Nihon Koden TEC-7731, TEC-7721, TEC-7631, TEC-7621 Service Manual

TEC-7621C

TEC-7631C

TEC-7621E

TEC-7631E

TEC-7621K

TEC-7631K

TEC-7721E

TEC-7731E

TEC-7721K

TEC-7731K

SERVICE MANUAL

DEFIBRILLATOR

TEC-7600/TEC-7700

0634-002039B

CONTENTS

Contents

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

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

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

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

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

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

Important Safety Information ............................................................................................... 1.6

Specifications .................................................................................................................... 1.23

Panel Description ............................................................................................................... 1.29

Front Panel ............................................................................................................... 1.29

Top Panel (TEC-7631/7731 Series Only) .................................................................. 1.30

External Paddles ...................................................................................................... 1.31

Left Side Panel ......................................................................................................... 1.31

Rear Panel ............................................................................................................... 1.32

Bottom Panel ........................................................................................................... 1.32

Composition ....................................................................................................................... 1.33

Standard Components ....................................................................................1.33

Options .......................................................................................................... 1.37

Board/Unit Location ............................................................................................................ 1.40

TEC-7600 Series Defibrillator ................................................................................... 1.40

TEC-7700 Series Defibrillator ................................................................................... 1.41

Block Diagram .................................................................................................................... 1.42

TEC-7600 Series Defibrillator ................................................................................... 1.42

TEC-7700 Series Defibrillator ................................................................................... 1.43

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

Service Manual TEC-7600/7700 1

CONTENTS

12 Lead ECG Meaurement ......................................................................................... 2.8

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

Instrument and SpO2/CO2 Mesurement ....................................................................... 2.9

NIBP Mesurement .................................................................................................... 2.11

12 Lead ECG Mesurement ....................................................................................... 2.11

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

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

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

Monitoring ................................................................................................................ 2.13

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 Battery Pack ................................................................................... 3.1.4

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

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

How to Troubleshoot .......................................................................................................... 3.2.1

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

Removing the Battery Pack ................................................................................... 3.2.4

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

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

C.2 Service Manual TEC-7600/7700

CONTENTS

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/VI 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

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

Service Manual TEC-7600/7700 3

CONTENTS

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

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

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

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

Check 12 Lead Screen ...................................................................................4.21

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 IEC60601-1-2 for electromagnetic

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

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

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

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

from its intended operational performance, you must avoid, identify and resolve the adverse electromagnetic effect

before continuing to use the equipment and/or system.

The following describes some common interference sources and remedial actions:

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

phone:

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

authorized radio station. Keep the emitter source such as cellular phone away from the equipment and/or

system.

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

system:

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

a different power supply.

3. Effect of direct or indirect electrostatic discharge:

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

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

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

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

far as possible from the radio wave receiver.

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

subsidiary or distributor for additional suggestions.

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 SpO2 because

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

When measuring SpO2, 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.

2

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

Explanations of the Symbols in this Manual and Instrument

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

On main unit

Symbol Description Symbol Description

Alternating current

Charging Equipotential

Charged (Battery charging is
finished)

ECG lead Input

ECG sensitivity ECG

Alarm off Pacing start

Check alarms Pacing stop

Real time/delayed recording Pacing intensity

Defibrillation-proof type BF
applied part

Dangerous voltage

Event recording

Inserting or removing the memory
card

Output Complying with IEC60529 IPX1

IPX4

Biphasic defibrillation: TEC-7700 series only

Complying with IEC60529 IPX4 Complying with IEC60529 IPX7

Biphasic defibrillation

Attention, consult operator’s
manual

Defibrillation-proof type CF
applied part

IPX1

IPX7

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

Service Manual TEC-7600/7700 v

On LCD

Symbol Description Symbol Description

Full battery charge remains Add Z-fold recording paper

More than 2/3 battery charge
remains

Battery discharged

Battery power for one 360 J

3

1

0

charging remains

Battery operation not available

QRS sync mark

The point of implanted pacemaker
pulse output

Alternating current (AC power
operation)

vi 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

Important Safety Information .............................................................................................. 1.6

Specifications ...................................................................................................................1.23

Panel Description .............................................................................................................. 1.29

Front Panel .............................................................................................................. 1.29

Top Panel (TEC-7631/7731 Series Only) ................................................................. 1.30

External Paddles ..................................................................................................... 1.31

Left Side Panel ........................................................................................................ 1.31

Rear Panel .............................................................................................................. 1.32

Bottom Panel .......................................................................................................... 1.32

Composition ...................................................................................................................... 1.33

Standard Components ...................................................................................1.33

Options ......................................................................................................... 1.37

Board/Unit Location ........................................................................................................... 1.40

TEC-7600 Series Defibrillator .................................................................................. 1.40

TEC-7700 Series Defibrillator .................................................................................. 1.41

Block Diagram ................................................................................................................... 1.42

TEC-7600 Series Defibrillator .................................................................................. 1.42

TEC-7700 Series Defibrillator .................................................................................. 1.43

Service Manual TEC-7600/7700 1C.1

This page is intentionally left blank.

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 Standard Option Standard

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.

CAUTIONS

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

IEC60601-1 “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

Important Safety Information

General

• Never use the defibrillator in a flammable atmosphere (i.e. areas with

flammable anesthetics, concentrated oxygen, hyperbaric oxygen) or in

an environment in which an electrical arc could ignite an explosion.

Otherwise, the defibrillator will explode or fire.

• Never use the defibrillator in a high-pressure oxygen medical care

tank. Otherwise, the defibrillator will explode or fire.

• The defibrillator generates high voltage. The defibrillator must only

be operated by trained and qualified medical personnel.

• Radiofrequency or Electromagnetic Field

Do not use any kind of non-essential non-patient care device within a

radius of 1 meter around the defibrillator. The use of non-essential

non-patient care devices that emit radiofrequency or electromagnetic

fields may interfere with the operation of the defibrillator by causing

noise on the ECG waveform or error messages. If a non-essential

non-patient care device is accidentally placed near the defibrillator,

quickly remove it.

• MRI examination

- Do not install this defibrillator in an MRI examination room. The

defibrillator may not operate properly due to high-frequency

magnetic noise from the MRI.

- When performing MRI tests, remove all electrodes and transducers

from the patient which are connected to this defibrillator. Failure to

follow this warning may cause serious electrical burn on the patient

due to local heating caused by dielectric electromotive force. For

details, refer to the instruction manual for the MRI.

• Using with ESU

- When using this defibrillator with an ESU, the ESU return plate and

the electrodes for monitoring must be firmly attached to the patient.

If the return plate is not attached correctly, it may burn the patient’s

skin where the electrodes are attached. Refer to the instruction

manual for the ESU.

- When using an ESU, use this defibrillator only in the MONITOR

mode and use the ECG electrodes for monitoring. Do not monitor

ECG with disposable pads, external paddles or internal paddles.

Otherwise, high frequency energy from the ESU causes abnormal

current to flow in the patient and unexpected discharge. This causes

serious electrical burn, shock, or other injury and damages the

defibrillator.

DANGER

WARNING

1.6 Service Manual TEC-7600/7700

1. GENERAL

WARNING continued

• Surrounding Conditions

Fluids such as Ringer’s saline solution and blood are excellent

electrical conductors; to avoid creating potentially dangerous

electrical paths, keep the defibrillator and the immediate area clean

and dry at all times.

