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Summary of Contents for Nihon Kohden ECG-9010K

• Page 1 SERVICE MANUAL cardiofax GEM ELECTROCARDIOGRAPH ECG-9010K, ECG-9020K ECG-9020P, ECG-9022K 0634-001307B..

• Page 2: Table Of Contents

  General ......... 1C.1 Introduction ............. 1.1 Service Policy ............1.2 Specifications ............1.3 Panel Description ............. 1.5 ECG-9010K Electrocardiograph ......... 1.5 Top View ...........1.5 Operation Panel ..........1.6 Right Side Panel ..........1.7 ECG-9020K/P Electrocardiograph ........1.8 Top View ...........1.8 Operation Panel ..........
• Page 3 CONTENTS Troubleshooting General Operation Problem ........ 3.4 Troubleshooting Recording Problem ........3.6 System Error Message ...........3.7 Section 4 System Test, Adjustment 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 .........
• Page 4 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 Top Casing Assy, RK-0044 for ECG-9020P .......7.6 Top Casing Assy, RK-0058 for ECG-9022K .......7.7 Thermal Head Assy, YZ-011H8 ..........
• Page 5 CONTENTS CNJ091 (to ECG Connector) .........8.9 Flash ROM Board ............ 8.10 CNJ021 (to ECG Control Board) ........8.10 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 ...........

• Page 6: Conventions Used In This Manual And Instrument

  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.
• Page 7 Operation panel (for ECG-9010K onlly) Alternating current Filter “On” only for a part of REST/PERIODIC Copy equipment recording “Off” only for a part of Calibration Paper speed equipment Battery charging (lamp/on START/STOP recording Gain screen) Battery check (lamp/on Paper feed..
• Page 8 Display (for ECG-9020K only) QRS sync lamp Patient cable Defibrillation-proof Attention, consult Type CF applied part operator’s manual Service Manual ECG-9010/9020 Rev A..
• Page 9 Section 1 General Introduction ............1.1 Service Policy ............1.2 Specifications ............1.3 Panel Description ............ 1.5 ECG-9010K Electrocardiograph ........1.5 Top View ...........1.5 Operation Panel ........... 1.6 Right Side Panel .......... 1.7 ECG-9020K/P Electrocardiograph ........1.8 Top View ...........1.8 Operation Panel ...........

• Page 10: General

  Introduction This service manual provides useful information to qualified service personnel to understand, troubleshoot, service, maintain and repair the ECG-9010K, ECG- 9020K/P and ECG-9022K Electrocardiograph (referred to in this service manual as “the instrument”, “ECG-9010K” or “ECG-9020K” which includes ECG-9020P and ECG-9022K).

• Page 11: Service Policy

  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.

• Page 12: Specifications

  1. GENERAL 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 (–..
• Page 13 Other Indoor portable Dimensions and weight 280 W × 52 H × 216 D mm (excluding protrusions) Dimensions Weight ECG-9010K: Approx. 1.9 kg (without battery) ECG-9020K/P: Approx. 2.1 kg (without battery) ECG-9022K: Approx. 2.1 kg (without battery) Safety Safety standard:..

• Page 14: Panel Description

  1. GENERAL Panel Description ECG-9010K Top View Electrocardiograph Name 1. Operation panel 2. Magazine (recording paper container) 3. Magazine release button Service Manual ECG-9010/9020 Rev B..

• Page 15: Operation Panel

  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. START/STOP key/lamp 12. AUTO/MANUAL key/lamp 13. REST/PERIODIC key/lamp 14. AGE key/lamp 15.

• Page 16: Right Side Panel

  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.

• Page 17: Ecg-9020k/p Electrocardiograph

  1. GENERAL ECG-9020K/P Top View Electrocardiograph Name 1. Operation panel 2. Magazine (recording paper container) 3. Magazine release button 4. LCD screen The keyswithes on the ECG-9020P have a name label instead of the symbol. Service Manual ECG-9010/9020 Rev B..

• Page 18: Operation Panel

  1. GENERAL Operation Panel 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. START/STOP key/lamp 15. AUTO/MANUAL key/lamp 16.

• Page 19: Right Side Panel

  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 or ECG 9020P Operator’s Manual. Name 19. Patient input connector 20. EXT-IN connector 21. CRO-OUT 22.

