Mindray cPM 12 User manual

Passport 12/Passport 8
cPM 12/cPM 8
Patient Monitor
Service Manual

I
Intellectual Property Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray) owns the intellectual property
rights to this product and this manual. This manual may refer to information protected by copyrights or patents and
does not convey any license under the patent rights of Mindray, nor the rights of others. Mindray does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Mindray intends to maintain the contents of this manual as confidential information. Disclosure of the information in
this manual in any manner whatsoever without the written permission of Mindray is strictly forbidden. Release,
amendment, reproduction, distribution, rent, adaption and translation of this manual in any manner whatsoever
without the written permission of Mindray is strictly forbidden.
, , and are the registered trademarks or trademarks owned by Mindray in China
and other countries. All other trademarks that appear in this manual are used only for editorial purposes without the
intention of improperly using them. They are the property of their respective owners.
This posting serves as notice under 35 U.S.C.§287(a) for Mindray patents: http://www.mindrayna.com/patents.
Revision History
This manual has a revision number. This revision number changes whenever the manual is updated due to software or
technical specification change. Contents of this manual are subject to change without prior notice.
Revision number: 6.0
Release time: January 2019
© 2015-2019 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.
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.Federal Law (USA) restricts this device to sale by or on
the order of a physician.
NOTE
This manual describes all features and options. The equipment may not have all of them. Contact Mindray
service department for any questions.

II
Manufacturer’s Responsibility
Contents of this manual are subject to changes without prior notice.
All information contained in this manual is believed to be correct. Mindray shall not be liable for errors contained herein
nor for incidental or consequential damages in connection with the furnishing, performance, or use of this manual.
Mindray is responsible for safety, reliability and performance of this product only in the condition that:
All installation operations, expansions, changes, modifications and repairs of this product are conducted by
Mindray authorized personnel; and
The electrical installation of the relevant room complies with the applicable national and local requirements; and
This product is operated under strict observance of this manual.

III
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.
Contact Information
Manufacturer:
Address:
Tel:
Fax:
Website:
Distributor:
Address:
Tel:
Website:
Shenzhen Mindray Bio-Medical Electronics Co., Ltd.
Mindray Building, Keji 12th Road South, High-tech Industrial Park, Nanshan, Shenzhen
518057 P.R. China
[phone]
[phone]
www.mindray.com
Mindray DS USA, Inc.
800 MacArthur Boulevard, Mahwah, New Jersey 07430, USA
1.800.288.2121, 1.201.995.8000
www.mindray.com

IV
Preface
Manual Purpose
This manual provides detailed information about the assembly, disassembly, and testing of the equipment to support
effective troubleshooting and repair. It is not intended to be a comprehensive, in-depth explanation of the product
architecture or technical implementation. Observance of the manual is a prerequisite for proper equipment
maintenance and prevents equipment damage and personnel injury.
This manual is based on the maximum configuration; Therefore, some contents may not apply to your monitor. If you
have any question, please contact our Technical Support Department.
Intended Audience
This manual is for biomedical engineers, authorized technicians or service representatives responsible for
troubleshooting, repairing and maintaining the patient monitors.
Passwords
A password may be required to access different modes within the monitor. The passwords are listed below:
User maintenance: 888888 (User adjustable)
Configuration mode: 315666 (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.

