Nihon-Kohden TEC-9110, TEC-9130 Service manual

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SERVICE MANUAL

cardiofax Q

ELECTROCARDIOGRAPH

ECG-9110K, ECG-9130K ECG-9130P, ECG-9132K

0634-001325B

CONTENTS

Contents

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

Warnings, Cautions and Notes ....................................................................................... i

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

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

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

Service Policy ......................................................................................................................1.2

Specifications ......................................................................................................................1.3

Panel Description ................................................................................................................. 1.6

ECG-9110K Electrocardiograph ..................................................................................1.6

Top Panel ......................................................................................................... 1.6

Operation Panel................................................................................................1.7

Right Side Panel ..............................................................................................1.8

Left Side Panel.................................................................................................1.8

ECG-9130K/P Electrocardiograph .............................................................................. 1.9

Top View ........................................................................................................... 1.9

Operation Panel.............................................................................................. 1.10

Right Side Panel ............................................................................................ 1.11

Left Side Panel............................................................................................... 1.11

ECG-9132K Electrocardiograph ................................................................................ 1.12

Top View ......................................................................................................... 1.12

Operation Panel.............................................................................................. 1.13

Right Side Panel ............................................................................................ 1.14

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

Composition ....................................................................................................................... 1.15

ECG-9110K Electrocardiograph ................................................................................ 1.15

ECG-9130K Electrocardiograph ................................................................................ 1.16

ECG-9130P Electrocardiograph ................................................................................ 1.17

ECG-9132K Electrocardiograph ................................................................................ 1.18

Location .............................................................................................................................. 1.19

Block Diagram .................................................................................................................... 1.20

Connection Diagram ........................................................................................................... 1.21

Section 2 Maintenance ......................................................................... 2C.1

Replacement ........................................................................................................................ 2.1

Periodic Replacement Schedule ................................................................................. 2.1

Cleaning and Greasing .........................................................................................................2.2

Cleaning and Greasing Schedules.............................................................................. 2.2

Cleaning the Thermal Head ........................................................................................ 2.2

Cleaning the Paper Mark Sensor and Paper Empty Sensor ........................................ 2.3

Cleaning the Motor Rotation Sensor and Greasing the Motor Gear and

Gear Meshed with Motor Gear ..............................................................................2.4

Service Manual ECG-9110/9130 Rev B C.1

CONTENTS

Section 3 Troubleshooting and System Error Message .................. 3C.1

Troubleshooting Flowchart .................................................................................................... 3.1

Troubleshooting Table ...........................................................................................................3.4

Troubleshooting General Operation Problem............................................................... 3.4

Troubleshooting Recording Problem ........................................................................... 3.6

System Error Message ......................................................................................................... 3.7

Section 4 System Test and Setting ..................................................... 4C.1

System Test ......................................................................................................................... 4.1

Overall ........................................................................................................................ 4.1

Calling up the Test Level 1 .........................................................................................4.2

Calling up the Test Level 2 .........................................................................................4.3

Entering the System Test Number .............................................................................. 4.4

Executing the System Test ........................................................................................ 4.5

Quitting the System Test ............................................................................................ 4.6

Exiting the System Test Mode ................................................................................... 4.6

Demonstration ......................................................................................................................4.7

Recorder ...............................................................................................................................4.8

Thermal Head ..................................................................................................................... 4.11

Key .....................................................................................................................................4.12

Memory .............................................................................................................................. 4.13

Single Memory Test Mode ........................................................................................ 4.14

Continuous Memory Test Mode ................................................................................ 4.14

LCD/LED ............................................................................................................................4.15

Input Unit ........................................................................................................................... 4.17

Calibration .......................................................................................................................... 4.18

Communication .................................................................................................................. 4.19

CRO/EXT1 ......................................................................................................................... 4.21

System Setup Initialization ................................................................................................ 4.23

ECG Findings List Recording ............................................................................................. 4.24

Recording Resolution Setting ............................................................................................. 4.25

Cue Mark Adjustment ......................................................................................................... 4.26

Date and Time Setting ........................................................................................................ 4.28

Setting the Date and Time ........................................................................................ 4.28

Section 5 Board/Unit Description ..........................................................5C.1

Block Diagram..................................................................................................................... 5.1

Power Unit ........................................................................................................................... 5.2

ECG CONTROL Board ....................................................................................................... 5.2

FLASH ROM Board ............................................................................................................ 5.3

INVERTER Board ............................................................................................................... 5.3

Section 6 Disassembly and Assembly ..................................................6C.1

Before You Begin ................................................................................................................. 6.1

Warnings and Cautions ............................................................................................ 6.1

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

C.2 Service Manual ECG-9110/9130 Rev B

CONTENTS

Board and Unit Location ............................................................................................. 6.2

Cable Connection ....................................................................................................... 6.3

Removing the Top Casing Assy............................................................................................6.4

Removing the ECG CONTROL Board ..................................................................................6.5

Removing the Power Unit and POWER Board ......................................................................6.6

Replacing the Thermistor ............................................................................................ 6.7

Removing the Thermal Head ................................................................................................ 6.8

Removing the Thermal Head Only .............................................................................. 6.8

Removing the Thermal Head with the Thermal Head Bracket,

Thermal Head Spring and Thermal Head Axle ......................................................... 6.9

Removing the Motor Assy ................................................................................................. 6.10

Removing the Speaker Assy............................................................................................. 6.11

Removing the PAPER SENSOR Board Assy.................................................................... 6.12

Removing the Recorder Base ........................................................................................... 6.13

Removing the Battery Terminal Assy ................................................................................ 6.14

Removing the Magazine Assy .......................................................................................... 6.15

Removing the LCD Assy, INVERTER Board and LCD CN Board ..................................... 6.16

Removing the LCD Assy......................................................................................... 6.16

Removing the INVERTER Board ............................................................................ 6.17

Removing the LCD CN Board ................................................................................. 6.17

Removing the Membrane Assy Film Cable and KEY Board ............................................. 6.18

Removing the Membrane Assy Film Cable and KEY Board ................................... 6.18

Replacing the Membrane Assy Film Cable ............................................................. 6.19

Removing the Bottom Casing ........................................................................................... 6.20

Replacing the Fuse on the POWER Board ....................................................................... 6.21

Replacing the Lithium Battery on the ECG CONTROL Board .......................................... 6.22

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

Adjusting Thermal Head Position ........................................................................................ 7.1

Changing Magazine Paper Width ........................................................................................ 7.5

Adjusting Backlash between Motor Gear and Platen Axle Assy Gear ................................ 7.6

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

General Parts List ................................................................................................................8.2

Top Casing Assy .................................................................................................................. 8.6

Top Casing Assy, YZ-015H3 for ECG-9110K ..............................................................8.6

Top Casing Assy, YZ-014H4 for ECG-9130K ..............................................................8.7

Top Casing Assy, YZ-022H2 for ECG-9130P ..............................................................8.8

Top Casing Assy, YZ-035H7 for ECG-9132K ..............................................................8.9

Motor Assy, YZ-014H1 ....................................................................................................... 8.10

Gear Assy, YZ-014H0 .........................................................................................................8.11

Battery Terminal Assy, YZ-014H5 .......................................................................................8.12

LCD Top Casing Assy, YZ-013H9 ....................................................................................... 8.13

Cart ....................................................................................................................................8.14

KC-010A Cart ........................................................................................................... 8.14

KD-010A Cart ........................................................................................................... 8.16

Patient Cable Hanger .......................................................................................................... 8.18

Service Manual ECG-9110/9130 Rev B C.3

CONTENTS

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

Power Unit ............................................................................................................................ 9.1

CN101 (to AC Inlet) ....................................................................................................9.1

CN21 (to ECG CONTROL Board) ...............................................................................9.1

CN301 (to Thermal Head) ........................................................................................... 9.1

CN501 (to Battery) .....................................................................................................9.1

ECG CONTROL Board ......................................................................................................... 9.2

CNJ011 (to Thermal Head) ......................................................................................... 9.2

CNJ021 (to FLASH ROM Board) ................................................................................9.2

CNJ032 (to Key Connector)........................................................................................ 9.4

CNJ033 (to KEY Board) .............................................................................................9.4

CNJ035 (to Power Unit) .............................................................................................. 9.5

CNJ091 (to ECG Connector) ...................................................................................... 9.5

CNJ101 (to SIO Connector) .......................................................................................9.6

CNJ102 (to PAPER SENSOR Board) ........................................................................9.6

CNJ103 (to Motor Assy) .............................................................................................9.6

CNJ111 (to PC Card) .................................................................................................. 9.7

CNJ121 (to LCD CN Board) ........................................................................................ 9.7

CNJ401 (to CRO Connector) ...................................................................................... 9.7

CNJ402 (to EXT INPUT1 Connector) ......................................................................... 9.7

CNJ403 (to EXT INPUT2 Connector) ......................................................................... 9.7

FLASH ROM Board ..............................................................................................................9.8

CNJ021 (to ECG CONTROL Board) ........................................................................... 9.8

INVERTER Board ............................................................................................................... 9.10

CN1 (to ECG CONTROL Board) ...............................................................................9.10

CN2 (to LCD Module) ............................................................................................... 9.10

External Input/Output Socket .............................................................................................9.11

SIO Socket .............................................................................................................. 9.11

EXT Input and CRO Output ...................................................................................... 9.11

C.4 Service Manual ECG-9110/9130 Rev B

Conventions Used in this Manual and Instrument

Warnings, Cautions and Notes

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

WARNING

A warning alerts the user to 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, requirements, alternative methods or supplemental information.

Explanations of the Symbols in this Manual and Instrument

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

Cardiograph

Attention, consult operator’s manual

Equipotential terminal

Serial input/output terminal

Input terminal for analog signal

Output terminal for analog signal

Eject (magazine release button)

Type CF applied part

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

Battery

Service Manual ECG-9110/9130 Rev A i

Memory card slot

Operation panel (for ECG-9110K only)

Alternating current

“On” only for a part of equipment

“Off” only for a part of equipment

Battery charging

Battery check lamp

QRS sync lamp

Rhythm recording

Age

Paper speed

Gain

Reset

Paper feed

Filter

Copy

Calibration

START/STOP recording

Automatic control

Manual control

Periodic recording

Mark

ii Service Manual ECG-9110/9130 Rev A

Operation panel (for ECG-9130K only)

Alternating current

“On” only for a part of equipment

“Off” only for a part of equipment

Battery charging

Battery check

Display (for ECG-9130K only)

Mode

Rhythm

Paper feed

Mark

Filter

Copy

Calibration

START/STOP recording

Automatic control

Manual control

Patient cable

QRS sync mark

Attention, consult operator’s manual

Defibrillation-proof Type CF applied part

Service Manual ECG-9110/9130 Rev A iii

Section 1 General

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

Service Policy .................................................................................................................... 1.2

Specifications ..................................................................................................................... 1.3

Panel Description ............................................................................................................... 1.6

ECG-9110K Electrocardiograph .............................................................................. 1.6

Top Panel ....................................................................................................... 1.6

Operation Panel ............................................................................................. 1.7

Right Side Panel ............................................................................................ 1.8

Left Side Panel .............................................................................................. 1.8

ECG-9130K/P Electrocardiograph ........................................................................... 1.9

Top View ........................................................................................................ 1.9

Operation Panel ........................................................................................... 1.10

Right Side Panel .......................................................................................... 1.11

Left Side Panel ............................................................................................ 1.11

ECG-9132K Electrocardiograph ............................................................................ 1.12

Top View ...................................................................................................... 1.12

Operation Panel ........................................................................................... 1.13

Right Side Panel .......................................................................................... 1.14

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

Composition ..................................................................................................................... 1.15

ECG-9110K Electrocardiograph ............................................................................ 1.15

ECG-9130K Electrocardiograph ............................................................................ 1.16

ECG-9130P Electrocardiograph ............................................................................ 1.17

ECG-9132K Electrocardiograph ............................................................................ 1.18

Location ........................................................................................................................... 1.19

Block Diagram.................................................................................................................. 1.20

Connection Diagram ........................................................................................................ 1.21

Service Manual ECG-9110/9130 Rev B 1C.1

Introduction

1. GENERAL

This service manual provides useful information to qualified service personnel to

understand, troubleshoot, service, maintain and repair the ECG-9110K, ECG-

9130K/P and ECG-9132K Electrocardiograph (referred to in this service manual

as “the instrument”, “ECG-9110K” or “ECG-9130K” which includes ECG-9130P

and ECG-9132K).

All replaceable parts or units of this instrument and its optional units are clearly

listed with exploded illustration to help you locate the parts quickly.

The “System Test and Setting” and “Adjustment” sections in this service manual

describe the maintenance that should be performed by qualified service personnel.

The “Maintenance” section in the operator’s manual describes the maintenance

that can be performed by the user.

