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1. CAUTION Always install the battery even when the cardiograph operates on AC power Otherwise sudden power down occurs when any electrode is detached during recording 1 16 Service Manual ECG 9620 Composition Standard Components ECG 9620L ECG 9620M ECG 9620N ECG 9620P ECG 9620S ECG 9620T ECG 9620U Options Service Manual ECG 9620 1 GENERAL Record Assy Paper senser board Motor Assy Motor sensor board RHC 0042 Magazine Assy RKC 0001 220 RKC 0002 230 0003 240 220 V for L and P version 230 V for M version Transfer Assy 240 V for N version Transfer Assy Transfer Assy Transfer Assy Transfer Assy Transfer Assy RKC 0004 110 RKC 0005 120 RKC 0006 127 UTC 0006 Key board UTC 0007 ECG control board UTC 0008 Power board 110 V for S version 120 V for T version 127 V for U version 2 fs Cart Patient Cable Hanger 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 1 GENERAL Location gt 0 lt D Thermal Head Assy Motor Assy ECG control board Key board Power board Service Manual ECG 9620 1 18 Section 2 Maintenance Replacement x 2 1 Periodic Replacement Schedule sss eene 2 1 Clean
2. 4 25 Board Unit u u s ssssessssasanssswssssassspsaaapaa 5C 1 Block ee el 5 1 Powar UNII u r uu M 5 2 ECG Control Boardi M 5 2 6 1 Before YOu RM 6 1 Warnings and 6 1 aes EE 6 1 Cable ai 6 2 Removing the Upper 64 Removing the Magazine and Recording 6 4 Removing the Battery Pack eee 6 4 Removing the Upper nennen rennen 6 4 Removing the Thermal Head and Motor 6 5 Removing the Thermal 6 5 Service Manual ECG 9620 Section 7 Section 8 CONTENTS Removing the Motor Assy 6 6 Removing the ECG Control Board zu esee aa 6 6 Removing the Power Board uuu Lee prie ta due p E EE Due 6 8 Removing the Power Board 4 4444400 nnne nnns 6 8 Replacing the Power Fuse and Batt
3. 2 6 Service Manual ECG 9620 Section 3 Troubleshooting and System Error Message Troubleshooting Flowchart SEENA 3 1 5 er EET 3 4 Troubleshooting General Operation 3 4 Troubleshooting Recording 3 6 System Error ccn net diia tee 3 7 Service Manual ECG 9620 3C 1 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 NOTE If the power is not turned off by pressing the Power key press and hold the Power key 5 seconds or more Troubleshooting Flowchart Use the troubleshooting flowchart to find the possible sources of a problem The power LED is on but there is no LCD display Check that the LCD cable is Normal The LCD unit is faulty s gt connected to the CNJ201 The key board is faulty connector on the key board The ECG control board is faulty Check that the CNA013 cable is connected to the The key board is faulty CNJ033 connector on the ECG control board and The ECG control board is faulty CNJ101 connector on the key board Service Manual ECG 9620 3 1 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE The power of the instrument does not turn on Does the instrument oper
4. Removing the Upper Casing 2 Disconnect the 11 CNA012 CNA013 014 and speaker cables from the ECG control board CNAO1 1 cable 012 cable 013 cable Speaker cable ECG control board 3 Remove the six M3 pan screws with washers which fasten the ECG control board to the lower casing and remove the ECG control board Service Manual ECG 9620 6 7 6 DISASSEMBLY Removing the Power Board Removing the Power Board 1 Remove the battery pack and upper casing from the lower casing Refer to Removing the Upper Casing 2 Remove the ECG control board Refer to Removing the ECG Control Board 3 Remove the two M3 pan screws with washers and four M3 spacer bolts which fasten the shield plate to the lower casing and remove the shield plate pan screw with spring washer M3 spacer bolt 9 hield Power board Shield plate Power cable 4 Remove the M3 pan screw with washer which fastens the Power board to the lower casing and remove the power unit 5 Disconnect the power cable from the power board 6 8 Service Manual ECG 9620 6 DISASSEMBLY Replacing the Power Fuse 1 Remove the power board from the lower casing Refer to Removing the and Battery Fuse Power Board 2 Turn the power board over 3 Replace the battery fuses with a new one 4 Replace the power fuse with a new one Power fuse Battery
5. section Faulty motor Replace the motor Faulty ECG control board Replace the ECG control board 4 9 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 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 fee H_XXKX XB XXXX XXXX XXX PH Doxx Check Procedure for Characters H and X Check that all the parts of the characters and X are clearly evenly and completely printed and that the characters are not printed zigzag or diagonally Possible Source of Problem Corrective Action The thermal head recording resolution is not set correctly Adjust the thermal head recording resolution as described in this section Faulty cable connection Check the following cable connection CNAO14 between the ECG control board and power board 012 CNJ033 connector on the ECG control board Faulty power board Replace th
6. MRI examination Do not install this cardiograph in an MRI examination room The cardiograph may not operate properly due to high frequency magnetic noise from the MRI When performing MRI tests remove from the patient all electrodes which are connected to this cardiograph Failure to follow this warning may cause serious electrical burn on the patient due to local heating caused by dielectric electromotive force For details refer to the instruction manual for the When performing defibrillation Before defibrillation remove all electrodes and gel from the chest of the patient If the defibrillator paddle touches electrodes or gel the discharged energy may burn the patient s skin Before defibrillation all persons must keep clear of the bed and must not touch the patient or any equipment connected to the patient Failure to follow this warning may cause serious electrical burn shock or other injury Service Manual ECG 9620 Installation Service Manual ECG 9620 1 GENERAL Warning continued Use only the following specified patient cables when using with a defibrillator or ESU When the specified patient cable is connected the cardiograph is type CF defibrillation proof compliance Failure to follow this warning will cause serious electrical burn where the electrode is attached and damage the cardiograph due to discharge energy when defibrillation is performed Patient cable 9010 IEC standard 3 mm di
7. 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 ESR Preparation A locally made check jig is required for the test To make the check jig short circuit the pins as shown below Connector Pin Assignment 1 FG TXD Hl RTS CTS DSR GND HS DTR poo e Ov Um e US OBS Mating Connector Connector HDEB 9PF 05 Case HDE CTH Service Manual ECG 9620 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 To print the test result without quitting 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 test number 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 Communic
8. Faulty LCD unit Replace the LCD unit Faulty key board Replace the key board Faulty ECG control board Replace ECG the control board The instrument does not operate on AC power Faulty power fuse Replace the power fuse Faulty cable connection Check the following cable connection 013 between the ECG control board and key board 014 between the power board and ECG control board Power cable between the power board and power transformer unit Faulty power cord Replace the power cord Faulty power board Replace the power board Faulty key board Replace the key board Faulty ECG control board Replace ECG the control board Faulty power transformer unit Replace the power transformer unit 3 4 Service Manual ECG 9620 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Problem Possible Cause Action The instrument does not operate on battery power The battery is not charged Charge the battery Faulty battery fuse Replace the battery fuse Faulty battery Replace the battery Check the following cable connection CNAO13 between the ECG control board and key board CNAO14 between the power board and ECG control board Battery cable CNJ102 connector on the power board Faulty power board Replace the power board No key operation Faulty cable connection Check t
9. manual Type CF applied part Equipotential terminal Serial number 4 Serial input output terminal Date of manufacture Input terminal for analog signal Output terminal for analog signal 9 Eject magazine release button Patient cable Symbol Description Symbol Description Attention consult operator s manual Defibrillation proof Type CF applied par 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 Service Manual ECG 9620 Operation panel Symbol Description Symbol Description Ny Alternating current L L Rhythm 5 On only for a part of Xo equipment 6 only for a part of 0 Sex equipment 7 gt 1 Battery charging DO gt Paper feed Mark 8 Battery check Filter 9 gt Copy Calibration Automatic Manual control F1 F1 function key CLR Clear F2 F2 function key Start Stop recording F3 F3 function key ENT Enter Mode On screen Symbol Description e QRS sync mark CAL mark vi A key with a numeric number is used to enter numbers in the System Setup screen and paient information Service Manual ECG 9620 Section 1 General MMU CUA CUNO pH 1 1 General Informat
10. pips alarm sound and the Invalid number Please re enter number error message is displayed as shown below Enter test number Press Start Stop key to start test Test number Invalid number Please re enter number To re enter the system test number do either of the following Delete the previously entered number by pressing the Auto Manual key Enter the system test number by overwriting the previously entered number 4 5 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 After a system test is completed you can execute other system test without exiting the System Test mode Exiting the System Test After all desired system tests are finished press the Power key Mode 4 6 Service Manual ECG 9620 Demonstration Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING This is used to learn or demonstrate 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 Procedure Enter the system test numbe