• Page 20: Ecg-9022k Electrocardiograph

  1. GENERAL ECG-9022K Top View Electrocardiograph Name 1. Operation panel 2. Magazine (recording paper container) 3. Magazine release button 4. LCD screen Service Manual ECG-9010/9020 Rev B 1.11..

• Page 21: Operation Panel

  1. GENERAL Operation Panel 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. START/STOP key/lamp 15. AUTO/MANUAL key/lamp 16.

• Page 22: Right Side Panel

  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-9022K Operator’s Manual. Name 19. Patient input connector 20. EXT-IN connector 21. CRO-OUT 22. SIO connector 23.

• Page 23: Composition

  GC-0011 Motor Assy RH-0001 Magazine Assy RK-0004 Thermal Head Assy RK-0005 Speaker Assy RK-0006 Battom Terminal Assy RK-0007 ECG-9010K Top Casing Assy SC-903D Power Unit UT-23561 ECG Control Board UT-2357 Flash ROM Board (Optional) KD-104E Cart KH-801E Patinet Cable Hanger..

• Page 24: Ecg-9020k Electrocardiograph

  1. GENERAL ECG-9020K Electrocardiograph RK-0002 Bottom Casing Assy ECG-9020K RK-0003 Internal Parts GC-0011 Motor Assy RH-0001 Magazine Assy RK-0004 Thermal Head Assy RK-0005 Speaker Assy RK-0006 Battom Terminal Assy RK-0009 ECG-9020K Top Casing Assy SC-903D Power Unit UT-23561 ECG Control Board UT-2357 Flash ROM Board VL-0001..

• Page 25: Ecg-9020p Electrocardiograph

  1. GENERAL ECG-9020P Electrocardiograph RK-0002 Bottom Casing Assy ECG-9020P RK-0003 Internal Parts GC-0011 Motor Assy RH-0001 Magazine Assy RK-0004 Thermal Head Assy RK-0005 Speaker Assy RK-0006 Battom Terminal Assy RK-0044 ECG-9020P Top Casing Assy SC-903D Power Unit UT-23563 ECG Control Board UT-23577 Flash ROM Board VL-0001..

• Page 26: Ecg-9022k Electrocardiograph

  1. GENERAL ECG-9022K Electrocardiograph RK-0002 Bottom Casing Assy ECG-9022K RK-0003 Internal Parts GC-0011 Motor Assy RH-0001 Magazine Assy RK-0004 Thermal Head Assy RK-0005 Speaker Assy RK-0006 Battom Terminal Assy RK-0058 ECG-9022K Top Casing Assy SC-903D Power Unit UT-23564 ECG Control Board UT-2357D Flash ROM Board VL-0001..

• Page 27: Location

  1. GENERAL Location Thermal Head Assy LCD Assy (for ECG-9020K/9020P/9022K only) Flash ROM Board Motor Assy Inverter Board (for ECG-9020K/9020P/9022K only) Speaker Assy ECG Control Board Power Unit 1.18 Service Manual ECG-9010/9020 Rev B..

• Page 28: Block Diagram

  1. GENERAL Block Diagram NOTE The LCD module and inverter board are used for the ECG-9020K, ECG-9020P and ECG-9022K only. Piezo-electric CNA011 CNJ032 (2pin) buzzer Flash ROM Board Motor, Motor sensor, CNA012 CNJ036 (12pin) Mark sensor CNJ011 (80pin) Membrane key CNJ033 (40pin) CNJ021 (80pin) LCD module..

• Page 29: Connection Diagram

  1. GENERAL Connection Diagram Index Connector No. NK Code No. Description CNA011 543993A ZHR-2 speaker cable (L50) CNA012 544002A ZHR-12 motor cable (L120, 65) CNA013 544029B FCN723/DF11(100)/51021(40) CNA014 544011A EHR-4 battery terminal cable (L150) 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”..
• Page 30 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..

• Page 31: Maintenance

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

• Page 32: Cleaning

  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.