1
Contents
1 Safety ................................................................................................................................................................................. 1-1
1.1 Safety Information ................................................................................................................................................................................................1-1
1.1.1 Warnings ........................................................................................................................................................................................................1-1
1.1.2 Cautions.........................................................................................................................................................................................................1-2
1.1.3 Notes...............................................................................................................................................................................................................1-2
1.2 Equipment Symbols............................................................................................................................................................................................. 1-2
2 Theory of Operation.......................................................................................................................................................... 2-1
2.1 The Basics .................................................................................................................................................................................................................2-1
2.2 System Connections.............................................................................................................................................................................................2-2
2.2.1 Installation Support...................................................................................................................................................................................2-2
2.2.2 Connectors for Peripheral Devices.......................................................................................................................................................2-3
2.3 Main Unit.................................................................................................................................................................................................................. 2-5
2.4 Front Housing Assembly.....................................................................................................................................................................................2-6
2.4.1 Main Board....................................................................................................................................................................................................2-6
2.4.2 Keypad............................................................................................................................................................................................................2-6
2.4.3 Alarm Lamp Board .....................................................................................................................................................................................2-7
2.4.4 Touchscreen and Touchscreen Control Board..................................................................................................................................2-7
2.4.5 Wi-Fi Module (For Passport 12/Passport 8 Only).............................................................................................................................2-7
2.5 Rear Housing Assembly ......................................................................................................................................................................................2-7
2.5.1 AC/DC Power Board...................................................................................................................................................................................2-8
2.5.2 Power Management Board .....................................................................................................................................................................2-8
2.5.3 Interface Board............................................................................................................................................................................................2-8
2.5.4 Battery Interface Board ............................................................................................................................................................................2-8
2.5.5 Recorder.........................................................................................................................................................................................................2-8
2.5.6 Multi-parameter Board.............................................................................................................................................................................2-8
2.5.7 SpO2Board....................................................................................................................................................................................................2-9
2.5.8 Parameter Connector Board...................................................................................................................................................................2-9
2.6 Modules ....................................................................................................................................................................................................................2-9
2.6.1 Module Converter ......................................................................................................................................................................................2-9
2.6.2 Converter.....................................................................................................................................................................................................2-10
2.6.3 IBP + C.O. Module.....................................................................................................................................................................................2-10
2.6.4 CO2Module.................................................................................................................................................................................................2-10
2.6.5 AG Module ..................................................................................................................................................................................................2-10
3 Unpacking and Installation .............................................................................................................................................. 3-1
3.1 Unpacking the Equipment.................................................................................................................................................................................3-1
3.2 Preparation for Installation ................................................................................................................................................................................ 3-2
3.2.1 Preparation for Installation Site.............................................................................................................................................................3-2
3.2.2 Electrical Requirements ...........................................................................................................................................................................3-3
3.2.3 Monitor Installation ...................................................................................................................................................................................3-3
3.2.4 Preparation for Power on.........................................................................................................................................................................3-3

2
3.2.5 Wireless Network Specification............................................................................................................................................................. 3-3
3.2.6 Network Setup Overview........................................................................................................................................................................ 3-4
3.2.7 Setting the Network Type ....................................................................................................................................................................... 3-5
3.2.8 Setting the Wireless Network (For Passport 12/Passport 8 Only)............................................................................................. 3-5
3.2.9 Setting the WLAN Band and Channels (For Passport 12/Passport 8 Only) ........................................................................... 3-6
3.2.10 Certificates Maintenance ...................................................................................................................................................................... 3-6
3.2.11 Setting the Network Service Quality Level..................................................................................................................................... 3-7
3.2.12 Setting the Multicast Parameters....................................................................................................................................................... 3-7
4 Hardware and Software Upgrade .................................................................................................................................... 4-1
4.1 Hardware Upgrade............................................................................................................................................................................................... 4-1
4.1.1 Upgrade Package ....................................................................................................................................................................................... 4-1
4.1.2 Hardware Upgrade Method ................................................................................................................................................................... 4-2
4.2 Software Upgrade................................................................................................................................................................................................. 4-3
5 Testing and Maintenance.................................................................................................................................................. 5-1
5.1 Introduction............................................................................................................................................................................................................ 5-1
5.2 Preventative Maintenance................................................................................................................................................................................. 5-1
5.2.1 Preventative Maintenance Frequency................................................................................................................................................ 5-1
5.2.2 CO2Tests and Calibration ........................................................................................................................................................................ 5-2
5.2.3 AG Tests and Calibration.......................................................................................................................................................................... 5-4
5.3 Performance Tests................................................................................................................................................................................................. 5-6
5.3.1 Performance Test Frequencies .............................................................................................................................................................. 5-6
5.3.2 Visual Inspection ........................................................................................................................................................................................ 5-6
5.3.3 ECG Tests........................................................................................................................................................................................................ 5-7
5.3.4 Resp Performance Test ............................................................................................................................................................................. 5-7
5.3.5 SpO2Test........................................................................................................................................................................................................ 5-8
5.3.6 NIBP Tests ...................................................................................................................................................................................................... 5-8
5.3.7 Temp Test.....................................................................................................................................................................................................5-10
5.3.8 IBP Performance Test ..............................................................................................................................................................................5-10
5.3.9 C.O. Test........................................................................................................................................................................................................5-11
5.3.10 Nurse Call Reply Performance Test..................................................................................................................................................5-11
5.3.11 Analog Output Performance Test ....................................................................................................................................................5-12
5.4 Electrical Safety and Other Tests ...................................................................................................................................................................5-12
5.4.1 Electrical Safety and Other Test Frequencies .................................................................................................................................5-12
5.4.2 Electrical Safety Test................................................................................................................................................................................5-12
5.4.3 Power-on Test ............................................................................................................................................................................................5-12
5.4.4 Touchscreen Calibration ........................................................................................................................................................................5-13
5.4.5 Recorder Check.........................................................................................................................................................................................5-13
5.4.6 Battery Check.............................................................................................................................................................................................5-13
5.4.7 Network Print Test....................................................................................................................................................................................5-14
5.4.8 Print Function Test ...................................................................................................................................................................................5-15
5.5 Factory Maintenance.........................................................................................................................................................................................5-15
5.5.1 Accessing Factory Maintenance Menu.............................................................................................................................................5-15
5.5.2 Configuring the Central Station..........................................................................................................................................................5-15
5.5.3 Drawing Waves..........................................................................................................................................................................................5-15

