Nihon Kohden BSM-2300 User manual

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BSM- 2301A BSM- 2301K BSM- 2303K BSM- 2304A

WS- 231P

QI- 231P QI- 236P

SERVICE MANUAL

BEDSIDE MONITOR

BSM-2300A/K

0634-001878B

BSM- 2301A BSM- 2301K BSM- 2303K BSM- 2304A

WS- 231P

QI- 231P QI- 236P

BEDSIDE MONITOR

BSM-2300A/K

0634-001878B

Model: BSM-2300A/K

Manual code no.: 0634-001878B

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Contents

EMC Related Caution ....................................................................................................i

Conventions Used in this Manual and Instrument ...................................................... iii

Warnings, Cautions and Notes ......................................................................... iii

Explanations of the Symbols in this Manual and Instrument ........................... i v

On panels ..........................................................................................................i v

On screen.......................................................................................................... v

Others................................................................................................................ v

Section 1 General....................................................................................1C.1

Introduction ......................................................................................................................... 1.1

General Information on Servicing ...................................................................................... 1.2

Service Policy, Service Parts and Patient Safety Checks ................................................ 1.4

Service Policy .......................................................................................................... 1.4

Service Parts ........................................................................................................... 1.4

Patient Safety Checks .............................................................................................. 1.5

Specifications ..................................................................................................................... 1.6

Display ........................................................................................................... 1.6

Sound ............................................................................................................. 1.6

Alarm .............................................................................................................. 1.6

ECG ................................................................................................................ 1.6

Respiration (Transthoracic impedance pneumography) ................................ 1.7

SpO2 on BSM-2301A/K and BSM-2303K ...................................................... 1.8

SpO2 on BSM-2304A ..................................................................................... 1.8

Non Invasive Blood pressure, NIBP .............................................................. 1.8

Temperature ................................................................................................... 1.9

Multi-parameter Amplifier............................................................................... 1.9

Invasive Blood Pressure, IBP ........................................................................ 1.9

Respiration (Thermistor method) ................................................................... 1.9

Expired Carbon Dioxide Tension, CO2.......................................................... 1.10

Trendgraph .................................................................................................... 1.10

Vital Signs List ..............................................................................................1.10

Recorder Module (optional, WS-231P) .........................................................1.10

Interface (optional, QI-231P)......................................................................... 1.11

Interface (optional, QI-236P)......................................................................... 1.11

External Output .............................................................................................1.11

Power Requirement .......................................................................................1.11

Clock Accuracy .............................................................................................1.12

Environment ..................................................................................................1.12

Dimensions and Weight (approximate) .........................................................1.12

Electromagnetic Compatibility ......................................................................1.12

Safety Standard .............................................................................................1.12

Composition....................................................................................................................... 1.13

Panel Descriptions ............................................................................................................1.14

Service Manual BSM-2300 C.1

CONTENTS

Front Panel ..............................................................................................................1.14

Left Side Panel ........................................................................................................1.16

BSM-2301A/K and BSM-2303K..................................................................... 1.16

BSM-2304A ...................................................................................................1.17

Right Side Panel ......................................................................................................1.18

Storage and Transport ....................................................................................................... 1.19

Storage ....................................................................................................................1.19

Transport .................................................................................................................1.19

Hard Keys and Soft Keys ..................................................................................................1.20

Hard Keys ................................................................................................................1.20

Soft Keys .................................................................................................................1.20

Upgrading the System Software and Changing Language on the Screen ........................1.21

Procedure ...................................................................................................... 1.21

Block Diagram ................................................................................................................... 1.22

BSM-2300 ................................................................................................................ 1.22

WS-231P Recorder Module ....................................................................................1.23

QI-231P Interface ....................................................................................................1.24

QI-236P Interface ....................................................................................................1.25

Section 2 Troubleshooting ..................................................................... 2C.1

General ............................................................................................................................... 2.1

Power-Related Problems .................................................................................................... 2.2

Display Problems ............................................................................................................... 2.3

Sound Problems ................................................................................................................. 2.4

Key Operation Problems .................................................................................................... 2.4

ECG and Respiration by Impedance Method Problems .................................................... 2.5

SpO2 Problems .................................................................................................................. 2.6

Non-invasive Blood Pressure Problems ............................................................................ 2.7

Temperature Problems ....................................................................................................... 2.8

Other Vital Sign Input Problems ......................................................................................... 2.9

Option Problems ................................................................................................................ 2.10

Recording Problems ..........................................................................................................2.11

QI-231P Interface Problems .............................................................................................. 2.13

QI-236P Interface Problems .............................................................................................. 2.13

Section 3 Diagnostic Check ...................................................................3C.1

Introduction ......................................................................................................................... 3.1

Power On Self Check ......................................................................................................... 3.2

Calling Up the DIAGNOSTIC CHECK Screen ................................................................... 3.4

Calling Up the Error History ............................................................................................... 3.5

Error Codes .............................................................................................................. 3.5

System Errors .......................................................................................................... 3.6

Initializing the System ........................................................................................................ 3.7

Performing Manual Check and Other Checks .................................................................... 3.8

Calling Up the MANUAL CHECK MENU Screen ..................................................... 3.9

CPU Check Menu Items ......................................................................................... 3.10

ROM Check................................................................................................... 3.10

C.2 Service Manual BSM-2300

CONTENTS

RAM Check ...................................................................................................3.11

Hard Key Check ............................................................................................3.12

Touch Key Check ..........................................................................................3.13

Sound Check ................................................................................................. 3.14

ALARM INDICATOR Check .......................................................................... 3.15

OTHER Check ...............................................................................................3.16

MEMORY CARD Check ................................................................................3.17

Backlight Check ............................................................................................3.18

CRTC Check Menu Items .......................................................................................3.19

GRAPHIC MEMORY Check and CHARACTER MEMORY Check ...............3.19

GRAPHIC DRAW Check ...............................................................................3.20

CHARACTER DRAW Check ......................................................................... 3.22

IMAGE DRAW Check ....................................................................................3.24

DPU Check Menu Items ......................................................................................... 3.25

D/A ADJUST .................................................................................................3.25

AD TEST .......................................................................................................3.26

ZB I/F Check .................................................................................................3.27

NIBP Check................................................................................................... 3.28

DPU ROM Check ..........................................................................................3.38

DPU RAM Check .......................................................................................... 3.39

Power FREQ .................................................................................................3.40

APU Check Menu Items .......................................................................................... 3.41

APU ROM Check ..........................................................................................3.41

APU RAM Check........................................................................................... 3.42

COM Check Menu Items.........................................................................................3.43

WS RECORDER Check ................................................................................3.43

SERIAL I/F Check ......................................................................................... 3.44

NETWORK CARD Check.............................................................................. 3.45

BATTERY Check ........................................................................................... 3.47

MULTI PARAMETER UNIT Check ................................................................3.48

ECG Check ...................................................................................................3.49

OUTPUT Check ............................................................................................3.49

Recorder and Control Block Checks ...................................................................... 3.50

SELF-TEST-PRO No.1 ..................................................................................3.50

SELF-TEST-PRO No.2 ..................................................................................3.51

SELF-TEST-PRO No.3 ..................................................................................3.52

Calibration of Touch Screen .................................................................................... 3.53

Section 4 Board/Unit Description .......................................................... 4C.1

MAIN Board ........................................................................................................................ 4.1

Analog Board ...................................................................................................................... 4.5

ECG/RESP Block ..................................................................................................... 4.5

SpO2 and MP Blocks ............................................................................................... 4.6

SpO2 Block .................................................................................................... 4.6

MP Block ........................................................................................................ 4.7

IBP Board ........................................................................................................................... 4.8

NIBP Board ......................................................................................................................... 4.9

Power Supply Block........................................................................................................... 4.10

Service Manual BSM-2300 C.3

CONTENTS

LCD Unit ............................................................................................................................4.11

Recorder Module (Option) ................................................................................................. 4.12

REC MAIN Board .................................................................................................... 4.12

Recorder Unit ..........................................................................................................4.13

Interface (Option, QI-231P) ............................................................................................... 4.14

ECG, QRS Synch or Alarm Trigger Signal Output Block .......................................4.15

Serial Data Communication Relay Block ................................................................4.15

RGB Relay Block..................................................................................................... 4.15

Interface (Option, QI-236P) ............................................................................................... 4.16

ECG and QRS Synch Trigger Signal Output Block................................................. 4.17

RGB Relay Block..................................................................................................... 4.17

Section 5 Disassembly and Assembly ..................................................5C.1

Removing the Chassis Block ............................................................................................. 5.1

Replacing the MAIN Board ................................................................................................. 5.6

Replacing the Analog Board ..............................................................................................5.10

Replacing the NIBP Board ................................................................................................5.12

Replacing the IBP Board ...................................................................................................5.13

Replacing the Inverter Board ............................................................................................5.14

Replacing the LCD Unit ..................................................................................................... 5.16

Replacing the Lithium Battery ...........................................................................................5.18

Replacing the Backlight Lamp Unit ...................................................................................5.19

Replacing the Battery Pack............................................................................................... 5.22

When the Recorder Module is Not Attached to the Instrument .............................. 5.22

When the Recorder Module is Attached to the Instrument ....................................5.24

Replacing the IO ANALOG OUT or IO CT OUT Board of the Optional Interface ............. 5.26

Section 6 Maintenance ...........................................................................6C.1

To Be Replaced Periodically ............................................................................................... 6.1

Required Tools .................................................................................................................... 6.1

Measuring and Test Equipment .......................................................................................... 6.2

Maintenance Check Items and Schedule........................................................................... 6.3

External .................................................................................................................... 6.3

Input Conditions ....................................................................................................... 6.3

Operation .................................................................................................................. 6.4

Display...................................................................................................................... 6.4

Recorder................................................................................................................... 6.4

Interface ................................................................................................................... 6.5

Vital Sign Parameters .............................................................................................. 6.5

Power ........................................................................................................................ 6.6

Data Backup ............................................................................................................. 6.6

Safety........................................................................................................................ 6.7

Others ....................................................................................................................... 6.7

C.4 Service Manual BSM-2300

CONTENTS

Section 7 Adjustment .............................................................................7C.1

Sensors in the Recorder Unit ............................................................................................. 7.1

Adjusting the Output Voltages with Digital or Analog Multimeter ............................ 7.1

Section 8 Replaceable Parts List ...........................................................8C.1

Bedside Monitor BSM-2300................................................................................................ 8.2

Optional Recorder Module WS-231P ................................................................................. 8.8

RG-922P Recorder Unit ....................................................................................................8.10

QI-231P Interface ..............................................................................................................8.12

QI-236P Interface ..............................................................................................................8.13

Section 9 Connector Pin Assignment ....................................................9C.1

MAIN Board ........................................................................................................................ 9.1

CN0201 (for Alarm Indicator board)............................................................... 9.1

CN0202 (for CN101 on Operation board)....................................................... 9.1

CN0204 (for CN001 on REC MAIN board of optional recorder module) ....... 9.2

CN0205 (for CN002 on REC MAIN board of optional recorder module) ....... 9.3

CN401 (for power supply unit) ....................................................................... 9.3

CN0601 (for program card or network card).................................................. 9.4

CN0701 (for touch screen)............................................................................. 9.5

CN0801 (AUX socket) .................................................................................... 9.5

CN0802 (for Inverter board) ........................................................................... 9.6

CN1001 (for LCD unit) ................................................................................... 9.7

CN1401 (for rechargeable battery pack) ....................................................... 9.8

CN1501 (for CN901 on Analog board) ........................................................... 9.8

CN1502 (for CN0101 on NIBP board) ............................................................ 9.9

Alarm Indicator Board ....................................................................................................... 9.10

CN0101 (for CN0201 on MAIN board) ..........................................................9.10

Analog Board .....................................................................................................................9.11

CN502 ............................................................................................................ 9.11

CN601 (for CN001 on IBP board)..................................................................9.11

CN602 ............................................................................................................ 9.12

CN901 (for CN1501 on MAIN board) ............................................................9.12

CN902 (for ZB-900P transmitter) .................................................................. 9.12

NIBP Board ........................................................................................................................ 9.13

CN0101 (for CN1502 on MAIN board) ..........................................................9.13

CN0102 (for Hall Sensor board) ....................................................................9.13

CN0103 (for line frequency detection coil wire) ........................................... 9.13

CN0104 (for pediatric valve) .........................................................................9.13

CN0105 (for safety circiut valve) ..................................................................9.13

CN0106 (for pump) ........................................................................................ 9.14

CN0107 (for speaker).................................................................................... 9.14

CN0108 (for adult valve) ...............................................................................9.14

IBP Board ..........................................................................................................................9.14

CN001 (for CN601 on Analog board) ............................................................9.14

Operation Board ................................................................................................................ 9.15

CN101 (for CN0202 on MAIN board) ............................................................9.15

CN102 (for CN103 on Power SW board) ...................................................... 9.15

Service Manual BSM-2300 C.5

CONTENTS

Power SW Board ............................................................................................................... 9.16

CN0103 (for CN102 on Operation board)...................................................... 9.16

Inverter Board ................................................................................................................... 9.16

CN1 (for CN0802 on MAIN board) ................................................................ 9.16

CN2 (for backlight) ........................................................................................ 9.16

Hall Sensor Board ............................................................................................................. 9.17

CN101 (for CN102 on NIBP board) ...............................................................9.17

REC MAIN Board ..............................................................................................................9.17

CN001 (for CN0204 on MAIN board) ............................................................9.17

CN002 (for CN0205 on MAIN board) ............................................................9.17

CN003 (for CN103 on REC Power board) .....................................................9.17

REC Key Board .................................................................................................................9.18

CN201 (for CN104 on REC Power board) .....................................................9.18

REC Power Board.............................................................................................................. 9.18

CN101 (for recorder unit) .............................................................................. 9.18

CN102 (for recorder unit) .............................................................................. 9.19

CN103 (for CN003 on REC MAIN board)...................................................... 9.19

CN104 (for CN201 on REC Key board)......................................................... 9.19

IO ANALOG OUT Board ...................................................................................................9.20

CN001 ............................................................................................................ 9.20

CN002 ............................................................................................................ 9.20

CN005 ............................................................................................................ 9.20

CN003 ............................................................................................................ 9.21

CN004 ............................................................................................................ 9.21

IO CT OUT Board .............................................................................................................. 9.22

CN002 ............................................................................................................ 9.22

CN003 ............................................................................................................ 9.22

C.6 Service Manual BSM-2300

EMC RELATED CAUTION

This equipment and/or system complies with the International Standard IEC60601-1-2 for electromagnetic

compatibility for medical electrical equipment and/or system. However, an electromagnetic environment that

exceeds the limits or levels stipulated in the IEC60601-1-2, can cause harmful interference to the equipment

and/or system or cause the equipment and/or system to fail to perform its intended function or degrade its

intended performance. Therefore, during the operation of the equipment and/or system, if there is any

undesired deviation from its intended operational performance, you must avoid, identify and resolve the

adverse electromagnetic effect before continuing to use the equipment and/or system.

The following describes some common interference sources and remedial actions:

1. Strong electromagnetic interference from a nearby emitter source such as an authorized radio station or

cellular phone:

Install the equipment and/or system at another location if it is interfered with by an emitter source such

as an authorized radio station. Keep the emitter source such as cellular phone away from the equipment

and/or system.

