Mindray BeneVision N17 User manual

BeneVision N17/BeneVision N15/
BeneVision N12
Patient Monitor
Service Manual

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual I
Copyright 2018 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.
Release time: July 2018
Revision 3.0

II BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
Intellectual Property Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray) owns the intellectual property
rights to this product and this manual. This manual may refer to information protected by copyrights or patents and
does not convey any license under the patent rights of Mindray, nor the rights of others. Mindray does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Mindray intends to maintain the contents of this manual as confidential information. Disclosure of the information in
this manual in any manner whatsoever without the written permission of Mindray is strictly forbidden. Release,
amendment, reproduction, distribution, rent, adaption and translation of this manual in any manner whatsoever
without the written permission of Mindray is strictly forbidden.
, 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.

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual III
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.
Warranty
Mindray warrants that components within its products will be free from defects in workmanship and materials for a
period of five (5) years from the date of purchase except that disposable or one-time use products are warranted to be
free from defects in workmanship and materials up to a date one year from the date of purchase or the date of first use,
whichever is sooner.
This warranty does not cover consumable items such as, but not limited to, batteries, external cables, and sensors.
Mindray shall not be liable for any incidental, special, or consequential loss, damage, or expense directly or indirectly
arising from the use of its products. Liability under this warranty and the buyer’s exclusive remedy under this warranty is
limited to servicing or replacing the affected products, at Mindray’s option, at the factory or at an authorized distributor,
for any product which shall under normal use and service appear to Mindray to have been defective in material or
workmanship. Recommended preventative maintenance, as prescribed in the service manual, is the responsibility of the
user and is not covered by this warranty.
No agent, employee, or representative of Mindray has any authority to bind Mindray to any affirmation, representation,
or warranty concerning its products, and any affirmation, representation or warranty made by any agent, employee, or
representative shall not be enforceable by buyer or user.
THIS WARRANTY IS EXPRESSLY IN LIEU OF, AND MINDRAY EXPRESSLY DISCLAIMS, ANY OTHER EXPRESS OR IMPLIED
WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR A
PARTICULAR PURPOSE, AND OF ANY OTHER OBLIGATION ON THE PART OF MINDRAY.
Damage to any product or parts through misuse, neglect, accident, or by affixing any non-standard accessory
attachments, or by any customer modification voids this warranty. Mindray makes no warranty whatsoever in regard to
trade accessories, such being subject to the warranty of their respective manufacturers.
A condition of this warranty is that the equipment or accessories which are claimed to be defective be returned when
authorized, freight prepaid to Mindray DS USA, Inc., 800 MacArthur Blvd, Mahwah, NJ 07430 or its authorized
representative. Mindray shall not have any responsibility in the event of loss or damage in transit.

IV BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
Exemptions
Mindray's obligation or liability under this warranty does not include any transportation or other charges or liability for
direct, indirect or consequential damages or delay resulting from the improper use or application of the product or the
use of parts or accessories not approved by Mindray or repairs by people other than Mindray authorized personnel.
This warranty does not extend to:
Malfunction or damage caused by improper use or man-made failure.
Malfunction or damage caused by unstable or out-of-range power input.
Malfunction or damage caused by force majeure events, such as (i) flood, fire and earthquake or other similar
elements of nature or acts of God; (ii) riots, war, civil disorders, rebellions, or revolutions in any country; or (iii) any
other cause beyond the reasonable control of Mindray.
Malfunction or damage caused by improper operation or repair by unqualified or unauthorized service people.
Malfunction of the instrument or part whose serial number is not legible.
Others not caused by instrument or part itself.
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 N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual V
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: Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
Address: Mindray Building, Keji 12th Road South, High-tech Industrial Park, Nanshan, Shenzhen
518057 P.R. China
Tel: [phone]
Fax: [phone]
Website: www.mindray.com
Distributor: Mindray DS USA, Inc.
Address: 800 MacArthur Boulevard, Mahwah, New Jersey 07430 USA
Tel: [phone]
Website: www.mindray.com