CAUTION

• Install the defibrillator and ESU appropriately and perform

equipotential grounding. Otherwise, noise from the ESU may be

falsely recognized as QRS and ECG monitoring may not be performed

properly.

• Use only Nihon Kohden products and specified parts and accessories.

When other products, parts or accessories are used, the defibrillator

heats up and breaks down, and monitoring stops.

• Do not reuse disposable products.

Installation

WARNING

• Connect only the specified instrument to the defibrillator by following

the specified procedure. Otherwise, electrical leakage current may

harm the patient and operator.

• Connect only the specified instruments to the connector or sockets

marked with by following the specified procedure. Otherwise,

electrical leakage current may harm the patient and operator.

• Only use the provided power cord. Using other power cords may

result in electrical shock or other injury to the patient and operator.

When the provided power cord cannot be used, operate the

defibrillator on battery power.

• For patient safety, equipotential grounding of all instruments must be

performed. Consult with a qualified biomedical engineer.

• Do not connect several grounding leads directly to the equipotential

terminal because the grounding lead may be disconnected from the

terminal.

CAUTION

• The defibrillator should only be connected to external equipment

which complies with the CISPR 11 Second Edition 1990-09, Group 1

and Class B standard.

• Use only the KD-022A cart for this defibrillator. If another cart is used,

the cart may tip over or the defibrillator may fall off.

Service Manual TEC-7600/7700 1.7

1. GENERAL

Battery

DANGER

• Keep the battery pack away from fire. Do not heat the battery pack.

Otherwise, the electrolyte comes out and the battery pack explodes.

• Never short-circuit the + and – terminals on the battery pack with a

wire. Never store or carry the battery pack with metal such as

necklace or hair pins. The battery pack short-circuits and a large

current flows, causing leakage of the substance inside the battery and

battery explosion.

• Never disassemble or modify the battery pack. Never damage or

directly solder the sheath tube. The battery pack short-circuits, the

electrolyte comes out and the battery pack explodes.

• Do not subject the battery pack to a strong mechanical shock. The

battery leaks and explodes.

• Do not use a battery which is damaged, such as from falling. There is

a gas discharge valve inside the battery and if this valve is damaged,

the gas cannot be discharged, causing the battery to explode.

• If the battery pack is damaged and the substance inside the battery

(alkaline liquid) contacts the eyes or skin, wash immediately and

thoroughly with water and see your physician. Never rub your eyes,

otherwise you may lose your eyesight.

• The battery pack has + and – polarity. Make sure that the battery is

installed with the correct polarity direction. Otherwise, the substance

inside the battery leaks and the battery pack explodes.

• Do not charge the battery pack with an instrument other than this

defibrillator. With another instrument, abnormal current flows and the

substance inside the battery leaks and the battery explodes.

• Do not connect the battery pack to an AC outlet or lighter socket in a

car. The substance inside the battery leaks and the battery pack

explodes.

WARNING

• Check the battery performance once a month.

• When you start using a new battery pack, write down the date of

battery first use on the label on the battery pack.

• Replace the battery pack every one year.

• During the battery test, the defibrillator cannot perform defibrillation

or cardioversion with battery power. Use the defibrillator on AC

operation or use another defibrillator. If the battery is deteriorated or

is not charged enough, defibrillation or cardioversion cannot be

performed.

• Do not immerse the battery pack in water or seawater. The battery

heats up and rusts and the substance inside the battery leaks.

• Never use a battery pack which is damaged, discolored or has leakage.

A damaged battery explodes if used.WARNING continued

• Do not leave the battery unused for more than one year. The battery

may leak.

1.8 Service Manual TEC-7600/7700

1. GENERAL

CAUTION

• When inserting or removing the battery, disconnect the power cord

from the defibrillator. Otherwise, the operator may get electrical

shock.

• To keep the battery fully charged, always keep the power cord

connected to the AC outlet even when the defibrillator is not used.

• Do not expose the battery pack to direct sunlight or leave in a high

temperature place. The lifetime of the battery pack may be shortened,

the performance of the battery may be degraded and the substance

inside the battery may leak.

• The battery pack must be inserted by a qualified service personnel.

• Keep the battery pack away from children.

• Before disposing of the battery, check with your local solid waste

officials for details in your area for recycling options or proper

disposal. The battery is recyclable. At the end of its useful life, under

various state and local laws, it may be illegal to dispose of this battery

into the municipal waste stream.

Service Manual TEC-7600/7700 1.9

1. GENERAL

Disposable Pads

WARNING

• Failure to comply with the following warnings may cause serious skin

burn or insufficient energy discharge and pacing current to the heart.

- Do not reuse disposable pads. The pads are disposable.

- If the pad package is broken, dispose of the pads and do not use

them.

- Do not use the pads if they are past the expiration date on the

package.

- Use the disposable pads as soon as possible after removing them

from the package. Do not use a pad which is left for a long period of

time after being removed from the package.

- Do not use the disposable pads if the gel has become dry, or the gel

breaks down and releases water.

- Do not use the disposable pads if the color of the gel changes to

dark brown and dark brown gel is on the protective liner.

• If any pad or connector gets wet, replace it with a new one. If a wet

pad or connector is used, it may cause electrical shock.

• Replace the disposable pads after 1 hour pacing.

CAUTION

• When using the disposable pads for long term ECG monitoring,

replace them every 24 hours. Failure to follow this caution may cause

insufficient pacing current and insufficient energy discharge to the

heart.

• Do not attach a disposable pad over another pad. Failure to follow

this caution may cause serious skin burn.

• Do not put heavy objects on the disposable pads or bend the pads.

Otherwise the pads get damaged and deteriorated, resulting in skin

burn on the patient.

1.10 Service Manual TEC-7600/7700

1. GENERAL

Defibrillation,
Cardioversion and AED

General

WARNING

• Before defibrillation and cardioversion, make sure that no one is in

contact with either the patient or any metal part of any equipment or

cables which supports or is connected to the patient. Failure to follow

this warning causes serious electrical shock or injury.

• Before defibrillation and cardioversion, remove all electrodes, probes

and transducers connected to a connector without a “ ” or “ ”

mark from the patient. Otherwise the operator may get electrical

shock and the connected instrument may be damaged.

• Before defibrillation and cardioversion, move all electrodes and

medicine on the patient’s chest to positions where the defibrillator

paddle or disposable pad will not touch. If the defibrillator paddle or

disposable pad directly touches electrodes or medicine, it causes skin

burn on the electrode or medicine attachment site.

• Do not carry or move the defibrillator when the charged energy

remains in the defibrillator. If the defibrillator falls, it discharges

energy and can cause electrical shock.

• For this defibrillator, the CONTACT lamp on the STERNUM paddle

indicates skin-paddle contact impedance. If the yellow or orange lamp

lights, the defibrillator may cause serious electric burn on the

patient’s skin and poor energy discharge to the patient. In case of an

emergency, medical personnel should decide whether to execute

discharge immediately, regardless of the CONTACT lamp display, or

take action to make good contact before discharge.

• Pay careful attention to the energy selection when using the pediatric

electrode plates. Applying high energy with the pediatric electrode

plates can cause serious electrical burn because the electrode plates

are small.

• Use the ECG monitoring electrodes (disposable electrodes) to monitor

the ECG waveforms. Stable ECG cannot be acquired with the PADDLE

lead because it is difficult to hold the paddles stable. ECG acquired

from external paddles, internal paddles or disposable pads is unstable

after discharge because of high polarization voltage.