• Page 33: Cleaning The Motor Rotation Sensor And

  2. MAINTENANCE Cleaning the Motor 1. Detach the top casing from the bottom casing as described in the Rotation Sensor and “Disassembly and Assembly” section. Greasing the Motor Gear and Gear Meshed with 2. Remove the two screws holding the motor assy to the bottom casing and Motor Gear remove the motor assy.
• Page 34 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 Motor with motor gear 7. Reattach the MOTOR SENS board to the motor with the two screws. 8.
• Page 35 Section 3 Troubleshooting and System Error Message Troubleshooting Flowchart ..........3.1 Troubleshooting Table ...........3.4 Troubleshooting General Operation Problem ......3.4 Troubleshooting Recording Problem ........ 3.6 System Error Message ........... 3.7 Service Manual ECG-9010/9020 Rev A 3C.1..

• Page 36: Troubleshooting And System Error Message

  3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE This section describes how to troubleshoot the instrument, using the following: - flowchart - troubleshooting table - system error messages at power-up Troubleshooting Flowchart Use the troubleshooting flowchart to find the possible sources of a problem. Troubleshooting Flowchart <ECG-9020K only>..
• Page 37 3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE The power of the instrument does not turn Does the instrument operate during AC power operation? Does the LED of the AC power Check the cable connections light? to the CNJ013 connector on the ECG control board and the connector on the Inverter board.
• Page 38 3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE The recorder does not feed the recording paper when the Start switch is pressed. Does the LED for the Start Does the recorder print Normal switch light up? in manual mode? Does the recorder print when the recording paper Check the cable connection Does the paper empty..

• Page 39: Troubleshooting Table

  3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Troubleshooting Table 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.
• Page 40 3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Possible Cause/Criteria Action Problem No key or switch operation. Damaged membrane key. Replace the membrane key. Faulty connection to the CNJ033 Check the connection to the connector on the ECG control CNJ033 connector on the ECG board.

• Page 41: Troubleshooting Recording Problem

  3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Troubleshooting Recording Problem Possible Cause/Criteria Action Problem The recorder does not feed the Dirty paper mark sensor. Clean the paper mark sensor. recording paper when the Start switch is pressed. Faulty connection to the CNJ033 Check the connection to theCNJ033 or CNJ036 connector on the ECG and CNJ0336 connectors on the ECG..

• Page 42: System Error Message

  3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE 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-9020 only) or printed due to transient noise.
• Page 43 3. TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Corrective Action Error No. Meaning '12' Illegal command. Replace the ECG control board. '13' Zero division error. Replace the ECG control board. '14' Power off time out. Replace the ECG control board. '15' EEPROM error: This occurs due to the Replace the ECG control board.
• Page 44 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: Date: Apr 20, 1998 10:41 AM Program: 9020K Version: 01-00 01-01 01-01 ********** Error History ********** No.1..
• Page 45 Section 4 System Test, Adjustment, And Setting 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 .........

• Page 46: System Test, Adjustment And Setting

  4. SYSTEM TEST, ADJUSTMENT 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. •..

• Page 47: Calling Up The Test Level 1

  (The System Test screen appears for the ECG-9020K only as shown below.) To cancel printing the following information, press the START/STOP key. The only difference between the ECG-9010K and ECG-9020K printouts is the description of the key explanation. Printout (ECG-9020K)

• Page 48: Calling Up The Test Level 2

  (The System Test screen appears for the ECG-9020K only as shown below.) To cancel printing the following information, press the START/STOP key. The only difference between the ECG-9010K and ECG-9020K printouts is the description of the key explanation. Printout (ECG-9020K)

• Page 49: Entering The System Test Number

  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-9010K Keys and Corresponding Number Values Number Number..

• Page 50: Executing The System Test

  (ECG-9020K only). System Test Screen (ECG-9020K) If you entered an unspecified number, an alarm occurs. The alarm indication is different between the ECG-9010K and ECG-9020K as follows: • ECG-9010K: 8 repeating “pips” alarm sound is generated.

• Page 51: Quitting The System Test

  4. SYSTEM TEST, ADJUSTMENT 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.

• Page 52: Demonstration

  4. SYSTEM TEST, ADJUSTMENT AND SETTING Demonstration 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-9020k only).

• Page 53: Recorder

  4. SYSTEM TEST, ADJUSTMENT 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.
• Page 54 4. SYSTEM TEST, ADJUSTMENT AND SETTING Check Procedure for Diagonal Lines Check that all the diagonal lines are evenly and completely printed. Corrective Action Possible Source of Problem A dirty thermal head can cause some parts Clean the thermal head with the thermal to be unevenly or incompletely printed.
• Page 55 4. SYSTEM TEST, ADJUSTMENT 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”..

