Mindray BeneView T5 Service Manual
BeneView T5
Patient Monitor
Service Manual
Intellectual Property Statement
SHENZHEN MINDRAY BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called
Mindray) owns the intellectual property rights to this product and this manual. This manual
may refer to information protected by copyrights or patents and does not convey any license
under the patent rights of Mindray, nor the rights of others. Mindray does not assume any
liability arising out of any infringements of patents or other rights of third parties.
Mindray intends to maintain the contents of this manual as confidential information.
Disclosure of the information in this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden. Release, amendment, reproduction, distribution,
rent, adaption and translation of this manual in any manner whatsoever without the written
permission of Mindray is strictly forbidden.
, and are the registered trademarks or trademarks owned
by Mindray in China and other countries. All other trademarks that appear in this manual are
used only for editorial purposes without the intention of improperly using them. They are the
property of their respective owners.
Contents of this manual are subject to changes without prior notice.
I
FOR YOUR NOTES
II
Preface
Manual Purpose
This manual provides detailed information about the assembling, dissembling, testing and
troubleshooting of the equipment to support effective troubleshooting and repair. It is not
intended to be a comprehensive, in-depth explanation of the product architecture or technical
implementation. Observance of the manual is a prerequisite for proper equipment
maintenance and prevents equipment damage and personnel injury.
This manual is based on the maximum configuration; Therefore, some contents may not
apply to your monitor. If you have any question, please contact our Customer Service
Department.
Intended Audience
This manual is for biomedical engineers, authorized technicians or service representatives
responsible for troubleshooting, repairing and maintaining the patient monitors.
Revision History
This manual has a revision number. This revision number changes whenever the manual is
updated due to software or technical specification change. Contents of this manual are subject
to change without prior notice.
Revision number: 1.0
Release time: January 2007
© 2007 Shenzhen Mindray Bio-Medical Electronics Co., Ltd. All rights reserved.
III
Abbreviations
Abbreviations used in this manual are:
MPM multi-parameter module
SMR satellite module rack
CMS central monitoring system
Passwords
A password may be required to access different modes within the monitor. The passwords are
listed below:
User maintenance: 888888
Factory maintenance: 332888
Demo mode: 2088
IV
Contents
Contents
1 Safety................................................................................................................................. 1-1
1.1 Safety Information ..........................................................................................................1-1
1.1.1 DANGER ........................................................................................................... 1-2
1.1.2 Warnings............................................................................................................. 1-2
1.1.3 Cautions ............................................................................................................. 1-2
1.1.4 Notes .................................................................................................................. 1-3
1.2 Equipment Symbols ........................................................................................................ 1-3
2 Theory of Operation ........................................................................................................ 2-1
2.1 Introduction..................................................................................................................... 2-1
2.2 System Connections........................................................................................................ 2-2
2.2.1 Mounting the Patient Monitor............................................................................ 2-2
2.2.2 Connectors for Peripheral Devices..................................................................... 2-3
2.3 Main Unit ........................................................................................................................ 2-4
2.3.1 Input System ...................................................................................................... 2-5
2.3.2 Output System.................................................................................................... 2-6
2.3.3 Processing and Communications System........................................................... 2-8
2.3.4 Power Management System............................................................................. 2-10
2.3.5 Equipment Interface System ............................................................................ 2-13
2.4 Parameter Module ......................................................................................................... 2-15
2.4.1 Module Communication Board........................................................................ 2-15
2.4.2 Module Power Board ....................................................................................... 2-15
2.4.3 Module Button Board....................................................................................... 2-15
2.4.4 Parameter Board............................................................................................... 2-15
2.5 SMR .............................................................................................................................. 2-16
3 Testing and Maintenance................................................................................................. 3-1
3.1 Introduction..................................................................................................................... 3-1
3.1.1 Test Report ......................................................................................................... 3-2
3.1.2 Recommended Frequency.................................................................................. 3-2
3.2 Visual Test....................................................................................................................... 3-3
3.3 Power On Test ................................................................................................................. 3-4
3.4 Module Performance Tests .............................................................................................. 3-4
3.4.1 Mainstream CO
3.4.2 Sidestream and Microstream CO