• Do not perform defibrillation or cardioversion in a wet place. Before

defibrillation or cardioversion, move the patient and defibrillator to a

dry place. Otherwise the operator may get electrical shock.

• Do not discharge near a person or object other than the patient or test

electrode plate or energy checker. It may cause electrical shock to the

person or object.

• Confirm that there is no artifact on the ECG. If there is artifact on the

ECG, signals other than ECG are misrecognized to be QRS and

accidental discharge may occur which is not synchronized with the

patient’s QRS wave.

Service Manual TEC-7600/7700 1.11

1. GENERAL

WARNING continued

• Do not perform synchronized cardioversion with the PADDLE lead

unless it is absolutely necessary. In synchronized cardioversion with

the PADDLE lead, artifact may be misrecognized as QRS and

accidental discharge may occur which is not synchronized with the

patient’s QRS wave.

• Never select “TEST” for the ECG lead. “TEST” is for maintenance and

the waveform displayed on the screen is not the patient’s ECG. If

synchronized cardioversion is performed with the TEST lead,

accidental discharge occurs which is not synchronized with the

patient’s QRS wave and it may cause ventricular fibrillation.

• For safe synchronized cardioversion, a defibrillator discharge must

occur within 60 ms of the peak of the ECG’s R wave. The TEC-7600

detects the peak of the R wave and effects the discharge within 25 ms

of the detected peak of R wave. When an external instrument is used to

provide the ECG signal, it must amplify the ECG signal from the

patient 500-1000 times and output the amplified ECG signal to the

TEC-7600 within 35 ms of the peak of the R wave so that the overall

delay from the peak of the R wave to discharge does not exceed 60

ms. If these conditions are not met, the cardioversion may be

ineffective or may cause ventricular fibrillation.

• The apex-posterior placement is not suitable for ECG monitoring or

AED analysis.

• The anterior-posterior placement is not suitable for defibrillation,

cardioversion, ECG monitoring or AED analysis. Use this placement

only for pacing.

CAUTION

When performing synchronized cardioversion, confirm that the SYNC

lamp is lit before every discharge. If “Sync mode after CV” is set to

Defib on the System Setup-Configuration screen, the defibrillator

automatically turns to the asynchronous defibrillation mode.

With External Paddles

WARNING

• Apply contact gel only to the electrode plates of the external paddles.

If contact gel gets on any other part of the defibrillator, it may cause

electrical shock to the operator.

• Do not apply contact gel by hand. Failure to follow this warning may

cause serious electrical burn, shock, or other injury.

1.12 Service Manual TEC-7600/7700

1. GENERAL

WARNING continued

• Do not grasp the paddle handles with the wet hand or the hand with

contact gel attached. Failure to follow this warning may cause

electrical shock to the operator.

• Apply contact gel to the electrode plates of the external paddles.

Failure to apply contact gel causes serious skin burn.

• Do not touch the electrode plate or edge of the paddle. Failure to

follow this warning may cause serious electrical burn, shock, or other

injury.

• When charging or discharging, do not touch anything other than the

handles. Failure to follow this warning causes electrical shock to the

operator.

• Before discharging, confirm that the paddles are firmly pressed

against the chest wall. Failure to follow this warning causes serious

skin burn or poor energy discharge to the heart.

• Do not perform open discharge into the air. This may cause electrical

shock to the operator or damage the defibrillator.

• Do not discharge the energy if the paddles are shorted to each other

by contact gel. Failure to follow this warning causes serious electrical

burn and poor energy discharge to the heart.

CAUTION

• If the patient’s body is wet, thoroughly wipe the moisture off the skin

so that the paddles do not short to each other.

• Do not discharge when the paddles touch each other. This may

damage the defibrillator.

With Disposable Pads

WARNING

• Do not attach pads on the papilla, electrodes or medicine on the

patient’s body. Failure to follow this warning causes serious skin

burn.

• Fit the pad closely to the body surface so that current flows uniformly

through the pad. Failure to follow this warning causes serious skin

burn or insufficient energy discharge to the heart.

• During charging or discharging, do not touch the pads or connectors.

Failure to follow this warning causes electrical shock to the operator.

• Before discharging, confirm that the pads are firmly applied to the

chest wall. Failure to follow this warning causes serious skin burn or

poor energy discharge to the heart.

Service Manual TEC-7600/7700 1.13

1. GENERAL

WARNING continued

• Do not discharge if the pads overlap each other or if the pads are

shorted to each other by anything conductive such as contact gel.

Failure to follow this warning causes serious electrical burn and poor

energy discharge to the heart.

CAUTION

• When connecting the pad adaptor to the paddle connector, do not

bend or damage the connector pin. Otherwise energy cannot be

discharged to the pads.

• If the patient’s body is wet, thoroughly wipe the moisture off the skin

so that the pads do not short to each other.

With Internal Paddles

WARNING

• Always sterilize the internal paddles before use. Failure to follow this

warning may cause serious infection.

• Pay careful attention to the energy selection when using internal

paddles. Applying high energy to the heart may cause cardiac muscle

necrosis. Low energy is recommended.

• During charging and discharging, grip the internal paddles between

the guard at the top of the handle and the cable. If you grip the handle

between the electrode and the guard, you may get an electrical shock.

• Before discharging, confirm that the paddles are firmly positioned

against the heart. Failure to follow this warning causes serious skin

burn or poor energy discharge to the heart.

• Do not perform open discharge into the air. This may cause electrical

shock to the operator or damage the defibrillator.

CAUTION

• Do not twist the internal paddle holding the electrode part or give

strong impact to the paddle. It damages the electrode part.

• When connecting the internal paddles to the paddle connector, do not

bend or damage the connector pin. Otherwise energy cannot be

discharged to the paddles.

• Do not discharge when the paddles touch each other. This may

damage the defibrillator.

1.14 Service Manual TEC-7600/7700

1. GENERAL

AED

WARNING

• Do not attach pads on the papilla, electrodes or medicine on the

patient’s body. Failure to follow this warning causes serious skin

burn.

• Fit the pad closely to the body surface so that current flows uniformly

through the pad. Failure to follow this warning causes serious skin

burn or insufficient energy discharge to the heart.

• When you perform defibrillation in an ambulance, stop the car.

• During charging or discharging, do not touch the pads or connectors.

Failure to follow this warning cause electrical shock to the operator.

• Before discharging, confirm that the pads are firmly applied to the

chest wall. Failure to follow this warning causes serious skin burn or

poor energy discharge to the heart.

• Do not discharge if the pads overlap each other or if the pads are

shorted to each other by anything conductive such as contact gel.

Failure to follow this warning causes serious electrical burn and poor

energy discharge to the heart.

CAUTION

• Before AED analysis or defibrillation, confirm that the patient is

unconscious and has no respiration and no pulse.

• The ECG of a child or a patient with a implanted pacemaker cannot be

analyzed correctly. For these patients, follow the physician’s

instruction.

• During AED analysis, do not touch or move the patient, pad adaptor

and disposable pad cable. Stop the life saving treatment such as CPR.

Otherwise, correct analysis result cannot be obtained. If the ECG

baseline is wandering because of surrounding conditions,

measurement conditions or electrode conditions, remove the causes

before performing AED analysis.

• When connecting the pad adaptor to the paddle connector, do not

bend or damage the connector pin. Otherwise energy cannot be

discharged to the pads.