• Page 56: Thermal Head

  4. SYSTEM TEST, ADJUSTMENT AND SETTING Thermal Head 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”..

• Page 57: Key

  4. SYSTEM TEST, ADJUSTMENT AND SETTING 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.

• Page 58: Memory

  4. SYSTEM TEST, ADJUSTMENT AND SETTING Memory 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.

• Page 59: Single Memory Test Mode

  4. SYSTEM TEST, ADJUSTMENT 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.

• Page 60: Lcd/led

  LCD (ECG-9020K 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-9010K. LCD Test (ECG-9020K only) The LCD displays the following four types of test patterns every two seconds in the following order: 1.
• Page 61 4. SYSTEM TEST, ADJUSTMENT 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.

• Page 62: Input Unit

  4. SYSTEM TEST, ADJUSTMENT AND SETTING Input Unit 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”..

• Page 63: Calibration

  4. SYSTEM TEST, ADJUSTMENT 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.

• Page 64: Communication

  4. SYSTEM TEST, ADJUSTMENT AND SETTING Communication 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.
• Page 65 4. SYSTEM TEST, ADJUSTMENT 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”.

• Page 66: Cro/ext1

  4. SYSTEM TEST, ADJUSTMENT AND SETTING CRO/EXT1 This is used to check the external output/input terminal, using the check jig. The instrument has the input signal terminal (EXT-IN connector) and 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..
• Page 67 4. SYSTEM TEST, ADJUSTMENT AND SETTING Procedure 1. Connect the check jig to the CRO-OUT/EXT-IN sockets of the instrument. 2. Enter the system test number [08] (Test level 1) or [10] (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.

• Page 68: System Setup Initialization

  START/STOP key. If the initialization is completed, the folloing occurs: • ECG-9010K: One “bing bong” alarm sound is generated and the instrument returns to the stanby mode for entering the system test number. • ECG-9020K: A “System Setup Initialization” message appears with one “bing bong”..

• Page 69: Ecg Findings List Recording

  4. SYSTEM TEST, ADJUSTMENT 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.

• Page 70: Recording Resolution Setting

  4. SYSTEM TEST, ADJUSTMENT AND SETTING 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.

• Page 71: Cue Mark Adjustment

  4. SYSTEM TEST, ADJUSTMENT 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.
• Page 72 4. SYSTEM TEST, ADJUSTMENT 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 Value (mm) Value (mm) − 4.0 [13] [21] −..

• Page 73: Date And Time Setting

  4. SYSTEM TEST, ADJUSTMENT 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.
• Page 74 4. SYSTEM TEST, ADJUSTMENT 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”..
• Page 75 If you entered an unspecified number, an alarm occurs. The alarm indication is different between the ECG-9010K and ECG-9020K as follows: • ECG-9010K: 8 repeating “pips” alarm sound is generated. • ECG-9020K: 8 repeating “pips” alarm sound and the “Invalid number.
• Page 76 Section 5 Board/Unit Description Block Diagram ............5.1 Power Unit ............. 5.2 ECG Control Board ...........5.2 Flash ROM Board ...........5.3 Inverter Board ............5.3 Service Manual ECG-9010/9020 Rev A 5C.1..

• Page 77: Board/unit Description

  5. BOARD/UNIT DESCRIPTION Block Diagram NOTE The LCD module and inverter board are used for the ECG-9020K only. Piezo-electric CNA011 CNJ032 (2pin) buzzer Flash ROM Board (UT-2357) Motor, Motor sensor, CNA012 CNJ036 (12pin) Mark sensor CNJ011 (80pin) Membrane key CNJ033 (40pin) CNJ021 (80pin) LCD module CNJ012 (12pin)

• Page 78: Power Unit

  5. BOARD/UNIT DESCRIPTION Power Unit 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. ECG Control Board The ECG Control board consists of the following components: Component Description CPU:..

• Page 79: Flash Rom Board

  5. BOARD/UNIT DESCRIPTION Flash ROM Board 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. Inverter Board 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..
• Page 80 Section 6 Disassembly and Assembly Before You Begin ............ 6.1 Warnings and Cautions .......... 6.1 Required Tools ...........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 .........