11. A dirty thermal head can cause some parts to be unevenly or incompletely printed 2 If this does not fix the problem 1 Clean the thermal head with the thermal head cleaner pen replace the thermal head A faulty thermal head can cause some parts at a certain position to be unevenly or incompletely printed 2 If this does not fix the problem 1 Clean the thermal head with the thermal head cleaner pen replace the thermal head Check Procedure for Paper Speed Scales Check that the accuracy of each paper speed during actual recording is within 2 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 39 2 mm to 40 8 mm Possible Source of Problem Corrective Action Badly positioned thermal head 1 Adjust the thermal head position 2 If this does not fix the problem replace the thermal head Damaged deformed or badly positioned motor gear 1 Check the motor gear and its position 2 If this does not fix the problem replace the motor gear Dirty motor rotation sensor Clean the motor rotation sensor as described in the Maintenance section Loose or damaged axle Tighten and check the axle as described in the Disassembly and Assembly
12. 220 V for L and P version Transfer Assy 230 V for M version Transfer Assy 240 V for N version Transfer Assy 110 V for S version Transfer Assy 120 V for T version Transfer Assy 127 V for U version Service Manual ECG 9620 7 REPLACEABLE PARTS LIST Service Manual ECG 9620 7 3 Section 8 Connector Pin Assignment Connector Pin 8 1 Attaching the Ferrite 8 1 u E a ame e d ear 8 2 GRO OUT 8 2 51 8 2 Service Manual ECG 9620 8C 1 8 CONNECTOR PIN ASSIGNMENT Connector Pin Assignment Attaching the Ferrite Core CAUTION When connecting an external instrument to connectors marked with A the external instrument and this cardiograph must be connected according to the IEC60601 1 1 Medical electrical equipment Part 1 1 General requirements for safety Collateral standard Safety requirements for medical electrical systems Failure to follow this warning may cause electrical shock to the patient and operator When the cardiograph operates on battery power and large leakage current is input from the connected external instrument ground the cardiograph or use an isolation transformer for the external instrument Failure to fo
13. 901D 2 pin CNJ102 3 pin Service Manual ECG 9620 5 1 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 5 V for digital circuits 12 V for analog circuits 24 to 30 V for thermal head ECG Control Board The ECG Control board consists of the following components Component Description CPU ROM DRAM Flash memory Real time clock Timer Serial interface Speaker circuit Interrupt request Interface Recorder LCD Controller A D converter 5 2 MC68ECO020 Operating frequency 25 MHz For system software 2 MB Main memory 4 MB 16 MB with 140 B SRAM and back up battery lithium battery ms timer Interrupt request signal ON OFF selectable Operation mode fixed Equivelent to RS 232C 1 channel Baud rate 2 400 to 115 200 bps selectable Beep sound Sound by noise generator Auto vector method To ECG input section For keyboard Service Manual ECG 9620 Section 6 Disassembly Before You Begin iei rne dau dna so Fase XE 6 1 Warnings and 6 1 lat Uie 6 1 Cable Connection 6 2 Removing the Upper Casing uui 6 4
14. Panel k u EET 1 15 RighiSide Pamel E 1 15 Rear uy u isu aq 1 16 RUE ER 1 17 Standard COMPOMOMts secos e 1 17 SM 1 17 Boecl 1 18 POEMEEC U 7 nnne 2C 1 Replacement EE 2 1 Periodic Replacement 2 1 Cleaning and 2 2 oe e e 2 2 Cleaning and Greasing 5 2 2 Cleaning the Paper Mark Sensor and Paper Empty 2 2 Cleaning the Motor Rotation Sensor and Lubricating the Motor Gear and Gear Meshed with Motor 2 3 Maintenance 5 nn Le Ene a 2 5 Section3 Troubleshooting and System Error Message 3C 1 Troubleshooting 3 1 Troubleshooting a I eh 3 4 Troubleshooting General Operation Problem sss 3 4 Service Manual ECG 9620 C 1 5 Section 4 Section 5 Section 6 C 2 Troubleshooting Recording 3 6 System Error Message rc a sop eid ee ie 3 7 System T
15. Protective earth resistance check Earth leakage current check Enclosure leakage current check Patient leakage current check Withstanding voltage check Test equipment When repairing or calibrating the instrument the following test equipment is required Oscilloscope 2 channels or more for input signal 50 mV to 5 V input range 1 10 attenuating probe and 100 MHz or more frequency response characteristic must be provided Digital voltmeter standard type An oscilloscope can be used instead of the digital voltmeter 1 5 1 GENERAL General Safety Information 1 6 DANGER Never use this cardiograph in the presence of any flammable anesthetic gas or high concentration oxygen atmosphere Failure to follow this warning may cause explosion or fire Never use this cardiograph in a high pressure oxygen medical tank Failure to follow this warning may cause explosion or fire WARNING Using with an electrical surgical unit ESU Never use this cardiograph near an ESU The cardiograph may malfunction due to high frequency noise from the ESU When using this cardiograph with an ESU refer to the instruction manual for the ESU Before measurement check that the return plate is correctly attached to the patient and check that the cardiograph operates correctly when using with the ESU If the return plate is not attached correctly it may burn the patient s skin where the electrodes are attached
16. This subsection describes the cleaning and lubrication procedures for parts that must be cleaned and lubricated 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 Lubricating To maintain the performance of the instrument the parts listed in the table below Schedules must be regularly cleaned or lubricated Part Frequency Performed by Instrument external After each use User Thermal Head Once a month User Platen Roller assy Once a year User Paper 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 Cleaning the Paper Mark Sensor and Paper Em pty 1 Remove the magazine The illustration below shows the location of the paper Sensor sensor 2 Use a piece of cotton moistened with alcohol to clean both sensors Paper sensor 2 2 Service Manual ECG 9620 Cleaning the Motor Rotation Sensor and 2 MAINTENANCE 1 Remove the upper casing from the lower casing Refer to Removing the Upper Casing in Section 6 Lubricating the Motor Gear and Gear Meshed with Motor Gear Motor assy 2 Remove the two M3 pan screws with washers and spring washers which fasten the ground leads to the power transformer unit Ground lead M3 binding hea
17. between the input ECG signal and output signal When the cardiograph operates on battery power and large leakage current is input from the connected external instrument ground the cardiograph or use an isolation transformer for the external instrument Failure to follow this caution may cause electrical shock to patient and operator Use only the KD 103E cart for the cardiograph When another cart is used the cardiograph may fall off or the cart may tip over 1 GENERAL Maintenance Caution continued Never use the cardiograph with its side panel downward Failure to follow this caution may cause the cardiograph to fall over or cause battery liquid leakage NOTE When using the battery pack and the battery operation lamp is blinking in orange measurement results may not be saved CAUTION Before maintenance cleaning disinfection make sure that the cardiograph is turned off and the power cord is removed from the AC outlet and cardiograph Otherwise the operator may get an electrical shock and the cardiograph may malfunction Before battery replacement make sure that the cardiograph is turned off and the power cord is removed from the AC outlet and cardiograph Otherwise the operator may get an electrical shock Do not disassemble or repair the cardiograph Disassembly and repair must be performed by qualified service personnel Service Manual ECG 9620 1 GENERAL Specifications ECG input In
18. casing from the lower casing Refer to Head Removing the Upper Casing 2 Remove the two M3 pan screws with washers and spring washers which fasten the ground leads to the power transformer unit 9 Ground lead M3 binding head screw M3 pan screw with washers and spring washer Thermal head unit 012 cable L CNAO11 cable Thermal head 3 Disconnect the CNAO11 and CNAO12 cables from the ECG control board 4 Remove the three M3 binding head screws which fasten the thermal head unit to the lower casing and remove the thermal head unit 5 Remove the two M3 binding head screws washers which fasten the thermal head to the thermal head unit 6 Remove the thermal head 7 Remove the thermal head cable from the thermal head Service Manual ECG 9620 6 5 6 DISASSEMBLY Removing the Motor Assy 1 Remove the thermal head unit from the lower casing Refer to step 1 to 5 in Removing the Thermal Head Unit 2 Remove the two M3 binding head screws which fasten the motor assy to the thermal head unit and remove the motor assy 3 Remove the two M3 pan screws with spring washers which fasten the motor sensor board to the motor assy and remove the motor sensor board Motor assy Motor sensor board 6 6 Service Manual ECG 9620 6 DISASSEMBLY Removing the ECG Control Board 1 Remove the battery pack and upper casing from the lower casing Refer to
19. following cable connection CNAO13 between the ECG control board and key board Faulty cable connection Faulty key board Replace the key board Faulty ECG control board Replace the ECG control board Service Manual ECG 9620 Calibration 4 SYSTEM TEST ADJUSTMENT AND SETTING 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 ERN LT Luxe 0563 3 Service Manual ECG 9620 ix Procedure 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 r
