Nihon-Kohden TEC-7600, TEC-7700 Service manual

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TEC-7621C

TEC-7631C

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TEC-7631E

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TEC-7721K

TEC-7731K

SERVICE MANUAL

DEFIBRILLATOR

TEC-7600/TEC-7700

0634-002039D

Contents

GENERAL HANDLING PRECAUTIONS ......................................................................... i

WARRANTY POLICY .................................................................................................... ii

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

Dangers, Warnings, Cautions and Notes ............................................................ iv

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

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

Models and Functions ................................................................................................ 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

Maintenance Equipments and Tools ........................................................................... 1.5

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

Defibrillator ....................................................................................................... 1.6

Non Invasive Blood pressure, NIBP (When optinal SG-761VC/VE/VK NIBP Unit

is installed).......................................................................................................1.8

Noninvasive Pacing (TEC-7631/7731 series only) ............................................1.8

External Paddle (ND-782VC/VE/VK) ................................................................1.8

Battery ............................................................................................................. 1.8

Clock Accuracy................................................................................................1.9

Environment .....................................................................................................1.9

Electromagnetic Compatibility..........................................................................1.9

Safety .............................................................................................................. 1.9

Monitor .............................................................................................................1.9

ECG Amplifier ................................................................................................1.10

Recorder ......................................................................................................... 1.10

Rhythm Recognition Detector ........................................................................ 1.10

Power Requirements ...................................................................................... 1.10

Dimensions and Weight .................................................................................. 1.11

Panel Description ............................................................................................................... 1.12

Front Panel ............................................................................................................... 1.12

Top Panel (TEC-7631/7731 Series Only) .................................................................. 1.13

External Paddles ...................................................................................................... 1.14

Left Side Panel ......................................................................................................... 1.14

Rear Panel ............................................................................................................... 1.15

Bottom Panel ........................................................................................................... 1.15

Composition ....................................................................................................................... 1.16

Standard Components ....................................................................................1.16

Options .......................................................................................................... 1.20

Board/Unit Location ............................................................................................................ 1.23

TEC-7600 Series Defibrillator ................................................................................... 1.23

Service Manual TEC-7600/7700 C.1

CONTENTS

TEC-7700 Series Defibrillator ................................................................................... 1.24

Block Diagram .................................................................................................................... 1.25

TEC-7600 Series Defibrillator ................................................................................... 1.25

TEC-7700 Series Defibrillator ................................................................................... 1.26

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

How to Troubleshoot ............................................................................................................. 2.1

Error Code ............................................................................................................................2.2

Defibrillation ............................................................................................................... 2.3

Operation Panel..........................................................................................................2.5

Communication .......................................................................................................... 2.6

Data Error...................................................................................................................2.7

Pacing (TEC-7631/7731 Series Only) .........................................................................2.7

12 Lead ECG Measurement .......................................................................................2.8

Message...............................................................................................................................2.9

Instrument and SpO2/CO2 Measurement ..................................................................... 2.9

NIBP Measurement ..................................................................................................2.11

12 Lead ECG Measurement ..................................................................................... 2.11

Troubleshooting .................................................................................................................. 2.12

General ..................................................................................................................... 2.12

Defibrillation ............................................................................................................. 2.13

Monitoring ................................................................................................................ 2.14

Recording .................................................................................................................2.18

Battery ..................................................................................................................... 2.18

Pacing (TEC-7631/7731 Series Only) ....................................................................... 2.19

Section 3 Disassembly ......................................................................... 3C.1

TEC-7621/7631 Series

Before You Begin ...............................................................................................................3.1.1

Warnings, Cautions and Notes ................................................................................ 3.1.1

Required Tools ......................................................................................................... 3.1.1

Connection Diagram (TEC-7621/7631 Series) ................................................................... 3.1.2

Removing the Lower Casing .............................................................................................. 3.1.4

Removing the Paddles ............................................................................................ 3.1.4

Removing the Battery Pack .................................................................................... 3.1.5

Removing the Lower Casing .................................................................................... 3.1.5

Removing the AC/DC Unit ................................................................................................. 3.1.6

Removing the Main Board ................................................................................................. 3.1.7

Removing the Main Chassis ................................................................................... 3.1.7

Removing the Main Board ....................................................................................... 3.1.8

Removing the HV Inductor ................................................................................................ 3.1.9

Removing the HV Capacitor and Relay Unit .................................................................... 3.1.10

Cable Connections of the High voltage Unit .......................................................... 3.1.11

Removing the Test Load Board........................................................................................ 3.1.12

Removing the Speaker .................................................................................................... 3.1.13

Removing the Pacer Board (TEC-7631 Series Only) ....................................................... 3.1.14

Removing the LCD Unit ................................................................................................... 3.1.15

C.2 Service Manual TEC-7600/7700

CONTENTS

Removing the Main Key Board and Key Board ................................................................ 3.1.16

Removing the Recorder Unit............................................................................................ 3.1.17

Removing the Paddle Locks ............................................................................................3.1.18

Removing the Battery Connector..................................................................................... 3.1.19

TEC-7721/7731 Series

Before You Begin ...............................................................................................................3.2.1

Warnings, Cautions and Notes ................................................................................ 3.2.1

Required Tools ......................................................................................................... 3.2.1

Connection Diagram (TEC-7721/7731 Series Defibrillator).................................................3.2.2

Removing the Lower Casing .............................................................................................. 3.2.4

Removing the Paddles ............................................................................................ 3.2.4

Removing the Battery Pack .................................................................................... 3.2.5

Removing the Lower Casing .................................................................................... 3.2.5

Removing the AC/DC Unit ................................................................................................. 3.2.6

Removing the Main Board ................................................................................................. 3.2.7

Removing the Main Chassis ................................................................................... 3.2.7

Removing the Main Board and Terminal Bracket .....................................................3.2.9

Removing the HV Capacitor and Biphasic HV Unit ......................................................... 3.2.10

Removing the Test Load Board........................................................................................ 3.2.11

Removing the Speaker .................................................................................................... 3.2.12

Removing the Pacer Board (TEC-7731 Series Only) ....................................................... 3.2.13

Removing the LCD Unit ................................................................................................... 3.2.14

Removing the Main Key Board and Key Board ................................................................ 3.2.15

Removing the Recorder Unit............................................................................................ 3.2.16

Removing the Paddle Locks ............................................................................................3.2.17

Removing the Battery Connector..................................................................................... 3.2.18

Installing the Optional Unit

General .............................................................................................................................. 3.3.1

Installation Procedure ........................................................................................................ 3.3.2

Installing the VP-761V/VC/VE Voice Prompt Board.................................................3.3.3

Operation Check ...........................................................................................3.3.3

Installing the QI-762V DSI Interface Board or QI-763V DSI/AUX OUT

Interface Board .......................................................................................................3.3.4

Operation Check ...........................................................................................3.3.4

Installing the AC-761VA/VC/VE/VK 12 Lead ECG Unit ...........................................3.3.5

Operation Check ...........................................................................................3.3.6

Installing the SG-761VC/VE/VK NIBP Unit ............................................................. 3.3.6

Operation Check ...........................................................................................3.3.7

Installing the QI-761V ZB Interface Unit ................................................................. 3.3.8

Operation Check ......................................................................................... 3.3.10

Section 4 Maintenance ......................................................................... 4C.1

General ................................................................................................................................. 4.1

Daily Checks....................................................................................................4.1

Monthly Checks ...............................................................................................4.1

System Maintenance Screen ............................................................................................... 4.2

Service Manual TEC-7600/7700 C.3

CONTENTS

Calling Up the System Maintenance Screen ..............................................................4.2

About the Menu Items ................................................................................................ 4.3

System Maintenance Screen Flowchart ...........................................................4.4

Default Settings ............................................................................................... 4.5

Flash Save Procedure ................................................................................................4.6

Configuration Screen .................................................................................................. 4.7

Adjust AD Screen ...................................................................................................... 4.8

Adjust ECG/AD Screen .................................................................................... 4.8

Adjust HV AD Screen .................................................................................... 4.10

TEC-7621/7631 Series Defibrillator .......................................................... 4.10

TEC-7721/7731 Series Defibrillator .......................................................... 4.12

Adjust Battery AD Screen .............................................................................. 4.14

Check Hardware Screen ........................................................................................... 4.15

Check Key Screen ......................................................................................... 4.15

Check LED Screen ........................................................................................ 4.17

Check LCD Screen ........................................................................................ 4.17

Check Recorder Screen ................................................................................. 4.17

Check Time Constant Screen ........................................................................ 4.18

Check Memory Screen ................................................................................... 4.19

Check Buzzer Screen .................................................................................... 4.19

Check Voice Screen ....................................................................................... 4.20

Check NIBP Screen ....................................................................................... 4.21

Check 12 Lead Screen ...................................................................................4.30

Check ECG Frequency Screen ...................................................................... 4.31

A/D View Screen ......................................................................................................4.32

Operation Time Screen ............................................................................................. 4.32

Version Up Screen ................................................................................................... 4.33

Debug Mode Screen .................................................................................................4.33

Check String Screen ...................................................................................... 4.34

Memory Dump Screen ................................................................................... 4.34

Protocol Analysis Screen ............................................................................... 4.35

Card Attribute Screen ..................................................................................... 4.35

Periodic Replacement Schedule ......................................................................................... 4.36

Maintenance Check Sheet ................................................................................................. 4.37

Section 5 Replaceable Parts List......................................................... 5C.1

TEC-7621/7631 Series Defibrillator ....................................................................................... 5.2

TEC-7721/7731 Series Defibrillator ....................................................................................... 5.6

KD-022A Cart ..................................................................................................................... 5.10

C.4 Service Manual TEC-7600/7700

GENERAL HANDLING PRECAUTIONS

This device is intended for use only by qualified medical personnel. Use only Nihon Kohden approved products with this device. Use of non-approved products or in a non-approved manner may affect the performance specifications of the device. This includes, but is not limited to, batteries, recording paper, pens, extension cables, electrode leads, input boxes and AC power.