3.4.3 ECG Tests........................................................................................................... 3-6
3.4.4 Resp Performance Test....................................................................................... 3-7
3.4.5 NIBP Tests.......................................................................................................... 3-8
Tests........................................................................................ 3-4
2
Module Test ................................................. 3-5
2
1
Contents
3.4.6 IBP Tests............................................................................................................3-11
3.4.7 SpO
Test.......................................................................................................... 3-13
2
3.4.8 C.O. Test........................................................................................................... 3-13
3.4.9 Temp Test......................................................................................................... 3-13
3.4.10 BIS Test.......................................................................................................... 3-14
3.4.11 RM Test .......................................................................................................... 3-14
3.4.12 ICG Test ......................................................................................................... 3-15
3.4.13 AG Tests......................................................................................................... 3-15
3.5 Nurse Call Relay Performance Test .............................................................................. 3-18
3.6 Analog Output Performance Test .................................................................................. 3-18
3.7 Electrical Safety Tests ................................................................................................... 3-19
3.7.1 Enclosure Leakage Current Test....................................................................... 3-20
3.7.2 Earth Leakage Current Test.............................................................................. 3-20
3.7.3 Patient Leakage Current Test ........................................................................... 3-21
3.7.4 Patient Auxiliary Leakage Current Test ........................................................... 3-21
3.8 Touchscreen Calibration................................................................................................ 3-22
3.9 Recorder Check............................................................................................................. 3-22
3.10 Factory Maintenance................................................................................................... 3-23
3.10.1 Accessing Factory Maintenance Menu........................................................... 3-23
3.10.2 Drawing Waves .............................................................................................. 3-23
3.10.3 Recorder ......................................................................................................... 3-23
3.10.4 Software Version ............................................................................................ 3-24
3.10.5 Monitor Information....................................................................................... 3-24
3.10.6 Calibrate NIBP............................................................................................... 3-24
3.11 Program Upgrade ........................................................................................................ 3-25
4 Troubleshooting................................................................................................................ 4-1
4.1 Introduction..................................................................................................................... 4-1
4.2 Part Replacement ............................................................................................................4-1
4.3 Patient Monitor Status Check.......................................................................................... 4-1
4.4 Software Version Check .................................................................................................. 4-2
4.5 Technical Alarm Check ................................................................................................... 4-2
4.6 Troubleshooting Guide.................................................................................................... 4-2
4.6.1 Power On/Off Failures ....................................................................................... 4-2
4.6.2 Display Failures ................................................................................................. 4-3
4.6.3 Module Rack Failures ........................................................................................ 4-5
4.6.4 Alarm Problems.................................................................................................. 4-7
4.6.5 Button and Knob Failures .................................................................................. 4-8
4.6.6 Recorder Failures ............................................................................................... 4-8
4.6.7 Output Interface Failures.................................................................................... 4-9
4.6.8 CF Card Problems............................................................................................ 4-10
4.6.9 Power Supply Failures ..................................................................................... 4-10
4.6.10 Network Related Problems............................................................................. 4-12
4.6.11 Software Upgrade Problems........................................................................... 4-13
2
Contents
5 Repair and Disassembly ..................................................................................................5-1
5.1 Tools................................................................................................................................ 5-1
5.2 Preparations for Disassembly.......................................................................................... 5-1
5.3 Disassembling Procedure................................................................................................ 5-2
5.3.1 Separating the Front and Rear Housing ............................................................. 5-2
5.3.2 Removing the Power Switch & LED Board ...................................................... 5-4
5.3.3 Removing the Knob Encoder ............................................................................. 5-4
5.3.4 Removing the Button Board............................................................................... 5-5