• Page 81: Disassembly And Assembly

  6. DISASSEMBLY AND ASSEMBLY The procedures in this section tell how to remove, replace and install major components in the instrument. Before You Begin Removing, replacing and installing major components should be done by qualified service personnel. Warnings and Cautions WARNINGS •..

• Page 82: Board And Unit Location

  6. DISASSEMBLY AND ASSEMBLY Board and Unit Location The following see-through diagram shows the location of the boards and units in the instrument. See-through Diagram Thermal Head Assy LCD Assy (for ECG-9020K only) Flash ROM Board Motor Assy Inverter Board Speaker Assy (for ECG-9020K only)

• Page 83: Cable Connection

  6. DISASSEMBLY AND ASSEMBLY Cable Connection The following cable connection diagram shows the connection of the cables in the instrument. Cable Connection Diagram ® CNA013 - CNA012 ° CNA015 ¬ CNA011 ¯ CNA014 Service Manual ECG-9010/9020 Rev A..

• Page 84: Removing The Top Casing

  6. DISASSEMBLY AND ASSEMBLY Removing the Top Casing 1. Reverse the instrument and remove the three M3 pan head screws. M3 pan head screw CAUTION When opening the top casing, be sure not to let the top casing fall off. Otherwise, the film cable which connects the top casing and ECG control board and the film cable connector may be damaged.

• Page 85: Removing The Lcd Assy

  6. DISASSEMBLY AND ASSEMBLY Removing the LCD Assy NOTE This procedure is used for the ECG-9020K only. 1. Remove the top casing as described in the “Removing the Top Casing” section. 2. Remove the four M3 pan head screws with spring washers which are marked with circles shown below.

• Page 86: Removing The Thermal Head Assy

  6. DISASSEMBLY AND ASSEMBLY Removing the Thermal Head Assy CAUTION 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.
• Page 87 6. DISASSEMBLY AND ASSEMBLY 5. Remove the thermal head springs from the thermal head spring hooks. 6. Remove the three M3 pan head screws with spring washers. CAUTIONS WHEN REPLACING • • • • • Replace the thermal head bracket so that the mark sensor BD earth plate spring is not damaged.

• Page 88: Removing The Motor Assy

  6. DISASSEMBLY AND ASSEMBLY Removing the Motor Assy 1. Remove the top casing as described in the “Removing the Top Casing” section. 2. Remove the LCD assy as described in the “Removing the LCD Assy” section. This step is for the ECG-9020K only. 3.

• Page 89: Removing The Speaker Assy

  6. DISASSEMBLY AND ASSEMBLY Removing the Speaker Assy 1. Remove the top casing as described in the “Removing the Top Casing” section. 2. Remove the LCD assy as described in the “Removing the LCD Assy” section. This step is for the ECG-9020K only. 3.

• Page 90: Removing The Inverter Board

  6. DISASSEMBLY AND ASSEMBLY Removing the Inverter Board WARNING The inverter board has a high voltage circuit for the LCD backlight. This can cause shock up to 10 minutes after the power is turned off. After the power is turned off, wait 10 minutes before disassembling the instrument.

• Page 91: Removing The Ecg Control Board

  6. DISASSEMBLY AND ASSEMBLY Removing the ECG Control Board CAUTION 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.

• Page 92: Removing The Power Unit

  6. DISASSEMBLY AND ASSEMBLY Removing the Power Unit 1. Remove the top casing as described in the “Removing the Top Casing” section. 2. Remove the LCD assy as described in the “Removing the LCD Assy” section. This step is for the ECG-9020K only. 3.
• Page 93 6. DISASSEMBLY AND ASSEMBLY 8. Disconnect the battery terminal assy connector from the power unit. 9. Remove the ferrite tape holding the thermistor wire to the battery compartment. 10.Remove the battery cover plate. CAUTION Do not completely lift off the power unit from the bottom casing before removing the thermistor.

• Page 94: Replacing The Thermistor And Termistor Cable

  6. DISASSEMBLY AND ASSEMBLY Replacing the Thermistor and Thermistor Cable CAUTION Observe the following when replacing the thermistor: • • • • • The thermistor wire must go under the thermistor seal as shown below. Positioning the thermistor wire over the thermistor seal results in incorrect temperature measurement or a damaged thermistor.