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

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

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

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

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

Service Manual ECG-9110/9130 Rev B 1.1

1. GENERAL

Service Policy

Nihon Kohden Corporation’s basic policy for technical service is to replace faulty

units, printed circuit boards or parts. We do not support component-level repair of

boards and units outside the factory for the following reasons:

• A special facility is necessary to repair multi-layer boards because most of the

components on the board are SMD (surface mount devices) and most of the

circuits employ a gate array method.

• To fulfill safety certification requirements, a special facility is necessary to verify

safety as medical equipment after the power unit is repaired.

NOTE

• When ordering parts or accessories from your nearest Nihon Kohden

Corporation’s distributor, 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.

1.2 Service Manual ECG-9110/9130 Rev B

Specifications

ECG input

Input impedance 10 MΩ or more

Electrode offset tolerance ±500 mV or more

Input unit protection Isolated and defibrillator protected only when the following

Standard sensitivity 10 mm/mV ±2%

Common mode rejection ratio 100 dB or more

Frequency response 0.05 to 150 Hz –3 dB or more

Waveform data processor

Sample rate 500 samples/s (input unit: 8,000 samples/s)

AC line filter 50/60 Hz

High-cut filter 75, 100, 150 Hz

EMG filter 25/35 Hz

Time constant 3.2 s or more

Waveform status detection Electrode detachment (polarization voltage),

1. GENERAL

specified patient cable is connected

Patient cable: BJ-901D, BJ-902D, BJ-903D, BA-901D, BA-903D

Noise (high frequency)

LCD (monochrome with CCFT backlight) (for ECG-9130K/P, ECG-9132K only)

Size 5.6 inch

Number of dots 320 × 240

ECG waveform 2.8 seconds simultaneous 12 lead ECG waveforms

Displayed data Waveform, patient information, recording settings,

operation mode, heart rate, QRS sync mark, error message,

electrode detachment, noise, patient information, hospital name

Recorder

Printing method High resolution thermal printer head

Printing density 200 dpi (8 dots/mm)

Scanning line density 1 ms

2 ms at paper speed 50 mm/s

Recording width 210 mm

Number of recording channels 3, 4, 6, 12

Sensitivity selection 1.25*, 2.5*, 5, 10, 20 mm/mV

*Automatically selected in automatic recording only

Paper speed 5, 10, 12.5, 25, 50 mm/s

Printed data Program type, version, date and time, paper speed, sensitivity,

lead name, filter, hospital name**, patient information**,

timing mark, event mark, electrode detachment, noise,

RESET mark*

*Printed only when ECG-9110K is used

**Printed only when ECG-9130K is used

Mechanical noise 48 dB or less at paper speed 25 mm/s

Service Manual ECG-9110/9130 Rev B 1.3

1. GENERAL

External input/output

External input 10 mm/0.5 V ±5%, input impedance 100 kΩ or more, 2 channel

Signal output 0.5 V/1 mV ±10%, output impedance 100 Ω or less

Serial I/O Communication method: RS-232C

Baud rate: 2400, 4800, 9600, 19200, 38400,

57600, 115200

Power requirement

Line voltage 100 to 127V, 220 to 240V AC ±10%

Line frequency 50 or 60 Hz

Power input Up to 150 VA

Power consumption 60 W or less

Built-in battery Voltage: 12 V

(LCT-1912ANK) Current consumption: 8 A or less

Battery operation time: Approx. 30 minutes

Environment

Operating temperature 10 to 40°C (50 to 104 F)

Operating humidity 25 to 90% RH

Operating atmospheric pressure 70 to 106 kPa

Storage duration and temperature 2 weeks or less: −20 to 60°C (−4 to 140 F)

(Depends on the battery) Between 2 weeks and one year: −15 to 40°C (5 to 104 F)

Over one year: −15 to 25°C (5 to 77 F)

Storage humidity 15 to 95% RH (non condensing)

Storage atmospheric pressure 70 to 106 kPa

Recording paper storage temperature −20 to 50°C (−4 to 122 F)

Recording paper storage humidity 25 to 80% RH

Electromagnetic compatibility IEC60601-1-2

CISPR11 Second Edition 1990-1999 Group 1 Class B

Other Indoor portable

Dimensions and weight

Dimensions 240 W × 104 H × 324 D mm (excluding protrusions)

Weight ECG-9110K: Approx. 3.8 kg (without battery)

ECG-9130K: Approx. 4.2 kg (without battery)

ECG-9130P: Approx. 4.2 kg (without battery)

ECG-9132K: Approx. 4.2 kg (without battery)

1.4 Service Manual ECG-9110/9130 Rev B

1. GENERAL

Safety

Safety standard:

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

IEC 60601-2-25 (1993), IEC 60601-2-25 Amendment 1 (1999)

Type of protection against electric shock:

AC power: Class I

Battery power: Internally powered equipment

Degree of protection against electric shock:

Defibrillator proof type CF applied part when patient cable BJ-901D, BJ-902D or BJ-903D is

used

Degree of protection against harmful ingress of water:

Ordinary equipment

Degree of safety of application in the presence of a flammable anaesthetic mixture with air, oxygen

or nitrous oxide:

Not suitable for use in the presence of a flammable anaesthetic mixture with air, oxygen or

nitrous oxide

Mode of operation:

Continuous

Performance

Performance standard: IEC 60601-2-51 (2003)

Service Manual ECG-9110/9130 Rev B 1.5

1. GENERAL

Panel Description

ECG-9110K Electrocardiograph

Magazine

Top Panel

QRS sync lamp

Electrode detachment indicator

Operation panel

1.6 Service Manual ECG-9110/9130 Rev B

Operation Panel

1. GENERAL

11 12 1413

546

15 16

732

Name

1. POWER key

2. Battery charge lamp

3. Battery operation lamp

4. AC power lamp

5. PERIODIC key/lamp

6. RHYTHM key/lamp

7. AGE key/lamp

8. SPEED key/lamp

9. GAIN key/lamp

10. LEAD keys/lamp

11. RESET key

12. FEED/MARK key

13. FILTER key/lamp

14. COPY/CAL key/lamp

15. START/STOP key/lamp

16. AUTO/MANUAL key/lamp

Service Manual ECG-9110/9130 Rev B 1.7

1. GENERAL

Right Side Panel

For the mark, refer to the descriptions for the Right Side Panel in Section 1

“Panel Descriptions” of the ECG-9110K Operator’s Manual.

Battery Pack LCT-1912ANK

(

)

12v 1.9Ah

Name

17. Patient input connector

18. EXT-IN 1, 2 connector

19. CRO-OUT connector

20. SIO connector

21. Battery compartment

22. Equipotential ground terminal

23. AC power cord socket

2017 18

Left Side Panel

24 25

Name

24. Magazine

25. Magazine release button

1.8 Service Manual ECG-9110/9130 Rev B

1. GENERAL

ECG-9130K/P Electrocardiograph

Magazine

Top View

LCD screen

ENTER

ECG-9130K

SHIFT

ALT

XYZ

SPACE

HIJ

Operation panel

The keyswithes on the ECG-9130P have a name label instead of the symbol.

Service Manual ECG-9110/9130 Rev B 1.9

1. GENERAL

Operation Panel

SHIFT

ALT

SPACE

ENTER

119108

Name

1. POWER key/lamp

2. Battery charge lamp

3. Battery operation lamp

4. AC power lamp

5. F1, F2, F3 function keys

6. MODE key

7. Keyboard

8. RHYTHM key/lamp

9. FEED/MARK key

10. FILTER key/lamp

11. COPY/CAL key/lamp

12. START/STOP key/lamp

13. AUTO/MANUAL key/lamp

ECG-9130K

1.10 Service Manual ECG-9110/9130 Rev B

1. GENERAL

Right Side Panel

For the mark, refer to the descriptions for the Right Side Panel in Section 1

“Panel Descriptions” of the ECG-9130K or 9130P Operator’s Manual.

Battery Pack LCT-1912ANK

(

12v 1.9Ah

)

16 1817

Name

14. Patient input connector

15. EXT-IN 1, 2 connector

16. CRO-OUT connector

17. SIO connector

18. Memory card slot

19. Battery compartment

20. Equipotential ground terminal

21. AC power cord socket

Left Side Panel

Name

22. Magazine

23. Magazine release button

Service Manual ECG-9110/9130 Rev B 1.11

1. GENERAL

ECG-9132K Electrocardiograph

Magazine

Top View

LCD screen

ENTER

ECG-9132K

SHIFT

ALT

2 3 4 5 6 7

XYZ

DEF G HIJ K

SPACE

8 9 0

Operation panel

The keyswithes on the ECG-9130P have a name label instead of the symbol.

1.12 Service Manual ECG-9110/9130 Rev B

Operation Panel

1. GENERAL

2 3 4 5 6 7

SHIFT

ALT

F G H

SPACE

8 9 0

J K

ENTER

119108

Name

1. POWER key/lamp

2. Battery charge lamp

3. Battery operation lamp

4. AC power lamp

5. F1, F2, F3 function keys

6. MODE key

7. Keyboard

8. RHYTHM key/lamp

9. FEED/MARK key

10. FILTER key/lamp

11. COPY/CAL key/lamp

12. START/STOP key/lamp

13. AUTO/MANUAL key/lamp

ECG-9132K

Service Manual ECG-9110/9130 Rev B 1.13

1. GENERAL

Right Side Panel

For the mark, refer to the descriptions for the Right Side Panel in Section 1

“Panel Descriptions” of the ECG-9132K Operator’s Manual.

Battery Pack LCT-1912ANK

(

12v 1.9Ah

)

16 1817

Name

14. Patient input connector

15. EXT-IN 1, 2 connector

16. CRO-OUT connector

17. SIO connector

18. Memory card slot

19. Battery compartment

20. Equipotential ground terminal

21. AC power cord socket

Left Side Panel

Name

22. Magazine

23. Magazine release button

1.14 Service Manual ECG-9110/9130 Rev B

Composition

ECG-9110K Electrocardiograph

1. GENERAL

ECG-9110K

RK-0011 Bottom Casing Assy

RK-0012 Internal Parts

GC-0012 Motor Assy

RH-0002 Magazine Assy

RK-0013 Thermal Head Assy

RK-0014 Battery Terminal Assy

RK-0015 PAPER SENSOR Board Assy

RK-0010 ECG-9100K Top Casing Assy

UT-2369 Key Board

SC-904D Power Unit

UT-235851 ECG Control Board

UT-23572 Flash ROM Board

(Option)

KC-010A Cart

KD-010A Cart

KD-104E Cart

KH-801E Patient Cable Hanger

DI-002A Pater Tray for KD-010A

DI-003A Mechano Cardiograph AMP tray

for KC-010A/JD-010A

• To order a replacement assembly above, use the Code No.

• To order a replacement component inside an assembly, refer to “Section 8

Replaceable Parts List”.

Service Manual ECG-9110/9130 Rev B 1.15

1. GENERAL

ECG-9130K Electrocardiograph

ECG-9130K

RK-0011 Bottom Casing Assy

RK-0012 Internal Parts

GC-0012 Motor Assy

RH-0002 Magazine Assy

RK-0013 Thermal Head Assy

RK-0014 Battery Terminal Assy

RK-0015 PAPER SENSOR Board Assy

RK-0017 ECG-9130K Top Casing Assy

UT-2367 Key Board

VL-0002 LCD Assy

(Option)

UT-2368 LCD CN Board

SC-904D Power Unit

UT-2358 ECG Control Board

UT-23572 Flash ROM Board

KC-010A Cart

KD-010A Cart

KD-104E Cart

KH-801E Patient Cable Hanger

DI-002A Pater Tray for KD-010A

DI-003A Mechano Cardiograph AMP tray

for KC-010A/JD-010A

• To order a replacement assembly above, use the Code No.

• To order a replacement component inside an assembly, refer to “Section 8

Replaceable Parts List”.

1.16 Service Manual ECG-9110/9130 Rev B

ECG-9130P Electrocardiograph

1. GENERAL

ECG-9130P

RK-0011 Bottom Casing Assy

RK-0012 Internal Parts

GC-0012 Motor Assy

RH-0002 Magazine Assy

RK-0013 Thermal Head Assy

RK-0014 Battery Terminal Assy

RK-0015 PAPER SENSOR Board Assy

RK-0038 ECG-9130P Top Casing Assy

UT-2367 Key Board

VL-0002 LCD Assy

(Option)

UT-2368 LCD CN Board

SC-904D Power Unit

UT-23584 ECG Control Board

UT-23575 Flash ROM Board

KC-010A Cart

KD-010A Cart

KD-104E Cart

KH-801E Patient Cable Hanger

DI-002A Pater Tray for KD-010A

DI-003A Mechano Cardiograph AMP tray

for KC-010A/JD-010A

• To order a replacement assembly above, use the Code No.