20. maintenance and repairs When the instrument is not functioning properly it should be clearly marked to avoid operation while it is out of order 7 The instrument must not be altered or modified in any way 8 Maintenance and Inspection 1 The instrument and parts must undergo regular maintenance inspection at least every 6 months 2 If stored for extended periods without being used make sure prior to operation that the instrument is in perfect operating condition Service Manual ECG 9620 i 3 Technical information such as parts list descriptions calibration instructions or other information is available for qualified user technical personnel upon request from your Nihon Kohden distributor 9 When the instrument is used with an electrosurgical instrument pay careful attention to the application and or location of electrodes and or transducers to avoid possible burn to the patient 10 When the instrument is used with a defibrillator make sure that the instrument is protected against defibrillator discharge If not remove patient cables and or transducers from the instrument to avoid possible damage WARRANTY POLICY Nihon Kohden Corporation NKC shall warrant its products against all defects in materials and workmanship for one year from the date of delivery However consumable materials such as recording paper ink stylus and battery are excluded from the warranty NKC or its authorized agents will repair or replace an
21. 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 Single 03 Test level 1 04 Test level 1 Continuous 05 Test level 2 If no fault is detected an 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 ut H 5 Like
22. 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 system 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 Corrective Action Faulty ECG control board Replace the ECG control board 4 21 4 SYSTEM TEST ADJUSTMENT AND SETTING System Setup Initialization This is used to reset all the system settings to the factory initial settings NOTE The following settings are not reset to the factory initial settings even if the instrument is initialized date and time display language recording resolution setting hospital cue mark position direct modem connection elapsed time local language font saved ECG data For settings marked with refer to the following corresponding subsection in this section for settings marked with refer to Changing Settings Before Measurement System Setup Screen in the operator s manual Procedure Enter the system test number 10 Test level 1 or 12 Test level 2 and press the Start Stop key If the initialization is completed a System Setup Initialization message a
23. the entire system settings of the instrument which determines the operation conditions of the instrument Refer to the operator s manual for details The date and time is backed up with the lithium battery in a real time clock IC on the ECG control board The life time of the lithium battery is about 7 years When the Error 09 error message appears and the date is reset to January 1 1980 the lithium battery is completely discharged Replace the ECG control board and set the date and time Setting the Date and Time 1 Call up the System Setup mode 1 If the power is on turn it off NOTE Release the Feed Mark key immediately after the instrument starts printing If you 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 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 Input getting
24. to wrap the board or unit of the instrument Handling the instrument Because the outside surface of the instrument is made of resin the outside surface of the instrument is easily damaged So when handling the instrument remove clutter from around the instrument and be careful to not damage the instrument or get it dirty Because most of the boards in the instrument are multilayer boards with surface mount electrical devices SMD a special tool is required to remove and solder the electrical devices on it To avoid damaging other electrical components do not remove and solder SMD components yourself Measuring and Test Equipment Maintain the accuracy of the measuring and test equipment by checking and calibrating it according to the check and calibration procedures 1 3 1 GENERAL Service Policy Service Parts and Patient Safety Checks Service Policy Service Parts 1 4 Our technical service policy for this instrument is to replace the faulty unit board or part or damaged mechanical part with a new one Do not perform electrical device or component level repair of the multilayer board or unit We do not support component level repair outside the factory for the following reasons Most of the boards are multilayer boards with surface mount electrical devices so the mounting density of the board is too high A special tool or high degree of repair skill is required to repair the multilayer boards with sur
25. water and see your physician Never rub your eyes otherwise you may lose your eyesight Only charge the battery pack with the ECG 9620 cardiograph If any other battery charger is used abnormal current flows and the substance liquid inside the battery leaks and the battery explodes Do not connect the battery pack to an AC outlet or lighter socket in a car The substance liquid inside the battery leaks out and the battery pack explodes The battery has and polarity Make sure that the battery is installed with the correct polarity direction Otherwise the substance inside the battery leaks out and the battery pack explodes Use only the SB 901D battery pack WARNING Do not immerse the battery pack in water or seawater The battery heats up and rusts and the substance liquid inside the battery leaks Never use a battery pack which is damaged discolored or has leakage A damaged battery pack explodes if used Do not leave the battery pack unused for more than one year The battery may leak Service Manual ECG 9620 Operation Service Manual ECG 9620 1 GENERAL CAUTION Do not charge the deteriorated battery pack Otherwise the cardiograph cannot operate on battery power Do not expose the battery pack to direct sunlight or leave in a high temperature place The life time of the battery pack may be shortened the performance of the battery pack may be degraded and the substance liquid inside the ba
26. waveforms are displayed correctly NOTE 3 8 Error 05 also appears when any key on the operation panel is pressed and held down e When Error 08 appears the following settings are not reset to the factory initial settings even if the instrument is initialized display language hospital name recording resolution setting local language font hum filter direct modem connection elapsed time saved ECG data Service Manual ECG 9620 Service Manual ECG 9620 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 Syste formation Error History 3 9 Section 4 System Test Adjustment And Setting System DOSE cass DEDE 4 1 Overall ieee ederet detener ea sane 4 1 Calling up the System Test Level 1 4 2 Callin
27. year 1998 is saved Input getting number Enter getting number and press Start Stop key If you entered an unspecified number 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 following 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 settings 6 Turn the power of the instrument off to exit the System Setup mode 4 27 Section 5 Board Unit Description Block DIagralfi iu tae eee 5 1 5 2 u aa Mi Tel 5 2 Service Manual ECG 9620 5 1 5 BOARD UNIT DESCRIPTION Block Diagram CNJ021 80 pin CNJ032 2 pin CNJ031 9 SIO connector CNJ043 miniature plug External input connector CNJ036 10 pin CNJO41 miniature plug CRO output connector 012 Thermal head CNJ101 34 pin Key board CNJ201 12 pin CNJ033 24 CNJO11 16 pin 013 ECG control board LCD Patient cable connector CNJ091 D sub 15 CNJ035 30 014 CNJ201 30 pin AC socket Battery Power board CNJ1 01 transformer unit SB
28. 303611 Nihon Kohden Italy S r l Via San Tomaso 78 24121 Bergamo Telephone 39 35 219543 Fax 39 35 232546 Nihon Kohden Singapore Pte Ltd 70 Shenton Way 14 05 Marina House Singapore 079118 Telephone 65 6224 6700 Fax 65 6224 6216 The model and serial number of your instrument are identified on the rear or bottom of the unit Write the model and serial number in the spaces provided below Whenever you call your distributor concerning this instrument these two pieces of information should be mentioned for quick and accurate service Model lJ emus Serial number YOUR DISTRIBUTOR PRINTED IN JAPAN
29. ECG 9620L SERVICE MANUAL ECG 9620M ECG 9620N ECG 9620P 96205 ECG 9620T ECG 9620U cardiofax ELECTROCARDIOGRAPH ECG 9620 08CK2 782 00516 KOHDEN CONTENTS Contents GENERAL HANDLING PRECAUTIONS i WARRANTY POLIG Y ettet zeit nee oreet dk ee rn tu eR i EMC RELATED CAUTION iii Conventions Used in this Manual and Instrument sss iv Dangers Warnings Cautions and iv Explanations of the Symbols in this Manual and Instrument V 1 1 e uuu E T E E 1 1 General Information on Servicing a a 1 2 Service Policy Service Parts and Patient Safety Checks 1 4 Service Poll y EE 1 4 Service PANTS qasa 1 4 Patient Safety Checks iie pe tiec 1 5 Maintenance Equipments and Tools sse 1 5 Hinton ha HEURE 1 6 AE 1 11 Panel DGSCriPUOM e E 1 14 Front Panel 1 14 Side 1 14 Operation
30. EFES Service Manual ECG 9620 Single Memory Test Mode Continuous Memory Test Mode Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING 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 is automatically printed When the test result is 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 press the Auto Manual key Check Procedure for Single Memory Test Mode Check that no Error messages appear Possible Source of Problem Corrective Action Faulty memory on the ECG control board Replace the ECG control board Each memory mounted on the ECG control board cannot be replaced at memory component level 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 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 cance
31. EST ADJUSTMENT AND SETTING Input Unit Input check jig 4 16 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 1 Input unit test result ACRE Normal I EEC IZ CERE H Cl Normal Normal Normal Hea i 4 Normal iE _ Norma 1 C6 E Normal a 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 Manual key The instrument returns to the stanby mode for entering the system test number Check Procedure for Input Unit Test Check that the lead off condition is detected correctly Possible Source of Problem Corrective Action Check the