2. Radio-frequency interference from other equipment through the AC power supply of the equipment and/

or system:

Identify the cause of this interference and if possible remove this interference source. If this is not

possible, use a different power supply.

3. Effect of direct or indirect electrostatic discharge:

Make sure all users and patients in contact with the equipment and/or system are free from direct or

indirect electrostatic energy before using it. A humid room can help lessen this problem.

4. Electromagnetic interference with any radio wave receiver such as radio or television:

If the equipment and/or system interferes with any radio wave receiver, locate the equipment and/or

system as far as possible from the radio wave receiver.

If the above suggested remedial actions do not solve the problem, consult your Nihon Kohden Corporation

subsidiary or distributor for additional suggestions.

The CE mark is a protected conformity mark of the European Community. The products herewith comply

with the requirements of the Medical Device Directive 93/42/EEC.

The CE mark only applies to the BSM-2300K bedside monitor.

This equipment complies with International Standard IEC60601-1-2 (1993) which requires CISPR11, Group 1,

Class B. Class B EQUIPMENT is equipment suitable for use in domestic establishments and in

establishments directly connected to a low voltage power supply network which supplies buildings used for

domestic purposes.

Service Manual BSM-2300 i

This page is intentionally left blank.

ii Service Manual BSM-2300

Conventions Used in this Manual and Instrument

Warnings, Cautions and Notes

Warnings, cautions and notes are used in this manual to alert or signal the reader to specific information.

WARNING

A warning alerts the user to the possible injury or death associated with the use or misuse of the

instrument.

CAUTION

A caution alerts the user to possible injury or problems with the instrument associated with its use or

misuse such as instrument malfunction, instrument failure, damage to the instrument, or damage to other

property.

NOTE

A note provides specific information, in the form of recommendations, prerequirements, alternative methods

or supplemental information.

Service Manual BSM-2300 iii

Explanations of the Symbols in this Manual and Instrument

The following symbols found in this manual/instrument bear the respective descriptions as given.

On panel

Symbol Description Symbol Description

AC operation Data input/output

“On” only for a part of instrument Input/output terminal

“Off” only for a part of instrument Output terminal

Battery operation Alternating current

Battery charging Equipotential terminal

Alarm suspend Year of manufacture

NIBP Serial number

NIBP interval Splash-proof equipment

NIBP start Watertight equipment

NIBP stop Protective earth

Menu High voltage

Home (monitoring screen)

Attention, consult operator’s manual

Defibrillation-proof type CF applied part

IPX4

IPX7

The CE mark is a protected conformity mark of the European Community. The products herewith comply with the requirements of the Medical Device Directive 93/42/EEC.

Record start/stop (on the WS-231P recorder module)

Defibrillation-proof type BF applied part

The CE mark only applies to BSM-2301K/2303K monitors.

iv Service Manual BSM-2300

Out of paper (on the WS-231P recorder module)

On screen

Symbol Description Symbol Description

Alarm silence with remaining minutes

QRS/pulse sync mark

Alarm off Respiration sync mark

Alarm recording off Value out of range

Recording Current measuring value

Paper magazine open Adjust setting/Scroll data

Out of paper Touch screen calibration mark

Network communicating Waveform cascaded

Others

Symbol Description

Recycle (On battery pack)

Ni-MH

Service Manual BSM-2300 v

Section 1 General

Introduction ........................................................................................................................ 1.1

General Information on Servicing ..................................................................................... 1.2

Service Policy, Service Parts and Patient Safety Checks ............................................... 1.4

Service Policy ......................................................................................................... 1.4

Service Parts .......................................................................................................... 1.4

Patient Safety Checks ............................................................................................. 1.5

Specifications .................................................................................................................... 1.6

Display .......................................................................................................... 1.6

Sound ............................................................................................................ 1.6

Alarm ............................................................................................................. 1.6

ECG ............................................................................................................... 1.6

Respiration (Transthoracic impedance pneumography) ............................... 1.7

SpO2 on BSM-2301A/K and BSM-2303K ..................................................... 1.8

SpO2 on BSM-2304A .................................................................................... 1.8

Non Invasive Blood pressure, NIBP ............................................................. 1.8

Temperature .................................................................................................. 1.9

Multi-parameter Amplifier.............................................................................. 1.9

Invasive Blood Pressure, IBP ....................................................................... 1.9

Respiration (Thermistor method) .................................................................. 1.9

Expired Carbon Dioxide Tension, CO2......................................................... 1.10

Trendgraph ................................................................................................... 1.10

Vital Signs List .............................................................................................1.10

Recorder Module (optional, WS-231P) ........................................................1.10

Interface (optional, QI-231P)........................................................................ 1.11

Interface (optional, QI-236P)........................................................................ 1.11

External Output ............................................................................................1.11

Power Requirement ......................................................................................1.11

Clock Accuracy ............................................................................................1.12

Environment .................................................................................................1.12

Dimensions and Weight (approximate) ........................................................1.12

Electromagnetic Compatibility .....................................................................1.12

Safety Standard ............................................................................................ 1.12

Composition...................................................................................................................... 1.13

Panel Descriptions ...........................................................................................................1.14

Service Manual BSM-2300 1C.1

Front Panel .............................................................................................................1.14

Left Side Panel .......................................................................................................1.16

BSM-2301A/K and BSM-2303K.................................................................... 1.16

BSM-2304A ..................................................................................................1.17

Right Side Panel .....................................................................................................1.18

Storage and Transport ...................................................................................................... 1.19

Storage ...................................................................................................................1.19

Transport ................................................................................................................1.19

Hard Keys and Soft Keys ................................................................................................. 1.20

Hard Keys ...............................................................................................................1.20

Soft Keys ................................................................................................................1.20

Upgrading the System Software and Changing Language on the Screen .......................1.21

Procedure .....................................................................................................1.21

Block Diagram .................................................................................................................. 1.22

BSM-2300 ...............................................................................................................1.22

WS-231P Recorder Module ...................................................................................1.23

QI-231P Interface ...................................................................................................1.24

QI-236P Interface ...................................................................................................1.25

1C.2 Service Manual BSM-2300

Introduction

1. GENERAL

This service manual provides useful information to qualified personnel to

understand, troubleshoot, service, maintain and repair the BSM-2300 bedside

monitor (referred to as “the instrument” in this service manual).

All replaceable parts or units of this instrument are clearly listed with exploded

illustration to help you locate the parts quickly.

The “Maintenance” section in this service manual describes the maintenance that

should be performed by qualified service personnel. The “Maintenance” section in

the operator’s manual describes the maintenance that can be performed by the user.

The information in the operator’s manual is primarily for the user. However, it is

important for service personnel to thoroughly read the operator’s manual and

service manual before starting to troubleshoot, service, maintain or repair this

instrument. This is because service personnel need to understand the operation of

the instrument in order to effectively use the information in the service manual.

Service Manual BSM-2300 1.1

1. GENERAL

General Information on Servicing

Note the following information when servicing the instrument.

Safety

••

• There is the possibility that the outside surface of the instrument,

••

such as the operation keys, could be contaminated by contagious

germs, so disinfect and clean the instrument before servicing it.

When servicing the instrument, wear rubber gloves to protect

yourself from infection.

••

• There is the possibility that when the lithium battery is broken, a

••

solvent inside the lithium battery could flow out or a toxic substance

inside it could come out. If the solvent or toxic substance touches

your skin or gets into your eye or mouth, immediately wash it with a

lot of water and see a physician.

CAUTION

Liquid Ingress

The instrument is not drip-proof, so do not install the instrument where

water or liquid can get into or fall on the instrument. If liquid

accidentally gets into the instrument or the instrument accidentally

drops into liquid, disassemble the instrument, clean it with clean water

and dry it completely. After reassembling, verify that there is nothing

wrong with the patient safety checks and function/performance checks.

If there is something wrong with the instrument, contact your Nihon

Kohden representative to repair.

Environmental Safeguards

Depending on the local laws in your community, it may be illegal to

dispose of the lithium battery and CRT unit in the regular waste

collection. Check with your local officials for proper disposal

procedures.

Disinfection and Cleaning

To disinfect the outside surface of the instrument, wipe it with a non-

abrasive cloth moistened with any of the disinfectants listed below. Do

not use any other disinfectants or ultraviolet rays to disinfect the

instrument.

- Chlorohexidine gluconate solution: 0.5%

- Benzethonium chloride solution: 0.2%

- Glutaraldehyde solution: 2.0%

- Benzalkonium chloride: 0.2%

- Hydrochloric alkyldiaminoethylglycine: 0.5%

1.2 Service Manual BSM-2300

1. GENERAL

Transport

••

• Use the specified shipment container and packing material to

••

transport the instrument. If necessary, double pack the instrument.

Also, put the instrument into the shipment container after packing so

that the buffer material does not get into the inside of the instrument.

••

• When transporting the board or unit of the instrument, be sure to use

••

a conductive bag. Never use an aluminum bag when transporting the

power board, power unit or board on which a lithium battery is

mounted. Also, never use a styrene foam or plastic bag which

generates static electricity to wrap the board or unit of the

instrument.

Handling the Instrument

••

• Because the outside surface of the instrument is made of resin, the

••

outside surface of the instrument is easily damaged. So when

handling the instrument, remove clutter from around the instrument

and be careful to not damage the instrument or get it dirty.

••

• Because most of the boards in the instrument are multilayer boards

••

with surface mounted electrical devices (SMD), when removing and

soldering the electrical devices, a special tool is required. To avoid

damaging other electrical components, do not remove and solder

SMD components yourself.

Measuring and Test Equipment

Maintain the accuracy of the measuring and test equipment by

checking and calibrating it according to the check and calibration

procedures.

Service Manual BSM-2300 1.3

1. GENERAL

Service Policy, Service Parts and Patient Safety Checks

Service Policy

Our technical service policy for this instrument is to replace the faulty unit, board

or part or damaged mechanical part with a new one. Do not perform electrical

device or component level repair of the multilayer board or unit. We do not support

component level repair outside the factory for the following reasons:

• Most of the boards are multilayer boards with surface mounted electrical

devices, so the mounting density of the board is too high.

• A special tool or high degree of repair skill is required to repair the multilayer

boards with surface mounted electrical devices.

Disassemble the instrument or replace a board or unit in an environment where the

instrument is protected against static electricity.

As background knowledge for repair, pay special attention to the following:

• You can reduce the repair time by considering the problem before starting repair.

• You can clarify the source of most of the troubles using the information from the

diagnostic check function of the instrument. Refer to “Diagnostic Check “ of this

manual.

Service Parts

Refer to “Replaceable Parts List” of this manual for the service parts for technical

service that we provide.

NOTE

When ordering parts or accessories from your Nihon Kohden

representative, please quote the NK code number and part name which

is listed in this service manual, and the name or model of the unit in

which the required part is located. This will help us to promptly attend

to your needs. Always use parts and accessories recommended or

supplied by Nihon Kohden Corporation to assure maximum

performance from your instrument.

1.4 Service Manual BSM-2300

1. GENERAL

Patient Safety Checks Periodic maintenance procedures and diagnostic check procedures are provided in

this manual to ensure that the instrument is operating in accordance with its design

and production specifications. To verify that the instrument is working in a safe

manner with regard to patient safety, patient safety checks should be performed on

the instrument before it is first installed, periodically after installation, and after any

repair is made on the instrument.

For patient safety checks, perform the following checks as described in the

International Electrotechnical Commission’s standard, IEC60601-1 (1988):

• Protective earth resistance check

• Earth leakage current check

• Enclosure leakage current check

• Patient leakage current check

• Withstanding voltage check

Service Manual BSM-2300 1.5

1. GENERAL

Specifications

Display

Display size: 8.4 inch, TFT type color LCD

Waveform display mode: Non-fade moving or non-fade fixed Viewing area: 170.4 mm × 127.8 mm Resolution: 800 × 600 dots

Maximum number of waveform trace: BSM-2301A/K: 5 traces

BSM-2303K/2304A: 6 traces

Sweep speed: 25 mm/s, 50 mm/s (Respiration and CO2 low speed: 1.56 mm/s)

Sweep time: about 124 mm (5 s, at 25 mm/s sweep speed)

Waveform display color: 12

Numeric display color: 12

Waveform freeze: Provided

Display waveforms: ECG, respiration, IBP, SpO2 pulse wave and CO

Numerical data display: Heart rate, VPC rate, ST level, respiration rate, IBP (systolic, diastolic, mean), NIBP

(systolic, diastolic, mean), SpO2, pulse rate, temperature and ETCO

Synchronization mark: Heart rate sync mark, pulse rate sync mark, respiratory sync mark

Sound

Sound type: Alarm, synchronization, click

Alarm sound: 3 types

Synchronization sound: Pitch variable for IBP and SpO

Alarm

Alarm items: Upper/lower limits alarm, apnea alarm, arrhythmia alarm, connector disconnection

alarm, noise alarm, electrode off alarm, pulse waveform detecting alarm, probe off

alarm, cuff/hose check alarm, sensor check alarm, battery weak alarm, operating

environment alarm

Alarm levels: Crisis (red blinking), Warning (yellow blinking), Advisory (yellow lighting)

Alarm indication: Alarm indicator, highlighted message, alarm sound

Alarm suspend: Provided (for 1 or 2 min)

ECG

Electrode offset potential tolerance: ±500 mV

Input dynamic range: ± 5 mV Internal noise: ≤30 µVp-p (Refer to input) Common mode rejection ratio: ≥95 dB Input impedance ≥5 MΩ (at 10 Hz) Input bias current: ≤100 nA

Heart rate count

Calculation method: Moving average/Instantaneous beat to beat (selectable)

Counting range: 0, 12 to 300 beats/min (±2 beats/min)

Arrhythmia analysis

Analysis method: Template matching method

Number of channels: 1 channel

VPC counting rate: 0 to 99 VPCs/min

1.6 Service Manual BSM-2300

1. GENERAL

Arrhythmia message: ASYSTOLE, VT, VF, VPC RUN, COUPLET, EARLY VPC, BIGEMINY, FREQ VPC,

TACHYCARDIA, BRADYCARDIA

Arrhythmia recall:

Number of recall files: 16

Storage time per file: 8 s

ST level measurement:

Number of measurement channels:1 ch

Measuring range: ±2.5 mV

Alarm limits: ±2.0 mV in 0.01 mV steps, OFF

Pacemaker pulse rejection capability: 0.1 to 2 ms, ±2 to 700 mV

ANSI/AAMI EC 13-1992 compatible

Pacing pulse detection ON/OFF

Defibrillation-proof: ECG input protected against 400 J

IEC 60601-2-27 17.101 compatible

ESU interference filter: Provided Filters ON: Time constant 0.5 s, AC hum filter 0.3 to 23 Hz (> −3 dB), ≤ −16 dB (50 Hz or

60 Hz)

OFF: Time constant 3.2 s, 0.05 to 150 Hz (> −3 dB)

Lead:

3-electrode cable: I, II, III

6-electrode cable: I, II, III, aVR, aVL, aVF, V4, V5

Waveform display:

Display sensitivity: 10 mm/mV ±5% (at ×1 sensitivity) Sensitivity control: ×1/4, ×1/2, ×1, ×2, ×4, or AUTO

Pacing spike display: Available

Heart rate display update cycle: Every 3 s or when alarm is generated

Alarm items:

Upper limit range: 20 to 300 beats/min in 5 beats/min steps, OFF

Lower limit range: OFF, 15 to 295 beats/min in 5 beats/min steps

Alarm items: TACHYCARDIA, BRADYCARDIA, ASYSTOLE

Respiration (Transthoracic impedance pneumography)