• To order a replacement component inside an assembly, refer to “Section 8

Replaceable Parts List”.

Service Manual ECG-9110/9130 Rev B 1.17

1. GENERAL

ECG-9132K Electrocardiograph

ECG-9132K

RK-0011 Bottom Casing Assy

RK-0012 Internal Parts

GC-0012 Motor Assy

RH-0002 Magazine Assy

RK-0013 Thermal Head Assy

RK-0014 Battery Terminal Assy

RK-0015 PAPER SENSOR Board Assy

RK-0060 ECG-9132K Top Casing Assy

UT-2367 Key Board

VL-0002 LCD Assy

(Option)

UT-2368 LCD CN Board

SC-904D Power Unit

UT-23585 ECG Control Board

UT-2357E Flash ROM Board

KC-010A Cart

KD-010A Cart

KD-104E Cart

KH-801E Patient Cable Hanger

DI-002A Pater Tray for KD-010A

DI-003A Mechano Cardiograph AMP tray

for KC-010A/JD-010A

• To order a replacement assembly above, use the Code No.

• To order a replacement component inside an assembly, refer to “Section 8

Replaceable Parts List”.

1.18 Service Manual ECG-9110/9130 Rev B

Location

1. GENERAL

Motor Assy

PAPER SENSOR Board Assy

Battery Terminal Assy

Thermal Head Assy

Speaker Assy

KEY Board

LCD Assy*

INVERTER Board*

LCD CN Board*

Power Unit

ECG CONTROL Board

* for ECG-9130K/9130P/9132K only

Service Manual ECG-9110/9130 Rev B 1.19

1. GENERAL

Block Diagram

NOTE

The sheet key, LCD module, LCD CN board, INVERTER board and KEY

board are used for the ECG-9130K, ECG-9130P and ECG-9132K only.

Sheet Key

CNJ014

CNJ013

KEY Board

CNJ012

CNJ011

INVERTER Board

CRO OUTPUT

EXT INPUT2

EXT INPUT1

RS232C

PC CARD

ECG INPUT

CNJ041

CNJ112

for writing FPGA

CNJ042

ECG CONTROL

CNJ043

CNJ101

CNJ111

Floating area

CNJ091

CNJ021

CNJ011

FLASH ROM Board

CNJ033

Board

CNA106

CNJ035

CNJ004

POWER Board

CNJ121

CNJ032

CNJ102

CNJ103

CNJ011

CNA403

CNJ001

CNJ002

CNA104

CNA105

CNA102

CNA103

CNA101

Paper Sensor

Thermal Head

Temperature sensor

CNA402

CNA201

CNJ012

CNJ011 CNJ013

LCD CN

Board

Speaker

Motor Assy

Battery

LCD

CNJ003

CNA401

1.20 Service Manual ECG-9110/9130 Rev B

Connection Diagram

Index NK Code No. Description Remarks

101 51021-0500 L=60 102 547597A DF11-18DS-2C/51021-05 14 L=140

103 547588A DF11-16DS-2C/51021-1500 L=250 Not contain ferrite.* 104 547579A PHR-11/51021-1400 L=100 Not contain ferrite.* 105 547632 DF11-20DS-2C L=50

201 Directly attached to LCD 202 Directly attached to LCD.

203 547561A DF11-6DS-2C L=55 204 205 Directly attached to power unit 206 547623 DF-11-6DS-2C L=140 207 547614A EHR-6 L=95 208 547605 50-8B-04D/DF11-4DS-2C L=60 209 Directly attached to power unit

Not contain ferrite.*

1. GENERAL

301 Ground lead 302 Ground lead 303 Ground lead 304 Ground lead

* The following is the description with reagard to the ferrites used in the instrument.

NK Code No. Description

*1 550851 TFC-16-8-16 *2 442077 SFC-4

*3 550102 FPC-25-12

103

303

304

104

206

301

201

101

202

102

203

302

204

207

208

209

205

105

Service Manual ECG-9110/9130 Rev B 1.21

Section 2 Maintenance

Replacement...................................................................................................................... 2.1

Periodic Replacement Schedule.............................................................................. 2.1

Cleaning and Greasing ...................................................................................................... 2.2

Cleaning and Greasing Schedules .......................................................................... 2.2

Cleaning the Thermal Head..................................................................................... 2.2

Cleaning the Paper Mark Sensor and Paper Empty Sensor .................................... 2.3

Cleaning the Motor Rotation Sensor and Greasing the Motor Gear and

Gear Meshed with Motor Gear ........................................................................... 2.4

Service Manual ECG-9110/9130 Rev A 2C.1

Replacement

2. MAINTENANCE

This section describes the periodic replacement and cleaning of parts which are required to maintain the instrument in good working condition.

This subsection only describes replacement schedule for parts that need to be periodically replaced. The actual replacement procedures are described in the section for Disassembly and Assembly. Read the whole “Disassembly and Assembly” section, especially its Warnings and Cautions, before replacing any of the parts described here.

Periodic Replacement Schedule

To maintain the performance of the instrument, the parts listed in the table below must be periodically replaced by qualified service personnel.

Part NK Code No. Description Recommendation

LCT-1912ANK 332543B Battery * See below. KTJ-216-8MPF1-NK 357035 Thermal head After 30 km of

recording LM32019T 545946 LCD Module After 10000 hours Motor ASSY GC-0012 Motor ASSY After 1000 hours BR2032/1F2 390765 Lithium battery** See below.

* Replace the battery when it cannot last for 15 minutes during battery operation at the temperatures between 20 and30°C.

** Replace the lithium battery on the ECG CONTROL board when the No. 08 or 09 system error message appears or after the lithium battery is used for 7 years. The life time of the battery is 7 years.

Service Manual ECG-9110/9130 Rev A 2.1

2. MAINTENANCE

Cleaning and Greasing

This subsection describes the cleaning and greasing procedures for parts that must be cleaned and greased by qualified service personnel. The cleaning procedures for parts that can be cleaned by the user are described in the Operator’s Manual.

Cleaning and Greasing Schedules

Cleaning the Thermal Head

To maintain the performance of the instrument, the parts listed in the table below must be regularly cleaned or greased.

Part Frequency Performed by

Instrument (external) After each use User Thermal Head Once a month User Platen Roller assy Once a year User Paper Mark Detection Sensor Once a month Qualified service personnel Paper Empty Sensor Once a month Qualified service personnel Motor Sensor Once a year Qualified service personnel Motor Gear and Gear Once a year Qualified service personnel Meshed with Motor Gear

CAUTION

Before cleaning, turn the power off and disconnect the AC power cord from the instrument. Do not clean the thermal head just after recording because the head is still hot.

Before setting the recording paper, clean the thermal head with the thermal head cleaner. If the thermal head is dirty, printing quality is reduced.

When used for a log time, the thermal head may become dirty. If the thermal head surface is touched with a dirty hand or if the recording paper is contaminated with chlorides (CardioCream or physiological salt solution), these will be missing dots on the recording. In this case, the thermal head requires cleaning.

Wipe the head section (copper color) behind the paper cutter with the thermal head cleaner.

If the wheel gears are dirty, clean the gears with cotton moistened with alcohol.

2.2 Service Manual ECG-9110/9130 Rev A

2. MAINTENANCE

Cleaning the Paper Mark Sensor and Paper Empty Sensor

1. Remove the magazine. The illustration below shows the location of the paper

mark sensor and paper empty sensor.

2. Use a piece of cotton moistened with alcohol to clean both sensors.

Paper mark sensor

Paper empty sensor

Service Manual ECG-9110/9130 Rev A 2.3

2. MAINTENANCE

Cleaning the Motor Rotation Sensor and Greasing the Motor Gear and Gear Meshed with Motor Gear

1. Detach the top casing from the bottom casing as described in the “Disassembly and Assembly” section.

2. Remove the three screws holding the motor assy to the bottom casing and remove the motor assy.

3. Remove the two screws to expose the motor rotation sensor and photodiode.

Motor rotation sensor and photodiode

Motor gear

Gear meshed with motor gear

Motor assy

Bottom casing

4. Use a piece of cotton moistened with alcohol to clean the sensor and photodiode.

5. Use a brush to clean the holes in the worm assy.

6. Use EM-50L (NK code No. 547712) grease to grease the motor gear and the gear which directly meshes with the motor gear as shown below.

7. Reattach the MOTOR SENS board to the motor with the two screws.

8. Reattach the motor assy to the bottom casing with the two screws.

9. Reattach the top casing to the bottom casing as described in the “Disassembly and Assembly” section.

2.4 Service Manual ECG-9110/9130 Rev A

Section 3 T roubleshooting and

System Error Message

Troubleshooting Flowchart ................................................................................................. 3.1

T roub leshooting T a ble......................................................................................................... 3.4

Troubleshooting General Operation Problem........................................................... 3.4

Troubleshooting Recording Problem........................................................................ 3.6

System Error Message ...................................................................................................... 3.7

Service Manual ECG-9110/9130 Rev A 3C.1

This section describes how to troubleshoot the instrument, using the following:

Is there any response when any switch is pressed?

Check the cable connection to the CNJ121 connector on the ECG CONTROL board all cable connections on the LCD CN board.

The ECG CONTROL board is faulty.

The ECG CONTROL board is faulty. The INVERTER board is faulty.

The power LED is on but there is no LCD display.

Is the LCD backlight on?

Is the cable firmly connected to the CNJ121 connector on the ECG CONTROL board?

Yes

The LCD unit is faulty.

Normal

Yes

- flowchart

- troubleshooting table

- system error messages at power-up

Troubleshooting Flowc hart

Use the troubleshooting flowchart to find the possible sources of a problem.

Troubleshooting Flowchart

<ECG-9130K only>

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Service Manual ECG-9110/9130 Rev A 3.1

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

The power of the instrument does not turn on.

Does the instrument operate during AC power operation?

Yes

Does the LED of the AC power light?

The membrane key is faulty. The ECG CONTROL board is faulty. The POWER board is faulty.

The instrument does not operate during battery power operation.

Is the battery charged?

Yes

Charge the battery.

Check the cable connections to the CNJ033 and CNJ035 connectors on the ECG CONTROL board and the connector on the INVERTER board.

Normal

Check the F0102 battery fuse on the POWER board.

Normal

The POWER board is faulty.

Check the cable connection to the CN501 connector on the POWER board.

Normal

Is the F503 battery fuse on the POWER board blown?

The power unit is faulty.

Yes

Replace the F503 battery fuse on the POWER board.

3.2 Service Manual ECG-9110/9130 Rev A

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

The recorder does not feed the recording paper when the START/STOP key is pressed.

Does the LED for the START key light up?

Does the recorder print when the recording paper is manually pulled out from under the thermal head?

Check the cable connection to the CNJ103 connector on the ECG CONTROL board.

The motor is faulty. The ECG CONTROL board is faulty.

Does the recorder print in manual mode?

Does the paper empty mark blink?

The ECG CONTROL board is faulty.

Normal

Check the cable connection to the CNJ103 connector on the ECG CONTROL board.

The ECG CONTROL board is faulty. The paper mark sensor is faulty.

Yes

Normal

Yes

Normal

Service Manual ECG-9110/9130 Rev A 3.3

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Troubleshooting T able

Use the troubleshooting table to locate, identify and solve a problem in the instrument. The problems are divided into general operation and recording. Each category has its own troubleshooting table for fast and easy troubleshooting.

How to use the troubleshooting table

1. Determine which troubleshooting table to use.

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

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

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

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

dealer.

Troubleshooting General Operation Problem

Problem Possible Cause/Criteria Action

The powe r LED li ghts but there is no display or backlight on the LCD screen.

The instr ument does not operat e on AC power.

The instr ument does not operat e on bat tery pow er.

Faul ty con nect ion to the CNJ 121 connector on the ECG CONT R O L bo a r d.

Faulty INVERTER b oard. Replace the INVERTER bo ard.

Fa ul ty LC D mo dul e .

Blown F011 or F012 power uni t fuse.

Faulty connection to the CN033 or CNJ035 connector on the ECG CONT R O L bo a r d.

Damaged power cord. Replace the power cord. Faulty power unit. Replace the power unit. Faulty ECG CONTROL board. Replac e the EC G CONTROL board.

Faulty KEY b oard. Replace the K EY board. The batter y is not cha rged. Charge t he batt ery.

Blown F051 battery fuse. Replace the F051 ba tter y fu se.

Check the connection to the CNJ121 connector on the E CG CONTROL board.

Replace the LCD modul e. Replace the F011 or F012 power unit

fuse. Check the connection to the CNJ033

and CNJ035 connector on the ECG CONT R O L bo a r d.

Damaged battery. Replace the battery. Faul ty con nect ion to the CNJ 033

or CNJ035 connector on the ECG CONTROL board or the CN201 or CN501 connecto r on the power unit.