Please read these precautions thoroughly before attempting to operate the instrument.

1. To safely and effectively use the instrument, its operation must be fully understood.

2. When installing or storing the instrument, take the following precautions:

(1) Avoid moisture or contact with water, extreme atmospheric pressure, excessive humidity and temperatures, poorly

ventilated areas, and dust, saline or sulphuric air.

(2) Place the instrument on an even, level floor. Avoid vibration and mechanical shock, even during transport.

(3) Avoid placing in an area where chemicals are stored or where there is danger of gas leakage.

(4) The power line source to be applied to the instrument must correspond in frequency and voltage to product

specifications, and have sufficient current capacity.

(5) Choose a room where a proper grounding facility is available.

3. Before Operation

(1) Check that the instrument is in perfect operating order.

(2) Check that the instrument is grounded properly.

(3) Check that all cords are connected properly.

(4) Pay extra attention when the instrument is in combination with other instruments to avoid misdiagnosis or other

problems.

(5) All circuitry used for direct patient connection must be doubly checked.

(6) Check that battery level is acceptable and battery condition is good when using battery-operated models.

4. During Operation

(1) Both the instrument and the patient must receive continual, careful attention.

(2) Turn power off or remove electrodes and/or transducers when necessary to assure the patient’s safety.

(3) Avoid direct contact between the instrument housing and the patient.

5. To Shutdown After Use

(1) Turn power off with all controls returned to their original positions.

(2) Remove the cords gently; do not use force to remove them.

(3) Clean the instrument together with all accessories for their next use.

6. The instrument must receive expert, professional attention for maintenance and repairs. When the instrument is

not functioning properly, it should be clearly marked to avoid operation while it is out of order.

7. The instrument must not be altered or modified in any way.

8. Maintenance and Inspection:

(1) The instrument and parts must undergo regular maintenance inspection at least every 6 months.

(2) If stored for extended periods without being used, make sure prior to operation that the instrument is in perfect

operating condition.

Service Manual TEC-7600/7700 i

(3) Technical information such as parts list, descriptions, calibration instructions or other information is available for

qualified user technical personnel upon request from your Nihon Kohden distributor.

9. When the instrument is used with an electrosurgical instrument, pay careful attention to the application and/or

location of electrodes and/or transducers to avoid possible burn to the patient.

WARRANTY POLICY

Nihon Kohden Corporation (NKC) shall warrant its products against all defects in materials and workmanship for one year

from the date of delivery. However, consumable materials such as recording paper, ink, stylus and battery are excluded from

the warranty.

NKC or its authorized agents will repair or replace any products which prove to be defective during the warranty period,

provided these products are used as prescribed by the operating instructions given in the operator’s and service manuals.

No other party is authorized to make any warranty or assume liability for NKC’s products. NKC will not recognize any other

warranty, either implied or in writing. In addition, service, technical modification or any other product change performed by

someone other than NKC or its authorized agents without prior consent of NKC may be cause for voiding this warranty.

Defective products or parts must be returned to NKC or its authorized agents, along with an explanation of the failure.

Shipping costs must be pre-paid.

This warranty does not apply to products that have been modified, disassembled, reinstalled or repaired without Nihon

Kohden approval or which have been subjected to neglect or accident, damage due to accident, fire, lightning, vandalism,

water or other casualty, improper installation or application, or on which the original identification marks have been

removed.

In the USA and Canada other warranty policies may apply.

CAUTION

United States law restricts this device to sale by or on the order of a physician.

ii Service Manual TEC-7600/7700

EMC RELATED CAUTION

This equipment and/or system complies with the International Standard IEC 60601-1-2 for electromagnetic

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

exceeds the limits or levels stipulated in the IEC 60601-1-2, 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.

In IEC 60601-1-2 Medical Electronic Equipment, Part 1: General Requirements for Safety, 2. Collateral Standard:

Electromagnetic compatibility-Requirements and test. Section 36. 202. 2 Radiated radio-frequency electromagnetic

fields, PATIENT COUPLED EQUIPMENT and/or SYSTEMS applicable IMMUNITY test methods are under consideration

at SC62A/WG13. The 3 V/m IMMUNITY level may be inappropriate especially when measuring SpO

because

physiological signals can be much smaller than those induced by a 3 V/m electromagnetic field.

When measuring SpO

, various interference may produce false waveforms which look like pulse waveforms. SpO

value and pulse rate may be measured from these false waveforms, causing the alarm to function improperly.

When installing the monitor, avoid locations where the monitor may receive strong electromagnetic interference

such as radio or TV stations, cellular phone or mobile two-way radios.

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.

Service Manual TEC-7600/7700 iii

Conventions Used in this Manual and Instrument

Dangers, Warnings, Cautions and Notes

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

DANGER

A danger is used to alert the user to a hazardous situation which will cause death or serious injury.

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.

iv Service Manual TEC-7600/7700

Section 1 General

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

Models and Functions ...............................................................................................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

Maintenance Equipments and Tools ..........................................................................1.5

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

Defibrillator ...................................................................................................... 1.6

Non Invasive Blood pressure, NIBP (When optinal SG-761VC/VE/VK NIBP Unit

is installed)......................................................................................................1.8

Noninvasive Pacing (TEC-7631/7731 series only) ...........................................1.8

External Paddle (ND-782VC/VE/VK) ...............................................................1.8

Battery ............................................................................................................ 1.8

Clock Accuracy...............................................................................................1.9

Environment ....................................................................................................1.9

Electromagnetic Compatibility.........................................................................1.9

Safety ............................................................................................................. 1.9

Monitor ............................................................................................................1.9

ECG Amplifier ...............................................................................................1.10

Recorder ........................................................................................................ 1.10

Rhythm Recognition Detector ....................................................................... 1.10

Power Requirements ..................................................................................... 1.10

Dimensions and Weight ................................................................................. 1.11

Panel Description .............................................................................................................. 1.12

Front Panel .............................................................................................................. 1.12

Top Panel (TEC-7631/7731 Series Only) ................................................................. 1.13

External Paddles ..................................................................................................... 1.14

Left Side Panel ........................................................................................................ 1.14

Rear Panel .............................................................................................................. 1.15

Bottom Panel .......................................................................................................... 1.15

Composition ...................................................................................................................... 1.16

Standard Components ...................................................................................1.16

Options ......................................................................................................... 1.20

Service Manual TEC-7600/7700 1C.1

Board/Unit Location ........................................................................................................... 1.23

TEC-7600 Series Defibrillator .................................................................................. 1.23

TEC-7700 Series Defibrillator .................................................................................. 1.24

Block Diagram ................................................................................................................... 1.25

TEC-7600 Series Defibrillator .................................................................................. 1.25

TEC-7700 Series Defibrillator .................................................................................. 1.26

1C.2 Service Manual TEC-7600/7700

Introduction

1. GENERAL

This service manual provides useful information to qualified service personnel to

understand, troubleshoot, service, maintain and repair this TEC-7600 and TEC-7700

series defibrillator (referred to as “instrument” in this service manual).

CardioLife

Models and Functions

Defibrillation and synchronized cardioversion

3 lead ECG Standard Standard Standard Standard

External paddles Standard Standard Standard Standard

Internal paddles Option Option Option Option

Disposable pads Option Option Option Option

Pediatric electrode assy 44 mm dia. Option Option Option Option

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 needs to understand the operation of the instrument

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

Functions TEC-7621 TEC-7631 TEC-7721 TEC-7731

AED function Standard Standard Standard Standard

Noninvasive pacing

Not

available

Standard

Not

available

Standard

SpO2 measurement Option Option Option Option

CO2 measurement Option Option Option Option

Voice prompt Option Option Option Option

5 lead ECG Option Option Option Option

External ECG input Option Option Option Option

External ECG output Option Option Option Option

Memory card slot Standard Standard Standard Standard

NIBP measurement Option Option Option Option

12 lead ECG measurement Option Option Option Option

Transmitter Option Option Option Option

Service Manual TEC-7600/7700 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 waterproof, 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 for repair.

Environmental Safeguards

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

dispose of the lithium battery 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 alkyl diaminoethylglycine: 0.5%

1.2 Service Manual TEC-7600/7700

1. GENERAL

Caution - continued

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 a board or unit of the instrument, be sure to use a

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

board or unit 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 TEC-7600/7700 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.

Only 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

troubleshooting tables. Refer to “Troubleshooting“ 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 TEC-7600/7700

1. GENERAL

Patient Safety Checks

Maintenance Equipments and Tools

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 IEC

60601-1 “Medical electrical equipment - Part 1: General requirements for safety”:

• Protective earth resistance check

• Earth leakage current check

• Enclosure leakage current check

• Patient leakage current check

• Withstanding voltage check

Test equipment

When repairing or calibrating the instrument, the following test equipment is

required.

• Oscilloscope: 2 channels or more for input signal, 50 mV to 5 V input range, 1/

10 attenuating probe and 100 MHz or more frequency response characteristic

must be provided.

