Nihon Koden ECG-9020K, ECG-9010K Service Manual

ECG- 9010K ECG- 9020K

SERVICE MANUAL

cardiofax GEM

ELECTROCARDIOGRAPH

ECG-9010K ECG-9020K

0634-001307A

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................................................................................................................ 1.5

ECG-9010K Electrocardiograph ............................................................................... 1.5

Top Vie w ......................................................................................................... 1.5

Operation Panel.............................................................................................. 1.6

Right Side Panel ............................................................................................. 1.7

ECG-9020K Electrocardiograph ............................................................................... 1.8

Top Vie w ......................................................................................................... 1.8

Operation Panel.............................................................................................. 1.9

Right Side Panel ........................................................................................... 1.10

Composition...................................................................................................................... 1.11

ECG-9010K Electrocardiograph ............................................................................. 1.11

ECG-9020K Electrocardiograph ............................................................................. 1.12

Location ............................................................................................................................ 1.13

Block Diagram...................................................................................................................1.14

Connection Diagram ......................................................................................................... 1.15

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

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

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

Cleaning.............................................................................................................................. 2.2

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

Cleaning the Paper Mark Sensor and Paper Empty Sensor..................................... 2.2

Cleaning the Motor Rotation Sensor and

Greasing the Motor Gear and Gear Meshed with Motor Gear.................................. 2.3

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

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

T roubleshooting Table.......................................................................................................... 3.4

Troubleshooting General Operation Prob lem............................................................ 3.4

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

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

Service Manual ECG-9010/9020 Rev A C.1

CONTENTS

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

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........................................................................................................................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

Pow er 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 Y ou 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 ................................................................................................... 6.4

Removing the LCD Assy..................................................................................................... 6.5

Removing the Thermal Head Assy ..................................................................................... 6.6

Removing the Motor Assy................................................................................................... 6.8

Removing the Speaker Assy............................................................................................... 6.9

C.2 Service Manual ECG-9010/9020 Rev A

CONTENTS

Removing the Inverter Board ............................................................................................ 6.10

Removing the ECG Control Board.................................................................................... 6.11

Removing the Po w er Unit.................................................................................................. 6.12

Replacing the Thermistor and Termistor Cable....................................................... 6.14

Removing the Battery Terminal Assy ................................................................................ 6.15

Removing the Magazine Assy .......................................................................................... 6.16

Removing the Bottom Casing ........................................................................................... 6.17

Replacing the Fuse on the Po wer Board........................................................................... 6.18

Replacing the Lithium Battery on the ECG Control Board ................................................ 6.19

Section 7 Replaceable Parts List...........................................................7C.1

General Parts List ............................................................................................................... 7.2

Top Casing Assy ................................................................................................................. 7.4

Top Casing Assy, RK-0007 for ECG-9010K.............................................................. 7.4

Top Casing Assy, RK-0009 for ECG-9020K.............................................................. 7.5

Thermal Head Assy , YZ-011H8........................................................................................... 7.6

Motor Assy, GC-0011.......................................................................................................... 7.7

Speaker Assy, RK-0005...................................................................................................... 7.8

Magazine Assy, RH-0001 ................................................................................................... 7.9

Battery T erminal Assy, RK-0006 ....................................................................................... 7.10

LCD Assy, VL-0001........................................................................................................... 7.11

Cart and Fixing Plate ........................................................................................................ 7.12

Patient Cab le Hanger........................................................................................................ 7.14

Section 8 Connector Pin Assignment ...................................................8C.1

Pow er Unit........................................................................................................................... 8.1

CN11 (to AC Inlet) .................................................................................................... 8.1

CN21 (to ECG control board) ................................................................................... 8.1

CN31 (to Thermal Head) .......................................................................................... 8.1

CN51 (to Battery)...................................................................................................... 8.1

ECG Control Board ............................................................................................................. 8.2

CNJ011 (to Thermal Head)....................................................................................... 8.2

CNJ012 (to Inverter Board)....................................................................................... 8.2

CNJ013 (to LCD) ...................................................................................................... 8.3

CNJ021 (to Flash ROM Board)................................................................................. 8.3

CNJ031 (to SIO Connector)...................................................................................... 8.5

CNJ032 (to Key Connector)...................................................................................... 8.5

CNJ033 (to Speaker) ................................................................................................ 8.6

CNJ035 (to Po wer Unit)............................................................................................ 8.7

CNJ036 (to Motor) .................................................................................................... 8.8

CNJ041 (to CRO Connector).................................................................................... 8.8

CNJ043 (to EXT INPUT Connector) ......................................................................... 8.8

