Mindray PM-8000 Service Manual

Service Manual

of

PM-8000

Portable Patient Monitor

Copyright

SHENZHEN MINDRAY® BIO-MEDICAL ELECTRONICS CO., LTD. 2002

Version: 2.0

Issued date: 2005/07/24

P/N: 8000-20-10282

Statement

SHENZHEN MINDRAY

®

BIO-MEDICAL ELECTRONICS CO., LTD. (hereinafter called Mindray)

owns all rights to this unpublished work and intends to maintain this work as confidential. Mindray

may also seek to maintain this work as an unpublished copyright. This publication is to be used solely

for the purposes of reference, operation, maintenance, or repair of Mindray equipment. No part of this

can be disseminated for other purposes.

In the event of inadvertent or deliberate publication, Mindray intends to enforce its rights to this work

under copyright laws as a published work. Those having access to this work may not copy, use, or

disclose the information in this work unless expressly authorized by Mindray to do so.

All information contained in this publication 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 material. This publication may refer to information and 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.

Content of this manual is subject to changes without prior notice.

PROPERTY OF
SHENZHEN MINDRAY
ALL RIGHTS RESERVED

Responsibility on the manufacturer party

Service Manual of PM-8000 Portable Patient Monitor (V2.0) I

®

BIO-MEDICAL ELECTRONICS CO., LTD.

Mindray is responsible for safety, reliability and performance of this equipment only in the condition

that:

• all installation, expansion, change, modification and repair of this equipment are conducted by

Mindray qualified personnel; and,

• applied electrical appliance is in compliance with relevant National Standards; and,

• the monitor is operated under strict observance of this manual.

′ NOTE ′

This equipment is not intended for family usage.

Warning

This monitor is not a device for treatment purpose.

It is important for the hospital or organization that employs this equipment to carry out a reasonable

maintenance schedule. Neglect of this may result in machine breakdown or injury of human health.

Upon request, Mindray may provide, with compensation, necessary circuit diagrams, calibration

illustration list and other information to help qualified technician to maintain and repair some parts,

which Mindray may define as user serviceable.

II Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Warranty

Workmanship & Materials

Mindray guarantees new equipment other than accessories to be free from defects in workmanship and

materials for a period of one year (six months for multi-site probes and SpO2 sensor) from date of

shipment under normal use and service. Mindray's obligation under this warranty is limited to repairing,

at Mindray’s option, any part which upon Mindray's examination proves defective.

THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES,

EXPRESSED OR IMPLIED, INCLUDING WARRANTIES OF MERCHANT ABILITY OR

FITNESS FOR ANY PARTICULAR PURPOSE.

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 substitution upon it of parts or accessories not approved by

Mindray or repaired by anyone other than a Mindray authorized representative.

This warranty shall not extend to any instrument which has been subjected to misuse, negligence or

accident; any instrument from which Mindray's original serial number tag or product identification

markings have been altered or removed, or any product of any other manufacturer.

Safety, Reliability and Performance

Mindray is not responsible for the effects on safety, reliability and performance of the PM-8000

Portable Patient Monitor if:

■ assembly operations, extensions, re-adjusts, modifications or repairs are carried out by persons

other than those authorized by Mindray.

■ the PM-8000 Portable Patient Monitor is not used in accordance with the instructions for use, or

the electrical installation of the relevant room does not comply with NFPA 70: National Electric

Code or NFPA 99: Standard for Health Care Facilities (Outside the United States, the relevant

room must comply with all electrical installation regulations mandated by the local and regional

bodies of government).

Service Manual of PM-8000 Portable Patient Monitor (V2.0) III

Return Policy

Return Procedure

In the event that it becomes necessary to return a unit to Mindray, the following procedure should be

followed:

1. Obtain return authorization. Contact the Mindray Service Department and obtain a Customer

Service Authorization (Mindray) number. The Mindray number must appear on the outside of the

shipping container. Return shipments will not be accepted if the Mindray 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 equipment is shipped to

Mindray for service (this includes customs charges).