• Power supply

• Oscillator: standard type

• Digital voltmeter: standard type (An oscilloscope can be used instead of the

digital voltmeter.)

Service Manual TEC-7600/7700 1.5

1. GENERAL

Specifications

Defibrillator

TEC-7600 Series

Output energy (across 50 Ω) 2, 3, 5, 7, 10, 20, 30, 50, 70, 100, 150, 200, 300, and 360 J

Energy accuracy 2 J: ±0.5 J

3 J: ±1 J

5 to 10 J: ±2 J

20 to 360 J: ±10%

Output waveform Edmark, single phase pulse (across 50 Ω)

Charging time When powered by AC 100V to 240V:

to 360 J, maximum 5 s

to 200 J, maximum 3 s

When powered by 90% of the rated mains voltage:

to 360 J, maximum 5 s

When powered by a fully charged new battery at 20°C ambient temperature:

to 360 J, maximum 10 s

After 15 discharges at 360 J with a fully charged new battery at 20°C ambient

temperature: to 360J, maximum 10 s

Charging display Displays the charged energy value on the screen

Synchronized discharge Available

From the peak of R wave to the peak of discharge:

With paddle ECG: within 60 ms

With lead ECG or ECG from an external instrument: within 25 ms

Maximum continuous charge/discharge cycles at 360 J

60 cycles: 3 cycles per minute with 1 minute cool down period after every 1

minute charge/discharge period

15 cycles: 3 cycles per minute with no cool down period

Current (Amps)

81A

58A

Delivered energy= 360J

37A

0246810

1.6 Service Manual TEC-7600/7700

Time (ms)

TEC-7700 Seies

Output energy (across 50 Ω) 2, 3, 5, 7, 10, 15, 20, 30, 50, 70, 100, 150, 200 and 270 J

Energy accuracy 2 J: ±0.5 J

3 J: ±1 J

5 to 15 J: ±2 J

20 to 270 J: ±10%

Output waveform Biphasic, truncated exponential constant power (across 50 Ω)

Charging time When powered by AC 100V to 240V:

to 270 J, maximum 5 s

to 150 J, maximum 3 s

When powered by 90% of the rated mains voltage:

to 270 J, maximum 5 s

When powered by a fully charged new battery at 20°C ambient temperatur e:

to 270 J, maximum 10 s

After 15 discharges at 270 J with a fully charged new battery at 20°C ambient

temperature: to 270J, maximum 10 s

Charging display Displays the charged energy value on the screen

Synchronized discharge Available

From the peak of R wave to the peak of discharge: within 60 ms

Maximum continuous charge/discharge cycles at 270 J

60 cycles: 3 cycles per minute with 1 minute cool down period after every 1

minute charge/discharge period

15 cycles: 3 cycles per minute with no cool down period

1. GENERAL

First phase Second phaseLoad resistance

(Ω)

Ipk1 (A) D1 (ms) Ipk2 (A) D2[ms]

25 67.3 3.85 15.5 3.62 50 41.1 6.35 12.7 3.62

75 29.5 8.86 11.0 3.62 100 22.9 11.4 9.81 3.62 125 18.8 13.9 8.96 3.62 150 15.9 16.4 8.29 3.62 175 13.8 18.9 7.76 3.62

Service Manual TEC-7600/7700 1.7

1. GENERAL

Non Invasive Blood pressure, NIBP (When optinal SG-761VC/VE/VK NIBP Unit is installed)

Display parameters: Systolic pressure, mean pressure, diastolic pressure, cuff pressure

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

±4 mmHg (200 mmHg ≤ NIBP ≤ 300 mmHg)

Safety: Cuff inflation maximum pressure: Adult 300 to 330 mmHg

Neonate 150 to 165 mmHg

Cuff inflation time limiter: Adult ≤ 180 s

Neonates ≤ 90 s

When sudden power loss occurs, automatic rapid deflation is perofrmed.

Measurement mode: Manual

STAT (continuous)

Automatic (periodic)

Alarm: Adult

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

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

Neonate

Upper limit range: 10 to 125 mmHg in 5 mmHg steps, OFF

Lower limit range: OFF, 5 to 120 mmHg in 5 mmHg steps

Noninvasive Pacing (TEC-7631/7731 series only)

Pacing rate 40 to 180 pulse/min in 10 pulse/min steps

Output current 8 to 200 mA in 1 mA steps

Pacing modes Fixed and Demand Maximum load resistance Outputs 200 mA across 250 Ω, 120 mA across 500 Ω

External Paddle (ND-782VC/VE/VK)

Paddle electrode size For adults: 70 ±3 × 106 ±3 (mm2)

For children: 45 ±3 × 53 ±3 (mm2)

Paddle cord length 2.0 m or more (When it is pulled by 18 N force.)

Battery

Type Ni-MH battery

Nominal voltage: 12 V

Rated capacity: 2800 mAh

Capacity

TEC-7621/7631 series: With fully charged new battery at 20°C ambient temperature

- Minimum 70 discharges at 360 J

- Minimum 150 minutes continuous monitoring

- Minimum 90 minutes fixed mode pacing (180 pulse/min, 200 mA)

With the fully charged new battery at 0°C, the defibrillator can perform:

- Minimum 50 discharges at 360 J

TEC-7721/7731 series: With fully charged new battery at 20°C ambient temperature

- Minimum 100 discharges at 270 J

- Minimum 150 minutes continuous monitoring

- Minimum 90 minutes fixed mode pacing (180 pulse/min, 200 mA)

With the fully charged new battery at 0°C, the defibrillator can perform:

- Minimum 50 discharges at 270 J

1.8 Service Manual TEC-7600/7700

Clock Accuracy

At surrounding temeprature 25°C (77°F): ±3 min/month

At storage temperatures –20 to 70°C (–4 to 158°F): ±5 min/month

Environment

Operating temperature: 0 to 45°C (32 to 113°F)

Operating humidity: 0 to 40°C: 30 to 95% (relative humidity, non-condensing)

40 to 45°C: 30 to 80% (relative humidity, non-condensing)

Operating atmospheric pressure: 70 to 106 kPa

Storage temperature: –20 to 70°C (–4 to 158°F)

Storage humidity: 10 to 95% (relative humidity, non-condensing)

Storage atmospheric pressure: 50 to 106 kPa

Electromagnetic Compatibility

IEC 60601-1-2:1993

IEC 61000-3-2:1995

Emissions: CISPR11 Group1,Class B

1. GENERAL

Safety

Safety standard IEC 60601-1:1988

IEC 60601-1 Amendment 1:1991

IEC 60601-1 Amendment 2:1995

IEC 60601-2-4:1983

IEC 60601-2-30:1995

According to the type of protection against electrical shock

Battery power: INTERNALLY POWERED EQUIPMENT

AC power: CLASS I EQUIPMENT

According to the degree of protection against electrical shock

DEFIBRILLATION-PROOF TYPE BF APPLIED PART:

External paddles, disposable pads, SpO2 adapter and CO2 sensor kit, NIBP cuff

DEFIBRILLATION-PROOF TYPE CF APPLIED PART:

Internal paddles, ECG connection cable

According to the degree of protection against harmful ingress of water: IPX1

According to the degree of safety of applicationin the presence of a 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

Mode of operation

Continuous operation with intermittent load: Operation at defibrillation mode

Continuous operation: All operation except above mentioned

Monitor

Effective display area 115.2(W) × 86.4(H) mm (5.7 inch)

Sweep length 97 mm

Sweep speed 25 mm/s, 50 mm/s Sensitivity 10 mm/1mV ±5% (sensitivity × 1)

Amplitude limit 40 mm

Service Manual TEC-7600/7700 1.9

1. GENERAL

ECG Amplifier

Input signal PADDLE, I, II, III, aVR, aVL, aVF, V, AUX

Frequency response Through paddles: 0.5 to 20 Hz (–3 dB)

Through ECG connection cable: 0.05 to 80 Hz (–3 dB)

AUX: 0.05 to 80 Hz (–3 dB)

Input impedance Through paddles: ≥100 kΩ

Through ECG connection cable: ≥5 MΩ (at 10 Hz 1mV) AUX: ≥ 100 kΩ ±10%

CMRR ≥100 dB (against chassis ground) when AC filter is On

AC filter Available (common with 50/60 Hz)

ON at ≥-20 dB, OFF

Pacing pulse rejection ON, OFF External ECG input sensitivity 10 mm/V ± 5% (sensitivity × 1)

Heart rate counting range Defibrillation or monitoring mode: 15 to 300 bpm

Pacing mode: 15 to 220 bpm

Recorder

Paper speed Real time/delayed ECG waveform recording: 50, 25, 5 mm/s

Types of recording Manual recording:

real time/delayed waveform recording, report recording, event recording

Automatic recording:

record on charging after discharge, alarm recording, periodic recording

Rhythm Recognition Detector

We evaluated the rhythm recognition detector of the TEC-7600/7700 series defibrillator using the official

electrocardiogram database provided by AHA (American Heart Association) and MIT (Massachusetts Institute of

Technology) and an electrocardiogram database of over 3000 electrocardiograms from hospitals in Japan. According

to our own evaluation, the rhythm recognition detector of the TEC-7600/7700 series defibrillator meets the

equivalent of AAMI standards ANSI/AAMI DF-39-1993 3.3.18.

