Main Unit and Display Integrated

Installation)

As shown in the following picture, place the monitor face down on the work surface, loosen two M3 captive screws, and

then lift the main unit housing to remove it.

As shown in the following picture, loosen to remove four M4X55 screws, lift the main unit slowly, disconnect the DP

cable, power cable and cord clamp, and separate the main unit from the display.

×55 screw

Power Cable

DP Cable

6-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

M3 screw
M3 screw

6.3.2 Removing Handle/Encoder (Optional Encoder)

As shown in the following picture, loosen two captive screws, unplug the encoder cable, then remove the handle assembly;
loosen and remove the M3X6 cross recessed pan head screws with pad, then remove the encoder assembly.

As shown in the following picture, loosen and remove the two M3X6 cross recessed pan head screws with pad, then

remove the keypad board assembly; then,disconnect the cable, loosen and remove the cross recessed pan head screws

with pad, then remove the encoder assembly.

M3 screw

As shown in the following picture, remove the Encoder Knob by pushing it off the Encoder shaft from the back with a

small punch through the access hole. Use a pair of needle nose pliers to loosen the encoder nut, then remove the

encoder.

Encoder shaft

Access hole

Cable

M3 screw

Encoder knob

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-3

Captive screw

M3 screw

6.3.3 Removing Handle Cover

As shown in the following picture, place the monitor face down on the work surface, open the USB retaining cover,

loosen and remove one M3X6 screw, and thenremove the handle cover.

USB retaining cover

6.3.4 Removing Main Unit Housing/Main Unit Interface Adapter Board (Main Unit and

Display Separated Installation)

As shown in the following picture, place the monitor face down on the work surface, loosen two M3 captive screws, and

then lift the main unit housing to remove it.

As shown in the following picture, turn the Main Unit over then, loosen and remove the two M3X6 cross recessed pan

head screws with pad, disconnect the cable, then remove the cover for separated installation adapter of main unit.

Cable

6-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

M3 screw

M3 screw

Pry open the gap

Cable

As shown in the following picture, loosen and remove the three M3X6 cross recessed pan head screws with pad, and

remove the adapter board cover of main unit; loosen and remove one M3X6 cross recessed pan head screw with pad,

then remove the main unit interface adapter board.

6.3.5 Removing Display Interface Adapter Board (Main Unit and Display Separated

Installation)

As shown in the following picture, use a flat-bladed screwdriver to pry open the display adapter cover plate, disconnect

the power cable and VP (video output) cable, then remove the display interface cover plate.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-5

NOTE

M3 screw

M3 screw

As shown in the following picture, loosen and remove the two M3X6 cross recessed pan head screws with pad, then

remove the display interface adapter board.

6.4 Disassembling Display (Capacitive Touchscreen)

 Before disassembly, make sure that the point for placement is smooth and free of unrelated things, and

pave foam or similar material under the display, lest the touchscreen would be scratched.

 When optional functions are indicated, the related operations may be involved if this function is selected for

the machine; otherwise, the related operations are not involved.

6.4.1 Removing Display Rear Housing Assembly (D19)

As shown in the following picture, loosen and remove the six M3X6 cross recessed pan head screws with pad.

6-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

M3 screw

cable

M3 screw

6.4.2 Removing Display Rear Housing Assembly (D22)

As shown in the following picture, loosen and remove the eight M3X6 cross recessed pan head screws with pad.

6.4.3 Removing Switch Keypad Board

As shown in the following picture, disconnect the switch keypad board cable.

As shown in the following picture, loosen and remove the two M3X6 cross recessed pan head screws with pad, then

remove the switch keypad board assembly.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-7

6.4.4 Removing Display Interface Board/Touchscreen Panel

As shown in the following picture, loosen and remove the six M3X6 cross recessed pan head screws with pad,

disconnect the cables, then remove the display interface board.

Cable

M3 screw

Cable

Cable

As shown in the following picture, disconnect the touchscreen cable. Loosen and remove the two M3X6 cross

recessed pan head screws, then remove the touchscreen panel.

M3 screws

Cable

6-8 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

6.4.5 Removing USB Board

M3 screw

Spring screw
M3 screw

As shown in the following picture, loosen and remove the four spring screws and four M3X6 cross recessed pan head

screws with pad, then remove the main bracket.