CNJ091 (to ECG Connector) .................................................................................... 8.9

Flash ROM Board ............................................................................................................. 8.10

CNJ021 (to ECG Control Board) ............................................................................ 8.10

Service Manual ECG-9010/9020 Rev A C.3

CONTENTS

Inverter Board ................................................................................................................... 8.12

CN1 (to ECG Control Borad) .................................................................................. 8.12

CN2 (to LCD module) ............................................................................................. 8.12

External Input/Output Socket ............................................................................................ 8.13

SIO Socket.............................................................................................................. 8.13

EXT Input and CRO Output .................................................................................... 8.13

C.4 Service Manual ECG-9010/9020 Rev A

Conventions Used in this Manual and Instrument

Warnings, Cautions and Notes

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

WARNING

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

CAUTION

A caution alerts the user to possible injury or problems with the instrument associated with its use or misuse such as instrument malfunction, instrument failure, damage to the instrument, or damage to other property.

NOTE

A note provides specific inf ormation, in the form of recommendations, prerequirements, 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.

Service Manual ECG-9010/9020 Rev A i

Operation panel (for ECG-9010K onlly)

Alternating current

“On” only for a part of equipment

“Off” only for a part of equipment

Battery charging (lamp/on screen)

Battery check (lamp/on screen)

QRS sync lamp

Age

REST/PERIODIC recording

Paper speed

Gain

Paper feed

Mark

Filter

Copy

Calibration

START/STOP recording

Automatic control

Manual control

Operation panel (for ECG-9020K only)

Alternating current

“On” only for a part of equipment

“Off” only for a part of equipment

Battery charging (lamp/on screen)

Battery check (lamp/on screen)

Age

Sex

Mode

Rhythm

Paper feed

Filter

Copy

Calibration

START/ST OP recording

Automatic control

Mark

ii Service Manual ECG-9010/9020 Rev A

Manual control

Display (for ECG-9020K only)

QRS sync lamp

Patient cable

Attention, consult operator’s manual

Defibrillation-proof Type CF applied part

Service Manual ECG-9010/9020 Rev A iii

Section 1 General

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

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

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

Panel Description............................................................................................................... 1.5

ECG-9010K Electrocardiograph .............................................................................. 1.5

T op Vie w ........................................................................................................ 1.5

Operation Panel............................................................................................. 1.6

Right Side Panel ............................................................................................ 1.7

ECG-9020K Electrocardiograph .............................................................................. 1.8

T op Vie w ........................................................................................................ 1.8

Operation Panel............................................................................................. 1.9

Right Side Panel .......................................................................................... 1.10

Composition.....................................................................................................................1.11

ECG-9010K Electrocardiograph ............................................................................ 1.11

ECG-9020K Electrocardiograph ............................................................................ 1.12

Location ........................................................................................................................... 1.13

Block Diagram.................................................................................................................. 1.14

Connection Diagram ........................................................................................................ 1.15

Service Manual ECG-9010/9020 Rev A 1C.1

Introduction

1. GENERAL

This service manual provides useful information to qualified service personnel to understand, troubleshoot, service, maintain and repair the ECG-9010K/9020K Electrocardiograph (referred to as “the instrument” in this service manual).

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, Adjustment and Setting section in this service manual describes the maintenance that should be performed by qualified service personnel. The Maintenance section in the operator’s manual describes the maintenance that can be performed by the user.

The information in the operator’s manual is primarily for the user. However, it is important for service personnel to thoroughly read the operator’s manual and service manual before starting to troubleshoot, service, maintain or repair this instrument. This is because service personnel needs to understand the operation of the instrument in order to effectively use the information in the service manual.

Service Manual ECG-9010/9020 Rev A 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-9010/9020 Rev A

Specifications

ECG input

Input impedance 10 MΩ or more Electrode offset tolerance ±500 mV or more Input unit protection Isolated and defibrillator protected 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 pr ocessor

Sample rate 500 samples/s (input unit: 8,000 samples/s) AC line filter 50/60 Hz, OFF 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),

Sensitivity selection 5, 10 , 20 mm/mV

1. GENERAL

Noise (high frequency)

LCD (monochrome with CCFT backlight) (for ECG-9020K only)

Size 5.6 inch Number of dots 320 × 240 ECG waveform 3 channel:Real time 12 ECG lead complexes

6 channel: 2.5 s Rhythm lead: 10 s

Displayed data Waveform, patient information, recording settings,

operation mode, heart rate, QRS sync mark, error message, electrode detachment, noise