VI BeneVision N17/BeneVision N15/BeneVision N12 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 N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 1
Contents
1 Safety ................................................................................................................................................................................. 1-1
1.1 Safety Information..........................................................................................................................................................................................1-1
1.1.1 DANGER................................................................................................................................................................................................1-1
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 Main Control Board ..........................................................................................................................................................................2-2
2.2.2 Internal Module Rack COM Board...............................................................................................................................................2-3
2.2.3 Power Architecture...........................................................................................................................................................................2-3
2.2.4 Independent Display Board (for the N17 Only) .....................................................................................................................2-4
2.2.5 iView Module (for the N17 Only).................................................................................................................................................2-4
2.2.6 Alarm LAMP Board ...........................................................................................................................................................................2-4
2.2.7 Power Switch Board .........................................................................................................................................................................2-4
2.3 Data Logic Flow ...............................................................................................................................................................................................2-4
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
3.1.4 Visual Inspection ...............................................................................................................................................................................3-3
3.1.5 NIBP Tests.............................................................................................................................................................................................3-4
3.1.6 Sidestream and Microstream CO2Tests ....................................................................................................................................3-6
3.1.7 AG Tests ................................................................................................................................................................................................3-8
3.2 Power On Test................................................................................................................................................................................................ 3-11
3.3 Module Performance Tests....................................................................................................................................................................... 3-11
3.3.1 ECG Tests ........................................................................................................................................................................................... 3-11
3.3.2 Resp Performance Test................................................................................................................................................................. 3-12
3.3.3 SpO2Test ........................................................................................................................................................................................... 3-12
3.3.4 NIBP Tests.......................................................................................................................................................................................... 3-13
3.3.5 Temp Test .......................................................................................................................................................................................... 3-13
3.3.6 IBP Tests............................................................................................................................................................................................. 3-13
3.3.7 C.O. Test ............................................................................................................................................................................................. 3-15
3.3.8 Mainstream CO2Tests ................................................................................................................................................................... 3-15
3.3.9 Sidestream and Microstream CO2Tests ................................................................................................................................. 3-16
3.3.10 AG Tests........................................................................................................................................................................................... 3-16
3.3.11 EEG Test........................................................................................................................................................................................... 3-16
3.3.12 BIS Test............................................................................................................................................................................................. 3-18

2 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
3.3.13 CCO/SvO2 Tests ..............................................................................................................................................................................3-19
3.3.14 NMT Tests ........................................................................................................................................................................................3-19
3.4 Nurse Call Relay Performance Test .........................................................................................................................................................3-21
3.5 Analog Output Performance Test...........................................................................................................................................................3-21
3.6 Electrical Safety Tests ..................................................................................................................................................................................3-22
3.7 Recorder Check .............................................................................................................................................................................................3-23
3.8 Network Print Test ........................................................................................................................................................................................3-23
3.8.1 Device Connection and Setup...................................................................................................................................................3-23
3.9 Battery Check.................................................................................................................................................................................................3-24
3.10 Mounting Check.........................................................................................................................................................................................3-24
3.10.1 Safety check ...................................................................................................................................................................................3-24
3.10.2 Overall Test and Check of Installed System ........................................................................................................................3-24
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 Troubleshooting Guide ................................................................................................................................................................................4-2
4.6.1 Power On/Off Failures.....................................................................................................................................................................4-2
4.6.2 Display Failures..................................................................................................................................................................................4-3
4.6.3 Module Rack Failures ......................................................................................................................................................................4-4
4.6.4 Alarm Failures ....................................................................................................................................................................................4-5
4.6.5 Output Interface Failures...............................................................................................................................................................4-6
4.6.6 Power Supply Failures.....................................................................................................................................................................4-7
4.6.7 Network Related Problems ...........................................................................................................................................................4-7
4.6.8 Device Integration Failures ........................................................................................................................................................... 4-8
4.6.9 Recorder 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 Setting up Wireless Network Functions ................................................................................................................................... 5-3
5.3.3 Upgrading Recorder........................................................................................................................................................................5-4
5.3.4 Upgrading iView System................................................................................................................................................................ 5-4
5.3.5 Upgrading Independent Display Function ............................................................................................................................. 5-4
6 Repair and Disassembly.................................................................................................................................................... 6-1
6.1 Tools.....................................................................................................................................................................................................................6-1
6.2 Preparations for Disassembly.....................................................................................................................................................................6-1
6.3 Main Unit Disassembly ................................................................................................................................................................................. 6-2
6.3.1 Basic Disassembly.............................................................................................................................................................................6-2
6.3.2 Disconnecting the Base .................................................................................................................................................................6-3