Power Requirements

Line voltage: 100 to 240 V

Line frequency: 50/60 Hz (automatic switching)

Power input: Intermittent load: 450 VA or less

Continuous load: 200 VA or less

DC (Battery)

Power voltage: 12V

Power consumption Intermittent load: 14 A or less

Continuous load: 4.2 A or less

Charging time: 3 hours or less (with AC, with the power OFF)

1.10 Service Manual TEC-7600/7700

Dimensions and Weight

Dimensions 336W × 242H ×377 D mm

Weight

TEC-7621 series defibrillator:

7.8 kg (External paddles use, AC unit w/o battery)

6.9 kg (Pad adaptor use, AC unit w/o battery)

TEC-7631 series defibrillator:

8.1 kg (External paddles use, AC unit w/o battery)

7.2 kg (Pad adaptor use, AC unit w/o battery)

TEC-7721 series defibrillator:

8.1 kg (External paddles use, AC unit w/o battery)

7.2 kg (Pad adaptor use, AC unit w/o battery)

TEC-7731 series defibrillator:

8.4 kg (External paddles use, AC unit w/o battery)

7.5 kg (Pad adaptor use, AC unit w/o battery)

1. GENERAL

Service Manual TEC-7600/7700 1.11

1. GENERAL

Panel Description

Front Panel

TEC-7600 Series

TEC-7700 Series

CardioLife

PACING

DISARM

DEMAND

FIXED

AED

SETUP

MONITOR

OFF

SYNC

CHARGE

AED

DISARM

AED

MONITOR

OFF

SYNC

FIXED

SETUP

CHARGE

AED

PACING

DEMAND

DISCHARGE

CardioLife

PACING

DISARMS

DEMAND

FIXED

AED

SETUP

MONITOR

OFF

SYNC

CHARGE

AED

DISARMS

AED

MONITOR

OFF

SYNC

FIXED

SETUP

CHARGE

AED

PACING

DEMAND

DISCHARGE

Name

1. Energy/Mode Select control

2. SYNC button

3. SYNC lamp

4. CHARGE/AED button

5. CHARGE button

6. DISCHARGE button

7. Screen

8. ECG input connector

9. SpO2/CO2 connector (on the optional QI-762V DSI Interface Unit)

10. Paddle connector

1.12 Service Manual TEC-7600/7700

1. GENERAL

15 16

Name

11. Record key

12. Recording lamp

13. Event key

14. Event lamp

15. ECG lead key

16. ECG sensitivity key

17. SILENCE ALARM key

18. Alarm setting key

19. AC lamp

20. Battery charging lamp

21. Battery charge complete lamp

20 191811

Top Panel (TEC-7631/7731 Series Only)

PACING RATE(ppm)

PACING

PACING OUTPUT(mA)

Name

1. PACING RATE control

2. PACING OUTPUT control

3. PACING lamp

4. START/STOP key

5. START/STOP lamp

6. PULSE lamp

PULSE

START

STOP

Service Manual TEC-7600/7700 1.13

1. GENERAL

External Paddles

14432

Name

1. CONTACT lamp

2. CHARGE button

3. CHARGE lamp

4. DISCHARGE buttons

Left Side Panel

Name

1. Recording paper exit

2. Door release lever

3. Card slot

4. Card eject button

1.14 Service Manual TEC-7600/7700

Rear Panel

1. GENERAL

Name

1. AC SOURCE socket

2. Equipotential ground terminal

3. Optional unit connector

Bottom Panel

Battery pack holder

Service Manual TEC-7600/7700 1.15

1. GENERAL

Composition

Standard Components

TEC-7621C

TEC-7621E

TEC-7621K

CY-0006 Upper casing assy for E/K version

CY-0014 Upper casing assy for C version

UR-0249 Main key board

UR-0251 Test load board

CY-0007 Lower casing assy

CY-0008 LCD assy

CY-0009 PRE assy

HV-761V Relay unit

UR-0121 HV drive board

UR-0247 Main board

UR-0250 Key board

UR-0262 AC/DC unit

WS-761V Recorder unit

WS-751X Recorder

ND-782VC External paddle for C version

ND-782VE External paddle for E version

ND-782VK External paddle for K version

ND-611V Adult plate assy

ND-782X External paddle assy

1.16 Service Manual TEC-7600/7700

1. GENERAL

TEC-7631C

TEC-7631E

TEC-7631K

CY-0006 Upper casing assy for E/K version

CY-0014 Upper casing assy for C version

UR-0249 Main key board

UR-0251 Test load board

CY-0007 Lower casing assy

CY-0008 LCD assy

CY-0009 PRE assy

HV-761V Relay unit

UR-0121 HV drive board

UR-0247 Main board

UR-0253 Pacer board

UR-0250 Key board

UR-0262 AC/DC unit

WS-761V Recorder unit

WS-751X Recorder

ND-782VC External paddle for C version

ND-782VE External paddle for E version

ND-782VK External paddle for K version

ND-611V Adult plate assy

ND-782X External paddle assy

Service Manual TEC-7600/7700 1.17

1. GENERAL

TEC-7721E

TEC-7721K

CY-0011 Upper casing assy

UR-0249 Main key board

UR-0251 Test load board

CY-0012 Lower casing assy

CY-0008 LCD assy

CY-0009 PRE assy

HV-771V Biphasic HV unit

UR-0248 T-HV drive board

UR-02471 Main board

UR-0250 Key board

UR-0262 AC/DC unit

WS-761V Recorder unit

WS-751X Recorder

ND-782VE External paddle for E version

ND-782VK External paddle for K version

ND-611V Adult plate assy

ND-782X External paddle assy

1.18 Service Manual TEC-7600/7700

1. GENERAL

TEC-7731E

TEC-7731K

CY-0011 Upper casing assy

UR-0249 Main key board

UR-0251 Test load board

CY-0012 Lower cassing assy

CY-0008 LCD assy

CY-0009 PRE assy

HV-771V Biphasic HV unit

UR-0248 T-HV drive board

UR-02471 Main board

UR-0253 Pacer board

UR-0250 Key board

UR-0262 AC/DC unit

WS-761V Recorder unit

WS-751X Recorder

ND-782VE External paddle for E version

ND-782VK External paddle for K version

ND-611V Adult plate assy

ND-782X External paddel assy

Service Manual TEC-7600/7700 1.19

1. GENERAL

Options

JC-761V External ECG cable

JC-762V Connection cable

JC-763V Connection cable

ND-612V Pediatric electrode, 44 mm φ

ND-762V Internal paddle electrode, 25 mm φ

ND-763V Internal paddle electrode, 35 mm φ

ND-764V Internal paddle electrode, 45 mm φ

ND-765V Internal paddle electrode, 55 mm φ

ND-766V Internal paddle electrode, 65 mm φ

ND-767V Internal paddle electrode, 75 mm φ

BC-763V ECG connection cable (IEC, 3 leads)

BC-763VA ECG connection cable (AHA, 3 leads)

BC-765V ECG connection cable (IEC, 5 leads)

BC-765VA ECG connection cable (AHA, 5 leads)

JC-755V Pad adapter

JC-765V Pad adapter

KD-022A Cart

DI-001A Cart tray assembly

YZ-024H9 Battery pack, NKB-301V

YZ-025H0 Paste holder kiy

1.20 Service Manual TEC-7600/7700

YZ-024H3 TEC Accessory set (100V/IEC)

YZ-024H4 TEC Accessory set (200V/IEC)

YZ-024H5 TEC Accessory set (100V/AHA)

YZ-024H6 TEC Accessory set (200V/AHA)

BC-763V ECG connection cable (IEC, 3 leads) for YZ-04H3/YZ-024H4

BC-763VA ECG connection cable (AHA, 3 leads) for YZ-04H5/YZ-024H6

AC-761VA 12 lead ECG unit for K version (AHA)

AC-761VC 12 lead ECG unit for C version

AC-761VE 12 lead ECG unit for E version

AC-761VK 12 lead ECG unit for K version (IEC)

1. GENERAL

UR-0255 ECG 12L board for AC-761VA/VK

UR-02551 ECG 12L board for AC-761VC

UR-02552 ECG 12L board for AC-761VE

UR-0256 ECG-COM board for AC-761VA/VE/VK

UR-02561 ECG-COM board for AC-761VC

BJ-761VA Patient cable for AC-761VA

BJ-761VK Patient cable for AC-761VC/VE/VK

BR-906VA Electrode lead for AC-761VA

BR-906V Electrode lead for AC-761VC/VE/VK

QI-761V ZB interface unit

UR-0259 ZR-ZB COM board

QI-762V DSI Interface unit

UR-0254 DSI Float board

QI-763V DSI/AUX OUT Interface unit

UR-0272 AUX OUT board

Service Manual TEC-7600/7700 1.21

1. GENERAL

SG-761VC NIBP unit for C version

SG-761VE NIBP unit for E version

SG-761VK NIBP unit for K version

UR-0257 NIBP board

VP-761V Voice prompt unit for K version

VP-761VC Voice prompt unit for C version

VP-761VE Voice prompt unit for E version

UR-0258 Voice prompt board for K version

UR-0290 Voice prompt board for C version

UR-0291 Voice prompt board for E version

1.22 Service Manual TEC-7600/7700

Board/Unit Location

TEC-7600 Series Defibrillator

1. GENERAL

AC/DC unit

Pacer board (TEC-7631 series only)

LCD unit

Key board

Recorder unit

Test load board

Relay unit

HV coil

HV capacitor

Main key board

Paddle connector

Service Manual TEC-7600/7700 1.23

Main board

1. GENERAL

TEC-7700 Series Defibrillator

AC/DC unit

Pacer board (TEC-7731 series only)