• If the patient’s body is wet, thoroughly wipe the moisture off the skin

so that the pads do not short to each other.

• Do not discharge when the paddles touch each other. This may

damage the defibrillator.

Service Manual TEC-7600/7700 1.15

1. GENERAL

Pacing

WARNING

• Do not perform pacing while using an ESU. Before using an ESU, turn

the defibrillator power off and remove disposable pads from the

patient. Otherwise, high frequency energy from the ESU causes

abnormal current to flow in the patient and causes serious electrical

burn, shock, or other injury. It also damages the defibrillator.

• Always monitor the ECG waveform with the ECG connection cable and

ECG electrodes.

• Confirm that there is no artifact on the ECG. If there is artifact on the

ECG, signals other than ECG are misrecognized to be QRS and

correct pacing cannot be performed.

• Do not touch the patient during pacing. Failure to follow this warning

may cause electrical shock.

• During pacing, do not touch the pads or connectors. Failure to follow

this warning causes electrical shock to the operator.

• The pacing rate must be determined by qualified medical personnel

based on the heart rate of the patient in a normal state.

• The pacing current must only be increased by qualified medical

personnel decision.

• Keep the current intensity as low as possible to minimize pain and

discomfort to the patient.

• Failure to follow the following warnings causes serious skin burn.

- Do not attach the pads over ECG electrode.

- Do not attach pads on the papilla or medicine on the patient’s

body.

- Fit the pad closely to the body surface so that current flows

uniformly through the pad. This reduces the required pacing

current and pain and discomfort to the patient.

• The apex-posterior placement is not suitable for ECG monitoring or

AED analysis.

• The anterior-posterior placement is not suitable for defibrillation,

cardioversion, ECG monitoring or AED analysis. Use this placement

only for pacing.

• Never select “TEST”. “TEST” is for maintenance and the waveform

displayed on the screen is not the patient’s ECG. Failure to follow this

warning causes accidental pacing which is not synchronized with the

patient’s QRS wave.

• Do not change the sensitivity or ECG lead setting after pacing is

started. If one of these settings is changed, the pacing stops for 3

seconds. Failure to follow this warning may cause serious heart

attack.

• For 300 ms after the pacing pulse is output, no signal can be detected

as a QRS wave.

1.16 Service Manual TEC-7600/7700

ECG Monitoring

1. GENERAL

CAUTION

• Check that the pacing pulse is effectively working by observing ECG

on the screen.

• When connecting the pad adaptor to the paddle connector, do not

bend or damage the connector pin. Otherwise energy cannot be

discharged to the pads.

• If the patient’s body is wet, thoroughly wipe the moisture off the skin

so that the pads do not short to each other.

WARNING

• When using a defibrillator together with the monitor, use Ag/AgCl

electrodes. Other types of electrodes, stainless steel in particular, will

adversely affect the ECG waveform by slowing the baseline recovery

on the monitor and result in no monitoring immediately following

defibrillation.

• False low heart rate indicators may occur with certain pacemakers

because of electrical overshoots.

• Keep pacemaker patients under close observation. The pacemaker

rate may be counted during cardiac arrest and certain arrhythmias. Do

not rely only on heart rate alarms and the displayed heart rate.

• The apex-posterior placement is not suitable for ECG monitoring or

AED analysis.

• The anterior-posterior placement is not suitable for defibrillation,

cardioversion, ECG monitoring or AED analysis. Use this placement

only for pacing.

• With the pacing pulse rejection ON, narrow width QRS of a premature

baby or infant cannot be detected correctly and the defibrillator may

miscount QRS. In this case, set the pacing pulse rejection to OFF.

• Turn the pacing pulse rejection to OFF when monitoring a child.

Otherwise child’s QRS may not be recognized.

CAUTION

• When the “Check ECG Electrodes” message is displayed, ECG cannot

be monitored and the ECG alarm does not function. Check the

electrode, ECG connection cable, electrode leads and connection

cable and if necessary, replace it with a new one.

• Turn the pacing pulse rejection to ON when monitoring a pacemaker

patient. Otherwise QRS and pacemaker spike may not be

distinguished and pacemaker failure may not be recognized.

Service Manual TEC-7600/7700 1.17

1. GENERAL

SpO

2

WARNING

• Measurement may be incorrect in the following cases.

· When the patient’s carboxyhemoglobin or methemoglobin increases

abnormally

· When dye is injected in the blood

· When using an electrical surgery unit

· During CPR

· When there is body movement

· When there is vibration

· When measuring at a site with venous pulse

· When the pulse wave is small (insufficient peripheral circulation)

· When using an IABP (intra-aortic balloon pump)

• When not monitoring SpO2, disconnect the SpO2 adapter cable from

the defibrillator. Otherwise, noise from the probe sensor may interfere

and incorrect data is displayed on the screen.

• When using a disposable probe, change the measuring site every 8

hours. The skin temperature may increase at the attached site by 2 or

3°C and cause a burn or pressure necrosis. When using the probe on

the following patients, take extreme care and change the measurement

site more frequently according to symptoms and degree.

· A patient with a fever

· A patient with a peripheral circulation insufficiency

· Neonate or low birth weight infant with delicate skin

• To avoid poor circulation, do not wrap the tape too tight when fixing

the probe with surgical tape. Check the blood circulation condition by

observing the skin color and congestion at the skin peripheral to the

probe attachment site. Even for short-term monitoring, there may be

burn or pressure necrosis from poor blood circulation, especially on

neonates or low birth weight infants whose skin is delicate. Accurate

measurement cannot be performed on a site with poor peripheral

circulation.

• When measuring SpO2 of a patient who is in a state of shock or in

CPR (cardiopulmonary resuscitation), the acquired SpO2 data may be

incorrect due to the patient’s body movement.

• Do not use the probe during MRI examination because it may cause

skin burn on the probe attachment area. For details, follow the MRI

operator’s manual.

CAUTION

• For long term monitoring, check the circulation condition by

observing the skin color of the measuring site. To avoid circulation

insufficiency and skin burn, change the measurement site every

specified hours. Refer to the operator’s manual of the probe.

1.18 Service Manual TEC-7600/7700

1. GENERAL

CAUTION continued

• Do not pull or bend the probe cable, and do not let caster feet run over

the probe cable. Do not immerse the probe cable in chemical

solutions or water. Failure to follow these cautions may cause cable

discontinuity, short circuit, skin burn on the patient and incorrect

measurement data. Replace any broken probe with a new one.

• Under normal conditions, normal light has negligible effect on this

probe. However, when measuring under strong light (surgical light,

sunlight, etc.), cover the probe with a blanket or cloth. Otherwise,

measurement accuracy is affected.

• Turn off the power of cellular telephones, small wireless devices and

other devices which produce strong electromagnetic interference.

Otherwise, the waveforms and measurements are affected by

interference and the displayed data may be incorrect.

• Only use the specified probes. Otherwise SpO2 cannot be monitored

properly and instrument performance may be degraded.

• Do not use a probe which is past the expiration date on the package.

• Do not use a damaged or disassembled probe.

• Disposable probes are not sterilized.

• Use the disposable probe only once and for one patient only. Do not

reuse the disposable probe for another patient. It will cause cross

infection.

• When the attachment site is wet with blood or when the patient has

nail polish on, remove the dirt and nail polish before attaching the

probe. The transmitted light may decrease due to the blood or nail

polish and the measurement data may be incorrect.

• If the skin gets irritated or redness appears on the skin by the probe,

change the attachment site or stop using the probe.