3
5.5.4 Enabling/Disabling Recorder ...............................................................................................................................................................5-15
5.5.5 Checking Software version ...................................................................................................................................................................5-15
5.5.6 Checking Monitor information............................................................................................................................................................5-15
6 Troubleshooting................................................................................................................................................................ 6-1
6.1 Introduction ............................................................................................................................................................................................................6-1
6.2 Part Replacement.................................................................................................................................................................................................. 6-1
6.3 Checking Monitor Status.................................................................................................................................................................................... 6-1
6.4 Checking Software Version................................................................................................................................................................................6-1
6.5 Checking Technical Alarms................................................................................................................................................................................6-2
6.6 Troubleshooting Guide ....................................................................................................................................................................................... 6-2
6.6.1 Power On/Off Failure.................................................................................................................................................................................6-2
6.6.2 Display Failures............................................................................................................................................................................................6-2
6.6.3 Alarm Lamp Failures..................................................................................................................................................................................6-3
6.6.4 Button and Knob Failures ........................................................................................................................................................................6-3
6.6.5 Sound Failures .............................................................................................................................................................................................6-4
6.6.6 Battery Failures............................................................................................................................................................................................6-4
6.6.7 Recorder Failures ........................................................................................................................................................................................6-5
6.6.8 Output Interface Failure...........................................................................................................................................................................6-5
6.6.9 Data Storage Failure ..................................................................................................................................................................................6-6
6.6.10 Wired Network Related Problems......................................................................................................................................................6-6
6.6.11 Wi-Fi Related Problems (For Passport 12/Passport 8 Only).......................................................................................................6-7
6.6.12 Module Failures ........................................................................................................................................................................................6-9
6.6.13 Technical Alarm Messages ....................................................................................................................................................................6-9
7 Disassembly and Repair.................................................................................................................................................... 7-1
7.1 Tools Required........................................................................................................................................................................................................7-1
7.2 Preparations for Disassembly ...........................................................................................................................................................................7-1
7.3 Disassembling the Main Unit............................................................................................................................................................................ 7-2
7.3.1 Separating the Front and Rear Half of the Monitor........................................................................................................................7-2
7.3.2 Disassembling Parameter Modules ..................................................................................................................................................... 7-3
7.3.3 Removing the Parameter Connector Panel Assembly..................................................................................................................7-3
7.3.4 Removing the SpO2Board and Parameter Board........................................................................................................................... 7-3
7.3.5 Removing Pump and Valve.....................................................................................................................................................................7-4
7.3.6 Removing the Recorder (Optional)......................................................................................................................................................7-4
7.3.7 Removing Battery Interface Board and Power Board (Passport 8/cPM 8) .............................................................................7-5
7.3.8 Removing the Battery Interface Board and Power Board (Passport 12/cPM 12).................................................................7-6
7.3.9 Removing the Power Management Board........................................................................................................................................7-7
7.3.10 Removing the Interface Board (Passport 8/cPM 8)......................................................................................................................7-8
7.3.11 Removing the Interface Board (Passport 12/cPM 12).................................................................................................................7-8
7.4 Disassembling the Front Housing Assembly ..............................................................................................................................................7-8
7.4.1 Removing Touchscreen Control Board ...............................................................................................................................................7-9
7.4.2 Removing the Wi-Fi Module (For Passport 12/Passport 8 Only)................................................................................................7-9
7.4.3 Removing SD Card ...................................................................................................................................................................................7-10
7.4.4 Removing the Main Control Board ....................................................................................................................................................7-10
7.4.5 Removing the Touchscreen ..................................................................................................................................................................7-11