32. JO91 D sub 15 pin CNJO35 30 pin 014 CNJ201 30 pin AC socket Battery Power board 01 transformer unit SB 901D 2 pin CNJ102 3 pin 6 2 Service Manual ECG 9620 6 DISASSEMBLY Code No Description 011 085 3 670 00216 ZHR 10 L 120 90 130 between motor assy and ECG control board 012 08SK3 670 00181B PHR 16 L 80 between thermal head and ECG control board CNA013 08SK3 670 00172A PHDR 24VS W 100 between key board and ECG control board CNAO0I4 08SK3 670 00199B SHDR 30V S B W 60 between power board and ECG control board CNAO 11 cable CNAO12 cable CNA013 cable Service Manual ECG 9620 6 3 6 DISASSEMBLY Removing the Upper Casing Removing the Magazine 1 Press down the magazine release button to open the magazine and Recording Paper 2 Remove magazine and recording paper into the magazine Removing the Battery Pack 1 Remove the two binding head screws from the battery cover 2 Open the battery cover by sliding it up as shown in the figure 3 Disconnect the battery cable from the battery pack connector 4 Remove the battery pack from the battery compartment Removing the Upper 1 Remove the five M3 binding head screws Casing 2 Open the upper casing in the direction of the arrow 6 4 Service Manual ECG 9620 6 DISASSEMBLY Removing the Thermal Head Motor Assy Removing the Thermal 1 Remove the battery pack and upper
33. Model Instrument Serial Number Hardware Revision Software Revision Overview Outside of instrument is clean Yes No No loose screws Yes No No physical damage no bent parts and no contact with liquid Yes No Operation panel is not torn or broken Yes No All keys buttons and controls are undamaged Yes No Power cord patient cable are not frayed and are correctly connected to the instrument Yes No Paper magazine opens and closes correctly Yes No Thermal head is clean Yes No The paper feeding roller is clean Yes No Motor rotation sensor is clean Yes Not Paper detection sensor is clean Yes No Motor gear is lubricated properly Yes No Accessories Enough electrolyte cream CardioCream Yes No Enough recording paper Yes Installation Instrument is installed in the proper location Yes No Specified 3 prong power cord and ground lead are used Yes No Battery pack is in the instrument Yes Recording paper is loaded Yes Power There is fire smoke or smell Ye Noti There is no electrical shock when touching the instrument Yes No Instrument is not abnormally hot Yes Instrument does not affect surrounding equipment Yes AC lamp lights when the power is supplied Yes No Battery charge lamp lights when the AC power is supplied Yes No Basic operation screen display is correct brightness no distortion Yes No Key lamp indication is correct Yes No keys o
34. Removing the Magazine and Recording Paper 6 4 Removing the Battery 6 4 Removing the Upper Casing iiec reor Ett ens aides 6 4 Removing the Thermal Head and Motor 044 6 5 Removing the Thermal 6 5 Removing the Motor ASSY 6 6 Removing the ECG Control 6 6 Removing the race 6 8 Removing the Power Boatd te cett eed Saeed A 6 8 Replacing the Power Fuse and Battery Fuse 6 9 Removing the Key Board and LCD 6 10 Service Manual ECG 9620 6C 1 Before You Begin Warnings and Cautions Required Tools Service Manual ECG 9620 6 DISASSEMBLY 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 WARNINGS 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 Turn the power off and wait 10 minutes before installing to or removing any component f
35. al 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 need to understand the operation of the instrument in order to effectively use the information in the service manual 1 1 1 GENERAL General Information on Servicing 1 2 Note the following information when servicing the instrument CAUTIONS Safety There is the possibility that the outside surface of the instrument such as the operation keys could be contaminated by contagious germs so disinfect and clean the instrument before servicing it When servicing the instrument wear rubber gloves to protect yourself from infection There is the possibility that when the lithium battery is broken a solvent inside the lithium battery could flow out or a toxic substance inside it could come out If the solvent or toxic substance touches your skin or gets into your eye or mouth immediately wash it with a lot of water and see a physician Liquid ingress The instrument is not waterproof so do not install the instrument where water or liquid can get
36. ameter tip BJ 902D IEC DIN standard 4 mm diameter tip BJ 903D IEC DIN standard clip BA 901D AHA requirement 3 mm diameter tip BA 903D requirement color clip When using an ESU and defibrillator with the cardiograph use silver chloride disposable electrodes WARNING Only use the 3 prong power cord provided with the cardiograph Failure to follow this caution may cause electrical shock to the patient and operator Only use the specified patient cable and connect the external instruments with the specified installation procedure Failure to follow this warning may cause a serious electrical shock to the patient and operator by leakage current CAUTION When the provided 3 prong power cord cannot be used operate the cardiograph on battery power When another type of power cord especially 2 prong power cord is used this may cause electrical shock to the patient and operator When several medical instruments are used together ground all instruments at the same one point ground to protect the patient and operator from electrical shock Any potential difference between instruments may cause electrical shock to the patient and operator When connecting an external instrument to connectors marked with A the external instrument and this cardiograph must be connected according to the IEC60601 1 1 Medical electrical equipment Part 1 1 General requirements for safety Collateral standard Saf
37. ate during AC power operation Does the LED of the AC power light Check the following cable connections Between transformer unit and power board CNAO14 between the power board and ECG control board e CNAO13 between the ECG control board The key board is faulty and key board The ECG control board is faulty The power board is faulty Check the power fuse in the fuse holder Normal power board is faulty power transformer is faulty The instrument does not operate during battery power operation No Is the battery charged Charge the battery Check the following cable connections Between transformer unit and power board CNA014 between the power board and ECG control board e between the ECG control board and key board N ie Is the battery F101 or F102 Yes Replace the battery fuse fuse on the power board blown on the power board The power unit is faulty The power transformer is faulty 3 2 Service Manual ECG 9620 recorder does not feed the recording paper when the Start key is pressed Lights Does the recorder print when the recording paper is manually pulled out from under the thermal head Check that CNA011 cable is connected to the CNJ036 connector on the ECG control board Normal e The motor is faulty The ECG control board is faulty Service Manual ECG 9620 Does the LED for the Star
38. ation Check that no error messages appear Possible Source of Problem Corrective Action Faulty ECG control board Replace the ECG control board Service Manual ECG 9620 4 19 4 SYSTEM TEST ADJUSTMENT AND SETTING CRO EXT1 4 20 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 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 test result CRO EXT1 test result o E HS Eske Preparation A locally made check jig is required for the test To make the check jig use the two 3 50 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 9620 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING Procedure 1 Connect
39. d screw Thermal head unit Ts M3 pan screw with washer and spring washer 012 cable L CNAO11 cable 3 Disconnect the CNAO11 and CNAO12 cables from the ECG control board 4 Remove the three M3 binding head screws which fasten the thermal head unit to the lower casing and remove the thermal head unit 5 Remove the two M3 binding head screws which fasten the motor assy to the thermal head unit and remove the motor assy 6 Remove the two 3 pan screws with spring washers which fasten the motor sensor board to the motor assy and remove the motor sensor board 7 Use a piece of cotton moistened with alcohol to clean the motor rotation Sensor 8 Usea brush to clean the holes in the gear Motor sensor board Service Manual ECG 9620 2 3 2 9 Use grease to lubricate 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 2 4 Service Manual ECG 9620 2 Maintenance Check Sheet 1 2 Date Customer Customer Address Service Personnel Service Company Instrument Name Instrument
40. e ECG control board Sometimes the recorder does not print The thermal head protection circuit which protects the thermal head from large artifact such as AC interference is rejecting noisy waveforms Check the electrode attachment If necessary adjust the electrode position so that clear ECG waveforms are displayed The paper skews Dirty thermal head Clean the thermal head The recording paper is not properly set in the instrument Make sure that the recording paper is aligned with the lower recording paper guide The thermal head is incorrectly positioned Readjust the position of the thermal head Faulty feeding roller Replace the paper magazine 3 6 Service Manual ECG 9620 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 or printed due to transient noise After printing the system information and error history the power of the instrument is automatically turned off NOTE If the same system information appears again after restarting the instrument do not use the instrument until service personnel has corrected the cause of the problem Sending a copy of the sy
41. e power board The thermal head unit position is not correct Check and adjust the thermal head unit position 4 10 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT 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 following e Power key Check that the power of the instrument is on or off when the Power key is turned on or off e 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 Corrective Action Faulty key board Replace the key board Service Manual ECG 9620 4 11 4 SYSTEM TEST ADJUSTMENT AND SETTING Memory 4 12 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