Company Contact

Address: Mindray building keji 12th road south hi-tech industrial

park nanshan Shenzhen, P.R.China

Phone: [phone]
Fax: [phone]
Free hot line: [phone]

EC Representative

Name: Shanghai International Holding Corp. GmbH(Europe)

Address: Eiffestrasse 80 D-20537 Hamburg Germany
Phone: [phone]
Fax: [phone]

IV Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Preface

This manual gives detailed description to PM-8000 Portable Patient Monitor concerning its

performance, operation, and other safety information. Reading through this manual is the first step for

the user to get familiar with the equipment and make the best out of it.

Following symbols indicates some important facts that you have to pay special attention to:

Warning Points to be noted to avoid injury to the patient and the operator.

Caution Points to be noted to avoid damage to the equipment.

′ NOTE ′ Points to be noted.

This manual is intended for persons who are trained in the use of this field and have adequate

experience in operation of monitoring equipment.

Service Manual of PM-8000 Portable Patient Monitor (V2.0) V

Content

Chapter 1 Introduction ........................................................................................................................1-1

I. General.................................................................................................................................... 1-1

II. Appearance............................................................................................................................ 1-2

2.1 Screen display ................................................................................................................. 1-2

2.2 Button Functions............................................................................................................. 1-6

2．3 Interfaces................................................................................................................... 1-8

2．4 Built-in rechargeable battery...................................................................................... 1-10

III. Hardware principle................................................................................................................ 1-11

3．1 Power board ............................................................................................................ 1-12

3．2 PM-8000 main control board .................................................................................. 1-13

3．3 Structure diagram .................................................................................................... 1-14

3．4 Description .............................................................................................................. 1-14

3．5 Button schematic diagram and principle................................................................. 1-16

3.6 Maintenance part of TR60-A recorder.......................................................................... 1-17

Chapter 2 Monitor Functions and Principles ......................................................................................2-1

I. Introduction ............................................................................................................................... 2-1

II. ECG/RESP parameters............................................................................................................. 2-2

2.1 ECG................................................................................................................................. 2-2

2.2 RESP ............................................................................................................................... 2-2

2.3 NIBP ............................................................................................................................... 2-3

2.4 SpO2 ............................................................................................................................... 2-3

2.5 TEMP.............................................................................................................................. 2-4

2.6 IBP .................................................................................................................................. 2-4

Chapter 3 Checks and Tests................................................................................................................3-1

I. System checks......................................................................................................................... 3-1

II. Testing and calibrating each parameter.................................................................................... 3-9

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

I. Disassembly graph of each part of PM-8000............................................................................. 4-1

II. Troubleshooting guidance ........................................................................................................ 4-2

Chapter 5 Installation..........................................................................................................................5-1

I. Unpack inspection................................................................................................................. 5-1

II. Preparations before power-on................................................................................................ 5-1

III. Turn on the power................................................................................................................... 5-1

IV. Other precautions.................................................................................................................... 5-1

Chapter 6 Basic Operations ................................................................................................................6-1

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1

I. Basic operation guidance........................................................................................................... 6-1

II. Use PM-8000............................................................................................................................ 6-1

Chapter 7 Cleaning and Disinfection..................................................................................................7-1

I. Maintenance checks................................................................................................................ 7-1

II. General cleaning....................................................................................................................... 7-1

III. Sterilization ............................................................................................................................. 7-2

IV. Precautions and cleaning ........................................................................................................ 7-3

V. IBP transducer cleaning and disinfection（reusable） ........................................................... 7-4

VI. TEMP sensor cleaning and disinfection (reusable) ............................................................. 7-6

Chapter 8 Maintenance .......................................................................................................................8-1

Chapter 9 Network Link .....................................................................................................................9-1

I. Network performance ............................................................................................................. 9-1

II. Application ............................................................................................................................... 9-1

Appendix I: System Alarm Prompt................................................................................................... AI-i

Appendix II: Product Specifications................................................................................................ AII-i

1. Classification...........................................................................................................................AII-i

2. Specifications..........................................................................................................................AII-i

2 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Chapter 1 Introduction

I. General

Environment:

Temperature

Working 0 ~ 40 °C

Transport and Storage -20 ~ 60 °C

Humidity

Working 15% ~ 95%

Transport and Storage 10% ~ 95%

Introduction

Altitude

Working -500 to 4,600m

Transport and Storage -500 to 13,100m

Power Supply

100~240 (V)AC, 50/60 Hz

Pmax=100VA

FUSE T 1.6A

PM-8000 Portable Patient Monitor (Figure 1-1) is adaptable to adult, pediatric and neonatal

usage. It can monitor vital signals such as ECG, Respiratory Rate, SpO2, NIBP, TEMP and IBP. It

integrates parameter measuring modules, display and recorder into one device, featuring in

compactness, lightweight and portability. Replaceable built-in battery facilitates the transportation of

patient. Large high-resolution display provides clear view of 5 waveforms and full monitoring

parameters.

PM-8000 Portable Patient Monitor performs monitoring of:

ECG

Heart Rate (HR)

2-channel ECG waveforms

Arrhythmia and S-T segment analysis（optional）

RESP

SpO2

NIBP

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-1

Respiratory Rate (RR)

Respiration Waveform

Oxygen Saturation (SpO2), Pulse Rate (PR)

SpO2 Plethysmogram

Systolic Pressure (NS), Diastolic Pressure (ND), Mean Pressure (NM)

Introduction

TEMP
IBP

PM-8000 provides extensive functions as visual & audible alarm, storage and report printout for

trend data, NIBP measurements, and alarm events, and drug dose calculation, etc.

Temperature DATA

IBP SYS, DIA, MAP

IBP waveform

II. Appearance

The POWER switch is on the right quarter of the front panel (②). The POWER indicator(④)

and the BATT indicator (③) light when the device is powered on. The ALARM indicator flashes or

lights when alarm occurs (①). Sockets for the sensors are on the right side. The recorder socket is on

the left side. Other sockets and power plug-in are at the back.。

Figure 1-1 Front view of PM-8000 Portable Patient Monitor

2.1 Screen display

The display of PM-8000 may be color or monochrome liquid crystal. (The monitor of PM-8000 is

available in both monochrome and color liquid crystal).Patient parameters, waveforms, alarm messages,

bed numbers, date, system status and error messages can be displayed on the screen.

The screen is divided into three areas: ← message area①; ↑ waveform area②; → parameter area

1-2 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Introduction

Figure 1-2 PM-8000 main screen

Message Area(①)

The Message Area is at the top of the screen and used to display operating state of the monitor and

status of the patient.

The messages and their meanings are:

【BED No】 Bed number of the patient being monitored

【3/1/2001】 Current date

【10:23:45】 Current time

【M/F】 Sex of the patient being monitored

【NAME】 name of the patient being monitored. When the user is entering patient name,

the name will be displayed at this position. If no patient name is entered, this

position will be blank.

Other information in the Message Area comes up only with respective monitoring status. They are:

1. Signs indicating the operating status of the monitor and the sensors are displayed at the right side of

time numeric. When appears, this message will cover the sex and name information of the patient.

2. “

” Indicates that all sounds are disabled manually. It appears when SILENCE button is pressed

for more than 1 seconds.

3. “！

ALARM SETUP menu, this mark appears indicating that the operator has permanently closed the

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-3

” is the sign indicating that the alarm volume is closed. When select the “OFF” option in the

Introduction

audio alarm function. This audio alarm function can resume only after the operator discharges the setup

of Close Alarm Volume.

′ NOTE ′
When “！

the operator should be careful in using this function. One method of discharging this
status is in the ALARM SETUP menu, select the item that the alarm volume is in
Non-close. Another method is to press the SILENCE button so as to make the mark

” sign appears, the system can not give any audio alarm prompt. Therefore,

change into a

restores the normal alarm status.