LCD unit

Key board

Recorder unit

Test load board

Biphasic HV unit

HV capacitor

Main key board

Paddle connector

1.24 Service Manual TEC-7600/7700

Main board

Block Diagram

TEC-7600 Series Defibrillator

1. GENERAL

Service Manual TEC-7600/7700 1.25

1. GENERAL

TEC-7700 Series Defibrillator

1.26 Service Manual TEC-7600/7700

Section 2 Troubleshooting

How to Troubleshoot ............................................................................................................ 2.1

Error Code ...........................................................................................................................2.2

Defibrillation .............................................................................................................. 2.3

Operation Panel.........................................................................................................2.5

Communication ......................................................................................................... 2.6

Data Error..................................................................................................................2.7

Pacing (TEC-7631/7731 Series Only) ........................................................................2.7

12 Lead ECG Measurement ......................................................................................2.8

Message..............................................................................................................................2.9

Instrument and SpO2/CO2 Measurement .................................................................... 2.9

NIBP Measurement .................................................................................................2.11

12 Lead ECG Measurement .................................................................................... 2.11

Troubleshooting ................................................................................................................. 2.12

General .................................................................................................................... 2.12

Defibrillation ............................................................................................................ 2.13

Monitoring ............................................................................................................... 2.14

Recording ................................................................................................................2.18

Battery .................................................................................................................... 2.18

Pacing (TEC-7631/7731 Series Only) ...................................................................... 2.19

Service Manual TEC-7600/7700 2C.1

This page is intentionally left blank.

2C.2 Service Manual TEC-7600/7700

How to Troubleshoot

2. TROUBLESHOOTING

Use this section to locate, identify and solve a problem in the instrument or an error

message displayed on the screen. The troubleshooting tables in this section are

divided into general problems and displayed error messages.

1. Determine which troubleshooting table to use. Also refer to “Messages and

Troubleshooting” in Section 10 of the Operator’s manual.

2. In the “Error Code”, “Message” or “Problem” column, find the trouble item

that matches the problem or error message.

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

recommended in the “Action” column).

4. If the problem or error message is not solved, do the next action recommended

in the “Action” column. (If this does not solve the problem, do the next

recommended sections.)

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

distributor or representative.

NOTE

Before contacting your NK distributor or representative for technical

support, please complete a copy of the Maintenance Check Sheet (the

original copy is provided at the end of the Section 4 “Maintenance”),

and if possible, provide additional detailed information on the problem.

Send the complete copy of the Maintenance Check Sheet to your NK

distributor or representative. This will allow your NK distributor or

representative to provide you with the best support.

Service Manual TEC-7600/7700 2.1

2. TROUBLESHOOTING

Error Code

The instrument displays an error code if it detects an error when the power is

turned on and during operation.

NOTE

• For problems that are not reproducible, call up the System Setup

screen and print the REPORT HISTORY. Refer to the Operator's

Manual for the detail of this procedure. The error code will be lost

when the power is turned off.

• Always check all the cable connections in the instrument before

performing the action recommended in the troubleshooting tables in

this section. This is because a loose cable connection can cause the

instrument to display the error code.

An error code is displayed. ERROR AXXX ERROR CXXX ERROR DXXX ERROR KXXX ERROR PXXX ERROR TXXX

Turn off the instrument, then turn on the instrument and do the same operation.

Is the error code dislayed?

Ye s Ye s

The error code is saved in the "Report History"?

Error AXXX, CXXX, DXXX, KXXX and TXXX: Perform charge/discharge test. Error PXXX Perform pacing test.

Is the error code displayeed?

Refer to error code description for detail

2.2 Service Manual TEC-7600/7700

Ye s

Instrument is normal. But find the cause of the error code.

2. TROUBLESHOOTING

Defibrillation

TEC-7621/7631 series

Error Code Meaning Possible Cause Action

A501

A512

A513

A524

A527

A529

A556

A566

A585

A587

During standby mode, the HV capacitor

has more than 1 J energy more than one

continuous second.

When charging is started, the HV

capacitor energy did not reach 1 J

within 2 seconds.

The energy is not reached to the

selected energy within the specified

time.

After charging, the capacitor energy

falls the specified value for each

energy.

After charging, the capacitor energy is

about 15% above the selected energy.

After charging, the actual charged

energy is different from the selected

energy.

Internal discharge takes more than 20

seconds to complete.

HV capacitor's voltage did not reach its

target value 20 seconds after adjusted

internal discharge.

The voltage of the HV capacitor

exceeds its specified voltage.

When the disposable pad is used,

12.5% or more of the charged energy

remains in the HV capacitor 2 seconds

after external discharge.

Faulty relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty main board.

Faulty HV capacitor.

Faulty relay unit.

Faulty main board.

Faulty relay unit.

Faulty main board.

Faulty relay unit.

Faulty main board.

Discharge HV capacitor and

replace the relay unit.

Replace the relay unit.

Replace the HV capacitor

Replace the relay unit.

Replace the HV capacitor.

Replace the relay unit.

Replace the HV capacitor

Replace the relay unit.

Replace the main board.

Replace the HV capacitor.

Replace the relay unit.

Replace the main board.

Replace the relay unit.

Replace the main board.

Replace the relay unit.

Replace the main board.

Service Manual TEC-7600/7700 2.3

2. TROUBLESHOOTING

TEC-7721/7731 series

Error Code Meaning Possible Cause Action

A501

A512

A513

A524

A527

A529

A551

A552

A556

A566

A581

A582

A583

A584

A585

A587

A597

During standby mode, the HV capacitor

has more than 1 J energy more than one

continuous second.

When charging is started, the HV

capacitor energy did not reach 1 J

within 2 seconds.

The energy is not reached to the

selected energy within the specified

time.

After charging, the capacitor energy

falls the specified value for each

energy.

After charging, the capacitor energy is

about 15% above the selected energy.

After charging, the actual charged

energy is different from the selected

energy.

AnIGBToftheswitch1onthe

biphasic HV unit does not operate.

Two or more IGBTs of the switch 1 on

the biphasic HV unit does not operate.

Internal discharge takes more than 20

seconds to complete.

HV capacitor's voltage did not reach its

target value 20 seconds after adjusted

internal discharge.

AnIGBToftheswitch2onthe

biphasic HV unit does not operate.

Two or more IGBTs of the switch 2 on

the biphasic HV unit does not operate.

AnIGBToftheswitch3onthe

biphasic HV unit does not operate.

Two or more IGBTs of the switch 3 on

the biphasic HV unit does not operate.

The voltage of the HV capacitor

exceeds its specified voltage.

When the disposable pad is used,

12.5% or more of the charged energy

remains in the HV capacitor 2 seconds

after external discharge.

When discharging, the second phase

pulse is not output.

Faulty biphasic HV unit.

Faulty HV capacitor.

Faulty biphasic HV unit.

Faulty HV capacitor.

Faulty biphasic HV unit.

Faulty HV capacitor.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Faulty biphasic HV unit.

Faulty main board.

Discharge HV capacitor and

replace the biphasic HV unit.

Replace the biphasic HV unit.

Replace the HV capacitor.

Replace the biphasic HV unit.

Replace the HV capacitor.

Replace the biphasic HV unit.

Replace the HV capacitor.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

ReplacethebiphasicHVunit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

Replace the biphasic HV unit.

Replace the main board.

2.4 Service Manual TEC-7600/7700

2. TROUBLESHOOTING

Operation Panel

• When the power is power is on, the following key switch is pressed

and held for more than 10 seconds, the error code of each key is

displayed.

• If the key was not pressed and held, check each key function with the

System Maintenance screen. Refer to Section 4 “System Maintenance

Screen - Check Hardware Screen - Check Key Screen”.

Error Code Meaning Possible Cause Action

K501

K502

K503

K504

K505

K506

K515

The ECG lead key error is detected. Faulty key board.

Faulty main board.

The ECG sensitivity key error is

detected.

The ECG silence alarm key error is

detected.

The alarm setting key error is detected. Faulty key board.

The record key error is detected. Faulty key board.

The event key error is detected. Faulty key board.

The SYSNC button error (front panel) is

detected.

The CHARGE button error (front panel)

is detected.

The right DISCHARGE button error

(front panel) is detected.

The left DISCHARGE button error

(front panel) is detected.

The CHARGE button error (apex

external paddle) is detected.

The DISCHARGE button error (apex

external paddle) is detected.

The DISCHARGE button error

(sternum external paddle) is detected.

When the NIBP unit is connected, the

NIBP START/STOP key error is

detected.

The PACING START/STOP key error

is detected.

Faulty key board.

Faulty main board.

Faulty key board.

Faulty main board.

Faulty main key board.

Faulty main board.

Faulty main key board.

Faulty main board.

Faulty main key board.

Faulty main board.

Faulty main key board.

Faulty main board.

Faulty external paddles.

Faulty main board.

Faulty external paddles.

Faulty main board.

Faulty external paddles.

Faulty main board.

Faulty NIBP unit.

Faulty pacer board.

Faulty main board.

NOTE

Replace the key board.

Replace the main board.

Replace the key board.

Replace the main board.

Replace the key board.

Replace the main board.

Replace the key board.

Replace the main board.

Replace the key board.

Replace the main board.

Replace the key board.

Replace the main board.

Replace the main key board.K507

Replace the main board.

Replace the main key board.K508

Replace the main board.

Replace the main key board.K509

Replace the main board.

Replace the main key board.K510

Replace the main board.

Replace the external paddles.K511

Replace the main board.

Replace the external paddles.K512

Replace the main board.