4
7.4.6 Disassembling the Screen.....................................................................................................................................................................7-11
7.4.7 Removing the Keypad............................................................................................................................................................................7-11
7.4.8 Removing the Encoder...........................................................................................................................................................................7-12
7.4.9 Removing the Alarm Lamp Board......................................................................................................................................................7-12
7.5 Disassembling Modules ...................................................................................................................................................................................7-12
7.5.1 Removing the External Converter Board.........................................................................................................................................7-12
7.5.2 Separating the Front and Rear Housing of Modules...................................................................................................................7-12
7.5.3 Removing the External Module Interface Board ..........................................................................................................................7-13
7.5.4 Removing M03B Module.......................................................................................................................................................................7-13
7.5.5 Removing Sidestream CO2Module ...................................................................................................................................................7-14
7.5.6 Removing Microstream CO2Module ................................................................................................................................................7-14
7.5.7 Removing AG Module ............................................................................................................................................................................7-15
8 Parts.................................................................................................................................................................................... 8-1
8.1 Introduction............................................................................................................................................................................................................ 8-1
8.2 Passport 8 ................................................................................................................................................................................................................ 8-2
8.2.1 Main Unit....................................................................................................................................................................................................... 8-2
8.2.2 Front Housing Subassembly .................................................................................................................................................................. 8-3
8.2.3 Rear Housing Assembly ........................................................................................................................................................................... 8-5
8.2.4 Multi-parameter Assembly ..................................................................................................................................................................... 8-6
8.2.5 Battery Compartment Assembly.......................................................................................................................................................... 8-7
8.2.6 NIBP Pump and Valve Kit ......................................................................................................................................................................... 8-8
8.2.7 IBP_C.O. Module Assembly..................................................................................................................................................................... 8-9
8.2.8 IBP_C.O._Sidestream CO2Module Assembly .................................................................................................................................8-10
8.2.9 IBP_C.O._Microstream CO2Module Assembly ..............................................................................................................................8-11
8.3 Passport 12............................................................................................................................................................................................................8-13
8.3.1 Main Unit.....................................................................................................................................................................................................8-13
8.3.2 Front Housing Subassembly ................................................................................................................................................................8-14
8.3.3 Rear Housing Assembly .........................................................................................................................................................................8-16
8.3.4 Battery Compartment Assembly........................................................................................................................................................8-17
8.3.5 Multi-parameter Assembly ...................................................................................................................................................................8-17
8.3.6 NIBP Pump and Valve Kit .......................................................................................................................................................................8-17
8.3.7 IBP_C.O. Module Assembly...................................................................................................................................................................8-18
8.3.8 IBP_C.O._Sidestream CO2Module Assembly .................................................................................................................................8-18
8.3.9 IBP_C.O._Microstream CO2Module Assembly ..............................................................................................................................8-18
8.3.10 IBP_C.O._AG Module Assembly........................................................................................................................................................8-18
8.4 cPM 8.......................................................................................................................................................................................................................8-20
8.4.1 Main Unit.....................................................................................................................................................................................................8-20
8.4.2 Front Housing Subassembly ................................................................................................................................................................8-21
8.4.3 Rear Housing Assembly .........................................................................................................................................................................8-22
8.4.4 Multi-parameter Assembly ...................................................................................................................................................................8-22
8.4.5 Battery Compartment Assembly........................................................................................................................................................8-22
8.4.6 NIBP Pump and Valve Kit .......................................................................................................................................................................8-22
8.4.7 IBP_C.O. Module Assembly...................................................................................................................................................................8-22
8.4.8 IBP_C.O._Sidestream CO2Module Assembly .................................................................................................................................8-23
8.4.9 IBP_C.O._Microstream CO2Module Assembly ..............................................................................................................................8-23