42. ery 6 9 Removing the Key Board and LCD 6 10 Replaceable Parts List J T J 7C 1 E EE Em 7 2 Connector Pin Assignmen i 8 1 Attaching the Ferrite 8 1 EX EIN G rifieel orf 2 usa E RR 8 2 CRO OUT CONNECCION sinnini 8 2 SIO GOMMECION e AE E T E 8 2 Service Manual ECG 9620 GENERAL HANDLING PRECAUTIONS This device is intended for use only by qualified medical personnel Use only Nihon Kohden approved products with this device Use of non approved products or in a non approved manner may affect the performance specifications of the device This includes but is not limited to batteries recording paper pens extension cables electrode leads input boxes and AC power Please read these precautions thoroughly before attempting to operate the instrument 1 safely and effectively use the instrument its operation must be fully understood 2 When installing or storing the instrument take the following precautions 1 Avoid moisture or contact with water dust extreme atmospheric pressure excessive humidity and temperatures poorly ventilated areas and saline or sulphuric air 2 Place the instrument on an even level floor Av
43. ess Unit side JEY 9S 1A2B Code No 390774 Cable side Connector DE 9P Code No 082625 Cover DE C8 J9 F1 1 Code No 336708 Pin No Signal Shield TxD RxD RTS CTS DSR GND DCD DTR O FW NY Pin Personal conputer 1 Shield 2 TxD 3 RxD 4 RTS 5 CTS 6 DSR 7 GND 8 to 19 Not used 20 DTR 21 to 25 Not used Pin assignment may depend on the shape of connectors for PCs To connect a modem use a dedicated cable 15 m or shorter Service Manual ECG 9620 Nihon Kohden Corporation Head Office 31 4 Nishiochiai 1 chome Shinjuku ku Tokyo 161 8560 Japan International Division Sales Department Tokyo Head Office Telephone 81 3 5996 8036 Facsimile 81 3 5996 8100 Nihon Kohden China Service Centers DRSI 58 169 S MLAB 3008 Bis 021 6469 9016 021 6486 7218 AC AEG 1657554 8 601 010 6804 9531 010 6804 7366 pF NEU 371 375 RDS 2516 020 8777 9108 f E 020 8778 1882 80 2409 20 S FAIS 024 2340 2565 f E 024 2383 2557 805 5 25 10110 420 iS 028 773 6236 028 773 6236 Nihon Kohden America Inc 90 Icon Street Foothill Ranch CA 92610 USA Telephone 1 949 580 1555 Fax 1 949 580 1550 Nihon Kohden Europe GmbH European Representative SaalburgstraBe 157 B rohaus 1 D 61350 Bad Homburg v d H Germany Telephone 49 6172 309200 Fax 49 6172
44. est Adjustment and Setting 4C 1 Systemi RR E 4 1 4 1 Calling up the System Test Level 1 2 4 2 Calling up the System Test 2 4 3 Entering the System Test Number sessi 4 4 Executing the Systemi 4 5 Quitting the System 4 6 Exiting the System Test Mode aa au au ua 4 6 EEE geb 4 7 iet m EE 4 8 Thermal Hoad u 4 10 M MP 4 11 AUCI E OH 4 12 Single Memory Test Mode 2 04 244 0 nennen nnns 4 13 Continuous Memory Test 4 13 4 14 asan abba 4 16 4 17 ines 4 18 qup Cm uU MN 4 20 System Setup lInitialization irit ito etre ee ae hen 4 22 EGG Findings List Recording secret ipee ERE Re e eR 4 23 Recording Resolution Setting 4 24 Date and Setling s ee 4 25 Setting the Date and
45. eturns 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 Waveforms Check that all the rectangular printed CAL waveforms match the following conditions in the illustration below e Amplitude when CAL waveform is risen 10 mm 2 Amplitude of point which is 25 more than 7 3 mm from the rising point of the CAL waveform 10 mm 2 25 gt more than 7 3 mm Possible Source of Problem Corrective Action Faulty ECG control board Replace the ECG control board 4 17 4 SYSTEM TEST ADJUSTMENT AND SETTING Communication 4 18 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
46. ety requirements for medical electrical systems Failure to follow this warning may cause electrical shock to the patient and operator When inserting or removing the battery from the cardiograph make sure that the cardiograph is turned off Otherwise the patient and operator may get an electrical shock 1 7 1 GENERAL Battery Pack 1 8 DANGER Keep the battery pack away from fire Do not heat the battery pack Otherwise the substance liquid leaks out and the battery pack explodes Never short circuit the and terminals on the battery pack with wire Never store or carry the battery pack with metal such as necklace or hair pins The battery pack short circuits and a large current flows causing leakage of the substance liquid inside the battery and battery explosion Never disassemble or modify the battery pack Never damage or directly solder the sheath tube The battery pack short circuits the substance liquid comes out and the battery pack explodes Do not use a battery pack which is damaged such as from falling There is a gas discharge valve inside the battery and if this valve is damaged the gas cannot be discharged causing the battery pack to explode Do not subject the battery pack to a strong mechanical shock The susbstance liquid inside the battery leaks and explodes If the battery pack is damaged and substance liquid inside the battery contacts the eyes or skin wash immediately and thoroughly with
47. face mount electrical devices Only disassemble the instrument or replace a board or unit in an environment where the instrument is protected against static electricity Refer to Replaceable Parts List of this manual for the service parts for technical service that we provide NOTE When ordering parts or accessories from your Nihon Kohden representative please quote the NK code number and part name which is listed in this service manual and the name or model of the unit in which the required part is located This will help us to promptly attend to your needs Always use parts and accessories recommended or supplied by Nihon Kohden Corporation to assure maximum performance from your instrument Service Manual ECG 9620 Patient Safety Checks Maintenance Equipments and Tools Service Manual ECG 9620 1 GENERAL Periodic maintenance procedures and diagnostic check procedures are provided in this manual to ensure that the instrument is operating in accordance with its design and production specifications To verify that the instrument is working in a safe manner with regard to patient safety patient safety checks should be performed on the instrument before it is first installed periodically after installation and after any repair is made on the instrument For patient safety checks perform the following checks as described in the IEC60601 1 Medical electrical equipment Part 1 General requirements for safety
48. fuse Power fuse Code No Description ECG 9620L M N P 274035 218 250 0 25 A ECG 9620S T U 104665 218 500 0 5 A Battery fuse Code No Description F101 540657 239 001 1 A F102 323241 218 008 8 A Service Manual ECG 9620 6 9 6 DISASSEMBLY Removing the Key Board and LCD Unit 1 Remove the battery pack and upper casing from the lower casing Refer to Removing the Upper Casing M3 pan screws with spring washer and washer LCD ground spring LCD unit CNA013 cable Key board 2 Disconnect CNAO013 cable from the key board 3 Disconnect the LCD cable from the key board 4 Remove the six M3 pan screws with spring washers and washers which fasten the LCD unit to the upper casing and remove the LCD unit two LCD ground spring and two LCD ground plates 5 Remove the four M3 pan screws with spring washers and washers which fasten the key board to the upper casing and remove the key board 6 10 Service Manual ECG 9620 Section 7 Replaceable Parts List ERREUR m 7 2 Service Manual ECG 9620 7C 1 Service Manual ECG 9620 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 This will help us to p
49. g up the System Test 2 4 3 Entering the System Test 4 4 Executing the 4 5 Quitting the System Test 4 6 Exiting the System Test wii ss creed inte eG t ace deere 4 6 e 2 aa 4 7 Recodo i EE 4 8 4 10 Msc ETE 4 11 4 12 Single Memory Test trea Renee E tee 4 13 Continuous Memory Test 4 13 EGD EED 2 15 ee A ee 4 14 stt E 4 16 4 17 Comiti ation eoe tta 4 18 ROME Kins TEES 4 20 System Setup 1 4 22 ECG Findings List Recording 4 23 Recording Resolution Setting 4 24 Date and Mime Seting au uu eek asides 4 25 Setting the Date 4 25 Service Manual ECG 9620 4C 1 System Test Overall Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING This section describes e how to check the operation of the instrument in the System Test mode e how to output the ECG findings lis
50. he following cable connection CNAO13 between the ECG control board and key board CNAO14 between the power board and ECG control board Faulty key board Replace the key board Faulty ECG control board Replace ECG the control board No ECG waveform appears in a specific lead or artifact appears on the waveform Faulty electrode attachment Check that the electrodes are properly attached to the patient Faulty patient cable connection Check that the patient cable is firmly connected to the electrodes and instrument Faulty ECG control board Replace the ECG control board No ECG waveform appears in all channels or artifact appears on the waveform No electrode is attached to the patient or the RF RL electrode is not attached to the patient Check that the electrodes are properly attached to the patient Faulty ECG control board Replace the ECG control board Vertical and horizontal stripes appear on the LCD screen at constant interval Faulty cable connection Check the following cable connection 013 between the ECG control board and key board LCD cable CNJ201 connector on the key board Faulty ECG control board Replace the ECG control board Faulty LCD unit Replace the LCD unit No sound Faulty cable connection Check that the speaker cable is firmly connected to CNJO32 connector the ECG control board Fa
51. ing Battery pack 10 to 85 RH non condensing Recording paper 10 to 90 RH non condensing Storage atmospheric pressure 70 to 106 kPa Electromagnetic compatibility IEC60601 1 2 1993 CISPR11 1990 Group 1 Class B Other Indoor portable Dimensions and weight Dimensions Weight 280 W x 70 H x 216 D mm excluding protrusions Approx 3 1 kg with battery pack Approx 2 7 kg without battery pack Service Manual ECG 9620 1 GENERAL Safety Safety standard IEC60601 1 1998 IEC60601 1 Amendment 1 1991 IEC60601 1 Amendment 2 1995 IEC60601 2 25 1993 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 BJ 903D BA 901D or BA 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 Service Manual ECG 9620 1 13 1 GENERAL Panel Descriptions Front Panel Left Side Panel TZ NIHON KOHDEN 0 5 F 52 diof ee cardiofax CG Name Opera