• Page 95: Removing The Battery Terminal Assy

  6. DISASSEMBLY AND ASSEMBLY Removing the Battery Terminal Assy 1. Remove the top casing as described in the “Removing the Top Casing” secion. 2. Remove the LCD assy as described in the “Removing the LCD Assy” section. This step is for the ECG-9020K only. 3.

• Page 96: Removing The Magazine Assy

  6. DISASSEMBLY AND ASSEMBLY 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 shown below and pull off the magazine assy in the direction of the bigger arrow shown below.

• Page 97: Removing The Bottom Casing

  6. DISASSEMBLY AND ASSEMBLY Removing the Bottom Casing NOTE The instrument label is not attached to the bottom of the provided new bottom casing. If you want to attach the instrument label to the new bottom casing, send the damaged bottom casing, and we will provide the same instrument label at our price.

• Page 98: Replacing The Fuse On The Power Board

  6. DISASSEMBLY AND ASSEMBLY Replacing the Fuse on the Power Board NOTE A blown fuse indicates that there may be a faulty circuit in the instrument. Always check the instrument for the cause of the blown fuse before replacing the fuse. The illustration below shows the location of four fuses inside the instrument.

• Page 99: Replacing The Lithium Battery On The Ecg Control Board

  6. DISASSEMBLY AND ASSEMBLY Replacing the Lithium Battery on the ECG Control Board The lithium battery is used for backing up the system setup setting. NOTE Replace the lithium battery when the No. 08 or 09 system error message appears or after the lithium battery is used for approx. 7 years.
• Page 100 Section 7 Replaceable Parts List 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 Top Casing Assy, RK-0044 for ECG-9020P ....... 7.6 Top Casing Assy, RK-0058 for ECG-9022K ....... 7.7 Thermal Head Assy, YZ-011H8 .........

• Page 101: Replaceable Parts List

  7. REPLACEABLE PARTS LIST When ordering parts or accessories from your nearest Nihon Kohden Corporation distributor, please quote the NK code number and part name which are listed in this service manual, and the name or model of the unit in which the required part is located.

• Page 102: General Parts List

  7. REPLACEABLE PARTS LIST General Parts List Index NK Code No. Description RK-0009 ECG-9020K top casing Assy 101A RK-0007 ECG-9010K top casing Assy VL-0001 LCD Assy 1124-037173 High voltage label 543984 Inverter board 6114-088371A Shield sheet 1 UT-2357 Flash ROM board..
• Page 103 7. REPLACEABLE PARTS LIST Service Manual ECG-9010/9020 Rev B..

• Page 104: Top Casing Assy

  7. REPLACEABLE PARTS LIST Top Casing Assy Top Casing Assy, RK-0007 for ECG-9010K Index NK Code No. Description 6114-087853A Release button 547525 Ultra spring C105 6143-008671 Operation panel Assy 6123-010278B Top casing for ECG-9010K 6114-092731A Membrane EMI spring 541914 Ferrite core FPC-24-12-3..

• Page 105: Top Casing Assy, Rk-0009 For Ecg-9020k

  7. REPLACEABLE PARTS LIST Top Casing Assy, RK-0009 for ECG-9020K Index NK Code No. Description 6114-087853A Release button 547525 Ultra spring C105 6143-008234B Operation panel Assy for ECG-9020K 6123-010153A Top casing for ECG-9020K 6114-092731A Membrane EMI spring 6114-088362A LCD filter 541914 Ferrite core FPC-24-12-3 6114-092749A..

• Page 106: Top Casing Assy, Rk-0044 For Ecg-9020p

  7. REPLACEABLE PARTS LIST Top Casing Assy, RK-0044 for ECG-9020P Index NK Code No. Description 6114-087853A Release button 547525 Ultra spring C105 6143-011979 Operation panel Assy for ECG-9020P 6123-010153A Top casing for ECG-9020K 6114-092731A Membrane EMI spring 6114-088362A LCD filter 541914 Ferrite core FPC-24-12-3 6114-092749A..