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, then

remove the USB board.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-9

6.4.6 Removing LED Board/Indicator Board

M3 screw

M3screw

M3 screw

As shown in the following picture, loosen and remove the two M3X6 cross recessed pan head screws with pad, then

remove the indicator board.

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, then

remove the LED board.

6.5 Disassembling Main Unit

6.5.1 Removing iView Assembly (iView Assembly Optional)

As shown in the following picture, loosen and remove the two M3X6 cross recessed pan head screws with pad, then

remove the iView assembly.

6-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

6.5.2 Removing iView Assembly Support Board/USB Interface Board (iView Assembly

M3 screw

USB board

Support board

M3 screw

Optional)

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, then

remove the iView assembly.

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, then

remove the USB board; remove the four M3X6 cross recessed pan head screws with pad, then remove the support board.

6.5.3 Removing Battery

As shown in the following picture, use a flat-bladed screwdriver to remove the battery cover, and then remove the

battery.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-11

6.5.4 Removing ACDC Power Board

M3 screw

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, and

remove the upper cover of main unit.

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad,

disconnect the power cable, then remove the ACDC power board.

M3 screw

Cable

6-12 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

6.5.5 Removing DCDC Power Management Board

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, and

disconnect the power cable.

Cable

M3 screw

As shown in the following picture, loosen and remove the six small M2.5 pan head screws, then remove the DCDC power

management board.

M2.5 screw

6.5.6 Removing Antenna Module and Antenna Cable

As shown in the following picture, disconnect the antenna cable from the Wi-Fi module, then remove the antenna

module and antenna cable.

Disconnect the cable

Antenna module

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-13

Antenna cable

6.5.7 Removing SSD Hard Disk

As shown in the following picture, remove the SSD hard disk.

SSD disk

6.5.8 Removing Main Control Board

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, remove

the button battery from it’s holder, then remove the main control board.

Cable

M3 screw

6-14 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

M3X8 screw

6.5.9 Removing Battery Backplane

As shown in the following picture, loosen and remove the four M3X6 cross recessed pan head screws with pad, then

remove the battery cavity assembly; remove the two M3X6 cross recessed pan head screws with pad, then remove the

battery backplane.

M3 screw

M3 screw

6.6 Disassembling the Module Rack

6.6.1 Disasembling the Handle and Hooks

As shown in the following figure, loosen and remove the eight M3X10 cross recessed countersunk head screws, and

remove the hooks.

M3X10 screw

As shown in the following figure, loosen and remove the three M3×8 cross recessed countersunk head screws, and

remove the handle.

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-15

6.6.2 Disassembling the Rear Case of Module Rack

As shown in the following figure, use a tweezer to take out the six screw covers on the rear case, loosen and remove the

six M3X16 cross recessed pan head screw, and separate the front case from the rear case.

Screw cover

M3X16 screw

6.6.3 Disassembling the Module Rack Interface Board

Loosen and remove the two M3X8 cross recessed pan head screws, disconnect the cable between the interface board

and the infrared backplane, and then remove the interface board.

M3X8 screw

Cable from the interface board of

external module rack to the 8-slot board

6-16 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Module rack antenna

6.6.4 Disassembling the Infrared Backplane of Module Rack

Disconnect the cable between the module rack antenna and the infrared backplane, loosen and remove the seven

M3X8 cross recessed pan head screws on the infrared backplane, then remove the eight POGO PIN silicon cases of

module rack.

M3X6 screw

POGO PIN silicon cases of

module rack

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-17

6.7 Disassembling the M51C Module

6.7.1 Disassembling the Front Panel Assembly

As shown in the figure, use a contact wrench to remove the screw for the back end terminal of the module; use a small

flat-bladed screwdriver to remove the module retention tabs; use a Phillips screwdriver to remove the front panel screw.

Then, the front panel of module can be pulled out.

Use a contact wrench to

remove the terminal screw

As shown in the following figure, loosen and remove the screw between the front panel and the bracket, and unplug the

air tube at the air nozzle. Then the front panel can be removed.

Retention Tabs

Remove the screw

Remove the bracket

screw

6.7.2 Disassembling the Parameter Board

As shown in the following figure, loosen and remove theparameter board screws, remove the pump and valve cable

and NIBP air tube. Then, the parameter board can be removed.