52. ing and Eubrication sy u 2 2 Cleaning and Greasing Schedules 2 2 Cleaning the Paper Mark Sensor and Paper Empty 2 2 Cleaning the Motor Rotation Sensor and Lubricating the Motor Gear and Gear Meshed with Motor Gear Maintenance Check Sheet Service Manual ECG 9620 2C 1 Replacement Periodic Replacement Schedule Service Manual ECG 9620 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 To maintain the performance of the instrument the parts listed in the table below must be periodically replaced by qualified service personnel Code No Description Recommendation SB 901D Battery pack See below 08SK3 878 00046 Thermal head KYT 56 3MPP1 SKH After 50 km recording RHC 004 Motor Assy After 1000 hours operation Replace the battery pack when it cannot last for 30 minutes during battery operation at the temperatures between 20 and30 C 2 1 2 Cleaning and Lubrication
53. into or fall on the instrument If liquid accidentally gets into the instrument or the instrument accidentally drops into liquid disassemble the instrument clean it with clean water and dry it completely After reassembling verify that there is nothing wrong with the patient safety checks and function performance checks If there is something wrong with the instrument contact your Nihon Kohden representative for repair Environmental Safeguards Depending on the local laws in your community it may be illegal to dispose of the lithium battery in the regular waste collection Check with your local officials for proper disposal procedures Disinfection and cleaning To disinfect the outside surface of the instrument wipe it with a non abrasive cloth moistened with alcohol Do not use any other disinfectants or ultraviolet rays to disinfect the instrument Service Manual ECG 9620 Service Manual ECG 9620 1 GENERAL Caution continued Transport Use the specified shipment container and packing material to transport the instrument If necessary double pack the instrument Also put the instrument into the shipment container after packing so that the buffer material does not get inside the instrument When transporting a board or unit of the instrument be sure to put it in a conductive bag Never use an aluminum bag to transport a board or unit Also never use a styrene foam or plastic bag which generates static electricity
54. ion on 1 2 Service Policy Service Parts and Patient Safety Checks 1 4 Service e H 1 4 REA 1 4 Patient Safety Checks 1 5 Maintenance Equipments and 0 1 5 General Safety Information ooi recede feo E odit co 1 6 1 11 iege m 1 14 iem 1 14 Lett Side Panel undae even ct wedi dees ee ise ra a um Sasia aysan 1 14 Operation Pariel ior reinado eirca Red op d 1 15 Right Side Panel 1 15 ear Panelists ite R 1 16 1 17 Standard 1 17 eub 1 17 Fete HC 1 18 Service Manual ECG 9620 1C 1 Introduction Service Manual ECG 9620 1 GENERAL This service manual provides useful information to qualified service personnel to understand troubleshoot service maintain and repair the ECG 9620L M N P S T U Electrocardiograph referred to as the instrument in this service manual The System test Adjustment and Setting section in this service manu
55. ircuited and prints the system information Error 05 at the end of printing 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 To cancel printing the following information press the Start Stop key Test level 2H E pote tt slim Fige Sel hen T 001 Ld EF Pont Down Load ds pa2c Thermal head OTJ Flash memory ini tialization 1341 ev fat Recordir ng setting OJE single Recording resolution setting 2 42 ry conti iii 051 LEES Recording resolution setti ng 131043 LED is 06 Recording resolution setting 4 44 EHE 107 Recording resolution setting 5 45 f E ibration HE EESEEEDS Rec ording resolution setting 6 46 ER cation ry Recording resolution setting 7 147 SEHE _ 1 101 Recording resolution setting 8 48 System Setur etoh Recording resolution check 49 System Test Screen Service Manual ECG 9620 LN Enter test
56. l 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 is 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 for Continuous Memory Test Mode Check that no Error messages appear Possible Source of Problem Corrective Action Faulty memory on the ECG control board Replace the ECG control board Each memory mounted on the ECG control board cannot be replaced at memory component level 4 13 4 SYSTEM TEST ADJUSTMENT AND SETTING LCD LED 4 14 This is used to check all LEDs on the operation panel LED LCD control circuit and all dots on the LCD First the LCD test starts and after the LCD test is complete the LED test starts LCD Test 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 Returns to the System Test screen The LCD image for each pattern changes as follow A zi LED Test The LEDs on the operation panel light up one by one and remain lit until all LEDs light up After all LEDs light up they go out one 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 d
57. llow this caution may cause electrical shock to patient and operator NOTE When connecting an external instrument to the following connecters an unwanted radio frequency signal is generated from this connection To reduce this unwanted radiofrequency signal attach the optional ferrite core to the cable of the external instrument Example of Wrapping Service Manual ECG 9620 Connector Ferrite core model Code No EXT IN RI 14 28 6 493182 Wrap the cable once around the ferrite core CRO OUT RI 14 28 6 493182 Wrap the cable once around the ferrite core SIO SEC 8 361814 NOTE Attach and fix the ferrite core near the connector of the cable that connects to the cardiograph 8 1 8 CONNECTOR ASSIGNMENT EXT IN Connector CRO OUT Connector SIO Connector 8 2 Unit side 56 8036 Code No 273446 Cable side 112 3 5mm 0 miniature plug Code No 606907 Pin No Signal EXT IN 1 2 GND Input sensitivity 10 mm 0 5 V input impedance 100 or more CAUTION Do not use the output signal from the output connector for a synchronization signal such as the synchronized cardioversion signal There is a time delay between the input ECG signal and output signal Unit side 56 8036 Code No 273446 Cable side 112 3 5 mm miniature plug Code No 606907 Pin No Signal CRO OUT 2 GND Output sensitivity 0 5 V 1 mV output impedance 100 Q or l
58. mediately after the instrument starts printing If you 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 To cancel printing the following information press the Start Stop key Printout System T EE Cita check System Test Screen Enter test number Press Start Stop key to start test Test number 4 2 Service Manual ECG 9620 Calling up the System Test 1 Level 2 Printout 4 SYSTEM TEST ADJUSTMENT AND SETTING If the power is on turn it off NOTE Release the Feed Mark key immediately after the instrument starts printing If you continue to hold the Feed Mark key for more than 15 seconds the instrument recognizes that the Feed Mark key is short c
59. number Enter getting number and press Start Stop key Number 3150 Service Manual ECG 9620 4 25 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 setting 3 Enter a 4 digit number to enter the new numbers of the year month date or hour minute 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 Input getting number Enter getting number and press Start Stop key Number 3181998 4 26 Service Manual ECG 9620 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING NOTE If 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 the
60. number Press Start Stop key to start test Test number 4 3 4 SYSTEM TEST ADJUSTMENT AND SETTING Entering the System Test Use the following keys on the operation panel to enter a 2 digit number for Number executing the desired system test The specified system test numbers are indicated in the xx bracket at the right of each system test item on the printout output 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 Ca A en cardiofax 5 0 Copy CAL key 5 Rhythm key d 1 F1 function key 6 Age key 2 2 function key 7 Sex key LY 3 F3 function key 8 Feed Mark key D A 4 Mode key 9 Filter key Clear Auto Manual key OS Enter Start Stop key 5 4 4 Service Manual ECG 9620 Executing the System Test Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING Press the Start Stop key For some tests the System Test screen is displayed during the test as shown below System Test Screen Key test Test number 3 If you entered an unspecified number 8 repeating
61. oid vibration and mechanical shock even during transport 3 Avoid placing in an area where chemicals are stored or where there is danger of gas leakage 4 The power line source to be applied to the instrument must correspond in frequency and voltage to product specifications and have sufficient current capacity 5 Choose a room where a proper grounding facility is available 3 Before Operation 1 Check that the instrument is in perfect operating order 2 Check that the instrument is grounded properly 3 Check that all cords are connected properly 4 Pay extra attention when the instrument is in combination with other instruments to avoid misdiagnosis or other problems 5 All circuitry used for direct patient connection must be doubly checked 6 Check that battery level is acceptable and battery condition is good when using battery operated models 4 During Operation 1 Both the instrument and the patient must receive continual careful attention 2 Turn power off or remove electrodes and or transducers when necessary to assure the patient s safety 3 Avoid direct contact between the instrument housing and the patient 5 To Shutdown After Use 1 Turn power off with all controls returned to their original positions 2 Remove the cords gently do not use force to remove them 3 Clean the instrument together with all accessories for their next use 6 Theinstrument must receive expert professional attention for
62. perate properly Yes No settings are correct Yes No The battery is fully charged Yes No Electrode detachment functions properly Yes No There is no error message or abnormal operation Yes No Service Manual ECG 9620 2 5 2 Maintenance Check Sheet 2 2 Monitoring ECG waveform display is correct Yes No The continuity of the ECG connection cable is correct Yes No Heart rate display is correct Yes No QRS sync mark is displayed and heart rate sync sound generates Yes No ECG lead and sensitivity can be changed properly Yes No Alarms setting and alarm function is correct Yes No Sound volume can be changed properly Yes No Recording Paper is fed correctly no skewing or jam Ys J Waveforms and letters are clearly recorded Ys N Time printed on the recording paper is correct Yes No System Test Recorder Pass Fail Key Pass Fail Memory Pass Fail LCD LED Pass Fail Input unit Pass Fail Calibration Pass Fail Communication Pass CRO EXTI Pass Fail Safety Protective earth resistance Pass Fail Earth leakage current Pass Fail Enclosure leakage current Pass Fail Withstanding voltage
