Mindray BeneVision N22 User manual

BeneVision N22/BeneVision N19
Patient Monitor
Service Manual

BeneVision N22/BeneVision N19 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 N22/BeneVision N19 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 N22/BeneVision N19 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 N22/BeneVision N19 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 N22/BeneVision N19 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 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 1
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 CO2Tests ....................................................................................................................................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 SpO2Test ........................................................................................................................................................................................... 3-12
3.4.4 NIBP Tests.......................................................................................................................................................................................... 3-12
3.4.5 Temp Test .......................................................................................................................................................................................... 3-13
3.4.6 IBP Tests ............................................................................................................................................................................................. 3-13

2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
3.4.7 C.O. Test..............................................................................................................................................................................................3-15
3.4.8 Mainstream CO2Tests....................................................................................................................................................................3-15
3.4.9 Sidestream and Microstream CO2Tests ..................................................................................................................................3-16
3.4.10 AG Tests............................................................................................................................................................................................3-16
3.4.11 EEG Test............................................................................................................................................................................................3-16
3.4.12 BIS Test .............................................................................................................................................................................................3-18
3.4.13 CCO/SvO2 Tests ..............................................................................................................................................................................3-18
3.4.14 NMT Tests ........................................................................................................................................................................................3-19
3.5 Nurse Call Relay Performance Test.........................................................................................................................................................3-20
3.6 Analog Output Performance Test...........................................................................................................................................................3-20
3.7 Electrical Safety Tests ..................................................................................................................................................................................3-21
3.8 Recorder Check .............................................................................................................................................................................................3-21
3.9 Network Print Test ........................................................................................................................................................................................3-22
3.9.1 Device Connection and Setup...................................................................................................................................................3-22
3.10 Battery Check ..............................................................................................................................................................................................3-22
3.11 Mounting Check.........................................................................................................................................................................................3-23
3.11.1 Safety check ...................................................................................................................................................................................3-23
3.11.2 Overall Test and Check of Installed System ........................................................................................................................3-23
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

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 3
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

4 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
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 Test................................................................................................................................................................A-3

BeneVision N22/BeneVision N19 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.

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

BeneVision N22/BeneVision N19 Patient Monitor Service Manual 2-1
2Operation Theory
2.1 Overview
TheN22/N19 patient monitor provides rich functionality to monitor patient’s vital signs including ECG, Resp, SpO2, Temp,
N I B P, I B P, C O 2, AG, O2, RM, C.O., CCO, ICG, SvO2/ScvO2, BIS, EEG, NMT, tcGas and rSO2. Based on these parameters, the
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.
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.

2-2 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
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
W2
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.

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

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

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

2-6 BeneVision N22/BeneVision N19 Patient Monitor Service Manual
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 Battery driven by yellow
LED /
32 M0_TXD OUT M0 UART sending /
33 Battery_Green OUT Battery driven by green
LED /
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 /