Measuring lead: R-F or R-L Measuring impedance available range: 0 to 2 kΩ Internal noise: ≤0.2 Ω (Refer to input) Excitor current: 30 ±10 µArms at 40 kHz Frequency response: 3.0 Hz ±1 Hz (−3 dB) (Hardware specification)

Time constant: 1.5 s ±0.5 s (Hardware specification)

Respiration counter counting range: 0 to 150 breaths/min

Respiration rate counting accuracy: ±2 breaths/min

Defibrillation proof: Respiration input protected against 400 J discharge

Waveform display:

Display sensitivity: 10 mm/Ω ±20% (at ×1 sensitivity, Zo=480 Ω) Sensitivity control: ×1/4, ×1/2, ×1, ×2, ×4

Measurement On/Off: Available

Respiration rate display update cycle: Every 3 s or when alarm is generated

Alarm:

Upper limit range: 2 to 150 breaths/min in 2 breaths/min steps, OFF

Lower limit range: OFF, 0 to 148 breaths/min in 2 steps

Apnea time: OFF, 5 to 40 s in 5 s steps

Service Manual BSM-2300 1.7

1. GENERAL

SpO

on BSM-2301A/K and BSM-2303K

Measuring range: 50 to 100%

Pulse rate counting range: 0, 30 to 300 beats/min

SpO2 accuracy: ±2 digits (80% ≤ SpO2 ≤ 100%)

±3 digits (50% ≤ SpO2 < 80%)

SpO2 display:

Pulse rate display update cycle: Every 3 s or when alarm is generated

Sync tone modulation: Change in 20 steps at 81 to 100% SpO

Waveform sensitivity: ×1/8, ×1/4, ×1/2, ×1, ×2, ×4, ×8

Alarm:

Upper limit range: 51 to 100% SpO2 in 1% SpO2 steps, OFF

Lower limit range: OFF, 50 to 99% SpO2 in 1% SpO2 steps

SpO2 on BSM-2304A

Measuring range: 1 to 100%

Pulse rate counting range: 0, 20 to 250 beats/min

SpO2 accuracy: Adult: ±2 digits (70% ≤ SpO2 ≤ 100%)

Neonate: ±3 digits (70% ≤ SpO2 < 100%)

SpO2 display:

Pulse rate display update cycle: Every 3 s or when alarm is generated

Sync tone modulation: Change in 20 steps at 81 to 100% SpO

Waveform sensitivity: ×1/8, ×1/4, ×1/2, ×1, ×2, ×4, ×8

Alarm:

Upper limit range: 51 to 100% SpO2 in 1% SpO2 steps, OFF

Lower limit range: OFF, 50 to 99% SpO2 in 1% SpO2 steps

Non Invasive Blood pressure, NIBP

Measuring method: Oscillometric

Measuring range: 0 to 300 mmHg Accuracy: ±3 mmHg (0 mmHg ≤ NIBP ≤ 200 mmHg)

±4 mmHg (200 mmHg ≤ NIBP ≤ 300 mmHg)

Cuff inflation time: Adult: 7 s

Neonate: 5 s

Initial cuff inflation pressure: Adult: 180 mmHg

Neonate: 100 mmHg

Safety:

Cuff inflation maximum pressure: Adult 300 mmHg

Neonate 150 mmHg

Safety cuff inflation limiter: Adult 330 mmHg

Neonate 165 mmHg

Cuff inflation time limiter: Adult ≤180 s

Neonates ≤90 s

Measurement mode: Manual

STAT (Continuous)

Periodic: 2, 2.5, 5, 10, 15, 30 min, 1, 2, 4, 8 hr interval, PWTT (PWTT is not

available on the BSM-2304A monitor)

NIBP data display update cycle: Updated every measurement

Measurement completion sound: Generated at every measurement completion when set on the SYSTEM SETUP

screen

1.8 Service Manual BSM-2300

Alarm:

Upper limit range: 15 to 260 mmHg in 5 mmHg steps, OFF

Lower limit range: OFF, 10 to 255 mmHg in 5 mmHg steps

Temperature

Measuring range: 0 to 45°C Measuring accuracy: ±0.1°C (25°C ≤ Temp ≤ 45°C)

±0.2°C ( 0°C ≤ Temp < 25°C)

Temperature drift: within ±0.005°C /°C

Temperature range:

Display range: 0°C to 45°C (32 to 113°F)

Display update cycle: Every 3 s

Alarm:

Upper limit range: 0.1 to 45°C (32 to 113°F) in 0.1°C (1°F) steps, OFF

Lower limit range: OFF, 0 to 44.9°C (31 to 112°F) in 0.1°C (1°F) steps

Multi-parameter Amplifier

Measuring parameters: IBP, respiration (thermistor method), and CO Input impedance: 1 MΩ ±10% Excitor output impedance: < 2 Ω

Excitor current limiter: < 100 mA

Maximum current from +5 V DC connector: < 100 mA

1. GENERAL

(mainstream)

Invasive Blood Pressure, IBP

Measuring range: −50 to 300 mmHg Measuring accuracy: ±1 mmHg ±1 digit (−50 mmHg ≤ IBP < 100 mmHg)

±1% ±1 digit (100 mmHg ≤ IBP ≤ 300 mmHg)

Auto zero balancing range: ±200 mmHg

Auto zero balancing accuracy: ±1 mmHg Transducer sensitivity: 50 µV/V/10 mmHg

Pulse rate counting range: 0, 12 to 300 beats/min

Pulse rate counting accuracy: ±2 beats/min

Noise: Within ±1 mmHg

Temperature zero drift: ±0.1 mmHg/°C

Frequency response: DC to 20 Hz ±3Hz

DC to 12 Hz ±3Hz

Display update cycle: Every 3 or when alarm is generated

BP sync sound: Provided, systolic value 20 to 120 mmHg, changes in 20 steps every 5 mmHg

Alarm:

Upper limit range: 2 to 300 mmHg in 2 mmHg steps, OFF

Lower limit range: OFF, 0 to 298 mmHg steps in 2 mmHg steps

Respiration (Thermistor method)

Respiration rate counting range: 0 to 150 breaths/min

Apnea, 5 to 40 s

Accuracy: ±2 breaths/min Noise: Within 20 Ω (Refer to input) Frequency response: 3.0 Hz (−3 dB) Time constant: ≥1.5 s

Service Manual BSM-2300 1.9

1. GENERAL

Waveform display

Display sensitivity: 10 mm/100 Ω ±20% (at ×1 sensitivity) Sensitivity control: ×1/4, ×1/2, ×1, ×2, ×4

Respiration rate display update cycle: Every 3 or when alarm is generated

Alarm:

Upper limit range: 2 to 150 breaths/min in 2 breaths/min steps, OFF

Lower limit range: OFF, 0 to 148 breaths/min in 2 breaths/min

Apnea time: OFF, 5 to 40 s in 5 s steps

Expired Carbon Dioxide Tension, CO

Measuring method: Mainstream, (semi-quantitative method: TG-900P)

Measuring range:

TG-900P: 0 to 76 mmHg

Warm-up time: 5 s (minimum)

Response time

TG-900P: 200 ms (typical) for steps from 10 to 90%

Detectable respiration rate

TG-900P: 3 to 60 breaths/min

Respiration rate counting accuracy: ±2 breaths/min

Measuring accuracy:

TG-900P: ±4 mmHg (0 ≤ CO2 ≤ 40 mmHg)

±10% reading (40 < CO2 ≤ 76 mmHg)

(When 1 atmospheric pressure, air inspiration, no condensation)

N2O anesthetic gas effect: Accuracy in using N2O anesthetic gas is not guaranteed

CO2 value display update cycle: Every 3 s or when alarm is generated

Alarm:

Upper limit range: 2 to 99 mmHg in 1 mmHg in 1 steps, OFF

Lower limit range: OFF, 1 to 98 mmHg in 1 steps

Apnea time: OFF, 5 to 40 s

Trendgraph

Trend parameters: Heart rate (or pulse rate), respiration rate, VPC rate, ST level, EVENT (arrhythmia),

apnea (time), apnea (frequency), SpO2, NIBP (systolic, diastolic and mean), IBP

(systolic, diastolic and mean), temperature and ETCO

Trend times: 1, 2, 4, 8, and 24 h

Data sampling time: 1 min for 1, 2, 4, 8 hours, 3 min for 24 hours

Vital Signs List

Parameters: Heart rate (or pulse rate), VPC rate, ST level, NIBP (systolic, diastolic and mean),

SpO2, IBP (systolic, diastolic and mean), respiration rate, temperature and ETCO

Number of files in list: Periodic vital signs list: 120

Entries in vital signs list at NIBP measurement: 120

List interval: Periodic vital signs list: 1, 5, 15, 30 or 60 minutes

Vital signs list at NIBP measurement: at NIBP measurement

Recorder Module (optional, WS-231P)

Recording method: Thermal array recording

Number of channels: 3 traces (maximum) Recording width: ≥46 mm

1.10 Service Manual BSM-2300

Paper speed: 25, 50 mm/s

Recording paper: FQW50-3-100

Resolution: Amplitude direction of waveforms: 8 dots/mm

Time direction of waveforms: 40 lines/mm

8 lines/mm (graphic recording)

Dimensions: 212 mm W × 90 mm H × 140 mm D

Weight: 1.5 kg

Interface (optional, QI-231P)

ECG analog output

Output voltage: within ±5 V

Sensitivity: 1 V/1 mV ±5% Frequency: low 0.6 Hz ±0.1 Hz (−3 dB)

high 23 Hz ±3 Hz (−3 dB)

Delay time: within 20 ms

Trigger output

Output format: open collector

External application signal: voltage +5 to +15 V

current 500 µA to 100 mA

QRS sync delay time: within 100 ms

1. GENERAL

Interface (optional, QI-236P)

ECG analog output

Output voltage: within ±5 V

Sensitivity: 1 V/1 mV ±5% Frequency: low 0.6 Hz ±0.1 Hz (−3 dB)

high 23 Hz ±3 Hz (−3 dB)

Delay time: within 20 ms

Trigger output

Output format: TTL compatible

QRS sync delay time: within 20 ms

External Output

ZB-900PK: Provided

External monitor: Provided

Power Requirement

Line voltage: BSM-2301A/2304A: 117 V ±10% AC

BSM-2301K/2303K: 100 to 240 V ±10% AC

Line frequency: 50 or 60 Hz ±2%

Battery pack (10HR-4/3FAUC-NK): DC 10.8 to 15.0 V ±5%

Power consumption: AC: BSM-2301/2304 70 VA maximum

BSM-2303 86 VA maximum

DC: 40 W maximum (internal battery operation)

Service Manual BSM-2300 1.11

1. GENERAL

Clock Accuracy

At operating temperature 25°C: about ±2 min 40 s/month maximum At storage temperature −20 to 60°C: about ±5 min/month maximum

Environment

Operating environment

Temperature: 10 to 40°C

Humidity: 30 to 90% RH (0 to 40°C, non-condensing)

Atmospheric pressure: 70 to 106 kPa

Storage environment

Temperature: −20 to +60°C

−15 to +55°C (Recording paper)

Humidity: 10 to 90% RH (0 to 40°C, non-condensing)

Atmospheric pressure: 70 to 106 kPa

Dimensions and Weight (approximate)

Dimensions: 253 mm W × 242 mm H ×145 mm D

Weight: 4.7 kg (excluding options)

Electromagnetic Compatibility

IEC60601-1-2 (1993) – Collateral Standard: Electromagnetic compatibility – Requirement and tests

Emissions: CISPR11 Group 1, Class B

Safety Standard

Safety standard: IEC 60601-1 (1988) Amendment 1 (1991), Amendment 2 (1995)

IEC 60601-1-1 Amendment 1 (1992)

IEC 60601-2-27 (1994) - Particular requirements for the safety of

electrocardiographic monitoring

IEC 60601-2-34 (1994) - Particular requirements for the safety of direct blood

pressure monitoring equipment

IEC 60601-2-30 (1995) - Particular requirements for the safety of automatic

cycling in in-direct blood pressure monitoring equipment

According to the type of protection against electrical shock:

CLASS I EQUIPMENT (AC Powered)

Internally Powered EQUIPMENT (BATTERY Powered)

According to the degree of protection against electrical shock

ECG, Respiration (impedance), Respiration (thermistor), IBP, Temperature, CO

Defibrillator-proof type CF applied part

SpO2, NIBP: Defibrillator-proof type BF applied part

For BSM-2301, depending on the serial number, the degree of protection against electrical shock for the specified

parameters may be as follows.

Temperature: CF applied part SpO2, Respiration (thermistor), CO2: BF applied part

According to the degree of protection against harmful ingress of water:

IPX0 (ordinary EQUIPMENT)

According to the degree of safety of application in the presence of FLAMMABLE ANAESTHETIC MIXTURE WITH AIR,

OR WITH OXYGEN OR NITROUS OXIDE:

Equipment not suitable for use in the presence of FLAMMABLE ANAESTHETIC

MIXTURE WITH AIR, OR WITH OXYGEN OR NITROUS OXIDE

According to the mode of operation: CONTINUOUS OPERATION

1.12 Service Manual BSM-2300

Composition

1. GENERAL

BSM-2301A BSM-2301K BSM-2303K BSM-2304A

CD-230P CD-232P

SC-040R SC-046R

Chassis for BSM-2301A/K and BSM-2303K Chassis for BSM-2304A

Power Supply Block for BSM-2301A/K and BSM-2303K Power Supply Block for BSM-2304A

(Power supply unit* included)

UR-3610

UR-3612 UR-3712

UR-3611

UR-3643*

UR-3644*

UR-3681*1*

MAIN Board

Analog Board for BSM-2301A/K and BSM-2303K Analog Board for BSM-2304A

Alarm Indicator Board

NIBP & Hall Sensor Boards

Operation & Power SW Boards

IBP Board

Recorder Module (option)

WS-231P

*1Refer to Section 8 “Replaceable Parts List”.

*2BSM-2301A/K has no UR-3681 IBP board

UR-3615

UR-3616*

RG-922P

REC MAIN Board

REC Key & Power Boards

Recorder Unit

* Refer to “Optional Recorder Module WS-231P” in Section 8.

Interface (option)

QI-231P

UR-3691

UR-3731QI-236P

IO ANALOG OUT Board

IO CT OUT Board

Service Manual BSM-2300 1.13

1. GENERAL

Panel Descriptions

Front Panel

SILENCE ALARMS

NIBP

INTERVAL

START/STOP

HOME

Without optional WS-231P recorder module

SILENCE ALARMS

NIBP

INTERVAL

START/STOP

HOME

With optional WS-231P recorder module

1.14 Service Manual BSM-2300

1. GENERAL

No. Name Description

1 Alarm indicator

2 Handle For carrying the monitor.

3 SILENCE ALARMS key Silences the alarm sound.

4 NIBP INTERVAL key Selects NIBP measurement mode. Pressing this key changes the mode.

5 NIBP START/STOP key

6 MENU key Displays the MENU window.

7 HOME key Closes any opened window and displays the monitoring screen.

Red or orange lamp blinks according to the alarm settings. Green lamp blinks in synchronization with the patient’s QRS.

Starts NIBP measurement in selected mode. Pressing the key during measurement stops measurement.