Recorder

Printing method High resolution thermal printer head Printing density 200 dpi (8 dots/mm) Scanning line density 1 ms Recording width 104 mm Number of recording channels 2, 3, 4, 6 Paper speed 10, 12.5, 25, 50 mm/s

(10 and 12.5 mm/s available for ECG-9020K only)

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

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

External input/output

External input 10 mm/0.5 V ±5%, input impedance 100 kΩ or more Signal output 0.5 V/1 mV ±5%, output impedance 100 Ω or less Serial I/O Communication method: RS-232C

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

57600, 115200

Service Manual ECG-9010/9020 Rev A 1.3

1. GENERAL

Power requirement

Line voltage 100 to 127 VAC, 220 to 240 VAC ±10% Line frequency 50 or 60 Hz Power input Up to 120 VA Power consumption 49 W or less

Built-in battery) Voltage: 12 V (LCT-1912ANK) Current consumption: 6A or less

Environment

Operating temperature 10 to 40°C Operating humidity 25 to 90% RH Operating atmospheric pressure 70 to 106 kPa

Storage duration and temperature 2 weeks or less: −20 to 65°C (Depends on the battery) Between 2 weeks and One year: −15 to 40°C

Over one year: −15 to 25°C

Storage humidity 10 to 95% RH (non condensing) Storage atmospheric pressure 70 to 106 kPa

Recording paper storage temperature −20 to 50°C Recording paper storage humidity 25 to 90% RH Electromagnetic compatibility Class B Other Indoor portable

Dimensions and weight

Dimensions 280 W × 52 H × 216 D mm (excluding protrusions) Weight ECG-9010K: approx. 2.5 kg (with battery), approx. 1.9 kg (without battery)

ECG-9020K: approx. 2.9 kg (with battery), approx. 2.1 kg (without battery)

Safety

Safety standard:

IEC601-1 Amendment 1,2 IEC601-2-25

Type of protection against electric shock:

AC po wer: Class I Batty 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

1.4 Service Manual ECG-9010/9020 Rev A

Panel Description

1. GENERAL

ECG-9010K Electrocardiograph

T op View

Name

1. Operation panel

2. Magazine (recording paper container)

3. Magazine release button

Service Manual ECG-9010/9020 Rev A 1.5

1. GENERAL

Operation Panel

Name

4. Battery charge lamp

5. Battery operation lamp

6. AC power lamp

7. POWER key/lamp

8. FEED/MARK key

9. FILTER key/lamp

10. COPY/CAL key/lamp

11. STA RT/STOP key/lamp

12. AUTO/MANUAL key/lamp

13. REST/PERIODIC key/lamp

14. AGE key/lamp

15. SPEED key/lamp

16. GAIN key/lamp

17. LEAD keys/lamp

18. QRS sync lamp

1.6 Service Manual ECG-9010/9020 Rev A

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-9010K Operator’s Manual.

Name

19. Patient input connector

20. EXT-IN connector

21. CRO-OUT

22. SIO connector

23. AC power cord socket

24. Battery compartment

25. Equipotential ground terminal

Service Manual ECG-9010/9020 Rev A 1.7

1. GENERAL

ECG-9020K Electrocardiograph

T op View

Name

1. Operation panel

2. Magazine (recording paper container)

3. Magazine release button

4. LCD screen

1.8 Service Manual ECG-9010/9020 Rev A

Operation Panel

1. GENERAL

Name

5. Battery charge lamp

6. Battery operation lamp

7. AC power lamp

8. POWER key/lamp

9. MODE key 10 RHYTHM key/lamp

11. FEED/MARK key

12. FILTER key/lamp

13. COPY/CAL key/lamp

14. STA RT/STOP key/lamp

15. AUTO/MANUAL key/lamp

16. F1, F2, F3 function keys

17. AGE key

18. SEX key

Service Manual ECG-9010/9020 Rev A 1.9

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-9020K Operator’s Manual.

Name

19. Patient input connector

20. EXT-IN connector

21. CRO-OUT

22. SIO connector

23. AC power cord socket

24. Battery compartment

25. Equipotential ground terminal

1.10 Service Manual ECG-9010/9020 Rev A

Composition

ECG-9010K Electrocardiograph

1. GENERAL

ECG-9010K

(Optional)

RK-0002 Bottom Casing Assy

RK-0003 Internal Parts

GC-0011 Motor Assy

RH-0001 Magazine Assy

RK-0004 Thermal Head Assy

RK-0005 Speaker Assy

RK-0006 Battery Terminal Assy

RK-0007 ECG-9010K Top Casing Assy

SC-903D Power Unit

UT-23561 ECG Control Board

UT-2357 Flash ROM Board

KD-103E Cart

KH-801E Patient Cable Hanger

DI-106D Fixing Plate for Cart

YC-901D Carrying Case

••

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

••

• To order a replacement component inside an assembly, refer to “Section 7

••

Replaceablet Parts List”.