Replace the external paddles.K513

Replace the main board.

Replace the NIBP unit.

Replace the pacer board.K516

Replace the main board.

Service Manual TEC-7600/7700 2.5

2. TROUBLESHOOTING

Communication

Error Code Meaning Possible Cause Action

C501

C502

C504

C505

C507

C508

C511

When the CO2sensor kit is connected,

CO2data is not received.

When the SpO2adapter is connected,

SpO2data is not received.

When the NIBP unit is connected, the

communication between the NIBP unit

and sub-CPU is not performed correctly.

When the ZB interface unit and

transmitter are connected, the

communication between the transmitter

and main-CPU is not performed

correctly.

The battery CPU does not transfer the

battery data to the main CPU for more

than 10 seconds.

When the power is turned on, the

communication error between the RTC

(real time clock) and main CPU is

detected for one second.

When the 12 lead ECG unit is

connected, the communication between

the 12 lead ECG unit and main-CPU is

not performed correctly.

The sub CPU does not update the data

in the DPRAM for one second.

Faulty CO2sensor kit.

Faulty DSI interface board.

Faulty DSI/AUX OUT

interface board.

Faulty main board.

Faulty SpO2adapter.

Faulty DSI interface board.

Faulty DSI/AUX OUT

interface board.

Faulty main board.

Faulty NIBP unit.

Faulty main board.

Faulty ZB interface unit.

Faulty transmitter.

Faulty main board.

Faulty ECG 12L board.

Faulty ECG-COM board.

Faulty main board.

Replace the

interface board.

Replace the main board.

Replace the Sp

Replace the

interface board.

Replace the main board.

Replace the NIBP unit.C503

Replace the main board.

Replace the ZB interface unit.

Replace the transmitter.

Replace the main board.

Replace the ECG 12L board.

Replace the ECG-COM board.

Replace the main board.

CO2sensor kit.

DSI interface board.

DSI/AUX OUT

DSI interface board.

DSI/AUX OUT

O2adapter.

2.6 Service Manual TEC-7600/7700

2. TROUBLESHOOTING

Data Error

Error Code Meaning Possible Cause Action

D501

D511

D512

Data in the DRAM or flash memory is

not read out correctly (summation

error).

When the power is turned on, settings in

the System Maintenance screen do not

match the backup data in the flash

memory.

When the power is turned on, damaged

waveform report data in the flash

memory is detected.

Faulty DRAM or flash

memory.

After settings in the System

Maintenance screen are

changed, the “Flash Save”

procedure is not performed.

During power off sequence,

power down occurs.

Faulty main board.

During power off sequence,

power down occurs.

Faulty main board.

Replace the main board.

Perform the “Flash Save”

procedure in the System

Maintenance screen.

Delete the report data in the

System Setup screen.

Replace the main board.

Delete the report data in the

System Setup screen.

Replace the main board.

Pacing (TEC-7631/7731 Series Only)

Error Code Meaning Possible Cause Action

P501 Pacing output rate does not match the

selected rate.

P502 Pulse width of the pacing output pulse is

larger or smaller than the selected width.

P503 Current intensity of the pacing output

pulse is larger than the selected value.

P504 Current intensity of the pacing output

pulse is smaller than the selected value.

P505 Pacing output that is not requested by the

CPU is detected.

P506 Pacing output voltage exceeds the upper

limit.

P507 Reference voltage exceeds the specified

value.

P511 Error was detected in the short-mode of

the transistor.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Faulty main board. Replace the main board.

Faulty pacer board.

Replace the pacer board.

Service Manual TEC-7600/7700 2.7

2. TROUBLESHOOTING

12 Lead ECG Measurement

Error Code Meaning Possible Cause Action

T501 Serial communication error between

the input CPU and host CPU on the

ECG 12L board.

T502 Command communication error

between the input CPU and host CPU

on the ECG 12L board.

T503 Data from the input CPU on the ECG

12L board is out of range.

T507 Timer error of the host CPU on the

ECG 12L board.

T511 Bus error of the host CPU on the ECG

12L board.

T512 Address error of the host CPU on the

ECG 12L board.

T513 Invalid command error of the host CPU

on the ECG 12L board.

T514 Division error of the host CPU on the

ECG 12L board.

T516 Check sum error of the EEPROM on

the ECG 12L board.

T517 Writeerroroftheflashmemoryonthe

ECG 12L board.

T522 Time out of the 12 lead ECG analysis. Faulty ECG 12L board.

T523 The sensitivity and time constant data

differ between the EEPROM and flash

memory on the ECG 12L board.

Faulty ECG 12L board.

The power is turned off

during shutdown.

Faulty ECG 12L board.

Replace the ECG 12L board.

Turn the power off after the

system shutdowns correctly.

Replace the ECG 12L board.

Turn the power off, then retry the

12 lead ECG analysis. If the error

code appears again, replace the

ECG 12L board.

Replace the ECG 12L board.

2.8 Service Manual TEC-7600/7700

2. TROUBLESHOOTING

Message

Instrument and SpO2/CO2 Measurement

Message Meaning Possible Cause Action

Battery charge

timed out

Battery charging

error

Battery discharge

timed out

Capacitor test fail

CO2module not

working

CO2module

disconnected

ERROR AXXX

ERROR CXXX

ERROR DXXX

ERROR KXXX

ERROR PXXX

ERROR TXXX

FET error

High voltage

monitor error

During battery test

The battery was not fully

charged 5 hours after battery

charging started.

During battery test

An error occurred in battery

charging

During battery test

The voltage did not decrease to

the specified level 4 hours after

battery discharging started.

Capacitor test failed. Faulty HV capacitor.

CO2module is faulty.

CO2cable is disconnected from

the instrument.

Faulty HV

Communication error

Faulty ROM/RAM

Faulty keys

Faulty pacing unit

Faulty 12 lead ECG unit

The circuit to measure remaining

battery charge is faulty.

Faulty high voltage monitor circuit. Faulty relay unit, biphasic HV unit

Faulty battery pack.

Faulty main board.

Faulty battery pack.

Faulty main board.

Faulty battery pack.

Faulty main board.

Faulty CO2sensor kit.

Faulty the QI-762V DSI

Interface Unit or QI-763V

DSI/AUX OUT Interface Unit.

CO2cable is disconnected from

the QI-762V DSI Interface Unit

or QI-763V DSI/AUX OUT

Interface Unit.

Faulty DSI interface unit or

DSI/AUX OUT interface unit

—

Faulty main board.

or main board.

Replace the battery pack.

Replace the main board.

Replace the battery pack.

Replace the main board.

Replace the battery pack.

Replace the main board.

Replace the HV capacitor.

Replace the

Replace the DSI Interface Unit

or DSI/AUX OUT Interface

Unit.

Press the Silence alarm key to

turn off the message. If the

message still appears, the

interface unit or DSI/AUX

interface unit is faulty. Replace

the DSI interface unit or

DSI/AUX interface unit.

Turn off the instrument, then turn

on and do the same operation. If the

message still appears, refer to the

table for each error code.

Replace the main board.

Turn off the instrument, then turn

on and do the same operation. If the

message still appears, the relay unit,

biphasic HV unit or main board is

faulty. Replace the relay unit,

biphasic HV unit or main board.

CO2sensor kit.

DSI

Service Manual TEC-7600/7700 2.9

2. TROUBLESHOOTING

Message Meaning Possible Cause Action

Overheating The high voltage charge circuit

heats up.

Power abnormality Input power voltage is too high. Not specified battery is used. Only use the NKB-301V battery.

Relay drive error Faulty relay drive circuit

Replace battery Battery test result is 0 to 49%.

The

working

SpO2 module

disconnected

instrument

battery should be replaced with a

new one.

SpO2 module is faulty.

SpO2 cable is disconnected from

the instrument.

judged that the

The

instrument

frequently

Faulty relay unit, biphasic HV unit

or main board.

Faulty relay unit or biphasic HV

unit.

Faulty main board. Replace main board.

Faulty battery pack. Replace the battery.

Faulty the SpO2 adapter. Replace the SpO2 adapter.SpO2 module not

Faulty the QI-762V DSI

Interface Unit or QI-763V

DSI/AUX OUT Interface Unit.

SpO2 cable is disconnected from

the QI-762V DSI Interface Unit

or QI-763V DSI/AUX OUT

Interface Unit.

Faulty DSI interface unit or

DSI/AUX OUT interface unit.

discharged too

Turn off the instrument and leave

the instrument for 10 minutes, then

turn on.

Turn off the instrument and leave

the instrument for 10 minutes, then

turn on. If the message appears, the

relay unit, biphasic HV unit or

main board is faulty. Replace the

relay unit, biphasic HV unit or

main board.

Replace the relay unit or biphasic

HV unit.

Replace the DSI Interface Unit

or DSI/AUX OUT Interface

Unit.

Press the Silence alarm key to

turn off the message. If the

message still appears, the

interface unit or DSI/AUX

interface unit is faulty. Replace

the DSI interface unit or

DSI/AUX interface unit.

DSI

2.10 Service Manual TEC-7600/7700

NIBP Measurement

Message Possible Cause Action

NIBP air hose disconnected

NIBP air leak

NIBP cuff occlusion The cuff pressure does not decrease

Cuff pressure abnormal Excessive pressure was applied by the

NIBP module not working

NIBP measurement time out The measuring time exceeded the

The air hose is disconnected from the NIBP socket.

The air hose is damaged. Replace the air hose with a new one.

Faulty NIBP unit. Replace the NIBP unit.