3.4 Service Manual ECG-9110/9130 Rev A

Check the connection to the CNJ033 and CNJ035 connector on the ECG CONTROL board and the CN201 and CN501 connector on the power unit.

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Problem

Possible Cause/ Criteria

Ac ti on

No key operat ion. Damaged memb rane key. Replace the membrane key.

Faulty connection to the CNJ033 connector on the EC G CONTROL board.

Check the connection to t he CNJ033 connector on the ECG CONTR OL board.

Fau lty E C G CO NTR OL b o ar d. Rep lac e th e E C G CO NT R OL

board.

Only certai n electr ode l ead waveforms are di splayed on the screen or noise appears on the waveform.

The electrodes or cabl es connections from the patient to the instrument is not properly connected.

Make sure that al elect rodes and cables connection fro m the patient to the in strum ent are pr oper ly connected.

Fau lty E C G CO NTR OL b o ar d. Rep lac e th e E C G CO NT R OL

board.

No electrode lead waveforms are displayed on the screen or noise

Electrodes not attached to t he patient.

Make sure that the electrodes are properly att ached to t he p atient.

appears on all waveforms.

Fau lty E C G CO NTR OL b o ar d. Rep lac e th e E C G CO NT R OL

board.

Vertical a nd hori zontal s trips appear on the LCD screen a t constant intervals.

Faulty connection to the CNJ121 connector on the EC G CONTROL board.

Check the connection to t he CNJ121 connector on the ECG CONTR OL board.

Fau lty E C G CO NTR OL b o ar d. Rep lac e th e E C G CO NT R OL

board.

Faulty LCD uni t. Repl ace the LCD unit.

No sound. Check the connection to the

CNJ032 connector on the ECG CONTR OL board.

Faulty spea ker. R eplace t he spea ker assy.

Check the connection to t he CNJ032 connector on the ECG CONTR OL board.

Service Manual ECG-9110/9130 Rev A 3.5

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Troubleshooting Recording Problem

Problem

The recor der does not feed t he recording paper when the Star t switch is pre ssed.

The recordi ng paper i s fed but there is no pr inting.

Possible Cause/ Criteria

Dirty paper mark sens or. Clean the paper mark sens or.

Faulty connection to the CN J102 or CNJ103 connect or on the ECG CONTR OL board.

Faulty KEY bo ard. Replace the KEY bo ard. Faulty ECG CONTROL board. Replace the ECG CONTROL board. Faulty motor. Replace the motor. The thermal head is incor rectly

positioned. Faulty connection to the CN J011

connector on the E CG CONTROL board or the CN301 connector on the power uni t.

Faulty t hermal head. Replace t he t hermal head. Faulty power unit. Replace the power unit.

Check the connection to the CNJ102 and CNJ103 connector s on the ECG CONTR OL board.

Readjust the position of th e t hermal head.

Check the connection to the CNJ011 connector on the E CG CONTROL board and the CN301 connector on the power unit.

Ac ti on

The paper mark cannot be detected.

Sometimes the recorder does not print and b lank recording paper is fed from the recorder.

The recording paper tracks zigzag or to one side.

Faulty ECG CONTROL board. Replace the ECG CONTROL board. Dirty paper mark sens or. Clean the paper mark sens or.

Faulty connection to the CN J102 connector on the E CG CONTR OL board.

Faulty ECG CONTROL board. Replace the ECG CONTROL board. Faulty PAPER SENSOR board. Replace the PAPER SENSOR bo ard. The input prot ection circ uit which

protects the thermal head from strong noise like hum is reject ing noisy wa veforms.

Dirty th ermal head

The recordi ng pape r i s not properly set in the instrument.

The thermal head is incor rectly positioned.

Inaccura te or worn out plat en roller.

Check the connection to the CNJ102 connector on the E CG CONTROL board.

Check the electrode attachment to t he patient, and if necessary, re-position the el ectrodes so t hat a g ood ECG waveform is displ ayed.

Clean the thermal head.

Make sure that the r ecordi g pape r is aligned with the lower recording paper gui de

Readjust the position of th e t hermal head.

Replace the magazine assy.

3.6 Service Manual ECG-9110/9130 Rev A

System Error Message

During power-up and operation the instrument continuously checks itself for system failure. If a failure is detected, system information and error history are printed on the recording paper and all operations are stopped. System information and error history are also displayed (ECG-9130 only) or printed due to transient noise. After printing the system information and error history, the power of the instrument is automatically turned off.

If the same system information appears again after restarting the instrument, do not use the instrument until service per sonnel has corrected the cause of the problem. Sending a copy of the system information to your nearest Nihon Kohden distributor helps us to troubleshoot your problem quickly.

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

NOTE

System Information

Indicates an error number to identify the problem. To solve the problem, do the corrective action described below.

Er ro r No . M ean i ng

"00" Input unit error: An inte rrupt signal of 2 ms

is generated.

"01"

Input unit er ror: Ther e i s no response t o t he host.

"02"

Input unit error: Commu nication protocol error.

"03"

"04"

"05"

4 bit CPU error: Initialization error. R eplace the ECG CONTROL board. 4 bit CPU error: "No respons e" err or. Replace the ECG CONTROL board. A ke y on the operat on panel is short-

circuited.

"06"

"07"

"08"

RTC error: No i nterrupt si gnal of 125 m s. Replace the ECG CONTROL board. RTC error: I ncorrect data in S RAM. R eplace the EC G CONTROL board. All t he system se tup settings other t han t he

items descri bed in the following note a re re turned to th e fac tory ini tial se ttings . This is because the lithi um battery is replaced.

"09"

Lithi um batt ery is com plet ely discha rged. Repl ace the lithi um batt ery.

Correctiv e Action

Replace the ECG CONTROL board.

Replace the KEY board.

"Error 08" appears once aft er the lithi um batter y is r eplaced. Corrective action i s not required.

"10"

"11"

Bus error. Replace the ECG CONTROL board. Address err or. Replace the ECG CONTROL board.

Service Manual ECG-9110/9130 Rev A 3.7

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Error No. Meaning

"12"

"13"

"14"

"15"

Illegal command. Replace the ECG control board. Zero division error. Replace the ECG control board. Power off time out. Replace the ECG control board. EEPROM error: This occurs due to the

EEPROM check error, installed language error or communication error between the host and EEPROM.

"16"

"17"

"18"

"19"

Local language flash memory error. Replace the ECG control board. ECG model error. Replace the ECG control board. Local language is not installed. Install the local language. Local language is not installed. Install the local language. Error in memory area for local language. Re-install the local language.

"20"

Local language

text file

version does not

match the ECG software version.

"21"

"22"

ECG interpretation error (Time over). Check the input waveforms. If any noise is

The entered information does not match the data in the flash memory.

Correctiv e Action

Replace the ECG control board.

Install the local language

text file

which is

the same version as the ECG software.

superimposed on the waveforms, find and eliminate the cause. If no noi se is superimposed on the waveform, replace the ECG control board.

Replace the ECG control board.

NOTE

••

• “Error 05” also appears when any key on the operation panel is

••

pressed and held down.

••

• When “Error 08” appears, the following settings are not reset to

••

the factory initial settings even if the instrument is initialized.

- display language - hum filter

- hospital name - direct/modem connection

- recording resolution setting - cue mark position

- elapsed time - local language font

- saved ECG data

3.8 Service Manual ECG-9110/9130 Rev A

3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE

Error History

Indicates the latest three errors and the date of the latest error, as in the example below.

********** System Information **********

Error number: 1 5 Date: Apr 20, 1998 10:41 AM Program: 9130K Version: 01-00 01-01 01-01

********** Error History ********** No.1 Error number: 15 Apr 20, 1998 10:30 AM No.2 Error number: 15 No.3 Error number: 15

NIHON KOHDEN Mon Apr 20, 10:41 11 JST 1998

Service Manual ECG-9110/9130 Rev A 3.9

Section 4 System Test and Setting

System T est ....................................................................................................................... 4.1

Overall ..................................................................................................................... 4.1

Calling up the Test Level 1 ....................................................................................... 4.2

Calling up the Test Level 2 ....................................................................................... 4.3

Entering the System Test Number ........................................................................... 4.4

Executing the System Test....................................................................................... 4.5

Quitting the System Test.......................................................................................... 4.6

Exiting the System Test Mode .................................................................................. 4.6

Demonstration ................................................................................................................... 4.7

Recorder ............................................................................................................................ 4.8

Thermal Head .................................................................................................................. 4.11

Key ................................................................................................................................... 4.12

Memory............................................................................................................................ 4.13

Single Memory Test Mode ..................................................................................... 4.14

Continuous Memory Test Mode ............................................................................. 4.14

LCD/LED.......................................................................................................................... 4.15

Input Unit ......................................................................................................................... 4.17

Calibration........................................................................................................................ 4.18

Communication................................................................................................................ 4.19

CRO/EXT1 & CRO/EXT2................................................................................................. 4.21

System Setup Initialization............................................................................................... 4.23

ECG Findings List Recording........................................................................................... 4.24

Recording Resolution Setting .......................................................................................... 4.25

Cue Mark Adjustment ...................................................................................................... 4.26

Date and Time Setting ..................................................................................................... 4.28

Setting the Date and Time ..................................................................................... 4.28

Service Manual ECG-9110/9130 Rev A 4C.1

System Test

4. SYSTEM TEST AND SETTING

This section describes:

• how to check the operation of the instrument in the System Test mode.

• how to output the ECG findings list in the System Test mode.

• how to initialize the system in the System Test mode.

• how to adjust the thermal head recording resolution and recording paper cutting

position in the System Test mode.

• how to set date and time in the System Setup mode.

Overall

The instrument has two System Test modes: Test level 1 for operator and Test level 2 for qualified service personnel. The test items marked with * perform the

same test in Test levels 1 and 2. Each Test level consists of the following system test items:

Test level 1 Test level 2

• Demonstration • Recorder

• Recorder • Thermal head

• Key* • Recording resolution setting

• Memory* • Key*

• LCD/LED*

(1)

• Memory (single)*

• Input unit* • Memory (continuous)

• Calibration* • LCD/LED*

(1)

• Communication* • Input unit*

• CRO/EXT1* • Calibration*

• CRO/EXT2* • Communication*

• System Setup Initialization* • CRO/EXT1*

• ECG Findings List Recording • CRO/EXT2*

• System Setup Initialization*

• Cue mark adjustment

(1)

LCD is checked for the ECG-9130K only.

NOTE

In the description of some test items in this section, whenever it is appropriate, a description of the source of problem and its corrective action will be described in table form for fast and easy troubleshooting. If none of the actions solve the problem, contact your Nihon Kohden representative.

Service Manual ECG-9110/9130 Rev A 4.1

4. SYSTEM TEST AND SETTING

Calling up the Test Level 1 1. If the power is on, turn it off.

Release the FEED/MARK key immediately after the instrument starts printing. If y ou continue to hold the FEED/MARK key for more than 15 seconds, the instrument recognizes that the FEED/MARK key is short-circuited and prints the system information “Error 05” at the end of printing.

2. Press the POWER key while pressing the FEED/MARK key. Hold the FEED/ MARK key until the instrument begins to print the system test procedure, relationship between the input number and its corresponding key name on the operation panel and system test number list as shown below. The Test level 1 is called up and the instrument is in standby mode for entering the system test number. (The System Test screen appears for the ECG-9130K only as shown below.)

To cancel printing the following information, press the START/STOP key.

NOTE

The only difference between the ECG-9110K and ECG-9130K printouts is the description of the key explanation.

Printout (ECG-9130K)

System Test 1:

To check system, press system test number, then press START/STOP key.

To quit the test, press AUTO/MANUAL key.

Key Explanation 0: 0 1: 1 2: 2 3: 3 4: 4 5: 5 6: 6 7: 7 8: 8 9: 9

Test level 1 Demonstration [00] Recorder [01] Key [02] Memory [03] LCD/LED [04] Input unit [05] Calibration [06] Communication [07] CRO/EXT1 [08] CRO/EXT2 [09] System Setup Initialization [10] ECG Findings List Recording [11]

Sytem T est Screen (ECG-9130K)

4.2 Service Manual ECG-9110/9130 Rev A

Calling up the T est Level 2 1. If the power is on, turn it off.

2. Press the POWER key while pressing the FEED/MARK and AUTO/MANUAL keys together. Hold the FEED/MARK and AUTO/MANUAL keys until the instrument begins to print the system test procedure, relationship between the input number and its corresponding key name on the operation panel and system test number list as shown below. The Test level 2 is called up and the instrument is in standby mode for entering the system test number. (The System Test screen appears for the ECG-9130K only as shown in the previous page.)