• Page 107: Top Casing Assy, Rk-0058 For Ecg-9022k

  7. REPLACEABLE PARTS LIST Top Casing Assy, RK-0058 for ECG-9022K Index NK Code No. Description 6114-087853A Release button 547525 Ultra spring C105 6143-012595 Operation panel Assy for ECG-9022K 6123-010153A Top casing for ECG-9020K 6114-092731A Membrane EMI spring 6114-088362A LCD filter 541914 Ferrite core FPC-24-12-3 6114-092749A..

• Page 108: Thermal Head Assy, Yz-011h8

  7. REPLACEABLE PARTS LIST Thermal Head Assy, YZ-011H8 Index NK Code No. Description 541816 Thermal head KPT-104-8MGF1-NKC 6114-088389A Shield sheet 3 Service Manual ECG-9010/9020 RevB..

• Page 109: Motor Assy, Gc-0011

  7. REPLACEABLE PARTS LIST Motor Assy, GC-0011 Index NK Code No. Description 6113-028536A Gear bracket 6114-087906A Gear 2 106993 E-ring E-24 6114-087898A Gear 1 6114-087915A Gear 3 × 355108 Hexagon socket screw M2 6114-087889C Motor gear 6114-088282A Motor bracket 343975 Motor DN35-7306NIB 544002A ZHR-12 motor cable (L120, 65)

• Page 110: Speaker Assy, Rk-0005

  7. REPLACEABLE PARTS LIST Speaker Assy, RK-0005 Index NK Code No. Description 0424-007654 RK-0005 7.10 Service Manual ECG-9010/9020 RevB..

• Page 111: Magazine Assy, Rh-0001

  7. REPLACEABLE PARTS LIST Magazine Assy, RH-0001 Index NK Code No. Description 107002 E-ring E-32 6114-088415A Paper roller spacer 6112-010397A Paper Magazine 6114-088353A Paper magazine shaft 547534 Ultra spring C1477 6114-087871A Paper roller gear 6113-028527A Paper roller 14 (110) 6114-023887A Brush Service Manual ECG-9010/9020 Rev B 7.11..

• Page 112: Battery Terminal Assy, Rk-0006

  7. REPLACEABLE PARTS LIST Battery Terminal Assy, RK-0006 Index NK Code No. Description 544011A EHR-4 battery terminal cable (L150) 2113-013175B Battery bracket 2114-040865A Battery terminal 299784 Battery cable tube 7.12 Service Manual ECG-9010/9020 RevB..

• Page 113: Lcd Assy, Vl-0001

  7. REPLACEABLE PARTS LIST LCD Assy, VL-0001 Index NK Code No. Description 545946 LCD module 541914 Ferrite 6114-092749A Ferrite tape 6114-088344B LCD holder 6144-092758A LCD shield sheet Service Manual ECG-9010/9020 Rev B 7.13..

• Page 114: Patient Cable Hanger

  7. REPLACEABLE PARTS LIST Patient Cable Hanger Index NK Code No. Description 6124-202372 CH panel N* 6112-00 6045 CH cover N* 2219-013205 CH cover screw* 2219-013214 CH knob spacer 2114-038707A CH arm screw 6113-016941 CH base plate N 6113-016879A CH joint DN 6113-016888 CH pipe 3N 398855..
• Page 115 7. REPLACEABLE PARTS LIST Service Manual ECG-9010/9020 Rev B 7.15..

• Page 116: Connector Pin Assignment

  Section 8 Connector Pin Assignment Power 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) .........

• Page 117: Power Unit

  8. CONNECTOR PIN ASSIGNMENT Power Unit CN11 (to AC Inlet) Pin No. Signal name Description AC power DGND Ground AC power CN21 (to ECG control board) Pin No. Signal name Description Pin No. Signal name Description DGND Ground for logic circuit PWROVER DGND Ground for logic circuit..

• Page 118: Ecg Control Board

  8. CONNECTOR PIN ASSIGNMENT ECG Control Board CNJ011 (to Thermal Head) Model: 63261-1490 Pin No. Signal name Direction Description THLATCH Output Data latch output to thermal head THDATA Output Print data to thermal head XSTROPE1 Output Thermal head driver enable output XSTROPE1 Output Thermal head driver enable output..

