Innomed Medical Hear Screen 112C-1 Service Manual
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Innomed Medical Hear Screen 112C-1 Service Manual

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Innomed Medical
Heart Screen 112C-1
Service manual
Service Manual
for
Heart Screen112C-1
Simultaneous 12-channel ECG devices with 112mm wide
3-channel built-in printer and
LCD display
1/47
D-7443-1-C

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Summary of Contents for Innomed Medical Hear Screen 112C-1

  • Page 1 Innomed Medical Heart Screen 112C-1 Service manual Service Manual Heart Screen112C-1 Simultaneous 12-channel ECG devices with 112mm wide 3-channel built-in printer and LCD display 1/47 D-7443-1-C...

  • Page 2: Table Of Contents

    Innomed Medical Heart Screen 112C-1 Service manual 1 Contents CONTENTS ..............................2 THE HEARTSCREEN112C-1 ........................3 DEVICES’ TECHNICAL PARAMETERS ....................4 ..........................4 ENERAL FEATURES DEVICES’ COMPONENTS AND THEIR OPERATION ............... 7 : ..............7 EVICE BLOCK DIAGRAM OF COMPLETE CONFIGURATION 112C-1 M .....................

  • Page 3: The Heartscreen112C-1

    Innomed Medical Heart Screen 112C-1 Service manual 2 The HeartScreen112C-1 The HeartScreen112C-1 is a battery-operated, modern 12-channel electrocardiograph, used to measure and graphically record the heart’s bioelectric potential during human heart and circulatory system examination. The device contains a 8-channel amplifier and ECG signal-processing unit. The built-in thermal printer produces 112mm wide printout.

  • Page 4: Devices' Technical Parameters

    Innomed Medical Heart Screen 112C-1 Service manual 3 Devices’ technical parameters II.a Classification according to 93/42/EEC directive: This product has CE mark according to the 93/42/EEC Council Directive on medical devices, dated on 14. June 1993. 3.1 General features 0... +40 C Reference temperature range 0...
  • Page 5 Innomed Medical Heart Screen 112C-1 Service manual Lead groups Standard: 3 channels: I-III; aVR-aVF; V1-V3; V4-V6 6 channels: I – aVF; V1 – V6 12 channels: I…V6 Cabrera: 3 channels: aVL I -aVR; II aVF III; V1- V3; V4-V6 6 channels: aVL I –aVR II aVF III; V1 V2 V3 V4 V5 V6 12 channels: aV…V6...
  • Page 6 Innomed Medical Heart Screen 112C-1 Service manual Printing speed 5, 25, 50 mm/s Paper width 112 mm +0 -1 mm Paper block (folding) 300 pages, 150 mm long pages Paper replacement automatic feed Warnings Sound signal when out of paper...

  • Page 7: Devices' Components And Their Operation

    Innomed Medical Heart Screen 112C-1 Service manual 4 Devices’ components and their operation 4.1 Device block diagram of complete configuration: 7/47 D-7443-1-C...

  • Page 8: Heartscreen112C-1 Main Board

    Innomed Medical Heart Screen 112C-1 Service manual 4.2 HeartScreen112C-1 Main board Master A/D Slave A/D Processor (U6 !) Patient connector Analog part Digital part Charger 8/47 D-7443-1-C...
  • Page 9 Innomed Medical Heart Screen 112C-1 Service manual HS112C-1 Main board Digital Part Insulation Connection Interface INTERFACE Test Circuits BOARD Connector Pro- cessor ECG data Serial ECG (U24 !) OPTO data isolator (U21) (U201) D[0..7] A[00..18] RTC & RAM Charger Reset...

  • Page 10: Heartscreen112C-1 Main Board Analog Part Block Diagram

    Innomed Medical Heart Screen 112C-1 Service manual 4.3 HeartScreen112C-1 Main board Analog Part block diagram MASTER (U17) limb leads Patient Processor (U6 !) ECG data opto SLAVE isolator (U18) chest leads +VCCAN +3,3V +3,3V Isolated power power supply supply 10/47...