63. ppears with one bing bong alarm sound and the instrument returns to the stanby mode for entering the system test number Refer to the operator s manual for the factory initial settings Following is the LCD display after the system has been initialized ovgtem lest Enter test number Press Start Stop key to start test Test number setup Initialization 4 22 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING ECG Findings List Recording Service Manual ECG 9620 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 23 4 SYSTEM TEST ADJUSTMENT AND SETTING Recording Resolution Setting heating element Label Lot No thermal head resistance 4 24 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
64. put impedance Electrode offset tolerance Input unit protection Standard sensitivity Common mode rejection ratio Frequency response Waveform data processor Sample rate AC line filter High cut filter EMG filter Time constant Waveform status detection Sensitivity selection Size Number of dots ECG waveform Displayed data Recorder Printing method Printing density Scanning line density Recording width Number of recording channels Paper speed Number of recording lines Printed data Mechanical noise External input output External input Signal output Serial I O Service Manual ECG 9620 10 MQ or more 500 mV or more Isolated and defibrillator protected only when the following specified patient cable is connected Patient cable BJ 901D BJ 902D BJ 903D BA 901D BA 903D 10 mm mV 2 100 dB or more 0 05 to 150 Hz 3 dB or more 500 samples s input unit 8 000 samples s 50 60 Hz 75 100 150 Hz 25 35 Hz 3 2 s or more Electrode detachment polarization voltage Noise high frequency 5 10 20 mm mV LCD monochrome with CCFT backlight 3 8 inch 320 x 240 6 channel 2 8 s Waveform patient information recording settings operation mode heart rate ORS sync mark error message electrode detachment noise High resolution thermal printer head 200 dpi 8 dots mm ms 56 mm 1 2 3 25 50 mm s Up to 14 Program type version date and time paper speed sensiti
65. r 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 HR OU M 35 Years 4 7 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 Paper speed scales 25 and 50 mm s 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 following has been printed The instrument returns to the standby mode for entering the system test number Printout of Test level 1 take EFANS RQS63 3 Not printed in Test level 2 Refer to the Thermal Head section for this check 4 8 Service Manual ECG 9620 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING Check Procedure for Diagonal Lines Check that all the diagonal lines are evenly and completely printed Possible Source of Problem Corrective Action
66. ress error Replace the ECG control board Service Manual ECG 9620 3 7 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Error No Meaning Corrective Action 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 EEPROM check error installed language error or communication error between the host and EEPROM 16 Local language flash memory error Replace the ECG control board 17 ECG model error Replace the ECG control board 18 Local language is not installed Install the local language 19 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 Install the local language text file which is match the ECG software version the same version as the ECG software 21 ECG interpretation error Time over Check the input waveforms If any noise is superimposed on the waveforms find and eliminate the cause If no noise is superimposed on the waveform replace the ECG control board 22 The entered information does not match Replace the ECG control board the data in the flash memory 27 Program version error The program is Turn the power off then on and check that updated the ECG
67. rom the instrument 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 CAUTIONS Before connecting or disconnecting any cables turn off the instrument unplug the AC power cord from the instrument and remove the battery pack 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 6 DISASSEMBLY Cable Connection CNJ021 80 pin CNJ032 2 pin Buzzer 9 SIO connector CNJ043 miniature plug 011 External input connector CNJ036 10 CNJO41 miniature plug CRO output connector 012 Thermal head CNJO11 16 pin CNJ101 34 pin Key board CNJ201 12 pin 013 CNJ033 24 ECG control board LCD Patient cable connector CN
68. romptly attend to your needs Always use Nihon Kohden parts and accessories to assure maximum performance from your instrument 7 1 Instrument 7 2 7 REPLACEABLE PARTS LIST Index 101 102 103 104 105 106 302 303 304 305 306 307 308 309 310 311 401 402 403 404 501 502 503 504 g awp Code No 085 8 074 00075 085 8 081 00316 085 8 080 00086 085 2 929 00047 085 8 048 00032 085 8 038 00088 085 8 223 00066 085 8 038 00088 085 3 878 00046 085 8 300 00099 085 8 387 00031 085 8 387 00218 107029 6112 017015 00041 00042 085 8 615 00089 085 7 061 00082 085 8 610 00031 6124 00993 085 5 846 00014 085 6 116 00025 085 8 080 00095 624914 UTC 0006 UTC 0007 UTC 0008 RKC 0001 220 RKC 0002 230 RKC 0003 240 RKC 0004 110 RKC 0002 120 RKC 0002 127 Qty N e N N N NF e Description ECG 9620 Upper casing Operation panel LCD filter LCD unit MH604WBEII LCD ground spring LCD ground plate Head collar bearing Thermal head bracket Thermal head KYT 56 8MPPI SKH Thermal head shaft Thermal head spring Paper sensor board ground plate E ring Thermal head unit base Motor assy Magazine assy Spacer bolt Heat sink seat Shield plate Protective ground label Speaker ECG 9620 lower casing Battery cover Rubber foot Key board ECG control board Power board Transfer Assy
69. stem information to your nearest Nihon Kohden distributor helps us to troubleshoot your problem quickly System Information Indicates an error number to identify the problem To solve the problem do the corrective action described below Error No Meaning Corrective Action 00 Input unit error An interrupt signal of 2 ms is generated Replace the ECG control board 01 Input unit error There is no response to the host Replace the ECG control board 02 Input unit error Communication protocol error Replace the ECG control board 03 4 bit CPU error Initialization error Replace the ECG control board 04 4 bit CPU error No response error Replace the ECG control board 05 A key on the key board is short circuited Replace the key board 06 RTC error No interrupt signal of 125 ms Replace the ECG control board 07 RTC error Incorrect data in SRAM Replace the ECG control board 09 The lithium battery to back up the date and time and all system settings is completely discharged The system settings other than the items described in the following note are returned to the factory initial settings Replace the ECG control board The lithium battery is in the real time clock IC on the ECG control board The date and time is reset to January 1 1980 10 Bus error Replace the ECG control board 1 Add
70. stem or cause the equipment and or system to fail to perform its intended function or degrade its intended performance Therefore during the operation of the equipment and or system if there is any undesired deviation from its intended operational performance you must avoid identify and resolve the adverse electromagnetic effect before continuing to use the equipment and or system The following describes some common interference sources and remedial actions 1 Strong electromagnetic interference from a nearby emitter source such as an authorized radio station or cellular phone Install the equipment and or system at another location if it is interfered with by an emitter source such as an authorized radio station Keep the emitter source such as cellular phone away from the equipment and or system 2 Radio frequency interference from other equipment through the AC power supply of the equipment and or system Identify the cause of this interference and if possible remove this interference source If this is not possible use a different power supply 3 Effect of direct or indirect electrostatic discharge Make sure all users and patients in contact with the equipment and or system are free from direct or indirect electrostatic energy before using it 4 Electromagnetic interference with any radio wave receiver such as radio or television If the equipment and or system interferes with any radio wave receiver locate the equipment and or sys
71. t Brinks key light 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Is the recording paper set Set the recording paper Check that the CNAO13 cable is connected to the CNJ033 connector on the ECG control board and CNJ101 connector on the key board Normal The ECG control board is faulty The key board is faulty 3 3 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Troubleshooting Table Troubleshooting General Operation Problem 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 In the Problem column find the trouble item that matches the problem Do the action recommended in the Corrective Action column 2 3 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 Problem Possible Cause Action The power LED lights but nothing is displayed on the LCD screen Faulty cable connection Check the following cable connection CNAO13 between the ECG control board and key board LCD cable CNJ201 connector on the key board CNAO14 between the power board and ECG control board