Parameter board screws and

cable

Remove along this direction

6-18 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Remove the screws here

Pull out from this end

Cut the
cable

Release the clip

Disconnect power lines

6.7.3 Disassembling the SpO2 board

As shown in the following figure, remove the SpO2 board screws, and then remove the blood oxygen board.

6.7.4 Disassembling the Infrared Board

As shown in the following figure, disconnect the infrared board cable, and then remove the infrared board.

6.7.5 Removing the Pump and Valve

Cut the cable tie, disconnect the pump power cable and NIBP air tube, and then remove the pump.
disconnect the valve power cable and NIBP air tube, use a flat-bladed screwdriver to release the clips on the sides of the
valve, and then remove the valve assembly.

s

ties

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 6-19

FOR YOUR NOTES

6-20 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7 Parts

7.1 Main Unit

7.1.1 Exploded View

7.1.2 Parts List

ITEM NO. Description Qty FRU part number

1 Cable protection belt 1 /

2 WiFi antenna 2.4GHz and 5GHz dual frequencies 1 024-000717-00

3 Main unit base assembly 1 115-037485-00

4 IVIEW module 1 115-049593-00

5 DP port decoration cover 1 043-005815-01

6

7 Rack female receptacle waterproof jacket 1 /

8 Power plug anti-pull hook 1 /

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-1

Small cross recessed pan head screw GB/T823-1988 M2.5X6

plated with green color zinc

6 /

ITEM NO. Description Qty FRU part number

9 Main control board PCBA Bay-Trail E3827 2GDDR 1 115-037490-00

10

11 Main unit interface and DC-DC board PCBA 1 115-037491-00

12 Main unit FPGA heat conducting pad 1 /

13 AC-DC heat conducting pad 3 1 /

14 AC-DC heat conducting pad 2 1 /

15 N22_N19 main unit label (Chinese) 1 /

16 Main unit housing waterproof foam 3

18 CAPTIVE-SCREW 2

19 Main unit housing 1

17 USB port decoration cover 1 043-009126-00

20

21 AC-DC heat conducting pad 1 /

22 Upper cover of main unit 1 044-000660-00

23 Power supply 90-264VAC 16V/10A 1 022-000249-00

24

25 Cable fixing. Viscose type fixing base GCF-063 2 /

26 ACDC insulating sheet 1 1 /

27

28 Battery cavity assembly 1 /

29 Main unit interface adapting assembly 1 /

30 Lithium battery 11.3V 5600mAh LI23I003A 1 115-034132-00

31 Main unit battery door (overmold) 1 043-006168-00

Signal cable from the main control board to the main unit

interface and DC board

Stainless steel cross recessed pan head screw GB9074.1-88

M4X55 with pad, passivated

Power cord from the main control board to the main unit

interface and DCDC board

Small cross recessed pan head GB9074.5-88 M3X6 with pad

and plated with green color zinc

1 009-005098-00

115-037486-00

4 /

1 009-004996-00

25 /

7-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7.2 D19 Display Assembly (Capacitive Screen)