• If the probe is attached to the same limb that is used for NIBP

measurement or an IBP catheter, the blood circulation at the

attachment site is affected and the measurement may not be correct.

Attach the probe to a limb where the blood circulation is not affected.

• If patient’s nail is long, cut it or attach the probe to another finger. The

probe cannot be attached properly to a finger with a long nail.

• Refer to the probe instruction manual for details.

• Be careful when removing the tape from neonatal skin.

• When removing a probe that is taped to the skin, do not pull the cable

part of the probe because this can damage the probe’s cable

connection.

• If the “Check SpO2 unit”, “Check SpO2 probe site”, “SpO2 probe not

working”, “SpO2 module not working” or “SpO2 measurement

unstable” message appears frequently even when the probe is

attached on a site with appropriate thickness, the probe is

deteriorated. Replace the probe with a new one.

• When error messages which indicate faulty probe or SpO2 adapter

appear, stop monitoring and replace the probe or SpO2 adapter with a

new one.

Service Manual TEC-7600/7700 1.19

1. GENERAL

CO

2

CAUTION continued

• Do not use the probe over its stated lifetime. Otherwise the SpO

measurement accuracy cannot be guaranteed.

• Do not use disposable probes for other patients. If the probe is dirty

with blood or bodily fluids, replace it with a new one.

2

WARNING

• When performing defibrillation or cardioversion during CO

monitoring with the CO2 sensor kit, remove the sensor from the

patient. When the sensor cannot be removed, do not touch the sensor

cable because the discharged energy may cause serious electrical

burn, shock or other injury.

• With the TG-901T3 CO2 sensor kit, measurements are based on the

assumption of no CO2 gas in the inspiration. The CO2 concentration in

the respiration is calculated by taking the CO2 concentration in the

inspiration as 0 mmHg. Therefore, measuring CO2 by connecting the

CO2 sensor kit to a patient under mouth-to-mouth respiration or to a

Jackson Rees circuit or Mapleson D circuit where CO2 gas may be

present during inspiration may result in the acquired data being lower

than the actual value.

• With the TG-901T3 CO2 sensor kit, the defibrillator cannot monitor CO

of patients younger than 3 years old or weighing less than 10 kg (22

lbs).

• Before MRI examination, remove the CO2 sensor kit from the patient.

Failure to follow this warning may cause serious electrical burn on

the patient due to local heating caused by dielectric electromotive

force. For details, refer to the MRI operator’s manual.

2

2

CAUTION

• The measurement may be inaccurate when a patient with an extremely

high respiration rate or patient with irregular respiration is monitored.

Read the measured values carefully.

• Measured value may be incorrect when the operating temperature

changes greatly.

• When the “CO2 sensor not working” or “CO2 adapter abnormality”

message is displayed, check the CO2 sensor kit and replace it if

necessary. CO2 cannot be monitored while the message is displayed.

• Only use the specified parts.

• Obey the CAUTION label on the CO2 gas cylinder.

• After the lifetime of the CO2 gas cylinder expires, the measurement

accuracy cannot be guaranteed.

1.20 Service Manual TEC-7600/7700

CO2 Sensor Kit and Airway
Adapter

1. GENERAL

WARNING

• Do not use the airway adapter on neonates because the dead space

volume of the airway adapter is about 5 cc.

• When using the airway adapter on children or patients with low

ventilatory amount, the CO2 may mix in the inspiration due to the

airway adapter’s dead space volume (5 cc), resulting in inaccurate

measured values or difficulty in detecting apnea.

CAUTION

• The airway adapter is not sterilized and is disposable. It can only be

used once. Do not reuse it for another patient. Otherwise it causes

cross infection.

• Do not sterilize the airway adapter. Safety cannot be guaranteed if the

airway adapter is sterilized.

• Use the Nihon Kohden specified airway adapter.

• Secure the CO2 sensor cable to the respiration circuit so that it is

parallel to the floor. If the cable is perpendicular to the floor, water

droplets may get onto the transparent film of the airway adapter, and

affect the measurement accuracy.

• The transparent film of the airway adapter is coated with the anti-

fogging material to prevent the moisture of the expiration and

inspiration from making the inside of the airway adapter foggy. Under

the operating environment specified in the TG-901T3 CO2 sensor kit

specifications, the anti-fogging material works for about 24 hours.

When this transparent film becomes dirty or is damaged, CO2 cannot

be measured correctly. For the optimum performance of the anti-

fogging material and correct measurement, follow the instructions

below.

- Do not use the airway adapter more than 24 hours.

- Replace the airway adapter if blood, sputum or mucus adheres to

the transparent film of the airway adapter.

- Do not damage the transparent film, and do not let dust or

chemical solutions contact the transparent film. Do not touch the

transparent film with your fingers, do not wipe it, and do not wash

it with alcohol or other detergents.

• Replace the airway adapter with a new one every 24 hours. Using the

airway adapter for longer than 24 hours affects measurement accuracy.

• When the transparent film of the airway adapter becomes dirty, replace

the airway adapter with a new one instead of cleaning it. Attempting

to remove the stain, touching with fingers or washing with a cleaner

damages the transparent film and makes correct measurement

impossible.

Service Manual TEC-7600/7700 1.21

1. GENERAL

Alarms

Maintenance

WARNING

All alarms except for instrument alarm group 1 are suspended during

two minutes alarm suspension.

CAUTION

• When the alarm limit is set to OFF, there will be no alarm for that limit.

Be careful when you set the alarm to OFF.

• Alarms about a parameter do not occur until the measurement of the

parameter starts.

WARNING

• When performing energy discharge test, discharge the energy with the

paddles kept in the paddle holders. Do not discharge with the paddle

released in the air or when the paddles are shorted. Failure to follow

this warning may cause serious electrical shock and damage to the

instrument.

• If defibrillation or cardioversion is necessary during battery test,

cancel the battery test and operate the defibrillator on AC power. Do

not use battery power because the battery may have been discharged

by the battery test.

Storage

CAUTION

• Before maintenance (cleaning, disinfection), turn the defibrillator

power off, disconnect the power cord from the AC outlet and then

remove the battery from the defibrillator. Failure to follow this caution

may result in electrical shock and instrument malfunction.

• Before battery replacement, turn off the defibrillator power and

disconnect the AC power cord from the defibrillator. Otherwise, the

operator may get an electrical shock.

• Do not disassemble or repair the instrument. Disassembly and repair

must be performed by qualified service personnel.

CAUTION

• To prevent overheating, leave the defibrillator lying flat and do not

cover it.

• Store the disposable pads in an environment described on the pads

package. If stored in an environment other than specified, the pads

become unusable.