8 Power switch Press and hold for more than one second to turn the monitor power on or off.

9 Power lamp Lights when the monitor power is turned on.

10 AC power lamp

11 Battery power lamp Lights when operating on the battery power.

12 Battery charging lamp Lights or slowly blinks when charging.

13 Touch screen

14 Record key Press to start or stop recording.

15 Out of paper lamp Blinks when out of paper. Lights when paper magazine is open.

Lights when the power cord is connected between the AC SOURCE socket and AC outlet.

Displays monitoring data. Touching a key or data on the screen changes displaying screen and settings.

Service Manual BSM-2300 1.15

1. GENERAL

Left Side Panel

BSM-2301A/K and BSM-2303K

TEMP socket

Connects to the temperature probe cord.

Refer to Warning and Caution in the "General Safety Information" section.

Multi-parameter socket

Connects to the connection cord of the parameter to be monitored (IBP (PRESS for BSM-2301, PRESS 2 for BSM-2303), CO

or respiration by

thermistor method). The type of parameter is automatically recognized.

PRESS 1 socket

Connects to the IBP connection cord. Not available on BSM-2301.

Battery box

For the optional battery pack.

TEMP socket

Connects to the temperature probe cord.

SpO

socket

Connects to the SpO2 connection cord.

ECG/RESP socket

Connects to the ECG connection cord.

NIBP socket

Connects to the air hose.

Refer to Warning and Caution in the "General Safety Information" section.

Multi-parameter socket

Connects to the connection cord of the parameter to be monitored (IBP (PRESS for BSM-2301, PRESS 2 for BSM-2303), CO by thermistor method). The type of parameter is automatically recognized.

Without optional WS-231P recorder module

or respiration

SpO

socket

PRESS 1 socket

Connects to the IBP connection cord. Not available on BSM-2301.

Connects to the SpO

connection cord.

ECG/RESP socket

Connects to the ECG connection cord.

NIBP socket

Connects to the air hose.

Battery box

For the optional battery pack.

With optional WS-231P recorder module

1.16 Service Manual BSM-2300

BSM-2304A

TEMP socket

Connects to the temperature probe cord.

PRESS 1 socket

Connects to the IBP connection cord.

NELLCOR

OxiMax

1. GENERAL

Refer to Warning and Caution in the "General Safety Information" section.

Multi-parameter socket

Connects to the connection cord of the parameter to be monitored (IBP (PRESS 2), CO

or respiration

by thermistor method). The type of parameter is automatically recognized.

SpO

socket

Connects to the SpO2 connection cord.

ECG/RESP socket

Connects to the ECG connection cord.

Battery box

For the optional battery pack.

TEMP socket

Connects to the temperature probe cord.

PRESS 1 socket

Connects to the IBP connection cord.

NELLCOR

OxiMax

NIBP socket

Connects to the air hose.

Without optional WS-231P recorder module

Refer to Warning and Caution in the "General Safety Information" section.

Multi-parameter socket

Connects to the connection cord of the parameter to be monitored (IBP (PRESS 2), CO

or respiration

by thermistor method). The type of parameter is automatically recognized.

SpO

socket

Connects to the SpO

connection cord.

ECG/RESP socket

Connects to the ECG connection cord.

NIBP socket

Connects to the air hose.

Battery box

With optional WS-231P recorder module

For the optional battery pack.

Service Manual BSM-2300 1.17

1. GENERAL

Right Side Panel

Handle

PC card eject button

PC card slot

Equipotential grounding terminal For an equipotential grounding lead.

Fuse holder

AC SOURCE power cord socket For the AC power cord.

AUX socket For connecting a display monitor or QI-231P/236P interface or AG-400R.

ZB socket For the ZB-900P transmitter.

Without optional WS-231P recorder module

Handle

PC card eject button

PC card slot

Equipotential grounding terminal For an equipotential grounding lead.

Fuse holder

AC SOURCE power cord socket For the AC power cord.

AUX socket For connecting a display monitor or QI-231P/236P interface or AG-400R.

Recorder door release lever Pull up the lever to open the recorder door.

1.18 Service Manual BSM-2300

ZB socket For the ZB-900P transmitter.

WS-231P recorder module (option)

Paper window For checking the amount of recording paper.

With optional WS-231P recorder module

Storage and Transport

Follow these procedures when storing or transporting the instrument.

1. GENERAL

Storage

Transport

Before storing the instrument for a long time, perform the following steps:

1. Disconnect the power cord from the instrument.

2. Cover the instrument with a dust cover.

3. If possible, store the instrument in its original shipping container.

4. Make sure the storage place meets the following storage conditions for the

duration of the storage: Storage temperature −20 to 60°C (−4 to 140°F)

Storage humidity 10 to 90% RH, non-condensing

To transport the instrument, perform the following steps:

1. Disconnect the power cord from the instrument.

2. Cover the instrument with a dust cover.

3. If possible, transport the instrument in its original shipping container.

Service Manual BSM-2300 1.19

1. GENERAL

Hard Keys and Soft Keys

Hard Keys

Soft Keys

The instrument has five hard keys: SILENCE ALARMS, NIBP interval, NIBP

START/STOP, MENU and HOME.

These keys always have the same functions, regardless of the screen display.

In this manual, hard keys are indicated by CAPITAL LETTERS.

When the MENU key is pressed or the screen is touched, the screen displays

several keys which have different functions depending on the screen display. For

example, when the HR numeric display is touched, the ECG setting screen appears

and several keys such as VITAL ALARM, ARRHYTH ALARM, OTHER

SETTING, etc are displayed.

In this manual, soft keys are indicated by quotation marks (for example, the

“PATIENT INFO” key).

1.20 Service Manual BSM-2300

1. GENERAL

Upgrading the System Software and Changing Language on the

Screen

CAUTION

Upgrading the system software and changing the language on screen

erases all system and individual bed settings. Write down these

settings so they can be re-entered after the software upgrade.

The instrument uses a program card for upgrading its system software and

changing the screen language. When the instrument detects that a program card is

inserted into its PCMCIA card slot during the booting stage after it is turned on, it

checks the program card for a system program or language. If the program card

contains a newer version of the system program or language, the instrument

automatically replaces its current system program or language information with the

new one. If the program card contains a system program whose version number is

the same or older than the current one in the instrument, you have the option to

replace or keep the current system program. If the program card does not contain a

system program, the instrument continues the boot-up process.

In the system software upgrading or language changing process, the instrument

first deletes the old system software or language stored in its system ROM. Then it

checks whether the data in the system ROM is completely deleted. When the data is

completely deleted, it copies the new version of the system program or language

information from the program card to the system ROM and then checks the copy

process. After the data is successfully copied, the self-check program starts to

check the instrument.

Procedure

1. Write down the System Setup settings and other monitoring settings of the

instrument.

2. Insert the program card into the PCMCIA card slot on the right side panel of

the instrument.

3. Turn on the instrument. The instrument performs the upgrading process and

self-check programs. The DIAGNOSTIC CHECK screen appears.

4. Touch and hold the “SYSTEM INITIALIZE” key for 2 seconds to initialize the

instrument until the “PUSH 3 SECONDS” message disappears from the screen.

When initializing is finished, the DIAGNOSTIC CHECK screen appears.

5. Confirm that the new system software version number appears.

Service Manual BSM-2300 1.21

1. GENERAL

Block Diagram

BSM-2300

Analog Board

Reset

DPU

Reset

TxD

RxD

Interface

ZB-900P

Hall Sensor

Board

ECG

RESP

ADC

ERC

Digital

DC to DC

Converter

BUS

SpO2

Opt-coupler

MP-506**

ADC

APU

Digital

Opt-coupler

Multi

ADC

DC to DC

Converter

BUS

Te mp

IBP

Sensor

* BSM-2301 has no IBP board

IBP Board*

NIBP

Circuit

Measure

unit replaces the

block surrounded by a dotted

** In BSM-2304A, the MP-506

Nellcor SpO

ADC

border.

Valve

Pump

NIBP

Safety

Sensor

Circuit

Speaker

NIBP Board

MAIN Board

battery

Lithium

Super

Capacitor

Boot ROM

64 k x 16 EPROM

Host CPU

Clock

Real-time

Backup RAM

32 k x 8 EEPROM

System RAM

512 k x 16 SRAM

System ROM

1 M x 16 Flash

Main System Bus = Address Bus, Data Bus, Control Signal Bus

20 MHz

MC68SEC000

Bus

buffer

Chip select lines

/Reset

Reset

+3.3 V

Interrupt

/Reset

WDT

/Reset

snd (7:0)

/Reset

/DTACK

/Reset

Interface

PCMCIA Card

+5 V

Card

FM Sound

Generator

Slot

BUS

ACORN

Main ASIC

RxD

(CPU Peripheral)

WDT

/Reset

Reset

+3.3 V

TxD

from

Analog RGB Interface

BUS

from

Power Supply

Microcontroller

Character RAM

Graphic RAM-2

Graphic ASIC

+3.3 V

512 k x 8 SRAM

2 M x 32 SDRAM

IBIS

R (5:0), CLK,

(LCD Control)

+5 V

3.3 V_PS

DC to DC

Converter

BUS

AC/Battery

BUS

LED

Driver

Alarm Indicator

Interface

+5 V

G (5:0), H_Sync

B (5:0), V_Sync

Reset

PWR Fail

Reset

Power Supply

+12V_BT

Touch Screen

Microcontroller

B G

Analog RGB

8 bit

Microcontroller

Buzzer

Battery

Interface

BUS

Interface

Driver

BUS

Alarm

Indicator Board

Operation

AUX Socket

LED Driver

Buzzer

Board

(Front Panel)

Inverter

TFT LCD

(Front Panel)

Power SW Board

Keypad

Touch

800 x 600

screen

Tw o

Recorder

Sockets

AUX Socket

Unit

Power Supply

+15 V_PS

Battery Pack

Option

(Ni-MH)

1.22 Service Manual BSM-2300

WS-231P Recorder Module

(Host unit)

BSM-2300

REC Key Board

(Record key switch and

out of paper lamp included)

1. GENERAL

CPU

20 MHz

MC68SEC000

RACOON

Recorder ASIC

Interface

Recorder

+5V

Power

Recorder

+24V

REC Power Board

512 k x 16

Flash ROM

Bus (Address, Data, Control signals)

SRAM

256 k x 16

REC MAIN Board

Service Manual BSM-2300 1.23

Unit

Recorder

RG-922P

1. GENERAL

Photo

coupler

QI-231P Interface

ECG or

trigger output

Excessive

voltage

protection

circuit

Analog switch

TRIG/ECG jack

ECG and

trigger output

LED indicators

Filter

Floating area

12 bit

Micro-

D to A

converter

controller

Bit setting for ECG outputs

4-bit switch

4 MHz

oscillator

To the AUX socket on the BSM-2300 series

0000: ECGHUM1

0001: ECG1

0010: ECGHUM2

0011: ECG2

Trigger

ON: 1

OFF: 0

output

circuit

supply voltage

5 V

Transformer

128 kHz

oscillator

Non-floating area

RGB

20-pin AUX socket for

serial data communication

15-pin RGB output socket

+5 V supply voltage

Serial data communication

ECG or trigger digital signal

1.24 Service Manual BSM-2300

QI-236P Interface

AmpFilter

ECG

Comparator

T-wave

discriminator

1. GENERAL

Full-wave

rectifier

Filter

Sensitivity

selector

12-bit D to A

converter

Micro-

controller

PIC16C63A

(PIC1)

4 MHz

oscillator

Micro-

controller

PIC16C63A

(PIC2)

4 MHz

oscillator

5 VF supply voltage

Transformer

128 kHZ

oscillator

RGB

ECG

RGB

Dedicated serial data

+5 V

communication between

BSM-2300 and QI-236P

Service Manual BSM-2300 1.25

Section 2 Troubleshooting

General .............................................................................................................................. 2.1

Power-Related Problems ................................................................................................... 2.2

Display Problems .............................................................................................................. 2.3

Sound Problems ................................................................................................................ 2.4

Key Operation Problems ................................................................................................... 2.4

ECG and Respiration by Impedance Method Problems ................................................... 2.5

SpO2 Problems ................................................................................................................. 2.6

Non-invasive Blood Pressure Problems ........................................................................... 2.7

Temperature Problems ...................................................................................................... 2.8

Other Vital Sign Input Problems ........................................................................................ 2.9

Option Problems ...............................................................................................................2.10

Recording Problems .........................................................................................................2.11

QI-231P Interface Problems ............................................................................................. 2.13

QI-236P Interface Problems ............................................................................................. 2.13

Service Manual BSM-2300 2C.1

General

2. TROUBLESHOOTING

Use the troubleshooting tables to locate, identify, and solve a problem in the

instrument. The problems are divided into general problem areas. Each category

has its own troubleshooting table for fast and easy troubleshooting.

• Power-related Problems

• Display Problems

• Sound Problems

• Key Operation Problems

• ECG and Respiration by Impedance Method Problems

• SpO

Problems

• NIBP Problems

• Temperature Problems

• Other Vital Sign Input Problems

• Option Problems

• Recording Problems

If these sections do not solve the problem, contact your Nihon Kohden

representative.

NOTE

Before contacting your Nihon Kohden representative for technical

support, please provide additional detailed information on the problem.

This will allow your Nihon Kohden representative to provide you with

the best support.

How to use the troubleshooting table

1. Determine which troubleshooting table to use.

2. In the “Problem” column, find the trouble item that matches the problem.

3. Do the action recommended in the “Action” column.

4. If the problem is not solved, do the action for the next possible cause or

criteria.

5. If none of the actions solve the problem, contact your Nihon Kohden

representative.

Service Manual BSM-2300 2.1

2. TROUBLESHOOTING

Power-Related Problems

Problem Possible Cause/Criteria Action

The instrument is not turned on and AC power lamp does not light in AC power operation.

The instrument is not turned on but AC power lamp lights in AC power operation. The instrument is not turned on and the battery power lamp does not light in DC power operation.

DC power operation time is shorter than expected.

Power switch is not operational.

No AC power input. Check the AC power input.

One or both AC inlet fuses is blown. Remove the cause of the blown fuse, then

Faulty connection between CN0401 on the MAIN board and power supply unit.

Faulty power supply unit.

Faulty connection between CN0202 on the MAIN board and CN101 on the Operation board or between CN102 on the Operation board and CN103 on the Power SW board.

Faulty MAIN board. Replace the MAIN board with a new one.

Faulty Power SW board.

Faulty MAIN board. Replace the MAIN board with a new one.

The battery is discharged. Charge the battery before use.

The battery is damaged or near the end of its

life (about 1 year). Faulty connection between CN0202 on the MAIN board and CN101 on the Operation board or between CN102 on the Operation board and CN103 on the Power SW board. Faulty MAIN board. Replace the MAIN board with a new one.

The battery is near the end of its life (about 1 year).

The battery has had “memory effect” in which its charge capacity is decreased by frequent incomplete discharging and charging.

Faulty battery charger circuit. Replace the MAIN board with a new one.

Faulty Power SW board. Replace the Power SW board.

Faulty MAIN board. Replace the MAIN board.

replace the fuse with a new one. Check the connection.

Replace the power supply unit with a new one. Check the connection.

Replace the Power SW board with a new one. Replace the Power SW board with a new one.

Replace the battery with a new one.

Check the connection.

Replace the battery with a new one.

To clear this “memory effect”, fully discharge the battery and then fully charge it a few times. Replace the battery with a new one.