5
8.5 cPM 12.....................................................................................................................................................................................................................8-23
8.5.1 Main Unit .....................................................................................................................................................................................................8-23
8.5.2 Front Housing Subassembly.................................................................................................................................................................8-24
8.5.3 Rear Housing Assembly .........................................................................................................................................................................8-25
8.5.4 Battery Compartment Assembly ........................................................................................................................................................8-25
8.5.5 Multi-parameter Assembly ...................................................................................................................................................................8-25
8.5.6 NIBP Pump and Valve Kit........................................................................................................................................................................8-25
8.5.7 IBP_C.O. Module Assembly ...................................................................................................................................................................8-25
8.5.8 IBP_C.O._Sidestream CO2Module Assembly..................................................................................................................................8-26
8.5.9 IBP_C.O._Microstream CO2Module Assembly...............................................................................................................................8-26
8.5.10 IBP_C.O._AG Module Assembly ........................................................................................................................................................8-26
A Electrical Safety Inspection..............................................................................................................................................A-1
A.1 Power Cord Plug....................................................................................................................................................................................................A-1
A.2 Device Enclosure and Accessories..................................................................................................................................................................A-1
A.2.1 Visual Inspection................................................................................................................................................................................................A-1
A.2.2 Contextual Inspection .....................................................................................................................................................................................A-2
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 FORM......................................................................................................................................................A-3

6
FOR YOUR NOTES

1-1
1Safety
1.1 Safety Information
WARNING
Indicates a potential hazard or unsafe practice that, if not avoided, will 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 Warnings
WARNING
All installation operations, expansions, changes, modifications and repairs of this product are 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 or the battery.
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.
Disposal of the packaging material should observe the applicable waste control regulations. and keeping it
out of children’s reach.

1-2
1.1.2 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 receiver to the power line, check that the voltage and frequency ratings of the power
line are the same as those indicated on the unit’s label or in this manual.
Protect the equipment from damage caused by drop, impact, strong vibration or other mechanical force
during servicing.
1.1.3 Notes
NOTE
Refer to Operator’s Manual for detailed operation and other information.
1.2 Equipment Symbols
See the Passport 12/Passport 8 Operator’s Manual and cPM 12/cPM 8 Operator’s Manual for information about the
symbols used on this product and its packaging.

2-1
2Theory of Operation
2.1 The Basics
This monitor is designed to monitor a fixed set of physiological parameters including ECG, respiration (Resp),
temperature (Temp), SpO2, pulse rate (PR), non-invasive blood pressure (NIBP), invasive blood pressure (IBP), cardiac
output (C.O.), carbon dioxide (CO2), and anesthetic gas (AG).
The monitor also:
Provides audible and visual alarm indications in case of patient or equipment problems.
Enables displaying, reviewing, storing and transferring of real-time data and wave.
Incorporates multiple input devices such as buttons, knob, and touchscreen.
Enables software upgrade over the network.
Integrates the information of other devices, which include but are not restricted to defibrillator.
AnalogSignal
Output
Synchronized
SignalOutput