1.22 Service Manual TEC-7600/7700

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: within 60 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

1. GENERAL

Current
(Amps)

81A

58A

Delivered energy= 360J

37A

0A

0246810

Service Manual TEC-7600/7700 1.23

Time (ms)

1. GENERAL

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

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

1.24 Service Manual TEC-7600/7700

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

1. GENERAL

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

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

Clock Accuracy

Service Manual TEC-7600/7700 1.25

1. GENERAL

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

IEC60601-1-2 (1993)

IEC61000-3-2 (1995)

Emissions: CISPR11 Group1,Class B

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

ECG Amplifier

1.26 Service Manual TEC-7600/7700

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), at AC filter off

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

CMRR ≥100 dB (against chassis ground) at AC filter 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

1. GENERAL

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

AC

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

Dimensions and Weight

Service Manual TEC-7600/7700 1.27

1. GENERAL

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)

1.28 Service Manual TEC-7600/7700

Panel Description

Front Panel

TEC-7600 Series

1. GENERAL

7

8

TEC-7700 Series

7

1

CardioLife

PACING

DISARM

DEMAND

FIXED

AED

SETUP

MONITOR

OFF

SYNC

CHARGE

AED

3

DISARM

AED

MONITOR

OFF

SYNC

2

FIXED

SETUP

CHARGE

AED

PACING

DEMAND

5

DISCHARGE

10

4

9

6

1

CardioLife

PACING

DISARMS

DEMAND

FIXED

AED

SETUP

MONITOR

OFF

SYNC

CHARGE

AED

DISARMS

AED

3

MONITOR

OFF

SYNC

2

FIXED

SETUP

CHARGE

AED

PACING

DEMAND

5

8

10

4

DISCHARGE

9

6

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

Service Manual TEC-7600/7700 1.29

1. GENERAL

12

14

13

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

17

21

20 191811

Top Panel (TEC-7631/7731 Series Only)

3

PACING
RATE(ppm)

PACING

1

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

6

PULSE

START

STOP

2

54

1.30 Service Manual TEC-7600/7700

External Paddles

1. GENERAL

14432

Name

1. CONTACT lamp

2. CHARGE button

3. CHARGE lamp

4. DISCHARGE buttons

Left Side Panel

2

43

1

Name

1. Recording paper exit

2. Door release lever

3. Card slot

4. Card eject button

Service Manual TEC-7600/7700 1.31

1. GENERAL

Rear Panel

1

2

Name

1. AC SOURCE socket

2. Equipotential ground terminal

3. Optional unit connector

3

Bottom Panel

Battery pack holder

1.32 Service Manual TEC-7600/7700

Composition

Standard Components

1. GENERAL

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

Service Manual TEC-7600/7700 1.33

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-0249 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

JC-755V Pad adapter

1.34 Service Manual TEC-7600/7700

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

Service Manual TEC-7600/7700 1.35

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

1.36 Service Manual TEC-7600/7700

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

Service Manual TEC-7600/7700 1.37

1. GENERAL

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)

AC-761VI 12 lead ECG unit for K version (ECG electrode apron)

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/VI

BR-906VA Electrode lead for AC-761VA

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

TSK-232NK ECG electrode apron for AC-761VI

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

1.38 Service Manual TEC-7600/7700

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. GENERAL

Service Manual TEC-7600/7700 1.39

1. GENERAL

Board/Unit Location

TEC-7600 Series Defibrillator

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

1.40 Service Manual TEC-7600/7700

Main board

TEC-7700 Series Defibrillator

1. GENERAL

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

Service Manual TEC-7600/7700 1.41

Main board

1. GENERAL

Block Diagram

TEC-7600 Series Defibrillator

1.42 Service Manual TEC-7600/7700

TEC-7700 Series Defibrillator

1. GENERAL

Service Manual TEC-7600/7700 1.43

1. GENERAL

This page is intentionally left blank.

1.44 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 Meaurement ........................................................................................ 2.8

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

Instrument and SpO2/CO2 Mesurement ......................................................................2.9

NIBP Mesurement ................................................................................................... 2.11

12 Lead ECG Mesurement ...................................................................................... 2.11

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

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

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

Monitoring ............................................................................................................... 2.13

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

No

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

No

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

No

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 relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty HV capacitor.

Faulty relay unit.

Faulty relay unit.

Faulty main board.

Faulty HV capacitor.

Faulty relay unit.

Faulty main board.

Faulty relay unit.

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 relay unit.

Replace the main board.

Replace the HV capacitor.

Replace the relay unit.

Replace the main board.

Replace the relay unit.

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.

An IGBT of the switch 1 on the

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.

An IGBT of the switch 2 on the

biphasic HV unit does not operate.

Two or more IGBTs of the switch 2 on

the biphasic HV unit does not operate.

An IGBT of the switch 3 on the

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 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 biphasic HV unit.

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 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 biphasic HV unit.

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 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.

2.4 Service Manual TEC-7600/7700

2. TROUBLESHOOTING

Operation Panel

NOTE

• 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 board.

Faulty main 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.

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 CO2 sensor kit is connected,

CO2 data is not received.

When the SpO2 adapter is connected,

SpO2 data 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 CO2 sensor kit.

Faulty DSI interface board.

Faulty DSI/AUX OUT

interface board.

Faulty main board.

Faulty SpO2 adapter.

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 main board.

Faulty main board.

Faulty ECG 12L board.

Faulty ECG-COM board.

Faulty main board.

Faulty main board.

Replace the

Replace the

Replace the

interface board.

Replace the main board.

Replace the Sp

Replace the

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 main board.

Replace the main board.

Replace the ECG 12L board.

Replace the ECG-COM board.

Replace the main board.

Replace the main board.

CO2 sensor kit.

DSI interface board.

DSI/AUX OUT

DSI interface board.

DSI/AUX OUT

O2 adapter.

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.

Replace the pacer board.

Replace the pacer board.

Replace the pacer board.

Replace the pacer board.

Replace the pacer board.

Replace the pacer board.

Replace the pacer board.

Service Manual TEC-7600/7700 2.7

2. TROUBLESHOOTING

12 Lead ECG Meaurement

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 Write error of the flash memory on the

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.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

Faulty ECG 12L board.

The power is turned off

during shutdown.

Faulty ECG 12L board.

Faulty ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the ECG 12L board.

Replace the 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 Mesurement

Message Meaning Possible Cause Action

Battery charge

timed out

Battery charging

error

Battery discharge

timed out

Capacitor test fail

CO2 module not

working

CO2 module

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.

CO2 module is faulty.

CO2 cable 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 CO2 sensor kit.

Faulty the QI-762V DSI

Interface Unit or QI-763V

DSI/AUX OUT Interface Unit.

CO2 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

---

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.

CO2

sensor 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 Mesurement

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.
Remove the cause if due to noise.

12 Lead ECG Mesurement

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.

The date and time printed on the

recording paper is incorrect.

Defibrillation

Power voltage changed. Check that the AC power cord is

connected to the instrument. If the

trouble is not solved, the AC/DC unit or

AC power cord faulty. Replace the

AC/DC unit or AC power cord.

--- Set the date and time on the

Date/Volume screen. Refer to Section 3

of the Operator's manual

The backup battery for the clock is

discharged.

Faulty main board. Replace the main board.

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.)

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.

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

You tried to perform synchronized
cardioversion with the PADDLE lead

On the Paddle Setup screen, set the

“sync by paddle lead” to ON.
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.

“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.

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

No alarm is generated

An ECG electrode is detached.

An electrode lead is disconnected from

the electrode.

The ECG connection cable is

disconnected from the defibrillator.

An electrode lead is faulty.

Faulty main board.

The SILENCE ALARMS key is

pressed.

On the Setup screen, alarm is set to

OFF.

Faulty main board. Replace the main board.

Faulty speaker or speaker cable. Replace the speakerNo sound

Faulty main board. Replace the main board.

Remove the cause of the trouble. If the

trouble is not solved, the main board is

fault. Replace the main board.

Press the SILENCE ALARMS key

again.

On the Setup screen, set the

upper/lower limit of each vital alarm.

SpO

2

Problem Possible Cause Action

SpO2 value is not displayed on the

screen.