2.2 Service Manual BSM-2300

2. TROUBLESHOOTING

Display Problems

Problem Possible Cause/Criteria Action

No display and the backlight does not light.

No display, but the backlight lights.

The characters or waveforms are distorted. Faulty MAIN board. Replace the MAIN board.

The display is dim and the brightness control does not make it brighter.

The Diagnostic Check screen appears in the monitor mode and “OK” is displayed at the POWER ON CHECK RESULT. The Diagnostic Check screen appears in the monitor mode and an error message is displayed at the POWER ON CHECK RESULT. Refer to “Power On Self Check” in Section 3. The screen with a “Check Program Running” message does not change to the next screen after the power is turned on.

System error information appears at the upper left corner on the screen in the monitor mode and the instrument restarts. More than 6 pixels on the screen do not light or have abnormal color. Note that up to 6 pixels with such a problem is considered normal. No waveform is displayed but the connection cord for each vital sign is recognized. No waveform is displayed and the connection cord for each vital sign is not recognized.

Faulty connection between CN0802 on the MAIN board and inverter. Faulty connection between inverter and LCD unit.

Faulty inverter board. Replace the inverter board.

Faulty backlight lamps. Replace the backlight lamps.

Faulty connection between CN1001 on the MAIN board and LCD unit.

Faulty LCD unit. Replace the LCD unit.

Faulty MAIN board. Replace the MAIN board.

Battery operation. Set the POWER SAVE MODE

Dirt on the touch screen (inside or outside). The backlight lamps are near the end of its useful life (50,000 hours of operation). Faulty connection between CN0802 on the MAIN board and inverter board.

Faulty Operation board. Replace the Operation board.

Faulty MAIN board. Replace the MAIN board.

Faulty Analog board. Replace the Analog board.

Interference such as electrostatic discharge temporarily breaks the program data.

Faulty MAIN board. Replace the MAIN board.

Faulty Analog board. Replace the Analog board.

Faulty MAIN board. Replace the MAIN board.

Faulty LCD unit. Replace the LCD unit.

Faulty MAIN board. Replace the MAIN board.

Refer to each vital sign troubleshooting section.

Check the connections.

Check the connection.

to OFF on the SYSTEM SETUP screen. Clean the surface of touch screen. Replace the backlight lamps.

Check the connection.

Perform the system initialization.

Refer to each vital sign troubleshooting section.

Service Manual BSM-2300 2.3

2. TROUBLESHOOTING

Sound Problems

Problem Possible Cause/Criteria Action

No sound.

No sound, except for a hissing sound.

The sound is muffled or distorted.

Faulty connection between CN0107 on the NIBP board and the speaker.

Faulty speaker. Replace the speaker.

Faulty audio circuit on the MAIN board. Replace the MAIN board.

Faulty speaker. Replace the speaker.

Something foreign blocks the speaker vents or touches the speaker.

The speaker is wrongly attached. Attach the speaker correctly.

Check the connection.

Remove the foreign matter.

Key Operation Problems

Problem Possible Cause/Criteria Action

No key on the front panel works.

A specified key on the operation panel does not work.

The workable key area does not match the key display on the screen.

Touch screen does not work.

Faulty connection between CN101 on the Operation board and CN0202 on the MAIN board.

Faulty MAIN board. Replace the MAIN board.

Faulty Operation board. Replace the Operation board. Faulty connection between CN101 on the

Operation board and CN0202 on the MAIN board.

Faulty Operation board. Replace the Operation board.

Faulty MAIN board. Replace the MAIN board.

Incorrect calibration of the touch screen. Calibrate the touch screen positioning.

Faulty MAIN board. Check the MAIN board.

Faulty touch screen. Check the touch screen.

The key function on the entire screen does not work.

The key function on a partial screen such as upper half screen does not work

Check the connection.

Replace the connection cable.

Faulty connection between the touch screen and CN0701 on the Connection board.

Faulty MAIN board.

Faulty touch screen.

Faulty touch screen. Replace the touch screen.

Check the connection.

Replace the MAIN board.

Replace the touch screen.

2.4 Service Manual BSM-2300

2. TROUBLESHOOTING

ECG and Respiration by Impedance Method Problems

Problem Possible Cause/Criteria Action

ATTACH ELECTRODES message is displayed even after each electrode contact part of the electrode lead is short-circuited.

The setting, Number of electrodes, is set to a higher number than the actual number of the electrodes. The electrode lead, ECG connection cord or patient cable is faulty.

Faulty Analog board.

The contact between the patient’s skin and electrode is poor or gel of the electrode is dry. An electric blanket is used on or near the patient.

Set the number of electrodes correctly.

Replace the accessory with a new one.

Replace the Analog board with a new one. Replace all the electrodes with new ones.

Cover the blanket with a shielding sheet.

Hum (line frequency noise) is on the ECG waveform.

The time constant setting cannot be changed.

Pacing spike is not detected.

The ECG waveform is displayed with a different ECG sensitivity from the sensitivity setting. Monitoring lead setting cannot be changed.

Respiration waveform is not displayed.

Respiration rate is wrong.

ECG waveform and respiration waveform are mixed. Respiration waveform is saturated and does not return to the baseline position but the sensitivity is not too high.

The instrument uses the AC outlet connected to a equipment which has noise source. The ground wire of the power cord has a poor contact between the instrument and ground facility or the ground facility is poor.

FILTERS on the ECG window is set to OFF. Set the FILTERS to on.

Faulty Analog board. Replace the Analog board.

Faulty connection between the MAIN board and Analog board.

Faulty Analog board Replace the Analog board.

PACING DETECTION on the ECG window is set to OFF.

Faulty Analog board. Replace the Analog board.

Faulty connection between the MAIN board and Analog board.

Faulty Analog board. Replace the Analog board.

Faulty connection between the MAIN board and Analog board.

Faulty Analog board. Replace the Analog board.

Electrode, electrode lead, ECG connection cord or patient cable is faulty if the ECG waveform on the screen has something wrong. When “RESP OFF” message is displayed on the screen, IMP RESP MEASURE on the RESP window is set to OFF.

Faulty Analog board. Replace the Analog board.

The respiration waveform amplitude is too small to count the respiration rate.

Faulty Analog board. Replace the Analog board.

Use a different AC outlet.

Check which part is not grounded and remove the cause.

Check the connection.

Set the DETECTION to ON.

Check the connection.

Replace the accessory with a new one.

Set the IMP RESP MEASURE to ON.

Change the sensitivity so that the amplitude is larger than 10 mm on the screen.

Service Manual BSM-2300 2.5

2. TROUBLESHOOTING

SpO2 Problems

Problem Possible Cause/Criteria Action

CHANGE PROBE message is displayed.

There is no change on the screen when you connect the SpO to the SpO instrument. DETECTING PULSE message is displayed.

2 connection cord

2 socket on the

The probe is expired, damaged or defective.

Faulty SpO

Temperature and IBP can be measured.

Temperature and IBP cannot be measured.

The probe attachment site is not changed or the probe is not replaced with a new one.

2 connection cord.

Faulty Analog board

Faulty Analog board or MAIN board.

Replace the probe with a new one. Replace the connection cord with a new one. Replace the Analog board with a new one.

Replace the faulty board with a new one.

Change the probe site or replace the probe with a new one.

CANNOT DETECT message is displayed.

The probe attachment site is changed or replaced with a new one. The probe attachment site is not changed or the probe is not replaced with a new one. The probe attachment site is changed or replaced with a new one.

Faulty Analog board. Replace the Analog board with a

new one.

Change the probe site or replace the probe with a new one.

new one.

2.6 Service Manual BSM-2300

Non-invasive Blood Pressure Problems

Problem Possible Cause/Criteria Action

NIBP MODULE ERROR message is displayed. NIBP SAFETY CIRCUIT RUNNING message is displayed.

AIR LEAK message is displayed.

There is no change on the screen when you connect the air hose to the NIBP socket on the instrument.

NIBP measurement data on the screen is wrong.

The cuff does not inflate when you press the NIBP START/STOP key.

Faulty NIBP board. Replace the NIBP board with a new one.

Air hose is bent. Check the air hose. One of the internal air tubes between the

NIBP board and NIBP socket is pinched. Faulty NIBP board. Replace the NIBP board with a new one.

Cuff or air hose has an air leak.

One of the internal air tubes between the NIBP board and NIBP socket is loose or disconnected if the cuff is not inflated when the NIBP pump sounds like it’s moving.

Faulty NIBP board. Replace the NIBP board with a new one.

The air hose connector is faulty. Replace the air hose with a new one. The connection cable between the Hall

Sensor board and NIBP board is disconnected or faulty. The connection cable between the NIBP board and MAIN board is disconnected or faulty. Faulty Hall Sensor board, NIBP board or MAIN board. A wrong cuff size is used or the condition of the cuff wrapped around the patient’s arm is not correct.

Faulty NIBP board. Replace the NIBP board with a new one.

If a message is displayed on the screen, follow the message to solve the problem.

The Operation board or MAIN board is faulty or the cable between the Operation and MAIN boards or between the MAIN and NIBP boards is disconnected or faulty.

Faulty NIBP board Replace the NIBP board with a new one.

2. TROUBLESHOOTING

Check the internal air tube connection.

Replace the cuff or air hose with a new one.

Check the internal air tube connection. Replace the faulty component with a new one if damaged.

Tightly connect the cable between the boards. Replace the cable with a new one if faulty. Tightly connect the cable between the boards. Replace the cable with a new one if faulty.

Replace the faulty board with a new one.

Check the cuff size and the wrapping condition. Replace the cuff with a new one I f necessary.

Refer to ERROR MESSAGES AND TROUBLESHOOTING section in the operator’s manual.

Replace the faulty board or cable with a new one. Tightly connect the cable between the two boards.

Service Manual BSM-2300 2.7

2. TROUBLESHOOTING

Temperature Problems

Problem Possible Cause/Criteria Action

The temperature value is not displayed.

The temperature value is wrong.

Faulty temperature probe. Replace the probe with a new one.

Faulty Analog board. Replace the Analog board with a new one.

Faulty temperature probe. Replace the probe with a new one.

Faulty Analog board. Replace the Analog board with a new one.

2.8 Service Manual BSM-2300

Option Problems

Problem Possible Cause/Criteria Action

The instrument does not transmit the patient’s data at all with the optional transmitter ZB-900P.

The instrument has no communication with the other bedside monitors and central monitors.

The transmitter cable is disconnected from the instrument. ZB-800P transmitter is erroneously connected to the instrument. The channel for the transmitter is not set at the central monitor or telemetry system.

Faulty transmitter, Analog board or MAIN board.

The optional QI-101P network card is not installed into the instrument. The network communicating symbol does not appear on the screen.

The network card is poorly inserted into the slot of the instrument. The network cable such as 10Base-T cable is poorly connected between the network card and hub. The hub connected to the instrument is not turned on or is faulty. The instrument is connected to the hub with 10Base-T cross wiring cable. The instrument is directly connected to the central monitor with 10Base-T straight wiring cable.

The network cable is faulty. Replace the network cable with a new one. The network card or MAIN

board is faulty.

Tightly connect the transmitter to the instrument.

Use ZB-900P transmitter.

Set the channel correctly at the central monitor or telemetry system. Replace the faulty transmitter or board with a new one. Insert the network card into the slot of the instrument completely.

Tightly insert the network card into the slot.

Tightly connect the network cable between the network card and hub.

Turn on the hub. Replace the hub with a new one if the problem still exists after the power is turned on.

Use the correct wiring 10Base-T cable.

Replace the faulty network card or MAIN board with a new one.

2.10 Service Manual BSM-2300

Recording Problems

Problem Possible Cause/Criteria Action

Recording paper does not feed properly.

For page-dependent recording such as trendgraph and vital sign list, the recording does not start at the top of the page The recorded data such as waveform and grid has a faint part on the paper.

There is missing dots on the recorded data. Straight line is recorded at the same position on the paper. There is different contrast between the upper half and lower half of the paper.

Recording mark does not appear on the screen when the record key is pressed.

Paper magazine open mark appears on the screen.

Out of paper mark appears on the screen.

Recording can be performed when the paper is manually pulled out after the record key is pressed.

Wrong position of the recording paper in the magazine.

Paper other than Nihon Kohden is used. Use the Nihon Kohden paper.

Detector for the black square on the paper is dirty. Clean the detector.

Work-up is adhered to the thermal array head. Clean the head.

Paper other than Nihon Kohden is used. Use the Nihon Kohden paper.

Platen roller has a damage or is deformed. Replace the roller. The supply voltage for thermal array head (+24 V DC)

becomes a lower voltage. Faulty thermal array head if the dots are missed at the same position on the paper after the head is cleaned.

Faulty thermal array head. Replace the head.

The thermal array head is incompletely attached to the recorder unit.

2. TROUBLESHOOTING

Faulty connection between CN104 on the REC Power board and REC Key board or between the REC Power and REC MAIN boards.

Faulty REC Key board. Replace the REC Key board.

Faulty REC MAIN board. Replace the REC MAIN board. Faulty connection between the

monitor and recorder module. Faulty connection between the REC Power board and recorder unit.

Faulty magazine position sensing micro switch of the recorder unit.

Faulty REC Power board. Replace the REC Power board.

Faulty REC MAIN board. Replace the REC MAIN board. Faulty connection between the

REC Power board and recorder unit. Faulty paper detector (LED and phototransistor assy) of the reorder unit.

Faulty REC Power board. Replace the REC Power board.

Faulty REC MAIN board. Replace the REC MAIN board. Faulty connection between the

REC Power board and recorder unit.

Faulty paper drive motor of the recorder unit.

Faulty REC Power board. Replace the REC Power board.

Faulty REC MAIN board. Replace the REC MAIN board.

Check the connection and replace the connection cable with a new one if necessary.

Check the connection.

Check the connection and replace the connection cable with a new one if necessary. Replace the micro switch. Refer to Section 8 “Replaceable Parts List”.

Check the connection and replace the connection cable with a new one if necessary. Replace the paper detector. Refer to Section 8 “Replaceable Parts List”.

Check the connection and replace the connection cable with a new one if necessary. Replace the motor. Refer to Section 8 “Replaceable Parts List”.

Load the paper into the magazine correctly.

Replace the REC Power board.

Replace the head.

Attach the head correctly.

Service Manual BSM-2300 2.11

2. TROUBLESHOOTING

Problem Possible Cause/Criteria Action

The paper speed is unstable and waveform is compressed or extended on time scale.

Abnormally loud rotating sound of the paper drive motor No recording on the paper

Dirty gear or platen roller. Clean the gear and platen roller.

Faulty gear or platen roller. Replace the faulty one.

Unstable turn of the paper drive motor

Faulty gear or platen roller Replace the faulty one.

The heat-sensitive side of the paper is not faced to the thermal array head.

Paper other than Nihon Kohden is used. Use the Nihon Kohden paper.

Faulty connection between the REC Power board and recorder unit.

The supply voltage for thermal array head (+24 V DC) becomes a lower voltage.

Faulty thermal array head. Replace the head.

Faulty REC Power board. Replace the REC Power board. Faulty motor or recorder

unit.

Replace the motor or recorder unit.

Load the paper into the magazine correctly.

Check the connection and replace the connection cable with a new one if necessary.

Replace the REC Power board.

2.12 Service Manual BSM-2300

QI-231P Interface Problems

Problem Possible Cause/Criteria Action

QRS synchronous signal HT is not output but the ECG lamp is lit.