2-2
The above figure shows a system consists of the patient monitor and its peripheral devices. The patient monitor:
Can be used for monitoring the physiological parameters, giving alarms and reviewing patient data, etc.
Supports recorder.
Supports nurse call signal, synchronization defibrillation signal, and analog output signal.
Supports Wi-Fi module, wired network, remote view, and communication with the Hypervisor Central Station
(CMS).
Supports a secondary display.
Supports AC power source and battery power source (Passport 8/cPM 8 patient monitors additionally supports
DC power source).
Supports clinical data acquisition in two formats: SD card (integral to unit) and USB drive.
The system software should support data output function, for SD card is a built-in device.
2.2 System Connections
2.2.1 Installation Support
The monitor can be mounted on a wall bracket or on a trolley support. The wall bracket or trolley support can be
ordered optionally. Each type of mounting bracket is delivered with a complete set of mounting hardware and
instructions. Refer to the documentation delivered with the mounting hardware for instructions on assembling
mounts.
CAUTION
Use mounting brackets we supply or approve. If other compatible mounting bracket is used, be sure it can
be safely used on the monitor.
The mounting bracket should be installed by our qualified service personnel, or engineers who have
adequate knowledge on it.
If other mounting solution is used, the installation personnel and the customer should verify if it can be
safely used on the monitor, and the customer will assume the responsibility for any resultant risk. This
indicates a potential hazard or unsafe practice that, if not avoided, could result in minor personal injury or
product/property damage.

2-3
2.2.2 Connectors for Peripheral Devices
On the back of the monitor you can find all connectors for peripheral devices.
Passport 12/cPM 12 Rear View
1. AC power input: used to connect an AC power source (100 to 240 VAC, 50/60 Hz).
2. Equipotential terminal: used to connect the equipotential terminal of other equipment.
3. Parameter Module slot: used to connect the parameter module.
4. General USB Connector: used to connect any USB-compatible peripheral device.
5. Multifunctional connector:
Used to connect external devices and output defibrillator synchronization signals, nurse call signals, analog
output signals, measurement numerics, and alarm limits of parameter modules.
Communicates with external devices via Datascope Improved ASCII Protocol (DIAP) protocol.
6. Network Connector: an RJ45 connector, used to connect an Ethernet network or a PC.
7. VGA Connector: used to connect a secondary display.
12
4 6
5 7
3

2-4
Passport 8/cPM 8 Rear View
1. Equipotential terminal: used to connect the equipotential terminal of other equipment.
2. AC power input: used to connect an AC power source (100 to 240 VAC, 50/60 Hz).
3. Parameter Module slot: used to connect the parameter module.
4. Multifunctional connector:
Used to connect external devices and output defibrillator synchronization signals, nurse call signals, analog
output signals, measurement numerics, and alarm limits of parameter modules.
Communicates with external devices via Datascope Improved ASCII Protocol (DIAP) protocol.
5. DC power input
6. General USB Connector: used to connect any USB-compatible peripheral device.
7. Network Connector: an RJ45 connector, used to connect an Ethernet network or a PC.
8. VGA Connector: used to connect a secondary display.
2
1
4
5
6
7
3

2-5
2.3 Main Unit
The main unit of the monitor consists of two parts:
Front housing assembly: main board, keypad board assembly (knob), display, touchscreen, alarm lamp board,
power switch, and indicator board.
Rear housing assembly: power board (AC/DC), power management board, battery pad, interface board, recorder,
speaker, and multi-parameter module which includes two types of SpO2stacking board.
The following figure shows the main unit architecture of the monitor.
Wi-Fi
Antenna
MainBoard
PowerBoard
Battery
InterfaceBoard
Keypad
Board
Touchscreen
Control
Board
Touchscre
en
Display
Multi-parameterBoard
PowerManagementBoard
Recorder
SpO2Board
Speaker
AlarmLamp
Board
Parameter
Connector
Panel
InterfaceBoard

2-6
2.4 Front Housing Assembly
2.4.1 Main Board
The main board is the control center of the system. It provides communication, display, and data storage functions,
including:
Display drive and backlight control
Wired and wireless network
Data Storage
Printing
Serial port communication
Connection with touchscreen control board
Audio drive
EEPROM drive
USB drive
2.4.2 Keypad
The keypad scans and detects the input of keys and knobs, integrates the power on/off key, and connects AC and
battery indicators.
Touchscreen
control board
Main board
Alarm lamp board
Keypad
Lock hatch
Wi-Fi module
Screws fastening the front and rear housing