5.3.5 Removing the LCD Assembly............................................................................ 5-6
5.3.6 Removing the Alarm LED Board....................................................................... 5-8
5.3.7 Removing the Fan Assembly.............................................................................. 5-9
5.3.8 Removing Battery Compartment Assembly....................................................... 5-9
5.3.9 Removing the Integral Module Rack ............................................................... 5-10
5.3.10 Removing the CF Card Assembly...................................................................5-11
5.3.11 Removing the Main Board ............................................................................. 5-13
5.3.12 Removing the Speaker ................................................................................... 5-15
5.3.13 Removing the Power Module Assembly ........................................................ 5-16
5.3.14 Removing the Main Support .......................................................................... 5-18
5.3.15 Removing the Interface Board Assembly....................................................... 5-18
5.3.16 Removing the Recorder.................................................................................. 5-21
5.4 Removing the SMR Assembly ...................................................................................... 5-25
5.5 Disassembling Modules ................................................................................................ 5-29
5.5.1 Disassembling the ICG Module ....................................................................... 5-29
5.5.2 Disassembling CO
Module ............................................................................. 5-33
2
6 Parts .................................................................................................................................. 6-1
6.1 Introduction..................................................................................................................... 6-1
6.2 Main Unit ........................................................................................................................ 6-2
6.2.1 Exploded View ................................................................................................... 6-2
6.2.2 Parts List ............................................................................................................ 6-2
6.3 Front housing Assembly.................................................................................................. 6-3
6.3.1 12” LCD with Anti-glare Screen ........................................................................ 6-3
6.3.2 12” LCD with Touchscreen................................................................................ 6-5
6.4 Main Unit ........................................................................................................................ 6-7
6.4.1 Main Unit Assembly .......................................................................................... 6-7
6.4.2 Battery Compartment Assembly ........................................................................ 6-9
6.4.3 Power Module assembly .................................................................................. 6-10
6.4.4 Interface Board Assembly .................................................................................6-11
6.4.5 Main Board Assembly...................................................................................... 6-12
6.4.6 Integral module rack ........................................................................................ 6-13
6.4.7 Main Support Assembly................................................................................... 6-14
6.4.8 Rear Housing Assembly................................................................................... 6-15
6.4.9 CF Card Assembly ........................................................................................... 6-16
6.4.10 Recorder Assembly ........................................................................................ 6-17
3
Contents
6.5 SMR .............................................................................................................................. 6-18
6.5.1 SMR Assembly................................................................................................. 6-18
6.5.2 SMR Inside Assembly...................................................................................... 6-19
6.6 Parameter Modules........................................................................................................ 6-20
6.6.1 MPM Module................................................................................................... 6-20
6.6.2 C.O. Module..................................................................................................... 6-21
6.6.3 RM Module ...................................................................................................... 6-23
6.6.4 ICG Module ..................................................................................................... 6-24
6.6.5 AG Module....................................................................................................... 6-26
6.6.6 BIS Module ...................................................................................................... 6-27
6.6.7 IBP Module ...................................................................................................... 6-29
6.6.8 Mindray CO
Module....................................................................................... 6-30
2
6.6.9 Oridion CO2 Module ....................................................................................... 6-31
6.7 Replaceable Parts .......................................................................................................... 6-33
6.7.1 Main Unit ......................................................................................................... 6-33
6.7.2 SMR ................................................................................................................. 6-35
6.7.3 Parameter Modules........................................................................................... 6-35
4
1 Safety
1.1 Safety Information
DANGER
z Indicates an imminent hazard that, if not avoided, will result in death or serious
injury.
WARNING
z Indicates a potential hazard or unsafe practice that, if not avoided, could result in
death or serious injury.
CAUTION
z Indicates a potential hazard or unsafe practice that, if not avoided, could result in
minor personal injury or product/property damage.
NOTE
z Provides application tips or other useful information to ensure that you get the
most from your product.