Alarm trigger signal is not output but the ECG lamp is lit.

ECG analog signal is not output but the TRIG lamp is lit.

The ECG lamp and TRIG lamp are not lit

An external display connected to the QI-231P interface does not display any screen.

When the QI-231P is attached to the bedside monitor, its operation is wrong.

The output setting is wrong.

The cable of the QI-231P interface has a poor contact to the bedside monitor.

The QI-231P has a malfunction.

The cable of the QI-231P interface has a poor contact between the bedside monitor and external display. The display requires the different specification from the RGB signals of the bedside monitor.

The QI-231P has a malfunction.

2. TROUBLESHOOTING

Select the QRS SYNC SIGNAL at the EXTERNAL OUTPUT of the OTHER SETUP items in the SYSTEM SETUP settings. Select the ALARM CRISIS or ALARM CRISIS & WARNING at the EXTERNAL OUTPUT of the OTHER SETUP items in the SYSTEM SETUP settings. Select the ECG ANALOG OUT at the EXTERNAL OUTPUT of the OTHER SETUP items in the SYSTEM SETUP settings. Check the connection between the bedside monitor and interface. Replace the IO ANALOG OUT board with a new one. Check the connection from the bedside monitor to the external display through the interface. Select an external display which matches the RGB signal specification of the bedside monitor. Replace the IO ANALOG OUT board with a new one.

Replace the IO ANALOG OUT board with a new one.

QI-236P Interface Problems

Problem Possible Cause/Criteria Action

QRS synchronous signal HT is not output.

ECG analog signal is not output. An external display connected to the bedside monitor through this interface does not display any screen.

When this interface is attached to the bedside monitor, the bedside monitor’s operation becomes wrong.

No QRS wave is detected at this interface. The connection between the bedside monitor and interface is poor. The connection between the bedside monitor and interface is poor. This interface has a poor contact between the bedside monitor and external display. The RGB signal requirement of the external display does not match the RGB signal specification of the bedside monitor.

This interface has a malfunction.

Adjust the ECG sensitivity at the bedside monitor. Firmly connect the cable of this interface to the AUX socket of the bedside monitor. Firmly connect the cable of this interface to the AUX socket of the bedside monitor. Check the connection from the bedside monitor to the external display through this interface.

Select an external display which matches the RGB signal specification of the bedside monitor.

Replace the IO CT OUT board with a new one.

Service Manual BSM-2300 2.13

Section 3 Diagnostic Check

Introduction ......................................................................................................................... 3.1

Power On Self Check .......................................................................................................... 3.2

Calling Up the DIAGNOSTIC CHECK Screen ...................................................................... 3.4

Calling Up the Error History .................................................................................................3.5

Error Codes ...............................................................................................................3.5

System Errors ........................................................................................................... 3.6

Initializing the System .........................................................................................................3.7

Performing Manual Check and Other Checks ......................................................................3.8

Calling Up the MANUAL CHECK MENU Screen ........................................................ 3.9

CPU Check Menu Items.......................................................................................... 3.10

ROM Check .................................................................................................. 3.10

RAM Check ..................................................................................................3.11

Hard Key Check ............................................................................................ 3.12

Touch Key Check .......................................................................................... 3.13

Sound Check ................................................................................................ 3.14

ALARM INDICATOR Check ........................................................................... 3.15

OTHER Check .............................................................................................. 3.16

MEMORY CARD Check ................................................................................3.17

Backlight Check ............................................................................................ 3.18

CRTC Check Menu Items .......................................................................................3.19

GRAPHIC MEMORY Check and CHARACTER MEMORY Check ................ 3.19

GRAPHIC DRAW Check ............................................................................... 3.20

CHARACTER DRAW Check.......................................................................... 3.22

IMAGE DRAW Check ................................................................................... 3.24

DPU Check Menu Items.......................................................................................... 3.25

D/A ADJUST................................................................................................. 3.25

AD TEST .......................................................................................................3.26

ZB I/F Check ................................................................................................ 3.27

NIBP Check ..................................................................................................3.28

DPU ROM Check ..........................................................................................3.38

DPU RAM Check .......................................................................................... 3.39

Power FREQ ................................................................................................. 3.40

APU Check Menu Items.......................................................................................... 3.41

APU ROM Check .......................................................................................... 3.41

Service Manual BSM-2300 3C.1

APU RAM Check .......................................................................................... 3.42

COM Check Menu Items ......................................................................................... 3.43

WS RECORDER Check ................................................................................ 3.43

SERIAL I/F Check ........................................................................................ 3.44

NETWORK CARD Check .............................................................................. 3.45

BATTERY Check ........................................................................................... 3.47

MULTI PARAMETER UNIT Check ................................................................3.48

ECG Check ................................................................................................... 3.49

OUTPUT Check ............................................................................................ 3.49

Recorder and Control Block Checks........................................................................ 3.50

SELF-TEST-PRO No.1 .................................................................................. 3.50

SELF-TEST-PRO No.2 .................................................................................. 3.51

SELF-TEST-PRO No.3 .................................................................................. 3.52

Calibration of Touch Screen .....................................................................................3.53

3C.2 Service Manual BSM-2300

Introduction

3. DIAGNOSTIC CHECK

The instrument has two check programs which automatically or manually diagnose

the instrument. The automatic check program (power on self check) is executed

whenever the instrument is turned on. The manual check program can be executed

at any time.

All errors detected during the power on self check, manual check, and any time in

monitor mode are stored in an error history table that you can view.

The manual check, error history, and system setup and initialization are accessed

from the DIAGNOSTIC CHECK screen.

Service Manual BSM-2300 3.1

3. DIAGNOSTIC CHECK

Power On Self Check

The following icon appears during the power on self check.

If no error is detected, the monitor mode begins and the patient monitoring display

appears. If a serious error which does not allow the host CPU to execute the system

program any more is detected, the screen changes to the following DIAGNOSTIC

CHECK screen and the error mesage is displayed.

If a minor error such as “Backup data is damaged” is detected, the monitor mode

begins and the patient monitoring display appears after the power on self check.

The detected error is stored in the error history table. Refer to “Calling Up the

Error History” section.

3.2 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

The MAIN board and Analog board are checked as follows:

• CPU ROM CHECK: Checks the system ROM for the host CPU on the MAIN

board. The MAIN board will be faulty if an error which causes a screen problem

is found.

• CPU RAM CHECK: Checks the system RAM for the host CPU and patient data

storage. The MAIN board will be faulty if an error which causes a screen

problem is found.

• DPU ROM CHECK: Checks the ROM for the CPU of the DPU on the MAIN

board. The MAIN board will be faulty if an error which causes a screen problem

or data/waveform display problem is found.

• DPU RAM CHECK: Checks the RAM for the CPU of the DPU on the MAIN

board. The MAIN board will be faulty if an error which causes a screen problem

or data/waveform display problem is found.

• APU ROM CHECK: Checks the ROM for the CPU of the APU on the Analog

board. The analog board will be faulty if an error which causes a screen problem

or data/waveform display problem is found.

• APU RAM CHECK: Checks the RAM for the CPU of the APU on the Analog

board. The analog board will be faulty if an error which causes a screen problem

or data/waveform display problem is found.

• CLOCK IC CHECK: Checks the real-time clock IC on the MAIN board. If the

date or time is wrong, the clock IC is initialized. The MAIN board will be faulty

if an error is found.

• E2PROM CHECK: Checks the backup memory for the system setup data storage.

If the data is wrong, the memory is initialized. The MAIN board will be faulty if

an error is found.

If a serious error is found in the abovementioned checks, the instrument displays

the DIAGNOSTIC CHECK screen without displaying the patient monitoring

screen.

The following data checks are also done. The data is corrected if necessary.

• BACK UP CHECK: Checks the backed up data. If the backed up data has

something wrong, the data is initialized.

• TIME CHECK: Checks correctness of the time.

• GET TIME CHECK: Checks the period during the power off and adjusts the time

data if it is wrong.

Service Manual BSM-2300 3.3

3. DIAGNOSTIC CHECK

Calling Up the DIAGNOSTIC CHECK Screen

Use this screen to view the error history or perform manual check or system setup

and initialization.

1. With the power off, press the Power switch while pressing the SILENCE

ALARMS key. Continue pressing the SILENCE ALARMS key until the

DIAGNOSTIC CHECK screen appears.

2. To exit the DIAGNOSTIC CHECK screen and return to the patient monitoring

mode, touch the “MONITOR MODE” key.

NOTE

After upgrading the instrument or adding the option to the instrument,

check that the software version is changed to the new one or a model

number of the option is displayed on the DIAGNOSTIC CHECK screen.

3.4 Service Manual BSM-2300

Calling Up the Error History

The ERROR HISTORY screen shows the error history of the instrument. The error

code, board name, time, and date the error occurred are listed on this screen. For an

explanation of error codes, see the “Error Codes” section. The error history data is

deleted whenever system initialization is performed.

1. From the DIAGNOSTIC CHECK screen, touch the “HISTORY” key. The

HISTORY screen appears. Then, touch the “ERROR HISTORY” key to display

the error history.

3. DIAGNOSTIC CHECK

Error Codes

2. Touch the “PRINT” key to print the screen with the recorder.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

When a fault is detected during operation or during the power on self check, the

error is stored in the error history table. The error codes stored in the error history

are only deleted when system initialization is performed. If the memory space for

the error history is filled up, however, the oldest error code is deleted when a new

error code is added.

The message and description of each error code are described in the following

table:

Error Code Message Description

0110 WATCH DOG ERROR Interrupt from the watch dog timer

0210 BUS ERROR Bus error occurred when an address

which is not used in the program was

selected

0220 ADDRESS ERROR Address error when a word with an odd

address is accessed

Service Manual BSM-2300 3.5

3. DIAGNOSTIC CHECK

0230 ILLEGAL INSTRUCTION Illegal command (not used in the

program) is executed

0240 ZERO DIVIDE Zero division error

0250 CHK INSTRUCTION Check command error when the CHK

command is executed

0260 TRAP INSTRUCTION Trap command error when the TRAPV

command is executed

0270 PRIVILEGE VIOLATION Privilege error when the CPU is in the

user mode and executes a supervisor

command

0280 SPRIOUS INTERRUPT Undefined interrupt error when the CPU

receives an undefined interrupt request

0290 UNDEFINED AUTO VECTOR N ot used

02A0 UNDEFINED TRAP No t used

02B0 UNDEFINED USER INT Not used

02C0 OTHER ERROR Errors other than the above mentioned

errors

0310 OS ERROR Error detected under the OS management

0400 OTHER Error from faults other than those

described above

0410 CPU (ROM) Error detected by CPU ROM check

0411 WS (ROM) Error detected by WS ROM check

0420 CPU (RAM) Error detected by CPU RAM check

0440 A/D, D/A Error detected by A/D and D/A check

0470 CLOCK Error detected by the real time clock IC

0472 CLK DATA Clock data error detected by CLOCK

DATA check

0480 E2PROM Error detected by EEPROM check

A410 DPU (ROM) Error detected by DPU ROM check

A420 DPU (RAM) Error detected by DPU RAM check

B410 APU (ROM) Error detected by ROM check in the APU

check.

B420 APU (RAM) Error detected by RAM check in the APU

check.

System Errors

3.6 Service Manual BSM-2300

A system error occurs when a fatal fault is detected during operation. All operation

of the instrument is halted and the CPU operation status data at the system error

appear on the left top of the screen. The system error is mostly stored in the error

history table. In a few seconds after the status data is displayed, the instrument

restarts. If the instrument repeats the restart, the MAIN board will be faulty.

Initializing the System

You can delete all stored waveforms and data and the error history and return all

settings to the factory defaults.

Initializing the system deletes all the patient data and error history, and

returns the setting conditions to their default settings.

3. DIAGNOSTIC CHECK

CAUTION

1. From the DIAGNOSTIC CHECK screen, touch the “SYSTEM INITIALIZE” key

until a SYSTEM INITIALIZE confirmation message appears. (Approximately 3

seconds)

All data and user settings are deleted.

2. To exit the DIAGNOSTIC CHECK screen and return to the patient monitoring

mode, touch the “MONITOR MODE” key.

Service Manual BSM-2300 3.7

3. DIAGNOSTIC CHECK

Performing Manual Check and Other Checks

The following checks are available.

With the SILENCE ALARMS key pressed

MANUAL CHECK

CPU CHECK

ROM Check

RAM Check

Hard Key

Check

Touch Key

Check

Sound Check

Alarm

Indicator

Check

Other Check

DIAGNOSTIC CHECK

SYSTEM SETUP SYSTEM INITIALIZE ERROR HISTORY

CRTC CHECK

Graphic Memory

Check

Character

Memory Check

Graphic Draw

Check

Character Draw

Check

Image Draw

Check

Power ON

DPU CHECK

D/A adjust

AD test

ZB I/F Check

NIBP Check

ROM Check

RAM Check

Power FREQ*

* Not used on the BSM-

2304A monitor

Press the MENU key

TOUCH PANEL CALIBRATION

APU CHECK

APU ROM Check

APU RAM Check

With the record key and NIBP

INTERVAL key pressed until the

patient monitoring screen appears

COM CHECK

WS Recorder

Check

Serial I/F Check

Network Card

Check

Battery Check

Multi Parameter

Unit Check

ECG Check

Output Check

Recorder and

Control Block

Checks

SELF-TEST

PRO No. 1

SELF-TEST

PRO No. 2

SELF-TEST

PRO No.3

Memory Card

Check

Back Light

Check

In most of these checks, if a fatal error is detected during the check, the operating system hangs. When the system hangs, turn

off the instrument and remove the cause.

3.8 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

Calling Up the MANUAL CHECK MENU Screen

1. From the DIAGNOSTIC CHECK screen, touch the “MANUAL CHECK” key.

The MANUAL CHECK MENU screen appears.

2. To test each item from the MANUAL CHECK MENU screen, touch a menu

item key.

3. To return to the DIAGNOSTIC CHECK screen, touch the “RETURN” key.

4. To exit the DIAGNOSTIC CHECK screen and return to the patient monitoring

mode, touch the “MONITOR MODE” key.

* POWER FREQ is not used on the BSM-2304A monitor

Service Manual BSM-2300 3.9

3. DIAGNOSTIC CHECK

CPU Check Menu Items

The CPU check menu items check the function of the CPU peripherals such as

ROMs, RAMs, switches, touch screen, sound generator, alarm indicator and

external memory card.

ROM Check

This item checks the ROMs on the MAIN board by the CRC (cyclic redundancy

check) technique. This check assigns a count number when one set of checks is

successfully completed. A set of checks takes about 2 minute and 20 seconds.

If an error message appears, the MAIN board will be faulty.

Procedure to Start and Exit the ROM Check Program

1. To select the ROM Check, touch the “ROM CHECK” key. The instrument

automatically starts the ROM check.

2. The instrument repeats the check and increments the pass count until you

touch the “RETURN” key.

3. If the check program finds an error, it displays the type of ROM (PROGRAM or

IMAGE) in the above area.

4. To return to the MANUAL CHECK MENU screen at any time, touch the

“RETURN” key.

3.10 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

RAM Check

This item checks the RAM on the MAIN board by comparing the test patterns (first

written to the RAM) with the test patterns (later read from the RAM). This test uses

15 test patterns and assigns a count number when a comparison of the 15 test

patterns is successfully completed. The comparison of all the test patterns in this

check takes about 4 minutes.