4. Alarm message is displayed always at the extreme right area on the screen.

5. When waveforms on the screen are frozen, “FREEZE” window appears at the bottom of the screen.

. Then press SILENCE button again, the system will immediately

Waveform/Menu Area(②)

Five waveforms can be displayed at the same time. The waveforms from up to down are: 2 channels of

ECG waveforms, SpO2 Plethysmogram, IBP, RESP (possibly coming from ECG module). Waveforms

to be displayed are user-selectable. Refer to Tracing Waveforms Selection in Operation Manual for

details.

The names of the waveforms are displayed to their left. The names of ECG and IBP are user-selectable.

Refer to Chapter ECG/RESP Monitoring and Chapter IBP Monitoring in Operation Manual for

details. Gain and filter of this ECG channel are displayed as well. A 1mv scale is marked on the right

of ECG waveform. The IBP waveform scale is displayed in IBP wave area. The three dot lines from up

to down respectively represent the highest scale, reference scale and lowest scale of the waveform.

These values can be manually set. Refer to Chapter IBP Monitoring in Operation Manual for IBP

setup.

The same menu always appears at a fixed area on the screen. When the menu is displayed, some

waveforms become invisible. The size of the menu is also fixed, covering the lowest 3, 4 or 5

waveforms. If the system exits the menu, the screen will restore its previous look.

The waveforms are refreshed in a user-set rate. Refer to the related chapters for details of sweep speed.

Parameter Area(③)

Parameters are displayed at a fixed position (①~⑩). They are (from top to bottom):

1-4 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Introduction

ECG

NIBP

SpO2

IBP

Figure 1-3 Main Screen

Heart Rate (①, Unit: bpm) ⎯

⎯

ST-segment analysis of Channel 1 & 2 (②, Unit: mv)

⎯

Arrhythmia (PVCs) events (③, Unit: event/min)

⎯

(From left to right) Systolic, Mean, Diastolic (④, Unit: mmHg or kPa)

⎯

SpO2 (⑤, Unit: %)

⎯

Blood Pressure: Systolic, Mean, and Diastolic values are displayed from left to right. (⑥,

Unit: mmHg or kPa)

RESP

⎯

Respiration Rate (⑦, Unit: breath/min)

TEMP

⎯

Temperature (⑧, Unit:℃ or ℉)

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-5

Introduction

The above monitoring results are displayed in the Parameter Area.

The parameters refresh every second, except that the NIBP value refreshes each time when the

measurement is over.

User can select the monitor parameters, and the screen display will change accordingly.

Alarm indicator and alarm status:

In normal mode, no indicator lights.

In alarm mode, the alarm indicator lights or flashes. The color of the indicator indicates the alarm level.

2.2 Button Functions

Figure 1-4 PM-8000 Buttons and Knob

All the operations of PM-8000 can be performed through using the buttons and the rotary knob at the

bottom of the screen. Above the buttons are their respective names. They are (from left to right):

①POWER

Press to turn on/off the monitor.

②FREEZE

When in normal mode, press to enter Freeze mode to freeze all the waveforms

on the screen. When in Freeze mode, press to restore the waveform

refreshing.

1-6 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Introduction

③SILENCE

Press to suspend alarm for 3 minutes (it can be selected in ALARM SETUP

menu). Press this button for more than 1 seconds to disable all sound signals

(heart, beat, pulse tone, key sound), and audio alarm. A symbol “ ” displays

in the Message Area. Press this key again to restore all sound signals and

remove the “

” symbol.

NOTE:
If new alarm occurs under Alarm Suspension/Silence state,
Suspension/Silence state will change. For specific rules, see Chapter
Alarm.

NOTE:
Whether an alarm will be reset depends on the status of the alarm cause.
But by pressing SILENCE button can permanently shut off audio sound
of the ECG Lead Off and SpO2 Sensor Off alarm.

④REC/STOP

⑤START

⑥Rotary Knob

Rotary Knob

Press to start a real time recording. The recording time is set in RT

REC TIME of RECORD submenu (Refer to related sections for

details). Press during recording to stop the recording. When in

FREEZE mode, press to select the waveforms for report printout.

Refer to Chapter Recording for details.

Press to inflate the cuff to start a blood pressure measurement. When

measuring, press to cancel the measurement and deflate the cuff.