1-1
Safety
1.1.1 DANGER
There are no dangers that refer to the product in general. Specific “Danger” statements may
be given in the respective sections of this manual.
1.1.2 Warnings
WARNING
z All installation operations, expansions, changes, modifications and repairs of this
product are conducted by authorized personnel.
z There is high voltage inside the equipment. Never disassemble the equipment
before it is disconnected from the AC power source.
z When you disassemble/reassemble a parameter module, a patient leakage current
test must be performed before it is used again for monitoring.
z The equipment must be connected to a properly installed power outlet with
protective earth contacts only. If the installation does not provide for a protective
earth conductor, disconnect it from the power line and operate it on battery power,
if possible.
z Dispose of the package material, observing the applicable waste control regulations
and keeping it out of children’s reach.
1.1.3 Cautions
CAUTION
z Make sure that no electromagnetic radiation interferes with the performance of the
equipment when preparing to carry out performance tests. Mobile phone, X-ray
equipment or MRI devices are a possible source of interference as they may emit
higher levels of electromagnetic radiation.
z Before connecting the equipment to the power line, check that the voltage and
frequency ratings of the power line are the same as those indicated on the
equipment’s label or in this manual.
z Protect the equipment from damage caused by drop, impact, strong vibration or
other mechanical force during servicing.
1-2
Safety
1.1.4 Notes
NOTE
z Refer to Operation Manual for detailed operation and other information.
1.2 Equipment Symbols
Attention: Consult
accompanying documents
(this manual).
CIS connector
Danger: High-voltage
Alternating current(AC)
Power ON/OFF
Battery indication
Zero key
Calibrate key
Measure/Standby
Check sensor
Type CF applied part. Defibrillator-proof protection against electric shock.
Network connector
Defibrillator connector
Connector for satellite
module rack
Video output
Auxiliary output connector
USB connector
Equipotential terminal
ESD warning symbol for
Electrostatic sensitive
devices.
Type BF applied part. Defibrillator-proof protection against electric shock.
1-3
FOR YOUR NOTES
Safety
1-4
2 Theory of Operation
2.1 Introduction
This patient monitor is designed to monitor a fixed set of physiological parameters including
ECG, heart rate (HR), respiration (Resp), temperature (Temp), SpO
non-invasive blood pressure (NIBP), invasive blood pressure (IBP), cardiac output (C.O.),
carbon dioxide (CO
bispectral index (BIS) and respiration mechanics (RM) of single adult, pediatric and neonatal
patients
The patient monitor also:
), oxygen (O2), anesthetic gas (AG), impedance cardiograph (ICG),
2
, pulse rate (PR),
2
Provides audible and visual alarm indications in case of patient or equipment problems.
Enables displaying, reviewing, storing and transferring of real-time data.
Incorporates multiple input devices such as buttons, knob, touchscreen, keyboard and
mouse.
Interfaces a clinical information system or central monitoring system.
Enables program upgrade over the network.
2-1
Theory of Operation
2.2 System Connections
2.2.1 Mounting the Patient Monitor
The patient monitor can be mounted on a wall bracket or on a trolley support. The wall
bracket or trolley support can be ordered optionally. Each type of mounting bracket is
delivered with a complete set of mounting hardware and instructions. Refer to the
documentation delivered with the mounting hardware for instructions on assembling mounts.
CAUTION
z Use mounting brackets we supply or approve. If other compatible mounting
bracket is used, be sure it can be safely used on the patient monitor.
z The mounting bracket should be installed by our qualified service personnel, or
engineers who have adequate knowledge on it.
z If other mounting solution is used, the installation personnel and the customer
should verify if it can be safely used on the patient monitor, and the customer
assume the responsibility for any risk resulting from that.
2-2
Theory of Operation
2.2.2 Connectors for Peripheral Devices
On the back of the patient monitor you will find all connectors for peripheral devices.