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 3
6.3.3 Separating the Front and Rear Half of the Monitor..............................................................................................................6-4
6.4 Further Disassembly of the Front Case Assembly...............................................................................................................................6-7
6.4.1 Removing the Power Switch Board............................................................................................................................................6-7
6.4.2 Removing the Alarm Lamp and Light Sensor Board............................................................................................................6-7
6.4.3 Removing the Screen Assembly Cables ...................................................................................................................................6-8
6.5 Further Disassembly of the Rear Case Assembly ................................................................................................................................6-9
6.5.1 Removing the Recorder..................................................................................................................................................................6-9
6.5.2 Further Disassembly of the Recorder ........................................................................................................................................6-9
6.5.3 Removing the Bluetooth Board................................................................................................................................................ 6-11
6.5.4 Removing the Wi-Fi Module ...................................................................................................................................................... 6-12
6.5.5 Removing the Internal Module Rack Assembly.................................................................................................................. 6-13
6.5.6 Removing the Main Support Assembly (N12& N15)......................................................................................................... 6-16
6.5.7 Removing the iView Board Assembly (N17)......................................................................................................................... 6-20
6.5.8 Removing the Independent Display Board Assembly (N17 Series)............................................................................. 6-22
6.5.9 Removing the Handle .................................................................................................................................................................. 6-23
6.6 Further Disassembly of the Base Assembly........................................................................................................................................ 6-24
6.7 Disassembling the Module Rack ............................................................................................................................................................ 6-25
6.8 Disassembling the MPM Module ........................................................................................................................................................... 6-28
7 Parts ................................................................................................................................................................................... 7-1
7.1 N12 Parts............................................................................................................................................................................................................7-1
7.1.1 N12 Whole Unit..................................................................................................................................................................................7-1
7.1.2 N12-NLT Front Housing Assembly..............................................................................................................................................7-2
7.1.3 N12-Sharp Front Housing Assembly..........................................................................................................................................7-3
7.1.4 N12 Rear Housing.............................................................................................................................................................................7-4
7.1.5 N12 Rear Housing Assembly (FRU)(115-044499-00)............................................................................................................7-6
7.1.6 N12 Battery Cavity Assembly (FRU)(115-044504-00)...........................................................................................................7-7
7.1.7 N12 Module Rack Body Assembly (FRU) (115-044507-00) ................................................................................................7-8
7.2 N 15 Parts...........................................................................................................................................................................................................7-9
7.2.1 N15 Whole Unit..................................................................................................................................................................................7-9
7.2.2 N15-NLT Front Housing Assembly........................................................................................................................................... 7-10
7.2.3 N15-Sharp Front Housing ........................................................................................................................................................... 7-11
7.2.4 N15 Rear Housing.......................................................................................................................................................................... 7-12
7.2.5 N15 Rear Housing Assembly (FRU) (115-044541-00) ..................................................................................................... 7-14
7.2.6 N15 Base Assembly (FRU)(115-044543-00) .......................................................................................................................... 7-15
7.2.7 N15N17 Module Rack Body Assembly (FRU) (115-044546-00) ..................................................................................... 7-16
7.3 N17 Parts......................................................................................................................................................................................................... 7-17
7.3.1 N17 Whole Unit............................................................................................................................................................................... 7-17
7.3.2 N17-NLT Front Housing Assembly........................................................................................................................................... 7-18
7.3.3 N17-Sharp Front Housing ........................................................................................................................................................... 7-19
7.3.4 N17 Rear Housing.......................................................................................................................................................................... 7-20
7.3.5 N17 Rear Housing Assembly (FRU)( 115-044548-00)........................................................................................................ 7-22
7.3.6 N17 Base Assembly (FRU) (115-044550-00) ......................................................................................................................... 7-23
7.3.7 Independent Display Upgrade Package (115-044554-00).............................................................................................. 7-24
7.3.8 Independent Display Assembly................................................................................................................................................ 7-25
7.3.9 iView Module Assembly (115-050002-00) ............................................................................................................................ 7-26

4 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
7.4 External Satellite Module Rack (SMR) ...................................................................................................................................................7-27
7.4.1 Exploded View .................................................................................................................................................................................7-27
7.4.2 Parts List.............................................................................................................................................................................................7-27
7.5 M51C Module.................................................................................................................................................................................................7-28
7.5.1 Exploded View .................................................................................................................................................................................7-28
7.5.2 Parts List.............................................................................................................................................................................................7-28
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 Test................................................................................................................................................................A-3

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 1-1
1Safety
1.1 Safety Information
DANGER
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.
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.