  • Page 11: Heartscreen112C-1 Interface Block Diagram

    Innomed Medical Heart Screen 112C-1 Service manual 4.4 HeartScreen112C-1 Interface block diagram Display Display controller PIC24FJ256DA210 Printer Motor driver ON/OFF button & Power supply +3,3V U9 Head Power U10 11/47 D-7443-1-C...

  • Page 12: Battery Pack

    Innomed Medical Heart Screen 112C-1 Service manual 4.5 Battery pack (R-4322-1_HS112C-1_Assembled_Accupack) The battery pack contains 8 pcs of 2100 mAh rechargeable batteries. The pack is drained at the fourth cell. This output supplies the date / time IC and the record storing RAM with power when the device is turned off.

  • Page 13: Device Mechanical Construction

    Innomed Medical Heart Screen 112C-1 Service manual 4.6 Device mechanical construction 4.6.1 Devices’ summarized exploded diagrams 13/47 D-7443-1-C...

  • Page 14: Devices' Base Exploded Diagram

    Innomed Medical Heart Screen 112C-1 Service manual Devices’ base exploded diagram 4.6.2 14/47 D-7443-1-C...

  • Page 15: Heartscreen112C-1 Top Exploded Diagram

    Innomed Medical Heart Screen 112C-1 Service manual 4.6.3 HeartScreen112C-1 top exploded diagram Display 15/47 D-7443-1-C...

  • Page 16: Board Level Measurements

    Innomed Medical Heart Screen 112C-1 Service manual 5 Board level measurements 5.1 MAIN board volage test: 5.1.1 Checking voltages – digital circuits Check digital +5V voltage at test point J3/1 5V +/-5% Check Vref +2.5V voltage at test point J3/7 5V +/-2% 5.1.2 Checking voltages –...

  • Page 17: Device Level Measurements

    Innomed Medical Heart Screen 112C-1 Service manual 6 Device level measurements 6.1 HeartScreen112C-1 Basic functions Test procedure Comment Patient cable surveillance Connect all the ten banana plugs of the patient cable together, connect the (detecting break in the cable) cable to the device and switch it to monitoring mode.

  • Page 18: Checking Technical Requirements

    Innomed Medical Heart Screen 112C-1 Service manual 6.2 Checking technical requirements 6.2.1 Leakage current measurement Leakage current measurement during operation with 253 V examination voltage. Allowed value / µA / Measurement place Between the mains pins and the protective ground...

  • Page 19: Latch-Up Watch Check

    Innomed Medical Heart Screen 112C-1 Service manual 6.2.3 Latch-up watch check Only connect the DC generator to the amplifier input according to the table. The DC level has to be controlled between 0 and 450 mV. The filter must be turned off.

  • Page 20: Checking Frequency Response

    Innomed Medical Heart Screen 112C-1 Service manual 6.2.5 Checking frequency response Apply +DC signal onto the amplifier’s input (2000 +/-0.5% µVpp / 150 Hz sine) from a ground independent generator according to the table. DC must be +320, -320 mV.

  • Page 21: Checking Filter

    Innomed Medical Heart Screen 112C-1 Service manual 6.2.6 Checking filter a. “Line” filter on at 50Hz Apply 4 mVpp 50Hz sine signal from the generator between the device’s V2 and all other connected inputs. The filter is acceptable if the dampening is less than 20dB when the frequency is changed in the 48.5 Hz - 51.5 Hz range.

  • Page 22: Checking Pc Connection

    Innomed Medical Heart Screen 112C-1 Service manual 6.2.9 Checking PC connection Connect an ECG signal generator to the device input. Monitor the signal on the PC and switch over all the amplification levels, the filter, and all the leads. Check that the setting on the PC and the signal match those on the device.
  • Page 23 Innomed Medical Heart Screen 112C-1 Service manual Screw 3. Remove the 6 screws indicated. 4. Lift the device top part according the figure below. 5. Disconnect the cables and remove the device top. 23/47 D-7443-1-C...