1
3
6
1. AC Power Connector: used to connect an AC power source (100 to 240 VAC, 50/60Hz).
2. Equipotential Terminal: used to connect the equipotential terminal of other equipment,
eliminating potential difference between different pieces of equipment.
3. Defibrillator Connector: It is a RJ11 connector used to connect a defibrillator.
7
8
2
4
5
9
4. CIS Connector: It is a RJ45 connector used to connect a CIS and output 12V DC power
supply.
5. Video Output: It is a DVI-D connector used to connect a secondary display.
6. Auxi Output Connector: It is a BNC connector used to output analog signals and nurse
call signals.
7. Network Connector: It is a RJ45 connector used to connect an ethernet network or a PC.
8. USB Connector: used to connect any USB-compatible peripheral device.
9. SMR Connector: It is used to connect the SMR and outputs a 12V DC.
2-3
Theory of Operation
2.3 Main Unit
The patient monitor consists of:
Input system: button board, knob, touchscreen, power switch and LED board
Output system: LCD panel, alarm LED board, recorder and speaker
Processing and communications system: main board and integral module rack assembly.
Power management system: battery, battery interface board and power module
Equipment interface system: USB_Hub interface board, DVI interface board and CF
card assembly
Additionally, the patient monitor can also connect a satellite module rack (SMR), parameter
modules, mouse, keyboard, etc.
The following diagram illustrates the structure of the patient monitor
2-4
Theory of Operation
2.3.1 Input System
Button board
The button board, located at the lower part of the monitor’s front panel, contains 6 keys and
provides connections for the following components to the main board:
Knob
Power switch & LED board
Touchscreen control board
Alarm LED board
Inverter
The following diagram shows the button board connections.
Knob
The knob can be pressed, or rotated both clockwise and counter-clockwise. It is connected
with the button board.
Touchscreen
The touchscreen enables touch operations and can be calibrated. It is connected with the
touchscreen control board and main board.
Power switch & LED Board
The power switch & LED board controls the power supply for the main unit. It has three
LEDs, which respectively indicate the AC power status, battery status and monitor power
on/off status. It is connected with the button board.
2-5
Theory of Operation
2.3.2 Output System
LCD panel
The patient monitor adopts a high-resolution LCD panel. The LCD panel is connected with
the backlight board and the main board. It runs on power from a DC source, which originally
comes from the main board, and then goes to the backlight board through the button board,
and finally is delivered to the LCD panel by the backlight board.
Alarm Lamp
The patient monitor has two alarm lamps: physiological alarm lamp and technical alarm lamp.
The alarm LED board converts electric signals into visual signals and then sends the visual
signals to the front panel through the light guiding post. Physiological alarm lamp lights
either red or yellow whereas technical alarm lamp lights blue only.
Recorder
The recorder receives data form the main board and then sends them to the thermal printhead
for printing. The recorder has a hardkey (starting/stopping recordings) and a green LED on its
front panel. It is connected with the mother board.
The following diagram shows its operating principle.
Module Description
Power interface Introduces a DC from the main board.
Recorder power
module
Converts the input power into voltages that fit each module and then
forwards them to each module.
2-6
Theory of Operation
Recorder CPU Controls the communications between modules.
Signal interface
Motor drive circuit
Button board &
indicator interface
FPC interface
Controls the communications between the main board and the recorder
CPU.
Receives the control signals from the CPU and then forwards them to the
step motors
Sends key commands to the CPU and receive commands controlling the
indicators from the CPU.
Sends the thermal printhead information to the CPU and receives the
commands controlling the thermal printhead from the CPU.
Speaker
The speaker provides sound for alarms, key strokes, heart beats and pulse, and allows PITCH
TONE and multi-level tone modulation. It is connected with the main board which provides
sound signals.
2-7
Theory of Operation
2.3.3 Processing and Communications System
Main Board
The main board is the heart of the patient monitor. It implements a series of tasks including
input & output control, data storage and processing, display processing, system control,
communication management, printing management and alarming, etc.