This check deletes the patient data. If an error message appears, the MAIN board

will be faulty.

Procedure to Start, Stop, and Exit the RAM Check Program

1. To select the RAM Check, touch the “RAM CHECK” key. The instrument

automatically starts the RAM check.

2. The instrument repeats the check and increments the pass count until the

operator touches the “RETURN” key.

3. If the check program finds an error, it displays the address, write data and read

data as shown in the above table.

4. To stop the check temporarily, touch the “STOP” key. The “START” key name

changes to normal and the “STOP” key is highlighted.

To continue the check, touch the “START” key again.

5. To return to the MANUAL CHECK MENU screen at any time, touch the

“RETURN” key.

Service Manual BSM-2300 3.11

3. DIAGNOSTIC CHECK

Hard Key Check

This item checks the operation of the hard keys on the front panel. The hard key

layout appear. Pressing the hard key usually highlights the corresponding hard

key on the screen.

If the pressed hard key is not highlighted, the key switch may be faulty. If more

than one hard key has this symptom, the operation board or MAIN board will be

faulty.

NOTE

The key does not give a key click sound when it is pressed in this

check.

Procedure to Start the Check Keys or to Exit the Key Check Program

1. To check the hard keys, touch the “HARD KEY CHECK” key.

2. In the above screen, confirm that the corresponding pressed key is highlighted

on the screen.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.12 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

Touch Key Check

This item checks the touch key operation and positioning. When you start the

check, the screen changes to the touch key check screen, and indicates the position

where you touched. When you touch the screen and move your finger or touch

pen, the target mark traces your position.

If the position of the target mark and the touched position do not match, calibrate

the touch screen.

If you execute the touch key calibration and the position is still incorrect, the

MAIN board or touch screen will be faulty.

Procedure to Start the Touch Key Check or to Exit the Touch Key Check Program

1. To check the touch key, touch the “TOUCH KEY CHECK” key.

2. On the above screen, confirm that the touched position matches the target

mark on the screen.

3. To return to the DIAGNOSTIC CHECK screen, press the HOME key.

Service Manual BSM-2300 3.13

3. DIAGNOSTIC CHECK

Sound Check

This item checks the 7 types of sounds generated by the instrument. This check

can also be used to check the alarm circuit and the QRS beep circuit. Check the

quality of sound, loudness, noise, incorrect sound, etc.

If there is no sound or distorted sound, the speaker or MAIN board will be faulty.

Procedure to Check the Sound

1. To check the sound, touch the “SOUND CHECK” key.

2. Touch a sound key, such as “ALARM SOUND1”, “ALARM SOUND2”,

“ALARM SOUND3”, “QRS BEEP (HIGH TONE)”, “QRS BEEP (LOW TONE)”,

“QRS BEEP (VARIABLE)”, “KEY CLICK” to start the check for that sound.

3. To stop the check, touch the “SOUND STOP” key.

4. To change the sound volume, touch the “↑” or “↓” key.

5. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.14 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

ALARM INDICATOR Check

This item checks the function of the alarm indicator located on the top of the

instrument. Check the light of indicator lamp according to the screen indication.

If the color does not light, the connection cable is loose or disconnected or the

MAIN board or indicator board will be faulty. If the indicator lights partially, the

indicator board is faulty.

Procedure to Start the ALARM INDICATOR Check Program

1. To select the Alarm Indicator Check, touch the “ALARM INDICATOR

CHECK” key. The lighting color is highlighted on the screen sequentially.

2. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.15

3. DIAGNOSTIC CHECK

OTHER Check

This item checks the clock IC and backup NVRAM (EEPROM). The NVRAM

contains the system setup data. The check program checks that there is no

difference between the data read from EEPROM and written data into EEPROM.

Therefore, this check does not damage the system setup data. If the clock IC and

NVRAM have no error, the “OK” message appears on the screen and current date

and time appear at the top of the screen. If an error message appears, the MAIN

board will be faulty.

Procedure to Execute the OTHER Check Program

1. To select the OTHER Check, touch the “OTHER CHECK” key.

The program starts the checking automatically and several minutes later, the

program displays the result of checking.

2. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.16 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

MEMORY CARD Check

This item checks the inserted PCMCIA card and its interface. There are two

checks. The ATTRIBUTE CHECK displays the dump list of attribute area which is

in the PCMCIA card. The COMMON CHECK is the write/read check for common

area. This check continues until you touch the “STOP” key or “RETURN” key.

The check method is the same as the system RAM check.

If the PCMCIA card is not inserted, the program displays the CARD NOT

INSERTED message on the screen.

If an error is detected, the PCMCIA card or MAIN board will be faulty.

Procedure to Start MEMORY CARD Check Program

1. To select the MEMORY CARD Check, touch the “MEMORY CARD CHECK”

key.

2. To display the dump list of attribute area which is in the memory card, touch

the “ATTRIBUTE CHECK” key.

3. To start the common check, touch the “COMMON CHECK” key.

If the check program finds an error, it displays the address, write data and read

data as shown in the above table.

4. To stop the check temporarily, touch the “STOP” key. The “START” key name

changes to normal and the “STOP” key is highlighted.

To continue the check, touch the “START” key again.

5. To return to the MANAUL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.17

3. DIAGNOSTIC CHECK

Backlight Check

This item checks the brightness control of the LCD backlight. While the

brightness is manually changed, check that it changes smoothly with no twinkling.

Check that the backlight goes off or has no twinkling when the brightness is set to

minimum.

If the brightness does not change smoothly or the light goes off in the middle of

the brightness bar on the screen, it indicates the end of life of the backlight or

faulty inverter board.

In that case, replace the inverter board or fluorescent tube (backlight lamp) with a

new one. Refer to Section 5 “Disassembly and Assembly”.

Procedure to Check the Brightness of the LCD Backlight

1. To select the Backlight Check, touch the “BACK LIGHT CHECK” key.

To control the brightness, touch the bargraph or the “↑” or “↓” key to increase

or decrease the brightness.

2. To return to the MANUAL CHECK MENU screen at any time, touch the

“RETURN” key.

3.18 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

CRTC Check Menu Items The CRTC check menu items check the function of the display control block,

including the LCD unit. These check results cannot be recognized by the host

CPU, so you must judge the result.

If an error is found, the MAIN board will be faulty.

GRAPHIC MEMORY Check and CHARACTER MEMORY Check

These items check the Graphic RAM and Character RAM on the MAIN board for

the waveform display or character display by the write/read check technique. If an

error is detected, the error bank, address and data are displayed as a table.

Procedure to Start the GRAPHIC MEMORY Check and CHARACTER

MEMORY Check Program

1. To select the GRAPHIC MEMORY Check or CHARACTER MEMORY

Check, touch the “GRAPHIC MEMORY CHECK” or “CHARACTER

MEMORY CHECK” key.

The “START” key is highlighted to indicate the process of checking.

If the check program finds an error, it displays the address (and block bank),

write data and read data as shown in the above table.

2. To stop the check temporarily, touch the “STOP” key. The “START” key name

changes to normal and the “STOP” key is highlighted.

To continue the check, touch the “START” key again.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.19

3. DIAGNOSTIC CHECK

GRAPHIC DRAW Check

This item checks the function of the graphic draw plane. Check the figure of

display and colors. The solid color screen allows you to find wrong LCD pixels.

10 planes for wave/graphic screen are available and the check program displays 2

planes at a time.

If the screen has a wrong display, the MAIN board or LCD unit will be faulty.

Procedure to Execute the GRAPHIC DRAW Check Program

1. To select the Check, touch the “GRAPHIC DRAW CHECK” key.

Touch the “PLANE 1 - PLANE 3” to “PLANE 17 - PLANE 19” key on the

screen to display the plane combination.

When the program starts, it draws the grid line first.

2. To change the pattern to the triangular waveform, touch the screen.

After touching the screen again, the screen shows you a solid color. The

patterns are changed every time you touch the screen.

3. To change the plane combination, such as 2 planes or ALL, press the NIBP

INTERVAL key.

To change graphic color, press the SILENCE ALARMS key.

4. To scroll the waveform in the triangular waveform display mode, press the

MENU key.

Press the RECORD key to change the amplitude of each waveform.

5. To return to the GRAPHIC DRAW CHECK screen, press the HOME key.

6. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.20 Service Manual BSM-2300

Screen Flow of GRAPHIC DRAW Check Program

Touch Key

3. DIAGNOSTIC CHECK

Touch Key

MENU key

For the TFT LCD screen, it is considered normal if some pixels have randomly

abnormal color or do not light. (Up to 6 wrong pixels are considered normal at the

maximum brightness.)

Service Manual BSM-2300 3.21

3. DIAGNOSTIC CHECK

CHARACTER DRAW Check

This item checks the function of the character draw plane and ASCII font display.

Check the character display and colors. 2 planes for character screen are available

and the check program displays one plane at a time.

If the screen has a wrong display, the MAIN board or LCD unit will be faulty.

Procedure to Execute the CHARACTER DRAW Check Program

1. To select the CHARACTER DRAW Check, touch the “CHARACTER DRAW

CHECK” key and select a plane.

When the program starts, it draws the green characters on the black plane.

2. To reverse the plane color, touch the “CHANGE BACK COLOR” key.

If you press the MENU key, you can change the display mode in order of normal → blink → reverse → reverse and blink → normal.

3. To change the color of the character, press the SILENCE ALARMS key.

The NIBP INTERVAL key selects another plane.

4. To return to the CHARACTER DRAW CHECK screen, press the HOME key.

5. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.22 Service Manual BSM-2300

Screen Flow of CHARACTER DRAW Check Program

3. DIAGNOSTIC CHECK

Service Manual BSM-2300 3.23

3. DIAGNOSTIC CHECK

IMAGE DRAW Check

This item checks the function of the image draw plane and bit map character

display. All the icons messages and bitmap images are displayed one by one.

Check the image display and background colors.

If the screen has a wrong display, the MAIN board or LCD unit will be faulty.

Procedure to Start the IMAGE DRAW Check Program

1. To select the IMAGE DRAW Check, touch the “IMAGE DRAW CHECK” key.

When the program starts, it draws the white image on the black plane.

2. To reverse the plane color, touch the “CHANGE BACK COLOR” key.

3. To change the images by ten, press the NIBP INTERVAL key.

To change the image one by one, touch the “UP” or “DOWN” key on the

screen.

4. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.24 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

DPU Check Menu Items

The DPU check items check the communication between the Analog board and

DPU or between the NIBP board and DPU.

D/A ADJUST

This item is used to check the output voltage level of the D to A converter.

Connect a digital multimeter or oscilloscope to the ZB-900P socket (Pin 1: Analog

output, Pin 2: Ground) and check the following output signals.

D to A output

DC 2.5 V 2.500 V ±5% DC 0 V CHECK 0 V ±100 mV DC +5 V CHECK +5.000 V ±5% AC 30 Hz 30 Hz ±5%

Procedure to Start the D/A Adjust Check

1. To select the D/A Adjust Check, touch the “D/A ADJUST” key at the DPU

CHECK column. The program outputs 2.5 V DC.

The “DC 2.5 V” key is highlighted to indicate the status of output.

2. To change the output voltage or waveform, touch each name of the other keys.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.25

3. DIAGNOSTIC CHECK

AD TEST

This is not a check. The AD Test table shows the A to D converted values of all the

analog parameters such as ECG, SpO

and NIBP.

Each vital sign data are read from the A to D converter every 2 ms. The maximum

and minimum data of each vital sign data are displayed every 512 ms.

CH1 (ECG1): ECG1 waveform data with the hum filter set to off

CH2 (ECG1 HUM): ECG1 waveform data with the hum filter set to on

CH3 (ECG2): ECG2 waveform data with the hum filter set to off

CH4 (ECG2 HUM): ECG2 waveform data with the hum filter set to on

CH5 (RESP): Respiration waveform data

CH6 (PIC): Not used

CH7 (NIBP): NIBP measurement data

CH8 (SpO2): Plethysmographic pulse wave data

CH9 (MP1): Multi-parameter 1 socket input data

CH10 (MP2): Not used

CH11 (MP3): Not used

Procedure to start the AD Test

1. To select the AD Test, touch the “AD TEST” key at the DPU CHECK column.

The program shows above table automatically.

2. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.26 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

ZB I/F Check

This check is used to check the signal lines when the ZB-900PG/K transmitter is

connected to the instrument or the pins 2, 3 and 6 of the ZB socket short and pins 7

and 8 short for loop back test. If the signal lines have no problem, a “ZB

CONNECTION” message appears. If there is a problem, a “ZB NO CONNECTION”

message appears.

Procedure to start the ZB I/F Check

1. To select the ZB I/F Check, touch the “ZB I/F CHECK” key at the DPU

CHECK column.

2. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.27

3. DIAGNOSTIC CHECK

NIBP Check

This NIBP check program checks the two pressure sensors, safety opreation, pump,

valves, air leakage and block. The check program consists of the following check

items:

1. Calibration Sensor 1: Checks the pressure sensor for NIBP measurement circuit.

Calibration Sensor 2:Checks the pressure sensor for NIBP safety circuit.

2. Zero Calibration: Checks the zeroing.

3. Safety Check: Checks the safety circuit operation.

3-1 OVER PRESS1:Checks the pressure lmitter.

3-2 OVER PRESS2:Checks the pressure continuous time.

4. Inflation Speed: Checks the time that the inflation pressure reaches to the

specified pressure.

4-1 Adult: Checks the inflation speed with 700

mL dummy cuff.

4-2 Neonate: Check the inflation speed with 72

mL dummy cuff.

5. Pressure Hold: Checks that the inflation pressure is held for a specified

time.

6. Step Deflation: Checks the valve operation.

7. Air leak: Not used.

8. Air Circuit: Checks that there is no air block.

To perform the check items, prepare the following tools:

Hand bulb pump

Mercury manometer

Y-branch connector (The Y-branch connector connects one tube of the dummy

cuff to the hand bulb pump and manometer.)

700 mL dummy cuff YS-077P1 (A 700 ml dummy cuff is a solid container that

withstands high pressure. The inner volume of this container must be 700 ml.)

250 mL dummy cuff YS-077P2

72 mL dummy cuff 6443-000022B

Two 3.5 m air hoses (YN-901P for adult/child and YN-921P for neonate)

3.28 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

Procedure to select the item and start the NIBP Check

1. To select the NIBP Check, touch the “NIBP CHECK” key at the DPU CHECK

column. The program changes the screen to the NIBP CHECK.

2. Touch the “SELECT” key to select the check item number.

3. Touch the “START” key to start the check for the selected check item.

NOTE

Make sure there is no pressure applied on the cuff connector before

pressing the “START” key. The program considers the pressure of the

cuff connector as 0 mmHg at the start of the check.

4. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

1. Calibration

The Calibration Check program is not used for calibration but is used to display

the accuracy of the two pressure sensors (Sensor 1 and Sensor 2). The accuracy of

each sensor changes with the measuring pressure. The following table shows the

acceptable accuracy range of the two pressure sensors at different pressure ranges.

Pressure Range Acceptable Accuracy Range 0 - 300 mmHg ±3 mmHg

Pressure Range Acceptable Accuracy Range 0 - 15 mmHg −2 mmHg to +3 mmHg 16 - 200 mmHg ±8 mmHg 201 - 300 mmHg ±12 mmHg

Checking the Pressure Sensor Accuracy

NOTE

Before performing the following check, perform “2. ZERO

CALIBRATION” first and check that “OK” appears on the screen.