7.2.1 Exploded View

7.2.2 Parts List

ITEM NO. Description Qty FRU part number

1 19“LCD Touch Screen UV 1

2 19-inch LCD backlight cable 1 009-005113-00

3 DIB to PCB 1 009-006879-00

4 19-inch LCD LVDS signal cable 1 009-005110-00

5 1 9inch vertical LED board PCBA 1 051-001925-01

6 19 inch horizontal LED board PCBA 1 051-001924-00

7

8 D19 main bracket 1 /

D19 LCD transfer bracket 2

D19 touchscreen plate-1/ D19touchscreen adhesive-1 1

D19touchscreen plate-2/ D19touchscreen adhesive-2 1

D19touchscreen plate-3/ D19touchscreen adhesive-3 1

D19touchscreen plate-4/ D19touchscreen adhesive-4 1

D19 cosmetic gasket 1

Tape for display gasket 0.04

Small cross recessed pan head GB9074.5-88 M3X6

with pad

Small cross recessed pan head GB9074.5-88 M3X6

with pad

4

28

115-045001-00

/

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-3

ITEM NO. Description Qty FRU part number

9 Display interface board PCBA (FRU) 1 115-044999-00

10 Alarm LED board interconnection line 1 009-005109-00

Speaker bracket 1

11

Speaker pad 1

12 D19 rear housing 1 043-005820-02

13

14 Encoder assmebly 1 115-050303-00

15 Handle assembly (without an encoder) 1 115-033716-00

16

17 Key seat 1 043-006119-00

18 Switch keypad board PCBA 1 051-001920-00

19 Switch key assembly 1 049-001031-00

20 USB interface board interconnection line 1 009-005106-00

21

22

23 USB interface board PCBA 2 051-001933-01

24 Indicator and light intensity sensor board PCBA 1 051-001918-00

25 Indicator light lamp shade 1 049-000872-00

26 D19 ornamental belt(FRU) 1 115-045003-00

Display rear housing cover assembly 1 043-006465-01

Cable management cover (silkscreen) 1 043-008962-00

Long side handle cover 1

Display USB cover (overmold) 1

Short side handle cover (D19) 1

Display interface board and keypad board

interconnection line

Display interface board and indicator & light sensor

board line

1

1

115-037489-00 Speaker 1

115-035457-00

009-005104-00

009-005124-00

7-4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7.3 D22 Display Assembly (Capacitive Screen)