The main board comprises the CPU board and mother board. The following diagram shows
interfaces to other components.
The CPU board is an essential CPU system containing the CPU, FLASH, memory, realtime
clock, EEPROM, etc. It interfaces to the mother board only, which then provides interfaces to
all other external devices.
2-8
Theory of Operation
The mother board is in charge of connections and communications with other components
and provides the following interfaces:
Name Description
LCD connector Connects the built-in display.
Video output +CIS+GPIO
port
USB×2+network+RS422
port
Button board connector Connects the button board.
Recorder connector Connects the recorder.
CF card connector Connects the CF card assembly.
Speaker connector Connects the speaker.
Power module connector Connects the power module.
Integral module rack
connector
Fan connector Connects the fan.
CPU board It is connected with the mother board through a butt socket.
WLAN assembly It is welded on the mother board.
Connects the digital video interface board.
Connects the USB_Hub board.
Connects the 3-slot rack communication board in the integral module
rack.
Integral Module Rack
The patient monitor has two kinds of integral module rack: 2-slot and 5-slot. The integral
module rack consists of control board and communication board.
The control board is a NIOS II module located on the communication board. It implements
protocol conversion and infrared communication between the main unit and the parameter
modules
The communication board can be a MPM type (2-slot type) or a 3-slot type. It consists of
infrared circuit, RS422 communication circuit and power circuit. The communication board
is connected with the mother board.
The infrared circuit transmits and receives infrared signals, and controls signal intensity;
RS422 communication circuit implements signal conversion between serial signals and
RS422 signals;
Power circuit transforms 12VDC power supply from the mother board into 3.3VDC
power supply to run the module rack and provides 12VDC power supply to run the
parameter modules.
2-9
Theory of Operation
2.3.4 Power Management System
Battery
The patient monitor uses two chargeable lithium-ion batteries (11.1 V, 4500 mAh). The
battery compartment is located at the bottom of the patient monitor. The battery power is
supplied to the mother board via the battery interface board, and then to the power module.
NOTE
z AC mains must be used when the CIS is connected with the patient monitor.
Battery Interface Board
The Battery interface board connects the batteries to the DC input terminal of the power
module via the mother board, implementing charging and discharging of the batteries and the
power board.
Power Module
The power module is located at the back of the patient monitor. The main part of the power
module is the power board, which contains charging & power management board, voltage
drop DC transforming board and voltage rise and drop DC transforming board.
The power module converts the input power into DC power supplies and then distributes
them to each component of the patient monitor. The input power comes from either the
batteries or an AC source. The patient monitor will run power from the AC source whenever
an AC source is available. If the AC source becomes unavailable, the patient monitor will
automatically switch to the battery power. This does not affect the monitor’s operating status.
The power module protects itself and the patient monitor by switching off AC input or DC
output in case of overcurrent, short circuit and overvoltage. The power module provides 3
DC outputs:
Outputs Description
＋3.3 V
＋5.0 V
Power supply of the mother board, CPU board, DVI interface board
and integral module rack.
Power supply of the DVI interface board, recorder, CF storage card
board and USB_Hub board.
＋12 V
Power supply of the recorder, LCD, integral module rack, parameter
modules, USB_Hub board and the CIS
2-10
Theory of Operation
The following diagram shows the pins of the power socket connecting the power module and
the mother board:
Pin ID Marking Description
1/3/5 12V The positive output of the 12 VDC power
2/4/6/8/10/
27/28/29/30
7/9 3V3 The positive output of the 3.3 VDC power
11 5V The positive output of the 5 VDC power
12 BC1 Signal indicating whether battery 1 is available.
13/15 BAT+1 Input of battery 1, connecting to the positive pole
14 NTC1 Thermistor signal of battery 1.
16 BC2 Signal indicating whether battery 2 is available.
18 NTC2 Thermistor signal of battery 2.
17/19 BAT+2 Input of battery 2, connecting to the positive pole
20 PCON Power on/off control signal. It is a TTL pulse
GND The output grounding terminal of the power
board.