4. SYSTEM TEST AND SETTING

NOTE

To cancel printing the following information, press the START/STOP key.

The only difference between the ECG-9110K and ECG-9130K printouts is the description of the key explanation.

Printout (ECG-9130K)

System Test 1:

To check system, press system test number, then press START/STOP key.

To quit the test, press AUTO/MANUAL key.

Key Explanation 0: 0 1: 1 2: 2 3: 3 4: 4 5: 5 6: 6 7: 7 8: 8 9: 9

Test level 2 Recorder [00] Thermal head [01] Recording resolution setting [02] Key [03] Memory (single) [04] Memory (continuous) [05] LCD/LED [06] Input unit [07] Calibration [08] Communication [09] CRO/EXT1 [10] CRO/EXT2 [11] System Setup Initialization [12] Cue mark adjustment (−4.0 mm) [13] Cue mark adjustment (−3.5 mm) [14] Cue mark adjustment (−3.0 mm) [15] Cue mark adjustment (−2.5 mm) [16] Cue mark adjustment (−2.0 mm) [17] Cue mark adjustment (−1.5 mm) [18] Cue mark adjustment (−1.0 mm) [19] Cue mark adjustment (−0.5 mm) [20] Cue mark adjustment ( 0 mm) [21] Cue mark adjustment (−0.5 mm) [22] Cue mark adjustment (−1.0 mm) [23] Cue mark adjustment (−1.5 mm) [24] Cue mark adjustment (−2.0 mm) [25] Cue mark adjustment (−2.5 mm) [26] Cue mark adjustment (−3.0 mm) [27] Cue mark adjustment (−3.5 mm) [28] Reset elapsed time [31] Font Down Load (RS-232C) [32] Font Down Load (PC CARD) [33] Flash memory initialization [34]

Service Manual ECG-9110/9130 Rev A 4.3

4. SYSTEM TEST AND SETTING

Entering the System Test Number

Use the following keys on the operation panel to enter a 2-digit number for executing the desired system test.

• ECG-9110K: Refer to ECG-9110K keys and corresponding number values

shown below.

• ECG-9130K: Use the number keys. The specified system test numbers are indicated in the [xx] bracket at the right of each system test item on the printout when the Test level 1 or 2 is called up. Refer to the “Calling up the Test Level X” section.

To delete the entered number, press the AUTO/MANUAL key. To delete a 2-digit number, press the AUTO/MANUAL key twice. At this time, the ones digit number is deleted before the tens digit number is deleted.

ECG-9110K Keys and Corresponding Number Values

Number Key Number Key

0 EXTRA key 5 ×1/2 (5 mm/mV) GAIN key 1 5, 10. 12.5 mm/s SPEED key 6 ×1 (10 mm/mV) GAIN key 2 25 mm/s SPEED key 7 ×2 (20 mm/mV) GAIN key 3 50 mm/s SPEED key 8 LEAD key (left) 4 ×1/4 (2.5 mm/mV) GAIN key 9 LEAD key (right)

ECG-9110K operation panel

123 4 5 6 7 8 9 0

4.4 Service Manual ECG-9110/9130 Rev A

4. SYSTEM TEST AND SETTING

Executing the System Test

Press the START/STOP key. For some tests, the System Test screen is displayed during the test as shown below (ECG-9130K only).

System T est Screen (ECG-9130K)

If you entered an unspecified number, an alarm occurs. The alarm indication is different between the ECG-9110K and ECG-9130K as follows:

• ECG-9110K: 8 repeating “pips” alarm sound is generated.

• ECG-9130K: 8 repeating “pips” alarm sound and the “Invalid number.

Please re-enter number” error message is displayed as shown below.

To re-enter the system test number, do either of the folowing:

• Delete the previously entered number by pressing the AUTO/MANUAL key.

• Enter the system test number by overwriting the previously entered number.

Service Manual ECG-9110/9130 Rev A 4.5

4. SYSTEM TEST AND SETTING

Quitting the System Test The procedures to quit each system test vary from test to test. Some tests

automatically end after an alarm sound is generated or a printout is output. Refer to the following explanations for each test. After quitting each test, the instrument returns to the standby mode for entering the system test number.

After a system test is completed, you can execute other system test without exiting the System Test mode .

Exiting the System Test Mode

After all desired system tests are finished, press the POWER key.

4.6 Service Manual ECG-9110/9130 Rev A

Demonstration

4. SYSTEM TEST AND SETTING

This is used to learn or teach instrument operation.

While executing this test item, the instrument generates dummy 12 lead ECG resting waveforms until the power of the instrument is turned off. The ECG waveforms can be recorded and also displayed as shown below (ECG-9130K only).

Procedure

Enter the system test number [00] (Test level 1) and press the START/STOP key.

To quit the test, turn the power of the instrument off by pressing the POWER key.

Dummy 12 lead ECG resting waveforms on LCD

Service Manual ECG-9110/9130 Rev A 4.7

4. SYSTEM TEST AND SETTING

Recorder

This is used to check the condition of the recorder by printing test patterns. The recording test patterns consist of the following and are printed in the following order:

1. Diagonal lines

2. Characters H and X (Test level 1 only)

3. Grid

4. Paper speed scales (10, 12.5, 25 and 50 mm/s)

5. Paper mark detection

The recorder test of Test level 1 contains the same recorder test and thermal head test as Test level 2. With regard to the check procedure for characters H and X, refer to the “Thermal Head” section.

Procedure

Enter the system test number [01] (Test level 1) or [00] (Test level 2) and press the START/STOP key. The following test patterns are printed.

This test automatically ends after the folowing has been printed. The instrument returns to the standby mode for entering the system test number.

Printout of Test level 1

Not printed in Test le vel 2. Refer to the “Thermal Head” section for this check.

Paper mark

Small rectangle printed when the paper mark is detected.

4.8 Service Manual ECG-9110/9130 Rev A

4. SYSTEM TEST AND SETTING

Check Procedure for Diagonal Lines

Check that all the diagonal lines are evenly and completely printed.

Possible Sour ce of Proble m

A dirty thermal head can cause some parts to be u nevenly o r incom plete ly print ed.

1.2.Clean t he t hermal h ead wit h the t hermal head cl eaner pen.

Corrective Action

If this does not fix the problem, replace the thermal head.

A faulty thermal head can cause some parts at a certain position to be unevenly or incom plet ely print ed.

1.2.Clean t he t hermal h ead wit h the t hermal head cl eaner pen. If this does not fix the problem, replace the thermal head.

Check Procedure f or Grid

Check that all the parts of the grid are clearly, evenly and completely printed.

Possible Source of Problem

A faulty ECG CONTROL board can c ause

Replace the ECG CONTROL bo ard.

Correctiv e Action

all or som e parts to be unclear, une venly or incom plet ely print ed.

Check Procedure for Paper Speed Scales

Check that the accuracy of each paper speed during actual recording is within 5%. The scales for 4 seconds at 10 mm/s and 12.5 mm/s paper speeds and the scales for 2 seconds at 25 mm/s and 50 mm/s paper speeds are consecutively printed. For example, the length for 4 seconds on the time scale printed at 10 mm/s paper speed must be within 38.0 mm to 42.0 mm.

Possible Sour ce of Proble m

Corrective Action

Badly positioned t hermal head. 1.2.Adjust t he thermal head po sition.

If this does not fix the problem, replace the thermal head.

Damaged, deformed or badl y pos itioned moto r g ea r.

1.2.Check the motor gear and its po sit ion. If this does not fix the problem, replace the motor ge ar.

Dirty motor rot ation sens or. Clean the motor rotation s ensor as

described in the "Maintena nce" sect ion.

Loose or damaged axle. Tighten and check the axle as described

in the "Disassembly and Assembly" section.

Faulty motor. Replace the mot or. Faulty

EC G CONT ROL b oard . Rep la ce th e E CG CONT ROL boa rd.

Service Manual ECG-9110/9130 Rev A 4.9

4. SYSTEM TEST AND SETTING

Check Procedure for Paper Mark Detection

In one complete recorder test, a small rectangle is printed near each paper mark if the paper mark is correctly detected by the mark sensor. (Refer to “Cleaning and Greasing” in Section 2 for the location of the mark sensor.) Check that a small rectangle is printed before each paper mark on the second and third pages only.

Possible Source of Problem

If the paper mark is not occasionally detected, the paper mar k s ensor is dirty.

If the paper mark is not detected at all, the PAPER SENSOR board is faul ty.

Clean t he paper m ark sensor as described in the "Maintena nce" sect ion.

Replace the PAPER SENSOR board.

Corrective Action

About paper mark Every page of recording paper has a paper mark at the lower right corner. Pages are divided by broken lines. In the automatic recording, the recording stops after the paper mark is detected by the mark sensor. This enables the next printing to start from the beginning of the next page.

Broken line

Paper f eed direction

Small rectangle

Paper mark

4.10 Service Manual ECG-9110/9130 Rev A

Thermal Head

4. SYSTEM TEST AND SETTING

This is used to check the condition of the thermal head by printing out the characters “H” and “X” continually.

Procedure

Enter the system test number [01] (Test level 2) and press the START/STOP key. The characters “H” and “X” are printed as follows.

To quit the test, press the AUTO/MANUAL key and the instrument returns to the standby mode for entering the system test number.

Printout of Thermal Head Test Result

H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX H XXXXX

Check Procedure for Characters H and X

Check that all the parts of the characters “H” and “X” are clearly, evenly and completely printed and that the characters are not printed zigzag or diagonally.

Possible Source of Problem

Incorr ectly set t hermal head record ing resolution setting.

Faulty cable connection to the CNJ011 connector on the ECG CONTROL board or the CN301 connec tor on t he power uni t.

Adju st the ther mal head record ing res olut ion as des cribed i n this section.

Check the cab le connecti ons to the CNJ011 connector o n the EC G CONTROL board and the CN301 connec tor on t he power uni t.

Corr ect iv e Ac ti on

Faulty power unit. Replace t he power unit. Badly positioned recorder compone nt. Check a nd adjust the recorder component

position.

Service Manual ECG-9110/9130 Rev A 4.11

4. SYSTEM TEST AND SETTING

Key

This is used to check the condition of the keys on the operation panel.

Procedure

1. Enter the system test number [02] (Test level 1) or [03] (Test level 2) and press the START/STOP key.

2. Press the key on the operation panel. The name of the pressed key is printed if the key is functioning correctly.

To quit the test, press the AUTO/MANUAL key. The instrument returns to the standby mode for entering the system test number.

NOTE

The POWER and AUTO/MANUAL keys cannot be checked by this test. To check if these two keys are functioning correctly, do the f ollowing:

••

• POWER key

••

Check that the power of the instrument is on or off when the POWER key is turned on or off.

••

• AUTO/MANUAL key

••

Check that the Key test is stopped by pressing the AUTO/MANUAL key.

Check Procedure for Operation Panel Key

Check that the name of the pressed key is printed.

Possible Source of Problem

Faulty KEY board. Replace the K EY board.

Cor rect iv e Ac ti on

4.12 Service Manual ECG-9110/9130 Rev A

Memory

4. SYSTEM TEST AND SETTING

This is used to check the condition of the memory by comparing the data of the test patterns written to and read from each memory area.

The instrument provides two memory test modes: single and continuous. When single memory test mode is selected, entire memory is tested once. When continuous memory test mode is selected, the memory is continuously tested until the AUTO/MANUAL key is pressed. The number of “Count of test” increases by one each time the entire memory test is tested. One complete memory test takes about 30 seconds.

If no fault is detected, an “OK” message appears for each memory. If a fault is detected, an “Error” message appears and the number of “Error count” for each memory increases by one.

Printout of Memory Test Result

Memory test result (Count of test: 1) Main memory (BIT/ADR) OK 0

Recorder memory (BIT/ADR) Error (E88004/000000h) 1 VRAM (BIT/ADR) Error (C10000h/C10004h) 1 Program ROM OK 0 Flash memory NONE 0 Input unit SRAM Error 1 Input unit ROM OK 0 Input unit EEPROM OK 0 File memory Error 1 RTC SRAM OK 0

Hospital NIHON KOHDEN HOSPITAL Model 9130K Version 01-05 Input unit version 01-01 Analysis version 01-03 Date Oct 16, 1998 10:41 AM Cardiograph internal temp 46.5 C Elapsed time 9 hours Thermal head temperature 27.0 C Battery voltage 12.4 V

Error count

Service Manual ECG-9110/9130 Rev A 4.13

4. SYSTEM TEST AND SETTING

Single Memory Test Mode This mode tests the entire memory once. You can use this mode to fully check all

memory if a memory problem frequently occurs.

Procedure

Enter the system test number [03] (Test level 1) or [04] (Test level 2) and press the START/STOP key.