7.3.1 Exploded View

7.3.2 Parts List

ITEM NO. Description Qty FRU part number

22“LCD Touch Screen UV 1

D22 LCD transfer bracket 2

D22 touchscreen plate -1/ D22 touchscreen adhesive -1 1

D22 touchscreen plate -2/ D22 touchscreen adhesive -2 1

1

D22 touchscreen plate -3/ D22 touchscreen adhesive -3 1

D22 touchscreen plate -4/ D22 touchscreen adhesive -4 1

D22 cosmetic gasket 1

Tape for display gasket 0.04

115-045000-00

Small cross recessed pan head GB9074.5-88 M3X6

with pad

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-5

4

ITEM NO. Description Qty FRU part number

2 22 inch vertical LED board PCBA 1 051-001923-00

3 22 inch horizontal LED board PCBA 1 051-001922-00

4 22 inch LCD backlight cable 1 009-005112-00

5 22-inch LCD LVDS signal cable 1 009-005111-00

Speaker bracket 1

6

Speaker pad 1

7 D22 main bracket 1 042-013329-01

8 Alarm LED board interconnection line 1 009-005109-00

9 Display interface board PCBA (FRU) 1 115-044999-00

10 D22 rear housing 1 043-005871-02

Display rear housing cover assembly 1 043-006465-01

11

Cable management cover (silkscreen) 043-008962-00

12 Encoder assembly 1 115-050303-00

13 Handle assembly (without an encoder) 1 115-033716-00

14 22 inch handle cover kit 2 115-035456-00

15 Key seat 1 043-006119-00

115-037489-00 Speaker 1

16 Switch keypad board PCBA 1 051-001920-00

17 Switch key assembly 1 049-001031-00

18 USB interface board interconnection line 1 009-005106-00

19

20 Heater fix screw 4 041-008273-00

21

22 USB interface board PCBA 2 051-001933-01

23

7-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

Display interface board and keypad board

interconnection line

Display interface board and indicator & light sensor

board line

Small cross recessed pan head GB9074.5-88 M3X6

with pad

1

1

30

009-005104-00

009-005124-00

M04-004012---

ITEM NO. Description Qty FRU part number

24 Indicator and light intensity sensor board PCBA 1 051-001918-00

25 Indicator light lamp shade 1 049-000872-00

26 D22 cosmetic gasket 1 049-000969-01

7.4 Encoder Assembly

7.4.1 Exploded View

7.4.2 Parts List

ITEM NO. Description Qty FRU part number

1 D22 knob 1

2 Encoder interface and keypad board PCBA 1

3 Copper shaft encoder fixing board 1

115-050303-00

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-7

7.5 Module Rack

7.5.1 Exploded View

7.5.2 Parts List

ITEM NO. Description Qty FRU part number

1 Front housing silkscreen of module rack 1 043-008617-00

2 8-slot PCBA of external module rack 1 051-001907-00

3 Interface board fixing sheet metal 1 /

4 Interface board PCBA of external module rack 1 051-001908-00

5 Module rack cuff bracket 1 115-033914-00

6 Rear housing silkscreen of module rack 1 043-008616-00

7

8 Module rack cable hook 1 115-033911-00

Cross recessed pan head screw GB/T818-2000

M3X16 plated with green color zinc

1 /

7-8 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7.6 iVIEW Module

7.6.1 Exploded View

7.6.2 Parts List

ITEM NO. Description Qty FRU part number

1 IVIEW front housing 1 /

2 IVIEW CPU heat conducting pad 1 /

3

4 IVIEW memory heat conducting pad 4 /

5 Computer module Celeron J1900 1 023-001497-00

6 Button battery 1 /

7 iView support board PCBA 051-003028-00

7a SSD 128GB MLC mSata 1 023-001329-00

8 IVIEW rear housing 1 /

9

10 IVIEW network port insulating sheet 1 /

11 Network port insulating sheet 1 /

Cross recessed pan head screw GB/T818-2000 M2X6

plated with green zinc

Cross recessed pan head GB9074.5-88 M3X6 with pad

and plated with green zinc

4 /

4 /

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-9

ITEM NO. Description Qty FRU part number

12

13 iView USB interface board PCBA 1 051-001948-00

14 Conductive foam 2.0*7.0mm 0.06m /

Cross recessed pan head screw GB/T818-2000 M3X4

plated with green zinc

8 /

7.7 Main Unit Separated Installation Auxiliary Accessories

7.7.1 Exploded View

7.7.2 Parts List

ITEM NO. Description Qty FRU part number

1 Adapter board mounting bracket 1 /

2 Main unit interface adapter board PCBA 1 051-001915-00

3

4 Adapter board cover of main unit 1 /

7-10 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

M3X6_GB9074_5 small cross recessed pan head with

pad

4 /

7.8 Main Unit Base Assembly

7.8.1 Exploded View

7.8.2 Parts List

ITEM NO. Description Qty FRU part number

1 Main unit bracket silkscreen 1

2 Main unit bracket waterproof foam 1

3 Antenna fixing frame 1

4 Rubber tube. 1.6mmODX0.8mmID 1

5 Waterproof pad 1

6 Main unit bracket overlay 1

7

8

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-11

Small cross recessed pan head screw assembly

GB/T9074.8 M4X8 plated with green color zinc

Small cross recessed pan head GB9074.5-88 M3X6

with pad and plated with green color zinc

1

1

115-037485-00

ITEM NO. Description Qty FRU part number

9 RTC battery fixing part 1

10 Network port insulating sheet of main unit 1

11 Main unit memory heat conducting pad 2

12 Main unit CPU heat conducting pad 1

13 AC input to ACDC power cord 1

14

15 Grounding pillar 1

16

17 Stainless hex nut GB/T6170-2000 M6 passivated 1

18 Conductive foam 2.0*7.0mm 0.05m

13 AC input to ACDC power cord 1 009-004993-00

Flat washer-Grade A GB/T97.1-2002 6 plated with green

color zinc

Serrated lock washer external teeth GB/T862.2-1987 6

plated with green color zinc

1

1

7-12 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7.9 Battery Cavity Assembly

7.9.1 Exploded View

7.9.2 Parts List

ITEM NO. Description Qty FRU part number

1 Battery cavity 1 051-001932-00

2 6600 battery interface board PCBA 1 043-005814-00

3

Small cross recessed pan head GB9074.5-88 M3X6

with pad and plated with green color zinc

2 /

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 7-13

7.10 M51C Module

7

.10.1 Exploded View

10.2 Parts List

7.