The SpO2 adapter cable is
disconnected from the SpO
connector.

/CO

2

2

The SpO2 probe is disconnected from
the SpO

adapter.

2

Cable discontinuity in SpO2 adapter
or probe

SpO2 probe attachment to the patient
is loose.

Dotted lines appear instead of the pulse

waveforms.

Faulty SpO2 probe. Replace the SpO2 probe.

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.

Connect the SpO
SpO

/CO2 connector.

2

adapter to the

2

Firmly connect the probe to the SpO
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.

Replace the probe with a new one
when its lifetime is over.

2

2.14 Service Manual TEC-7600/7700

CO

2

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
SpO

2/ CO2 connector.

connector.

CO2 gas is in the inspiration. With the CO2 sensor kit, measurements

are based on the assumption of no CO
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 CO

2 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.

2

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.
Cuff inflation pressure is less than 10
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.

The NIBP START/STOP key is pressed
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.

The time interval for the NIBP auto
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
enough or during NIBP measurement

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.

The cuff has worn out. Use a new cuff.

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

a sickle anemia patient.
Buzzing sounds when the NIBP
START/STOP key is pressed and NIBP
cannot be measured.

The NIBP START/STOP key is pressed
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
The size of the measurement data on
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 Battery Pack .................................................................................. 3.1.4

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

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

How to Troubleshoot ......................................................................................................... 3.2.1

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

Removing the Battery Pack .................................................................................. 3.2.4

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

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

Service Manual TEC-7600/700 3C.1

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/VI 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 -

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 Battery Pack .................................................................................. 3.1.4

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

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

Service Manual TEC-7600/700 3.1C.1

This page is intentionally left blank.

3.1C.2 Service Manual TEC-7600/7700

3 DISASSEMBLY - TEC-7621/7631 SERIES

The procedures in this section explain how to remove, replace and install major components in the TEC-7621/7631 series

defibrillator (for TEC-7721/7731 series defibrillator, see the next section).

Before You Begin

Warnings, Cautions and
Notes

• The HV capacitor can store lethal amounts of energy. Be sure to

discharge this capacitor before touching any high voltage

component (HV capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

• Removal and replacement of any components in the instrument

should only be done by qualified service personnel.

• To avoid the possibility of injury to yourself or damage to the

instrument, do not install or remove any component while the power

is on. When disassembling, make sure that the instrument is off, the

AC power cord is disconnected from the instrument and the battery

pack is removed from the defibrillator.

There are several high voltage units inside the instrument:

LCD backlight, high voltage capacitor, pacing DC/DC converter and

switching regulator.

WARNING

Required Tools

CAUTIONS

• To avoid accidental discharge of static electricity which could

damage the components of the instrument, use a grounded wrist

strap when installing or removing any component of the instrument.

• Fuses on the main board and AC/DC unit cut off the power when an

abnormality occurs in the instrument. Eliminate the malfunction

before replacing the fuse. Use the correct fuse only.

• Use only parts recommended by Nihon Kohden to assure maximum

performance from your instrument.

NOTE

When the main boad is replaced with a new one, do the following

adjustment. Refer to “System Maintenance Screen - Adjust AD

Screen”.

- ECG sensitivity and offset

- Charge energy, delivered energy, TTR

- Battery charging setting

• Anti-static bench mat • Wrist ground strap

• Phillips screwdriver (insulated type, for M3 and M4 screws)

• Hex socket driver (for 3 mm spacer bolt and nut)

• Allen wrench • Tweezers

• Short bar

Service Manual TEC-7600/7700 3.1.1

3. DISASSEMBLY - TEC-7621/7631 SERIES

Connection Diagram (TEC-7621/7631 Series)

3.1.2 Service Manual TEC-7600/7700

3 DISASSEMBLY - TEC-7621/7631 SERIES

CNA132

CNA131

CNA221

CNA226

CNA011

CNA006

CNP503

CNA224
CNA005
CNP553
CNP552

CNA019
CNA018

CNA222

CNA003

CNP501

CNP556

CNP551

CNP554

CNP555

CNP557

CNA051

CNA024

CNA301

CNA102

CNA001

CNA002

CNA201

CNA004

CNJ101

CNJ102

TEC-7631 with QI-762V (option)

Service Manual TEC-7600/7700 3.1.3

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Lower Casing

Removing the Paddles

Paddle connector

Paddle release knob

Battery pack holder cover

Memory card slot

Eject button

Battery cable

Battery pack

1. Make sure that the power of the instrument is turned off.

2. Disconnect the AC power cord from the AC outlet and

defibrillator.

3. Remove the paddles. To remove the paddles, press and

hold the paddle release knob on the paddle connector and

pull the paddle connector toward you.

CAUTION

When removing the paddle do not pull anywhere

other than the paddle connector. Otherwise, the

paddle connector or paddle cable may be damaged.

4. Remove the memory card if it is inserted.

CAUTION

Make sure that the card eject button is depressed.

Otherwise, the button may be damaged when

removing the lower casing and the memory card

slot becomes unusable.

Removing the Battery Pack

3.1.4 Service Manual TEC-7600/7700

1. Unscrew the battery holder cover screw and remove the

battery pack holder cover.

2. Remove the battery cable and pull out the battery pack.

3 DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Lower
Casing

Remove the nine M4×10 binding head screws with washer and remove the lower

casing.

Service Manual TEC-7600/7700 3.1.5

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the AC/DC Unit

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the three M3 screws with spring washers to remove the three ground

leads.

3. Disconnect the CNA051 cable (to main unit, battery pack and relay unit) from

the AC/DC unit:

4. Pull up the AC/DC unit.

5. Disconnect the CNA001 cable from the AC inlet.

CNA051

AC/DC unit

CNA001

3.1.6 Service Manual TEC-7600/7700

Removing the Main Board

Removing the Main
Chassis

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

2 Remove the M3 pan screw with spring washer which secures the paddled

3 DISASSEMBLY - TEC-7621/7631 SERIES

WARNING

The HV capacitor can store lethal amounts of energy. Be sure to

discharge this capacitor before touching any high voltage

component (HV capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

the Lower Casing”.

socket cables to the main chassis and remove the paddle socket.

3. Remove the CNA222 cable which connects the paddle socket and main board

from the main board.

4. Remove the M3 pan screw with spring washer which secures the ECG

connector board to the main chassis and remove the ECG connector board.

5. Remove the CNA011 cable which is connected to the ECG connector board.

6. Remove the four M3 pan screws with spring washers which secure the main

chassis to the main board.

7. If the optional QI-762V DSI Interface Board or QI-763V DSI/AUX OUT

Interface Board is installed, disconnect the CNA227 cable which connects the

interface board and the main board from the interface board.

8. Remove the main chassis.

CNA222

Main chassis

Paddle socket

CNA011

ECG connector board

To LCD unit

Service Manual TEC-7600/7700 3.1.7

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Main Board

Film connector

Film cable

When the main chassis is removed, you can remove the main board.

1. Disconnect the following cables:

• CNA131 film cable: Connects to the LCD unit.

• CNA132 cable: Connects to the LCD inverter board.

• CNA221 film cable: Connects to the key board.

• CNA226 cable: Connects to the pacer board (TEC-7631 series only).

• CNA042 cable: Connects to the pacer board (TEC-7631 series only).

• CNP501 cable: Connects to the relay unit.

• CNA051 cable: Connects to the relay unit, battery pack and AC/DC unit.