This knob can be used to select and change the settings. Operation

can be performed by turning it clockwise, counterclockwise or

pressing it down.

The square frame that moves when the knob is being turned is called "cursor". Operation can be

executed at any place where the cursor can stay. When no menu is displayed, turning the knob

clockwise can select following hot keys:

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-7

Introduction

Channel 1 ECG lead

Channel 1 ECG gain

ECG filter

Channel 2 ECG lead

Channel 2 ECG gain

IBP Label

ECG menu

SpO2 menu

NIBP menu

IBP menu

RESP menu

TEMP menu

When the current cursor is placed at any of the first six items, the user can change the current settings.

When at any of the last six items, related parameter menu could be called up for setting changes.

2．3 Interfaces

For the convenience of operation, different interfaces are in different parts of the monitor.

Recorder is on the left side of the monitor while sockets for patient cables and sensors are on the right

side. See the figure below:

Figure 1-5 Right side view

1-8 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Introduction

This symbol means “BE CAREFUL". Refer to the manual.

Indicates that the instrument is IEC-60601-1 Type CF equipment. The unit displaying this

symbol contains an F-Type isolated (floating) patient applied part providing a high degree of

protection against shock, and is suitable for use during defibrillation.

Figure 1-6 Rear panel

Monitor interface for external： standard VGA color monitor.

Working mode: 640 × 480, 16 color, APA mode.

Signal: analog R G B 0.7 Vpp / 750 ohm

Hor. / Vert. TTL pos. / Neg.

Interface D-sub 15 pin

Pin 1. Red Video

Pin 2. Green Video

Pin 3. Blue Video

Pin 4. Ground

Pin 5. NC

Pin 6. Red Ground

Pin 7. Green Ground

Pin 8. Blue Ground

Pin 9. NC

Pin 10. Ground

Pin 11. NC

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-9

Introduction

Pin 12. NC

Pin 13 Horizontal Sync.

Pin 14. Vertical Sync.

Pin 15. NC

Appliance: (Installation)

1) Install the VGA monitor at a place at least 1.5m away from the patient.(The VGA monitor

must be installed at least 1.5m away from the patient.)This monitor is used only as an

assistant monitoring device.

2) Plug the cable into proper socket before powering on the VGA monitor.

3) It is allowable to power on the VGA monitor and PM-8000 at the same time. Or power on

PM-8000 after turning on VGA monitor.

4) Adjust brightness and contrast properly.

(Socket ④)

Equipotential grounding terminal for connection with the hospital’s grounding system.

ANALOG OUTPUT (Socket ②)

Analog signal output terminal for connection with oscillometer and pen recorder.

The connection terminal is a BNC Jack.

Network Interfaces (Socket ①): Standard RJ45 Socket.

Warning

Through network interface only MINDRAY Clinical Information Center can be connected in.

Warning

Accessory equipment connected to the analog and digital interfaces must be certified according
to the respective IEC standards (e.g. IEC 60950 for data processing equipment and IEC 60601-1
for medical equipment). Furthermore all configurations shall comply with the valid version of
the system standard IEC 60601-1-1. Everybody who connects additional equipment to the signal
input part or signal output part configures a medical system, and is therefore responsible that the
system complies with the requirements of the valid version of the system standard IEC 60601-1-1.
If in doubt, consult the technical service department or your local representative.

2．4 Built-in rechargeable battery

PM-8000 Portable Patient Monitor is equipped with a rechargeable battery. The battery in the Monitor

can automatically recharge when AC INPUT is connected until it is full. A symbol “

1-10 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

” is displayed

Introduction

on the bottom of the screen to indicate the status of recharging, in which the black part represents the

relative electric energy of the battery. If the battery is not installed in PM-8000, battery state will be

displayed as “

” to indicate the state. Under the cable socket is the battery slot with cover.

Warning

Don’t pull off battery when the monitor is working.