• Page 119: Cnj013 (to Lcd)

  8. CONNECTOR PIN ASSIGNMENT CNJ013 (to LCD) Model: FH3-12S-1.25DSA Pin No. Signal name Direction Description Output Scannning start output Output Input data latch ouput Output Data input clock output Not connected LCDON Output Display control output (“L” = OFF) LCD [0] Output Display data output [0] LCD [1]..
• Page 120 8. CONNECTOR PIN ASSIGNMENT Pin No. Signal name Direction Description LA [19] Output Address bus LD [08] Input/Output Data bus LD [09] Input/Output Data bus LD [10] Input/Output Data bus LD [11] Input/Output Data bus LD [12] Input/Output Data bus LD [13] Input/Output Data bus..

• Page 121: Cnj031 (to Sio Connector)

  8. CONNECTOR PIN ASSIGNMENT Pin No. Signal name Direction Description LD [30] Input/Output Data bus LD [31] Input/Output Data bus LD [15] Input/Output Data bus +5 V +5 V for logic circuit DGND Ground for digital circuit DGND Ground for digital circuit CNJ031 (to SIO Connector) Model: JEY-9S-1A28 Pin No.

• Page 122: Cnj033 (to Speaker)

  8. CONNECTOR PIN ASSIGNMENT CNJ033 (to Speaker) Model: 52559-4092 Pin No. Signal name Direction Description +5 V +5 V for logic circuit Output +5 V +5 V for logic circuit Output LED [00] Output LED display output LED [01] Output LED display output LED [02] Output..

• Page 123: Cnj035 (to Power Unit)

  8. CONNECTOR PIN ASSIGNMENT CNJ035 (to Power Unit) Model: TX24-30P-12ST-H1 Pin No. Signal name Direction Description DGND Ground for logic circuit DGND Ground for logic circuit DGND Ground for logic circuit DGND Ground for logic circuit DGND Ground for logic circuit DGND Ground for logic circuit DGND..

• Page 124: Cnj036 (to Motor)

  8. CONNECTOR PIN ASSIGNMENT CNJ036 (to Motor) Model: B12B-ZR Pin No. Signal name Direction Description +5 V +5 V for paper empty/mark sensor PAEMP Input Paper empty snsor input PAMARK Input Mark sensor input DGND Ground for paper empty/mark sensor Output Paper empty sensor LED output +5 VR301..

• Page 125: Cnj091 (to Ecg Connector)

  8. CONNECTOR PIN ASSIGNMENT CNJ091 (to ECG Connector) Model: JAY-15S-1A28 Pin No. Signal name Direction Description Input ECG signal input Input ECG signal input Input ECG signal input Input ECG signal input Iutput ECG signal input SHIELD Cable shield Not connected Not connected Input ECG signal input..

• Page 126: Flash Rom Board

  8. CONNECTOR PIN ASSIGNMENT Flash ROM Board CNJ021 (to ECG Control Board) Model: 87BMN-080R Pin No. Signal name Direction Description DGND Ground for digital circuit DGND Ground for digital circuit +5 V +5 V for logic circuit XCSRO1 Output Chip select 1 for ROM (Address: $000000 to $0FFFFF) XCSRO2 Output Chip select 2 for ROM (Address: $100000 to $1FFFFF)
• Page 127 8. CONNECTOR PIN ASSIGNMENT Pin No. Signal name Direction Description Output Read output Output Write output XBERR Output Output for system test LA [22] Output Address bus LA [21] Output Address bus SROMD Input Serial ROM data LA [20] Output Address bus LA [23] Output..

• Page 128: Inverter Board

  8. CONNECTOR PIN ASSIGNMENT Inverter Board CN1 (to ECG Control Borad) Pin No. Signal name Direction Description Output 10.4 to 12 V for backlight Ground VREMOTE Output Backlight On/Off output (0 V: Not light, 5 V: Light) VBRIGHT Output Backlight brightness control output (0 V: when bright is set to maximum) Not connected XLCD..

• Page 129: External Input/output Socket

  8. CONNECTOR PIN ASSIGNMENT External Input/Output Socket SIO Socket Pin No. Signal name Direction Description Ground for main unit Output Transmission data Input Receiving data Output Request to send Input Clear to send Input Data set ready Ground for signal Input With modem = DCD Without modem = Short to 4-pin..