After the test, the test result and system setup settings are automatically printed. When the test result and system setup settings are completely printed, a “bing bong” alarm sound is generated and instrument returns to the standby mode for entering the system test number.

To cancel the test or cancel printing the test result and system setup settings, press the AU TO/MANUAL key .

Check Procedure f or Single Memory Test Mode

Check that no “Error” messages appear.

Continuous Memory T est Mode

Possible Source of Problem

Faulty memory on the ECG CONTROL board.

Replace the ECG CONTROL board. Each memory mounted on the ECG CONTROL board cannot be repl aced at memory component level.

Cor rect iv e Ac ti on

This mode continues testing the entire memory until the AUTO/MANUAL key is pressed. You can use this mode to check an intermittent memory problem.

Procedure

Enter the system test number [05] (Test level 2) and press the START/STOP key.

To print the test result and system setup settings without quitting the test, press the START/STOP key. All results of the tests performed until the START/STOP key are pressed is printed on one page.

To cancel the test, press the AUTO/MANUAL key. All results of the tests performed until the START/STOP key is pressed are printed on one page. When the test result and system setup settings are completely printed, 8 repeating “pips” alarm sound is generated and the instrument returns to the standby mode for entering the system test number.

Check Procedure f or Continuous Memory Test Mode

Check that no “Error” messages appear.

Possible Source of Problem

Faulty memory on the ECG CONTROL board.

Replace the ECG CONTROL board. Each memory mounted on the ECG CONTROL board cannot be repl aced at memory component level.

Cor rect iv e Ac ti on

4.14 Service Manual ECG-9110/9130 Rev A

LCD/LED

4. SYSTEM TEST AND SETTING

This is used to check all LEDs on the operation panel, LED/LCD control circuit and all dots on the LCD (ECG-9130K only). First, the LCD test starts and after the LCD test is complete, the LED test starts. The LCD test is not performed for the ECG-9110K.

LCD Test (ECG-9130K onl y)

The LCD displays the following four types of test patterns every two seconds in the following order:

1. Diagonal lines are displayed.

2. Entire LCD lights up.

3. LCD is completely dark but backlight lights.

4. Backlight does not light. The LCD image for each pattern changes as follow:

LED T est

The LEDs on the operation panel light up by one and remain lit until all LEDs light up. After all LEDs light up, they go out at a time.

NOTE

With regard to the LEDs of Battery charge lamp, AC power lamp and POWER lamp, check if they are in the following condition during the LED/LCD test:

••

• Battery charge lamp: Not lit (This lamp indicates the remaining

••

battery power before and after the LED test during battery operation.)

••

• AC power lamp: Lit

••

• POWER lamp: Lit when AC power is used

••

Service Manual ECG-9110/9130 Rev A 4.15

4. SYSTEM TEST AND SETTING

Procedure

Enter the system test number [04] (Test level 1) or [06] (Test level 2) and press the START/STOP key.

After the test, the instrument returns to the standby mode for entering the system test number.

To cancel the test, press the AUTO/MANUAL key.

Check Procedure for LCD Test

Check that all the dots on the screen light up and go out according to the test pattern.

Possible Source of Problem Corrective Action

Faulty cable connection to the CNJ121 or CNJ013 connector on the ECG CONTROL board.

Check the cab le connections to the CNJ121 and CNJ013 connector s on the ECG CONTROL bo ard.

Faulty LCD module. Repl ace the LCD module. Faulty ECG CONTROL board. Replace the EC G CONTROL board.

Check Procedure for LED Test

Check that all the LEDs on the operation panel light up.

Possible Sou rce of Problem

Faulty cable connection to the CNJ121 or CNJ013 connector on the ECG CONTROL board.

Check the cab le connections to the CNJ121 and CNJ013 connector s on the ECG CONTROL bo ard.

Cor rect iv e Acti on

Faulty KEY board. Replace the K EY board. Faulty ECG CONTROL board. Replace the EC G CONTROL board.

4.16 Service Manual ECG-9110/9130 Rev A

Input Unit

4. SYSTEM TEST AND SETTING

This is used to check if the input analog signal processing circuit detects the lead off condition correctly, using the provided input check jig. If each lead is connected when the input analog signal processing circuit works correctly, the “Normal” message is printed at the right of each electrode lead name in the test result. If a lead is not connected, the “Error” message is printed.

The following is an example printout of the input unit test result when the R(RA) lead is disconnected.

Input unit test result RF (RL) Normal

R (RA) Error L (LA) Normal F (LL) Normal C1 Normal C2 Normal C3 Normal C4 Normal C5 Normal C6 Normal

Input check jig

Procedure

1. Connect the electrode lead to the instrument.

2. Attach all tips of each electrode lead to the input check jig.

3. Enter the system test number [05] (Test level 1) or [07] (Test level 2).

4. Disconnect one of the leads from the check jig and press the START/STOP key. The disconnected lead name is printed out.

5. Repeat steps 3 and 4 for all leads by one.

To quit the test, press the AUTO/MANUALl key. The instrument returns to the stanby mode for entering the system test number.

Check Procedure f or Input Unit Test

Check that the lead off condition is detected correctly.

Possible Source of Problem

Corr ect iv e Ac ti on

Fa ulty E C G CO NT R OL b o a rd . R e pl ac e the E C G CO NT R OL b oa rd . Faulty input chec k j ig. Replace the input chec k j ig.

Service Manual ECG-9110/9130 Rev A 4.17

4. SYSTEM TEST AND SETTING

Calibration

This is used to check the sensitivity and time constant of the input analog signal processing circuit. After starting the test, the CAL waveforms for leads I, II and V1 to V6 are printed as shown below. If all the rectangular printed CAL waveforms have the amplitude of 1 mV and time constant of more than 3.2 seconds, the sensitivity and time constant of the input analog signal processing circuit are normal.

Input check jig

Procedure

1. Connect the electrode lead to the instrument.

2. Attach all tips of each electrode lead to the input check jig.

3. Enter the system test number [06] (Test level 1) or [08] (Test level 2) and press the START/STOP key.

After all CAL waveforms for eight leads are printed, the test automatically ends and the instrument returns to the standby mode for entering the system test number.

To cancel the test, press the START/STOP key or AUTO/MANUAL key. The instrument returns to the standby mode for entering the system test number.

Check Procedure for Calibration W aveforms

Check that all the rectangular printed CAL waveforms match the following conditions in the illustration below:

• Amplitude when CAL waveform is risen: 10 mm±2%

• Amplitude of point which is 25 mm: more than 7.3 mm

from the rising point of the CAL waveform

10 mm±2%

25 mm

Possible Source of Problem

Faulty ECG CONTROL board. Replace the EC G CONTROL board.

4.18 Service Manual ECG-9110/9130 Rev A

more than 7.3 mm

Cor rect iv e Ac ti on

Communication

4. SYSTEM TEST AND SETTING

This is used to check the external communication input/output line of the instrument, using the check jig. The instrument has one standard communication connector (SIO). This test is performed by comparing the original test patterns sent from the output line with the test patterns received at the input line. If any received test pattern is different from its original, a “Error” message is printed. A “Normal” message is printed if the communication line is normal. With regard to TxD-RxD line, if the same data is printed, the line is normal.

Every time the test of one set is repeated, the number of “Count of test” increases by one. Every time the error is detected during continuous test, the “Error count” increases by one. The test of one set takes about 5 seconds.

The following is an example printout of the communication test result.

Communication test result (Count of test: 1 )

DTR-DSR: Normal RTS-CTS: Normal TxD: 00 RxD: 00

Hospital NIHON KOHDEN HOSPITAL Model 9130K Version 01-05 Input unit version 01-01 Analysis version 01-03 Date Oct 16, 1998 10:41 AM Cardiograph internal temp 37.0 C

Error count

Preparation

A locally made check jig is required for the test. To make the check jig, short-ciruit the pins as shown below.

Connector Pin Assigment

1. FG

2. TXD

3. RXD

4. RTS

5. CTS

6. DSR

7. GND

8. HS

9. DTR

Mating Connector

Connector: HDEB-9PF (05) Case: HDE-CTH

Service Manual ECG-9110/9130 Rev A 4.19

4. SYSTEM TEST AND SETTING

Procedure

1. Connect the check jig to the SIO socket of the instrument.

2. Enter the system test number [07] (Test level 1) or [09] (Test level 2) and press

the START/STOP key.

The instrument prints the test result of each test if the instrument detects an “Error”.

To print the test result without quiting the test, press the START/STOP key. The results of all tests performed until the START/STOP key are pressed are printed. You can see the number of tests and the number of errors on “Count of test” and “Error count” on the printout, respectively.

To quit the test, press the AUTO/MANUAL key. The instrument prints the results of all tests performed until the AUTO/MANUAL key is pressed. When the test result is completely printed, 8 repeating “pips” sound is generated and the instrument returns to the standby mode for entering the system test number.

Check Procedure for Serial Communication

Check that no error messages appear.

Possible Source of Problem

Faulty ECG CONTROL board. Replace the EC G CONTROL board.

Cor rect iv e Ac ti on

4.20 Service Manual ECG-9110/9130 Rev A

CRO/EXT1 & CRO/EXT2

This is used to check the external output/input terminal, using the check jig. The instrument has two input signal terminals (EXT-IN connector) and the output signal terminal (CRO-OUT connector) at the rear of the instrument.

In this test, the instrument prints the known triangular waveform signals generated inside the instrument at the lower trace on the recording paper the moment the instrument outputs the signals from the CRO-OUT terminal to the EXT-IN connector. At the same time, the instrument prints the triangular waveform signals input to the EXT-IN connector at the upper trace on the recording paper. There is no delay time between the printed waveforms on the upper and lower traces.

The following is an example printout of the CRO/EXT1 test result.

4. SYSTEM TEST AND SETTING

Preparation

A locally made check jig is required for the test. To make the check jig, use the two 3.5φ monaural jacks and leads and solder the signal line and ground line of the two jacks with leads as shown below.

Signal line

Ground line

Service Manual ECG-9110/9130 Rev A 4.21

4. SYSTEM TEST AND SETTING

Procedure

1. Connect the check jig to the CRO-OUT/EXT-IN sockets of the instrument.

2. To check the signal line between the CRO-OUT and EXT-IN1, enter the system

test number [08] (Test level 1) or [10] (Test level 2) and press the START/STOP key.

To check the signal line between the CRO-OUT and EXT-IN2, enter the system test number [09] (Test level 1) or [11] (Test level 2) and press the START/STOP key.

To quit the test, press the START/STOP key or AUTO/MANUAL key. The instrument returns to the standby mode for entering the systme test number.

Check Procedure

Check that the shape of the two printed triangular waveforms are the same and there is no delay time between them.

Possible Source of Problem

Cor rectiv e Action

Faulty ECG CONTROL board. Replace the EC G CONTROL board.

4.22 Service Manual ECG-9110/9130 Rev A

System Setup Initialization

This is used to reset all the system settings to the factory initial settings.

The following settings are not reset to the factory initial settings even if the instrument is initialized.

••

• date and time*

••

• recording resolution setting*

••

• cue mark position*

••

• elapsed time

••

• saved ECG data

••

For settings marked with *, refer to the f o llowing corresponding subsection in this section; for settings marked with **, refer to “Changing Settings Before Measurement (System Setup Screen)” in the ECG-9110K/9130K operator’s man ual.

4. SYSTEM TEST AND SETTING

NOTE

••

• display language**

••

• hospital name**

••

• direct/modem connection**

••

• local language font

••

Procedure

Enter the system test number [10] (Test level 1) or [12] (Test level 2) and press the START/ST OP ke y.

If the initialization is completed, the folloing occurs:

• ECG-9110K: One “bing bong” alarm sound is generated and the instrument

returns to the stanby mode for entering the system test number.

• ECG-9130K: A “System Setup Initialization” message appears with one “bing

bong” alarm sound and the instrument returns to the stanby mode for entering the system test number.

Refer to the ECG-9110K/9130K operator’s manual for the factory initial settings.

Following is the LCD display after the system has been initialized.

Service Manual ECG-9110/9130 Rev A 4.23

4. SYSTEM TEST AND SETTING

ECG Findings List Recording

This is used to print out the list of all ECG findings used for the instrument. The instrument informs you of the ECG finding as a result of the ECG interpretation when analyzing the ECG.

Procedure

Enter the system test number [11] (Test level 1) and press the START/STOP key.

When the list is completely printed, one “bing bong” alarm sound is generated and the instrument returns to the standby mode for entering the system test number.

To cancel printing the list, press the START/STOP key or AUTO/MANUAL key. The instrument returns to the standby mode for entering the system test number.

4.24 Service Manual ECG-9110/9130 Rev A

Recording Resolution Setting

This is used to adjust the thermal head recording resolution after the thermal head is replaced with a new one or when the printout is not clearly, evenly and completely printed.