The cuff pressure does not change after inflation even after a certain period of time.

The cuff or air hose is damaged. Replace the cuff or air hose with a new

Faulty NIBP unit. Replace the NIBP unit.

after measurement has completed. Faulty NIBP unit. Replace the NIBP unit.

cuff. Faulty NIBP unit. Replace the NIBP unit.

Faulty NIBP unit. Replace the NIBP unit.

specified time due to arrhythmia or noise. Faulty NIBP unit. Replace the NIBP unit.

2. TROUBLESHOOTING

Connect the air hose properly. When NIBP monitoring is not necessary, press the SILENCE ALARM key to silence the alarm. The NIBP display can be cleared.

Connect the cuff to the air hose properly. Connect the air hose to the socket properly.

one.

Check that the air hose is not bent or squeezed.

When measuring an adult, ask the patient not to move too much.

If the cause is arrhythmia, measure by invasive blood pressure measurement. Removethecauseifduetonoise.

12 Lead ECG Measurement

Message Possible cause Action

Check XX electrode The displayed is detached. (XX:

electrode name) Faulty electrode lead or patient cable. Replace the electrode lead or patient

Check chest electrode Two or more chest electrodes are

detached. Faulty electrode lead or patient cable. Replace the electrode lead or patient

A 5 lead electrode is used. Use the specified electrode lead and

Check limb electrode Two or more limb electrodes from the

R(RA), L(LA) or F(LL) electrode are detached. The RF electrode is detached. No electrode is attached to the patient. Faulty electrode lead or patient cable. Replace the electrode lead or patient

A 3 lead electrode is used. Use the specified electrode lead and

Not enough free memory There is no space to save new ECG

data file in the memory card.

Insert memory card A memory card is not inserted. Insert the memory card into the

Check memory card An unspecified memory card is

inserted. Faulty memory card. Replace the memory card.

Check the electrode attachment of the indicated position.

cable. Check the chest electrode attachment.

cable.

patient cable. Check the limb electrode attachment.

cable.

patient cable. Replace the memory card with a new one.

memory card slot. Insert the specified memory card.

Service Manual TEC-7600/7700 2.11

2. TROUBLESHOOTING

Troubleshooting

General

Problem Possible Cause Action

The instrument heats up. The instrument is used for many hours. There is no abnormality in the

instrument. Turn the Energy/Mode

select control to OFF position and

disconnect the power cord.

No operation when the instrument is

turned on.

characters are not seen.

The printed data is JAN/01/80.

The report data are not saved. On the Setup screen, the report data

The power cord is disconnected.

The battery is not installed. Install the specified battery.

Faulty battery

Remaining battery charge is low. Charge the battery.

Faulty main key board. Replace the main key board.

Faulty main board. Replace the main board.

Faulty AC/DC unit. Replace the AC/DC unit.

Faulty LCD inverter board. Replace the LCD inverter board.Screen is dim. Waveform and

Faulty LCD unit. Replace the LCD unit.

Faulty main board. Replace the main board.

The backup battery is almost

discharged.

were deleted.

Firmly connect the power cord to the

AC outlet and the defibrillator.

Replace the battery with a new one

(NKB-301V).

Replace the main board. (Under normal

use condition, the backup battery

lifetime is about 6 years.)

Deleted data cannot be recovered.

When the power is tuned off, the AC

power cord is disconnected while the

"Shutdown" message is displayed.

Faulty main board. Replace the main board.

All settings set in the Setup screen and

System Setup screen return to the

default settings.

2.12 Service Manual TEC-7600/7700

When the power is tuned off, the AC

power cord is disconnected while the

"Shutdown" message is displayed.

Faulty main board. Replace the main board.

Do not disconnect the AC power cord

while the "Shutdown" message is

displayed.

Do not disconnect the AC power cord

while the "Shutdown" message is

displayed.

2. TROUBLESHOOTING

Problem Possible Cause Action

When the battery is installed, the

instrument suddenly changes to battery

operation.

When the battery is not installed, the

instrument power suddenly drops.

Thedateandtimeprintedonthe

recording paper is incorrect. —

Power voltage changed. Check that the AC power cord is

The backup battery for the clock is

discharged.

Faulty main board. Replace the main board.

Defibrillation

connected to the instrument. If the

trouble is not solved, the AC/DC unit or

AC power cord faulty. Replace the

AC/DCunitorACpowercord.

Set the date and time on the

Date/Volume screen. Refer to Section 3

of the Operator's manual

Replace the backup battery.

Problem Possible Cause Action

The defibrillator self-discharges the

energy during charging.

Cannot switch to synchronized mode.

In battery operation, the battery is

almost discharged.

Faulty high voltage unit.

(Error code appears on the screen.)

Appropriate lead is not selected. Change to the appropriate lead.

You tried to perform synchronized cardioversion with the PADDLE lead but synchronized cardioversion with the PADDLE lead is set to OFF on the Paddle Setup screen.

Faulty main key board. Replace the main key board.

Faulty main board. Replace the main board.

Operate the defibrillator on AC power

and recharge the battery. The battery

is automatically charged when the

defibrillator is connected to AC power.

When an error code appears on the

screen, refer to the Defibrillation table

in the Error Code section.

On the Paddle Setup screen, set the “syncbypaddlelead”toON.

“0 J” is printed on the defibrillation

report recording.

TTR is 15 Ω or less

TTR is 255 Ω or more.

Check that the paddles do not touch each other.

Press the paddles on the patient firmly.

Service Manual TEC-7600/7700 2.13

2. TROUBLESHOOTING

Monitoring

ECG

Problem Possible Cause Action

Dotted lines appear instead of the ECG

waveforms.

An ECG electrode is detached.

An electrode lead is disconnected from

the electrode.

Remove the cause of the trouble. If the

trouble is not solved, the main board is

fault. Replace the main board.

The ECG connection cable is

disconnected from the defibrillator.

An electrode lead is faulty.

Faulty main board.

No sync sound Faulty main board. Replace the main board.

No alarm is generated

The SILENCE ALARMS key is

pressed.

On the Setup screen, alarm is set to

OFF.

Press the SILENCE ALARMS key

again.

On the Setup screen, set the

upper/lower limit of each vital alarm.

Faulty main board. Replace the main board.

Faulty speaker or speaker cable. Replace the speakerNo sound

Faulty main board. Replace the main board.

SpO

Problem Possible Cause Action

SpO2 value is not displayed on the

screen.

The SpO2 adapter cable is disconnected from the SpO2/CO2 connector.

The SpO2 probe is disconnected from the SpO2 adapter.

Cable discontinuity in SpO2 adapter or probe

SpO2 probe attachment to the patient is

loose.

Dotted lines appear instead of the pulse

Faulty SpO2 probe. Replace the SpO2 probe.

waveforms.

Faulty SpO2 adapter. Replace the SpO2 adapter.

Faulty QI-762V DSI Interface Unit. Replace the DSI interface unit.

Faulty QI-763V DSI/AUX OUT

Interface Unit.

Deformed or damaged SpO2 probe Probe was disinfected in a way other

than the specified way.

SpO2 probe is repeatedly used. Replace the probe with a new one when

Connect the SpO2 adapter to the SpO2/CO2 connector.

Firmly connect the probe to the SpO2 adapter.

Replace the SpO2 adapter or probe.

Firmly attach the probe to the patient.

Replace the DSI/AUX OUT interface

unit.

Replace the probe with a new one. Use the specified disinfecting method.

its lifetime is over.

2.14 Service Manual TEC-7600/7700

Problem Possible Cause Action

The measured value is not displayed on the screen.

The red LED on the CO2 adapter blinks.

2. TROUBLESHOOTING

The CO2 sensor kit cable is disconnected from the SpO2/CO2

Connect the CO2 sensor kit cable to the SpO2/ CO2 connector.

connector.

CO2 gas is in the inspiration.

With the CO2 sensor kit, measurements are based on the assumption of no CO2 gas in the inspiration. Do not connect a Jackson Rees respiration circuit or Mapleson D respiration circuit to the patient. Measurement cannot be done correctly.

The airway adapter is dirty.

Replace the airway adapter with a new

one.

The measurement is preformed where atmospheric pressure is low, such as at

Consider the atmospheric pressure when making evaluations.

high altitude.

CO2 sensor or CO2 adapter is faulty. Replace the CO2 sensor or CO2

adapter with a new one.

The respiration has not been detected for longer than 20 s.

The red LED blinks when the respiration has not been detected for longer than 20 s regardless of the alarm setting on the defibrillator.

Service Manual TEC-7600/7700 2.15

2. TROUBLESHOOTING

NIBP

Trouble Possible Cause Action

The displayed cuff type is not correct. The air hose is not connected to the

cuff socket firmly. Cuffinflationpressureislessthan10 mmHg.

The air hose is not connected to the

cuff socket properly.

The cuff is not wrapped around the arm

Connect the air hose to the socket firmly. Connect the air hose to the socket properly. Wrap the cuff around the upper arm.

or is wrapped too loosely. The cuff does not inflate when the NIBP START/STOP key is pressed.

The air hose is not connected to the

cuff socket.

The cuff hose or air hose may be folded

Connect the air hose to the socket firmly. Check the cuff hose and air hose.

or squeezed. Abnormal measurement results are displayed.

The cuff size is not correct. Select the cuff which fits the patient’s

limb circumference. The cuff is not wrapped around the arm correctly. NIBP data is not correct because of body movement. The cuff is touched during measurement. The cuff is not wrapped at the correct

Wrap the cuff around the upper arm,

not too tightly or too loosely.