When operating on battery, the monitor will prompt alarm and shut off automatically when the energy

is low. When the electric energy is going out, the monitor will sound continuous level 1 alarm beeping

and display “BATTERY TOO LOW” in the Message Area. Connect the monitor to AC power at this

moment can recharge the battery while operating. If keep operating on the battery, the monitor will

shut off automatically (about 5 minutes since alarming) upon exhaustion of the battery.

Figure 1-7 Battery slot cover

III. Hardware principle

PM-8000 block diagram

TFT Disp lay

8.4 inchs

Main
Power
Input

X16

Power Supply P C B

J3

B a tte r y

VG A

interface

NET

In te rfa c e

Analog

output

800 X 600

X14

J6

X15

J5

J4

J2

TO X4

FAN

P14

P7(BDM)

P8

P5

P10

P13

NIBP

Module

Cuff

NIBP

P1

P4(TFT_DIGTAL)

P2(CRT)

P3(FOR 9000 VGA)

P12

P11

H o s t P .C .B .

P17(FOR 509C)

P15

P16

P6

P9

X5

ECG /
RESP/
TEM P
P.B.C.

X9 X10 X11 X12

TEM P

ECG

ECG

TEMP

Cable

Sensor

X6 X7

SPO 2

P.C.B.

SPO2

SpO2

Sensor

From J2

Key & Alarm P .C .B .

J7

X1

R ecorder M odule

X2

X3

R e c o rd e r P .S .

X4

X8

IB P

P.C.B.

IB P

IBP

Cable

Alarm

J9

J8

L E D

Speaker

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-11

Introduction

Figure 1-8 PM-8000 connection diagram

Following are brief description of basic function and operating principle of each part.

3．1 Power board

PM-8000 power board specifications:

AC input voltage:100~240VAC

AC input current: <1.6A

AC voltage frequency: 50/60HZ

Two-way output voltage: 5V/12V, normal working current is 1.5A for 5V, 2A for 12V.

Two-way output voltage has functions of short-circuit, over-current and over-voltage protection.

The power board has reset function.

The power board can manage the charging process of lead-acid battery (12V/2.3AH). The

charging time is about 6 hours.

Schematic diagram of power board:

AC

input

AC/DC

Battery

and

Charging

Managerent

circuit

Figure 1-9 circuit diagram of PM-8000 power board

5VDC-DC

BUCK

converter

REC POWER

SOURCE

12V output

Voltage

test

Power on/off

control circuit

Testing key points:

Connect AC power (at this time, the Charge indicator of the battery should light on).

Test before power on the monitor.

Use multimeter to measure the DC voltage of the capacitor C12, which should be within the range

of 107 ~ 354V.

Use oscillograph to measure between the PIN1 of Q1 and the negative electrode of C12, a driving

1-12 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

waveform with the frequency being about 110KHz should exist.

Use multimeter to measure the DC voltage of the capacitor C19, which should be 17.5V.

Use multimeter to measure the DC voltage of the capacitor C24, which should be 13.8V (voltage

after removing battery).

Use multimeter to measure the capacitor C47, which should be 5V.

Tests after powering on the monitor:

Use multimeter to measure the regulator ZD3 whose DC voltage should be 5V.

Use multimeter to measure the regulator ZD4 whose DC voltage should be 12V.

Use multimeter to measure the capacitor C54 whose DC voltage should be 17.2V.

3．2 PM-8000 main control board

Power supply

Introduction

Input voltage: ＋12V±5%；

＋5V±5%；

The main control board uses the COLDFIRE series embedded microprocessor 5206e

manufactured by MOTOROLA Company. It also adopts 3.3V low-voltage power supply to reduce the

power consumption. Other main components on the main control board include: Flash, SRAM, FPGA,

network controller, etc, all of which require 3.3V power. The capacity of the Flash has been increased

to 2MB, which employs two parallel-connected 512Kx16 chips and therefore uses 32-bit character

width to support CPU to operate at the highest possible speed instead of accessing to DRAM for

operation. The main control board has also a 4MB memory, which is made up of two

parallel-connected 1M ×16-bit chips. Because no executing program is required to be loaded, only

one RTC is used. This chip uses one 225maH dry cell as the spare power supply. In addition, one 2KB