Normally, the resistor value of the heating element on the thermal head is a specific value which varies from thermal head to thermal head. Even if the same energy is applied to the thermal head, the recording quality varies due to the difference of the thermal head resistor value. Therefore, adjusting the thermal head recording resolution is required to evenly print regardless of the thermal head resistor value.

Do the following procedure to automatically adjust the thermal head recording resolution.

Procedure

Enter the system test number [02] (Test level 2) and press the START/STOP key.

4. SYSTEM TEST AND SETTING

After adjustment is completed, the instrument prints out the test result as shown below and returns to the stanby mode for entering the system test number.

A number of 1 to 8 is printed at the right of “Thermal head level” if the thermal head resolution is adjusted correctly. An “Error” is printed when it is necessary that the thermal head is replaced with a new one.

The following is an example printout of the Recording Resolution Setting system test.

Thermal head level: 4

Service Manual ECG-9110/9130 Rev A 4.25

4. SYSTEM TEST AND SETTING

Cue Mark Adjustment

This is used to adjust the distance (mm) between the broken line on the recording paper and paper cutting part on the top casing so that the paper can be just cut at the broken line. The ideal adjustment is that the broken line on the paper lines up with the cutting part on the top casing when cutting the paper.

Procedure

1. Enter the system test number [21] (Test mode 2) and press the START/STOP

key to verify the distance between the broken line on the paper and the paper cutting part. The instrument feeds the recording paper with the “Cue mark adjustment (0.0 mm)” message and stops feeding it after a paper mark is detected. The right edge of the paper mark against the paper feed direction lines up the broken line on the paper.

2. Put the paper to the paper cutting part as if the paper was cut as shown below.

If the broken line lines up the paper cutting part, you do not have to perform this adjustment. If there is a deviation between the broken line and paper cutting part, go to step 3.

Paper cutting part

Broken line

Paper f eed direction

3. Mark the point where the paper is at the paper cutting part.

4. Measure the distance (mm) between the broken line and marked point.

Measure distance.

Paper f eed direction

Apply “+” to measured value.

Apply “−” to measured value.

Paper mark

Marked point

Broken line Paper mark

5. Apply the plus symbol “+” to the measured value when the marked point is

before the broken line against the paper feed direction or minus symbol “−” to the measured number when the marked point is behind the broken line. The resulting value is recognized as the adjustment value.

4.26 Service Manual ECG-9110/9130 Rev A

4. SYSTEM TEST AND SETTING

The following is a list of the relationship between the adjustment value and its corresponding system test number you should execute.

System Test Adjustment System Test Adjustment No. Value (mm) No. Value (mm)

[13] − 4.0 [21] 0.0 [14] − 3.5 [22] + 0.5 [15] − 3.0 [23] + 1.0 [16] − 2.5 [24] + 1.5 [17] − 2.0 [25] + 2.0 [18] − 1.5 [26] + 2.5 [19] − 1.0 [27] + 3.0 [20] − 0.5 [28] + 3.5

6. Enter the appropriate system test number [xx] and press the START/STOP key. The “Cue mark adjustment [xxx mm]” message is printed and the instrument returns to the standby mode for entering the system test number. The adjustment is completed.

7. Verify that the broken line on the paper lines up with the cutting part on the top casing.

Service Manual ECG-9110/9130 Rev A 4.27

4. SYSTEM TEST AND SETTING

Date and Time Setting

The date and time of the instrument are set in the System Setup mode. In the System Setup mode, you can also set the entire system settings of the instrument which determines the operation conditions of the instrument. Refer to the ECG9110K/9130K operator’s manual for details.

This setting is necessary when the back-up battery (lithium battery) is completely or almost completely discharged or replaced with a new one. The life time of the back-up battery is about 7 years. You can note whether the back-up battery is completely or almost discharged by the system error message. Refer to the “System Error Message” section in Section 3.

Setting the Date and Time

1. Call up the System Setup mode

1) If the power is on, turn it off.

NOTE

2) Press the POWER key while pressing the COPY/CAL key. Hold the COPY/ CAL key until the instrument begins to print the list of the system setup settings. The System Setup mode is called up.

To cancel printing the list, press the START/STOP key.

2. Enter a 3-digit number to call up the stanby mode for entering the new numbers for year, month/date, hour/minute or second, respectively. Refer to the “Entering the System Test Number” in this section for entering the numbers.

Following is the LCD screen when the year setting mode is called up.

4.28 Service Manual ECG-9110/9130 Rev A

4. SYSTEM TEST AND SETTING

Year

Enter the system setup number [318].

Month/date

Enter the system setup number [319].

Hour/minute

Enter the system setup number [320].

Second

Enter the system setup number [322].

To cancel the entered number, press the AUTO/MANUAL key.

NOTE

You cannot enter numbers for “second” setting.

3. Enter a 4-digit number to enter the new numbers of the year, month/date or hour/minite. The range of the number which is possible to enter is as follows:

Year

[1980] to [2079]

Month/date

[0101] to [1231]

Hour/minute

[0000] to [2359]

To cancel the entered number, press the AUTO/MANUAL key.

Following is the LCD screen when the year “1998” is entered.

Service Manual ECG-9110/9130 Rev A 4.29

4. SYSTEM TEST AND SETTING

NOTE

• When the START/STOP key is pressed in the “second” setting mode,

the second is reset to “00” seconds and the instrument starts working from “00” seconds.

• If the power of the instrument is turned off before the START/STOP

key is pressed, the newly entered numbers are invalid.

4. Press the START/STOP key to save the new numbers. The newly entered numbers are automatically printed.

Following is the LCD screen when year “1998” is saved.

If you entered an unspecified number, an alarm occurs. The alarm indication is different between the ECG-9110K and ECG-9130K as follows:

• ECG-9110K: 8 repeating “pips” alarm sound is generated.

• ECG-9130K: 8 repeating “pips” alarm sound and the “Invalid number.

Please re-enter number” error message is displayed.

To re-enter the system test number, do either of the folowing:

• Delete the previously entered number by pressing the AUTO/MANUAL key.

• Enter the system test number by overwriting the previously entered

number.

5. Repeat steps 2 to 4 to enter the new numbers for the other setting.

6. Turn the power of the instrument off to exit the System Setup mode.

4.30 Service Manual ECG-9110/9130 Rev A

Section 5 Board/Unit Description

Block Diagram.................................................................................................................... 5.1

Po wer Unit.......................................................................................................................... 5.2

ECG CONTROL Board...................................................................................................... 5.2

FLASH ROM Board ........................................................................................................... 5.3

INVERTER Board .............................................................................................................. 5.3

Service Manual ECG-9110/9130 Rev A 5C.1

Block Diagram

5. BOARD/UNIT DESCRIPTION

NOTE

The sheet key, KEY board, LCD module, LCD CN board and INVERTER board are used for the ECG-9130K onl y.

Sheet Key

CNJ014

CNJ013

KEY Board

CNJ012

CNJ011

INVERTER Board

CRO OUTPUT

EXT INPUT2

EXT INPUT1

RS232C

PC CARD

ECG INPUT

CNJ041

CNJ112

for writing FPGA

CNJ042

ECG CONTROL

CNJ043

CNJ101

CNJ111

Floating area

CNJ091

CNJ021

CNJ011

FLASH ROM Board

CNJ033

Board

CNA106

CNJ035

CNJ004

POWER Board

CNJ121

CNJ032

CNJ102

CNJ103

CNJ011

CNA403

CNJ001

CNJ002

CNA104

CNA105

CNA102

CNA103

CNA101

Paper Sensor

Thermal Head

Temperature sensor

CNA402

CNA201

CNJ012

CNJ011 CNJ013

LCD CN

Board

Speaker

Motor Assy

Battery

LCD

CNJ003

CNA401

Service Manual ECG-9110/9130 Rev A 5.1

5. BOARD/UNIT DESCRIPTION

Po wer Unit

ECG CONTROL Board

The power unit consists of the power source, battery charging and control circuits. The power unit uses the switching regulation method to produce the power required for the instrument.

The ECG CONTROL board consists of the following components:

Component Description

CPU: MC68EC020 (Operating frequency: 25 MHz) ROM: For system software, 2 MB DRAM: Main memory, 1 MB Flash memory: For font of local language, 1 MB

For filing data, 256 KB Real time clock: For monitoring back-up battery, built-in 140 B SRAM Timer: 1 ms timer

Interrupt request signal ON/OFF: selectable

Operation mode: fixed Serial interface: Equivelent to RS-232C, 1 channel

Baud rate: 2,400 to 115,200 bps selectable Speaker circuit: Beep sound, Sound by noise generator Interrupt request: Auto-vector method Interface: To ECG input section Recorder: 8 dots/mm LCD: 320 × 240 dots Controller: For keyboard A/D converter: 8,000 samples/s, 10 bits

5.2 Service Manual ECG-9110/9130 Rev A

FLASH ROM Board

INVERTER Board

5. BOARD/UNIT DESCRIPTION

The FLASH ROM board has a 2 MB flash ROM for writing the control program, analysis program, Japanese font and English font to the ROM. Also, there is a space for mounting an EEPROM.

The INVERTER board produces the power for the LCD backlight module using +12 VDC power from the power unit, and turns on/off the power of the instrument according to the signal from the ECG CONTROL board.

Service Manual ECG-9110/9130 Rev A 5.3

Section 6 Disassembly and

Assembly

Before You Begin ................................................................................................................ 6.1

Warnings and Cautions ........................................................................................... 6.1

Required T ools ......................................................................................................... 6.1

Board and Unit Location .......................................................................................... 6.2

Cable Connection .................................................................................................... 6.3

Removing the Top Casing Assy ......................................................................................... 6.4

Removing the ECG CONTROL Board............................................................................... 6.5

Removing the Po wer Unit and POWER Board................................................................... 6.6

Replacing the Thermistor......................................................................................... 6.7

Removing the Thermal Head ............................................................................................. 6.8

Removing the Thermal Head Only........................................................................... 6.8

Removing the Thermal Head with the Thermal Head Bracket,

Thermal Head Spring and Thermal Head Axle ........................................................ 6.9

Removing the Motor Assy................................................................................................ 6.10

Removing the Speaker Assy............................................................................................ 6.11

Removing the PAPER SENSOR Board Assy................................................................... 6.12

Removing the Recorder Base.......................................................................................... 6.13

Removing the Battery Terminal Assy ............................................................................... 6.14

Removing the Magazine Assy ......................................................................................... 6.15

Removing the LCD Assy, INVERTER Board and LCD CN Board.................................... 6.16

Removing the LCD Assy........................................................................................ 6.16

Removing the INVERTER Board ........................................................................... 6.17

Removing the LCD CN Board................................................................................ 6.17

Removing the Membrane Assy Film Cable and KEY Board ............................................ 6.18

Removing the Membrane Assy Film Cable and KEY Board .................................. 6.18

Replacing the Membrane Assy Film Cable............................................................ 6.19

Removing the Bottom Casing .......................................................................................... 6.20

Replacing the Fuse on the POWER Board ...................................................................... 6.21

Replacing the Lithium Battery on the ECG CONTROL Board ......................................... 6.22

Service Manual ECG-9110/9130 Rev A 6C.1

Before Y ou Begin

Warnings and Cautions

6. DISASSEMBLY AND ASSEMBLY

The procedures in this section tell how to remove, replace and install major components in the instrument.

Removing, replacing and installing major components should be done by qualified service personnel.

W ARNINGS

••

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

••

instrument, do not install or remove any component or change switch settings while the power is on and wait 10 minutes before installing to or removing any component from the instrument after the power is off.

••

• To avoid accidental discharge of static electricity which could

••

damage the instrument components, use a wrist ground strap when installing or removing any component of the instrument.

Required T ools

CAUTIONS

••

• Before connecting or disconnecting any cables, turn off the

••

instrument, unplug the AC power cord from the instrument and remove the rechargeable battery.

••

• Fuses cut off the power when an abnormality occurs in the

••

instrument. Eliminate the malfunction before replacing the fuse. Use the correct fuse only. The fuse rating is shown on the holder.

••

• Removal and replacement of any component in the instrument

••

should be done by qualified service personnel.

••

• Use only parts recommended by Nihon Kohden to assure maximum

••

performance from your instrument.

• Anti-static bench mat

• Wrist ground strap

• Phillips screwdriver (insulated type)

• Flat-blade screwdriver (insulated type)

• Hex (Allen) wrench or hex keys

• Hex driver

• Tweezers

Service Manual ECG-9110/9130 Rev A 6.1

6. DISASSEMBLY AND ASSEMBLY

Board and Unit Location

Speaker Assy

PAPAER SENSOR Board Assy

The following see-through diagram shows the location of the boards and units in the instrument.