ITEM No. Name and Specification Qty Material Code

M51C-ME, 5L5P, MR/NC-SPO2, IBP, MPM I/F

1

2

3

4 Hex nut and taper lock washer assembly M3 2 M04-011002---

5 M51C module back plane (with IBP/FRU) 1 051-002383-00-00

6 Fixing base 2 /

7

8 Spanner (T8) 2 /

1-14

M51C-ME, 5L5P, Masimo SpO2, IBP, MPM I/F 051-002492-01

M51C-FF (Ext Arr /12 Lead ST /Glasgow_12) 051-002483-00-00

Stainless steel cross recessed pan head screw

GB/T818-2000 M2X4

Masimo SpO2 board

Nellcor SpO2 board 101-000469-00

Cross recessed countersunk head screw

GB/T819.1-2000 M3X6

BeneVision N22/BeneVision N19 Patient Monitor Service Manual

1

4 /

1

2 /

051-002482-01

040-003371-00

ITEM No. Name and Specification Qty Material Code

9 Dual module rear housing (M51C) 1 /

10 Terminal screw 2 /

11 Infrared lens 1 /

12 Standard spring washer GB/T93-1987 3 2 /

13 Barcode serial number label 1 (for module) 1 /

14 High-end Mindray patent label (English) 1 /

15 Pump shock pad 1 /

16

17 Pump. 12VDC with 120 wire and connector 1 082-000862-00

18 Filter. Inline Filter43um 1/8”I.D.Tubing 2 /

19 630F flow restrictor 1 /

20 Silicone tube 11 /

21 Bracket (T8) 1 043-001964-02

22 Module waterproof pad (M51C) 1 /

Air valve. Dual air valve (custom) 12VDC

normally-open line, 125 mm long

2 082-000864-00

23

M51C front panel maintenance package

(Masimo SpO2/IBP/analog FRU)

M51C front panel maintenance package

(Nellcor SpO2/IBP/analog FRU)

M51C front panel maintenance package

(Nellcor SpO2/IBP FRU)

M51C front panel maintenance package

(Masimo SpO2/IBP FRU)

115-057209-00

115-044673-01

1

115-044671-01

115-057562-00

-15 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

7

FOR YOUR NOTES

7-16 BeneVision N22/BeneVision N19 Patient Monitor Service Manual

A Electrical Safety Inspection

The following electrical safety tests are recommended as part of a comprehensive preventive maintenance program.

They are a proven means of detecting abnormalities that, if undetected, could prove dangerous to either the patient or

the operator. Additional tests may be required according to local regulations.

All tests can be performed using commercially available safety analyzer test equipment. Please follow the instructions of

the analyzer manufacturer.

The consistent use of a safety analyzer as a routine step in closing a repair or upgrade is emphasized as a mandatory step

if an approved agency status is to be maintained. The safety analyzer also proves to be an excellent troubleshooting tool

to detect abnormalities of line voltage and grounding, as well as total current loads.

A.1 Power Cord Plug

Test Item Acceptance Criteria

The power plug pins No broken or bent pin. No discolored pins.

The power

plug

The power cord

The plug body No physical damage to the plug body.

The strain relief No physical damage to the strain relief. No plug warmth for device in use.

The power plug No loose connections.

No physical damage to the cord. No deterioration to the cord.

For devices with detachable power cords, inspect the connection at the device also.

For devices with non-detachable power cords, inspect the strain relief at the device.

A.2 Device Enclosure and Accessories

A.2.1 Visual Inspection

Test Item Acceptance Criteria

No physical damage to the enclosure and accessories.

The enclosure and accessories

BeneVision N22/BeneVision N19 Patient Monitor Service Manual A-1

No physical damage to meters, switches, connectors, etc.

No residue of fluid spillage (e.g., water, coffee, chemicals, etc.).

No loose or missing parts (e.g., knobs, dials, terminals, etc.).

A.2.2 Contextual Inspection

Test Item Acceptance Criteria

No unusual noises (e.g., a rattle inside the case).

The enclosure and accessories

No unusual smells (e.g., burning or smoky smells, particularly from ventilation holes).

No taped notes that may suggest device deficiencies or operator concerns.

A.3 Device Labelling

Check the labels provided by the manufacturer or the healthcare facility are present and legible.

 Main unit label
 Integrated warning labels

A.4 Scheduled Electrical Safety Inspection

For scheduled electrical safety inspection, perform all the test items listed in A.6 Electrical Safety Inspection Test.

A.5 Electrical Safety Inspection after Repair

The following table specifies test items to be performed after the equipment is repaired. Refer to A.6 Electrical Safety

Inspection for the description of the test items.

Repair with main unit not disassembled

Repair with main

unit disassembled

When neither power supply PCBA nor

patient electrically-connected PCBA is

repaired or replaced

When power supply PCBA is repaired or

replaced

When patient electrically-connected PCBA is

repaired or replaced

When both power supply PCBA and patient

electrically- connected PCBA are repaired or

replaced

Test items: 1, 2, 3

Test items: 1, 2, 3, 4

Tes t items: 1, 2, 3, 4, 5

Test items: 1, 2, 3, 4, 6, 7, 8

Test items: 1, 2, 3, 4, 5, 6, 7, 8

A-2 BeneVision N22/ BeneVision N19 Patient Monitor Service Manual