Service Manual ECG-9010/9020 Rev A 1.11

1. GENERAL

ECG-9020K Electrocardiograph

ECG-9020K

RK-0002 Bottom Casing Assy

RK-0003 Internal Parts

GC-0011 Motor Assy

RH-0001 Magazine Assy

RK-0004 Thermal Head Assy

RK-0005 Speaker Assy

RK-0006 Battery Terminal Assy

RK-0009 ECG-9020K Top Casing Assy

SC-903D Power Unit

UT-23561 ECG Control Board

UT-2357 Flash ROM Board

(Optional)

VL-0001 LCD Assy

KD-103E Cart

KH-801E Patient Cable Hanger

DI-106D Fixing Plate for Cart

YC-901D Carrying Case

••

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

••

• To order a replacement component inside an assembly, refer to “Section 7

••

Replaceable Parts List”.

1.12 Service Manual ECG-9010/9020 Rev A

Location

1. GENERAL

Motor Assy

Speaker Assy

ECG Control Board

Thermal Head Assy

LCD Assy (for ECG-9020K only)

Flash ROM Board

Inverter Board (for ECG-9020K only)

Pow er Unit

Service Manual ECG-9010/9020 Rev A 1.13

1. GENERAL

Block Diagram

NOTE

The LCD module and inverter board are used for the ECG-9020K only.

AC source

Piezo-electric buzzer

Motor, Motor sensor, Mark sensor

Membrane key

LCD module

2 pin

5 pin

Inverter board

Thermal head

CN11 (3pin)

Po wer Unit (SC-903D)

CNA011

CNA012

CNA015

CNA013

CN31 (16pin)

CNJ032 (2pin)

CNJ036 (12pin)

CNJ033 (40pin)

CNJ012 (12pin)

CNJ013 (6pin)

CNJ011 (12pin)

CN021 (30pin)

CN51 (4pin)

Flash ROM Board

ECG Control Board

(UT-23561)

CNJ035 (30pin)

(UT-2357)

CNJ011 (80pin)

CNJ021 (80pin)

CNJ031 (D-SUB 9pin)

CNJ043 (mini jack)

CNJ041 (mini jack)

CNJ091 (D-SUB15pin)

SIO

EXT-IN

CRO

Patient Input

Battery

CNA014

1.14 Service Manual ECG-9010/9020 Rev A

Connection Diagram

Index Connector No. NK Code No. Description

1* CNA011 543993A ZHR-2 speaker cable (L50) 2 CNA012 544002A ZHR-12 motor cable (L120, 65) 3 CNA013 544029B FCN723/DF11(100)/51021(40) 4 CNA014 544011A EHR-4 battery terminal cable (L150) 5 CNA015 544038A 51021-0500/51021-0600 (L50)

* We cannot provide this cable seperately; we can only provide it as part of a complete Speaker assy. Refer to

“Speaker Assy” in Section 8.

1. GENERAL

¬ CNA011

® CNA013

- CNA012

° CNA015

¯ CNA014

Service Manual ECG-9010/9020 Rev A 1.15

Section 2 Maintenance

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

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

Cleaning............................................................................................................................. 2.2

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

Cleaning the Paper Mark Sensor and Paper Empty Sensor .................................... 2.2

Cleaning the Motor Rotation Sensor and

Greasing the Motor Gear and Gear Meshed with Motor Gear................................. 2.3

Service Manual ECG-9010/9020 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. KPT-104-8MGF1-NKC 541816 Thermal head After 30 km of

recording LM32019T 545946 LCD Module After 10000 hours Motor ASSY GC-0011 Motor ASSY After 1000 hours BR2032/1F2 390765 Lithium battery** See below.

* Replace the battery when it cannot last for 30 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 approx. 7 years.

Service Manual ECG-9010/9020 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 Paper Mark Sensor and Paper Empty Sensor

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

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

2.2 Service Manual ECG-9010/9020 Rev A

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 two 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 assy

Motor rotation sensor and photodiode

Motor SENS board

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 gear.

Service Manual ECG-9010/9020 Rev A 2.3

2. MAINTENANCE

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.

Top view

Motor gear

Gear meshed with motor gear

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.

Motor

2.4 Service Manual ECG-9010/9020 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 Prob lem........................................................... 3.4

Troubleshooting Recording Prob lem........................................................................ 3.6

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

Service Manual ECG-9010/9020 Rev A 3C.1

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