72. t in the System Test mode e how to initialize the system in the System Test mode e how to adjust the thermal head recording resolution and recording paper cutting position in the System Test mode e how to set date and time in the System Setup mode 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 lt gt perform the same test in Test levels 1 and 2 Each Test level consists of the following system test items Test level 1 Demonstration Recorder Key Memory e LCD LED nput unit e Calibration Communication e CRO EXTI e System Setup Initialization ECG Findings List Recording Test level 2 Recorder Thermal head Key Memory single Memory continuous e LCD LED nput unit Calibration Communication CRO EXTI e System Setup Initialization Recording resolution setting 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 distributor or representative 4 1 4 SYSTEM TEST ADJUSTMENT AND SETTING Calling up the System Test 1 If the power is on turn it off Level 1 NOTE Release the Feed Mark key im
73. tem as far as possible from the radio wave receiver If the above suggested remedial actions do not solve the problem consult your Nihon Kohden Corporation subsidiary or distributor for additional suggestions This equipment complies with EUROPEAN STANDARD EN 60601 1 2 1993 which requires EN 55011 class B Service Manual ECG 9620 iii Conventions Used this Manual and Instrument Dangers Warnings Cautions and Notes Warnings cautions and notes are used in this manual to alert or signal the reader to specific information DANGER A danger is used to alert the user to a hazardous situation which will cause death or serious injury WARNING A warning alerts the user to possible injury or death associated with the use or misuse of the instrument CAUTION A caution alerts the user to possible injury or problems with the instrument associated with its use or misuse such as instrument malfunction instrument failure damage to the instrument or damage to other property NOTE A note provides specific information in the form of recommendations prerequirements alternative methods or supplemental information iv Service Manual ECG 9620 Explanations of the Symbols in this Manual and Instrument The following symbols found in this manual instrument bear the respective descriptions as given Cardiograph Symbol Description Symbol Description Attention consult operator
74. 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 1 Call up the System Test Level 2 2 Enter the system test number between 41 and 48 according to the thermal head resistance value Thermal head resistance System set No 1265 to 1181 Recording resolution setting 41 1180 to 1131 Recording resolution setting2 42 1130 to 986 Recording resolution setting3 43 985 to 976 Recording resolution setting4 44 975 to 966 Recording resolution setting5 45 965 to 956 Recording resolution setting6 46 955 to 946 Recording resolution setting7 47 945 to 935 Recording resolution setting8 48 Current setting Recording resolution setting 49 3 Press the Start Stop key 4 Turn the power off Test level 2 and press the Start Stop key Service Manual ECG 9620 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
75. tion panel Magazine paper container LCD screen Name Magazine release button Patient cable connector Service Manual ECG 9620 Operation Panel Right Side Panel WAJ i 1 GENERAL 1 AC power lamp 8 Age key 2 Battery operation lamp 9 Sex key 3 Battery charge lamp 10 Auto Manual key lamp 4 Power key lamp 11 Feed Mark key 5 Mode key 12 Filter key lamp 6 Rhythm key lamp 13 Copy CAL key lamp 7 F2 function keys 14 Start Stop key lamp CAUTION When connecting an external instrument to connectors marked with the external instrument and this cardiograph must be connected according to the IEC60601 1 1 Medical electrical equipment Part 1 1 General requirements for safety Collateral standard Safety requirements for medical electrical systems Failure to follow this warning may cause electrical shock to the patient and operator Do not use the output signal from the output connector for a synchronization signal such as the synchronized cardioversion signal There is a time delay between the input ECG signal and output signal Service Manual ECG 9620 pese py Name EXT IN connector CRO OUT SIO connector AC power cord socket Equipotential ground terminal 1 GENERAL Rear Panel Battery
76. ttery may leak Do not leave the battery pack where patients can reach it Before disposing of the battery pack check with your local solid waste officials for details in your area for recycling options or proper disposal The battery is recyclable At the end of its useful life under various state and local laws it may be illegal to dispose of this battery into the municipal waste stream CAUTION Enter the patient information correctly Otherwise the ECG data may be lost or mixed up with another patient s ECG data ECG recording judgement The cardiograph provides automatic ECG analysis function The automatic ECG analysis is performed for acquired ECG waveforms only and does not reflect all conditions of the patient The results of the analysis may not correspond to the judgment of a physician Overall judgement must be performed by the physician referring to the analysis result clinical findings and other examination results After the physician s overall judgement the analysis results should be signed or initialed by the physician Take care when judging the ECG recording because the 25 Hz EMG filter may cause greater distortion of P waves and QRS waves depending on the waveform shape The characteristics of the EMG filter are similar to a conventional analog filter Do not use the output signal from the output connector for a synchronization signal such as the synchronized cardioversion signal There is a time delay
77. ulty speaker Replace the speaker The date and time is reset to January 1 1980 and the Error 09 error message appears The lithium battery is completely discharged Replace the ECG control board The lithium battery is in the real time clock IC on the ECG control board Service Manual ECG 9620 3 5 3 TROUBLESHOOTING AND SYSTEM ERROR MESSAGE Troubleshooting Recording Problem Problem Possible Cause Action The recorder does not feed the recording paper when the Start key is pressed Dirty paper sensor Clean the paper sensor Faulty cable connection Check the following cable connection CNAO13 between ECG control board and key board CNAOI1 between the ECG control board and feeding motor motor sensor and paper sensor Faulty key board Replace the key board Faulty ECG control board Replace the ECG control board Faulty feeding motor Replace the feeding motor No printing The thermal head is incorrectly positioned Readjust the position of the thermal head Faulty cable connection Check the following cable connection CNAO013 between ECG control board and key board CNAOI11 between the ECG control board and feeding motor motor sensor and paper sensor Faulty thermal head Replace the thermal head Faulty power board Replace the power board Faulty ECG control board Replace th
78. uring 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 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 Service Manual ECG 9620 4 SYSTEM TEST ADJUSTMENT AND SETTING 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 Check the following cable connection CNAO13 between the ECG control board and key board LCD cable CNJ201 connector on the key board Faulty LCD unit Replace the LCD unit Faulty ECG control board Replace the ECG control board Faulty key board Replace the key board Check Procedure for LED Test Check that all the LEDs on the operation panel light up Possible Source of Problem Corrective Action Faulty cable connection Check the following cable connection CNAO13 between the ECG control board and key board Faulty key board Replace the key board Faulty ECG control board Replace the ECG control board Service Manual ECG 9620 4 15 4 SYSTEM T
79. vity lead name filter Patient information ID number sex age zone timing mark event mark electrode detachment noise 48 dB or less at paper speed 25 mm s 10 mm 0 5 V 5 input impedance 100 or more 0 5 1 mV 5 output impedance 100 Q or less RS 232C 2400 4800 9600 19200 38400 57600 115200 Communication method Baud rate 1 GENERAL Power requirement Line voltage ECG 9620L 220 V AC 10 ECG 9620M 230 V 10 ECG 9620N 240 V AC 10 ECG 9620P 220 V AC 10 ECG 96208 110 V AC 10 ECG 9620T 120 V AC 10 ECG 9620U 127 V AC 10 Line frequency 50 or 60 Hz Power input 45 VA Power consumption 45 W or less Built in battery SB 901D Voltage 12V 6 A or less Battery operation time Approx 90 minutes Current consumption Environment Operating temperature 5 to 40 C 41 to 104 F Operating humidity 25 to 85 RH with battery pack and recording paper 20 to 8596 RH with battery pack and without recording paper 25 to 9096 RH with recording paper and without battery pack 25 to 9596 RH without battery pack and recording paper Operating atmospheric pressure 70 to 106 kPa Storage temperature Cardiograph 20 to 65 C 4 to 149 F Battery pack 20 to 50 C 4 to 122 F within 30 days 20 to 40 C 4 to 104 F within 90 days 20 to 30 C 4 to 86 F within one year Recording paper 20 to 50 C 4 to 122 F Storage humidity Cardiograph 10 to 95 RH non condens
80. y products which prove to be defective during the warranty period provided these products are used as prescribed by the operating instructions given in the operator s and service manuals No other party is authorized to make any warranty or assume liability for NKC s products NKC will not recognize any other warranty either implied or in writing In addition service technical modification or any other product change performed by someone other than NKC or its authorized agents without prior consent of NKC may be cause for voiding this warranty Defective products or parts must be returned to NKC or its authorized agents along with an explanation of the failure Shipping costs must be pre paid This warranty does not apply to products that have been modified disassembled reinstalled or repaired without Nihon Kohden approval or which have been subjected to neglect or accident damage due to accident fire lightning vandalism water or other casualty improper installation or application or on which the original identification marks have been removed ii Service Manual ECG 9620 RELATED CAUTION This equipment and or system complies with the International Standard 60601 1 2 for electromagnetic compatibility for medical electrical equipment and or system However an electromagnetic environment that exceeds the limits or levels stipulated in the IEC60601 1 2 can cause harmful interference to the equipment and or sy

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