2

E

PROM is used to store parameters. The main control board supports a resolution of 800x600 and

provides three interfaces: a LVDS interface, a 6BIT DIGITAL interface, and a VGA interface. The

monitor displays both characters and waveforms in an overlapping way on the whole screen in the

same color. The characters and waveforms can be browsed in a scrolling way. The support system

needs 10 serial ports, and the baud rate (4800/9600/19.2k/38.4k/76.8k) can be online selected by

software and interface buffer drives. The main control board adopts the network controller AX88796

(3.3V, 10MHz), which has inside 16K high-speed buffer SRAM. The MAX5102 8-bit single-way D/A

converter is used to fulfil analog output. 5V and 12V stabilized voltage supplies are introduced from

the power board, and therefore 3.3V and 2.5V working supplies are respectively generated. Among

them, 2.5V is to be used for the internal verification of FPGA.

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-13

Introduction

3．3 Structure diagram

FPGA

RTC/E2PRO

M/Watch

Display

driving
circuit

Interrupt
manageme
nt circuit

DRAM

CPU

Multi-way
serial

Figure 1-10 Structure diagram

3．4 Description

Flash/

SRAM

Network

controller

Audio

alarm/spare
battery

3.3V low-voltage power supply component is adopted. The external power is 5V, which is converted

by the DC/DC converter into 3.3V and 2.5V, the latter voltage being especially used for FPGA. The

main control board are connected with the external devices via following interfaces and input: the

power supply connected with the interface board, the 9-way serial port, TFT interface, analog VGA

interface, network interface, analog output and a spare serial port, etc. The BDM interface is reserved

on the board for the aim of software testing and download.

■ CPU

It use Coldfire5206e. Clock rate is 54MHz, working voltage is 3.3V.

■ FLASH

It use tow parallel-connected 512Kx16 FLASH memories. The output terminal PP1 of CPU is used to

realize write-protection of FLASH. It is effective in low-level state.。

■ DRAM

PM-8000 main control board uses two parallel-connected 1Mx16 DRAM, which construct 4M address

space.

■ Display

The resolution is 800x600. Frequency is 38MHz. It works in an appropriate SVGA mode. VRAM

adopts 16-bit structure and is divided into character screen and waveform screen. On the left side of the

1-14 Service Manual of PM-8000 Portable Patient Monitor (V2.0)

Introduction

character screen is the corresponding waveform screen. The right side to the character screen is used to

display data and flashing alarms. The user can select color and dot energy. Besides the user can scroll

the waveform for clear and complete observation.

■ LVDS interface

Through the way of time-sharing sampling, the LVDS interface converts multi-way CMOS/TTL

signals into one-way low-voltage double-frequency difference signals, which are further to be output to

the outside). LVDS interface is generally realized by special integrated circuit. The special LVDS chip

used for display is DS90CF363A. This chip converts 18-way display pixel signals and 3-way display

control signals with a total of 21-way messages into 3-way LVDS signals. Four ways of difference

signals including these 3 ways of signals and a way of phase-locked frequency are transmitted to the

display screen. On the one side of the screen, these signals are restored for driving the screen. The

working frequency of DS90CF363A is 20~65MHz.

■ Reset and parameter storage

The main control board uses an integrated chip CS124C161, which has the functions of both power-on

reset and parameter storage. This chip has a E

2

PROM with the capacity of 2K. It can be used to

on-line modify and store various nonvolatile parameters of the host. The power-on reset and

WATCHDOG functions are used to realize reset function of the main control board. When J1 is open

circuit, the software can also disable WATCHDOG by using the output wire PP0 of CPU in order to

realize the selftest of WATCHDOG. The bus interface of this chip is I

2

C.

■ Data storage

The Main control board uses one non-power-down SRAM having its internal battery to store

monitoring data. Its capacity is 2M.

■ Network controller

The network controller adopts special chip AX88796. Its working clock is 25MHz. It also has internal

16K high-speed buffer SRAM. The data bus of this chip is 16-bit width.

Service Manual of PM-8000 Portable Patient Monitor (V2.0) 1-15