  • Page 24: Disassembly Of The Bottom Part:remove The Battery Connections

    Innomed Medical Heart Screen 112C-1 Service manual 7.1.1 Disassembly of the bottom part:Remove the battery connections. After removing the appropriate screws the components in the bottom part can be aslo removed. 24/47 D-7443-1-C...

  • Page 25: Reprogramming The Device

    Innomed Medical Heart Screen 112C-1 Service manual 7.2 Reprogramming the device Beside the device, the following are required to reprogram the device: USB cable The software update program package The reprogramming procedure 1. Extract the ZIP file to the C: driver After extracting you will find an IFU directory in which you should start the "...

  • Page 26: Possible Errors And Troubleshooting

    Innomed Medical Heart Screen 112C-1 Service manual 8 Possible errors and troubleshooting Problem Possible causes Solutions When connecting the device to the One of the fuses in the device has Change the fuse and find the reason mains, the appropriate voltage burned out.
  • Page 27 Innomed Medical Heart Screen 112C-1 Service manual Problem Possible causes Solutions There is no picture on the screen. LCD cable failure. Check the connection of the LCD FFC The printer works. cable. Change the Interface Board The Interface Board is damaged.
  • Page 28 Innomed Medical Heart Screen 112C-1 Service manual Problem Possible causes Solutions When turned on, the device always The battery, or its connection / Check the battery. starts with a memory error. cable is damaged. Check the soldering on the digital part of the Main Board.
  • Page 29 Innomed Medical Heart Screen 112C-1 Service manual Problem Possible causes Solutions The printed curve is missing along The printer head is dirty or a pixel Clean the printer burning head with a horizontal line. has burnt out on the burning head.

  • Page 30: Assembly Drawings

    Innomed Medical Heart Screen 112C-1 Service manual Assembly drawings 9.1 HeartScreen112C-1 Main board 30/47 D-7443-1-C...
  • Page 31 Innomed Medical Heart Screen 112C-1 Service manual BOTTOM: 31/47 D-7443-1-C...

  • Page 32: Heartscreen112C-1 Interface Board

    Innomed Medical Heart Screen 112C-1 Service manual 9.2 HeartScreen112C-1 Interface Board 32/47 D-7443-1-C...
  • Page 33 Innomed Medical Heart Screen 112C-1 Service manual BOTTOM: 33/47 D-7443-1-C...

  • Page 34: Schematics

    Innomed Medical Heart Screen 112C-1 Service manual Schematics 10.1 HeartScreen112C-1 Main Board 34/47 D-7443-1-C...
  • Page 35 Innomed Medical Heart Screen 112C-1 Service manual 35/47 D-7443-1-C...
  • Page 36 Innomed Medical Heart Screen 112C-1 Service manual 36/47 D-7443-1-C...
  • Page 37 Innomed Medical Heart Screen 112C-1 Service manual 37/47 D-7443-1-C...
  • Page 38 Innomed Medical Heart Screen 112C-1 Service manual 38/47 D-7443-1-C...
  • Page 39 Innomed Medical Heart Screen 112C-1 Service manual 39/47 D-7443-1-C...
  • Page 40 Innomed Medical Heart Screen 112C-1 Service manual 40/47 D-7443-1-C...
  • Page 41 Innomed Medical Heart Screen 112C-1 Service manual 41/47 D-7443-1-C...
  • Page 42 Innomed Medical Heart Screen 112C-1 Service manual 42/47 D-7443-1-C...
  • Page 43 Innomed Medical Heart Screen 112C-1 Service manual 43/47 D-7443-1-C...

  • Page 44: Heartscreen112C-1 Interface Board

    Innomed Medical Heart Screen 112C-1 Service manual 10.2 HeartScreen112C-1 Interface Board 44/47 D-7443-1-C...
  • Page 45 Innomed Medical Heart Screen 112C-1 Service manual 45/47 D-7443-1-C...
  • Page 46 Innomed Medical Heart Screen 112C-1 Service manual 46/47 D-7443-1-C...

  • Page 47: Heartscreen112C-1 Battery Package

    Innomed Medical Heart Screen 112C-1 Service manual 10.3 HeartScreen112C-1 Battery package 47/47 D-7443-1-C...

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