1-2 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service 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.

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 2-1
2Operation Theory
2.1 Overview
As a bedside workstation for multi-parameter monitoring, the N series can provide the complete patient
management, abundant physiological parameter monitoring and physiological alarm functions, as well
the powerful data review function and the flexible wired and wireless network configuration and
application capabilities. The third-party application can be accessed easily through the iView application,
meeting the increasingly common information requirements of hospitals. The provided series of CAA
applications can help doctors to make auxiliary diagnosis for patients. Meanwhile, the N series provide the
hospital management personnel with more excellent monitor management applications, rendering
assistance in fixing the efficiency and quality problems during monitor equipment management of
hospitals.
The N series provide the product models with display screens of different sizes according to the demand
of clinical application. In addition to touch screen operations, the user can use the mouse and keyboard to
operate the monitor. The N series can connect to multiple display screens to function as mirror screens or
extension screens.
The series of products are compatible with the BeneView T series plug-in modules and related accessory
products. They can work together with the TDS to implement the intra-hospital transfer application of
patients.
In comparison with the BeneView T series products, the N series boast better human-computer
interaction design and clinical applicability, more complete IT solution capability of hospitals, and more
abundant CDS applications.
2.2 Product System Architecture
All the N17/N15/N12 monitors have only one main unit:
The N12 main unit uses the 12.1” TFT WXGA display screen.
The N15 main unit uses the 15.6” TFT FHD display screen.
The N17 main unit uses the 18.5”TFT FHD display screen.
All of them use the touch screen as an input device and can extend the mouse, keyboard and
remote control.
An internal module rack is integrated, with 4 slots (N12) or 6 slots (N15/N17).
The MPAN and WiFi modules are optional.
The built-in recorder is optional.
The N15/N17 can connect to the external module rack and TDS; the N12 can connect to the
TDS.

2-2 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
Main control board
LCD
iView assembly
（N17 Optional）
DVI RJ45 2*USB 2*USB
Power switch
board
Alarm lamp
board
MPAN module
(Optional)
TP control
board
AC/DC
module
Battery interface
board
(N15/N17)
Recorder
(Optional)
Speaker
Battery
Front
shell
Back
shell
AC/DC
interface
2*USB 2*USB DVI RJ45
WiFi module
(Optional)
Independent display board
（N17 Optional）
DVI
Internal module com board（4slots/6slots）
4/6*Module
communication
interface
Nurse call
interface SMR
interface
Bottom
shell
Battery interface
board
(N12/N12C) Battery
Figure 2-1 System block diagram of the N17/N15/N12/N12C
2.2.1 Main Control Board
There are the main control CPU, program memory, data memory, system configuration memory, system
FPGA, WiFi module (optional), power management MCU, battery charging circuit, and DC-DC circuit on
the main control board. The internal interface and external interfaces are also provided on the board. The
internal interface is an interface between the recorder, internal module rack COM board, AC-DC, and the
battery. The external interfaces refer to the DVI display interface, USB interface, and Ethernet interface.
Main Processor
DDR3
Program
Memory
Data Memory
E2ROM
USB hub
Touch-
controller SPI
USB
Audio
codec/AMP
Speaker
Touch panel
Power M0
PHY
WiFi
（optional）
Internal Module
Rack communication
board
RTC
Photo
senseor
Power key board
RJ-45
DVI
interface
USB 4*port
MMC
MMC
RMII1 PHY
Independent
display
board/iView
MPAN Module
E2ROM(funnct
ion cfg)
Nursecall
interface
Alarm light
controller
SMR
Interface
FPGA
（N15/N17）LCD
Back light
driver
DVI
transfer
SPI
UART
LCDC
I2C
I2C
Main
Control
board
Figure 2-2 Diagram of the main control board