• CNA019 cable: Connects to the recorder unit.

• CNA018 cable: Connects to the recorder unit.

• CNP503 cable: Connects to the pickup coil in the HV inductor.

• CNA224 cable: Connects to the relay unit

To remove the film cable from the film cable connector, gently release the lock

of the film cable connector with a small flat blade driver and your finger as

shown in the expanded illustration. Be careful because the film cable

connector is easily damaged.

2. Remove the two M3 pan screws, spacer and CNA005 ground lead (connected

to the AC/DC unit).

3. Remove the main board.

CNA221

CNA132

CNA131

Main board

CNA224

CNA226

CNA051

CNA042

CNP501

CNA019

CNA018

CNP503

CNA005

3.1.8 Service Manual TEC-7600/7700

Removing the HV Inductor

CNP551/557

CNP554

CNP556

CNP555

CNP503

HV inductor

The HV capacitor can store lethal amounts of energy. Be sure to

discharge this capacitor before touching any high voltage

component (HV capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the five wires (CNP551, CNP554, CNP555, CNP556 and CNP557

wire) from the HV inductor.

3 DISASSEMBLY - TEC-7621/7631 SERIES

WARNING

CNP555

Red

Black

CNP556

CNP554

3. Pull out the HV inductor.

4. Remove the CNP503 cable which connects the pickup coil and main board

from the pickup coil.

CNP557

CNP551

To paddle socket

CNP501
(to main board)

HV inductor (top view)

Service Manual TEC-7600/7700 3.1.9

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the HV Capacitor and Relay Unit

The HV capacitor can store lethal amounts of

energy. Be sure to discharge this capacitor before

touching any high voltage component (HV

capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

1. Remove the battery pack, memory card and lower casing.

Refer to “Removing the Lower Casing”.

2 Remove the AC/DC unit. Refer to “Removing the AC/

DC Unit”.

WARNING

HV capacitor

Relay unit

3. Remove the main chassis and main board. Refer to

“Removing the Main Board”.

4. Make short-circuit the two HV capacitor terminals with

the short bar which is connected to the ground terminal

on the wall with the ground lead.

5. Remove the four M3 pan screws with spring washers

which secure the HV capacitor to the lower casing and

remove the two HV capacitor fixing brackets.

6. Remove the cap of the CNP552 and CNP553 wires from

the HV capacitor.

7. Remove the HV capacitor.

8. Remove the three wires (CNP555, CNP554 and CNP556

wire) which connect the HV inductor and relay unit from

the HV inductor.

9. Pull out the relay unit.

3.1.10 Service Manual TEC-7600/7700

3 DISASSEMBLY - TEC-7621/7631 SERIES

Cable Connections of the
High voltage Unit

HV inductor

CNP555

CNP556

CNP554

NOTE

After replacing the HV capacitor or relay unit, always check the

following:

• TTR value

• Delivered energy

• Charge time

Refer to “System Maintenance Screen” in Section 5.

Relay unit

CNP557

CNP551

Red

Black

To paddle socket

CNP501
(to main board)

HV capacitor

Service Manual TEC-7600/7700 3.1.11

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Test Load Board

The HV capacitor can store lethal amounts of energy. Be sure to

discharge this capacitor before touching any high voltage

component (HV capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the AC/DC unit. Refer to “Removing the AC/DC Unit”.

3 Remove the main chassis and main board. Refer to “Removing the Main

Board”.

WARNING

Speaker cable

HV unit holder

CNA201

4. Remove the HV inductor. Refer to “Removing the HV Inductor”.

5. Remove the HV capacitor and relay unit. Refer to “Removing the HV

Capacitor and Relay Unit”.

6. Remove the three M3 pan screws with

spring washer and remove the HV unit

holder.

7. Disconnect the CNA201 cable (to main

board) and speaker cable from the test load

Test load board

board.

8. Remove the two M3 pan screws with

washers and spring washers on the test

electrode plate.

9. Remove the two M3 pan screws with

washer and spring washers and remove the

test load board.

.

3.1.12 Service Manual TEC-7600/7700

Removing the Speaker

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

2 Remove the AC/DC unit. Refer to “Removing the AC/DC Unit”.

3 Remove the main chassis and main board. Refer to “Removing the Main

3 DISASSEMBLY - TEC-7621/7631 SERIES

WARNING

The HV capacitor can store lethal amounts of energy. Be sure to

discharge this capacitor before touching any high voltage

component (HV capacitor, HV inductor, relay unit, paddle socket or

paddles) of the instrument.

the Lower Casing”.

Board”.

4. Remove the HV inductor. Refer to “Removing the HV Inductor”.

5. Remove the HV capacitor and relay unit. Refer to “Removing the HV

Capacitor and Relay Unit”.

6. Remove the M3 pan screw with spring washer.

8. Remove the speaker cable from the test load board and remove the speaker.

.

Speaker

Test load board

Service Manual TEC-7600/7700 3.1.13

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Pacer Board (TEC-7631 Series Only)

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the main chassis and main board. Refer to “Removing the Main

Board”.

3. Disconnect the following cables from the pacer board:

• CNA301 cable: Connects to the PACING OUTPUT control and PACING

RATE control.

• CNA226 cable: Connects to the main board.

• CNA042 cable: Connects to the main board.

4. Remove the three M3 pan screws with spring washers and remove the pacer

board.

CNA301

CNA226

CNA042

Pacer board

3.1.14 Service Manual TEC-7600/7700

Removing the LCD Unit

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

2 Remove the main chassis and main board. Refer to “Removing the Main

3. Remove the two M3 pan screws with spring washers and remove the LCD unit.

3 DISASSEMBLY - TEC-7621/7631 SERIES

the Lower Casing”.

Board”.

LCD-EMC sponge

CNA131

LCD unit

CNA006

NOTE

When assembling, pass the CNA131 film cable between the LCD-

EMC sponges.

Service Manual TEC-7600/7700 3.1.15

3. DISASSEMBLY - TEC-7621/7631 SERIES

Removing the Main Key Board and Key Board

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the main chassis and main board. Refer to “Removing the Main

Board”.

Film connector

Film cable

3. Disconnect the following cables:

• Rotary switch cable.

• CNA201 cable: Connects to the test load.

• CNA102 film cable: Connects to the main key board and key board.

To remove the film cable from the film cable connector, gently release the lock

of the film cable connector with a small flat blade driver and your finger as

shown in the expanded illustration. Be careful because the film cable

connector is easily damaged.

4. Remove the three M3 pan screws with washers and spring washers and remove

the main key board.

5. Remove the two M3 pan screws with washers and spring washers and remove

the key board.

To remove the Energy/Mode Select control knob on the front panel.

1) Remove the two allen screws on the Energy/Mode Select control knob.

2) Remove the knob, nut, washer and O ring from the rotary switch.

Knob
(Energy/Mode Select control)

CNA102

Main key board

Key board

CNA201

Rotary switch
(Energy/Mode Select control)

3.1.16 Service Manual TEC-7600/7700

Removing the Recorder Unit

1. Remove the battery pack, memory card and lower casing. Refer to “Removing

the Lower Casing”.

2 Remove the main chassis and main board. Refer to “Removing the Main

Board”.

3. Remove the two M3 pan screws with spring washers and pull out the recorder

unit.

3 DISASSEMBLY - TEC-7621/7631 SERIES

Recorder unit

Service Manual TEC-7600/7700 3.1.17