1. Connect the manometer and hand bulb pump to the dummy cuff using the Y-

branch connector and connect the dummy cuff to the instrument with the air

hose as shown on the next page.

Service Manual BSM-2300 3.29

3. DIAGNOSTIC CHECK

Y-branch connector

2. Touch the “SELECT ↑” or “SELECT ↓” key to select the “1. CALIBRATION”

item.

3. Touch the “START” key to start the check.

4. Immediately start pumping the hand bulb pump. Stop pumping the hand bulb

pump when the pressure reading displayed on the NIBP Check display of the

instrument is within one of the above mentioned pressure ranges (0 to 300

mmHg at SENSOR1 or 0 to 15 mmHg, 16 to 200 mmHg or 201 to 300 mmHg

at SENSOR 2).

5. Compare the pressure reading displayed on the NIBP Check display with the

pressure reading on the manometer and check that the difference between the

two pressure readings is within the acceptable accuracy range.

6. Repeat steps 4 and 5 for a reading in the other pressure range.

If the accuracy of the pressure sensor for any of the two pressure ranges is out

of the acceptable accuracy range, replace the NIBP board or pneumatic

component such as air tube or valve with a new one.

2. Zero Calibration

This program is not used for calibration but is used for pressure zeroing.

Checking the Pressure Zeroing

NOTE

Do not connect any air hose to the NIBP socket on the instrument.

3.30 Service Manual BSM-2300

1. Touch the “SELECT ↑” or “SELECT ↓” key to select the “2. ZERO

CALIBRATION” item.

2. Touch the “START” key to start the check.

3. DIAGNOSTIC CHECK

Y-branch connector

3. Check that “OK” appears on the screen.

If an error message apeears, replcae the NIBP board or pnuematic component

such as pump or valve with a new one.

3. Safety Check

This check program has the following two check items.

3-1. OVER PRESS1

Checking the Safety Operation

1. Connect the manometer and hand bulb pump to the 700 mL or 72 mL dummy

cuff using a Y-branch connector and connect the dummy cuff to the instrument

with the 3.5 m long adult or neonatal air hose as shown below. The adult air

hose must be used with the 700 mL dummy cuff and neonatal air hose must be

used with the 72 mL dummy cuff.

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “3-1. OVER

PRESS1” item.

3. Touch the “START” key to start the check program.

4. Immediately increase the pressure inside the dummy cuff and manometer with

the hand bulb pump until the pressure reaches to 300 mmHg (for adult) or 150

mmHg (for neonate).

5. After getting the specified pressure, slowly increase the pressure with the hand

bulb pump and check that the pressure is released within the range of 300 to

330 mmHg (for adult) or 150 to 165 mmHg (for neonate) by the safety valve.

Service Manual BSM-2300 3.31

3. DIAGNOSTIC CHECK

3-2. OVER PRESS2

Checking the Safety Operation

1. Connect the manometer and hand bulb pump to the 700 mL or 72 mL dummy

cuff using a Y-branch connector and connect the dummy cuff to the instrument

with the 3.5 m long adult or neonatal air hose as shown below. The adult air

hose must be used with the 700 mL dummy cuff and neonatal air hose must be

used with the 72 mL dummy cuff.

Y-branch connector

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “3-2. OVER

PRESS2” item.

3. Touch the “START” key to start the check program.

4. Immediately increase the pressure inside the dummy cuff and manometer with

the hand bulb pump until the pressure reaches to 300 mmHg (for adult) or 150

mmHg (for neonate).

5. After getting the specified pressure, stop pumping the hand bulb pump and

check that the pressure is released within the range of 10 to 15 seconds by the

time limiter and safety valve.

If the abovementioned checks show an error, replace the NIBP board or

pneumatic component such as valve and tube with a new one.

3.32 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

4. Inflation Speed

This check program has the following two check items.

4-1. ADULT

Checking the Inflation Speed

1. Connect the 700 mL dummy cuff to the instrument with the 3.5 m long adult/

child air hose as shown below.

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “4-1. ADULT”

item.

3. Touch the “START” key to start the check program. The instrument increases

the pressure in the dummy cuff up to 200 mmHg.

4. Check that it takes 7 seconds or less to changes from zero pressure to 200

mmHg. If it takes more than 7 seconds, “ERROR” appears on the screen. In

this case, replace the NIBP board or pneumatic component such as pump,

valve or tube with a new one.

4-2. NEONATAL

Checking the Inflation Speed

1. Connect the 72 mL dummy cuff to the instrument with the 3.5 m long neonatal

air hose as shown below.

Service Manual BSM-2300 3.33

3. DIAGNOSTIC CHECK

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “4-2.

NEONATAL” item.

3. Touch the “START” key to start the check program. The instrument increases

the pressure in the dummy cuff up to 200 mmHg.

4. Check that it takes 7 seconds or less to changes from zero pressure to 200

mmHg. If it takes more than 7 seconds, “ERROR” appears on the screen. In

this case, replace the NIBP board or pneumatic component such as pump,

valve or tube with a new one.

5. Pressure Hold

Checking the Pressure Hold

1. Connect the 250 mL dummy cuff and hand bulb pump to the instrument with

the 3.5 m long adult/child air hose as shown below.

pinch the hose in step 4

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “5. PRESSURE

HOLD” item.

3. Touch the “START” key to start the check program. The “START” key

changes to “MEASURE START” key and blinks.

4. Immediately increase the pressure inside the dummy cuff with the hand bulb

pump up to about 250 mmHg and pinch the hose of the hand bulb pump.

5. When the pressure becomes stable, touch the blinking “MEASURE START”

key to measure the pressure. The blinking stops. The instrument displays the

values of the pressure 10 seconds after and pressure 20 seconds after the

“MEASURE START” key is pressed. Check that the pressure difference

between the two pressures is within 5 mmHg. If it is more than 5 mmHg, an

“ERROR” message appears and the NIBP board or pneumatic component such

as pump, valve or tube is faulty.

3.34 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

6. Step Deflation

6-1. V1 250 mmHg

Checking the Valve 1 at the High Pressure

1. Connect the 250 mL dummy cuff and hand bulb pump to the instrument with

the 3.5 m long adult/child air hose as shown below.

pinch the hose in step 4

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “6-1. V1

250mmHg” item.

3. Touch the “START” key to start the check program. The “START” key

changes to “MEASURE START” key and blinks.

4. Immediately increase the pressure inside the dummy cuff with the hand bulb

pump up to about 250 mmHg and pinch the hose of the hand bulb pump.

5. When the pressure becomes stable, touch the blinking “MEASURE START”

key to measure the pressure. The blinking stops. The instrument displays the

pressure value after the valve 1 opens for 50 milliseconds. Check that the

pressure difference between the two pressures is within the range of 7 to 23

mmHg. If the pressure difference is out of the range, and “ERROR” message

appears and the NIBP board or pneumatic component such as pump, valve or

tube is faulty.

6-2. V2 250 mmHg

Checking the Valve 2 at the High Pressure

1. Connect the 72 mL dummy cuff and hand bulb pump to the instrument with

the 3.5 m long adult/child air hose as shown below.

pinch the hose in step 4

Service Manual BSM-2300 3.35

3. DIAGNOSTIC CHECK

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “6-2. V2

250mmHg” item.

3. Touch the “START” key to start the check program. The “START” key

changes to “MEASURE START” key and blinks.

4. Immediately increase the pressure inside the dummy cuff with the hand bulb

pump up to about 250 mmHg and pinch the hose of the hand bulb pump.

5. When the pressure becomes stable, touch the blinking “MEASURE START”

key to measure the pressure. The blinking stops. The instrument displays the

pressure value after the valve 2 opens for 50 milliseconds. Check that the

pressure difference between the two pressures is within the range of 5 to 15

mmHg. If the pressure difference is out of the range, an “ERROR” message

appears and the NIBP board or pneumatic component such as pump, valve or

tube is faulty.

6-3. V1 20 mmHg

Checking the Valve 1 at the Low Pressure

1. Connect the 250 mL dummy cuff and hand bulb pump to the instrument with

the 3.5 m long adult/child air hose as shown below.

pinch the hose in step 4

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “6-3. V1

20mmHg” item.

3. Touch the “START” key to start the check program. The “START” key

changes to “MEASURE START” key and blinks.

4. Immediately increase the pressure inside the dummy cuff with the hand bulb

pump up to about 20 mmHg and pinch the hose of the hand bulb pump.

5. When the pressure becomes stable, touch the blinking “MEASURE START”

key to measure the pressure. The blinking stops. The instrument displays the

pressure value after the valve 1 opens for 120 milliseconds. Check that the

pressure difference between the two pressures is within the range of 2 to 8

mmHg. If the pressure difference is out of the range, an “ERROR” message

appears and the NIBP board or pneumatic component such as pump, valve or

tube is faulty.

3.36 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

6-4. V2 20 mmHg

Checking the Valve 2 at the Low Pressure

1. Connect the 72 mL dummy cuff and hand bulb pump to the instrument with

the 3.5 m long adult/child air hose as shown below.

pinch the hose in step 4

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “6-4. V2

20mmHg” item.

3. Touch the “START” key to start the check program. The “START” key

changes to “MEASURE START” key and blinks.

4. Immediately increase the pressure inside the dummy cuff with the hand bulb

pump up to about 20 mmHg and pinch the hose of the hand bulb pump.

5. When the pressure becomes stable, touch the blinking “MEASURE START”

key to measure the pressure. The blinking stops. The instrument displays the

pressure value after the valve 2 opens for 100 milliseconds. Check that the

pressure difference between the two pressures is within the range of 2 to 8

mmHg. If the pressure difference is out of the range, an “ERROR” message

appears and the NIBP board or pneumatic component such as pump, valve or

tube is faulty.

7. Air Leak

Since “5. Pressure Hold” check covers this check which requires the special tool

(not available locally), this check is not necessary for you.

8. Air Circuit

1. Disconnect any air hose from the NIBP socket on the instrument.

2. Touch the “SELECT↑” key or “SELECT↓” key to select the “8. AIR

CIRCUIT” item.

3. Touch the “START” key to start the check program. The pump works.

4. Check that “OK” message appears on the screen after about 5 seconds.

If “ERROR” message appears, the pneumatic component such as pump, valve

or tube will be faulty.

Service Manual BSM-2300 3.37

3. DIAGNOSTIC CHECK

DPU ROM Check

This item checks the ROM in the DPU on the MAIN board by the CRC (cyclic

redundancy check) technique. This check assigns a count number when one set of

checks is successfully completed.

If an error message appears, the MAIN board will be faulty.

Procedure to Start and Exit the DPU ROM Check Program

1. To select the DPU ROM Check, touch the “ROM CHECK” key at the DPU

CHECK column.

The instrument repeats the check and increments the pass count until you

touch the “RETURN” key.

If the check program finds an error, it displays the “ERROR” message on the

screen.

2. To return to the MANUAL CHECK MENU screen at any time, touch the

“RETURN” key.

3.38 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

DPU RAM Check

This item checks the RAM in the DPU on the MAIN board by comparing the test

patterns (first written to the RAM) with the test patterns (later read from the RAM).

If an error message appears, the DPU board will be faulty.

Procedure to Start, Stop, and Exit the DPU RAM Check Program

1. To select the DPU RAM Check, touch the “RAM CHECK” key at the DPU

CHECK column. The check program automatically starts.

The “START” key is highlighted to indicate the process of checking.

If the check program finds an error, it displays the address, written data and

read data on the screen.

2. To stop the check temporarily, touch the “STOP” key. The highlighted

“START” key changes to normal and the “STOP” key is highlighted.

To resume the check, touch the “START” key again.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

Service Manual BSM-2300 3.39

3. DIAGNOSTIC CHECK

Power FREQ

This check program detects the line frequency and shows it.

Not used on the BSM-2304A monitor.

3.40 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

APU Check Menu Items

The APU check items check the APU on the Analog board.

APU ROM Check

This item checks the ROM in the APU on the Analog board by the CRC (cyclic

redundancy check) technique. This check assigns a count number when one set of

checks is successfully completed.

If an error message appears on the screen, the Analog board will be faulty.

Procedure to Start and Exit the APU ROM Check Program

1. To select the APU ROM Check, touch the “ROM CHECK” key at the APU

CHECK column.

The instrument repeats the check and increments the pass count until you

touch the “RETURN” key.

If the check program finds an error, it displays the “ERROR” message on the

screen.

2. To return to the MANUAL CHECK MENU screen at any time, touch the

“RETURN” key.

Service Manual BSM-2300 3.41

3. DIAGNOSTIC CHECK

APU RAM Check

This item checks the RAM in the APU on the Analog board by comparing the test

patterns (first written to the RAM) with the test patterns (later read from the RAM).

If an error message appears on the screen, the Analog board will be faulty.

Procedure to Start, Stop and Exit the APU RAM Check Program

1. To select the APU RAM Check, touch the “RAM CHECK” key at the APU

CHECK column. The check program automatically starts. The “START” key

is highlighted to indicate the process of checking.

If the check program finds an error, it displays the address, written data and

read data on the screen.

2. To stop the check temporarily, touch the “STOP” key on the screen. The

highlighted “START” key changes to normal and the “STOP” key is

highlighted.

To resume the check, touch the “START” key again.

3. To return to the MANUAL CHECK MENU screen, touch the “RETURN” key.

3.42 Service Manual BSM-2300

3. DIAGNOSTIC CHECK

COM Check Menu Items The COM check items check the communication between the host CPU and

recorder CPU and serial communication at the AUX socket.

WS RECORDER Check

This item checks the dual port RAM in the ASIC (RACOON) and recorder CPU

peripherals with the communication between the host CPU and recorder CPU. The

optional recorder is one of the peripherals for the host CPU.

If an error is found, the MAIN borad or REC MAIN board will be faulty.

Procedure to Start the WS RECORDER Check Program

1. To select the WS RECORDER Check, touch the “WS RECORDER CHECK”

key at the COM CHECK column.

2. Touch the PRINT TEST PATTERN “START” key. The host CPU

communicates with the recorder CPU so that the above test pattern is recorded

on the paper.

The “START” key is highlighted to indicate the process of checking.

Until you touch the “STOP” key, paper runs continuously.

If the magazine is open or there is no paper, these status are displayed on the

screen. If the status is not displayed in such condition, the MAIN board, REC

MAIN board or recorder unit will be faulty.

Service Manual BSM-2300 3.43

Nihon Kohden BSM-2300 User manual

Specifications and Main Features

Frequently Asked Questions

User Manual

CONTENTS

Conventions Used in this Manual and Instrument

Section 1 General

Introduction

General Information on Servicing

Service Policy, Service Parts and Patient Safety Checks

Specifications

Composition

Panel Descriptions

Storage and Transport

Hard Keys and Soft Keys

Block Diagram

Section 2 Troubleshooting

General

Power-Related Problems

Display Problems

Sound Problems

Key Operation Problems

ECG and Respiration by Impedance Method Problems

SpO2 Problems

Non-invasive Blood Pressure Problems

Temperature Problems

Other Vital Sign Input Problems

Option Problems

Recording Problems

QI-231P Interface Problems

QI-236P Interface Problems

Section 3 Diagnostic Check

Introduction

Power On Self Check

Calling Up the DIAGNOSTIC CHECK Screen

Calling Up the Error History

Initializing the System

Performing Manual Check and Other Checks