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 2-3
2.2.2 Internal Module Rack COM Board
Two models of internal module rack COM boards are available. The N12 uses the 4-slot COM board, and
the N15/N17 uses the 6-slot COM board. The internal module rack COM board is used to provide the
interface for communication with the parameter module, the SMR interface and nurse call interface, and
the MPAN module interface. Besides, the data forwarding FPGA and corresponding power circuit are also
provided on the internal module rack COM board.
2.2.3 Power Architecture
AC/DC
module
100～240V AC AC-DC in
Battery
BAT
charger
switch
M0
DC/DC +12V
DC/DC
LDO
+3.3V_1
VBUS：
9.6～11.1V,
+15V
ON/OFF
ON/OFF
+5V
Power switch
board
+5V/+3.3V +3.3V
Alarm lamp
board
Photo
senseor
Led driver
Recorder
+12V
LCD&TP
+12V
Internal module rock COM
board
iView module
+12V
Independent display
board
+5V
+5V
ON/OFF
+3.3V
DC/DC
DC/DC
+3.3V_2 MPAN module
Figure 2-3 Diagram of power architecture
The AC/DC power module outputs 15V to the main control board, and 3.3V, 5V and 12V can be generated
through the internal DC-DC conversion circuit in the main control board to provide a power supply to
other modules or boards in the main unit. The battery charging circuit is powered by 15V, and the AC
power supply and battery power supply can be switched according to AC on-line detection.
The +12V power supply is provided to the power supply, including the external module rack, and the
DC-DC isolation design is implemented at the module end.
The iVIew assembly uses the power rail Vbus, which is the switching output between the AC-DC output
and battery and aims to avoid abnormal power failure of the iView module and running exception of the
Windows OS running on other modules due to an unexpected power failure of the AC power supply. The
battery supports the main unit to stop the iView module in the normal power-off mode. In the case of
battery power supply, the iView module cannot start.

2-4 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
2.2.4 Independent Display Board (for the N17 Only)
It is used to connect the main unit to a display and extend the main screen display. It adopts the DVI
interface. Moreover, the external display with a touch screen can be supported through the USB interface
of the main unit. At present, the supported display with a touch screen is Elo 1919LM.
2.2.5 iView Module (for the N17 Only)
As an embedded computer module, it provides the following external interfaces: the network interface,
DVI interface, and the USB interface. It can connect to the keyboard, mouse, network cable, and display
independently. The configuration of the iView module is mutually exclusive with that of the independent
display module.
2.2.6 Alarm LAMP Board
The LED alarm lamp and light sensor are provided on the board. The light sensor implements the ambient
light detection and is used to adjust brightness of the LCD background light.
2.2.7 Power Switch Board
There are the power switch and three indicators on the power switch board, which are the AC on-line
indicator, battery indicator, and the power-on indicator.
2.3 Data Logic Flow
Data
collection
Data
forwarding
System
application
Display and
user interface
Data
output
Data storage
Figure 2-4 Data flow diagram
The monitoring parameters are collected and analyzed through the module, and then forwarded to the
system software through the internal or external module rack. The system software displays the waveform,
numerical value and alarm information, and the data, alarm information and numerical value are also
stored in the internal data memory at the same time. Meanwhile, they can also be sent to the central
station or other monitors through the wired or wireless network.

BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual 3-1
3Testing 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 CO2and AG modules). See the following sections for detailed test procedures
and contents.

3-2 BeneVision N17/BeneVision N15/BeneVision N12 Patient Monitor Service Manual
3.1.3 Recommended Frequency
Check/Maintenance Item Frequency
Preventative Maintenance Tests
Visual inspection When first installed or reinstalled.
NIBP tests
Pressure check
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.
Leakage test
Sidestream and
Microstream CO2
tests
Leakage test
Performance test
Calibration
AG tests
Performance test
Calibration
Performance Tests
ECG tests
Performance test
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 CO2, AG and NMT
modules, at least once a year.
4. AG leakage test should be performed before AG
measurement.
Calibration
Resp performance test
SpO2test
NIBP test
Pressure check
Leakage test
Temp test
IBP tests
Performance test
Pressure calibration
C.O. test
Sidestream and
Microstream CO2
tests
Leakage test
Performance test
Calibration
AG tests
Leakage test
Performance test
Calibration
EEG test
BIS test
CCO/SvO2 tests
Interconnecting
function
Output calibration
NMT tests
Performance test
Sensor check