Low level indicates that battery 1 is available and
high level indicates that battery 1 is not available.
of the battery.
Low level indicates that battery 2 is available and
high level indicates that battery 2 is not available.
of the battery.
signal inputted from the back board. Every time
when the power on/off switch is pressed (pulse of
falling edge), a switch between power “on” and
“off” happens. The pulse duration is no less than
0.1 s for power on, 2s for power off and 4s for
illegal power off.
21 BCON Backlight on/off signal and switch output signal.
The main board sends the LCD backlight on/off
signals to the power board via a serial port, the
power board processes the signals and output
2-11
Theory of Operation
them. Low level is output when the backlight is
off and high level is output when the backlight is
on.
22 LED-BAT Battery status indication driving output
23 LED-AC AC power status indication signal
24 LCD-BR Backlight brightness control voltage.
2-12
Theory of Operation
2.3.5 Equipment Interface System
USB_Hub board
The USB_Hub board is connected with the mother board. It is compatible with USB1.1
connectors and supports equipment hot plug. Moreover, the USB_Hub board provides RS232
and RS422 interfaces for the communication between main board and SMR. It receives 5
VDC and 12 VDC inputs from the power module, of which the 5 VDC is supplied the USB
interface board and the 12 VDC is outputted to the SMR connector through a fuse.
BNC Connects analogue output and nurse call.
RJ 45 connector
USB connector Connects devices with USB connector.
USB&POWER
connector
It is a standard RJ45 connector, providing 10/100 BASE-TX Ethernet
communications channels. It connects an Ethernet network or a PC.
Provides RS232 and RS422 interfaces for the communication between main
board and SMR. It receives 5 VDC and 12 VDC inputs from the power
module, of which the 5 VDC is supplied to the USB interface board and the
12 VDC is outputted to the SMR connector through a fuse.
2-13
Theory of Operation
DVI Interface Board
The DVI interface board is connected with the mother board. The following diagram shows
its interfaces to other components.
Interface Description
DVI connector Connects the secondary display.
CIS Connector Connects the CIS.
RJ 11 connector Outputs defibrillator synchronization signals.
CF Card Assembly
The CF assembly serves the non-volatile CF card which is used for data storage and
transferring. It is connected with the mother board.
2-14
Theory of Operation
2.4 Parameter Module
Each parameter module consists of the module communication board, module power board,
module button board, parameter board, etc.
2.4.1 Module Communication Board
The module communication board allows a short delay when powering up the module and
adopts FPGA to enable infrared communications between the module and the module rack. It
has no electrical connections and is therefore isolated physically. It has an ID, which will be
send to the module rack according to the pre-defined baud rate when a module is plug into
the module rack.
2.4.2 Module Power Board
Some modules have no power board. There are two kinds of module power board:
1. Isolated power board: converts the 12 V DC into a 12 V isolated DC and a 5 V isolated
DC.
2. Non-isolated power board: converts the 12 V DC into a 5 V DC
2.4.3 Module Button Board
There are keys and a LED on the module button board.
2.4.4 Parameter Board
The parameter board is a parameter measurement component, which is the most important
component of the parameter module.
2-15
Theory of Operation
2.5 SMR
The satellite module rack (SMR) is independent of the patient monitor. It provides 8 slots for
mounting parameter modules. It has the following features:
It allows a parameter module to be plugged and unplugged with the patient monitor on.
This allows function extension and patient transfer.
It does not have its own power supply. It is run by 12 V DC supplied by the patient
monitor and then supplies power supply to each parameter module via the contact
screws.
It implements communication protocol conversions between the patient monitor and
each parameter module, provides infrared communications for parameter modules, and
is responsible for detecting infrared communications malfunction for each parameter
module.
The following diagram shows the structure of the SMR.
2-16
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