See-through Diagram

Motor Assy

Thermal Head Assy

LCD Assy (for ECG-9130K only)

INVERTER Board (for ECG-9130K only)

LCD CN Board (for ECG-9130K only)

Power Unit

Battery Terminal Assy

KEY Board (for ECG-9130K only)

ECG CONTROL Board

6.2 Service Manual ECG-9110/9130 Rev A

6. DISASSEMBLY AND ASSEMBLY

Cable Connection

The following cable connection diagram shows the connection of the cables in the instrument. Refer to “Connection Diagram” in Section 1 for details with regard to each cable.

Cable Connection Diagram

301

201

302

101

202

206

207

104

208

304

209

303

205

103

102

203

204

105

Service Manual ECG-9110/9130 Rev A 6.3

6. DISASSEMBLY AND ASSEMBLY

Removing the Top Casing Assy

1. Turn off the instrument, unplug the AC power cord and remove the rechargeable battery.

2. Remove the four M3 pan head screws with spring washers from the bottom of the instrument.

M3 pan head screw with spring washer

CA UTION

When opening the top casing assy, be sure not to let the top casing assy fall off. Otherwise, the two cables which connect the following boards and the their connectors may be damaged.

••

• LCD CN board and ECG CONTROL board

••

• KEY board and ECG CONTROL board

••

3. Open the top casing assy in the dir ection of the arrow shown below. Be careful not to pull the cables between the top and bottom casings.

4. Disconnect the LCD CN board cable connector and KEY board cable connector from the ECG CONTROL board.

Top casing assy

KEY board

ECG CONTROL board

6.4 Service Manual ECG-9110/9130 Rev A

LCD CN board cable connector

cable connector

Removing the ECG CONTROL Board

Local language text is stored in the flash memory on the ECG CONTROL board. When the ECG CONTROL board is replaced, local language text is not available; only English text is available. To use the ECG with your own language after the ECG CONTROL board is replaced, you must reload the local language files to the ECG. Refer to the YZ-012H6 T ranslator Support Tool operator’s manual.

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” section.

2. Remove the nine M3 pan head screws with spring washers and M1 pan head screw with spring washer.

6. DISASSEMBLY AND ASSEMBLY

CA UTION

5. Remove the spacer bolt (L10).

6. Disconnect the following five connectors from the ECG CONTROL board.

• Motor cable connector

• POWER board cable connector

• Battery cable connector

• Speaker cable connector

• Thermal head cable connector

7. Lift off the ECG CONTROL board from the POWER board.

Speaker cable connector

Thermal head cable connector

Spacer bolt (L10)

Battery cable connector

POWER board cable connector

Motor cable connector

M1 pan head screw with spring washer

ECG CONTROL board

M3 pan head screw with spring washer

Service Manual ECG-9110/9130 Rev A 6.5

6. DISASSEMBLY AND ASSEMBLY

Removing the Power Unit and POWER Board

1. Remove the top casing as described in the “Removing the Top Casing Assy” section.

2. Remove the ECG CONTROL board as described in the “Removing the ECG CONTROL Board” section.

3. Remove the ground terminal assy.

4. Remove the five M3 pan head screws with spring washers holding the power unit to the bottom casing.

5. Remove the termistor cable from the termistor cable stopper and pull out the thermistor compartment.

Thermistor cable

Thermistor cable stopper

6. Lift off the power unit from the bottom casing in the direction of the arrow.

Thermistor compartment

M3 pan head screw with spring washer

Motor cable connector

Ground terminal assy

Thermistor seal

Thermistor

6.6 Service Manual ECG-9110/9130 Rev A

6. DISASSEMBLY AND ASSEMBLY

6. Remove the five M3 pan head screws with spring washers to seperate the POWER board from its shield base.

Replacing the Thermistor

POWER board

Thermistor

M3 pan head screw with spring washer

Shield base

CA UTION

To prevent incorrect temperature measurement, the thermistor must be positioned so that only the tip is just past the edge of the transparent thermistor seal.

1. Replace the thermistor so that only the tip of the termistor is just past the edge of the transparent thermistor seal.

Service Manual ECG-9110/9130 Rev A 6.7

6. DISASSEMBLY AND ASSEMBLY

Removing the Thermal Head

••

• Do not touch the surface of the thermal head with your bare hands.

••

This can cause some dots of the thermal head to malfunction. If you touch the surface of the thermal head, clean it with the provided thermal head cleaner pen or cotton moistened with alcohol.

••

• After replacing the thermal head, the following two adjustments are

••

required.

- Thermal head position. Refer to “Adjusting Thermal Head

- Recording resolution. Refer to “Recording Resolution Setting” in

CA UTION

Position” in Section 7.

Section 4.

Removing the Thermal Head Only

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” section.

2. Use a flat-blade screw driver to pry out the two thermal head springs from each thermal head spring stopper as shown in the expanded illustration below.

3. Remove the two pan head screws with spring washers holding the thermal head to the thermal head bracket.

4. Disconnect the two cables from the POWER board and ECG CONTROL board.

5. Pull out the thermal head.

M3 pan head screw with spring washer

Thermal head

Thermal head bracket

Cable from POWER board

Cable from ECG

Thermal head spring stopper

6.8 Service Manual ECG-9110/9130 Rev A

Thermal head axle attachment hole

Thermal head spring

Thermal head axle

CONTROL board

6. DISASSEMBLY AND ASSEMBLY

Removing the Thermal Head with the Thermal Head Bracket, Thermal Head Spring and Thermal Head Axle

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” section.

2. Use a flat-blade screw driver to pry out the two thermal head springs from the thermal head springs stopper as shown in the expanded illustration below.

3. Disconnect the two cables from the POWER board and ECG CONTROL board.

4. Push the thermal head axle in either direction of the two-way arrow shown in the previous page and lift off the one end of the thermal head axle from its attachment hole.

5. Lift off the other end of the thermal head axle from its attachment hole.

Service Manual ECG-9110/9130 Rev A 6.9

6. DISASSEMBLY AND ASSEMBLY

Removing the Motor Assy

1. Remove the top casing as described in the “Removing the Top Casing”

2. Remove the three M3 pan head screws with spring washers holding the

CA UTION

Adjusting the motor assy position is required when the motor assy is replaced. Refer to “Adjusting Backlash between Motor Gear and Platen Axle Assy Gear” in Section 7.

section.

motor assy to the bottom casing.

3. Disconnect the motor assy connector from the ECG CONTROL board.

4. Lift off the motor assy from the bottom casing.

M3 pan head screw with spring washer

Motor assy

Motor assy connector

6.10 Service Manual ECG-9110/9130 Rev A

Removing the Speaker Assy

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” section.

2. Remove the two M3 pan head screws with spring washers holding the speaker bracket to the recorder base.

3. Disconnect the speaker assy connector from the ECG CONTROL board.

6. DISASSEMBLY AND ASSEMBLY

M3 pan head screw with spring washer

Speaker

Speaker bracket

Speaker assy connector

Service Manual ECG-9110/9130 Rev A 6.11

6. DISASSEMBLY AND ASSEMBLY

Removing the PAPER SENSOR Board Assy

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” secion.

2. Remove the thermal head with the thermal head bracket, thermal head spring and thermal head axle as described in the “Removing the Thermal Head with the Thermal Head Bracket, Thermal Head Spring and Thermal Head Axle” section.

3. Disconnect the PAPER SENSOR board connector from the ECG CONTROL board.

4. Use a flat-blade screwdriver to pry out the pawl of the PAPER SENSOR board plate from the recorder base.

PAPER SENSOR board

5. Hold up the PAPER SENSOR board to make a space between the PAPER SENSOR board and recorder base so that the tip of the flat-blade screwdriver can be inserted in the space as shown below.

6. Move the flat-blade screwdriver in the direction of the arrow shown below to lift off the PAPER SENSOR board from the recorder base.

PAPER SENSOR board connector

Pawl of PAPER SENSOR board plate

6.12 Service Manual ECG-9110/9130 Rev A

Removing the Recorder Base

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” secion.

2. Remove the ECG CONTROL board as described in the “Removing the ECG CONTROL Board” section.

3. Remove the power unit as described in the “Removing the Power Unit and POWER Board” section.

4. Remove the thermal head with the thermal head bracket, thermal head spring and thermal head axle as described in the “Removing the Thermal Head with the Thermal Head Bracket, Thermal Head Spring and Thermal Head Axle” section.

6. DISASSEMBLY AND ASSEMBLY

5. Remove the two M3 pan head screws with spring washers holding the recorder base to the bottom casing.

6. Use a flat-blade screwdriver to pry out the three pawls of the recorder base from the bottom casing as shown in the expanded illustration below to separate the recorder assy from thebottom casing.

M3 pan head screw with spring washer

Recorder base

Service Manual ECG-9110/9130 Rev A 6.13

6. DISASSEMBLY AND ASSEMBLY

Removing the Battery Terminal Assy

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” secion.

3. Remove the motor assy as described in the “Removing the Motor Assy” section.

4. Remove the Motor assy as described in the “Removing the Motor Assy” section.

5. Remove the recorder base as described in the “Removing the Recorder Base” section.

6. Remove the two M3 pan head screws with spring washers holding the battery terminal assy to the bottom casing.

7. Remove the battery terminal assy cable connector from the POWER board.

8. Remove the two M3 pan head screws holding the battery terminal assy to the bottom casing.

9. Lift off the battery terminal assy from the bottom casing.

M3 pan head screw with spring washer

Battery terminal assy cable connector

Battery terminal assy

M3 pan head screw

6.14 Service Manual ECG-9110/9130 Rev A

Removing the Magazine Assy

Removal

Put the tip of the small flat-blade driver in the space between the E-ring and magazine chassis then push the E-ring in the direction of the smaller arrow and pull off the magazine assy in the direction of the bigger arrow.

E-ring

6. DISASSEMBLY AND ASSEMBLY

Replacement

Put the plastic magazine shaft into the attachment hole and put the metal magazine shaft with the E-ring and spring into the attachment hole while pressing and holding down the shaft in the direction of the smaller arrow.

Service Manual ECG-9110/9130 Rev A 6.15

6. DISASSEMBLY AND ASSEMBLY

Removing the LCD Assy, INVERTER Board and LCD CN Board

NOTE

This procedure is for the ECG-9130K only.

Removing the LCD Assy

1. Tilt the LCD with an angle of 45 degrees.

2. Remove the two M3 pan head screws with spring washers holding the LCD bottom casing to the LCD top casing assy.

3. Lift off the top casing assy from the bottom casing in the direction of the

M3 pan head screw with spring washer

LCD top casing assy

LCD bottom casing

45 degrees

4. Remove the three M3 pan head screws with spring washers holding the LCD chassis to the LCD bottom casing.

5. Remove the four M3 pan head screws with spring washers to separate the LCD and LCD chassis.

6. Disconnect the LCD film cable and LCD CN board cable from the LCD CN board.

6.16 Service Manual ECG-9110/9130 Rev A

6. DISASSEMBLY AND ASSEMBLY

M3 pan head screw with spring washer

LCD

LCD film cable

INVERTER board

LCD CN board

LCD chassis

LCD CN board cable

Removing the INVERTER Board

Removing the LCD CN Board

LCD bottom casing

1. Remove the M3 pan head screw holding the INVERTER board to the LCD chassis.

1. Remove the M3 pan head screw holding the LCD CN board to the LCD chassis.

Service Manual ECG-9110/9130 Rev A 6.17

6. DISASSEMBLY AND ASSEMBLY

Removing the Membrane Assy Film Cable and KEY Board

1. Remove the top casing assy as described in the “Removing the Top Casing Assy” secion.

Top casing assy

Membrane key

KEY board

KEY board connector

Membrane assy film cable

2. Release the locks at both edges of each kEY board connector in the direction of the black arrows with your fingers as shown to the left.

3. Pull out each membrane assy film cable from each kEY board connector in the direction of the white arrow as shown to the left.

4. Remove the six M3 pan head screws with spring washers holding the KEY board to the top casing assy.

6.18 Service Manual ECG-9110/9130 Rev A

Replacing the Membrane Assy Film Cable

6. DISASSEMBLY AND ASSEMBLY

CA UTION

Before each membrane assy film cable is connected to the connector on the KEY board, tilt each connector with about 20 degrees. Otherwise, each membrane assy film cable cannnot be sufficiently inserted into each innermost key board connector.

1. After the KEY board is replaced, tilt each KEY board connector about 20 degrees as shown to the left.

2. Insert each membrane assy film cable into the innermost KEY board connector and push down each key board connector to lock it as shown by the bigger arrow.

3. Push the locks at both edges of each KEY board connector in the direction of the two smaller arrows to lock it.

Service Manual ECG-9110/9130 Rev A 6.19

Nihon-Kohden TEC-9110, TEC-9130 Service manual

Specifications and Main Features

Frequently Asked Questions

User Manual