Prevent the patient from moving during

measurement.

Do not touch the cuff during

measurement.

Wrap the cuff at the correct position. position.

The cuff is suddenly deflated during inflation.

TheNIBPSTART/STOPkeyispressed during inflation. The energy charging for defibrillation is started.

—

Form the start of charging to

discharging, the NIBP measurement

cannot be preformed. In battery operation, the battery is almost discharged. The air hose is disconnected from the NIBP socket (The NIBP air hose disconnected” message is displayed).

Replace the battery or switch to AC

operation.

Connect the air hose properly. When

NIBP monitoring is not necessary, press

the SILENCE ALARM key to silence

the alarm. The NIBP display can be

cleared

Auto measurement does not start even when the time interval has passed.

ThetimeintervalfortheNIBPauto measurement is changed. The measurement is stopped by the safety circuit (The “NIBP safety circuit operating” message is displayed). The cuff inflation pressure is deflated enoughorduringNIBPmeasurement

Check the time interval.

Wait for 40 seconds before

remeasurement (This measurement is

canceled).

The measurement automatically starts

after the stop interval. stop interval (2 or 30 seconds). The previous measurement is not

This measurement is canceled. complete.

The cuff suddenly inflates. The measurement mode is set to auto

Check the time interval. mode.

Cannot connect cuff to the air hose. Unspecified cuff is used. Use a cuff specified by Nihon Kohden.

If none of the actions solve the problem, replace the NIBP unit.

2.16 Service Manual TEC-7600/7700

2. TROUBLESHOOTING

Problem Possible Cause Action

Cannot measure NIBP.

Noise which disables calculation of the blood pressure has interfered. The pulse wave is unstable due to arrhythmia.

Remove the cause. Do not touch the cuff during measurement. Ask the patient not to move too much and perform invasive blood pressure measurement as required.

The air hose is bent or squeezed. Remove the cause.

Thecuffhaswornout. Useanewcuff.

Increase the measuring interval.Blood congestion occurs. Measuring over a long period of time at

intervals less than 2.5 minutes.

Do not measure NIBP over a long time.

Thrombus occurs. Measuring a sickle anemia patient. Do not perform NIBP measurement on

asickleanemiapatient. Buzzing sounds when the NIBP START/STOP key is pressed and NIBP cannot be measured.

TheNIBPSTART/STOPkeyispressed before the cuff inflation pressure has deflated enough or during NIBP

Wait for the NIBP measurement stop

interval to elapse before

remeasurement.

measurement stop interval (2 or 30 seconds). The energy charging for defibrillation is started.

Form the start of charging to

discharging, the NIBP measurement

cannot be preformed.

In battery operation, the battery is almost discharged. The measurement is stopped by the safety circuit (The “NIBP safety circuit

Replace the battery or switch to AC

operation.

Wait for 40 seconds before

remeasurement.

operating” message is displayed). The air hose is disconnected from the NIBP socket (The NIBP air hose disconnected” message is displayed).

Connect the air hose properly. When

NIBP monitoring is not necessary, press

the SILENCE ALARM key to silence

the alarm. The NIBP display can be

cleared Thesizeofthemeasurementdataon the screen is small.

The size of the measurement data changes to small 10 seconds after the

—

last measurement.

Service Manual TEC-7600/7700 2.17

2. TROUBLESHOOTING

Recording

Problem Possible Cause Action

Printing is blurred. Dots are missing. The specified recording paper is not

used.

The thermal head is dirty. Clean the thermal head with the head

There is no printing.

The recording paper is not loaded. Load new recording paper.

Recording unit door is not properly

closed.

The recording paper is set with the

wrong side facing up.

Faulty key board. If the lamp does not light when you

Faulty recorder.

Faulty main board.

Use the specified recording paper.

cleaning pen. If the trouble not solved.

The recorder unit is faulty. Replace the

recorder unit.

Close the door until it clicks.

Set the recording paper correctly.

press the record key, check the key

function and recorder with the System

Maintenance screen. If the recorder

check is passed, the key board is faulty.

Replace the key board.

If the lamp lights when you press the

record key, check the recorder in the

System Maintenance screen.

Printing is light. The recording unit temperature is too

hot.

Battery

Problem Possible Cause Action

The battery charging lamp is blinking. The instrument is too hot.

Faulty battery. Replace the battery with a new one.After starting battery charging, the

charging stops. (neither battery

charging lamp nor battery charge

complete lamp lights.)

Charging circuit is not working. Replace the main board.

Cool the instrument down in a cooler

place. If the trouble is not solved, the

recorder unit or main board is faulty.

Replace the recorder unit or main

board.

Bring the instrument to a cool place.

When the battery temperature

decreases, charging resumes.

2.18 Service Manual TEC-7600/7700

Pacing (TEC-7631/7731 Series Only)

Problem Possible Cause Action

2. TROUBLESHOOTING

Although the PULSE lamp is lit, pacing

pulse does not appear on the ECG.

Although the START/STOP lamp is lit,

pacing does not start.

Faulty pacer board. Replace the pacer board.

Faulty main board. Replace the main board.

Pacing energy is set to 0 mA. Set the appropriate pacing energy with

the PACING OUTPUT control.

In DEMAND mode, selected pacing

rate is faster than the patient heart rate.

Faulty pacer board. Replace the pacer board.

Faulty main board. Replace the main board.

Set the pacing rate appropriate for the

patient heart rate. When the patient

heart rate is slower than the selected

pacing rate, pacing pulse is output

automatically.

Service Manual TEC-7600/7700 2.19

2. TROUBLESHOOTING

This page is intentionally left blank.

2.20 Service Manual TEC-7600/7700

Section 3 Disassembly

TEC-7621/7631 Series

Before You Begin .............................................................................................................. 3.1.1

Warnings, Cautions and Notes ............................................................................... 3.1.1

Required Tools ........................................................................................................ 3.1.1

Connection Diagram (TEC-7621/7631 Series) .................................................................. 3.1.2

Removing the Lower Casing .............................................................................................3.1.4

Removing the Paddles ........................................................................................... 3.1.4

Removing the Battery Pack ................................................................................... 3.1.5

Removing the Lower Casing ................................................................................... 3.1.5

Removing the AC/DC Unit ................................................................................................ 3.1.6

Removing the Main Board ................................................................................................ 3.1.7

Removing the Main Chassis .................................................................................. 3.1.7

Removing the Main Board ......................................................................................3.1.8

Removing the HV Inductor ............................................................................................... 3.1.9

Removing the HV Capacitor and Relay Unit ................................................................... 3.1.10

Cable Connections of the High voltage Unit ......................................................... 3.1.11

Removing the Test Load Board ....................................................................................... 3.1.12

Removing the Speaker ................................................................................................... 3.1.13

Removing the Pacer Board (TEC-7631 Series Only) ...................................................... 3.1.14

Removing the LCD Unit .................................................................................................. 3.1.15

Removing the Main Key Board and Key Board ............................................................... 3.1.16

Removing the Recorder Unit........................................................................................... 3.1.17

Removing the Paddle Locks ...........................................................................................3.1.18

Removing the Battery Connector.................................................................................... 3.1.19

TEC-7721/7731 Series

Before You Begin .............................................................................................................. 3.2.1

Warnings, Cautions and Notes ............................................................................... 3.2.1

Required Tools ........................................................................................................ 3.2.1

Connection Diagram (TEC-7721/7731 Series Defibrillator)................................................3.2.2

Removing the Lower Casing .............................................................................................3.2.4

Removing the Paddles ........................................................................................... 3.2.4

Removing the Battery Pack ................................................................................... 3.2.5

Removing the Lower Casing ................................................................................... 3.2.5

Service Manual TEC-7600/700 3C.1

Removing the AC/DC Unit ................................................................................................ 3.2.6

Removing the Main Board ................................................................................................ 3.2.7

Removing the Main Chassis .................................................................................. 3.2.7

Removing the Main Board and Terminal Bracket ....................................................3.2.9

Removing the HV Capacitor and Biphasic HV Unit ........................................................ 3.2.10

Removing the Test Load Board ....................................................................................... 3.2.11

Removing the Speaker ................................................................................................... 3.2.12

Removing the Pacer Board (TEC-7731 Series Only) ...................................................... 3.2.13

Removing the LCD Unit .................................................................................................. 3.2.14

Removing the Main Key Board and Key Board ............................................................... 3.2.15

Removing the Recorder Unit........................................................................................... 3.2.16

Removing the Paddle Locks ...........................................................................................3.2.17

Removing the Battery Connector.................................................................................... 3.2.18

Installing the Optional Unit

General ............................................................................................................................. 3.3.1

Installation Procedure ....................................................................................................... 3.3.2

Installing the VP-761V/VC/VE Voice Prompt Board................................................3.3.3

Operation Check .......................................................................................... 3.3.3

Installing the QI-762V DSI Interface Board or QI-763V DSI/AUX OUT

Interface Board ......................................................................................................3.3.4

Operation Check .......................................................................................... 3.3.4

Installing the AC-761VA/VC/VE/VK 12 Lead ECG Unit ..........................................3.3.5

Operation Check .......................................................................................... 3.3.6

Installing the SG-761VC/VE/VK NIBP Unit ............................................................ 3.3.6

Operation Check .......................................................................................... 3.3.7

Installing the QI-761V ZB Interface Unit ................................................................ 3.3.8

Operation Check ........................................................................................ 3.3.10

3C.2 Service Manual TEC-7600/7700

Disassembly -